CN113418023B - Reversing valve capable of being switched at high frequency - Google Patents
Reversing valve capable of being switched at high frequency Download PDFInfo
- Publication number
- CN113418023B CN113418023B CN202110134323.XA CN202110134323A CN113418023B CN 113418023 B CN113418023 B CN 113418023B CN 202110134323 A CN202110134323 A CN 202110134323A CN 113418023 B CN113418023 B CN 113418023B
- Authority
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- China
- Prior art keywords
- oil
- hole
- valve core
- working oil
- oil return
- 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.)
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- 238000007789 sealing Methods 0.000 claims abstract description 41
- 239000003921 oil Substances 0.000 claims description 110
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/36—Features relating to lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
- F16K31/061—Sliding valves
- F16K31/0613—Sliding valves with cylindrical slides
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention provides a reversing valve capable of being switched at high frequency, and belongs to the field of reversing valve manufacturing; the invention comprises the following steps: a housing and a valve core; the shell is internally provided with a high-pressure oil port, two different working oil ports and two oil return ports; the oil return hole is arranged between each working oil port and the adjacent oil return port; the valve core is slidably sleeved in the shell; the valve core slides to one side to open the working oil hole and the oil return hole at the other side; the valve core is provided with two shoulder sealing surfaces; the left side and the right side of each shoulder sealing surface are respectively used for sealing the working oil hole and the oil return hole; when the valve core is in the middle state, buffer grooves are formed in the contact surfaces of the shoulder sealing surface, the working oil hole and the oil return hole. According to the invention, the buffer grooves are arranged on the sealing surfaces of the oil return hole and the working oil hole, so that the pressure impact generated by the actuating element during starting or stopping is effectively improved, and the technical effect of high-frequency switching is achieved.
Description
Technical Field
The invention relates to a valve manufacturing technology, in particular to a reversing valve capable of being switched at high frequency, and belongs to the technical field of hydraulic equipment manufacturing.
Background
The reversing valve is very commonly applied as a hydraulic element for controlling the on-off and reversing of an oil way. The common reversing valve is of a slide valve type structure, a valve core of the common reversing valve slides in a valve body, and different oil ports are communicated or closed through reversing of the switching valve core.
The ejection action of the injection molding machine adopts an electromagnetic reversing valve to control a single-acting oil cylinder to drive an ejection mechanism to realize the ejection action; the push-out valve is required to be switched quickly in operation, is stable in push-out, and cannot self-move when stopped. Because the electromagnetic reversing valve in the prior art is of a slide valve type structure, when the valve core of the reversing valve is in the middle position, P/A/B/T is not communicated (the high-pressure oil port is not communicated with the working oil port), and pressure oil of the oil inlet of the electromagnetic reversing valve can infiltrate into the working oil port through a gap, so that the single-acting oil cylinder is self-propelled, and the position of the ejection mechanism is changed. In addition, in the prior art, the valve core has smaller overlapping amount at the middle position, and a buffer groove cannot be arranged, so that the oil cylinder generates impact when being started or stopped, and the quality of products and the service life of equipment are influenced.
Therefore, there is a need in the art for a reversing valve that facilitates high frequency switching and that has less hydraulic impact during the switching process.
Disclosure of Invention
The invention provides a novel reversing valve capable of being switched at high frequency, which solves the technical problem that the hydraulic impact force is overlarge when the reversing valve is frequently opened in the prior art by increasing the sealing length of a valve core and arranging a buffer groove on a sealing surface.
The reversing valve capable of being switched at high frequency comprises: a housing and a valve core; the shell is internally provided with a high-pressure oil port, two different working oil ports and two oil return ports;
the two working oil ports are respectively arranged at two sides of the high-pressure oil port and are positioned between the two oil return ports; a working oil hole is respectively arranged between the high-pressure oil port and the two working oil ports, and an oil return hole is arranged between each working oil port and the adjacent oil return port;
The valve core is slidably sleeved in the shell; the valve core slides to one side so as to open the working oil hole on the side and open the oil return hole on the other side;
The valve core is provided with two shoulder sealing surfaces; the left side and the right side of each shoulder sealing surface are respectively used for sealing the working oil hole and the oil return hole;
when the valve core is in the middle state, buffer grooves are formed in the contact surface of the shoulder sealing surface and the working oil hole and the contact surface of the shoulder sealing surface and the oil return hole.
The reversing valve capable of being switched at high frequency is characterized in that the buffer grooves are grooves with semicircular horizontal sections, and one sides of circular arcs of the two buffer grooves on each shoulder sealing surface correspond to each other.
The reversing valve capable of being switched at high frequency is characterized in that rectangular equalizing grooves are further formed in the left side and the right side of each shoulder sealing surface;
the rectangular pressure equalizing groove is an annular structure groove with a rectangular cross section, and the annular structure groove is arranged on the radial surface of the shoulder sealing surface; the rectangular equalizing groove is intersected with the buffer groove.
The reversing valve capable of being switched at high frequency is characterized in that a plurality of lubricating oil grooves are further arranged on two shoulder sealing surfaces.
The reversing valve capable of being switched at high frequency, wherein the length of each shoulder sealing surface is 13.6mm, and the lengths of the working oil hole and the oil return hole are 3-3.6mm.
The reversing valve capable of being switched at high frequency is characterized in that electromagnets are respectively arranged on two sides of the shell, and two ends of each electromagnet are respectively contacted with two ends of the valve core.
The reversing valve capable of being switched at high frequency is characterized in that the electromagnets are provided with the driving rods, and the electromagnets are connected with the end parts of the valve cores through the driving rods;
and a pre-tightening spring is further arranged between the driving rod and the valve core.
According to the reversing valve capable of being switched at high frequency, the buffer grooves are formed in the sealing surfaces of the oil return hole and the working oil hole, so that pressure impact generated by an executing element during starting or stopping is effectively improved, and the technical effect of being switched at high frequency is achieved.
Drawings
FIG. 1 is a schematic cross-sectional view of a reversing valve switchable at high frequency according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of the valve core in fig. 1.
Detailed Description
The high-frequency switchable reversing valve of the invention can be made of the following materials, and is not limited to the following materials, for example: valve core, hydraulic matching system, electric control device and other common components.
FIG. 1 is a schematic cross-sectional view of a reversing valve switchable at high frequency according to an embodiment of the present invention; fig. 2 is a schematic diagram of the valve core in fig. 1.
The reversing valve capable of being switched at high frequency comprises: a housing 1 and a valve core 2; the shell 1 is internally provided with a high-pressure oil port P, two different working oil ports (specifically a working oil port A and a working oil port B) and two oil return ports T.
The two working oil ports (A and B) are respectively arranged at two sides of the high-pressure oil port P and are positioned between the two oil return ports T; the high-pressure oil port P and the two working oil ports (A and B) are respectively provided with a working oil hole 11, and an oil return hole 12 is arranged between each working oil port and the adjacent oil return port.
The valve core 2 is slidably sleeved in the shell 1; the valve core 2 slides to one side so that the working oil hole 11 on the side is opened and the oil return hole 12 on the other side is opened; p is communicated with A to the left, and P is communicated with B to the right, so that high-pressure oil is led to the working oil port, and reversing action is performed.
Two shoulder sealing surfaces are arranged on the valve core 2; the left side and the right side of each shoulder sealing surface are respectively used for sealing the working oil hole and the oil return hole;
As shown in fig. 2, when the valve element 2 is in the intermediate state, buffer grooves 20 are provided on the contact surfaces of the shoulder sealing surface and the oil return hole 12.
In general, the high-pressure oil port P is connected to a hydraulic pump 6 in the hydraulic system for discharging high-pressure hydraulic oil through a high-pressure oil pipe P.
The two working oil ports a and B are respectively connected with two ends of an actuating element 7 (a reversing oil cylinder in this embodiment is generally an oil cylinder for ejection action of an injection molding machine, and needs to be frequently opened) so as to facilitate the execution of reversing action through an oil inlet and outlet pipe.
The return port T is typically connected to a hydraulic tank to facilitate draining low pressure oil to the tank from the non-working side of the actuator. In the working process of the reversing valve, one working oil port is opened, the other working oil port automatically returns oil, and low-pressure oil is discharged into the oil tank.
When no external force acts on the two ends of the valve core, the valve core is in a neutral position, and the oil ports P/A/B/T are not communicated; when the P port is connected with a high-pressure oil source, the high-pressure oil must leak to A or B through the radial clearance between the sealing surface of the shoulder and the working oil hole, but because the working oil hole is provided with a buffer groove, the length of the sealing surface is longer, so that the high-pressure oil is difficult to permeate in a shutdown state, the internal leakage is reduced, and the stealing of the executive component 7 is avoided.
In this embodiment, when the valve core of the reversing valve is in the middle position and the fully-closed state of the a/B/P/T cavity is switched to the reversing state, the buffer groove is arranged on the sealing surfaces of the working oil hole and the oil return hole, so that hydraulic oil can be communicated through the buffer groove in the first time of reversing, the response speed is high, and the pressure impact generated when the oil cylinder is started or stopped is improved, so that the reversing valve is suitable for the working condition of frequent switching.
In this embodiment, the buffer grooves 20 are grooves with semicircular horizontal sections, and one sides of the circular arcs of the two buffer grooves 20 on each shoulder sealing surface are corresponding to each other.
As shown in fig. 2, the reversing valve capable of switching over at high frequency in the embodiment, wherein rectangular equalizing grooves 21 are further arranged on the left side and the right side of each shoulder sealing surface; the rectangular pressure equalizing groove 21 is an annular structure groove with a rectangular cross section, and the annular structure groove is arranged on the radial surface of the shoulder sealing surface; the rectangular equalizing tank 21 intersects with the buffer tank 20.
The rectangular equalizing groove 21 not only can effectively reduce the hydraulic clamping force of the valve core 2, so that the electromagnetic reversing valve can be normally switched after being kept at a neutral position for a long time, but also reduces the overlapping amount between the working oil port and the oil return port (A- > T and B- > T), and the rectangular equalizing groove has the advantages that when the pressure oil of the oil inlet P seeps into the working oil port A/B through a gap, the pressure oil in the working oil port A/B is leaked back to the T cavity through the rectangular equalizing groove 21 and the buffer groove 20 intersected with the rectangular equalizing groove before the pressure capable of pushing the oil cylinder to malfunction is formed, so that the pressure oil for driving the oil cylinder to malfunction cannot be built in the working oil port A/B, and the self-propelled executing element caused by internal infiltration under the shutdown state of the reversing valve is thoroughly solved.
The reversing valve switchable at high frequency in this embodiment, wherein a plurality of lubricating oil grooves 22 are further provided on both of the shoulder seal surfaces.
Because most of the lubricating oil groove 22 corresponds to the sealing surface of the sliding hole, the valve core is subjected to the suspension supporting action of oil pressure, the friction force of the valve core in movement is reduced, the hydraulic clamping force of the valve core is reduced, and the reversing valve can be normally reversed when being in a neutral position for a long time.
The length of each shoulder sealing surface of the reversing valve capable of being switched at high frequency is 13.6mm, and the lengths of the working oil hole and the oil return hole are 3-3.6mm.
In general, two sides of the housing 1 are respectively provided with an electromagnet, and two ends of the electromagnets are respectively contacted with two ends of the valve core 2.
Specifically, the electromagnets are all provided with driving rods, and the electromagnets are connected with the end parts of the valve cores through the driving rods;
a pre-tightening spring is also arranged between the driving rod and the valve core 2. The pretension spring can keep the valve core at a neutral position without external force.
According to the reversing valve capable of being switched at high frequency, the buffer grooves are formed in the sealing surfaces of the oil return hole and the working oil hole, so that pressure impact generated by an executing element during starting or stopping is effectively improved, and the technical effect of being switched at high frequency is achieved.
In addition, the reversing valve capable of being switched over at high frequency is low in manufacturing cost, compact in structural design, ingenious in structure, stable in starting and stopping, convenient to use and maintain and suitable for implementation of reversing actions of various hydraulic systems requiring frequent starting of an executing element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments. From the description of the above embodiments, it will be apparent to those skilled in the art that the above example methods may be implemented by means of a superposition of some variants plus the necessary general techniques; of course, the method can also be realized by simplifying some important technical features. Based on such understanding, the technical solution of the present invention essentially or partly contributes to the prior art is: overall function and construction, and in combination with the construction described in connection with the various embodiments of the invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (4)
1. A high frequency switchable reversing valve comprising: a housing and a valve core; the shell is internally provided with a high-pressure oil port, two different working oil ports and two oil return ports;
the two working oil ports are respectively arranged at two sides of the high-pressure oil port and are positioned between the two oil return ports; a working oil hole is respectively arranged between the high-pressure oil port and the two working oil ports, and an oil return hole is arranged between each working oil port and the adjacent oil return port;
The valve core is slidably sleeved in the shell; the valve core slides to one side so as to open the working oil hole on the side and open the oil return hole on the other side;
The valve core is provided with two shoulder sealing surfaces; the left side and the right side of each shoulder sealing surface are respectively used for sealing the working oil hole and the oil return hole;
When the valve core is in the middle state, buffer grooves are formed in the contact surface of the shoulder sealing surface and the working oil hole and the contact surface of the shoulder sealing surface and the oil return hole;
the buffer grooves are grooves with semicircular horizontal sections, and one sides of the circular arcs of the two buffer grooves on each shoulder sealing surface are corresponding to each other;
Rectangular equalizing grooves are also formed in the left side and the right side of each shoulder sealing surface; the rectangular pressure equalizing groove is an annular structure groove with a rectangular cross section, and the annular structure groove is arranged on the radial surface of the shoulder sealing surface; the rectangular equalizing groove is intersected with the buffer groove;
And a plurality of lubricating oil grooves are also arranged on the two shoulder sealing surfaces.
2. The high-frequency switchable reversing valve according to claim 1, wherein the length of each of the shoulder sealing surfaces is 13.6mm, and the lengths of the working oil hole and the oil return hole are 3-3.6mm.
3. The high-frequency switchable reversing valve according to claim 1, wherein electromagnets are respectively arranged on two sides of the housing, and two ends of the electromagnets are respectively contacted with two ends of the valve core.
4. The high-frequency switchable reversing valve according to claim 3, wherein the electromagnets are provided with driving rods, and the electromagnets are connected with the end parts of the valve cores through the driving rods;
and a pre-tightening spring is further arranged between the driving rod and the valve core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134323.XA CN113418023B (en) | 2021-01-29 | 2021-01-29 | Reversing valve capable of being switched at high frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110134323.XA CN113418023B (en) | 2021-01-29 | 2021-01-29 | Reversing valve capable of being switched at high frequency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113418023A CN113418023A (en) | 2021-09-21 |
| CN113418023B true CN113418023B (en) | 2024-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110134323.XA Active CN113418023B (en) | 2021-01-29 | 2021-01-29 | Reversing valve capable of being switched at high frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113418023B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958726B (en) * | 2021-10-19 | 2024-03-08 | 涌镇液压机械（上海）有限公司 | Valve core structure of internal flow reversing valve |
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| 大型化工装置离心式合成气压缩机功能结构分析;曹栋;;泸天化科技;20070615(02);全文 * |
| 大通径滑阀缝隙流场分析及试验研究;薛红军;许晓东;危敏;杨曙东;赵博;;船舶工程;20110615(03);全文 * |
| 液压系统外漏和内漏故障原因分析与排除;衷勇;;科技致富向导;20141225(36);全文 * |
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