CN116951145A - Overpressure protection overflow valve - Google Patents
Overpressure protection overflow valve Download PDFInfo
- Publication number
- CN116951145A CN116951145A CN202311205186.XA CN202311205186A CN116951145A CN 116951145 A CN116951145 A CN 116951145A CN 202311205186 A CN202311205186 A CN 202311205186A CN 116951145 A CN116951145 A CN 116951145A
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- oil
- valve
- pressure
- close
- blocking
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- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract 5
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract 5
- 241001330002 Bambuseae Species 0.000 claims abstract 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract 5
- 239000011425 bamboo Substances 0.000 claims abstract 5
- 230000000903 blocking effect Effects 0.000 claims description 65
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000013016 damping Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/105—Three-way check or safety valves with two or more closure members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0473—Multiple-way safety valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0486—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with mechanical actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/08—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for providing a large discharge passage
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention belongs to the technical field of pressure control valves, and particularly relates to an overpressure protection overflow valve capable of reducing oil pressure in an oil outlet and avoiding affecting normal operation of equipment connected with the oil outlet of the overflow valve. The utility model provides an excessive pressure protection overflow valve, is including valve main part and pressure release subassembly etc. pressure release subassembly sets up valve main part is kept away from first oil pocket one side, be provided with the throat elasticity section of thick bamboo in the oil guide cavity, be close to in the oil guide cavity oil-out one side swivelling joint has the dwang, and the pressure release piece is close to oil-out one side with be equipped with drive assembly between the dwang. When the oil pressure in the oil inlet cavity is greater than the elasticity of the main valve spring, the pressure oil can enter the diversion channel, the pressure relief assembly is opened, and the necking elastic cylinder automatically contracts through the driving assembly, so that the pressure oil can be reduced to flow out from the oil outlet, the pressure oil is diverted through the diversion channel, the oil pressure of the oil outlet and the oil inlet cavity is reduced, and equipment connected with the oil outlet is protected.
Description
Technical Field
The invention belongs to the technical field of pressure control valves, and particularly relates to an overpressure protection overflow valve.
Background
The overflow valve is a hydraulic pressure control valve, an oil inlet of the overflow valve is generally arranged at an outlet of the hydraulic pump, an oil outlet of the overflow valve is connected with equipment, and when the pressure of the hydraulic pump is too high, the overflow valve can be used for relieving pressure, so that the pressure overload of the hydraulic pump is prevented, and the safe operation of the hydraulic pump is ensured.
The patent publication No. CN116428233A discloses a double-working overflow valve, which comprises a main valve body, wherein an oil inlet and an oil outlet are formed in the main valve body, a main valve assembly and an overflow valve assembly are arranged in the main valve body, and a passage is formed between the oil inlet and the oil outlet through the main valve assembly and the overflow valve assembly; the overflow valve assembly comprises an overflow valve body arranged between the oil inlet and the oil outlet passage, an overflow valve damping port is formed in the overflow valve body, and the overflow valve assembly controls the opening and closing of the overflow valve damping port through pressure so as to control the inlet pressure at the oil inlet; the main valve body is internally provided with a first oil cavity and a second oil cavity, the first oil cavity is communicated with the oil inlet, and the overflow valve body is arranged in the second oil cavity.
The working principle of the double-working overflow valve disclosed above is as follows: when the pressure of the pressure oil is larger than that of the damping port of the overflow valve, the damping port of the overflow valve is opened, the pressure oil enters the oil outlet through the damping port of the overflow valve, the second oil cavity and the like and flows out through the oil outlet to complete the function of the overflow valve, when the oil pressure of the oil outlet is overlarge, the pressure reducing valve assembly automatically opens a passage between the oil outlet and the split port, then partial pressure oil in the oil outlet is discharged through the passage, so that the pressure of the oil outlet can be stabilized in a split-pressure reducing mode, if the oil pressure in the oil outlet is continuously increased, and because the oil pressure in the split port is communicated with the split port, the oil pressure in the passage is increased, and if the oil pressure in the passage cannot be relieved again, the normal operation of equipment connected with the oil outlet of the overflow valve is influenced because the oil pressure is overlarge, the overpressure protection overflow valve capable of reducing the oil pressure in the oil outlet and avoiding the normal operation of the equipment connected with the oil outlet is developed.
Disclosure of Invention
In order to overcome the defect that the normal operation of equipment connected with the oil outlet of the overflow valve is influenced by overlarge oil pressure in the oil outlet of the conventional double-working overflow valve, the invention has the following technical problems: the overpressure protection overflow valve can reduce oil pressure in the oil outlet and avoid affecting normal operation of equipment connected with the oil outlet.
The utility model provides an overpressure protection overflow valve, includes valve main part, main valve core, main valve spring, guide's case, guide's spring and adjusting screw, still including the pressure release subassembly that is used for carrying out the pressure release to the oil pressure in the oil-out, the pressure release subassembly sets up valve main part is kept away from first oil pocket one side, the pressure release subassembly is located between oil-out and the oil feed chamber, be provided with the throat elastic tube in the oil guide cavity, be close to in the oil guide cavity oil-out one side swivelling joint has the dwang, the throat elastic tube is close to swivelling lever one side wears the elastic stay cord of cover along the circumferencial direction has a plurality of circles, elastic stay cord tip with the dwang is close to throat elastic tube one side fixed connection, the pressure release piece is close to oil-out one side with be equipped with between the dwang be used for driving the throat elastic tube carries out the drive assembly of throat.
Further stated, the pressure release assembly comprises a diversion channel, the diversion channel is arranged on one side of the valve main body away from the first oil cavity, the diversion channel is positioned between the oil outlet and the oil inlet cavity, the diversion channel is communicated with the oil guide cavity, a guide plate is arranged in the diversion channel, the guide plate is connected with a pressure release piece for blocking the diversion channel in a sliding manner, and a first spring is arranged between the pressure release piece and the guide plate.
Further stated, the said driving assembly includes the gear, the said gear rigid coupling is in one side that the said swivelling lever is close to the said necking spring barrel, the said pressure relief piece is close to one side fixedly connected with L-shaped movable rod of the said oil outlet, the said L-shaped movable rod is connected with said valve main body slidably, the said L-shaped movable rod top rigid coupling has racks, said racks with said gear engagement.
Further, the novel oil drain valve further comprises an oil drain channel, the oil drain channel is arranged on one side, far away from the oil outlet, of the valve main body, the oil drain channel is communicated with the second oil cavity, a circular sleeve is connected in the oil drain channel in a sliding mode, the circular sleeve is provided with symmetrically arranged oil outlet holes, an opening and closing component used for opening and closing the oil outlet holes is arranged between the circular sleeve and the oil drain channel, a release component used for releasing the circular sleeve is arranged on one side, close to the oil drain channel, of the valve main body, a clamping component is arranged on one side, close to the oil drain channel, of the valve main body, and is used for clamping the release component, and a limiting component used for limiting the release component is arranged between one side, close to the valve main body.
Further stated, the opening and closing assembly comprises a double-hole oil baffle, the double-hole oil baffle is rotatably connected in the circular sleeve, a threaded rod is fixedly connected to the bottom of the double-hole oil baffle, the oil drainage channel is close to one side of the threaded rod and fixedly connected with a poking rod, the poking rod is matched with threads on the threaded rod, and a second spring is connected between the bottom of the double-hole oil baffle and the valve main body.
Further stated, the release assembly comprises a blocking frame, the blocking frame is slidably connected to one side of the valve main body, which is close to the circular sleeve, the blocking frame is in contact with the bottom of the circular sleeve, the blocking frame is close to one side of the circular sleeve, which is provided with symmetrically arranged arc grooves, the arc grooves are matched with the circular sleeve, the blocking frame is close to one side of the main valve core, which is provided with a blocking sheet, and a third spring is arranged between the blocking sheet and the valve main body.
Further stated, the clamping assembly comprises a clamping piece, the clamping piece is connected to one side of the valve main body, which is close to the circular sleeve, and the blocking frame is provided with symmetrically arranged clamping holes on one side, which is close to the clamping piece, of the blocking frame, and the clamping piece is matched with the clamping holes in a clamping way.
Further stated, the limiting component comprises a limiting rod, the limiting rod is connected to one side of the valve main body, which is close to the blocking piece, the limiting rod is in extrusion fit with the blocking piece, a blocking chute is arranged on one side, which is far away from the third spring, of the limiting rod, a wedge block is connected to one side, which is close to the blocking chute, of the valve main body, and the wedge block is in extrusion fit with the blocking chute.
Further, the valve further comprises a reinforcing plate for reinforcing the valve body, the symmetrically arranged reinforcing plates are fixed at the bottom of the valve body, and a plurality of fixing holes are formed in the reinforcing plate.
Further stated, the end of the adjusting screw is provided with an adjusting block.
The beneficial effects of the invention are as follows: 1. when the oil pressure in the oil inlet cavity is greater than the elasticity of the main valve spring, the pressure oil can enter the diversion channel, the pressure relief assembly is opened, the necking elastic cylinder automatically contracts through the driving assembly, so that the pressure oil can be reduced to flow out from the oil outlet, the pressure oil is diverted through the diversion channel, the oil pressure of the oil outlet and the oil inlet cavity is reduced, equipment connected with the oil outlet is protected, and normal operation of the equipment connected with the oil outlet is avoided.
2. When the oil pressure is continuously increased, the main valve core is driven to move upwards to release the release assembly, and after the release assembly is released by the limiting assembly, the oil pressure entering the oil drainage channel extrudes the circular sleeve, and the oil pressure can be subjected to secondary pressure relief through the oil drainage channel by opening the oil outlet, so that connected equipment is further protected.
3. According to the invention, the round sleeve is extruded by oil pressure, the round sleeve drives the double-hole oil baffle plate and the threaded rod to move downwards, and the oil outlet hole is automatically opened under the action of the toggle rod, so that the oil pressure is relieved through the oil outlet hole, and the equipment is protected.
4. After the main valve core moves upwards to extrude the wedge block, the wedge block drives the limiting rod to move upwards to release the blocking piece, and oil pressure can extrude the blocking piece, so that the circular sleeve is released.
Drawings
Fig. 1 is a schematic perspective view of a valve body, a reinforcing plate and a fixing hole according to the present invention.
Fig. 2 is a perspective structural cross-sectional view of the valve body of the present invention.
Fig. 3 is a perspective cross-sectional view of the drive assembly of the present invention.
Fig. 4 is a schematic perspective view of the parts such as the necking elastic tube, the rotating rod and the elastic pull rope.
Fig. 5 is a schematic perspective view of the opening and closing assembly, the releasing assembly and the clamping assembly according to the present invention.
Fig. 6 is a schematic perspective view of the release assembly and the opening and closing assembly of the present invention.
Fig. 7 is a schematic perspective view of the circular sleeve, the blocking frame and the blocking chute of the present invention.
Fig. 8 is a schematic perspective view of the oil outlet plate, the oil outlet hole, the double-hole oil baffle plate and other parts.
Fig. 9 is a schematic perspective view of the stop lever, blocking chute and wedge of the present invention.
In the above figures: 1: valve body, 2: oil inlet chamber, 3: main spool, 4: damping hole, 5: main valve spring, 6: first oil chamber, 7: second oil chamber, 8: pilot spool, 9: notch, 10: pilot spring, 11: adjusting screw, 12: oil guiding cavity, 13: oil outlet, 14: diversion channel, 15: deflector, 16: pressure relief piece, 17: first spring, 18: necking elastic barrel, 181: rotating lever, 182: elastic pull rope, 183: gear, 184: l-shaped travel bar, 185: rack, 19: oil drain channel, 191: circular sleeve, 192: oil outlet hole, 193: double-hole oil baffle, 194: second spring, 195: threaded rod, 196: toggle lever, 197: blocking frame, 198: third spring, 199: barrier sheet, 1910: arc groove, 1911: card hole, 1912: clamping piece, 1913: limit lever, 1914: blocking chute, 1915: wedge block, 20: reinforcing plate, 21: and a fixing hole.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which currently preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1: 1-4, an overpressure protection overflow valve comprises a valve main body 1, a main valve core 3, a main valve spring 5, a pilot valve core 8, a pilot spring 10, an adjusting screw 11 and an oil guide cavity 12, wherein an oil inlet cavity 2 is arranged in the middle of the lower part of the valve main body 1, the main valve core 3 is connected in the oil inlet cavity 2 in a sliding manner, a damping hole 4 is arranged in the middle of the main valve core 3, the main valve spring 5 is arranged between the top of the main valve core 3 and the top of the oil inlet cavity 2, a first oil cavity 6 is arranged at the left upper part of the valve main body 1, a second oil cavity 7 is arranged at the right upper part of the valve main body 1, the left lower part of the second oil cavity 7 is communicated with the upper part of the oil inlet cavity 2, the left part of the second oil cavity 7 is communicated with the right part of the first oil cavity 6, the pilot valve core 8 is connected in the first oil cavity 6 in a sliding manner, notches 9 are formed on the upper side and the lower side of the right part of the pilot valve core 8, an adjusting screw 11 is connected to the left upper part of the valve body 1 in a threaded mode, the adjusting screw 11 is connected with the pilot valve core 8 in a sliding mode, an adjusting block which is convenient to rotate the adjusting screw 11 is arranged at the left end of the adjusting screw 11, a pilot spring 10 is connected between the right part of the pilot valve core 8 and the adjusting screw 11, the pilot spring 10 is wound on the pilot valve core 8, the right end of the adjusting screw 11 is connected with the left end of the pilot valve core 8 in a rotating mode, an oil guide cavity 12 is arranged at the left lower part in the valve body 1, the left upper part of the oil guide cavity 12 is communicated with the first oil cavity 6, the right part of the oil guide cavity 12 is communicated with the oil inlet cavity 2, an oil outlet 13 is arranged at the left lower part in the valve body 1, the oil outlet 13 is positioned below the oil guide cavity 12, the oil outlet 13 is communicated with the oil guide cavity 12, and the oil guide device further comprises a pressure relief assembly, the pressure relief assembly is arranged at the lower part in the valve main body 1 and is positioned between the oil outlet 13 and the oil inlet cavity 2, a necking elastic tube 18 is arranged in the oil guide cavity 12, the left side in the oil guide cavity 12 is rotationally connected with a rotating rod 181, two circles of elastic pull ropes 182 are sleeved on the left side of the necking elastic tube 18 along the circumferential direction, the end parts of the elastic pull ropes 182 are fixedly connected with the right front part of the rotating rod 181, and a driving assembly is arranged between the left upper side of the pressure relief piece 16 and the right part of the rotating rod 181 and is used for driving the necking elastic tube 18 to shrink.
As shown in fig. 2, the pressure relief assembly comprises a diversion channel 14, the diversion channel 14 is arranged at the left lower part in the valve main body 1, the upper part of the diversion channel 14 is communicated with the oil guide cavity 12, the diversion channel 14 is positioned between the oil outlet 13 and the oil inlet cavity 2, the channel at the upper part of the diversion channel 14 is narrower than the channel at the lower part, a guide plate 15 is arranged in the channel at the lower part of the diversion channel 14, the guide plate 15 is connected with the pressure relief piece 16 in a sliding manner, the diameter of the upper part of the pressure relief piece 16 is just consistent with the diameter of the channel at the upper part of the diversion channel 14, the upper part of the pressure relief piece 16 is used for blocking the channel at the upper part of the diversion channel 14, and a first spring 17 is arranged between the pressure relief piece 16 and the guide plate 15.
As shown in fig. 3 and 4, the driving assembly includes a gear 183, the gear 183 is fixedly connected to the right portion of the rotating rod 181, an L-shaped moving rod 184 is fixedly connected to the upper left portion of the pressure release member 16, the L-shaped moving rod 184 is slidably connected to the valve main body 1, a rack 185 is fixedly connected to the top of the L-shaped moving rod 184, and the rack 185 is meshed with the gear 183.
When the overpressure protection overflow valve is used, the oil inlet cavity 2 is connected with the outlet of the hydraulic pump, the oil outlet 13 is connected with other equipment, the pressure of pressure oil entering the oil inlet cavity 2 is limited differently according to the application scene of the equipment system, the preset pressure of the pilot spring 10 needs to be regulated at the moment, the regulating block is manually screwed by people to drive the regulating screw 11 to rotate, the pilot valve core 8 and the pilot spring 10 can be driven to move left and right, the compression degree of the pilot spring 10 can be influenced by the left and right movements of the pilot valve core 8 and the pilot spring 10, the compression degree of the pilot valve core 8 and the pilot spring 10 is larger, the compression degree of the pilot spring 10 is larger, the preset pressure formed by the pilot spring 10 on the second oil cavity 7 is larger, and the preset pressure formed by the pilot spring 10 on the oil inlet cavity 2 is larger because the second oil cavity 7 is communicated with the oil inlet cavity 2, otherwise, the compression degree of the pilot spring 10 is smaller, and the preset pressure formed by the oil inlet cavity 2 is smaller.
After the preset pressure is regulated, the overpressure protection overflow valve can work normally, pressure oil enters the oil inlet cavity 2, the pressure oil enters the second oil cavity 7 through the damping hole 4, when the oil pressure in the second oil cavity 7 is larger than the preset pressure, the pressure oil pushes the pilot valve core 8 leftwards, the pilot spring 10 is compressed, the pilot valve core 8 leftwards moves to open the notch 9, the pressure oil enters the first oil cavity 6 through the notch 9 and then flows out of the oil outlet 13 through the oil guide cavity 12, when the oil pressure entering the oil inlet cavity 2 is slowly larger than the elastic force of the main valve spring 5, the oil pressure pushes the main valve core 3 upwards, the main valve spring 5 is compressed, after the main valve core 3 moves upwards to open a passage between the oil guide cavity 12 and the oil inlet cavity 2, the pressure oil directly enters the oil guide cavity 12 to release the inside of the oil inlet cavity 2, and after the pressure oil enters the oil guide cavity 12, the oil pressure of the oil outlet 13 can be reduced through the diversion channel 14, after the pressure oil enters the diversion channel 14, the oil pressure presses the pressure release piece 16 downwards, the first spring 17 is compressed, after the upper part of the pressure release piece 16 moves downwards to the channel at the lower part of the diversion channel 14, gaps appear between the pressure release piece 16 and the channel at the lower part of the diversion channel 14, the pressure oil can be discharged downwards through the gaps, when the pressure release piece 16 moves downwards, the L-shaped moving rod 184 and the rack 185 are driven to move downwards, the rack 185 moves downwards and rotates through the gear 183, the gear 183 drives the rotating rod 181 to rotate so as to tighten the elastic pull rope 182, thus the left part of the necking elastic tube 18 automatically contracts, the pressure oil flowing out from the oil outlet 13 can be reduced, the pressure oil is shunted through the diversion channel 14 so as to reduce the oil pressure at the oil outlet 13 and the oil inlet cavity 2, not only can protect the oil outlet 13 and the oil inlet cavity 2, but also can protect equipment connected with the oil outlet 13, and the normal operation of the equipment connected with the oil outlet 13 is prevented from being influenced.
When the oil pressure of the pressure oil entering the oil inlet cavity 2 is slowly reduced and smaller than the elastic force of the main valve spring 5, the main valve core 3 is driven to move downwards to block the passage between the oil guide cavity 12 and the oil inlet cavity 2 under the action of the main valve spring 5, the pressure oil stops extruding the pressure release piece 16, the pressure release piece 16 is driven to move upwards to reset under the action of the first spring 17, the pressure release piece 16 moves upwards to drive the L-shaped moving rod 184 and the rack 185 to move upwards, the rack 185 is reversed through the gear 183, the gear 183 drives the rotating rod 181 to rotate to loosen the elastic pull rope 182, the left part of the necking elastic cylinder 18 is automatically flared, and when the oil pressure inside the second oil cavity 7 is smaller than the preset pressure, the pilot spring 10 drives the pilot valve core 8 to move rightwards to reset.
Embodiment 2, on the basis of embodiment 1, as shown in fig. 5 and 6, the valve further comprises a drain channel 19, the drain channel 19 is arranged at the right lower part in the valve main body 1, the upper part of the drain channel 19 is communicated with the right lower part of the second oil cavity 7, a circular sleeve 191 is connected in the drain channel 19 in a sliding manner, oil outlets 192 are formed in the left side and the right side of the circular sleeve 191, an opening and closing component for opening and closing the oil outlets 192 is arranged between the circular sleeve 191 and the drain channel 19, a release component for releasing the circular sleeve 191 is arranged at the right lower side in the valve main body 1, a clamping component is arranged at one side, close to the drain channel 19, of the valve main body 1, and is used for clamping the release component, and a limiting component for limiting the release component is arranged in the valve main body 1.
If the oil pressure in the oil inlet cavity 2 is continuously increased, the oil pressure continuously pushes the main valve core 3 upwards, when the main valve core 3 moves upwards and the release component is separated, and when the main valve core 3 continues to move upwards to extrude the release component, the release component is upwards moved to release, the release component is extruded by the oil pressure, the release component moves rightwards to release the circular sleeve 191, at the moment, the circular sleeve 191 is driven to move downwards under the action of the opening and closing component, the oil outlet hole 192 is opened, and at the moment, the pressure oil in the second oil cavity 7 can be downwards discharged through the oil discharge channel 19 and the oil outlet hole 192, so that secondary pressure relief can be carried out, the oil pressure at the positions of the oil outlet 13 and the oil inlet cavity 2 is reduced, the protection of equipment connected with the oil outlet 13 is realized, and the normal operation of the equipment connected with the oil outlet 13 is prevented from being influenced; if the oil pressure in the oil inlet cavity 2 slowly drops, the main valve core 3 will slowly move downwards to reset, the main valve core 3 will release the limiting assembly, the oil pressure in the oil drain channel 19 also slowly drops, under the action of the opening and closing assembly, the circular sleeve 191 will move upwards to reset, and the oil outlet 192 is closed.
As shown in fig. 5, 6 and 8, the opening and closing assembly comprises a double-hole oil baffle 193, the double-hole oil baffle 193 is rotatably connected in the circular sleeve 191, a threaded rod 195 is fixedly connected to the bottom of the double-hole oil baffle 193, a toggle rod 196 is fixedly connected to the lower left part in the oil drain channel 19, the toggle rod 196 is in threaded fit with the threaded rod 195, and a second spring 194 is connected between the bottom of the double-hole oil baffle 193 and the valve main body 1.
As shown in fig. 5, 6 and 7, the release assembly comprises a blocking frame 197, the blocking frame 197 is slidably connected to the right lower side in the valve main body 1, the right part of the blocking frame 197 penetrates into the oil drain channel 19, the right part of the blocking frame 197 contacts with the bottom of the circular sleeve 191, the front side and the rear side of the right lower part of the blocking frame 197 are both provided with arc grooves 1910, the arc grooves 1910 are matched with the circular sleeve 191, the left upper part of the blocking frame 197 is provided with a blocking piece 199, and a third spring 198 is arranged between the right part of the blocking piece 199 and the valve main body 1.
As shown in fig. 5 and 6, the positioning component includes a positioning member 1912, the positioning member 1912 is slidably connected to one side of the valve main body 1 near the circular sleeve 191, two sides of the right lower portion of the blocking frame 197 are respectively provided with a clamping hole 1911, and the positioning member 1912 is in clamping fit with the clamping holes 1911.
As shown in fig. 5 and 9, the limiting component comprises a limiting rod 1913, the limiting rod 1913 is slidably connected in the valve main body 1, the limiting rod 1913 is located on the right side of the main valve core 3, the limiting rod 1913 is located on the left side of the oil drain channel 19, the lower portion of the limiting rod 1913 is in extrusion fit with the upper portion of the blocking piece 199, a blocking chute 1914 is arranged on the upper portion of the limiting rod 1913, and a wedge block 1915 is slidably connected to one side, close to the blocking chute 1914, of the valve main body 1, and the wedge block 1915 is in extrusion fit with the blocking chute 1914.
When the main valve core 3 moves upwards and contacts with the wedge block 1915, the wedge block 1915 is pressed rightwards, the wedge block 1915 moves rightwards and presses the blocking chute 1914 to drive the limiting rod 1913 to move upwards, after the limiting rod 1913 moves upwards to release the blocking piece 199, and after the main valve core 3 moves upwards and is no longer blocked at the left part of the blocking piece 199, the blocking piece 199 is pushed rightwards by the oil pressure, the third spring 198 is compressed, the blocking piece 199 pushes rightwards and drives the blocking frame 197 to move rightwards, the blocking frame 197 moves rightwards and drives the arc groove 1910 and the clamping hole 1911 to move rightwards, after the clamping hole 1911 moves rightwards and the bottom of the clamping piece 1912 is overlapped, the clamping piece 1912 is pressed downwards by the oil pressure, the clamping piece 1912 is automatically clamped into the clamping hole 1911, thus the blocking frame 197 can keep a rightwards moving state, and when the front side edge and rear side edge of the arc groove 1910 and the round sleeve 191 are engaged, the blocking frame 197 does not block the round sleeve 191 any more, at this time, the oil pressure will extrude the circular sleeve 191 downwards, the circular sleeve 191 downwards moves to drive the double-hole oil baffle 193 and the threaded rod 195 to downwards move, the second spring 194 is compressed, after the threaded rod 195 downwards moves and the poking rod 196 contacts, the poking rod 196 drives the threaded rod 195 to rotate, the threaded rod 195 rotates to drive the double-hole oil baffle 193 to rotate, the double holes of the double-hole oil baffle 193 are just communicated with the oil outlet 192, the oil outlet 192 is opened, the pressure oil is automatically discharged downwards, thus the secondary pressure relief can be realized, the oil pressure of the oil outlet 13 and the oil inlet cavity 2 is reduced, the equipment connected with the oil outlet 13 is protected, the equipment connected with the oil outlet 13 is prevented from being influenced to normally operate, when the oil pressure slowly descends, the main valve core 3 downwards moves to reset, the oil pressure does not squeeze the blocking piece 199, at this time, the blocking piece 1912 locks the blocking frame 197, so make and block the frame 197 and can not move to the left, after the oil pressure of the oil drain channel 19 descends, under the effect of the second spring 194, drive round cover 191, double-hole oil baffle 193 and threaded rod 195 to move upward and reset, under the effect of toggle rod 196, then drive threaded rod 195 to reverse and reset, make double-hole oil baffle 193 close oil outlet 192 again, after round cover 191 moves upward and extrudes clamping piece 1912, drive clamping piece 1912 to move upward and break away from clamping hole 1911, can loosen and block the frame 197, so under the effect of the third spring 198, just can drive and block frame 197 and blocking piece 199 to move left and reset, block frame 197 supports round cover 191 again, make oil drain channel 19 closed, and limit rod 1913 then moves down because of own gravity and resets and limits the right part of blocking piece 199 again, wedge 1915 moves left and resets.
As shown in fig. 1, the valve further comprises a reinforcing plate 20 for reinforcing the valve main body 1, the reinforcing plate 20 is respectively fixed on the front side and the rear side of the bottom of the valve main body 1, two fixing holes 21 are formed in the left part of the reinforcing plate 20, and a fixing hole 21 is formed in the right part of the reinforcing plate 20; when the oil feed chamber and the outlet of the hydraulic pump are connected, the bolts are passed through the fixing holes 21, and the reinforcing plate 20 is fixed at the outlet of the hydraulic pump by the bolts, so that the fixed valve body 1 can be reinforced.
While the invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.
Claims (10)
1. The utility model provides an overpressure protection overflow valve, is including valve main part (1), main valve core (3), main valve spring (5), guide's case (8), guide's spring (10) and adjusting screw (11), characterized by: the oil pressure in oil-out (13) is still including being used for carrying out the pressure release subassembly of pressure release, the pressure release subassembly sets up valve main part (1) are kept away from first oil pocket (6) one side, the pressure release subassembly is located between oil-out (13) and oil feed chamber (2), be provided with throat elasticity section of thick bamboo (18) in oil guide cavity (12), be close to in oil guide cavity (12) one side rotation is connected with dwang (181), throat elasticity section of thick bamboo (18) are close to dwang (181) one side is worn to overlap along the circumferencial direction has elasticity stay cord (182) of a plurality of circles, elasticity stay cord (182) tip with dwang (181) are close to throat elasticity section of thick bamboo (18) one side fixed connection, pressure release piece (16) are close to oil-out (13) one side with be equipped with between dwang (181) and be used for driving the drive assembly that throat elasticity section of thick bamboo (18) carries out the throat.
2. An overpressure protection overflow valve as set forth in claim 1 wherein: the pressure release subassembly is including reposition of redundant personnel passageway (14), reposition of redundant personnel passageway (14) set up valve main part (1) are kept away from first oil pocket (6) one side, reposition of redundant personnel passageway (14) are located oil-out (13) with advance between oil chamber (2), reposition of redundant personnel passageway (14) with lead oily cavity (12) intercommunication, be equipped with deflector (15) in reposition of redundant personnel passageway (14), sliding connection has on deflector (15) is used for blocking reposition of redundant personnel passageway (14) pressure release piece (16), pressure release piece (16) with be equipped with first spring (17) between deflector (15).
3. An overpressure protection overflow valve as set forth in claim 2, wherein: the driving assembly comprises a gear (183), the gear (183) is fixedly connected to one side, close to the necking elastic cylinder (18), of the rotating rod (181), an L-shaped moving rod (184) is fixedly connected to one side, close to the oil outlet (13), of the pressure release piece (16), the L-shaped moving rod (184) is slidably connected with the valve main body (1), a rack (185) is fixedly connected to the top of the L-shaped moving rod (184), and the rack (185) is meshed with the gear (183).
4. An overpressure protection overflow valve as set forth in claim 3 wherein: still including drain channel (19), drain channel (19) set up valve main part (1) are kept away from one side of oil-out (13), drain channel (19) and second oil pocket (7) intercommunication, sliding connection has circular cover (191) in drain channel (19), circular cover (191) are equipped with oil outlet (192) that the symmetry set up, circular cover (191) with be equipped with between drain channel (19) be used for with oil outlet (192) open and shut the subassembly that opens and shuts, valve main part (1) are close to drain channel (19) one side is equipped with and is used for releasing the release subassembly of circular cover (191), valve main part (1) are close to drain channel (19) one side is equipped with the screens subassembly, the screens subassembly is used for right release subassembly carries out the screens, valve main part (1) are close to be equipped with between main valve core (3) one side be used for right release subassembly carries out spacing subassembly.
5. An overpressure protection relief valve as set forth in claim 4 wherein: the opening and closing assembly comprises a double-hole oil baffle (193), the double-hole oil baffle (193) is rotationally connected in the circular sleeve (191), a threaded rod (195) is fixedly connected to the bottom of the double-hole oil baffle (193), a toggle rod (196) is fixedly connected to one side of the threaded rod (195) close to an oil drainage channel (19), threads on the toggle rod (196) and the threaded rod (195) are matched, and a second spring (194) is connected between the bottom of the double-hole oil baffle (193) and the valve main body (1).
6. An overpressure protection relief valve as set forth in claim 5, wherein: the release assembly comprises a blocking frame (197), the blocking frame (197) is connected to one side, close to the circular sleeve (191), of the valve main body (1), the blocking frame (197) is in contact with the bottom of the circular sleeve (191), the blocking frame (197) is close to an arc-shaped groove (1910) symmetrically arranged on one side of the circular sleeve (191), the arc-shaped groove (1910) is matched with the circular sleeve (191), a blocking piece (199) is arranged on one side, close to the main valve core (3), of the blocking frame (197), and a third spring (198) is arranged between the blocking piece (199) and the valve main body (1).
7. An overpressure protection relief valve as set forth in claim 6, wherein: the clamping assembly comprises a clamping piece (1912), the clamping piece (1912) is connected to one side, close to the circular sleeve (191), of the valve main body (1), a blocking frame (197) is close to one side, close to the clamping piece (1912), of the blocking frame, symmetrically arranged clamping holes (1911) are formed in one side, and the clamping piece (1912) is matched with the clamping holes (1911) in a clamping mode.
8. An overpressure protection overflow valve as set forth in claim 7 wherein: the limiting assembly comprises a limiting rod (1913), the limiting rod (1913) is connected to the valve body (1) in a sliding mode and is close to one side of the blocking piece (199), the limiting rod (1913) is in extrusion fit with the blocking piece (199), the limiting rod (1913) is far away from one side of the third spring (198) and is provided with a blocking chute (1914), the valve body (1) is close to one side of the blocking chute (1914) and is connected with a wedge block (1915) in a sliding mode, and the wedge block (1915) is in extrusion fit with the blocking chute (1914).
9. An overpressure protection overflow valve as set forth in claim 8 wherein: the valve further comprises reinforcing plates (20) used for reinforcing the valve main body (1), the symmetrically arranged reinforcing plates (20) are fixed at the bottom of the valve main body (1), and a plurality of fixing holes (21) are formed in the reinforcing plates (20).
10. An overpressure protection overflow valve as set forth in claim 9 wherein: an adjusting block is arranged at the end part of the adjusting screw rod (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311205186.XA CN116951145B (en) | 2023-09-19 | 2023-09-19 | Overpressure protection overflow valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311205186.XA CN116951145B (en) | 2023-09-19 | 2023-09-19 | Overpressure protection overflow valve |
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| CN116951145A true CN116951145A (en) | 2023-10-27 |
| CN116951145B CN116951145B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311205186.XA Active CN116951145B (en) | 2023-09-19 | 2023-09-19 | Overpressure protection overflow valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117146022A (en) * | 2023-11-01 | 2023-12-01 | 南通沃特力机械制造有限公司 | Short-stroke water pump pressure regulating valve |
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| CN216009060U (en) * | 2020-11-26 | 2022-03-11 | 天津福得士阀门有限公司 | Pilot-operated overflow valve capable of adjusting oil outlet flow |
| CN116428233A (en) * | 2023-04-03 | 2023-07-14 | 宁波诚天液压有限公司 | Double-working-operation overflow valve |
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| CN117146022A (en) * | 2023-11-01 | 2023-12-01 | 南通沃特力机械制造有限公司 | Short-stroke water pump pressure regulating valve |
| CN117146022B (en) * | 2023-11-01 | 2023-12-26 | 南通沃特力机械制造有限公司 | Short-stroke water pump pressure regulating valve |
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| Publication number | Publication date |
|---|---|
| CN116951145B (en) | 2023-12-01 |
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