CN210566578U - Multi-stage driving cylinder and multi-stage driving cartridge valve - Google Patents
Multi-stage driving cylinder and multi-stage driving cartridge valve Download PDFInfo
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- CN210566578U CN210566578U CN201921002512.6U CN201921002512U CN210566578U CN 210566578 U CN210566578 U CN 210566578U CN 201921002512 U CN201921002512 U CN 201921002512U CN 210566578 U CN210566578 U CN 210566578U
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Abstract
The embodiment of the utility model discloses a multistage driving cylinder, which comprises a cylinder body, a cylinder cover and more than two pistons which are mutually buckled; the multi-stage driving cylinder is characterized in that the piston is arranged in the containing cavity of the cylinder body, an oil supply oil way for supplying oil to the containing cavity of the cylinder body is arranged on the cylinder body, and the multi-stage driving cylinder controls the total stroke of all the pistons according to the oil supply conditions of different oil supply oil ways. Correspondingly, the utility model also discloses a multistage driven cartridge valve. The utility model discloses a multistage driving cylinder drive cartridge valve body, the aperture of segmentable accurate control cartridge valve, control is sensitive, and the reliability is high.
Description
Technical Field
The utility model relates to a cartridge valve especially relates to a multistage driving cylinder and a multistage driven cartridge valve.
Background
Cartridge valves are common elements used to control the opening and closing of hydraulic lines. For machines such as brick machines, the hydraulic flow needs to be accurately controlled through cartridge valves. The prior cartridge valve utilizes a screw rod and other mechanisms to adjust the opening degree of a valve core, can only provide oil for a fixed opening degree which is adjusted in advance when in use, and does not have the function of adjusting the opening degree of the valve core.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem that will solve provides a multistage actuating cylinder, its piston accessible hydraulic pressure segmentation accurate control total stroke to the aperture of the device of accurate control even income, the reaction is accurate rapidly, and the application scenario is wide.
The embodiment of the utility model provides a technical problem that solve still in, provide a multistage driven cartridge valve, but the aperture of segmentation accurate control cartridge valve, control is sensitive, and the reliability is high.
In order to solve the technical problem, an embodiment of the present invention provides a multi-stage driving cylinder; the multistage driving cylinder comprises a cylinder body, a cylinder cover and more than two pistons which are buckled with each other; the multi-stage driving cylinder is characterized in that the piston is arranged in the containing cavity of the cylinder body, an oil supply oil way for supplying oil to the containing cavity of the cylinder body is arranged on the cylinder body, and the multi-stage driving cylinder controls the total stroke of all the pistons according to the oil supply conditions of different oil supply oil ways.
As an improvement of the scheme, for the two pistons which are mutually buckled, the bottom of the piston on the upper part is provided with a limiting column, the upper end of the piston on the lower part is provided with a clamping port matched with the limiting column, the tail end of the limiting column is provided with a stop block, and the clamping port is arranged on the outer side of the limiting column and can move up and down along the limiting column.
As an improvement of the above scheme, the piston marked at the uppermost end of the cylinder body is a top piston, the piston marked at the lowermost end of the cylinder body is a bottom piston, and an intermediate piston is positioned between the top piston and the bottom piston; the middle piston and the bottom piston are both provided with a butting part which is butted with the wall of the cavity of the cylinder body, and a first force application part which is positioned above the butting part, and the diameter of the first force application part is smaller than that of the butting part.
In an improvement of the above aspect, a second force application portion is provided at an upper portion of the top piston, the abutting portion is provided at a lower end of the second force application portion, and a diameter of the second force application portion is larger than that of the abutting portion.
Correspondingly, the embodiment also provides a multi-stage driving cartridge valve, which comprises a cartridge valve body and the multi-stage driving cylinder; the plug-in valve body comprises a valve core and a valve cup, the valve core is arranged in the valve cup, the valve cup is abutted against a cylinder body, the valve core is abutted against a piston closest to the plug-in valve body, and the valve cup is provided with a first working oil port and a second working oil port; the valve core can be driven by the piston to move for a specific distance so as to control the size of the communication section between the first working oil port and the second working oil port.
As an improvement of the above scheme, the valve cup comprises a volume balance containing cavity and a working oil containing cavity, and the volume balance containing cavity allows hydraulic oil or gas in the cavity to freely enter and exit; the working oil cavity is communicated with the first working oil port and the second working oil port.
As an improvement of the scheme, the valve cup comprises a cover plate, a control cavity is arranged in the cover plate and located below the volume balance containing cavity, and the valve core penetrates through the control cavity from the volume balance containing cavity and extends to the working oil containing cavity.
As an improvement of the above scheme, the valve core is provided with a valve core piston, the valve cup comprises a cover plate arranged at the upper end of the valve cup, the cover plate is provided with a piston containing cavity, and the valve core piston is arranged in the piston containing cavity; the piston cavity is arranged between the volume balance cavity and the control cavity and is communicated with the volume balance cavity and the control cavity.
As an improvement of the scheme, the cover plate is further provided with a pressure balance accommodating cavity, a balance oil duct is arranged in the valve core, and the balance oil duct is communicated to the pressure balance accommodating cavity from the bottom surface of the valve core.
As an improvement of the scheme, a separator is arranged at the upper part of the piston cavity, the piston cavity is separated from the volume balance cavity through a valve core, and the pressure balance cavity is formed at the upper part of the piston cavity.
As a modification of the above, the number of the pistons is 4.
Implement the embodiment of the utility model provides a, following beneficial effect has:
the utility model discloses a multistage driving cylinder drive cartridge valve body, the aperture of segmentable accurate control cartridge valve, control is sensitive, and the reliability is high.
The bottom that is located the piston on upper portion is equipped with spacing post, the upper end that is located the piston of lower part be equipped with spacing post complex joint mouth, spacing post end is equipped with the dog, the joint mouth is located the spacing post outside and can be followed spacing post and reciprocate, and the activity is smooth and easy between the piston, and is spacing reliable, can prevent effectively that hydraulic pressure is too big and cause adjacent piston destructive separation.
Drawings
FIG. 1 is a schematic diagram of the oil circuit connection of the multi-stage driving cylinder of the present invention;
fig. 2 is a schematic structural view of the multistage driving cylinder according to the present invention, in which the pistons are away from each other;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic structural view of the multistage driving cylinder according to the present invention, wherein the pistons are in a state of being close to each other;
FIG. 5 is a schematic structural view of a first embodiment of a multi-stage actuated cartridge valve of the present invention;
FIG. 6 is a schematic structural view of a second embodiment of a multi-stage actuated cartridge valve of the present invention;
fig. 7 is a schematic diagram of a third embodiment of a multi-stage actuated cartridge valve of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. Only this statement, the utility model discloses the upper and lower, left and right, preceding, back, inside and outside etc. position words that appear or will appear in the text only use the utility model discloses an attached drawing is the benchmark, and it is not right the utility model discloses a concrete restriction.
As shown in fig. 1 to 5, a first embodiment of the present invention provides a multi-stage driving cartridge valve, which includes a multi-stage driving cylinder 1 and a cartridge valve body 2. The multi-stage driving cylinder 1 comprises a cylinder body 11, a cylinder cover 12 and more than two pistons (13,14,15 and 16) which are buckled with each other; the multi-stage driving cylinder 1 is characterized in that the pistons (13,14,15,16) are arranged in the cavities of the cylinder body 11, oil supply oil paths (17a,17b,17c,17d) for supplying oil to the cavities of the cylinder body 11 are arranged on the cylinder body 11, and the total stroke of all the pistons (13,14,15,16) is controlled according to the oil supply conditions of different oil supply oil paths.
Specifically, when different oil supply paths supply oil to the cavity of the cylinder 11, the two corresponding pistons will be in a far state, so that, by supplying oil to the different oil supply paths, the hydraulic oil will be spread for the two pistons, and the multiple pistons will be correspondingly in a far or close state, further, the maximum distance between the two adjacent pistons in the far state is different, thereby combining multiple total strokes. In this embodiment, the number of the pistons is 4.
The cartridge valve body 2 comprises a valve core 21 and a valve cup 22, the valve core 21 is arranged in the valve cup 22, the valve cup 22 is abutted against the cylinder body 11, the valve core 21 is abutted against a piston closest to the cartridge valve body 2, and the valve cup 22 is provided with a first working oil port 221 and a second working oil port 222; the valve body 21 can be moved by a certain distance by the piston to control the size of the communication section between the first working oil port 221 and the second working oil port 222. The first working oil port 221 and the second working oil port 222 are respectively connected to a hydraulic pipeline for oil intake and a hydraulic pipeline for oil discharge (not shown in the figure), and the flow rate of the hydraulic pipeline for oil discharge from the hydraulic pipeline for oil intake can be controlled under the same pressure by controlling the size of the communication section between the first working oil port 221 and the second working oil port 222.
Preferably, for the two pistons buckled with each other, the bottom of the piston positioned at the upper part is provided with a limiting column 141, the upper end of the piston positioned at the lower part is provided with a clamping interface 151 matched with the limiting column 141, the tail end of the limiting column 141 is provided with a stop block 142, and the clamping interface 151 is arranged at the outer side of the limiting column 141 and can move up and down along the limiting column 141. When the clamping interface 151 moves to abut against the corresponding stop block 142, the piston at the lower part and the piston at the upper part are in a far-away state, and when the clamping interface 151 moves to contact with the bottom of the piston at the upper part, the piston at the lower part and the piston at the upper part are in an approaching state. Marking the piston positioned at the uppermost end of the cylinder 11 as a top piston 13, the piston positioned at the lowermost end of the cylinder 11 as a bottom piston 16, and an intermediate piston (14,15) positioned between the top piston 13 and the bottom piston 16; the middle pistons (14,15) and the bottom piston 16 are both provided with a contact part 143 which is in contact with the cavity wall of the cylinder 11, and a first force application part 144 which is positioned above the contact part 143, and the diameter of the first force application part 144 is smaller than that of the contact part 143. When two adjacent pistons abut against each other, the introduced hydraulic oil acts on the bottom surface 145 of the first force application portion 144 to generate a downward thrust on the lower piston, so that the two corresponding adjacent pistons are separated. The top piston 13 is provided with a second biasing portion 131 at an upper portion thereof, the abutting portion 143 is provided at a lower end of the second biasing portion 131, and the diameter of the second biasing portion 131 is larger than that of the abutting portion 143. The second biasing portion 131 can be caught at the upper end of the chamber of the cylinder 11 for accommodating the abutting portion 143, and the entire piston is prevented from coming off downward.
Preferably, the valve cup 22 includes a volume balancing cavity 223 and a working oil cavity 224, the volume balancing cavity 223 is generally connected with a return line, and hydraulic oil or gas in the cavity of the volume balancing cavity 223 is allowed to freely enter and exit, so as to compensate volume change in the volume balancing cavity 223 when the piston and the valve core 21 move. The working oil chamber 224 is communicated with the first working oil port 221 and the second working oil port 222. With this embodiment, after the valve core 21 moves downward, it needs to be moved upward and reset by the thrust applied by the first working oil port 221 or the second working oil port 222. The cartridge valve that this embodiment provided compact structure, but segmentation accurate control self aperture, control is sensitive, and the reliability is high.
Referring to fig. 6, according to the second embodiment of the present invention, the difference from the first embodiment is that the valve cup 22 includes a cover 229 disposed at the upper end thereof, the cover 229 is provided with a control chamber 225, the control chamber 225 is located below the volume balance accommodating chamber 223, and the valve core 21 extends from the volume balance accommodating chamber 223 to the working oil accommodating chamber 224 through the control chamber 225. The valve core 21 is provided with a valve core piston 211, the cover plate 229 is further provided with a piston containing cavity 226, and the valve core piston 211 is arranged in the piston containing cavity 226; the piston volume 226 is disposed between the volume balance volume 223 and the control chamber 225 and is in communication with the volume balance volume 223 and the control chamber 225. By adopting the embodiment, after the valve core 21 moves downwards, the valve core 21 can be reset upwards by introducing hydraulic oil into the control cavity 225 and removing the hydraulic pressure of the oil supply oil path, and the hydraulic pressure of the first working oil port 221 or the second working oil port 222 is not relied any more.
With reference to fig. 7, according to the third embodiment of the present invention, the difference from the second embodiment is that a pressure balance accommodating chamber 227 is further disposed in the cover plate 229, a balance oil passage 212 is disposed in the valve element 21, and the balance oil passage 212 is communicated from the bottom surface of the valve element 21 to the pressure balance accommodating chamber 227. Specifically, a partition 228 is provided in an upper portion of piston chamber 226, piston chamber 226 is isolated from volume balance chamber 223 by valve element 21, and pressure balance chamber 227 is formed in an upper portion of piston chamber 226. In this embodiment, the hydraulic pressure of the first working oil port 221 is directly communicated to the pressure balance cavity 227, so that the hydraulic pressure of the valve core 21 to the first working oil port 221 is always in a force balance state, and therefore, the valve core 21 is not affected by the pressure change of the first working oil port 221, and the descending of the valve core 21 is controlled by the stroke of the piston; the rising of the valve core 21 is controlled by the oil pressure of the control cavity 225, and the flow multi-stage precise control without being influenced by the hydraulic fluctuation is realized.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (10)
1. The multistage driving cylinder of the cartridge valve is characterized by comprising a cylinder body, a cylinder cover and more than two pistons which are buckled with each other; the multi-stage driving cylinder is characterized in that the piston is arranged in the containing cavity of the cylinder body, an oil supply oil way for supplying oil to the containing cavity of the cylinder body is arranged on the cylinder body, and the multi-stage driving cylinder controls the total stroke of all the pistons according to the oil supply conditions of different oil supply oil ways.
2. The multi-stage driving cylinder as claimed in claim 1, wherein for two pistons engaged with each other, the bottom of the upper piston is provided with a limiting post, the upper end of the lower piston is provided with a locking port engaged with the limiting post, the end of the limiting post is provided with a stopper, and the locking port is arranged outside the limiting post and can move up and down along the limiting post.
3. The multi-stage drive cylinder of claim 2, wherein the piston labeled at the uppermost end of the cylinder is a top piston, the piston labeled at the lowermost end of the cylinder is a bottom piston, and the piston labeled between the top piston and the bottom piston is an intermediate piston; the middle piston and the bottom piston are both provided with a butting part which is butted with the wall of the cavity of the cylinder body, and a first force application part which is positioned above the butting part, and the diameter of the first force application part is smaller than that of the butting part.
4. The multi-stage drive cylinder of claim 3, wherein the top piston is provided at an upper portion thereof with a second force application portion, a lower end of the second force application portion being provided with the abutment portion, and the second force application portion has a diameter larger than the abutment portion.
5. A multi-stage drive cartridge comprising a cartridge body and a multi-stage drive cylinder according to any one of claims 1 to 4;
the plug-in valve body comprises a valve core and a valve cup, the valve core is arranged in the valve cup, the valve cup is abutted against a cylinder body, the valve core is abutted against a piston closest to the plug-in valve body, and the valve cup is provided with a first working oil port and a second working oil port; the valve core can be driven by the piston to move for a specific distance so as to control the size of the communication section between the first working oil port and the second working oil port.
6. The multi-stage driven cartridge valve according to claim 5, wherein the valve cup is provided with a volume balance cavity and a working oil cavity, and the volume balance cavity allows hydraulic oil or gas in the cavity to freely enter and exit; the working oil cavity is communicated with the first working oil port and the second working oil port.
7. The multi-stage drive cartridge valve of claim 6, wherein the valve cup comprises a cover plate, the cover plate has a control chamber therein, the control chamber is located below the volume balance chamber, and the valve element extends from the volume balance chamber through the control chamber to the working oil chamber.
8. The multi-stage drive cartridge valve of claim 7, wherein the valve cartridge has a valve cartridge piston, the cover plate further has a piston cavity, and the valve cartridge piston is disposed in the piston cavity; the piston cavity is arranged between the volume balance cavity and the control cavity and is communicated with the volume balance cavity and the control cavity.
9. The multi-stage actuated cartridge valve of claim 8 wherein said cover further defines a pressure balance volume, and wherein said valve core defines a balance oil passage extending from a bottom surface of said valve core to said pressure balance volume.
10. The multi-stage actuated cartridge valve of claim 9 wherein a partition is provided in the upper portion of said piston volume, separating the piston volume from the volume balance volume by a valve plug, said pressure balance volume being formed in the upper portion of the piston volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921002512.6U CN210566578U (en) | 2019-06-27 | 2019-06-27 | Multi-stage driving cylinder and multi-stage driving cartridge valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921002512.6U CN210566578U (en) | 2019-06-27 | 2019-06-27 | Multi-stage driving cylinder and multi-stage driving cartridge valve |
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| Publication Number | Publication Date |
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| CN210566578U true CN210566578U (en) | 2020-05-19 |
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| CN201921002512.6U Active CN210566578U (en) | 2019-06-27 | 2019-06-27 | Multi-stage driving cylinder and multi-stage driving cartridge valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296262A (en) * | 2019-06-27 | 2019-10-01 | 佛山市恒力泰机械有限公司 | A kind of multiple drive power cylinder and a kind of inserted valve of multiple drive power |
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2019
- 2019-06-27 CN CN201921002512.6U patent/CN210566578U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296262A (en) * | 2019-06-27 | 2019-10-01 | 佛山市恒力泰机械有限公司 | A kind of multiple drive power cylinder and a kind of inserted valve of multiple drive power |
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