CN211693003U - Manual reversing valve with middle position spring reset - Google Patents
Manual reversing valve with middle position spring reset Download PDFInfo
- Publication number
- CN211693003U CN211693003U CN201921850938.7U CN201921850938U CN211693003U CN 211693003 U CN211693003 U CN 211693003U CN 201921850938 U CN201921850938 U CN 201921850938U CN 211693003 U CN211693003 U CN 211693003U
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- main valve
- valve core
- middle position
- spring seat
- return
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Abstract
The utility model discloses a manual reversing valve with a middle position spring reset, which comprises a main valve body, an operating cylinder body arranged right above the main valve body, a bottom plate arranged on the bottom of the main valve body, and a main valve core vertically and movably arranged on the main valve body in a penetrating way, wherein the bottom plate is provided with a concave cavity, a middle position automatic reset mechanism is arranged between the main valve body and the operating cylinder body, the top of the base is fixedly connected with the bottom of the operation cylinder body, the bottom of the base is fixedly connected with the top of the main valve body, the base is provided with a through vertical through hole, an inner cavity of the operation cylinder body, the vertical through hole, an inner cavity of the main valve body and a concave cavity are sequentially communicated, the top of the main valve core penetrates through the vertical through hole and extends into the inner cavity of the operation cylinder body, the reset spring is coaxially sleeved outside the main valve core and is positioned in the vertical through hole, and when the main valve core is positioned at the middle position, the bottom of the main valve core is positioned in the concave cavity and a pressing space is formed between the bottom of the main valve core and the cavity bottom of the concave cavity; the advantage is that it can realize meso position automatic re-setting, and the precision that resets is high, and the reliability is high, and simple to operate.
Description
Technical Field
The utility model relates to a hydraulic pressure switching-over valve especially relates to a manual reversing valve that meso position spring resets.
Background
At present, the application of a manual reversing valve in China is common, the requirement for a neutral position resetting function is obvious, the neutral position can be automatically returned when the valve is not operated, and an executing element is controlled to stop working, so that the safety of operation is guaranteed, and misoperation caused by manual misoperation is prevented.
The middle position of the existing manual reversing valve is reset by adopting two springs with the same specification to be arranged on two sides of a valve core of the manual reversing valve, and the middle position resetting function is realized by the pressure of the springs, or the middle position resetting function is realized by the self resetting force of the two-way springs by adopting a single two-way spring. The manual reversing valve with the two structures has larger volume, low middle position resetting precision and low reliability.
Disclosure of Invention
The utility model aims to solve the technical problem that a manual switching-over valve that meso position spring resets is provided, it can realize meso position automatic re-setting, and the precision that resets is high, and the reliability is high, and simple to operate.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a manual reversing valve with a middle position spring reset comprises a main valve body, an operation cylinder body arranged right above the main valve body, a bottom plate arranged on the bottom of the main valve body, and a main valve core vertically penetrating and movably arranged on the main valve body, wherein a concave cavity is formed in the bottom plate, and the manual reversing valve is characterized in that: a middle position automatic reset mechanism is arranged between the main valve body and the operating cylinder body, the middle position automatic reset mechanism comprises a base and a reset spring, the top of the base is fixedly connected with the bottom of the operating cylinder body, the bottom of the base is fixedly connected with the top of the main valve body, the base is provided with a through vertical through hole, the inner cavity of the operating cylinder body, the vertical through hole, the inner cavity of the main valve body and the concave cavity are communicated in sequence, the top of the main valve core passes through the vertical through hole and extends into the inner cavity of the operating cylinder body, the reset spring is coaxially sleeved outside the main valve core and is positioned in the vertical through hole, when the main valve core is in the middle position, the bottom of the main valve core is positioned in the concave cavity, and a pressing space is formed between the bottom of the main valve core and the cavity bottom of the concave cavity; when the main valve core is pressed down, the main valve core moves downwards to enable the return spring to be compressed downwards; when the downward pressure is cancelled, the return spring rebounds, and the main valve core moves upwards to return to the middle position; when the main valve core is pulled up, the main valve core moves upwards to enable the return spring to be compressed upwards; when the pull-up force is cancelled, the return spring rebounds, and the main valve core moves downwards to return to the middle position.
The manual reversing valve further comprises a rotating shaft which is horizontally arranged on the operating cylinder in a penetrating and movable mode, and an operating rod which is used for controlling the state of the main valve core, wherein the rotating shaft is connected with the top of the main valve core through a shifting pin, the operating rod is connected to the tail end of the rotating shaft and located outside the operating cylinder, the operating rod is vertical, the main valve core is located in a middle position when the shifting pin is horizontal, and the operating rod acts to enable the rotating shaft to rotate to drive the shifting pin to press down or pull up the main valve core.
The middle position automatic reset mechanism also comprises an upper spring seat and a lower spring seat, the upper spring seat and the lower spring seat are sleeved outside the main valve core, so that the reset spring is always limited between the upper spring seat and the lower spring seat; when the operating rod acts to enable the rotating shaft to rotate to drive the shifting pin to press down the main valve core, the main valve core moves downwards to push the upper spring seat to move downwards, and the lower spring seat does not move, so that the return spring is compressed downwards; when the acting force of the operating rod is cancelled or reversed to enable the rotating shaft to rotate oppositely so as to cancel the downward pressure of the shifting pin, the return spring rebounds, and the main valve core moves upwards to return to the middle position; when the operating rod acts to enable the rotating shaft to rotate to drive the shifting pin to pull up the main valve core, the main valve core moves upwards to pull the lower spring seat to move upwards, the upper spring seat does not move, and the return spring is compressed upwards; when the acting force of the operating rod is cancelled or reversed to enable the rotating shaft to rotate oppositely so as to cancel the pull-up force of the shifting pin, the return spring rebounds, and the main valve core moves downwards to return to the middle position. The main valve core compresses the return spring through the upper spring seat when pressed downwards, and compresses the return spring through the lower spring seat when pulled upwards.
The outer peripheral wall of the main valve core is provided with an annular flange and a shaft elastic retainer ring, the annular flange is positioned above the shaft elastic retainer ring, an annular ejector block is sleeved outside the main valve core and fixed above the shaft elastic retainer ring, an annular notch communicated with the vertical through hole is arranged on the base, when the main valve core is positioned in a middle position, the top of the upper spring seat is abutted against the lower surface of the annular flange and the bottom surface of the operating cylinder body, the bottom of the lower spring seat is abutted against the upper surface of the annular ejector block and the upper surface of the annular notch, when the main valve core is pressed downwards, the main valve core moves downwards to drive the annular flange to apply pressure to the upper spring seat to move downwards, and the lower spring seat is abutted against and kept immovably by the annular notch, when the main valve core is pulled upwards, the main valve core moves upwards to drive the annular jacking block to support the lower spring seat to move upwards, and the upper spring seat is pressed and kept immovable by the bottom of the operating cylinder body.
When the main valve core is in the middle position, the return spring is used for overcoming the friction force between the main valve core and the main valve body and the compression amount of the self weight of the main valve core. A pre-tightening force is required for overcoming the friction force between the main valve core and the main valve body and the self-weight return spring of the main valve core.
Compared with the prior art, the utility model has the advantages of:
1) the middle position automatic reset mechanism is arranged between the main valve body and the operation cylinder body, and is simple in structure and does not occupy a large amount of installation space, so that the original structure and size of the manual reversing valve are not obviously influenced.
2) This meso position automatic re-setting mechanism uses single reset spring, through spacing, makes reset spring can take place the compression and reply, utilizes the reset spring to reply the characteristic after compressing, makes the main valve core be in the meso position under normal condition, and the meso position precision of resetting is high, and the reliability is high.
Drawings
FIG. 1 is a schematic view, partially in section, of a manual reversing valve of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
fig. 3 is an enlarged schematic view of a portion B in fig. 2.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The utility model provides a manual switching-over valve that meso position spring resets, as shown in the figure, it includes main valve body 1, set up in the operation cylinder body 2 directly over main valve body 1, set up bottom plate 3 on the bottom of main valve body 1, the activity of vertically running through sets up main valve core 4 on main valve body 1, the activity of horizontally running through sets up pivot 5 on operation cylinder body 2, the action bars 6 that is used for controlling the state of main valve core 4, bottom plate 3 has a cavity 31, pivot 5 is connected with the top of main valve core 4 through dialling round pin 7, action bars 6 are connected on the end of pivot 5 and lie in the outside of operation cylinder body 2, meso position automatic re-setting mechanism 8 is provided between main valve body 1 and the operation cylinder body 2, meso position automatic re-setting mechanism 8 includes base 81, reset spring 82, upper spring seat 83 and lower spring seat 84, the top of base 81 and the bottom fixed connection of operation cylinder, the bottom of the base 81 is fixedly connected with the top of the main valve body 1, the base 81 is provided with a through vertical through hole 811, an inner cavity of the operating cylinder body 2, the vertical through hole 811, the inner cavity of the main valve body 1 and the cavity 31 are sequentially communicated, the top of the main valve core 4 penetrates through the vertical through hole 811 and extends into the inner cavity of the operating cylinder body 2, the return spring 82 is coaxially sleeved outside the main valve core 4 and is positioned in the vertical through hole 811, the upper spring seat 83 and the lower spring seat 84 are sleeved outside the main valve core 4, the return spring 82 is always limited between the upper spring seat 83 and the lower spring seat 84, the main valve core 4 is positioned in a middle position when the operating rod 6 is vertical and the shifting pin 7 is horizontal, and a pressing space 32 exists between the bottom of the main valve core 4 and the cavity 31 and the cavity bottom. When the operating rod 6 acts to enable the rotating shaft 5 to rotate to drive the shifting pin 7 to press the main valve element 4 downwards, the main valve element 4 moves downwards to push the upper spring seat 83 to move downwards, the lower spring seat 84 does not move, and the return spring 82 is compressed downwards; when the acting force of the operating rod 6 is cancelled or the action of the operating rod is reversed, the rotating shaft 5 rotates oppositely, and the downward pressure of the shifting pin 7 is cancelled, the return spring 82 rebounds, and the main valve element 4 moves upwards to return to the middle position; when the operating rod 6 acts to enable the rotating shaft 5 to rotate to drive the shifting pin 7 to pull up the main valve core 4, the main valve core 4 moves upwards to pull the lower spring seat 84 to move upwards, the upper spring seat 83 does not move, and the return spring 82 is compressed upwards; when the acting force of the operating rod 6 is cancelled or the opposite action causes the rotating shaft 5 to rotate oppositely so as to cancel the pull-up force of the shifting pin 7, the return spring 82 rebounds, and the main valve core 4 moves downwards to return to the middle position. Main spool 4 compresses return spring 82 by upper spring seat 83 when depressed, and main spool 4 compresses return spring 82 by lower spring seat 84 when pulled upward.
In this embodiment, an annular flange 41 and a shaft circlip 42 are provided on the outer peripheral wall of the main valve element 4, the annular flange 41 is located above the shaft circlip 42, an annular top block 43 is provided around the main valve element 4, the annular top block 43 is fixed above the shaft circlip 42, an annular notch 812 communicating with the vertical through hole 811 is provided on the base 81, the top of the upper spring seat 83 abuts against the lower surface of the annular flange 41 and the bottom surface of the operating cylinder 2 when the main valve element 4 is at the neutral position, the bottom of the lower spring seat 84 abuts against the upper surface of the annular top block 43 and the upper surface of the annular notch 812, the downward movement of the main valve element 4 drives the annular flange 41 to apply pressure to the upper spring seat 83 and move downward when the main valve element 4 is pressed down, the lower spring seat 84 is held by the annular notch 812, and the upward movement of the main valve element 4 drives the annular top block 43 to support the lower spring seat 84 to move upward when the, And the upper spring seat 83 is pressed and held by the bottom of the operating cylinder 2.
In the present exemplary embodiment, return spring 82 has a compression amount for overcoming the friction between main valve element 4 and main valve body 1 and the weight of main valve element 4 when main valve element 4 is in the neutral position. In order to overcome the friction between main valve element 4 and main valve body 1 and the dead weight restoring spring 82 of main valve element 4, a pre-tightening force should be applied.
Claims (5)
1. A manual reversing valve with a middle position spring reset comprises a main valve body, an operation cylinder body arranged right above the main valve body, a bottom plate arranged on the bottom of the main valve body, and a main valve core vertically penetrating and movably arranged on the main valve body, wherein a concave cavity is formed in the bottom plate, and the manual reversing valve is characterized in that: a middle position automatic reset mechanism is arranged between the main valve body and the operating cylinder body, the middle position automatic reset mechanism comprises a base and a reset spring, the top of the base is fixedly connected with the bottom of the operating cylinder body, the bottom of the base is fixedly connected with the top of the main valve body, the base is provided with a through vertical through hole, the inner cavity of the operating cylinder body, the vertical through hole, the inner cavity of the main valve body and the concave cavity are communicated in sequence, the top of the main valve core passes through the vertical through hole and extends into the inner cavity of the operating cylinder body, the reset spring is coaxially sleeved outside the main valve core and is positioned in the vertical through hole, when the main valve core is in the middle position, the bottom of the main valve core is positioned in the concave cavity, and a pressing space is formed between the bottom of the main valve core and the cavity bottom of the concave cavity; when the main valve core is pressed down, the main valve core moves downwards to enable the return spring to be compressed downwards; when the downward pressure is cancelled, the return spring rebounds, and the main valve core moves upwards to return to the middle position; when the main valve core is pulled up, the main valve core moves upwards to enable the return spring to be compressed upwards; when the pull-up force is cancelled, the return spring rebounds, and the main valve core moves downwards to return to the middle position.
2. A neutral spring return manual directional valve as set forth in claim 1 wherein: the manual reversing valve further comprises a rotating shaft which is horizontally arranged on the operating cylinder in a penetrating and movable mode, and an operating rod which is used for controlling the state of the main valve core, wherein the rotating shaft is connected with the top of the main valve core through a shifting pin, the operating rod is connected to the tail end of the rotating shaft and located outside the operating cylinder, the operating rod is vertical, the main valve core is located in a middle position when the shifting pin is horizontal, and the operating rod acts to enable the rotating shaft to rotate to drive the shifting pin to press down or pull up the main valve core.
3. A neutral spring return manual directional valve as set forth in claim 2 wherein: the middle position automatic reset mechanism also comprises an upper spring seat and a lower spring seat, the upper spring seat and the lower spring seat are sleeved outside the main valve core, so that the reset spring is always limited between the upper spring seat and the lower spring seat; when the operating rod acts to enable the rotating shaft to rotate to drive the shifting pin to press down the main valve core, the main valve core moves downwards to push the upper spring seat to move downwards, and the lower spring seat does not move, so that the return spring is compressed downwards; when the acting force of the operating rod is cancelled or reversed to enable the rotating shaft to rotate oppositely so as to cancel the downward pressure of the shifting pin, the return spring rebounds, and the main valve core moves upwards to return to the middle position; when the operating rod acts to enable the rotating shaft to rotate to drive the shifting pin to pull up the main valve core, the main valve core moves upwards to pull the lower spring seat to move upwards, the upper spring seat does not move, and the return spring is compressed upwards; when the acting force of the operating rod is cancelled or reversed to enable the rotating shaft to rotate oppositely so as to cancel the pull-up force of the shifting pin, the return spring rebounds, and the main valve core moves downwards to return to the middle position.
4. A neutral spring return manual directional valve as set forth in claim 3 wherein: the outer peripheral wall of the main valve core is provided with an annular flange and a shaft elastic retainer ring, the annular flange is positioned above the shaft elastic retainer ring, an annular ejector block is sleeved outside the main valve core and fixed above the shaft elastic retainer ring, an annular notch communicated with the vertical through hole is arranged on the base, when the main valve core is positioned in a middle position, the top of the upper spring seat is abutted against the lower surface of the annular flange and the bottom surface of the operating cylinder body, the bottom of the lower spring seat is abutted against the upper surface of the annular ejector block and the upper surface of the annular notch, when the main valve core is pressed downwards, the main valve core moves downwards to drive the annular flange to apply pressure to the upper spring seat to move downwards, and the lower spring seat is abutted against and kept immovably by the annular notch, when the main valve core is pulled upwards, the main valve core moves upwards to drive the annular jacking block to support the lower spring seat to move upwards, and the upper spring seat is pressed and kept immovable by the bottom of the operating cylinder body.
5. A neutral spring return manual directional valve as set forth in any one of claims 1 through 4 wherein: when the main valve core is in the middle position, the return spring is used for overcoming the friction force between the main valve core and the main valve body and the compression amount of the self weight of the main valve core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921850938.7U CN211693003U (en) | 2019-10-30 | 2019-10-30 | Manual reversing valve with middle position spring reset |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921850938.7U CN211693003U (en) | 2019-10-30 | 2019-10-30 | Manual reversing valve with middle position spring reset |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211693003U true CN211693003U (en) | 2020-10-16 |
Family
ID=72785948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921850938.7U Active CN211693003U (en) | 2019-10-30 | 2019-10-30 | Manual reversing valve with middle position spring reset |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211693003U (en) |
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2019
- 2019-10-30 CN CN201921850938.7U patent/CN211693003U/en active Active
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