CN218031571U - Electromagnetic reversing valve with valve core reversing time adjustable - Google Patents
Electromagnetic reversing valve with valve core reversing time adjustable Download PDFInfo
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- CN218031571U CN218031571U CN202222447083.1U CN202222447083U CN218031571U CN 218031571 U CN218031571 U CN 218031571U CN 202222447083 U CN202222447083 U CN 202222447083U CN 218031571 U CN218031571 U CN 218031571U
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Abstract
The utility model provides a valve core reversing time adjustable electromagnetic reversing valve, belonging to the reversing valve manufacturing field; the utility model discloses a: a housing and a valve core; the valve core is arranged in the shell in a sliding way; two control oil cavities are arranged in the shell, each control oil cavity is provided with an opening, two ends of the valve core are respectively positioned in the two control oil cavities, and the end part of the valve core is used for sealing the openings; an electromagnetic push rod is arranged in each control oil cavity and corresponds to the end part of the valve core; a flow passage used for communicating the two control oil cavities is arranged in the shell, and at least one throttling device is arranged on the flow passage. The utility model discloses an electromagnetic reversing valve adjusts through the throttle to runner between two installation electromagnetic push rod's the control oil pocket to can play the purpose of adjusting case action time, thereby realized the case on-off time adjustable purpose to electromagnetic reversing valve, and need not make the change to current electro-magnet, can effectively remedy the not enough of current structure.
Description
Technical Field
The utility model relates to a valve manufacturing technology especially relates to a case switching-over time adjustable electromagnetic directional valve, belongs to hydraulic equipment and makes technical field.
Background
The reversing valve is used as a hydraulic element for controlling the on-off and reversing of an oil way and is very commonly applied. The common reversing valve is of a slide valve type structure, a valve core slides in a shell, and different oil ports are communicated or closed by reversing through switching the valve core. In particular, the electromagnetic directional valve is widely applied to various aspects of industrial production due to the advantages of high automation degree, stable and reliable work, convenient layout and high reversing speed.
With the continuous expansion and change of the application field, the advantages of the electromagnetic directional valve may be the disadvantages in special specific occasions, such as the advantage of fast reversing speed. The high reversing speed of the electromagnetic reversing valve represents the good response characteristic of the valve, however, the high reversing speed usually means high pressure impact, and particularly in a high-pressure system, the pressure impact can reach 3-4 times of the working pressure sometimes. Fast commutation speeds often imply large instabilities and vibrations and noise, and in control systems with feedback control of the pressure also often imply a high risk of malfunction.
The conventional method for adjusting the reversing speed of the valve core of the reversing valve is to change the size of a damping hole in an armature of an electromagnet, so that the armature delays the actuating speed of the armature due to the damping effect of the damping hole at the moment when the armature is actuated by electromagnetic force, further delays the actuating speed of the main valve core, and achieves the purpose of changing the reversing time of the reversing valve. However, the method for adjusting the reversing speed of the reversing valve has the following defects: due to different practical use working conditions, the requirements for the reversing time of a specific reversing valve core of the reversing valve are different, the corresponding specific requirements for the damping hole of the armature of the electromagnet are different, the reversing speed of the complicated and various electromagnetic reversing valves is met, the armature with various specifications is developed by the conventional method, the production period is long, the cost is high, and the various market requirements can not be met timely and efficiently.
The change of the valve core reversing time of the electromagnetic reversing valve means that the valve core valve port of the reversing valve has the effect of gradually opening and closing, which has important significance for improving and solving various adverse effects caused by the over-high reversing speed of the reversing valve, and greatly expands the application space of the electromagnetic reversing valve; therefore, there is a need in the art for a solenoid directional valve that is capable of varying the direction change time of the spool.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel case switching-over time adjustable electromagnetic directional valve through set up throttling arrangement between two control oil pockets at the case to adjust the pressure balance speed between two control oil pockets, with the nonadjustable technical problem of solving among the prior art electromagnetic directional valve case response speed.
The utility model provides an electromagnetic directional valve with adjustable case switching-over time, include: a housing and a valve cartridge; the valve core is slidably arranged in the shell;
two control oil cavities are arranged in the shell, each control oil cavity is provided with an opening, two ends of the valve core are respectively positioned in the two control oil cavities, and the end part of the valve core is used for sealing the openings; an electromagnetic push rod is arranged in each control oil cavity and corresponds to the end part of the valve core;
and a flow passage for communicating the two control oil cavities is arranged in the shell, and at least one throttling device is arranged on the flow passage.
The electromagnetic directional valve with the adjustable valve core reversing time is characterized in that the shell is provided with an installation groove, and the throttling device is installed in the installation groove; the top of the mounting groove is provided with a screw opening;
the top of the throttling device is provided with a screw cap, and the throttling device is connected with the screw opening through the screw cap.
The valve core reversing time-adjustable electromagnetic reversing valve as described above, wherein the throttling device includes: the valve comprises a valve body, a conical valve core, a valve seat and a spring; a runner port is arranged in the valve body; the conical valve core is positioned between the valve seat and the runner port, and the conical valve core is abutted against the valve seat or the runner port through the spring so as to control the opening and closing of the runner port.
The electromagnetic directional valve with the adjustable valve core reversing time is characterized in that the conical valve core is provided with a throttling hole, and the throttling hole corresponds to the flow passage port.
The electromagnetic directional valve with the adjustable valve core reversing time comprises a throttle device and a valve core, wherein the throttle device further comprises: a one-way valve core; the one-way valve core is positioned between the valve seat and the flow passage port;
the one-way valve core is connected with the conical valve core through the spring; the conical valve core is abutted against the valve seat, so that the one-way valve core is abutted against the flow passage port.
The electromagnetic directional valve with the adjustable valve core reversing time is characterized in that two ends of the shell are respectively provided with an electromagnet; each electromagnet drives one electromagnetic push rod.
The electromagnetic directional valve with the adjustable valve core reversing time comprises a housing, a valve core and a valve cover, wherein the housing is internally provided with a high-pressure oil port and two working oil ports; the valve core slides leftwards or rightwards, so that a gap is formed between the radial end face of the valve core and the sliding hole, and the gap is used for communicating the high-pressure oil port with one of the working oil ports.
The electromagnetic directional valve with the adjustable valve core reversing time is characterized in that two oil return ports are further arranged in the shell, and the two oil return ports are respectively positioned on the outer sides of the two working oil ports;
the valve core slides to enable the high-pressure oil port to be communicated with one of the working oil ports and enable the other working oil port to be communicated with the oil return port.
The electromagnetic reversing valve with the adjustable valve core reversing time is characterized in that a return spring is arranged in the control oil cavity; the end part of the valve core is abutted against the control oil cavity through the return spring.
The electromagnetic directional valve with the adjustable valve core reversing time is characterized in that the throttling device is a one-way throttling valve.
The utility model discloses an electromagnetic directional valve adjusts through the throttle of runner between the control oil pocket to two installation electromagnetism push rods to can play the purpose of adjusting case action time, thereby realized the case on-off time adjustable purpose to electromagnetic directional valve, and need not make the change to current electro-magnet, can effectively remedy the not enough of current structure.
Drawings
Fig. 1 is a schematic cross-sectional view of a valve core reversing time adjustable electromagnetic directional valve according to an embodiment of the present invention in a neutral position state;
FIG. 2 is an enlarged view of M in FIG. 1;
FIG. 3 is an enlarged schematic view of a throttling device at N in FIG. 1;
FIG. 4 is an enlarged schematic view of another structure of the throttling device at N in FIG. 1;
fig. 5 is an enlarged schematic view of a throttling device with another structure at the position N in fig. 1.
Detailed Description
The electromagnetic directional valve with adjustable case switching-over time can adopt following material to make, and be not limited to following material, for example: common components such as a valve core, a hydraulic matching system, an electric control device and the like.
Fig. 1 is a schematic cross-sectional structure diagram of the valve core reversing time adjustable electromagnetic directional valve of the embodiment of the present invention in a neutral position state; this embodiment is explained with reference to fig. 2 and 3.
Do the utility model discloses case switching-over time adjustable electromagnetic directional valve includes: a housing 1 and a valve core 2; the valve core 2 is slidably arranged in the shell 1; the valve core 2 is a valve core of a reversing valve.
Two control oil cavities 20 are arranged in the shell 1, each control oil cavity 20 is provided with an opening, two ends of the valve core 2 are respectively positioned in the two control oil cavities 20, and the end part of the valve core 2 is used for sealing the openings; an electromagnetic push rod 30 is arranged in each control oil cavity 20, and the electromagnetic push rod 30 corresponds to the end part of the valve core 2.
Specifically, two ends of the shell 1 are respectively provided with an electromagnet 3; each electromagnet 3 drives one of the electromagnetic push rods 30. In the actual use process, two electromagnets 3 respectively used for controlling the electromagnetic push rods 30 are respectively arranged on two sides of the shell 1, and each electromagnet 3 drives the electromagnetic push rod 30 connected with the electromagnet 3 so as to push one end of the valve core 2, so that the valve core 2 is driven to slide, and the reversing operation is realized.
As shown in fig. 1, a flow passage 6 for communicating the two control oil chambers is arranged in the housing 1, and at least one throttling device 5 is arranged on the flow passage 6.
In general, the throttling device 5 is a one-way throttle valve, and only one-way throttling of the hydraulic oil in the flow passage 6 is achieved.
The utility model discloses an electromagnetic reversing valve adjusts through the throttle to runner between two installation electromagnetic push rod's the control oil pocket to can play the purpose of adjusting case action time, thereby realized the case on-off time adjustable purpose to electromagnetic reversing valve, and need not make the change to current electro-magnet, can effectively remedy the not enough of current structure.
In the electromagnetic directional valve with the adjustable valve element reversing time of the embodiment, under normal conditions, a high-pressure oil port P and two working oil ports (a and B) are arranged in the shell 1, a slide hole is arranged on the shell 1, and the valve element 2 is sleeved in the slide hole and seals the slide hole through a radial surface of the valve element 2; the valve core 2 slides leftwards or rightwards, so that a gap is formed between the radial end face of the valve core 2 and the sliding hole, and the gap is used for communicating the high-pressure oil port P with one of the working oil ports (A or B).
Generally, the housing 1 is provided with two slide holes, and the valve core 2 is sleeved in the two slide holes; the valve core 2 slides leftwards or rightwards, and the sliding hole on one side is opened, so that the high-pressure oil port is communicated with one of the working oil ports, and the reversing action is executed.
Generally, the high-pressure oil port is connected to a hydraulic pump in the hydraulic system, and is used for releasing high-pressure hydraulic oil through a high-pressure oil pipe.
The two working oil ports are respectively connected with two ends of the actuating element so as to execute reversing action through the oil inlet and outlet pipes.
Further, the housing 1 of the embodiment is further provided with two oil return ports (Ta and Tb), and the two oil return ports are respectively located at the outer sides of the two working oil ports;
the valve core slides to enable the high-pressure oil port to be communicated with one of the working oil ports and enable the other working oil port to be communicated with the oil return port.
The valve core 2 slides to open P-A, P-B, A-Ta and B-Tb respectively, and is used for opening the working oil port and opening the oil path between the working oil port and the oil return port T.
The working principle of the embodiment is as follows:
in the process of switching on and off of the electromagnet, the pressure in the control oil cavity 20 corresponding to each electromagnet changes, as shown in fig. 1 and fig. 2, the right electromagnet 3 is switched on, the armature moves to the left by electromagnetic attraction, the valve core 2 is pushed to actuate by the right electromagnetic push rod 30, the total accommodating cavity of the right control oil cavity 20 is increased, and the pressure Pa in the cavity is reduced. Meanwhile, the total cavity of the left control oil cavity 20 becomes small, the pressure Pb in the cavity becomes large, and Pa < Pb exists in the reversing starting process.
In general, a return spring 4 is arranged in the control oil cavity 20; the end of the valve core 2 abuts against the control oil cavity 20 through the return spring 4. When the right electromagnet 3 is powered off, the electromagnetic thrust disappears, the valve core 2 moves to the right under the action of the return spring 4, the accommodating cavity of the left control oil cavity 20 is enlarged, and the pressure in the cavity is reduced. Meanwhile, the cavity of the right side control oil cavity 20 is reduced, the pressure in the cavity is increased, and Pa is larger than Pb in the reversing reset process. The process of switching on and off the electromagnet on the left side is similar to the process, and is not described again.
The above analysis shows the imbalance of pressure in the two control oil chambers 20 during the power-on and power-off processes of the electromagnet.
The imbalance of the pressures in the two control chambers 20 during the reversal process, on the one hand, causes the pressure oil to flow from the high-pressure side to the low-pressure side through the flow channel 6, and the flow of the pressure oil is blocked by the throttling action of the throttling device 5 in the flow channel 6.
On the other hand, the unbalanced pressure of the two control chambers 20 also affects the force applied to the two sides of the valve core 2, and the unbalanced pressure always tends to hinder the valve core 2 from operating. Therefore, the reversing time of the valve core 2 is prolonged in the reversing process of the electromagnetic reversing valve. The extended time can be adjusted by the throttling effect of the throttling device (in this embodiment it is assumed that the damping effect of the armature of the electromagnet is negligible, so that the extension of the valve spool commutation time by the throttling effect is controllable).
As shown in fig. 1 and 3, the housing 1 of the electromagnetic directional valve with the valve core reversing time adjustable is provided with an installation groove, and the throttling device 5 is installed in the installation groove; the top of the mounting groove is provided with a screw opening; the top of the throttling device 5 is provided with a screw cap 50, and the throttling device 5 is connected with the screw opening through the screw cap 50.
The design of the screw port can enable the throttling device 5 to be detachably arranged on the shell, so that the throttling effect of the throttling device is adjusted, and the adjustment of the actuation time of the valve core 2 is realized.
As shown in fig. 3, 4 and 5, in the electromagnetic directional valve with an adjustable valve core direction changing time according to the present embodiment, the throttle device 5 includes: a valve body 51, a conical valve core 53, a valve seat 55 and a spring 54; a flow passage port 52 is arranged in the valve body 51; the conical valve core 53 is positioned between the valve seat 55 and the flow passage port 52, and the conical valve core 53 is abutted against the valve seat 55 or the flow passage port 52 through the spring 51 so as to control the opening and closing of the flow passage port 52.
As shown in fig. 4, the conical valve core 53 abuts against the flow passage port 52 through the spring 51; as shown in fig. 5, the conical spool 53 is abutted against the valve seat 55 by the spring 51.
Further, as shown in fig. 4 and 5, the conical valve body 53 is provided with an orifice 530, and the orifice 530 corresponds to the flow passage port 52.
The conical valve core 53 is in contact fit with the flow passage port 52 or the valve seat 55 to form a one-way control effect on hydraulic oil, at the moment, the throttling area can be changed by changing the size of the aperture of the throttling hole 530, so that the liquid resistance at the moment of reversing of the reversing valve is changed, and the change of the reversing time of the valve core is realized at most.
According to the throttling device structure (the valve seat 55 is replaced by a part of the shell 1) shown in FIG. 4, pa < Pb, pressure oil in the left control oil cavity enters the right control oil cavity through the flow passage 6 through the throttling hole 530 on the throttling device 5 in the process of electrifying the right electromagnet or powering off the left electromagnet, so that the reversing time of the valve core of the reversing valve can be changed when the right electromagnet is electrified or the left electromagnet is powered off.
Under the structure of fig. 4, when the right electromagnet is powered off or the left electromagnet is powered on, the pressure oil in the right control oil cavity overcomes the spring force to push the conical valve core 53 open to enter the throttling device, and then quickly enters the left control oil cavity through the flow passage opening 52, and at this time, the throttling device is only equivalent to a one-way valve and has no throttling function.
The structure of fig. 4 can realize the control of the action time of the valve core 2 when the right electromagnet is started; the throttle device structure shown in fig. 5 can control the operation time of the valve body 2 when the left electromagnet is activated.
The spool change over time can be varied by adjusting the size of the bore in the orifice 530 in the center of the conical spool 53.
The conical surface of the one-way valve core is provided with a variable throttling notch.
As shown in fig. 3, in the electromagnetic directional valve with an adjustable valve core reversing time according to the embodiment, the throttle device 5 further includes: a one-way valve spool 56; the check valve element 56 is located between the valve seat 55 and the flow port opening 52;
the check valve core 56 is connected with the conical valve core 53 through the spring 54; the conical valve element 53 abuts against the valve seat 55 so that the check valve element 56 abuts against the port opening 52.
As the structure of the throttling device shown in the figure 3, pa is less than Pb in the process of electrifying the right electromagnet a or powering off the left electromagnet b, the pressure oil in the left control oil cavity overcomes the spring force to push the conical valve core 53 open to enter, and enters the right control oil cavity through the throttling action of the variable throttling groove port formed by the matching of the one-way valve core 56 and the flow passage port 52, so that the valve core reversing time of the reversing valve can be changed when the electromagnet a is electrified or the electromagnet b is powered off.
When the left electromagnet b is electrified or the right electromagnet a is powered off, pa is greater than Pb, the pressure oil of the right control oil cavity pushes the one-way valve core 56 to enter the throttling device by overcoming the spring force and enters the left control oil cavity by the throttling action of the throttling hole 530 of the conical valve core 53, so that the valve core reversing time of the reversing valve can be changed when the electromagnet b is electrified or the electromagnet a is powered off.
In this example, the variable restriction orifice of the one-way valve spool 56 abuts against the port opening 52, and the restriction area of the orifice can be varied by controlling the abutment position.
The throttling device with the structure shown in FIG. 3 can realize that the reversing time of the bidirectional valve core 2 of the reversing valve can be independently changed. In order to ensure the throttling effect in two directions, a throttling groove is arranged on the contact surface of the one-way valve core 56 and the flow passage port 52, so that the throttling effect can be realized in the use process, and the influence on the normal operation of the equipment caused by the formation of a simple one-way check valve is avoided.
The one-way spool 56 functions in the same way as the conical spool 53, but for practical use, its structure may be different as long as it is possible to ensure that the throttling action is controllable. The function of the throttle groove of the check spool 56 is the same as that of the throttle hole 530 on the conical spool 53, and the spool change-over time can be changed by adjusting the sectional area of the throttle groove.
The utility model discloses a proportional reversing valve structure adopts the structural design of throttle hydraulic oil, simple structure, and low cost can effectively compensate not enough of current structure, has realized the control of switching-over valve case operating time, makes the solenoid directional valve have more extensive application scene.
The number of the embodiment of the present invention is only for description, and does not represent the advantages or disadvantages of the embodiment. Through the above description of the embodiments, those skilled in the art can clearly understand that the method of the above embodiment can be implemented by some variations and the necessary general technical superposition; but of course can also be realized by simplifying some important technical features in the upper level. Based on such understanding, the technical solution of the present invention essentially or the part contributing to the prior art is: holistic effect and structure to the cooperation the utility model discloses each embodiment the structure.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.
Claims (10)
1. The utility model provides a case switching-over time adjustable electromagnetic directional valve which characterized in that includes: a housing and a valve core; the valve core is slidably arranged in the shell;
two control oil cavities are arranged in the shell, each control oil cavity is provided with an opening, two ends of the valve core are respectively positioned in the two control oil cavities, and the end part of the valve core is used for sealing the openings; an electromagnetic push rod is arranged in each control oil cavity and corresponds to the end part of the valve core;
and a flow passage for communicating the two control oil cavities is arranged in the shell, and at least one throttling device is arranged on the flow passage.
2. The valve core reversing time adjustable electromagnetic reversing valve according to claim 1, wherein a mounting groove is formed in the housing, and the throttling device is mounted in the mounting groove; the top of the mounting groove is provided with a screw opening;
the top of the throttling device is provided with a screw cap, and the throttling device is connected with the screw opening through the screw cap.
3. The valve-core reversing time-adjustable electromagnetic reversing valve according to claim 1, wherein the throttling device comprises: the valve comprises a valve body, a conical valve core, a valve seat and a spring; a runner port is arranged in the valve body; the conical valve core is positioned between the valve seat and the runner port, and the conical valve core is abutted against the valve seat or the runner port through the spring so as to control the opening and closing of the runner port.
4. The valve core reversing time-adjustable electromagnetic reversing valve according to claim 3, wherein the conical valve core is provided with a throttling hole, and the throttling hole corresponds to the flow passage port.
5. The valve core reversing time-adjustable electromagnetic reversing valve according to claim 4, wherein the throttling device further comprises: a one-way valve core; the one-way valve core is positioned between the valve seat and the flow passage port;
the one-way valve core is connected with the conical valve core through the spring; the conical valve core abuts against the valve seat, so that the one-way valve core abuts against the flow passage port.
6. The valve core reversing time-adjustable electromagnetic reversing valve according to any one of claims 1 to 5, wherein electromagnets are respectively arranged at two ends of the shell; each electromagnet drives one of the electromagnetic push rods.
7. The valve core reversing time-adjustable electromagnetic reversing valve according to any one of claims 1 to 5, wherein a high-pressure oil port and two working oil ports are arranged in the housing, a slide hole is arranged on the housing, and the valve core is sleeved in the slide hole and seals the slide hole through a radial surface of the valve core; the valve core slides leftwards or rightwards, so that a gap is formed between the radial end face of the valve core and the sliding hole, and the gap is used for communicating the high-pressure oil port with one of the working oil ports.
8. The valve core reversing time-adjustable electromagnetic reversing valve according to claim 7, wherein two oil return ports are further formed in the housing, and the two oil return ports are located on the outer sides of the two working oil ports respectively;
the valve core slides to enable the high-pressure oil port to be communicated with one of the working oil ports, and enable the other working oil port to be communicated with the oil return port.
9. The valve core reversing time adjustable electromagnetic reversing valve according to claim 1, wherein a return spring is arranged in the control oil cavity; the end part of the valve core is abutted against the control oil cavity through the return spring.
10. The valve core reversing time adjustable electromagnetic reversing valve according to claim 1, wherein the throttling device is a one-way throttle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222447083.1U CN218031571U (en) | 2022-09-13 | 2022-09-13 | Electromagnetic reversing valve with valve core reversing time adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222447083.1U CN218031571U (en) | 2022-09-13 | 2022-09-13 | Electromagnetic reversing valve with valve core reversing time adjustable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218031571U true CN218031571U (en) | 2022-12-13 |
Family
ID=84355512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222447083.1U Active CN218031571U (en) | 2022-09-13 | 2022-09-13 | Electromagnetic reversing valve with valve core reversing time adjustable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218031571U (en) |
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2022
- 2022-09-13 CN CN202222447083.1U patent/CN218031571U/en active Active
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