CN1587720A - Leakless plane type pure water electrohydraulic change valve - Google Patents
Leakless plane type pure water electrohydraulic change valve Download PDFInfo
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- CN1587720A CN1587720A CN 200410053552 CN200410053552A CN1587720A CN 1587720 A CN1587720 A CN 1587720A CN 200410053552 CN200410053552 CN 200410053552 CN 200410053552 A CN200410053552 A CN 200410053552A CN 1587720 A CN1587720 A CN 1587720A
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Abstract
The invention discloses a kind of no leakage and pure water flat electro-hydraulic directional control valve. A king valve cover is in the heart of the king valve and flat king valve core compacted by a spring lies in the cavity of axial of the king valve body; on the upper of king valve body there is a water inlet and a water outlet connected by the king valve's channel; in the king valve there is a sensitive cavity connected with electromagnetic ball valve by tunnels; a valve port damper installed at the valve entrance of electromagnetic ball valve matches with the sensitive cavity of king valve in order to control the flow velocity of fluid and reduce directional strike at the same time diverting fast. The invention adopt flat king valve core set on the packing force of the king valve cover and increase dramatically valve covers, adopt direct seal to realize zero leakage; divert fast and steadily through matching the sensitive cavity of king valve with the damper at the entrance of the electromagnetic ball valve; not change the structure of the king valve and only change structural form of electromagnetic ball valve in order to have different functions and fit to work under conditions of middle and high pressure water medium.
Description
Technical field
The present invention relates to the hydraulic control technology is the hydraulic element of feature, relates in particular to a kind of no leakage and pure water flat electro-hydraulic reversing valve.
Background technique
" environment revolution " brought powerful " external pressure " for the development of hydraulic pressure technology, seeks the extensive attention that the Nonpoisonous, non-environmental-pollution green fluid compatible fully with environment just is being subjected to countries in the world hydraulic pressure circle.The pure water hydraulics technology is because of the unique advantage of its medium wide material sources, environmental friendliness, clean and safe and good flame resistance, and becomes a research focus in international fluid transmission and control field.The pure water selector valve is as one of the most key valve element of pure water hydraulics system, and its research also becomes to attach most importance to.
Traditional oil pressure selector valve mostly is slide valve type, rotary valve type or cone valve type.The suffered unbalanced force of slide valve type and rotary valve type change-over valve core is very little, and needed steering force is also less, but needs to guarantee the gap of relative movement between spool and valve opening, leaks often bigger.Especially for aqueous medium, the viscosity of water is low can to increase leakage loss, and when identical with pressure reduction, the leakage loss of the hydraulic pressure selector valve of same specification is tens of times of oil pressure selector valve in the gap.Thereby, for just reduce to leak must be gap design very little, this must bring very big difficulty to processing, very easily occurs stopping up during kinematic pair work simultaneously, stuck phenomenon.The leakage of cone valve type selector valve is very little, but the axial hydraulic force unbalance that spool is subjected to, required steering force is also bigger.In addition, because the compressibility of water is little, rigidity is big, the compression shock that is produced when the pure water selector valve switches suddenly is even more serious.
In addition, the pressure for vaporization height of water make water electrode easily vaporize and boiling, thereby under the same conditions, the cavitation erosion degree that the pure water selector valve suffers is than the strong hundreds of times of oil pressure selector valve; Compare with mineral oil, aqueous medium corrosivity is very strong, and the destruction of corrosive action makes prior oil pressure selector valve material all not be suitable for aqueous medium.
Therefore, how to prevent to leak, reduce reversing impact, reduce corrosion and effectively suppress cavitation erosion, improve quiet dynamic characteristic, become the key point of pure water selector valve research.The pure water selector valve of development mainly contains two kinds of forms in the world at present:
First kind is to adopt the cone valve type structure.As the pure water selector valve of Finland Danfoss company development etc.It is formed by being installed in two groups of main coning valves on the valve body, two pilot-actuated valves that are designed to the end cap flange and two unidirectional controlled cone valves symmetrically.Such valve conveyance capacity is strong, cavitation resistive property good.But it is subjected to the influence of machining accuracy, can't overcome very pressure of axial injustice fully, and needed steering force is also bigger.
Second kind is to adopt slide-valve structure.As the pure water selector valve of German hauhinco company development etc.Such valve leaks for reducing, very little the design of the matching gap between spool and the valve pocket, and so little gap has proposed very harsh requirement for the processing technology of valve, has improved difficulty of processing and processing cost greatly.In addition, so little gap is also easily by the impurity jam, so its application has been subjected to considerable restraint.
Summary of the invention
The object of the present invention is to provide a kind of no leakage and pure water flat electro-hydraulic reversing valve, be used to improve the quiet dynamic characteristic of valve, realize not having and leak, alleviate phenomenons such as cavitation erosion, impact and corrosion simultaneously, be applicable under the mesohigh aqueous medium environment.
The technical solution adopted for the present invention to solve the technical problems is to comprise:
1) the plane main valve plug is contained in left end cap, main valve body, in the right end cap, main valve housing is contained in the main valve body center, the spring that is contained in the main valve plug right-hand member hole is pressed against the outer shoulder face of main valve plug on the main valve housing end face, form the main valve sensitive cavity between main valve plug right side and right end cap hole, the main valve body upper end has water intake and working hole, both are interconnected by the main valve housing inner flow passage, water intake is board-like the connection with working hole, two ends, the main valve plug left and right sides add back-up ring with first U-shaped sealing skeleton respectively, two second U-shaped sealing skeletons add retaining ring sealing, one of them second U-shaped sealing skeleton adds retaining ring sealing and is contained in the support of right end cap hole, first U-shaped sealing skeleton is by in the support set and guide sleeve that are contained in the main valve body left end hole, O-ring seals that support set is outer and main valve body sealing, two second U-shaped sealing skeletons are supported by two guide sleeves;
Have an end in main valve body, right end cap upper end and be communicated with the runner that the water intake the other end is communicated with pure water Solenoid ball valve water intake, have an end in main valve body, right end cap lower end and be communicated with the runner that the pure water Solenoid ball valve backwater mouth the other end is communicated with the main valve body backwater mouth, the main valve sensitive cavity communicates with the working hole of pure water Solenoid ball valve by the center hole of right end cap;
2) the pure water Solenoid ball valve comprises:
The spring valve pocket that radially has two groups of holes from up to down is housed in valve body hole successively, radially have the octal valve pocket in two groups of holes, radially have the six ports valve covers in one group of hole, radially have the two ports valve covers in one group of hole, on the roundlet cylinder of spring valve set upper side the modulating valve upper shield is housed, the valve pocket lid is pressed in and stretches out on the outer spring valve pocket shoulder of valve body, the force amplificatory structure that the dry type DC electromagnet is housed is pressed in the lower end surface of push rod, the spring block upper end that is contained in the spring valve pocket withstands on the Returnning spring, the spring block lower end withstands on first ceramic ball that is contained in the spring valve pocket, the push rod upper end that is contained in the octal valve pocket withstands on first ceramic ball, the push rod lower end withstands on second ceramic ball that is contained in the six ports valves cover, the push rod upper end that is contained in six ports valves cover and the two ports valves cover withstands on second ceramic ball, be contained in U-shaped sealing skeleton is housed on the push rod lower end in the two ports valves cover, between U-shaped sealing skeleton and push rod shoulder face little spring is housed;
The valve body left side has water intake, working hole, the backwater mouth that damper is set respectively, and the valve body right side has and is communicated with the valve body runner at two ends up and down; When the dry type DC electromagnet gets when electric, force amplificatory structure promotes push rod and moves upward, and second ceramic ball and octal valve pocket hide, and first ceramic ball and octal valve pocket leave, one group of inclined hole that liquid stream puts by water intake, spring valve, one group of inclined hole of octal valve pocket top enter working hole; When dry type DC electromagnet dead electricity, Returnning spring promotes spring block and moves upward, and second ceramic ball and octal valve pocket leave, and first ceramic ball and octal valve pocket hide, liquid stream is by one group of inclined hole of working hole, octal valve pocket bottom, the inclined hole that six ports valves put, enters water outlet; In the valve working procedure, there is part liquid stream to enter the Returnning spring chamber through another group inclined hole that spring valve puts, part liquid stream enters little spring chamber, lower end through the radial direction through hole that valve flowing channel, two ports valves put, and makes the suffered fluid pressure balance of push rod and ceramic ball.
Pure water Solenoid ball valve water intake and working hole can exchange, and form P1-A1, the valve of P1-O function.
Seal with O-ring seals between the two ports valves cover of pure water Solenoid ball valve and the valve body, seal with O-ring seals between six ports valves cover and the valve body, seal with O-ring seals between octal valve pocket and the valve body, seal with O-ring seals between spring valve pocket and the valve body, seal reinforced seal with U-shaped between two ports valves cover and the push rod, seal with O-ring seals between six ports valves cover and the push rod.
The present invention compares with background technique, and the useful effect that has is:
1, adopt the plane main valve plug, this main valve plug and main valve housing seal by end face, and the appropriate design impacting force realizes zero leakage when can guarantee reliable the commutation, and simultaneously, required steering force was little when the spool of this structure was worked under condition of high voltage;
2, between main valve plug and main valve body, seal reinforced seal with the U type, and in main valve plug two ends increase valve pocket structure, adopt O-ring seals directly to seal between valve pocket and the valve body, efficiently solve the pure water selector valve and leak serious problem, simultaneously because the supporting effect of two ends valve pocket, hydraulic radial power has obtained balance, can guarantee that main valve plug can deflection, flexible movements are reliable, are applicable to the mesohigh operating conditions;
3, sensitive cavity is set on main valve body, pure water Solenoid ball valve valve port is provided with the valve port damper, and carries out matching Design, has guaranteed that valve is reducing reversing impact in the commutation fast;
4, this valve has adopted the control mode that internal control leaks, and its pure water Solenoid ball valve is the two-position three way electromagnetic ball valve, does not change the main valve structure, only change pure water Solenoid ball valve valve core structure, just can realize different functions, it is good therefore to have versatility, is easy to standardized characteristics;
5, the main valve inner flow passage of particular design and valve pocket structure, help alleviating the harm that cavitation erosion brings, for preventing cavitation erosion, utilize flow field simulation that the main valve inner flow passage has been carried out optimal design, can make current smooth more, alleviated cavitation erosion and flow noise, all elements of valve are equal to adopt anti-corrosion non-corrosive material, can guarantee that valve has the long life-span.
Description of drawings
Fig. 1 is a structural principle schematic representation of the present invention;
Fig. 2 is a pure water Solenoid ball valve structural principle enlarged diagram among Fig. 1.
Among the figure: the 1st, left end cap, the 2nd, main valve plug, the 3rd, guide sleeve, the 4th, back-up ring, the 5th, U-shaped sealing skeleton, the 6th, O-ring seals, the 7th, support set, the 8th, main valve body, the 9th, guide sleeve, the 10th, U-shaped sealing skeleton, the 11st, back-up ring, the 12nd, guide sleeve, the 13rd, O-ring seals, the 14th, spring, the 15th, right end cap, the 16th, screw plug, the 17th, O-ring seals, the 18th, main valve sensitive cavity, the 19th, pilot valve, the 20th, guide's spool, the 21st, pilot valve valve port damper, the 18th, main valve sensitive cavity, the 19th, main valve valve port lining, the 20th, main valve housing, the 21st, O-ring seals, the 22nd, valve port damper, the 23rd, screw, the 24th, force amplificatory structure, the 25th, dry type DC electromagnet, the 26th, push rod, the 27th, back-up ring, the 28th, U type sealing skeleton, the 29th, ball is stifled, the 30th, valve body, the 31st, little spring, 32 is two ports valve covers, the 33rd, O-ring seals, the 34th, back-up ring, the 35th, O-ring seals, the 36th, back-up ring, 37 is six ports valve covers, the 38th, the octal valve pocket, the 39th, push rod, the 40th, back-up ring, the 41st, ceramic ball, the 42nd, spring valve pocket, the 43rd, spring block, the 44th, valve pocket lid, the 45th, Returnning spring, the 46th, O-ring seals, the 47th, O-ring seals, the 48th, O-ring seals, the 49th, ceramic ball, the 50th, O-ring seals, the 51st, O-ring seals, the 52nd, O-ring seals, the P mouth is a water intake, the A mouth is a working hole, and P1 is a water intake, and A1 is a working hole, O is a backwater mouth, B is a runner, and C is a runner, and T is a backwater mouth.
Embodiment
As shown in Figure 1 and Figure 2, no leakage and pure water flat electro-hydraulic reversing valve comprises:
1) plane main valve plug 2 is contained in left end cap 1, main valve body 8, in the right end cap 15, main valve housing 20 is contained in main valve body 8 centers, the spring 14 that is contained in the main valve plug 2 right-hand member holes is pressed against main valve plug 2 outer shoulder faces on main valve housing 20 end faces, form main valve sensitive cavity 18 between main valve plug 2 right sides and right end cap 15 holes, main valve body 8 upper ends have water intake P and working hole A, both are interconnected by main valve housing 20 inner flow passages, water intake P is board-like the connection with working hole A, two ends, main valve plug 2 left and right sides add back-up ring 4 with first U-shaped sealing skeleton 5 respectively, two second U-shaped sealing skeletons 10 add back-up ring 11 sealings, one of them second U-shaped sealing skeleton 10 adds back-up ring 11 sealings and is contained in the support of right end cap 15 holes, first U-shaped sealing skeleton 5 is by in the support set 7 and guide sleeve 3 that are contained in the main valve body 8 left end holes, support set 7 outer O-ring seals 6 seal with main valve body 8, and two second U-shapeds sealing skeletons 10 are by two guide sleeves 9,12 support;
Have an end in main valve body 8, right end cap 15 upper ends and be communicated with the runner B that the water intake P the other end is communicated with pure water Solenoid ball valve water intake P1, have an end in main valve body 8, right end cap 15 lower ends and be communicated with the runner C that the pure water Solenoid ball valve backwater mouth O the other end is communicated with main valve body backwater mouth T, main valve sensitive cavity 18 communicates with the working hole A1 of pure water Solenoid ball valve by the center hole of right end cap 15;
2) the pure water Solenoid ball valve comprises:
The spring valve pocket 42 that radially has two groups of holes from up to down is housed in valve body 30 holes successively, radially have the octal valve pocket 48 in two groups of holes, radially have the six ports valves cover 47 in one group of hole, radially have the two ports valves cover 32 in one group of hole, on the spring valve pocket 42 upper end roundlet cylinders modulating valve upper shield 44 is housed, valve pocket lid 44 is pressed on spring valve pocket 42 shoulders that stretch out outside the valve body 30, the force amplificatory structure 24 that dry type DC electromagnet 25 is housed is pressed in the lower end surface of push rod 26, spring block 43 upper ends that are contained in the spring valve pocket 42 withstand on the Returnning spring 45, spring block 43 lower ends withstand on first ceramic ball 41 that is contained in the spring valve pocket 42, push rod 39 upper ends that are contained in the octal valve pocket 38 withstand on first ceramic ball 41, push rod 39 lower ends withstand on second ceramic ball 49 that is contained in the six ports valves cover 37, push rod 26 upper ends that are contained in six ports valves cover, the 37 and two ports valves cover 32 withstand on second ceramic ball 49, be contained in U-shaped sealing skeleton 28 is housed on push rod 26 lower ends in the two ports valves cover 32, between U-shaped sealing skeleton 28 and push rod 26 shoulder faces little spring 31 is housed;
Pure water Solenoid ball valve water intake P1 and working hole A1 can exchange, and form P1-A1, the valve of P1-O function.
Seal with O-ring seals 51 between the two ports valves cover 32 of pure water Solenoid ball valve and the valve body 30, seal with O-ring seals 50 between six ports valves cover 37 and the valve body 30, seal with O- ring seals 48,47 between octal valve pocket 38 and the valve body 30, seal with O-ring seals 46 between spring valve pocket 42 and the valve body 30, with 28 sealings of U-shaped sealing skeleton, use O-ring seals 35 sealings between six ports valves cover 37 and the push rod 26 between two ports valves cover 32 and the push rod 26.
The working pressure of this valve is 14MPa (maximum service pressure is 21MPa), and peak rate of flow is 150L/min,
Adopting the non-corrosive material combination of plane main valve plug structural type, main valve sensitive cavity and poppet port damper coupling, reliable seal form and special processing is the characteristics of this valve.This valve adopts socket head screw to connect main valve body 8 and left end cap 1 and right end cap 15, and main valve plug 2 is contained in main valve body 8, left end cap 1, the right end cap 15, and main valve housing 20 is contained in main valve body 8 centers, and spring 14 is pressed against main valve plug 2 on the main valve housing 20.Main valve body 8 upper ends have water intake P and working hole A, and both are interconnected by main valve housing 24 inner flow passages, and intake-outlet adopts board-like connection.O-ring seals 21 is sealed into water outlet when being used for board-like connection, and valve port lining 19 is used for fixing seal ring 21.Two ends, main valve plug 2 left and right sides add back-up ring 4,11 sealings of U-shaped sealing skeleton 10 encryption block circles by U-shaped sealing skeleton 5, and this fitted seal is good in high pressure water ambient condition lower seal performance.U-shaped sealing skeleton 5 is supported by support set 7 and guide sleeve 3, and support set 7 is directly sealed by O-ring seals 6 and main valve body 8, and U-shaped sealing skeleton 10 is supported by guide sleeve 9 and guide sleeve 12.
Have an end in main valve body 8, right end cap 15 upper ends and be communicated with the runner B that the water intake P the other end is communicated with pure water Solenoid ball valve water intake P1, the runner C. sensitive cavity 18 that has end connection pure water Solenoid ball valve backwater mouth O the other end connection main valve body backwater mouth T in main valve body 8, right end cap 15 lower ends has been carried out matching Design with pure water Solenoid ball valve valve port damper 22, effectively regulated the liquid flowing speed of turnover sensitive cavity, guaranteed that main valve has reduced reversing impact in the commutation fast.The pure water Solenoid ball valve is the two-position three way electromagnetic ball valve, it relies on the power on/off of dry type DC electromagnet 25, realize discharge opeing and feed liquor, thereby control main valve plug 2 opens or closes. pure water flat electro-hydraulic directional is the internal control formula that leaks, its water intake P communicates with pure water Solenoid ball valve water intake P1 by runner B, pure water Solenoid ball valve backwater mouth O communicates with main valve backwater mouth T by runner C, and main valve sensitive cavity 18 communicates with the working hole A1 of pure water Solenoid ball valve by the center hole of right end cap 15.
When the dry type DC electromagnet 25 of pure water Solenoid ball valve when electric, force amplificatory structure 24 promotes push rod 26 and moves upward, second ceramic ball 49 hides with octal valve pocket 38, first ceramic ball 41 is left with octal valve pocket 38, the liquid stream that is entered by main intake valve P enters the pure water Solenoid ball valve by runner B, and by water intake P1, one group of inclined hole on the spring valve pocket 42, one group of inclined hole of octal valve pocket 38 tops, enter working hole A1, and right end cap 15 center holes by being communicated with pure water Solenoid ball valve working hole A1, enter main valve sensitive cavity 18, thereby promote main valve plug 2 to left movement, and be pressed against on the end face of main valve housing 20, main valve is closed; When dry type DC electromagnet 25 dead electricity of pure water Solenoid ball valve, Returnning spring 45 promotes spring block 43 and moves upward, second ceramic ball 49 is left with octal valve pocket 38, first ceramic ball 41 hides with octal valve pocket 38, liquid stream in the main valve sensitive cavity 18 enters the working hole A1 of pure water Solenoid ball valve by the right end cap center hole, and one group of inclined hole by octal valve pocket 38 bottoms, inclined hole on the six ports valves cover 37, enter water outlet O, and enter main valve backwater mouth T by runner C, main valve plug 2 moves right under the liquid stream effect that is entered by water intake P, main valve plug 2 leaves with main valve housing 20, water intake P communicates with working hole A. do not change the main valve structure, only change the valve core structure form of pure water Solenoid ball valve, just can realize different selector valve functions.
Claims (3)
1. no leakage and pure water flat electro-hydraulic reversing valve is characterized in that comprising:
1) plane main valve plug (2) is contained in left end cap (1), main valve body (8), in the right end cap (15), main valve housing (20) is contained in main valve body (8) center, the spring (14) that is contained in main valve plug (2) the right-hand member hole is pressed against the outer shoulder face of main valve plug (2) on main valve housing (20) end face, form main valve sensitive cavity (18) between main valve plug (2) right side and right end cap (15) hole, main valve body (8) upper end has water intake (P) and working hole (A), both are interconnected by main valve housing (20) inner flow passage, water intake (P) is board-like the connection with working hole (A), main valve plug (2) two ends, the left and right sides add back-up ring (4) with first U-shaped sealing skeleton (5) respectively, two second U-shaped sealing skeletons (10) add back-up ring (11) sealing, one of them second U-shaped sealing skeleton (10) adds back-up ring (11) sealing and is contained in the support of right end cap (15) hole, first U-shaped sealing skeleton (5) is by in the support set (7) and guide sleeve (3) that are contained in main valve body (8) the left end hole, O-ring seals (6) and main valve body (8) sealing that support set (7) is outer, two second U-shaped sealing skeletons (10) are by two guide sleeves (9,12) support;
Have an end in main valve body (8), right end cap (15) upper end and be communicated with the runner (B) that water intake (P) the other end is communicated with pure water Solenoid ball valve water intake (P1), have an end in main valve body (8), right end cap (15) lower end and be communicated with the runner (C) that pure water Solenoid ball valve backwater mouth (O) the other end is communicated with main valve body backwater mouth (T), main valve sensitive cavity (18) communicates with the working hole (A1) of pure water Solenoid ball valve by the center hole of right end cap (15);
2) the pure water Solenoid ball valve comprises:
The spring valve pocket (42) that radially has two groups of holes from up to down is housed in valve body (30) hole successively, radially have the octal valve pocket (48) in two groups of holes, radially have the six ports valve covers (47) in one group of hole, radially have the two ports valve covers (32) in one group of hole, on the roundlet cylinder of spring valve pocket (42) upper end modulating valve upper shield (44) is housed, valve pocket lid (44) is pressed in and stretches out on outer spring valve pocket (42) shoulder of valve body (30), the force amplificatory structure (24) that dry type DC electromagnet (25) are housed is pressed in the lower end surface of push rod (26), spring block (43) upper end that is contained in the spring valve pocket (42) withstands on the Returnning spring (45), spring block (43) lower end withstands on first ceramic ball (41) that is contained in the spring valve pocket (42), push rod (39) upper end that is contained in the octal valve pocket (38) withstands on first ceramic ball (41), push rod (39) lower end withstands on second ceramic ball (49) that is contained in the six ports valve covers (37), push rod (26) upper end that is contained in six ports valve covers (37) and the two ports valve covers (32) withstands on second ceramic ball (49), be contained in U-shaped sealing skeleton (28) is housed on push rod (26) lower end in the two ports valve covers (32), between U-shaped sealing skeleton (28) and push rod (26) shoulder face little spring (31) is housed;
Valve body (30) left side has water intake (P1), working hole (A1), the backwater mouth (O) that damper (22) are set respectively, and the valve body right side has and is communicated with valve body (10) runner at two ends (D) up and down; When dry type DC electromagnet (25) when electric, force amplificatory structure (24) promotes push rod (26) and moves upward, second ceramic ball (49) hides with octal valve pocket (38), first ceramic ball (41) is left with octal valve pocket (38), liquid stream enters working hole (A1) by one group of inclined hole on water intake (P1), the spring valve pocket (42), one group of inclined hole of octal valve pocket (38) top; When dry type DC electromagnet (25) dead electricity, Returnning spring (45) promotes spring block (43) and moves upward, second ceramic ball (49) is left with octal valve pocket (38), first ceramic ball (41) hides with octal valve pocket (38), liquid stream is by working hole (A1), one group of following inclined hole of octal valve pocket (38), the inclined hole on the six ports valve covers (37), enters water outlet (O); In the valve working procedure, there is part liquid stream to enter the Returnning spring chamber through another group inclined hole on the spring valve pocket (42), part liquid stream enters little spring chamber, lower end through the radial direction through hole on valve flowing channel (D), the two ports valve covers (32), makes the suffered fluid pressure balance of push rod and ceramic ball.
2, a kind of no leakage and pure water flat electro-hydraulic reversing valve according to claim 1, it is characterized in that: pure water Solenoid ball valve water intake (P1) and working hole (A1) can exchange, and form P1-A1, the valve of P1-O function.
3, a kind of no leakage and pure water flat electro-hydraulic reversing valve according to claim 1, it is characterized in that: seal with O-ring seals (51) between two ports valve covers (32) of pure water Solenoid ball valve and the valve body (30), seal with O-ring seals (50) between six ports valve covers (37) and the valve body (30), use O-ring seals (48) between octal valve pocket (38) and the valve body (30), (47) sealing, seal with O-ring seals (46) between spring valve pocket (42) and the valve body (30), seal skeleton (28) sealing with U-shaped between two ports valve covers (32) and the push rod (26), seal with O-ring seals (35) between six ports valve covers (37) and the push rod (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053552 CN1271339C (en) | 2004-08-04 | 2004-08-04 | Leakless plane type pure water electrohydraulic change valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410053552 CN1271339C (en) | 2004-08-04 | 2004-08-04 | Leakless plane type pure water electrohydraulic change valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1587720A true CN1587720A (en) | 2005-03-02 |
| CN1271339C CN1271339C (en) | 2006-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410053552 Expired - Fee Related CN1271339C (en) | 2004-08-04 | 2004-08-04 | Leakless plane type pure water electrohydraulic change valve |
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| Country | Link |
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| CN (1) | CN1271339C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871537A (en) * | 2010-06-21 | 2010-10-27 | 山西平阳广日机电有限公司 | Mining intrinsic safety electro-hydraulic control reversing valve core component |
| CN103573735A (en) * | 2013-11-14 | 2014-02-12 | 浙江大学 | Pilot large-flow load control valve using displacement and force feedback principle |
| CN109442061A (en) * | 2018-12-27 | 2019-03-08 | 山西双环重工集团有限公司 | Three seven port valves and stamping equipment |
-
2004
- 2004-08-04 CN CN 200410053552 patent/CN1271339C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871537A (en) * | 2010-06-21 | 2010-10-27 | 山西平阳广日机电有限公司 | Mining intrinsic safety electro-hydraulic control reversing valve core component |
| CN103573735A (en) * | 2013-11-14 | 2014-02-12 | 浙江大学 | Pilot large-flow load control valve using displacement and force feedback principle |
| CN109442061A (en) * | 2018-12-27 | 2019-03-08 | 山西双环重工集团有限公司 | Three seven port valves and stamping equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1271339C (en) | 2006-08-23 |
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