CN201753790U - Safety valve for multi-way valve - Google Patents

Safety valve for multi-way valve Download PDF

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Publication number
CN201753790U
CN201753790U CN2010202629015U CN201020262901U CN201753790U CN 201753790 U CN201753790 U CN 201753790U CN 2010202629015 U CN2010202629015 U CN 2010202629015U CN 201020262901 U CN201020262901 U CN 201020262901U CN 201753790 U CN201753790 U CN 201753790U
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China
Prior art keywords
valve
valve seat
cavity
pressure
way valve
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Expired - Lifetime
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CN2010202629015U
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Chinese (zh)
Inventor
蔡志方
游亦利
刘汉斌
李春光
梁昌霞
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ZHEJIANG STRONGER HYDRAULIC CO Ltd
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Priority to CN2010202629015U priority Critical patent/CN201753790U/en
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Publication of CN201753790U publication Critical patent/CN201753790U/en
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Abstract

The utility model provides a safety valve for a multi-way valve, which belongs to the technical field of engineering elements and resolves the problem that the existing safety valve is greatly affected by pressure fluctuation of the multi-way valve, and blockage is easy to be caused when a conical valve slides along the inner wall of a valve sleeve. The safety valve for a multi-way valve comprises a connecting sleeve, a valve seat II and a valve seat I with a through cavity, a plunger which divides the through cavity into an inner cavity and an outer cavity is arranged in the valve seat I, the valve seat I is provided with a pressure relief passage communicated with the outer cavity, a resetting spring is arranged between the plunger and the valve seat II, the valve seat II is fixedly connected onto the connecting sleeve through a screw-in sleeve with a pressure adjusting cavity, the plunger is provided with a damping passage I capable of connecting the inner cavity with the outer cavity, the valve seat II is provided with a damping passage II capable of connecting the inner cavity with the pressure adjusting cavity, and the screw-in sleeve is provided with a pressure adjusting mechanism capable of blocking the damping passage II. The safety valve for a multi-way valve adopts a two-stage damping hole structure, effectively reduces influence caused by pressure fluctuation of hydraulic oil in a multi-way valve oil circuit system, and increases stability.

Description

A kind of multi-way valve safety valve
Technical field
The utility model belongs to the engineering element technical field, relates to a kind of hydrovalve, particularly a kind of multi-way valve safety valve.
Background technique
Multi-way valve adopts unified modular design, and the user will be according to functional requirement valve body is carried out different combinations, and is simple and reliable.It is applicable to engineering machinery, the mine, and metallurgy, boats and ships, industries such as medicine, for example, multi-way valve is exactly important parts in the excavator.Chinese patent literature is disclosed a kind of multi-way valve [China Patent No.: ZL200720174242.8 once just; Notice of authorization number: CN201128923Y], comprise the multi-disc valve body and with valve body valve rod, pilot valve, safety valve etc. one to one.Wherein safety valve is an element important in the multi-way valve, and the overall performance of multi-way valve is had very big influence.
Pertinent literature such as the just once disclosed a kind of integral multi-way valve safety valve [China Patent No.: 96248551.9 of Chinese patent literature about safety valve; Notice of authorization number: CN2289104Y], comprise pressure regulating screw, gland spiral shell, line connecting sleeve, valve pocket, plunger pressure adjusting spring poppet valve seat, poppet valve and spring, cone valve and be positioned at the guiding valve of a no center damping through hole of cone valve.Hydraulic oil flow is through the cone valve of safety valve and the annular space between the guiding valve; and when hydraulic fluid pressure is too high in the multi-way valve; the hydraulic oil of P mouth can be let out the T oil back chamber rapidly; play the purpose of protection multi-way valve thus; but also exist and be subjected to that the multi-way valve pressure surge influences greatly, cone valve when valve sleeving inner wall slides catching phenomenon takes place easily, and then influence the problem of multi-way valve proper functioning.
Summary of the invention
The purpose of this utility model is to have the problems referred to above at existing technology, has proposed the high multi-way valve safety valve of a kind of oil circuit stability, utilizes the safety valve can reduce the pressure surge of multi-way valve oil-way system, can play the function of unidirectional repairing simultaneously.
The purpose of this utility model can realize by following technical proposal: a kind of multi-way valve safety valve, comprise connecting sleeve, have the valve seat one of cavity and be connected valve seat two on valve seat one cavity the inner, in valve seat one, be provided with and slide and cavity is divided into the plunger of inner chamber and exocoel along the cavity inwall; Have the pressure release passage that communicates with exocoel on the valve seat one; Be provided with Returnning spring between described plunger and the valve seat two, be fixed with screw-in cover on the described connecting sleeve with pressure regulating cavity, above-mentioned valve seat two is connected in to screw in and puts, and it is characterized in that, has the damp channel one that connects above-mentioned inner chamber and exocoel on the described plunger; Have the damp channel two that connects above-mentioned inner chamber and pressure regulating cavity on the described valve seat two; Described screw-in put establish can shutoff damp channel two pressure-regulating device.
When the safety valve used, connecting sleeve was fixed on the valve body of multi-way valve, and the exterior edge face of valve seat is resisted against on the valve body of multi-way valve and forms sealing, and corresponding oil duct is interconnected simultaneously.When the pressure of hydraulic oil during, be in the state of blocking between damp channel two and the pressure regulating cavity less than the pre-compression force of pressure-regulating device.Plunger this moment effect lower plunger of hydraulic fluid pressure in Returnning spring and inner chamber makes and also is in the state of blocking between exocoel and the pressure release passage, and thus, P oil suction chamber and oil back chamber T are in the partition state.When the pressure of hydraulic oil during greater than the pre-compression force of pressure-regulating device, be in connected state between damp channel two and the pressure regulating cavity, at this moment, flow through successively damp channel two, pressure regulating cavity, communication passage, gap one, gap two of a part of hydraulic oil in the inner chamber enters oil back chamber T.Because the flowing of hydraulic oil caused in the inner chamber hydraulic fluid pressure to reduce rapidly and was lower than hydraulic fluid pressure in the exocoel this moment.And when the suffered pressure in plunger outer end greater than the pressure of hydraulic fluid pressure in Returnning spring and the inner chamber and; plunger axis makes to moving to the inner of valve seat one and also is in connected state between exocoel and the pressure release passage; thus; hydraulic oil in the P oil suction chamber directly enters oil back chamber T by exocoel, pressure release passage successively; and then finish the pressure off-load, protect the safety of multi-way valve.In the multi-way valve working procedure, when causing the pressure of oil suction chamber P to be lower than the pressure of oil back chamber T when producing emptying phenomenon, because the effective active area of valve seat outer end is greater than the effective active area of the inner, cause acting in the oil back chamber T power of valve seat outer end greater than acting on inner power, thereby can make valve seat break away from valve body, make the fluid in the oil back chamber T add in the P oil suction chamber, realize the function of unidirectional repairing by the valve port between valve seat and valve body.
The hydraulic oil pressure fluctuation has improved the stability of safety valve to the influence of safety valve in the multi-way valve oil-way system because safety valve employing two-stage damping hole structure has effectively reduced.
With in the safety valve, described damp channel one and damp channel two include damping hole portion and are positioned at the interconnecting part at damping hole portion two ends at above-mentioned multi-way valve.Damping function plays in damping hole portion, the dynamic stability of raising system/local element.
With in the safety valve, the diameter of described damping hole portion is 0.6~1mm at above-mentioned multi-way valve.
With in the safety valve, have some the axial also annular balancing slits of column distribution at above-mentioned multi-way valve on the described plunger outer side wall.The balance that balancing slit has been used for improving the plunger motion process is set, has effectively prevented the catching phenomenon of plunger.
With in the safety valve, the quantity of described annular balancing slit is 2~5 at above-mentioned multi-way valve.
Use in the safety valve at above-mentioned multi-way valve, described pressure-regulating device comprises lifting head that can shutoff damp channel two interconnecting parts and is threaded in and screws in the regulator bolts that puts, be provided with pressure adjusting spring between lifting head and the regulator bolts, one end of pressure adjusting spring links to each other with lifting head, and the other end links to each other with regulator bolts.
At above-mentioned multi-way valve with in the safety valve, described lifting head comprise tapered be resisted against the sealed department on damp channel two interconnecting parts and be column and penetrate in the spring the positioning part.
Compared with prior art, this multi-way valve adopts two-stage damping hole structure to reduce effectively that the hydraulic oil pressure fluctuation has improved the stability of safety valve to the influence of safety valve in the multi-way valve oil-way system with safety valve.Have some the axial also annular balancing slits of column distribution on the plunger outer side wall in the safety valve, the balance that balancing slit has been used for improving the plunger motion process is set, effectively prevented the catching phenomenon of plunger.Valve seat one in the safety valve can and then make the end face of valve seat one break away from the valve body of multi-way valve along valve seat two axial motions, can make the hydraulic oil and then the oil suction chamber of oil back chamber thus, has realized the function of unidirectional repairing, improves the stationarity of multi-way valve entire system.
Description of drawings
Fig. 1 is the sectional structure schematic representation of this multi-way valve with safety valve.
Fig. 2 is the structure for amplifying schematic representation of A portion among Fig. 1.
Fig. 3 is the structure for amplifying schematic representation of B portion among Fig. 1.
Among the figure, 1, connecting sleeve; 2, screw in cover; 21, communication passage; 22, pressure regulating cavity; 3, valve seat two; 31, damp channel two; 31a, interconnecting part; 31b, damping hole portion; 4, valve seat one; 41, exocoel; 42, inner chamber; 43, pressure release passage; 44, compress face; 5, Returnning spring; 6, plunger; 61, damp channel one; 61a, interconnecting part; 61b, damping hole portion; 62, annular balancing slit; 7, regulator bolts; 8, pressure adjusting spring; 9, lifting head; 91, sealed department; 92, positioning part; 10, O RunddichtringO; 11, the gap one; 12, the gap two; T, oil back chamber; P, oil suction chamber.
Embodiment
Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As shown in Figure 1, the safety valve comprises connecting sleeve 1, valve seat 1, valve seat 23, pressure-regulating device, screw-in cover 2, plunger 6, Returnning spring 5.
Specifically, connecting sleeve 1 in a tubular form and have the connecting thread that makes things convenient for the safety valve to link to each other with the multi-way valve valve body on its outer wall.
As shown in figures 1 and 3, valve seat 23 is positioned at connecting sleeve 1, connects by screwing in cover 2 between valve seat 23 and the connecting sleeve 1.Fix even by triangular groove between valve seat 23 and the screw-in cover 2; Screw between cover 2 and the connecting sleeve 1 by being threaded and being provided with O RunddichtringO 10 in the joint.Screw between cover 2 outer walls and connecting sleeve 1 inwall and have gap 1; Screw in the communication passage 21 that cover 2 has pressure regulating cavity 22 and is communicated with above-mentioned gap 1 and pressure regulating cavity 22.
As depicted in figs. 1 and 2, valve seat 1 has the cavity of axial perforation, and the inner of valve seat 1 is positioned at connecting sleeve 1 and is tightly connected with valve seat 23, and valve seat 1 can endwisely slip along valve seat 23; The outer end of valve seat 1 can lean with the valve of multi-way valve and above-mentioned cavity is communicated with the oil suction chamber of multi-way valve.Have gap 2 12 between the outer wall of valve seat 1 and connecting sleeve 1 inwall, gap 1 is connected with gap 2 12, also has the pressure release passage 43 that communicates with cavity on the valve seat 23; Pressure release passage 43 and gap 2 12 all communicate with the oil back chamber of multi-way valve.
Be provided with in the valve seat 1 and can slide and cavity is divided into the plunger 6 of inner chamber 42 and exocoel 41 along the cavity inwall, thus, exocoel 41 communicates with the oil suction chamber of multi-way valve; Axially have the damp channel 1 that connects above-mentioned inner chamber 42 and exocoel 41 on the plunger 6.Have 2~5 axial also annular balancing slits 62 of column distribution on plunger 6 outer side walls, present embodiment provides and has 4 axial also annular balancing slits 62 of column distribution on plunger 6 outer side walls, the balance that annular balancing slit 62 has been used for improving plunger 6 movement processes is set, has effectively prevented the catching phenomenon of plunger 6.Axially have on the valve seat 23 connect above-mentioned inner chamber 42 and pressure regulating cavity 22 damp channel 2 31, pressure-regulating device is arranged on and screws on the cover 2 and can shutoff damp channel 2 31.
Damp channel 1 and damp channel 2 31 include the 31b of damping hole portion (61b) and are positioned at the interconnecting part 31a (61a) at damping hole portion 31b (61b) two ends.The diameter of the 31b of damping hole portion (61b) is 0.6~1mm, and the diameter that present embodiment provides the 31b of damping hole portion (61b) is 0.8mm.Can get thus, hydraulic oil flow to pressure regulating cavity 22 from exocoel 41 need pass through damp channel 1 and damp channel 2 31 successively, adopt two-stage damping hole structure to reduce effectively that the hydraulic oil pressure fluctuation has improved the stability of safety valve to the influence of safety valve in the multi-way valve oil-way system.
Be provided with Returnning spring 5 between plunger 6 and the valve seat 23, an end of Returnning spring 5 is resisted against on the plunger 6, and the other end is resisted against on the valve seat 23.Have the face that compresses 44 that is obliquely installed with respect to the axle core on the outer end inwall of valve seat 1, above-mentioned plunger 6 is resisted against the face of compressing 44 and makes exocoel 41 and pressure release passage 43 be in blocking state under the effect of spring.The exterior edge face area of contour of plunger 6 is less than the interior edge face area of contour of plunger 6, and the area difference at two ends has guaranteed that plunger 6 effectively compresses valve seat 1, has eliminated the leakage of safety valve when system pressure during less than safety valve setting pressure.
Pressure-regulating device comprises lifting head 9 that can shutoff damp channel 2 31 interconnecting part 31a and is threaded in the regulator bolts 7 that screws on the cover 2, be provided with pressure adjusting spring 8 between lifting head 9 and the regulator bolts 7, one end of pressure adjusting spring 8 links to each other with lifting head 9, and the other end links to each other with regulator bolts 7.Lifting head 9 comprise the tapered sealed department that is resisted against damp channel 2 31 interconnecting part 31a 91 and be column and penetrate in the spring positioning part 92.
As Fig. 1, Fig. 2 and shown in Figure 3, when the safety valve used, connecting sleeve 1 was fixed on the valve body of multi-way valve, and simultaneously, corresponding oil duct is interconnected.The flow through damp channel 1 of plunger 6 of the exocoel 41 that hydraulic oil enters valve seat 1 enters the inner chamber 42 of valve seat 1, and the damp channel 2 31 of the valve seat 23 of flowing through again enters the pressure regulating cavity 22 that screws in cover 2.
When the pressure of hydraulic oil during less than the pre-compression force of pressure adjusting spring 8, sealed department 91 sealings of lifting head 9 are resisted against damp channel 2 31 outlet ports of valve seat 23 under the effect of pressure adjusting spring 8, promptly are in the state of blocking between damp channel 2 31 and the pressure regulating cavity 22.Under the effect of plunger 6 this moment hydraulic fluid pressure in Returnning spring 5 and inner chamber 42, press on the face that compresses 44 of valve seat 1, also be in the state of blocking between exocoel 41 and the pressure release passage 43, thus, P oil suction chamber and oil back chamber T are in the partition state.
When the pressure of hydraulic oil during greater than the pre-compression force of pressure adjusting spring 8, lifting head 9 overcomes pressure adjusting spring 8 and moves under the effect of hydraulic fluid pressure, be in connected state between damp channel 2 31 and the pressure regulating cavity 22, at this moment, flow through successively damp channel 2 31, pressure regulating cavity 22, communication passage 21, gap 1, gap 12 of a part of hydraulic oil in the inner chamber 42 enters oil back chamber T.Because the flowing of hydraulic oil caused in the inner chamber 42 hydraulic fluid pressures to reduce rapidly and was lower than hydraulic fluid pressures in the exocoel 41 this moment.And when the suffered pressure in plunger 6 outer ends greater than Returnning spring 5 and inner chamber 42 in hydraulic fluid pressures pressure and, plunger 6 axially moves and breaks away from the face of compressing 44 to the inner of valve seat 1, also be in connected state between exocoel 41 and the pressure release passage 43, thus, hydraulic oil in the oil suction chamber P directly enters oil back chamber T by exocoel 41, pressure release passage 43 successively, and then finishes the pressure off-load.When the pressure in the oil suction chamber P dropped to the pre-compression force that is lower than pressure adjusting spring 8, plunger 6 was resisted against on the abutment facing 44 of valve seat 1 again at the front outer of the elastic force effect lower plunger 6 of Returnning spring 5, and then finishes automatically and close.
In the multi-way valve working procedure, when causing the pressure of oil suction chamber P to be lower than the pressure of oil back chamber T when producing emptying phenomenon, because the effective active area of valve seat one 4 outer ends is greater than the effective active area of the inner, cause acting in the oil back chamber T power of valve seat one 4 outer ends greater than acting on inner power, thereby can make valve seat 1 move axially the disengaging valve body along valve seat 23, make the fluid in the oil back chamber T add in the P oil suction chamber, realize the function of unidirectional repairing by the valve port between valve seat 1 and valve body.When the pressure in the oil suction chamber P gos up near oil back chamber T internal pressure the time gradually, valve seat 1 is resisted against on the valve body of multi-way valve again at the front end conical surface of the elastic force effect lower valve base 1 of Returnning spring 5, and then finishes automatically and close.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper has used connecting sleeve 1 morely; Screw in cover 2; Communication passage 21; Pressure regulating cavity 22; Valve seat 23; Damp channel 2 31; Interconnecting part 31a; The 31b of damping hole portion; Valve seat 1; Exocoel 41; Inner chamber 42; Pressure release passage 43; Compress face 44; Returnning spring 5; Plunger 6; Damp channel 1; Interconnecting part 61a; The 61b of damping hole portion; Annular balancing slit 62; Regulator bolts 7; Pressure adjusting spring 8; Lifting head 9; Sealed department 91; Positioning part 92; O RunddichtringO 10; Gap 1; Gap 2 12 terms such as grade, but do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present utility model more easily; They are construed to any additional restriction all is contrary with the utility model spirit.

Claims (7)

1. multi-way valve safety valve, comprise connecting sleeve (1), have the valve seat one (4) of cavity and be connected valve seat two (3) on valve seat one (4) cavity the inner, in valve seat one (4), be provided with and slide and cavity is divided into the plunger (6) of inner chamber (42) and exocoel (41) along the cavity inwall; Have the pressure release passage (43) that communicates with exocoel (41) on the valve seat one (4); Be provided with Returnning spring (5) between described plunger (6) and the valve seat two (3), be fixed with the have pressure regulating cavity screw-in cover (2) of (22) on the described connecting sleeve (1), above-mentioned valve seat two (3) is connected in and screws on the cover (2), it is characterized in that, have the damp channel one (61) that connects above-mentioned inner chamber (42) and exocoel (41) on the described plunger (6); Have the damp channel two (31) that connects above-mentioned inner chamber (42) and pressure regulating cavity (22) on the described valve seat two (3); Establish in the described screw-in cover (2) can shutoff damp channel two (31) pressure-regulating device.
2. multi-way valve safety valve according to claim 1, it is characterized in that described damp channel one (61) and damp channel two (31) include damping hole portion (31b, 61b) and be positioned at the interconnecting part (31a, 61a) at damping hole portion (31b, 61b) two ends.
3. multi-way valve safety valve according to claim 2 is characterized in that, the diameter of described damping hole portion (31b, 61b) is 0.6~1mm.
4. according to claim 1 or 2 or 3 described multi-way valve safety valves, it is characterized in that, have some the axial also annular balancing slits (62) of column distribution on described plunger (6) outer side wall.
5. multi-way valve safety valve according to claim 4 is characterized in that, the quantity of described annular balancing slit (62) is 2~5.
6. according to claim 1 or 2 or 3 described multi-way valve safety valves, it is characterized in that, described pressure-regulating device comprises lifting head (9) that can shutoff damp channel two (31) and is threaded in the regulator bolts (7) that screws on the cover (2), be provided with pressure adjusting spring (8) between lifting head (9) and the regulator bolts (7), one end of pressure adjusting spring (8) links to each other with lifting head (9), and the other end links to each other with regulator bolts (7).
7. multi-way valve safety valve according to claim 6 is characterized in that, described lifting head (9) comprise tapered be resisted against the sealed department (91) on the damp channel two (31) and be column and penetrate in the spring positioning part (92).
CN2010202629015U 2010-07-19 2010-07-19 Safety valve for multi-way valve Expired - Lifetime CN201753790U (en)

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Application Number Priority Date Filing Date Title
CN2010202629015U CN201753790U (en) 2010-07-19 2010-07-19 Safety valve for multi-way valve

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Application Number Priority Date Filing Date Title
CN2010202629015U CN201753790U (en) 2010-07-19 2010-07-19 Safety valve for multi-way valve

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104019258A (en) * 2014-06-26 2014-09-03 华中科技大学无锡研究院 Double-damping direct-acting type hydraulic pressure overflowing valve
CN104358902A (en) * 2014-10-15 2015-02-18 浙江华益机械有限公司 Pressure safety valve
CN104747537A (en) * 2014-07-22 2015-07-01 施周平 Safety valve for multi-way valve
CN105134681A (en) * 2015-10-08 2015-12-09 杭州力龙液压有限公司 One-way cushion overflow valve and closed-type hydraulic pump
CN108167256A (en) * 2017-12-28 2018-06-15 邵立坤 A kind of plug-in trimmer valve
CN108180177A (en) * 2017-12-26 2018-06-19 邵立坤 It is a kind of for the hydraulic valve of differential circuit and hydraulic differential circuit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104019258A (en) * 2014-06-26 2014-09-03 华中科技大学无锡研究院 Double-damping direct-acting type hydraulic pressure overflowing valve
CN104019258B (en) * 2014-06-26 2016-08-17 华中科技大学无锡研究院 A kind of double damping One-stage Water Hydraulic Relief Valve
CN104747537A (en) * 2014-07-22 2015-07-01 施周平 Safety valve for multi-way valve
CN104358902A (en) * 2014-10-15 2015-02-18 浙江华益机械有限公司 Pressure safety valve
CN105134681A (en) * 2015-10-08 2015-12-09 杭州力龙液压有限公司 One-way cushion overflow valve and closed-type hydraulic pump
CN105134681B (en) * 2015-10-08 2017-06-06 杭州力龙液压有限公司 A kind of one-way buffer overflow valve and closed type hydraulic pump
CN108180177A (en) * 2017-12-26 2018-06-19 邵立坤 It is a kind of for the hydraulic valve of differential circuit and hydraulic differential circuit
CN108167256A (en) * 2017-12-28 2018-06-15 邵立坤 A kind of plug-in trimmer valve

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Address after: 317604 Zhejiang Taizhou Yuhuan County barley island Street iron faucet

Patentee after: Zhejiang Stronger Hydraulic Co., Ltd.

Address before: Taizhou City, Zhejiang province 317604 Yuhuan County Chen Yutie leading

Patentee before: Zhejiang Stronger Hydraulic Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20110302

CX01 Expiry of patent term