CN104454725A - Reversing valve element - Google Patents
Reversing valve element Download PDFInfo
- Publication number
- CN104454725A CN104454725A CN201410657208.0A CN201410657208A CN104454725A CN 104454725 A CN104454725 A CN 104454725A CN 201410657208 A CN201410657208 A CN 201410657208A CN 104454725 A CN104454725 A CN 104454725A
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- annular groove
- port
- valve rod
- cavity
- star
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a reversing valve element. The reversing valve element comprises a valve sleeve and a valve rod. The valve rod is located in the valve sleeve and is coaxial with the valve sleeve. A first cavity is axially formed in the front part of the valve rod, and a second cavity is axially formed in the rear part of the valve rod. A connecting hole communicated with the first cavity is formed in the valve rod. An elastic resetting device stretching into the first cavity is arranged at the front end of the valve sleeve, and a handle assembly stretching into the second cavity is arranged at the rear end of the valve sleeve. The interior of the elastic resetting device is communicated with the first cavity. An annular communicating groove is formed in the outer wall of the valve rod. A pressure oil port, a first working oil port, a second working oil port and an oil control port are sequentially formed at intervals in the valve sleeve from front to back. The reversing valve element has the advantages that both the hydraulic reversing function and the manual reversing function are achieved, and normal work can be guaranteed through the manual reversing function when the hydraulic reversing function fails; besides, the valve rod in the reversing valve element will not be resisted by hydraulic oil in the axial direction, manual reversing can be achieved with a little strength, and therefore use and operation are convenient.
Description
Technical field
The present invention relates to a kind of spool, especially relate to a kind of changeover valve core.
Background technique
Existing changeover valve core generally includes two kinds: hydraulic type changeover valve core and manually operated type changeover valve core.Hydraulic type changeover valve core generally includes valve pocket and is positioned at valve pocket and the valve rod coaxially arranged with valve pocket, one end of valve pocket is provided with actuator port, the other end of valve pocket is provided with control hydraulic fluid port, sleeve side wall is provided with pressure oil port and returns liquid hydraulic fluid port, wherein return liquid hydraulic fluid port near control hydraulic fluid port, pressure oil port, near actuator port, is provided with the oil inlet passage be communicated with actuator port vertically in valve rod, valve rod is provided with the opening be communicated with oil inlet passage; When original state, oil inlet passage is communicated with time liquid hydraulic fluid port by the opening on valve rod, actuator port and time liquid hydraulic fluid port are in connected state, now, pressure oil port and input hydraulic pressure oil in control hydraulic fluid port, valve rod promotes to actuator port direction by the hydraulic oil in control hydraulic fluid port, opening on valve rod disconnects with time liquid hydraulic fluid port, actuator port and time liquid hydraulic fluid port are in isolation, and when the opening on valve rod moves to pressure oil port place, pressure oil port is communicated with actuator port by the opening on valve rod.Manually operated type changeover valve core is substantially identical with the structure of hydraulic type changeover valve core, and difference is only that manually operated type changeover valve core arranges Handleset replacement control hydraulic fluid port and carrys out actuate valve stem, and Handleset promotion valve rod pressure oil port is communicated with actuator port.
But in above-mentioned hydraulic type changeover valve core, when controlling hydraulic fluid port and breaking down, hydraulic type changeover valve core cannot normally work; Owing to there is hydraulic oil in the oil inlet passage in valve rod in above-mentioned manually operated type changeover valve core, when Handleset promotes valve rod, will the resistance from hydraulic oil in oil inlet passage be subject to, need larger strength to overcome resistance, use operation inconvenience.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of changeover valve core simultaneously possessing surge commutation function and manual reverse of direction function, this changeover valve core normally works by manual reverse of direction function when commutation function of surging breaks down, and valve rod can not be subject to the resistance of hydraulic oil in this changeover valve core in axis, only need less power to realize manual reverse of direction, use easy to operate.
The present invention solves the problems of the technologies described above adopted technological scheme: a kind of changeover valve core, comprise valve pocket and valve rod, described valve rod is positioned at described valve pocket and coaxially arranges with described valve pocket, it is characterized in that described valve rod front portion is provided with the first cavity vertically, described valve rod rear portion is provided with the second cavity vertically, the attachment hole be communicated with the first described cavity is provided with in described valve rod, described valve pocket front end is provided with the elasticity reset device stretched in the first described cavity, described valve pocket rear end is provided with the Handleset stretched in the second described cavity, described elasticity reset device inside is communicated with the first described cavity, described valve rod outer wall is provided with the communication groove of annular, described valve pocket is arranged at intervals with pressure oil port from front to back successively, first actuator port, second actuator port and control hydraulic fluid port, when described spool is in zero-bit state, described attachment hole is communicated with the second described actuator port, the first described actuator port is communicated with described communication groove, when passing into hydraulic oil in described control hydraulic fluid port, described valve rod moves axially towards described valve pocket front end, described elasticity reset device is compressed, in moving process, first described connection mouth and the second described actuator port disconnect, then described communication groove moves to described pressure oil port place and described pressure oil port is communicated with the first described actuator port, now described spool enters working state.
Described elasticity reset device comprises the spring seat at the front port place being fixedly mounted on described valve pocket, spring housing and the spring be set on described spring housing, described spring housing to be fixed in described spring seat and to extend in the first described cavity, between the bottom of described spring housing and the first described cavity, there is a segment distance, one end of described spring is fixedly connected with described spring seat, the other end of described spring contacts with the bottom of the first described cavity, described spring seat is provided with liquid return hole, described liquid return hole is communicated with the first described cavity by described spring housing inside.
The outer wall of described valve rod is arranged at intervals with first ring connected in star from front to back successively, second annular groove, 3rd annular groove, 4th annular groove, five rings connected in star and the 6th annular groove, the first seal ring is provided with in described first ring connected in star, the second seal ring is provided with in the second described annular groove, the 3rd seal ring is provided with in the 3rd described annular groove, the 4th seal ring is provided with in the 4th described annular groove, the 5th seal ring is provided with in described five rings connected in star, the 6th seal ring is provided with in the 6th described annular groove, described communication groove is between the second described annular groove and the 3rd described annular groove, described attachment hole is between the 3rd described annular groove and the 4th described annular groove, when described spool is in zero-bit state, described pressure oil port is between described first ring connected in star and the second described annular groove, described control hydraulic fluid port is between described five rings connected in star and the 6th described annular groove, when described spool enters working state, the 3rd described annular groove and the 4th described annular groove are between the first described actuator port and the second described actuator port, the second described actuator port is the described the 4th between annular groove and described five rings connected in star, described five rings connected in star is between the second described actuator port and described control hydraulic fluid port, described control hydraulic fluid port is between described five rings connected in star and the 6th described annular groove.This structure ensure spool attachment hole, control hydraulic fluid port, pressure oil port, the first actuator port and the second actuator port end time positive confinement, prevent leakage of oil.
The outer wall of described valve pocket is provided with the 7th annular groove, 8th annular groove, 9th annular groove and bull's eye connected in star, the 7th described annular groove, the 8th described annular groove, a seal ring and a back-up ring is respectively arranged with in the 9th described annular groove and described bull's eye connected in star, described pressure oil port is between the 7th described annular groove and the 8th described annular groove, the first described actuator port and the second described actuator port are between the 8th described annular groove and the 9th described annular groove, described control hydraulic fluid port is the described the 9th between annular groove and described bull's eye connected in star.This structure ensures in commutation process, the positive confinement between valve pocket and external devices
Described Handleset comprises handle and pressure head, the afterbody of described handle and described pressure head passes through pinned connection, the front portion of described pressure head is stretched in the second described cavity, when described spool is in zero-bit state, handle described in rotation, the described pressure head valve rod moved forward described in promotion moves forward and enters working state.
Compared with prior art, the invention has the advantages that by being provided with the first cavity vertically in valve rod front portion, valve rod rear portion is provided with the second cavity vertically, the attachment hole be communicated with the first cavity is provided with in valve rod, valve pocket front end is provided with the elasticity reset device stretched in the first cavity, valve pocket rear end is provided with the Handleset stretched in the second cavity, elasticity reset device inside is communicated with the first cavity, valve rod outer wall is provided with the communication groove of annular, valve pocket is arranged at intervals with pressure oil port from front to back successively, first actuator port, second actuator port and control hydraulic fluid port, when spool is in zero-bit state, attachment hole is communicated with the second actuator port, first actuator port is communicated with communication groove, when passing into hydraulic oil in control hydraulic fluid port, valve rod moves axially towards valve pocket front end, elasticity reset device is compressed, in moving process, first connection mouth and the second actuator port disconnect, then communication groove moves to pressure oil port place and pressure oil port is communicated with the first actuator port, now spool enters working state, realize surging commutation function thus, and surging in commutation process, connection between pressure oil port and the first actuator port is realized by communication groove, valve rod balances at axially loaded, can not be under pressure the resistance of oil port hydraulic oil, the power being applied to valve rod only needs the elastic force overcoming elasticity reset device can realize the movement of valve rod, the hydraulic oil of control oil port input small amount can promote valve rod, saving oil mass, when spool is in zero-bit state, handle with sleeve assembly, Handleset promotion valve rod moves forward and enters working state, realize manual reverse of direction function, spool of the present invention possesses surge commutation function and manual reverse of direction function simultaneously thus, and in manual reverse of direction process, because the connection between pressure oil port and the first actuator port is realized by communication groove, valve rod balances at axially loaded, can not be under pressure the resistance of oil port hydraulic oil, the power being applied to valve rod only needs the elastic force overcoming elasticity reset device can realize the movement of valve rod, less power is only needed to realize manual reverse of direction, use easy to operate.
Accompanying drawing explanation
Fig. 1 is the sectional view of spool of the present invention when zero-bit state;
Fig. 2 be spool of the present invention in working order time sectional view.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
Embodiment: a kind of changeover valve core, comprise valve pocket 1 and valve rod 2, valve rod 2 is positioned at valve pocket 1 and coaxially arranges with valve pocket 1, valve rod 1 front portion is provided with the first cavity 3 vertically, valve rod 1 rear portion is provided with the second cavity 4 vertically, the attachment hole 5 be communicated with the first cavity 3 is provided with in valve rod 1, valve pocket 1 front end is provided with the elasticity reset device stretched in the first cavity 3, valve pocket 1 rear end is provided with the Handleset stretched in the second cavity 4, elasticity reset device inside is communicated with the first cavity 3, valve rod 2 outer wall is provided with the communication groove 6 of annular, valve pocket 1 is arranged at intervals with pressure oil port P from front to back successively, first actuator port A1, second actuator port A2 and control hydraulic fluid port K, when spool is in zero-bit state, attachment hole 5 is communicated with the second actuator port A2, first actuator port A1 is communicated with communication groove 6, when passing into hydraulic oil in control hydraulic fluid port K, valve rod 2 moves axially towards valve pocket 1 front end, elasticity reset device is compressed, in moving process, first connection mouth 5 and the second actuator port A2 disconnect, then communication groove 6 moves to pressure oil port P place and pressure oil port is communicated with the first actuator port A1, now spool enters working state.
In the present embodiment, the spring 9 that elasticity reset device comprises the spring seat 7 at the front port place being fixedly mounted on valve pocket 1, spring housing 8 and is set on spring housing 8, spring housing 8 to be fixed in spring seat 7 and to extend in the first cavity 3, between spring housing 8 and the bottom of the first cavity 3, there is a segment distance, one end of spring 9 is fixedly connected with spring seat 7, the other end of spring 9 contacts with the bottom of the first cavity 3, spring seat 7 is provided with liquid return hole T, liquid return hole T is communicated with the first cavity 3 by spring housing 8 inside.
In the present embodiment, the outer wall of valve rod 2 is arranged at intervals with first ring connected in star from front to back successively, second annular groove, 3rd annular groove, 4th annular groove, five rings connected in star and the 6th annular groove, the first seal ring 10 is provided with in first ring connected in star, the second seal ring 11 is provided with in second annular groove, the 3rd seal ring 12 is provided with in 3rd annular groove, the 4th seal ring 13 is provided with in 4th annular groove, the 5th seal ring 14 is provided with in the connected in star of five rings, the 6th seal ring 15 is provided with in 6th annular groove, communication groove 6 is between the second annular groove and the 3rd annular groove, attachment hole 5 is between the 3rd annular groove and the 4th annular groove, when spool is in zero-bit state, pressure oil port P is between first ring connected in star and the second annular groove, control hydraulic fluid port K is between five rings connected in star and the 6th annular groove, when spool enters working state, 3rd annular groove and the 4th annular groove are between the first actuator port A1 and the second actuator port A2, second actuator port A2 is the 4th between annular groove and five rings connected in star, five rings connected in star is between the second actuator port A2 and control hydraulic fluid port K, control hydraulic fluid port K is between five rings connected in star and the 6th annular groove.
In the present embodiment, the outer wall of valve pocket 1 is provided with the 7th annular groove 16, 8th annular groove 17, 9th annular groove 18 and bull's eye connected in star 19, 7th annular groove 16, 8th annular groove 17, a seal ring and a back-up ring is respectively arranged with in 9th annular groove 18 and bull's eye connected in star 19, pressure oil port P is between the 7th annular groove 16 and the 8th annular groove 17, first actuator port A1 and the second actuator port A2 is between the 8th annular groove 17 and the 9th annular groove 18, control hydraulic fluid port K is between the 9th annular groove 18 and bull's eye connected in star 19.
In the present embodiment, Handleset comprises handle 20 and pressure head 21, and handle 20 is connected by bearing pin 22 with the afterbody of pressure head 21, the front portion of pressure head 21 is stretched in the second cavity 4, when spool is in zero-bit state, handle with sleeve 20, pressure head 21 moves forward and promotes valve rod 2 and move forward and enter working state.
The surge implementation procedure of commutation function of the changeover valve core of the present embodiment is: when spool is in zero-bit state, attachment hole 5 is communicated with the second actuator port A2, first actuator port A1 is communicated with communication groove 6, hydraulic oil is passed in control hydraulic fluid port K and pressure oil port P, the hydraulic oil passed in control hydraulic fluid port K is greater than the elastic force of spring 9 to valve rod 2 applied pressure, valve rod 2 moves axially towards direction, valve pocket 1 front end, spring 9 is compressed by valve rod 2, in valve rod 2 moving process, first connection mouth 5 and the second actuator port A2 disconnect, then communication groove 6 moves to pressure oil port P place and pressure oil port is communicated with the first actuator port A1, the hydraulic oil at pressure oil port P place enters the first actuator port A1 and flows to working oil district, now spool enters working state, when spool needs to be switched to zero-bit state from working state, stop passing into hydraulic oil in control hydraulic fluid port K, the elastic force of spring 9 is greater than control hydraulic fluid port K place hydraulic oil to valve rod 2 applied pressure, spring 9 extends and resets, valve rod 2 gets back to zero working state, first actuator port A1 is communicated with communication groove 6, now attachment hole 5 be communicated with the second actuator port A2 by working oil district with return liquid zone be communicated with, the hydraulic oil in working oil district flows to go back to liquid zone.
The implementation procedure of the changeover valve core manual reverse of direction function of the present embodiment is: when spool is in zero-bit state, attachment hole 5 is communicated with the second actuator port A2, first actuator port A1 is communicated with communication groove 6, hydraulic oil is passed in pressure oil port P, handle with sleeve 20 pairs of pressure heads 21 apply active force forward, this active force acts on valve rod 2 and is greater than the elastic force of spring 9, valve rod 2 moves axially towards direction, valve pocket 1 front end, spring 9 is compressed by valve rod 2, in valve rod 2 moving process, first connection mouth 5 and the second actuator port A2 disconnect, then communication groove 6 moves to pressure oil port P place and pressure oil port is communicated with the first actuator port A1, the hydraulic oil at pressure oil port P place enters the first actuator port A1 and flows to working oil district, now spool enters working state, when spool needs to be switched to zero-bit state from working state, release handle 20, pressure head 21 no longer acts on valve rod 2, spring 9 extends and resets, valve rod 2 gets back to zero working state, first actuator port A1 is communicated with communication groove 6, now attachment hole 5 be communicated with the second actuator port A2 by working oil district with return liquid zone be communicated with, the hydraulic oil in working oil district flows to go back to liquid zone.
In the present embodiment, working oil district and pressure oil district is communicated with by communication groove 6, when zero-bit working state, poppet shaft is to stress balance, when commutation function is surged in use, only need pass into a small amount of hydraulic oil at control hydraulic fluid port K place, ensure that control hydraulic fluid port K place hydraulic oil can realize the movement of valve rod 2 to the elastic force that the axial force that valve rod 2 applies is greater than spring 9, the use amount of saving hydraulic oil; When using manual reverse of direction function, only need to use less strength handle with sleeve 20 can realize the movement of valve rod 2 to the elastic force overcoming spring 9, simple to operate, and structure can be used simple and the handle of small volume realizes, save cost.
Claims (5)
1. a changeover valve core, comprise valve pocket and valve rod, described valve rod is positioned at described valve pocket and coaxially arranges with described valve pocket, it is characterized in that described valve rod front portion is provided with the first cavity vertically, described valve rod rear portion is provided with the second cavity vertically, the attachment hole be communicated with the first described cavity is provided with in described valve rod, described valve pocket front end is provided with the elasticity reset device stretched in the first described cavity, described valve pocket rear end is provided with the Handleset stretched in the second described cavity, described elasticity reset device inside is communicated with the first described cavity, described valve rod outer wall is provided with the communication groove of annular, described valve pocket is arranged at intervals with pressure oil port from front to back successively, first actuator port, second actuator port and control hydraulic fluid port, when described spool is in zero-bit state, described attachment hole is communicated with the second described actuator port, the first described actuator port is communicated with described communication groove, when passing into hydraulic oil in described control hydraulic fluid port, described valve rod moves axially towards described valve pocket front end, described elasticity reset device is compressed, in moving process, first described connection mouth and the second described actuator port disconnect, then described communication groove moves to described pressure oil port place and described pressure oil port is communicated with the first described actuator port, now described spool enters working state.
2. a kind of changeover valve core according to claim 1, it is characterized in that described elasticity reset device comprises the spring seat at the front port place being fixedly mounted on described valve pocket, spring housing and the spring be set on described spring housing, described spring housing to be fixed in described spring seat and to extend in the first described cavity, between the bottom of described spring housing and the first described cavity, there is a segment distance, one end of described spring is fixedly connected with described spring seat, the other end of described spring contacts with the bottom of the first described cavity, described spring seat is provided with liquid return hole, described liquid return hole is communicated with the first described cavity by described spring housing inside.
3. a kind of changeover valve core according to claim 1, the outer wall that it is characterized in that described valve rod is arranged at intervals with first ring connected in star from front to back successively, second annular groove, 3rd annular groove, 4th annular groove, five rings connected in star and the 6th annular groove, the first seal ring is provided with in described first ring connected in star, the second seal ring is provided with in the second described annular groove, the 3rd seal ring is provided with in the 3rd described annular groove, the 4th seal ring is provided with in the 4th described annular groove, the 5th seal ring is provided with in described five rings connected in star, the 6th seal ring is provided with in the 6th described annular groove, described communication groove is between the second described annular groove and the 3rd described annular groove, described attachment hole is between the 3rd described annular groove and the 4th described annular groove, when described spool is in zero-bit state, described pressure oil port is between described first ring connected in star and the second described annular groove, described control hydraulic fluid port is between described five rings connected in star and the 6th described annular groove, when described spool enters working state, the 3rd described annular groove and the 4th described annular groove are between the first described actuator port and the second described actuator port, the second described actuator port is the described the 4th between annular groove and described five rings connected in star, described five rings connected in star is between the second described actuator port and described control hydraulic fluid port, described control hydraulic fluid port is between described five rings connected in star and the 6th described annular groove.
4. a kind of changeover valve core according to claim 1, the outer wall that it is characterized in that described valve pocket is provided with the 7th annular groove, 8th annular groove, 9th annular groove and bull's eye connected in star, the 7th described annular groove, the 8th described annular groove, a seal ring and a back-up ring is respectively arranged with in the 9th described annular groove and described bull's eye connected in star, described pressure oil port is between the 7th described annular groove and the 8th described annular groove, the first described actuator port and the second described actuator port are between the 8th described annular groove and the 9th described annular groove, described control hydraulic fluid port is the described the 9th between annular groove and described bull's eye connected in star.
5. a kind of changeover valve core according to claim 1, it is characterized in that described Handleset comprises handle and pressure head, the afterbody of described handle and described pressure head passes through pinned connection, the front portion of described pressure head is stretched in the second described cavity, when described spool is in zero-bit state, handle described in rotation, the described pressure head valve rod moved forward described in promotion moves forward and enters working state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410657208.0A CN104454725B (en) | 2014-11-18 | 2014-11-18 | A kind of reversing valve core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410657208.0A CN104454725B (en) | 2014-11-18 | 2014-11-18 | A kind of reversing valve core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104454725A true CN104454725A (en) | 2015-03-25 |
| CN104454725B CN104454725B (en) | 2017-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410657208.0A Active CN104454725B (en) | 2014-11-18 | 2014-11-18 | A kind of reversing valve core |
Country Status (1)
| Country | Link |
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| CN (1) | CN104454725B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691836A (en) * | 2018-06-14 | 2018-10-23 | 东莞海特帕沃液压科技有限公司 | A kind of hydraulic control-hand-operated double controlled proportioning valve |
| CN110553081A (en) * | 2019-09-29 | 2019-12-10 | 上海羿弓精密科技有限公司 | Hydraulic reversing valve and hydraulic reversing device |
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| CN103727085A (en) * | 2014-01-20 | 2014-04-16 | 谭荣祥 | Hydraulic reversing valve structure |
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| CN204344559U (en) * | 2014-11-18 | 2015-05-20 | 宁波长壁流体动力科技有限公司 | A kind of changeover valve core |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1411505A (en) * | 1973-06-22 | 1975-10-29 | Clerk R C | Spool valves |
| US4240467A (en) * | 1979-01-15 | 1980-12-23 | Blatt L Douglas | Valve assembly |
| CN2054106U (en) * | 1989-05-05 | 1990-03-07 | ***长沙建筑机械研究所 | Multiple-way change valve with single valve stem |
| JP4415357B2 (en) * | 2006-02-08 | 2010-02-17 | 吉冨 昭三 | Cylinder operating direction switching device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691836A (en) * | 2018-06-14 | 2018-10-23 | 东莞海特帕沃液压科技有限公司 | A kind of hydraulic control-hand-operated double controlled proportioning valve |
| CN110553081A (en) * | 2019-09-29 | 2019-12-10 | 上海羿弓精密科技有限公司 | Hydraulic reversing valve and hydraulic reversing device |
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| Publication number | Publication date |
|---|---|
| CN104454725B (en) | 2017-01-04 |
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