CN105782525A - Pressure relief valve for platform car - Google Patents

Pressure relief valve for platform car Download PDF

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Publication number
CN105782525A
CN105782525A CN201610312730.4A CN201610312730A CN105782525A CN 105782525 A CN105782525 A CN 105782525A CN 201610312730 A CN201610312730 A CN 201610312730A CN 105782525 A CN105782525 A CN 105782525A
Authority
CN
China
Prior art keywords
valve body
wall
pressure relief
spool
platform truck
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610312730.4A
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Chinese (zh)
Inventor
何立新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Jialite Machinery Co Ltd
Original Assignee
Ningbo Jialite Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Jialite Machinery Co Ltd filed Critical Ningbo Jialite Machinery Co Ltd
Priority to CN201610312730.4A priority Critical patent/CN105782525A/en
Publication of CN105782525A publication Critical patent/CN105782525A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded

Abstract

A pressure relief valve for a platform car comprises a valve body, a valve bush arranged in the valve body, a valve element arranged in the valve bush and matched with the valve bush and an elastic component acting on the top of the valve element, wherein an upper cavity and a lower oil outlet, communicating with each other, are arranged on the valve body; an upper oil inlet communicating with the upper cavity is formed in the side wall of the upper end of the upper cavity; the valve bush is positioned in the upper cavity; an outer circulating channel communicating with the upper oil inlet is arranged between the valve bush and the valve body; an inner circulating channel communicating with the upper oil inlet is arranged between the valve element and the valve bush; an outer circulating or blocking structure used for controlling the circulation or blockage of the outer circulating channel and the lower oil outlet is arranged between the valve bush and the valve body; and an inner circulating or blocking structure used for controlling the circulation or blockage of the inner circulating channel and the lower oil outlet is arranged between the valve element and the valve bush. Particularly, when the platform car adopting the pressure relief valve for the platform car is in a heavy load state, the platform car descends at an even speed instead of having a sharp drop phenomenon, the parts of the platform car are effectively protected, and safety hazards are prevented from occurring.

Description

Platform truck pressure relief valve body
Technical field
The present invention relates to platform truck pressure release technical field, specifically refer to a kind of pressure relief valve body for platform truck.
Background technology
Currently for common platform truck relief valve, because adopting spherical valve core to control circulation or the cut-off of wall scroll drain path, cause pressure release oil flow wayward and change sharply, it is impossible to realizing slow pressure release.Particularly when platform truck heavy load descending, because of the sharply change of pressure release flow, platform truck is caused sharply to decline, not only very easily damage platform truck self parts, and the great efforts that rebound in the process that platform truck sharply declines, make the goods of loading very easily drop, there is bigger potential safety hazard.
Summary of the invention
The technical problem to be solved in the present invention is; a kind of platform truck pressure relief valve body is provided; this platform truck relief valve physical ability realizes slow pressure release; particularly when platform truck is in heavy condition; platform truck declines more at the uniform velocity on the contrary; do not have the phenomenon sharply declined, effectively protect platform truck self parts, and avoid the generation of potential safety hazard.
The technical solution of the present invention is, a kind of platform truck pressure relief valve body is provided, including valve body, it is located at the valve pocket in valve body, the spool being located in valve pocket and be equipped with mutually with valve pocket, act on the elastomeric element at spool top, described valve body is provided with the epicoele being interconnected and lower oil-out, the upper end sidewall of described epicoele is provided with the upper oil-in being connected with epicoele, described valve pocket is positioned at intracavity, the outer circulation passage connected with upper oil-in it is provided with between described valve pocket and valve body, the interior circulation passage connected with upper oil-in it is provided with between described spool and valve pocket, it is provided with the outer circulation for controlling outer circulation passage and the circulation of lower oil-out or cut-off between described valve pocket and valve body or ends structure, it is provided with the interior circulation for controlling interior circulation passage and the circulation of lower oil-out or cut-off between described spool and valve pocket or ends structure.
The lateral wall of the equipped section that described spool and valve pocket are equipped mutually is provided with circulation groove, described interior circulation passage is formed between described circulation groove inwall corresponding with on valve pocket, the pressure release oil mass that the unit are that is effectively reduced the interior circulation passage formed by circulation groove is flow through, it is more conducive to the pressure release oil mass that balance is total, thus being more conducive to slow pressure release.
The cell body of described circulation groove downwardly extends in the shape of a spiral continuously around the lateral wall of the equipped section of spool, the upper surface of equipped section is run through on the top of the cell body of described circulation groove, the lower surface of equipped section is run through in the bottom of the cell body of described circulation groove, such circulation groove makes interior circulation passage form helical duct, and helical duct stroke is long, can at utmost reduce flow velocity, further realize slow pressure release.
The rectangular in cross-section of the cell body of described circulation groove, the cell wall of the cell body of rectangular in cross-section is perpendicular with bottom land, is more conducive to oil and collides with cell wall and reduce flow velocity further.
The ring-shaped area formed between internal chamber wall and the lateral wall of valve pocket of the epicoele of described valve body becomes described outer circulation passage, and outer circulation passage is formed by ring-like spacer district, is effectively increased oil actual internal area, is beneficial to and keeps stablizing of flow.
The bottom of described valve pocket is provided with the first conical outer wall, valve interior wall between epicoele with lower oil-out is provided with first conical inboard wall equipped mutually with the first conical outer wall, the first described conical outer wall and the first conical inboard wall form described outer circulation or cut-off structure, good sealing effect when conical outer wall and conical inboard wall are equipped, cut-off or circulation are reliable.
The bottom of described spool is provided with the second conical outer wall, the bottom of the inner chamber of described valve pocket is provided with second conical inboard wall equipped mutually with the second conical outer wall, the second described conical outer wall and the second conical inboard wall form described interior circulation or cut-off structure, good sealing effect when same conical outer wall and conical inboard wall are equipped, cut-off or circulation are reliable.
The top of described valve body is arranged to the capping being equipped with mutually with valve body, it is simple to the machine-shaping of valve body and assembling.
Described elastomeric element is trochoid spiral compression spring, the bigger diameter end of described trochoid spiral compression spring is linked on the suit post being located on capping inwall, the miner diameter end of described trochoid spiral compression spring is linked on the sleeve column at spool top and is pressed against on the roof of the equipped section of spool, trochoid spiral compression spring is utilized to have the characteristic of big miner diameter end, so that trochoid spiral compression spring can meet the equipped section roof of spool and compress the equipped space of the little compact of area.
The bottom of the lower oil-out of described valve body is provided with female thread, by the setting of female thread, it is simple to the platform truck pressure relief valve body integral installation of the present invention, in the parts of required installation, also allows for the dismounting of platform truck pressure relief valve body of the present invention simultaneously.
The invention have the advantages that the platform truck pressure relief valve body of the present invention; setting by spool, valve pocket and valve body; comprehensive setting plus each passage; no matter effective guarantee platform truck is the decline that can realize uniform speed slow under heavy duty, unloaded or light condition; avoid dropping of goods; effectively eliminate potential safety hazard, and simultaneously can also protecting platform car inner components, extend the service life of platform truck.
Accompanying drawing explanation
Fig. 1 is the structural representation of platform truck pressure relief valve body of the present invention.
Fig. 2 is the sectional structure schematic diagram of platform truck pressure relief valve body of the present invention.
As shown in the figure: 1 valve body, 1.1 epicoeles, 1.2 times oil-outs, 1.21 female threads, oil-in on 1.3,1.4 first conical inboard walls, 2 valve pockets, 2.1 first conical outer walls, 2.2 second conical inboard walls, 3 spools, 3.1 equipped sections, 3.2 second conical outer walls, 4 elastomeric elements, 5 outer circulation passages, circulation passage in 6,7 circulation grooves, 8 cappings.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
As it can be seen, the platform truck pressure relief valve body of the present invention, including including valve body 1, the valve pocket 2 be located in valve body 1, it is located in valve pocket 2 and the spool 3 equipped with valve pocket 2 phase, acts on the elastomeric element 4 at spool 3 top.
Described valve body 1 generally top seal and the column structure of bottom end opening, valve body 1 is provided with the epicoele 1.1 being interconnected and lower oil-out 1.2, the upper end sidewall of described epicoele 1.1 is provided with the upper oil-in 1.3 being connected with epicoele 1.1, and described valve pocket 2 is positioned at epicoele 1.1.Epicoele on valve body, lower oil-out, upper oil-in are arranged in order, make valve body overall structure very succinct, compact.
It is provided with the outer circulation passage 5 connected with upper oil-in 1.3 between described valve pocket 2 and valve body 1, between described spool 3 and valve pocket 2, is provided with the interior circulation passage 6 connected with upper oil-in 1.3.It is provided with between described valve pocket 2 and valve body 1 and circulates or the outer circulation that ends or cut-off structure for controlling outer circulation passage 5 and lower oil-out 1.2.It is provided with between described spool 3 and valve pocket 2 and circulates or the interior circulation that ends or cut-off structure for controlling interior circulation passage 6 and lower oil-out 1.2.
The lateral wall of the equipped section 3.1 that described spool 3 is equipped with valve pocket 2 phase is provided with circulation groove 7, forms described interior circulation passage 6 between described circulation groove 7 with corresponding inwall on valve pocket 2.The cell body of described circulation groove 7 downwardly extends in the shape of a spiral continuously around the lateral wall of the equipped section 3.1 of spool 3, the upper surface of equipped section 3.1 is run through on the top of the cell body of described circulation groove 7, equipped section 3.1 lower surface is run through in the bottom of the cell body of described circulation groove 7, and the rectangular in cross-section of the cell body of described circulation groove 7, in the present embodiment, cell body is one, can at utmost reduce the pressure release oil mass flow through in unit are.The bottom of described spool 3 is provided with the second conical outer wall 3.2, the bottom of the inner chamber of described valve pocket 2 is provided with second conical inboard wall 2.2 equipped with the second conical outer wall 3.2 phase, and the second described conical outer wall 3.2 and the second conical inboard wall 2.2 form described interior circulation or cut-off structure.
The ring-shaped area formed between internal chamber wall and the lateral wall of valve pocket 2 of the epicoele 1.1 of described valve body 1 becomes described outer circulation passage 5.The bottom of described valve pocket 2 is provided with the first conical outer wall 2.1, valve body 1 inwall between epicoele 1.1 with lower oil-out 1.2 is provided with first conical inboard wall 1.4 equipped with the first conical outer wall 2.1 phase, and the first described conical outer wall 2.1 and the first conical inboard wall 1.4 form described outer circulation or cut-off structure.
In the present embodiment, first conical inboard wall 1.4 is the bevelling of the right angle joint being arranged between epicoele 1.1 and lower oil-out 1.2, the bigger diameter end of this bevelling upper and miner diameter end under, the structure adopting bevelling forms the first described conical inboard wall and is effectively reduced the working (finishing) area of tapered wall, being located in valve body difficulty plus the first conical inboard wall 1.4 relatively larger, the bevelling of so little area then can reduce difficulty of processing.Same second conical inboard wall 2.2 is also adopted by bevelling and arranges, it is possible to reduce working (finishing) area and difficulty of processing.
The top of described valve body 1 is arranged to the capping 8 equipped with valve body 1 phase.Described elastomeric element 4 compresses spring for trochoid spiral, the bigger diameter end of described trochoid spiral compression spring is linked on the suit post being located on capping 8 inwalls, and the miner diameter end of described trochoid spiral compression spring is linked on the sleeve column at spool 3 top and is pressed against on the roof of spool 3 section of being equipped with 3.1.Certainly, it is that the structure with valve body molding is arranged that valve body may be used without top, and the nested form that trochoid spiral compression spring may be used without other is installed.Adopted trochoid spiral compression spring effect in the present embodiment and spool, because spool offers spiral helicine circulation groove, the size of the top end face of the equipped section of such spool is just smaller, and relatively conventional helical spring, because upper and lower side internal diameter is equally big, it is not suitable in this utility model, and the miner diameter end size of trochoid spiral compression spring to be far smaller than the size of bigger diameter end, miner diameter end is pressed on spool equipped section top end face on after, contact area between the top end face of the equipped section of miner diameter end and spool is enough, trochoid spiral compression spring can be made reliably to act on spool, ensure the normal operation of whole platform truck pressure relief valve body, also platform truck relief valve physical ability of the present utility model is made to be made very small and exquisite, structure is closely.
The bottom of the lower oil-out 1.2 of described valve body 1 is provided with female thread 1.21, the setting of female thread 1.21, and whole platform truck pressure relief valve body can be made to be unloaded easily on the miscellaneous part being contained in platform truck by instrument.
nullZero load or underloading work process: when platform truck needs to decline under zero load or light condition,Start the interior post rod parts of platform truck,Push rod stretches into and by spool 3 up jack-up from the lower oil-out 1.2 of valve body 1 lower end,Now the second conical outer wall 3.2 of spool 3 departs from the second conical inboard wall 2.2 of valve pocket 2,Interior circulation passage 6 connects with lower oil-out 1.2,The upper oil-in 1.1 being so interconnected、The fuel-displaced oil circuit of Article 1 is formed between interior circulation passage 6 and lower oil-out 1.2,And meanwhile,Because platform truck is in zero load or light condition,The pressure acted on valve pocket 2 from the pressure release oil in upper oil-in 1.1 inflow valve body 1 puts on the power on valve pocket 2 less than push rod indirectly by spool 3,Now valve pocket 2 can under the drive of spool 3 up jack-up,So that the first conical outer wall 2.1 of valve pocket 2 departs from the first conical inboard wall 1.3 of valve body 1,Now outer circulation passage 5 connects with lower oil-out 1.2,The upper oil-in 1.1 being so interconnected、The fuel-displaced oil circuit of Article 2 is formed between outer circulation passage 5 and lower oil-out 1.2,So when zero load or underloading,Just there are two fuel-displaced oil circuits,It is not enough slowly that such two fuel-displaced oil circuits just can make up draining flow velocity during because of unloaded or underloading,Thus ensureing that there is constant total draining flow,So that platform truck can realize slow decline at the uniform velocity.
nullHeavy duty work process: when platform truck needs to decline under heavy condition,Start the interior post rod parts of platform truck,Push rod stretches into and by spool 3 up jack-up from the lower oil-out 1.2 of valve body 1 lower end,Now the second conical outer wall 3.2 of spool 3 departs from the second conical inboard wall 2.2 of valve pocket 2,Interior circulation passage 6 connects with lower oil-out 1.2,The upper oil-in 1.1 being so interconnected、The fuel-displaced oil circuit of Article 1 is formed between interior circulation passage 6 and lower oil-out 1.2,And meanwhile,Because platform truck is in heavy condition,The pressure acted on valve pocket 2 from the pressure release oil in upper oil-in 1.1 inflow valve body 1 puts on the power on valve pocket 2 more than push rod indirectly by spool 3,Now valve pocket 2 can make its first conical outer wall 2.1 be pressed on the first conical inboard wall 1.3 of valve body 1 under the effect of pressure release oil oil pressure,Now outer circulation passage 5 ends with lower oil-out 1.2,Under heavy condition, so just only has the fuel-displaced oil circuit of above-mentioned Article 1,So fuel-displaced oil circuit just can make up the deficiency that during because of heavy duty, pressure release oil flow velocity is too fast,Thus ensureing that there is constant total draining flow,So that platform truck can realize slow decline at the uniform velocity.And along with the increase of contained goods weight, the pressure release oil pressure put on valve pocket 2 also increases as, the first conical outer wall 2.1 on such valve pocket 2 will be tightly pressed against on the first conical inboard wall 1.3 of valve body 1 always, so that outer circulation passage 5 remains cut-off state with lower oil-out 1.2, so just only have the fuel-displaced oil circuit of above-mentioned Article 1 always, make platform truck more can ensure that uniform speed slow declines all the time along with the increase of goods weight on the contrary under heavy condition.Additionally because the equipped section of spool 3 is provided with helicla flute, spiral helicine interior circulation passage 6 is defined between this helicla flute with corresponding inwall on valve pocket 2, effectively extend pressure release oil stroke, constantly collide with cell wall during circulation in spiral helicine interior circulation passage plus pressure release oil, pressure release oil flow velocity is made effectively to be reduced, thus further providing guarantee for exporting constant pressure release oil flow.
Generally speaking, the platform truck pressure relief valve body of the present invention, under zero load or light condition, the pressure release oil mass that output is constant can be ensured by two pressure release oil circuits, then can ensure, by a pressure release oil circuit, the pressure release oil mass that output is constant under heavy condition, no matter such platform truck is in heavy duty, decline under underloading or Light Condition, slow uniform descent can be realized, and along with the increase of contained goods weight, more can realize uniform speed slow on the contrary to decline, effectively protect platform truck inner body, extend the service life of platform truck, it also avoid dropping of goods simultaneously, eliminate potential safety hazard.

Claims (10)

  1. null1. a platform truck pressure relief valve body,It is characterized in that: include valve body (1)、It is located at the valve pocket (2) in valve body (1)、It is located in valve pocket (2) and the spool (3) equipped mutually with valve pocket (2)、Act on the elastomeric element (4) at spool (3) top,Described valve body (1) is provided with the epicoele (1.1) and lower oil-out (1.2) that are interconnected,The upper end sidewall of described epicoele (1.1) is provided with the upper oil-in (1.3) being connected with epicoele (1.1),Described valve pocket (2) is positioned at epicoele (1.1),The outer circulation passage (5) connected with upper oil-in (1.3) it is provided with between described valve pocket (2) and valve body (1),The interior circulation passage (6) connected with upper oil-in (1.3) it is provided with between described spool (3) and valve pocket (2),It is provided with the outer circulation for controlling outer circulation passage (5) and the circulation of lower oil-out (1.2) or cut-off between described valve pocket (2) and valve body (1) or ends structure,It is provided with the interior circulation for controlling interior circulation passage (6) and the circulation of lower oil-out (1.2) or cut-off between described spool (3) and valve pocket (2) or ends structure.
  2. 2. platform truck pressure relief valve body according to claim 1, it is characterized in that: the lateral wall of the equipped section (3.1) that described spool (3) and valve pocket (2) are equipped mutually is provided with circulation groove (7), forms described interior circulation passage (6) between described circulation groove (7) with the upper corresponding inwall of valve pocket (2).
  3. 3. platform truck pressure relief valve body according to claim 2, it is characterized in that: the cell body of described circulation groove (7) downwardly extends in the shape of a spiral continuously around the lateral wall of the equipped section (3.1) of spool (3), the upper surface of equipped section (3.1) is run through on the top of the cell body of described circulation groove (7), and the lower surface of equipped section (3.1) is run through in the bottom of the cell body of described circulation groove (7).
  4. 4. platform truck pressure relief valve body according to claim 3, it is characterised in that: the rectangular in cross-section of the cell body of described circulation groove (7).
  5. 5. platform truck pressure relief valve body according to claim 1, it is characterised in that: the ring-shaped area formed between internal chamber wall and the lateral wall of valve pocket (2) of the epicoele (1.1) of described valve body (1) becomes described outer circulation passage (5).
  6. 6. platform truck pressure relief valve body according to claim 1, it is characterized in that: the bottom of described valve pocket (2) is provided with the first conical outer wall (2.1), valve body (1) inwall between epicoele (1.1) with lower oil-out (1.2) is provided with first conical inboard wall (1.4) equipped mutually with the first conical outer wall (2.1), described the first conical outer wall (2.1) and the first conical inboard wall (1.4) and forms described outer circulation or cut-off structure.
  7. 7. platform truck pressure relief valve body according to claim 1, it is characterized in that: the bottom of described spool (3) is provided with the second conical outer wall (3.2), the bottom of the inner chamber of described valve pocket (2) is provided with second conical inboard wall (2.2) equipped mutually with the second conical outer wall (3.2), described the second conical outer wall (3.2) and the second conical inboard wall (2.2) and forms described interior circulation or cut-off structure.
  8. 8. platform truck pressure relief valve body according to claim 1, it is characterised in that: the top of described valve body (1) is arranged to the capping (8) equipped mutually with valve body (1).
  9. 9. platform truck pressure relief valve body according to claim 8, it is characterized in that: described elastomeric element (4) compresses spring for trochoid spiral, the bigger diameter end of described trochoid spiral compression spring is linked on the suit post being located on capping (8) inwall, and the miner diameter end of described trochoid spiral compression spring is linked on the sleeve column at spool (3) top and is pressed against on the roof of the equipped section (3.1) of spool (3).
  10. 10. platform truck pressure relief valve body according to claim 1, it is characterised in that: the bottom of the lower oil-out (1.2) of described valve body (1) is provided with female thread (1.21).
CN201610312730.4A 2016-05-12 2016-05-12 Pressure relief valve for platform car Pending CN105782525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610312730.4A CN105782525A (en) 2016-05-12 2016-05-12 Pressure relief valve for platform car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610312730.4A CN105782525A (en) 2016-05-12 2016-05-12 Pressure relief valve for platform car

Publications (1)

Publication Number Publication Date
CN105782525A true CN105782525A (en) 2016-07-20

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Application Number Title Priority Date Filing Date
CN201610312730.4A Pending CN105782525A (en) 2016-05-12 2016-05-12 Pressure relief valve for platform car

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109642683A (en) * 2016-08-03 2019-04-16 株式会社三国 Safety valve

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3314837A1 (en) * 1982-06-03 1983-12-08 Jörn 4320 Hattingen Dams PRESSURE LIMIT VALVE
US5501242A (en) * 1992-06-24 1996-03-26 Expro North Sea Limited Pressure relief valve
CN2499652Y (en) * 2001-08-29 2002-07-10 黄钊仁 Oil overflow cut-off valve with safety pressure discharge device
CN201547360U (en) * 2009-12-10 2010-08-11 青岛力克川液压机械有限公司 Overflow valve
CN202203467U (en) * 2011-08-11 2012-04-25 富阳通力机械制造有限公司 Long floor jack throttle valve capable of controlling lowering speed
CN202832578U (en) * 2012-09-13 2013-03-27 巨隆集团芜湖兴隆液压有限公司 Large-flow hydraulic control one-way valve
CN202914270U (en) * 2012-09-19 2013-05-01 翁祯源 Improved structure of decompression valve
CN104196793A (en) * 2014-07-31 2014-12-10 红安安达新材料有限责任公司 Overflow valve
CN205578808U (en) * 2016-05-12 2016-09-14 宁波市加力特机械有限公司 Platform truck pressure relief valve body

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3314837A1 (en) * 1982-06-03 1983-12-08 Jörn 4320 Hattingen Dams PRESSURE LIMIT VALVE
US5501242A (en) * 1992-06-24 1996-03-26 Expro North Sea Limited Pressure relief valve
CN2499652Y (en) * 2001-08-29 2002-07-10 黄钊仁 Oil overflow cut-off valve with safety pressure discharge device
CN201547360U (en) * 2009-12-10 2010-08-11 青岛力克川液压机械有限公司 Overflow valve
CN202203467U (en) * 2011-08-11 2012-04-25 富阳通力机械制造有限公司 Long floor jack throttle valve capable of controlling lowering speed
CN202832578U (en) * 2012-09-13 2013-03-27 巨隆集团芜湖兴隆液压有限公司 Large-flow hydraulic control one-way valve
CN202914270U (en) * 2012-09-19 2013-05-01 翁祯源 Improved structure of decompression valve
CN104196793A (en) * 2014-07-31 2014-12-10 红安安达新材料有限责任公司 Overflow valve
CN205578808U (en) * 2016-05-12 2016-09-14 宁波市加力特机械有限公司 Platform truck pressure relief valve body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109642683A (en) * 2016-08-03 2019-04-16 株式会社三国 Safety valve

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Application publication date: 20160720