CN113685388B - Water-based proportional pressure-reducing overflow valve - Google Patents
Water-based proportional pressure-reducing overflow valve Download PDFInfo
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- CN113685388B CN113685388B CN202110815379.1A CN202110815379A CN113685388B CN 113685388 B CN113685388 B CN 113685388B CN 202110815379 A CN202110815379 A CN 202110815379A CN 113685388 B CN113685388 B CN 113685388B
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- valve
- cavity
- relief
- pressure reducing
- relief valve
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 230000013011 mating Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 7
- 238000013016 damping Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006837 decompression Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/029—Counterbalance valves
Abstract
The invention discloses a water-based proportional pressure reducing overflow valve, which comprises a valve body, a valve sleeve, a pressure reducing valve core, an overflow valve core, an elastic piece and an electro-mechanical conversion element, wherein the valve body is provided with a liquid supply channel, a pressure reducing channel and an unloading channel, the valve sleeve is arranged in the valve body and is provided with a liquid supply cavity, a pressure reducing cavity and an unloading cavity, the pressure reducing valve core is slidably connected with the valve body, the unloading cavity is divided into a first cavity and a second cavity, the first cavity is communicated with the pressure reducing cavity, the second cavity is communicated with the unloading channel, the overflow valve core is positioned in the first cavity and is connected with the pressure reducing valve core, the pressure reducing valve core can drive the overflow valve core to move so as to open an overflow valve port, the elastic piece presses the overflow valve core towards the direction of closing the overflow valve port, and the electro-mechanical conversion element is in driving connection with the pressure reducing valve core. The water-based proportional pressure reducing overflow valve provided by the invention has the advantages of low processing and assembling difficulty and stable output pressure of the pressure reducing valve port.
Description
Technical Field
The invention relates to the technical field of proportional pressure reducing valves, in particular to a water-based proportional pressure reducing overflow valve.
Background
In the prior art, proportional pressure reducing valves are typically oil-based proportional pressure reducing valves. In oil-based technology, the proportional pressure reducing valve mainly adopts a slide valve structure, is mainly of a valve core integrated type and is of a valve cavity stepped structure, and the opening of a pressure reducing valve port is controlled by directly driving the pressure reducing valve core through a proportional electromagnet, a stepping motor and the like through reasonably designing the side area of an inlet and an outlet of the pressure reducing valve, so that the outlet pressure reducing function is realized. However, the slide valve structure is not suitable for water-based media, because the viscosity of water is low, the lubricating performance is poor, the slide valve is sensitive to fit clearance, and the leakage is serious if the clearance is too large; the gap is too small, so that the clamping stagnation is easy; and the processing and assembling difficulties are high.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides the water-based proportional pressure reducing relief valve, which has the advantages of low processing and assembling difficulties and stable output pressure of the pressure reducing valve port.
The water-based proportional pressure reducing and relief valve comprises a valve body, a valve sleeve, a pressure reducing valve core, a relief valve core, an elastic piece and an electro-mechanical conversion element, wherein the valve body is provided with a liquid supply channel, a pressure reducing channel and an unloading channel; the valve sleeve is arranged in the valve body and is provided with a liquid supply cavity, a pressure reduction cavity and an unloading cavity which are sequentially arranged, the liquid supply cavity is communicated with the liquid supply channel, and the pressure reduction cavity is communicated with the pressure reduction channel; the pressure reducing valve core is slidably connected with the valve sleeve and is at least partially positioned in the liquid supply cavity and the pressure reducing cavity, and an opening-adjustable pressure reducing valve port is formed between the inner surface of the pressure reducing cavity and the outer surface of the pressure reducing valve core; the relief valve core is slidably connected with the valve sleeve, an opening-adjustable relief valve port is formed between the outer surface of the relief valve core and the inner surface of the unloading cavity, the relief valve port divides the unloading cavity into a first cavity and a second cavity, the first cavity is communicated with the pressure reducing cavity, the second cavity is communicated with the unloading channel, the relief valve core is positioned in the first cavity and is connected with the pressure reducing valve core, and the pressure reducing valve core can drive the relief valve core to move so as to open the relief valve port; the elastic piece is connected with the overflow valve core and the valve sleeve and presses the overflow valve core towards the direction of closing the overflow valve port; the electro-mechanical switching element is drivingly connected to the relief valve element to balance the pressure differential between the supply and relief passages.
According to the water-based proportional pressure reducing relief valve of the embodiment of the invention, the output quantity of the electro-mechanical conversion element is acted on the pressure reducing valve core to control the opening degree of the pressure reducing valve port, thereby controlling the output pressure. Through connecting the overflow valve core in series on the pressure reducing valve core, when the output pressure of the pressure reducing channel is overlarge, the pressure reducing valve core drives the overflow valve core to move so as to open the overflow valve port, so that water flows out of the unloading channel, the pressure of the pressure reducing valve port is restored to a set value, the pressure reducing valve core can return to the balance position again, and the output pressure of the pressure reducing valve port is ensured to be stable. Moreover, the pressure reducing function is realized by arranging the pressure reducing valve port for throttling, the defects of difficult processing caused by pressure reduction through the slender damping hole and easy blockage of the damping hole are avoided, and the processing and assembling difficulties of the water-based proportional pressure reducing overflow valve are low.
In some embodiments, the water-based proportional relief valve further includes a stop pin coupled to the relief valve spool, a first end face of the relief valve spool is provided with a mating groove, at least a portion of the stop pin is positioned within the mating groove and spaced apart from a bottom surface of the mating groove, a first end of the relief valve spool is provided with a stop flange that fits within the mating groove, and the stop flange is positioned between the stop pin and the bottom surface of the mating groove.
In some embodiments, the limit flange is spaced apart from the limit pin when the relief valve port is in a closed state.
In some embodiments, the limit flange is provided with a spiral groove for screwing in the limit pin.
In some embodiments, the outer surface of the pressure relief valve element includes a diversion cone.
In some embodiments, the outer surface of the relief valve element includes a stepped surface that opposes the flow direction of the water-based fluid.
In some embodiments, the electro-mechanical conversion element comprises a proportional electromagnet and a push rod connected with a driving end of the proportional electromagnet, the water-based proportional relief and relief valve further comprises a lever, a first end of the lever is pivotably connected with the valve body, the push rod is stopped against a second end of the lever, a second end of the relief valve core is stopped against a middle part of the lever, and a second end face of the relief valve core is spherical.
In some embodiments, the valve sleeve comprises a liquid supply valve sleeve, a pressure reducing valve sleeve and an unloading valve sleeve which are sequentially arranged, the liquid supply cavity is formed in the liquid supply valve sleeve, the pressure reducing cavity and the first cavity are formed in the pressure reducing valve sleeve, the second cavity is formed in the unloading valve sleeve, the liquid supply valve sleeve is in interference fit with the pressure reducing valve sleeve, a pressure reducing valve seat is clamped between the liquid supply valve sleeve and the pressure reducing valve sleeve, the pressure reducing valve sleeve is in interference fit with the unloading valve sleeve and is connected through a threaded piece, an overflow valve seat is clamped between the pressure reducing valve sleeve and the unloading valve sleeve, a drainage inclined hole which is communicated with the pressure reducing cavity and the first cavity is formed in the pressure reducing valve sleeve, and the unloading valve sleeve is in threaded fit with the valve body.
In some embodiments, the pressure reducing valve sleeve comprises a first valve sleeve and a second valve sleeve, the first valve sleeve is in interference fit with the second valve sleeve, the pressure reducing cavity is formed in the first valve sleeve, the first chamber is formed in the second valve sleeve, the pressure reducing valve core is provided with a first drainage hole, the overflow valve core is provided with a second drainage hole, and the pressure reducing cavity is communicated with the first chamber through the first drainage hole and the second drainage hole.
In some embodiments, the valve sleeves, the pressure reducing valve core and the overflow valve core are two in number and correspond to each other one by one, the two valve sleeves are all installed in the valve body, and the electro-mechanical conversion element is a double-head proportional electromagnet.
Drawings
FIG. 1 is a schematic diagram of a water-based proportional relief valve according to an embodiment of the present invention.
FIG. 2 is a schematic illustration of a pressure relief valve spool and relief valve spool junction in a water-based proportional relief valve in accordance with an embodiment of the present invention, wherein the relief valve port is in a closed state.
FIG. 3 is a schematic illustration of the junction of a relief valve spool and a relief valve spool in a water-based proportional relief valve according to an embodiment of the present invention, wherein the relief valve port is in an open state.
FIG. 4 is another schematic diagram of a water-based proportional relief valve according to an embodiment of the present invention.
FIG. 5 is another schematic illustration of the junction of a relief valve spool and a relief valve spool in a water-based proportional relief valve according to an embodiment of the present invention, wherein the relief valve port is in a closed state.
FIG. 6 is another schematic diagram of a junction of a relief valve spool and a relief valve spool in a water-based proportional relief valve according to an embodiment of the present invention, wherein the relief valve port is in an open state.
FIG. 7 is yet another schematic diagram of a water-based proportional relief valve in accordance with an embodiment of the present invention.
Reference numerals:
the valve body 1, the liquid supply channel 11, the pressure reducing channel 12, the unloading channel 13, the valve sleeve 2, the liquid supply valve sleeve 21, the liquid supply cavity 211, the pressure reducing valve sleeve 22, the first valve sleeve 221, the pressure reducing cavity 2211, the second valve sleeve 222, the first chamber 2221, the drainage inclined hole 223, the unloading valve sleeve 23, the second chamber 231, the pressure reducing valve port 24, the overflow valve port 25, the pressure reducing valve core 3, the diversion conical surface 31, the step surface 32, the first drainage hole 33, the limiting pin 34, the overflow valve core 4, the second drainage hole 41, the limiting flange 42, the spiral groove 421, the elastic piece 5, the spring 51, the proportional electromagnet 6, the ejector rod 61, the lever 7, the pressure reducing valve seat 8 and the overflow valve seat 9.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A water-based proportional relief valve according to an embodiment of the present invention is described below in conjunction with fig. 1-7.
As shown in fig. 1 to 7, the water-based proportional relief valve according to the embodiment of the present invention includes a valve body 1, a valve housing 2, a relief valve core 3, a relief valve core 4, an elastic member 5, and an electro-mechanical switching element. The valve body 1 has a liquid supply passage 11, a pressure reducing passage 12, and an unloading passage 13.
The valve housing 2 is installed in the valve body 1 and has a liquid supply chamber 211, a pressure reduction chamber 2211 and an unloading chamber arranged in order, the liquid supply chamber 211 is communicated with the liquid supply passage 11, and the pressure reduction chamber 2211 is communicated with the pressure reduction passage 12. Pressure relief valve element 3 is slidably coupled to valve housing 2 and is at least partially disposed within fluid supply chamber 211 and pressure relief chamber 2211, with an opening-adjustable relief valve port 24 being defined between an inner surface of pressure relief chamber 2211 and an outer surface of pressure relief valve element 3.
The overflow valve core 4 is slidably connected with the valve sleeve 2, an opening-adjustable overflow valve port 25 is formed between the outer surface of the overflow valve core 4 and the inner surface of the unloading cavity, the unloading cavity is divided into a first cavity 2221 and a second cavity 231 by the overflow valve port 25, the first cavity 2221 is communicated with the decompression cavity 2211, the second cavity 231 is communicated with the unloading channel 13, the overflow valve core 4 is located in the first cavity 2221 and is connected with the decompression valve core 3, and the decompression valve core 3 can drive the overflow valve core 4 to move so as to open the overflow valve port 25.
The elastic member 5 connects the relief valve element 4 and the valve housing 2 and urges the relief valve element 4 in a direction to close the relief valve port 25. The elastic member 5 is a spring 51 and is located in the first chamber 2221, one end of the relief valve core 4, which is away from the pressure reducing valve core 3, is provided with a stop portion, and the spring 51 is sleeved on the relief valve core 4 and is clamped between the stop portion and the valve sleeve 2. The electro-mechanical switching element is in driving connection with the pressure relief valve core 3 in order to equalize the pressure difference between the feed channel 11 and the pressure relief channel 12.
According to the water-based proportional pressure reducing relief valve of the embodiment of the present invention, the output pressure is controlled by applying the output quantity of the electro-mechanical switching element to the pressure reducing valve spool 3 to control the opening degree of the pressure reducing valve port 24. By connecting the overflow valve core 4 in series with the pressure reducing valve core 3, when the output pressure of the pressure reducing channel 12 is overlarge, the pressure reducing valve core 3 drives the overflow valve core 4 to move to open the overflow valve port 25 so that water flows out of the unloading channel 13, thereby the pressure of the pressure reducing valve port 24 is restored to a set value, the pressure reducing valve core 3 can return to the balance position again, and the output pressure of the pressure reducing valve port 24 is ensured to be stable. Moreover, the pressure reducing function is realized by arranging the throttling of the pressure reducing valve port 24, the defects of difficult processing caused by pressure reduction through the slender damping hole and easy blockage of the damping hole are avoided, and the processing and assembling difficulties of the water-based proportional pressure reducing overflow valve are low.
In some embodiments, as shown in fig. 2, 3, 5 and 6, the water-based proportional relief valve further includes a stop pin 34 coupled to the relief valve spool 3, the stop pins 34 being two and coaxially disposed. The first end face of the pressure reducing valve core 3 is provided with a matching groove which is a cylindrical groove. At least part of the limiting pin 34 is located in the matching groove and is spaced from the bottom surface of the matching groove, the first end of the overflow valve core 4 is provided with a limiting flange 42, the limiting flange 42 is matched in the matching groove, and the limiting flange 42 is located between the limiting pin 34 and the bottom surface of the matching groove.
Thus, when the pressure of the pressure reducing passage 12 is excessively high to move the pressure reducing valve element 3 toward the electro-mechanical switching element with respect to the valve body 1, the stopper flange 42 is stopped by the stopper pin 34 to drive the relief valve element 4 to move simultaneously, thereby opening the relief valve port 25 and realizing the relief unloading function.
In some embodiments, as shown in fig. 1, 2, 4, and 5, the check flange 42 is spaced apart from the check pin 34 when the relief valve port 25 is in the closed state.
Namely, the relief valve core 3 is not rigidly connected with the overflow valve core 4, but the relief valve core 3 can drive the overflow valve core 4 to move after a certain stroke, so that the relief valve port 25 is opened when the relief valve core 3 initially moves, and the pressure adjustability of the relief valve port 24 is damaged.
In some embodiments, as shown in fig. 2 and 3, the limit flange 42 is provided with a spiral groove 421 into which the limit pin 34 is screwed.
That is, by threading the stop pin 34 into the spiral groove 421 to pass the stop flange 42, thereby fitting into the annular groove below the stop flange 42, while the stop pin 34 has been installed at the first end of the relief valve spool 3, a non-rigid connection of the relief valve spool 3 to the relief valve spool 4 is achieved.
In some embodiments, as shown in fig. 1 and 4, the outer surface of pressure relief valve element 3 includes a diversion cone 31. The diversion cone surface 31 is used for diversion, so that the water-based pressure impact can be reduced, and the steady-state characteristic of the pressure reducing valve core 3 can be improved.
In some embodiments, the outer surface of relief valve element 3 includes a stepped surface 32, with stepped surface 32 being opposite the direction of flow of the water-based. The pressure reducing valve core 3 adopts a spring-free structure, realizes balance adjustment of water-based pressure through the stepped surface 32, and performs proportional adjustment of the opening of the pressure reducing valve port 24 by an electro-mechanical conversion element. Therefore, the water-based proportional pressure reducing overflow valve has the advantages of simple structure and low processing and assembling difficulties.
In some embodiments, as shown in fig. 1, 4 and 7, the electro-mechanical switching element comprises a proportional electromagnet 6 and a jack 61 connected to the driving end of the proportional electromagnet 6. The water-based proportional pressure reducing overflow valve further comprises a lever 7, a first end of the lever 7 is pivotally connected with the valve body 1, the ejector rod 61 abuts against a second end of the lever 7, a second end of the pressure reducing valve core 3 abuts against the middle part of the lever 7, and a second end face of the pressure reducing valve core 3 is spherical.
By providing the lever 7, the pressure reducing valve core 3 is driven by the lever 7, and the output requirement of the proportional electromagnet 6 can be reduced. By providing the second end surface of the relief valve spool 3 as a spherical surface, the lateral force generated during the pushing of the relief valve spool 3 by the lever 7 can be reduced.
In some embodiments, as shown in fig. 1, the valve housing 2 includes a fluid supply valve housing 21, a relief valve housing 22, and an unloading valve housing 23, which are arranged in sequence. The fluid supply chamber 211 is formed in the fluid supply valve housing 21, the relief chamber 2211 and the first chamber 2221 are formed in the relief valve housing 22, and the second chamber 231 is formed in the relief valve housing 23. The liquid supply valve sleeve 21 is in interference fit with the pressure relief valve sleeve 22, a pressure relief valve seat 8 is clamped between the liquid supply valve sleeve 21 and the pressure relief valve sleeve 22, the pressure relief valve sleeve 22 is in interference fit with the unloading valve sleeve 23 and is connected with the unloading valve sleeve 23 through a screw, and an overflow valve seat 9 is clamped between the pressure relief valve sleeve 22 and the unloading valve sleeve 23. The pressure reducing valve sleeve 22 is provided with a drainage inclined hole 223 which is communicated with the pressure reducing cavity 2211 and the first cavity 2221, and the unloading valve sleeve 23 is in threaded fit with the valve body 1.
By employing a seat valve structure, the problem of large internal leakage or large friction due to the fit clearance can be reduced compared to a spool valve structure. Meanwhile, the liquid supply valve sleeve 21, the pressure reducing valve sleeve 22 and the unloading valve sleeve 23 are in split type plug-in mounting and threaded matching, so that the liquid supply valve sleeve 21, the pressure reducing valve sleeve 22, the unloading valve sleeve 23, the pressure reducing valve core 3 and the overflow valve core 4 are convenient to assemble and disassemble.
Specifically, a seal ring is provided between each of the fluid supply valve housing 21, the pressure reducing valve housing 22, and the unloading valve housing 23 and the valve body 1, a seal ring is provided between each of the fluid supply valve housing 21 and the pressure reducing valve housing 22 and the pressure reducing valve spool 3, and a seal ring is provided between the pressure reducing valve housing 22 and the relief valve spool 4. Thereby, sealability between the liquid supply chamber 211 and the pressure reduction chamber 2211, and sealability between the pressure reduction chamber 2211 and the first chamber 2221 are effectively achieved.
In some embodiments, as shown in fig. 4-6, the relief valve sleeve 22 includes a first valve sleeve 221 and a second valve sleeve 222. The first valve sleeve 221 is in interference fit with the second valve sleeve 222, the pressure reducing chamber 2211 is formed in the first valve sleeve 221, and the first chamber 2221 is formed in the second valve sleeve 222. The relief valve core 3 is provided with a first drainage hole 33, the overflow valve core 4 is provided with a second drainage hole 41, and the relief cavity 2211 is communicated with the first cavity 2221 through the first drainage hole 33 and the second drainage hole 41.
Thus, the pressure reducing valve housing 22 does not need to be provided with the drainage inclined hole 223 for drainage. In addition, compared with the three-stage split valve sleeve structure in the scheme, the four-stage split valve sleeve structure is more convenient for connecting the pressure reducing valve core 3 with the overflow valve core 4, namely, the pressure reducing valve core 3 and the overflow valve core 4 are conveniently connected by using the limiting pin 34.
In some embodiments, the number of valve sleeves 2, the number of the pressure reducing valve cores 3 and the number of the overflow valve cores 4 are two and are in one-to-one correspondence, the two valve sleeves 2 are all installed in the valve body 1, and the electro-mechanical conversion element is a double-head proportional electromagnet.
Two proportional pressure reducing overflow valves are integrated in one valve body 1 and driven by double-head proportional electromagnets, so that the structure is more compact and the valve is more suitable for narrow spaces such as coal mines.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A water-based proportional pressure reducing relief valve, comprising:
the valve body is provided with a liquid supply channel, a pressure reduction channel and an unloading channel;
the valve sleeve is arranged in the valve body and is provided with a liquid supply cavity, a pressure reduction cavity and an unloading cavity which are sequentially arranged, the liquid supply cavity is communicated with the liquid supply channel, and the pressure reduction cavity is communicated with the pressure reduction channel;
the pressure reducing valve core is slidably connected with the valve sleeve and is at least partially positioned in the liquid supply cavity and the pressure reducing cavity, and an opening-adjustable pressure reducing valve port is formed between the inner surface of the pressure reducing cavity and the outer surface of the pressure reducing valve core;
the overflow valve core is slidably connected with the valve sleeve, an opening-adjustable overflow valve port is formed between the outer surface of the overflow valve core and the inner surface of the unloading cavity, the unloading cavity is divided into a first cavity and a second cavity by the overflow valve port, the first cavity is communicated with the pressure reducing cavity, the second cavity is communicated with the unloading channel, the overflow valve core is positioned in the first cavity and is connected with the pressure reducing valve core, and the pressure reducing valve core can drive the overflow valve core to move so as to open the overflow valve port;
the elastic piece is connected with the overflow valve core and the valve sleeve and presses the overflow valve core towards the direction of closing the overflow valve port; and
an electro-mechanical switching element in driving communication with the pressure relief valve spool to balance a pressure differential between the supply and relief passages.
2. The water-based proportional pressure relief and relief valve of claim 1, further comprising a stop pin coupled to the pressure relief valve spool, wherein a first end face of the pressure relief valve spool is provided with a mating groove, wherein at least a portion of the stop pin is positioned within the mating groove and spaced apart from a bottom face of the mating groove, wherein a first end of the relief valve spool is provided with a stop flange that fits within the mating groove, and wherein the stop flange is positioned between the stop pin and the bottom face of the mating groove.
3. The water-based proportional pressure relief and relief valve as claimed in claim 2, wherein said limit flange is spaced from said limit pin when said relief valve port is in a closed condition.
4. The water-based proportional pressure reducing and overflow valve according to claim 2, wherein the limit flange is provided with a spiral groove for screwing in the limit pin.
5. The water-based proportional pressure relief and relief valve of claim 1, wherein an outer surface of the pressure relief valve spool comprises a diversion cone.
6. The water-based proportional relief and relief valve of claim 1, wherein an outer surface of the relief valve spool includes a stepped surface opposite a flow direction of the water-based.
7. The water-based proportional relief and relief valve of claim 1, wherein the electro-mechanical switching element comprises a proportional electromagnet and a ram coupled to a drive end of the proportional electromagnet, the water-based proportional relief and relief valve further comprising a lever having a first end pivotally coupled to the valve body, the ram abutting a second end of the lever, a second end of the relief valve element abutting a middle portion of the lever, and a second end face of the relief valve element being spherical.
8. The water-based proportional relief valve according to claim 1, wherein the valve sleeve comprises a liquid supply valve sleeve, a relief valve sleeve and an unloading valve sleeve which are sequentially arranged, the liquid supply cavity is formed in the liquid supply valve sleeve, the relief cavity and the first cavity are formed in the relief valve sleeve, the second cavity is formed in the unloading valve sleeve, the liquid supply valve sleeve is in interference fit with the relief valve sleeve, a relief valve seat is clamped between the liquid supply valve sleeve and the relief valve sleeve, the relief valve sleeve is in interference fit with the unloading valve sleeve and is connected with the relief valve sleeve through a screw member, an relief valve seat is clamped between the relief valve sleeve and the unloading valve sleeve, a drainage inclined hole for communicating the relief cavity with the first cavity is formed in the relief valve sleeve, and the unloading valve sleeve is in threaded fit with the valve body.
9. The water-based proportional relief and overflow valve according to claim 8, wherein the relief valve sleeve comprises a first valve sleeve and a second valve sleeve, the first valve sleeve is in interference fit with the second valve sleeve, the relief cavity is formed in the first valve sleeve, the first chamber is formed in the second valve sleeve, the relief valve core is provided with a first drainage hole, the overflow valve core is provided with a second drainage hole, and the relief cavity is communicated with the first chamber through the first drainage hole and the second drainage hole.
10. The water-based proportional pressure reducing and relief valve according to claim 1, wherein the number of valve sleeves, the number of pressure reducing valve spools and the number of relief valve spools are two and correspond one to one, the two valve sleeves are all arranged in the valve body, and the electro-mechanical conversion element is a double-head proportional electromagnet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110815379.1A CN113685388B (en) | 2021-07-19 | 2021-07-19 | Water-based proportional pressure-reducing overflow valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110815379.1A CN113685388B (en) | 2021-07-19 | 2021-07-19 | Water-based proportional pressure-reducing overflow valve |
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| CN113685388A CN113685388A (en) | 2021-11-23 |
| CN113685388B true CN113685388B (en) | 2023-12-12 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001074154A (en) * | 1999-09-07 | 2001-03-23 | Kayaba Ind Co Ltd | Proportional electromagnetic relief valve |
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| JP2001074154A (en) * | 1999-09-07 | 2001-03-23 | Kayaba Ind Co Ltd | Proportional electromagnetic relief valve |
| JP2007156895A (en) * | 2005-12-06 | 2007-06-21 | Tokyo Institute Of Technology | Low pressure fluid reducing valve with relief function |
| CN102537444A (en) * | 2011-05-11 | 2012-07-04 | 上海大学 | Miniature front pressure-reducing valve type ultrahigh pressure overflow valve |
| CN104196803A (en) * | 2014-09-11 | 2014-12-10 | 中国农业大学 | Multifunctional thread insertion valve used for heavy tractor electro-hydraulic lifter |
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