CN216812374U - Hydraulic filter bypass valve with safety filter element - Google Patents
Hydraulic filter bypass valve with safety filter element Download PDFInfo
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- CN216812374U CN216812374U CN202220597968.7U CN202220597968U CN216812374U CN 216812374 U CN216812374 U CN 216812374U CN 202220597968 U CN202220597968 U CN 202220597968U CN 216812374 U CN216812374 U CN 216812374U
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Abstract
The utility model discloses a hydraulic filter bypass valve with a safety filter element, which comprises a valve seat, wherein the valve seat is provided with a cylindrical inner cavity, and a screw rod is inserted into the valve seat through a screw rod insertion hole; the valve seat is downwards connected with a safety filter framework, the inner wall of the safety filter framework is attached with a filter screen, and the filter screen is enclosed into a coarse filter cavity; the bottom end of the screw is in threaded connection with a spring positioning structure, a valve core is arranged on the screw in a penetrating way, and the valve core is in sliding fit with the screw; the top end of the valve core is positioned in the inner cavity of the valve seat, the bottom of the valve core is positioned in the rough filtering cavity, and the diameter of the bottom end of the valve core is larger than that of the inner cavity of the valve seat; a spring is arranged between the valve core and the spring positioning structure in a pressing mode, an upper end opening of an inner cavity of the valve seat serves as an oil inlet end, and a circumferential side wall of the safety filter framework serves as an oil outlet end. When the filter element of the filter is not blocked, the valve core is naturally closed; when the filter element of the filter is blocked, the valve core moves downwards under the action of oil pressure and compresses the spring, hydraulic oil flows through the filter screen and is coarsely filtered at the filter screen, and large particles are prevented from entering the downstream.
Description
Technical Field
The utility model relates to the technical field of hydraulic oil filtration, in particular to a hydraulic filter-pressing bypass valve.
Background
The hydraulic oil in the hydraulic system needs to be kept clean during operation, so a filter is arranged in the hydraulic oil circuit. In order to ensure the safe and continuous work, a bypass valve is often required to be arranged in the filter so as to overcome the defect of insufficient oil supply of the system caused by the fact that the filter element cannot be replaced in time after the filter element of the filter is blocked.
When the pressure drop of the filter reaches the opening pressure drop of the bypass valve, the bypass valve is opened, and the dirty oil flows into the hydraulic oil way. This can result in excessive contamination of the system, which can cause adverse effects on various components of the system, premature wear of the system, reduced life, and even damage to the components.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a hydraulic filter bypass valve with a safety filter element, which is automatically opened when the filter element of a filter is blocked and is used for roughly filtering hydraulic oil.
In order to achieve the purpose, the hydraulic filter bypass valve with the safety filter element is used for a hydraulic oil path, is arranged in parallel with the filter element of the filter or in parallel with the filter when in use, and comprises a valve seat, wherein the valve seat is provided with a cylindrical inner cavity, the top end of the valve seat is provided with a screw insertion hole, and a screw is inserted into the screw insertion hole;
the valve seat is downwards connected with a cylindrical safety filter framework, the inner wall of the safety filter framework is provided with a filter screen for roughly filtering hydraulic oil in a fit mode, and the top end of the filter screen is in sealing fit with the valve seat through a compression joint sealing structure along the circumferential direction; the filter screen is enclosed into a coarse filter cavity;
the bottom end of the screw rod extends to the bottom of the safety filter framework, the bottom end of the screw rod is in threaded connection with a spring positioning structure, a valve core is arranged on the screw rod in a penetrating mode, and the valve core is in sliding fit with the screw rod; the top end of the valve core is positioned in the inner cavity of the valve seat, the bottom of the valve core is positioned in the rough filtering cavity and is in a conical shape with a small upper part and a big lower part, and the diameter of the bottom end of the valve core is larger than that of the inner cavity of the valve seat;
a spring is pressed between the valve core and the spring positioning structure and is used for determining the upper position and the lower position of the valve core together with the oil pressure of a hydraulic oil way; the upper end opening of the inner cavity of the valve seat is used for being communicated with an upstream hydraulic oil path and used as an oil inlet end, and the circumferential side wall of the safety filter framework is communicated with a downstream hydraulic oil path and used as an oil outlet end.
The crimping and sealing structure specifically comprises:
the top of the inner wall of the safe filter framework is provided with an annular step, the top end of the filter screen radially extends and is attached to the annular step, and the bottom end of the valve seat is inserted into the safe filter framework and tightly pressed on the filter screen at the annular step.
The spring positioning structure comprises a locknut in threaded connection with the bottom end of the screw rod, the locknut upwards supports a limiting plate, and the limiting plate is sleeved on the screw rod and used for upwards supporting the spring.
The middle part of the screw rod is radially contracted with the matched part of the valve core to form an annular groove, an annular sealing ring is arranged in the annular groove, and the screw rod is in sliding sealing fit with the valve core through the annular sealing ring.
The utility model has the following advantages:
the valve core is naturally closed under the jacking action of the spring before the service life of the filter element of the filter is up (the filter element is not blocked and the pressure drop of hydraulic oil passing through the filter element is within an allowable range), and hydraulic oil does not flow through the valve core; when a filter element of the filter is blocked, the valve core moves downwards under the action of the pressure of the raised hydraulic oil and compresses the spring, the hydraulic oil flows downstream through the filter, and the hydraulic oil is coarsely filtered when flowing through the filter screen, so that large particles are prevented from entering downstream.
When the filter element of the filter is blocked, the utility model naturally plays a role of rough filtration, and after the filter element of the filter is replaced, the utility model can be disassembled and washed for continuous use.
The annular step and other structures ensure that the valve seat and the filter screen are tightly matched, and the hydraulic oil which is not coarsely filtered due to the loose matching between the valve seat and the filter screen is prevented from flowing out of the filter screen without being filtered from the loose matching position of the valve seat and the filter screen. The spring positioning structure is convenient to mount and dismount and low in cost.
The annular groove and the annular sealing ring are arranged, so that hydraulic oil can be prevented from passing through the matching surface of the screw rod and the valve core when a filter element of the filter works normally (is not blocked), and the hydraulic oil can be prevented from passing through the screw rod and valve core when the filter element of the filter is not blocked.
Drawings
FIG. 1 is a schematic view of the closed configuration of the present invention;
fig. 2 is a schematic structural view of the valve core in an open state in the installation state of the present invention. The direction of the arrows in fig. 2 is the direction of flow of the hydraulic oil through the utility model.
Detailed Description
As shown in fig. 1 and 2, the hydraulic filter-bypass valve with a safety filter element of the utility model is used for a hydraulic oil circuit, and when in use, the hydraulic filter-bypass valve is arranged in parallel with the filter element of a filter (as a part of the filter) or in parallel with the filter (as a device in parallel with the filter), and comprises a valve seat 1, wherein the valve seat 1 is provided with a cylindrical inner cavity, the top end of the valve seat 1 is provided with a screw insertion opening 2, and a screw 3 is inserted into the screw insertion opening 2;
the valve seat 1 is downwards connected with a cylindrical safety filter framework 4, the inner wall of the safety filter framework 4 is provided with a filter screen 5 for roughly filtering hydraulic oil in a fit mode, and the top end of the filter screen 5 is in sealing fit with the valve seat 1 along the circumferential direction through a compression joint sealing structure; a coarse filtering cavity 6 is enclosed by the filtering net 5;
the bottom end of the screw rod 3 extends to the bottom of the safety filter framework 4, the bottom end of the screw rod 3 is in threaded connection with a spring positioning structure, a valve core 7 penetrates through the screw rod 3, and the valve core 7 is in sliding fit with the screw rod 3; the top end of the valve core 7 is positioned in the inner cavity of the valve seat 1, the bottom of the valve core 7 is positioned in the coarse filtration cavity 6 and is in a conical shape with a small upper part and a big lower part, and the diameter of the bottom end of the valve core 7 is larger than that of the inner cavity of the valve seat 1;
a spring 8 is pressed between the valve core 7 and the spring positioning structure, and the spring 8 is used for determining the upper position and the lower position of the valve core 7 together with the oil pressure of a hydraulic oil way; the upper end opening of the inner cavity of the valve seat 1 is used for being communicated with an upstream hydraulic oil circuit and used as an oil inlet end 9 of the utility model, and the circumferential side wall of the safety filter framework 4 is communicated with a downstream hydraulic oil circuit and used as an oil outlet end 10 of the utility model.
The utility model has simple structure and convenient manufacture, before the service life of the filter element of the filter is up (the filter element is not blocked, and the pressure drop of the hydraulic oil passing through the filter element is in an allowable range), the valve core 7 of the utility model is naturally closed under the jacking action of the spring 8, and the hydraulic oil does not flow through the utility model; when the filter element of the filter is blocked, the valve core 7 moves downwards under the action of the pressure of the raised hydraulic oil and compresses the spring 8, the hydraulic oil flows downstream through the filter, and the hydraulic oil is coarsely filtered when flowing through the filter screen 5, so that large particles are prevented from entering the downstream.
When the filter element of the filter is blocked, the utility model naturally plays a role of rough filtration, and after the filter element of the filter is replaced, the utility model can be disassembled and washed for continuous use.
The crimping sealing structure specifically comprises:
the inner wall top of the safe filter framework 4 is provided with an annular step, the top end of the filter screen 5 radially extends and is attached to the annular step to form a crimping part 11, and the bottom end of the valve seat 1 is inserted into the safe filter framework 4 and tightly pressed on the crimping part 11 of the filter screen 5 at the annular step.
The annular step and other structures ensure that the valve seat 1 and the filter screen 5 are tightly matched, and the hydraulic oil which is not coarsely filtered is prevented from flowing out of the hydraulic oil filter device without being filtered from the part where the two are not tightly matched.
The spring 8 positioning structure is convenient to mount and dismount and low in cost.
The middle part of the screw 3 is radially contracted with the valve core 7 to form an annular groove, an annular sealing ring 14 is arranged in the annular groove, and the screw 3 is in sliding sealing fit with the valve core 7 through the annular sealing ring 14.
The annular groove and the annular sealing ring 14 are arranged, so that hydraulic oil can be prevented from passing through the matching surface of the screw rod 3 and the valve core 7 when a filter element of the filter normally works (is not blocked), and the hydraulic oil can be prevented from passing through the filter element of the filter when the filter element of the filter is not blocked.
When the hydraulic oil filter is used, the hydraulic oil filter is connected with a filter element of the filter in parallel or is connected with the filter in parallel, when the filter element of the filter is blocked, the pressure of the hydraulic oil at the oil inlet end 9 of the hydraulic oil filter is naturally increased, so that the spring 8 is pressed downwards, the valve core 7 moves downwards, the conical bottom of the valve core 7 leaves the valve seat 1, and the hydraulic oil at the upstream enters the coarse filter cavity 6, is coarsely filtered by the filter screen 5 along the circumferential direction, and then flows out from the hydraulic oil filter to the downstream through the safety filter framework 4.
When the filter element of the filter is not blocked, the pressure of the hydraulic oil at the oil inlet end 9 of the filter is not increased, at the moment, the spring 8 presses the valve core 7 upwards to the bottom of the valve seat 1 and seals the inner cavity of the valve seat 1, and at the moment, the hydraulic oil does not pass through the filter element of the filter but normally flows through the filter element of the filter.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the utility model and it is intended to cover in the claims the utility model as defined in the appended claims.
Claims (4)
1. Take bypass valve is strained to hydraulic pressure of safe filter core for the hydraulic pressure oil circuit sets up or sets up with the filter core of filter in parallel during the use, including the disk seat, the disk seat has cylindric inner chamber, its characterized in that:
a screw rod inserting opening is formed in the top end of the valve seat, and a screw rod is inserted into the screw rod inserting opening;
the valve seat is downwards connected with a cylindrical safety filter framework, a filter screen for roughly filtering hydraulic oil is attached to the inner wall of the safety filter framework, and the top end of the filter screen is in sealing fit with the valve seat through a compression sealing structure along the circumferential direction; the filter screen is enclosed into a coarse filter cavity;
the bottom end of the screw rod extends to the bottom of the safety filter framework, the bottom end of the screw rod is in threaded connection with a spring positioning structure, a valve core penetrates through the screw rod, and the valve core is in sliding fit with the screw rod; the top end of the valve core is positioned in the inner cavity of the valve seat, the bottom of the valve core is positioned in the rough filtering cavity and is in a conical shape with a small upper part and a big lower part, and the diameter of the bottom end of the valve core is larger than that of the inner cavity of the valve seat;
a spring is pressed between the valve core and the spring positioning structure and is used for determining the upper position and the lower position of the valve core together with the oil pressure of a hydraulic oil way; the upper end opening of the inner cavity of the valve seat is used for being communicated with an upstream hydraulic oil path and used as an oil inlet end, and the circumferential side wall of the safety filter framework is communicated with a downstream hydraulic oil path and used as an oil outlet end.
2. The hydraulic filter bypass valve with safety filter element as recited in claim 1, wherein:
the crimping sealing structure specifically comprises:
the top of the inner wall of the safe filter framework is provided with an annular step, the top end of the filter screen radially extends and is attached to the annular step, and the bottom end of the valve seat is inserted into the safe filter framework and tightly pressed on the filter screen at the annular step.
3. A hydraulic filter-bypass valve with safety cartridge according to claim 1 or 2, characterized in that: the spring positioning structure comprises a locknut in threaded connection with the bottom end of the screw rod, the locknut upwards supports a limiting plate, and the limiting plate is sleeved on the screw rod and used for upwards supporting the spring.
4. A hydraulic filter-bypass valve with safety cartridge according to claim 1 or 2, characterized in that: the middle part of the screw rod is radially contracted with the matched part of the valve core to form an annular groove, an annular sealing ring is arranged in the annular groove, and the screw rod is in sliding sealing fit with the valve core through the annular sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220597968.7U CN216812374U (en) | 2022-03-18 | 2022-03-18 | Hydraulic filter bypass valve with safety filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220597968.7U CN216812374U (en) | 2022-03-18 | 2022-03-18 | Hydraulic filter bypass valve with safety filter element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216812374U true CN216812374U (en) | 2022-06-24 |
Family
ID=82044423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220597968.7U Active CN216812374U (en) | 2022-03-18 | 2022-03-18 | Hydraulic filter bypass valve with safety filter element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216812374U (en) |
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2022
- 2022-03-18 CN CN202220597968.7U patent/CN216812374U/en active Active
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