CN114278650B - Multi-way valve core displacement detection device - Google Patents
Multi-way valve core displacement detection device Download PDFInfo
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- CN114278650B CN114278650B CN202210222918.5A CN202210222918A CN114278650B CN 114278650 B CN114278650 B CN 114278650B CN 202210222918 A CN202210222918 A CN 202210222918A CN 114278650 B CN114278650 B CN 114278650B
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Abstract
The invention relates to the technical field of hydraulic auxiliary detection tools, in particular to a multi-way valve core displacement detection device. A measuring piece is inserted into the tool main body in a penetrating manner, the measuring end of the measuring piece extends into the inner cavity of the measured multi-way valve and abuts against the measured multi-way valve core of the measured multi-way valve, the measuring piece moves left and right in the tool main body along with the measured multi-way valve core, and the sensing end of the measuring piece extends out of the screw cap and is opposite to the displacement sensor; the tool main body is provided with a pilot oil port, the pilot oil port and an inner cavity of the tool main body are arranged in a through mode, an oil duct is formed in the measuring piece and communicated with an inner cavity of the measured multi-way valve, and the pilot oil port is used for feeding oil and conveying the oil into the measured multi-way valve through the oil duct so as to achieve oil feeding work of a measuring end. The valve core displacement can be directly measured by a common sensor on the market without a specially-made or special displacement sensor, and the normal work of the measured valve is not interfered; no need to replace or tailor the end caps; and no sealing element is arranged between the whole measuring rod and the tool main body and is sealed through a gap.
Description
Technical Field
The invention relates to the technical field of hydraulic auxiliary detection tools, in particular to a multi-way valve core displacement detection device.
Background
The hydraulic transmission has the advantages of large power-mass ratio, easy speed regulation, stable work and the like, and is widely applied to the fields of engineering machinery, walking machinery, aerospace, ocean engineering and the like. The hydraulic valve is a kind of hydraulic element which is most commonly used in a hydraulic system, and the working stability of the hydraulic valve directly influences the working performance of the whole hydraulic system. The working state of the valve can be intuitively known from the valve core displacement condition, so that the real-time displacement of the valve core is necessary to be measured.
However, the conventional multi-way valve core displacement detection device is disclosed in the patent number: CN202020794623.1, patent name: a hydraulic valve spool displacement detection device, patent no: CN201320623319.0, patent name: the connection structure of the valve core of the hydraulic valve and the displacement detection device adopts a displacement sensor to directly measure, but the oil flow can not be reversed; patent numbers: CN202110394050.2, patent name: a pilot valve for measuring the displacement of the valve core of a multi-way valve adopts the pilot valve to detect the displacement of the valve core; patent numbers: CN202111056497.5, patent name: the application adopts a special sensor to measure the displacement of the valve core, but the oil can not be led to change the direction.
Therefore, there is a need for a detection device that can simultaneously perform oil passing at the measuring end without a special or dedicated displacement sensor.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the valve core displacement detection device of the multi-way valve does not need a specially-made or special displacement sensor, oil can be introduced at a measurement end while the displacement of the valve core is measured, and the valve core can be normally reversed.
The technical scheme adopted by the invention for solving the technical problems is as follows: a multi-way valve core displacement detection device comprises a tool main body, a measuring part and a displacement sensor, wherein a screw cap is installed at one end of the tool main body, the displacement sensor is arranged close to the screw cap, a measured multi-way valve is installed at the other end of the tool main body, the tool main body is of a hollow structure, the measuring part is inserted in the tool main body, the measuring end of the measuring part extends into an inner cavity of the measured multi-way valve and abuts against the measured multi-way valve core of the measured multi-way valve, the measuring part moves left and right in the tool main body along with the measured multi-way valve core, and the sensing end of the measuring part extends out of the screw cap and is arranged right opposite to the displacement sensor so as to detect the displacement of the measured multi-way valve core through the displacement sensor; the tool main body is provided with a pilot oil port, the pilot oil port and an inner cavity of the tool main body are arranged in a through mode, an oil duct is formed in the measuring piece and communicated with an inner cavity of the measured multi-way valve, and the pilot oil port is used for feeding oil and conveying the oil into the measured multi-way valve through the oil duct so as to achieve oil feeding work of a measuring end.
Further, the measuring part is divided into a measuring rod and a measuring head, the measuring rod is inserted into an inner cavity of the tool main body, the two ends of the measuring rod extend out of the tool main body, the measuring head is installed at the measuring end of the measuring rod, the measuring head extends into an inner cavity of the measured multi-way valve and supports against a valve core of the measured multi-way valve, and a limiting bulge is arranged on the measuring rod and used for separating the inner cavity of the tool main body into a left end cavity and a right end cavity.
Further, the measuring rod, the screw cap and the tool main body are concentrically arranged, gaps are sealed among the measuring rod, the screw cap and the tool main body, the distance between the measuring rod and the tool main body is 3-5 microns, the gaps can guarantee that the measuring rod and the tool main body can freely slide, and a large amount of oil does not flow out of the gaps.
Furthermore, the measuring rod is divided into a first measuring branch rod and a second measuring branch rod, an oil duct is formed in the second measuring branch rod, an oil inlet hole is formed in the left end of the second measuring branch rod and is communicated with the left end cavity of the tool main body to enable oil in the left end cavity of the tool main body to flow into the oil duct, and an oil outlet hole is formed in the right end of the second measuring branch rod to enable the oil in the oil duct to be injected into the measured multi-way valve.
Furthermore, a notch is formed in the end face of the right end of the tool main body, a pre-pressing spring is sleeved on the measuring rod, one end of the pre-pressing spring abuts against the bottom of the notch, the other end of the pre-pressing spring abuts against the measuring head, elasticity is provided for the measuring head, and the measuring head is guaranteed to always abut against the valve core of the measured multi-way valve.
Furthermore, the right end of the tool main body is further provided with an exhaust hole for exhausting gas in a cavity at the right end of the tool main body, so that the measuring rod can move in the cavity of the tool main body conveniently, and the resistance is reduced.
Further, a sealing element is arranged between the tool main body and the end cover of the tested multi-way valve.
Further, be perpendicular setting between inlet port and oil outlet and the oil duct, spacing arch is close to the inlet port setting.
Furthermore, a measuring rod cap is installed at the left end rod part of the measuring rod and is connected to the measuring rod through a measuring rod cap pin.
The invention has the beneficial effects that the defects in the background technology are overcome, and the method comprises the following steps of 1: the method has the advantages that the economy is realized, the valve core displacement can be directly measured by a common sensor on the market without a specially-made or special displacement sensor, the common displacement sensor can be used for measuring by mechanical contact leading out, and the realization cost is low;
2: the measuring method has the advantages that the measuring method is rapid, oil can be introduced into the measuring end while the displacement of the valve core is measured, so that the valve core can be normally reversed, the defect that the measured section cannot be subjected to oil introduction and reversing during measurement is overcome, and the normal work of a measured valve is not interfered;
3: the convenience is realized, the valve core displacement measuring device can be directly arranged at the valve core end cover of the measured multi-way valve, and the end cover does not need to be replaced or specially manufactured;
4: the accuracy, no sealing member passes through clearance seal between whole measuring stick and the frock main part, so can not influence case hysteresis data at the measurement valve core displacement.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a first use state diagram of the present invention;
FIG. 4 is an enlarged view of a portion of the invention at A;
FIG. 5 is a second use state diagram of the present invention;
FIG. 6 is a third use state diagram of the present invention;
in the figure: 1. the measuring device comprises a displacement sensor, 2, a measuring rod cap, 3, a measuring rod cap pin, 4, a measuring rod, 5, a screw cap, 6, a tool main body, 7, a sealing element, 8, a pre-pressing spring, 9, a measuring head, 11, a measured multi-way valve core, 12, an exhaust hole, 13, an oil inlet hole, 14, a first measuring branch rod, 15, a second measuring branch rod, 16, an oil duct, 17, an oil outlet hole, 18, a limiting bulge, 19, a notch and 20, a pilot oil port.
Detailed Description
The invention will now be described in further detail with reference to the drawings and preferred embodiments. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The multi-way valve core displacement detection device shown in figures 1-6 comprises a tool main body 6, a measurement piece and a displacement sensor 1, wherein the displacement sensor 1 is a common displacement sensor on the market, a screw cap 5 is installed at one end of the tool main body 6 through a thread, the displacement sensor 1 is arranged close to the screw cap 5, the multi-way valve to be detected is installed at the other end of the tool main body 6 through a thread, a sealing piece 7 is installed between the tool main body 6 and a middle end cover of the multi-way valve to be detected, the tool main body 6 is of a hollow structure, the measurement piece is inserted in the tool main body 6 and can stretch out and draw back in the tool main body 6, the measurement end of the measurement piece extends into an inner cavity of the multi-way valve to be detected, the measuring part moves left and right in the tool main body 6 along with the measured multi-way valve core 11, so that the displacement of the measured multi-way valve core 11 is transmitted to the measuring rod 4 of the measuring part; the induction end of the measuring piece extends out of the screw cap 5 and is arranged opposite to the displacement sensor 1, and the displacement of the measuring rod cap 2 is measured through the displacement sensor 1, so that the displacement of the valve core 11 of the measured multi-way valve is obtained;
the tool main body 6 is provided with a pilot oil port 20, the pilot oil port 20 and an inner cavity of the tool main body 6 are arranged in a penetrating mode, an oil duct 16 is formed in a measuring part and communicated with the inner cavity of the tested multi-way valve, the pilot oil port 20 is used for feeding oil and is conveyed into the tested multi-way valve through the oil duct 16, pilot oil can be conducted inside the tested multi-way valve when displacement can be detected, and the valve element 11 of the tested multi-way valve can normally move.
As shown in fig. 2, the measuring part is divided into a measuring rod 4 and a measuring head 9, the measuring rod 4 is inserted into the inner cavity of the tool main body 6, two ends of the measuring rod 4 extend out of the tool main body 6, the measuring head 9 is installed at the measuring end of the measuring rod 4 through threads, the measuring head 9 extends into the inner cavity of the measured multi-way valve and abuts against the measured multi-way valve spool 11 of the measured multi-way valve, and the measuring head 9 can be correspondingly adapted and replaced according to the length and the structure of the measured multi-way valve spool 11.
As shown in fig. 3, 5 and 6, a notch 19 is formed in the end face of the right end of the tool main body 6, a pre-pressing spring 8 is sleeved on the measuring rod 4, the elastic force of the pre-pressing spring 8 is small, one end of the pre-pressing spring 8 abuts against the bottom of the notch 19, the other end of the pre-pressing spring abuts against the measuring head 9, the measuring head 9 is provided with elastic force, and the measuring head 9 is ensured to always abut against the measured multi-way valve spool 11.
The measuring rod 4 is provided with a limiting bulge 18 for dividing the inner cavity of the tool main body 6 into a left end cavity and a right end cavity and has a certain guiding function.
In addition, as shown in fig. 4, a ring groove is formed in the wall of the inner cavity at the right end of the tool main body 6, and the diameter of the ring groove is larger than that of the inner cavity at the right end of the tool main body 6, so that the contact between the measuring rod 4 and the inner cavity of the tool main body 6 can be reduced, and the processing difficulty and the yield of the tool main body 6 are reduced.
As shown in fig. 2, the measuring rod 4 is divided into a first measuring branch rod 14 and a second measuring branch rod 15, an oil passage 16 is formed in the second measuring branch rod 15, an oil inlet 13 is formed in the left end of the second measuring branch rod 15, the oil inlet 13 is communicated with the left end cavity of the tool main body 6 and used for enabling oil in the left end cavity of the tool main body 6 to flow into the oil passage 16, and an oil outlet 17 is formed in the right end of the second measuring branch rod 15 and used for injecting the oil in the oil passage 16 into the measured multi-way valve.
Wherein, the oil inlet 13 and the oil outlet 17 are arranged vertically with the oil duct 16, and the limit protrusion 18 is arranged near the oil inlet 13.
In addition, the right end of the tool main body 6 is also provided with an exhaust hole 12 for exhausting gas in a cavity at the right end of the tool main body 6, so that the measuring rod 4 can move in the cavity of the tool main body 6 conveniently, and the resistance is reduced.
The left end rod part of the measuring rod 4 is provided with a measuring rod cap 2 and is pinned on the measuring rod 4 through a measuring rod cap pin 3.
Simultaneously, for concentric setting (being size D1, D2, D3) between measuring stick 4, spiral shell lid 5 and the 6 three of frock main part, and be clearance seal between measuring stick 4, spiral shell lid 5 and the 6 three of frock main part, the interval between measuring stick 4 and the frock main part 6 is 3 ~ 5 um.
During processing, screw cap 5 is screwed on tool main body 6 firstly, then the processing of hole is carried out by adopting a special cutter, the arrangement of the hole on screw cap 5 and the inner cavity of tool main body 6 is concentric, so that the measuring piece moves left and right in tool main body 6 along with measured multi-way valve core 11, the phenomenon of blocking does not exist, and the measured multi-way valve core 11 displacement can not influence the hysteresis data of measured multi-way valve core 11.
The working process is as follows:
as shown in fig. 3, 5 and 6, the measured multi-way valve core 11 moves rightwards, the measuring piece also moves rightwards along with the measured multi-way valve core 11, and at the moment, the displacement sensor 1 measures the distance between the measuring rod cap 2 and the measured multi-way valve core 11, so that the displacement of the measured multi-way valve core 11 can be obtained;
what go on simultaneously is the function of leading to oil, during the feed liquor: the pilot oil enters the left end cavity of the tool main body 6 through the pilot oil port 20, the pilot oil flowing into the left end cavity flows into the oil duct 16 through the oil inlet hole 13, and the pilot oil in the oil duct 16 flows into the tested multi-way valve through the oil outlet hole 17; when returning liquid: the pilot oil returns according to the original path.
While particular embodiments of the present invention have been described in the foregoing specification, various modifications and alterations to the previously described embodiments will become apparent to those skilled in the art from this description without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a multiple unit valve case displacement detection device, includes frock main part (6), measuring part and displacement sensor (1), spiral shell lid (5) are installed to the one end of frock main part (6), and displacement sensor (1) is close to spiral shell lid (5) and sets up, and the other end of frock main part (6) is installed and is surveyed multiple unit valve, its characterized in that: the tool main body (6) is of a hollow structure, a measuring piece is inserted into the tool main body (6), the measuring end of the measuring piece extends into the inner cavity of the measured multi-way valve and abuts against the measured multi-way valve core (11) of the measured multi-way valve, the measuring piece moves left and right in the tool main body (6) along with the measured multi-way valve core (11), the sensing end of the measuring piece extends out of the screw cap (5) and is arranged right opposite to the displacement sensor (1) so as to detect the displacement of the measured multi-way valve core (11) through the displacement sensor (1);
the tool main body (6) is provided with a pilot oil port (20), the pilot oil port (20) and an inner cavity of the tool main body (6) are arranged in a through mode, an oil duct (16) is formed in a measuring piece and communicated with an inner cavity of the measured multi-way valve, and oil fed from the pilot oil port (20) is conveyed into the measured multi-way valve through the oil duct (16) to achieve oil passing work of a measuring end.
2. The valve spool displacement sensing device of claim 1, further comprising: the measuring part divide into measuring stick (4) and measuring head (9), measuring stick (4) insert in the inner chamber of frock main part (6), the frock main part (6) setting is stretched out at measuring stick (4) both ends, measuring head (9) are installed to the measuring end of measuring stick (4), measuring head (9) stretch into by survey multiple unit valve inner chamber to support by surveying multiple unit valve case (11) of being surveyed the multiple unit valve, be equipped with spacing arch (18) on measuring stick (4), be used for separating the inner chamber of frock main part (6) for left end cavity and right-hand member cavity.
3. The spool displacement sensing device of claim 2, further comprising: the measuring rod (4), the screw cap (5) and the tool main body (6) are concentrically arranged, gaps are sealed among the measuring rod (4), the screw cap (5) and the tool main body (6), and the distance between the measuring rod (4) and the tool main body (6) is 3-5 um.
4. The spool displacement sensing device of claim 2, further comprising: measuring stick (4) divide into first measurement branch pole (14) and second measurement branch pole (15), oil duct (16) have been seted up in second measurement branch pole (15), oil inlet (13) have been seted up to the left end that second measurement branch pole (15), this oil inlet (13) and the left end cavity intercommunication of frock main part (6) for flow into oil duct (16) with the fluid in the frock main part (6) left end cavity, oil outlet (17) have been seted up to the right-hand member of second measurement branch pole (15), be used for pour into the fluid in oil duct (16) in being surveyed the multiple unit valve.
5. The spool displacement sensing device of claim 2, further comprising: the tool main body (6) right-hand member terminal surface on seted up notch (19), the cover is equipped with pre-compaction spring (8) on measuring stick (4), the bottom of notch (19) is supported to the one end of pre-compaction spring (8), the other end supports measuring head (9) for provide elasticity for measuring head (9), ensure that measuring head (9) support to be surveyed multiple unit valve case (11) all the time.
6. The spool displacement sensing device of claim 2, further comprising: the right end of the tool main body (6) is further provided with an exhaust hole (12) for exhausting gas in a cavity at the right end of the tool main body (6), so that the measuring rod (4) can move in the cavity of the tool main body (6) conveniently, and resistance is reduced.
7. The valve spool displacement sensing device of claim 1, further comprising: and a sealing element (7) is arranged between the tool main body (6) and the middle end cover of the tested multi-way valve.
8. The multiple unit valve spool displacement sensing device of claim 4, wherein: the oil inlet hole (13), the oil outlet hole (17) and the oil duct (16) are vertically arranged, and the limiting protrusion (18) is arranged close to the oil inlet hole (13).
9. The spool displacement sensing device of claim 2, further comprising: the left end rod part of the measuring rod (4) is provided with a measuring rod cap (2) and is in pin joint with the measuring rod (4) through a measuring rod cap pin (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210222918.5A CN114278650B (en) | 2022-03-09 | 2022-03-09 | Multi-way valve core displacement detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210222918.5A CN114278650B (en) | 2022-03-09 | 2022-03-09 | Multi-way valve core displacement detection device |
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| CN114278650A CN114278650A (en) | 2022-04-05 |
| CN114278650B true CN114278650B (en) | 2022-05-06 |
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| CN202210222918.5A Active CN114278650B (en) | 2022-03-09 | 2022-03-09 | Multi-way valve core displacement detection device |
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Citations (7)
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| CN103438807A (en) * | 2013-08-19 | 2013-12-11 | 南京理工大学 | High-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device and method |
| CN203432564U (en) * | 2013-09-06 | 2014-02-12 | 中联重科股份有限公司 | Valve core displacement measuring device |
| CN203772245U (en) * | 2014-03-06 | 2014-08-13 | 中联重科股份有限公司 | Equipment for testing displacement of hydraulic valve core |
| CN207004985U (en) * | 2017-07-06 | 2018-02-13 | 山东泰丰智能控制股份有限公司 | Hydraulic pressure valve core detects controlling organization |
| CN108361234A (en) * | 2018-02-10 | 2018-08-03 | 宁波市博尔法液压有限公司 | A kind of Multi-way valve device with intelligent flow control |
| CN113202839A (en) * | 2021-04-13 | 2021-08-03 | 中国煤炭科工集团太原研究院有限公司 | Pilot valve for measuring valve element displacement of multi-way valve |
| CN214617263U (en) * | 2021-01-04 | 2021-11-05 | 江苏恒立液压科技有限公司 | Hydraulic multi-way valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100421427B1 (en) * | 2001-01-11 | 2004-03-09 | 한국과학기술원 | High precision displacement gauge and variable displacement measuring method used a unit displacement using conforcal theory |
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2022
- 2022-03-09 CN CN202210222918.5A patent/CN114278650B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438807A (en) * | 2013-08-19 | 2013-12-11 | 南京理工大学 | High-pressure pilot-operated type pneumatic electromagnetic-valve valve element displacement measurement device and method |
| CN203432564U (en) * | 2013-09-06 | 2014-02-12 | 中联重科股份有限公司 | Valve core displacement measuring device |
| CN203772245U (en) * | 2014-03-06 | 2014-08-13 | 中联重科股份有限公司 | Equipment for testing displacement of hydraulic valve core |
| CN207004985U (en) * | 2017-07-06 | 2018-02-13 | 山东泰丰智能控制股份有限公司 | Hydraulic pressure valve core detects controlling organization |
| CN108361234A (en) * | 2018-02-10 | 2018-08-03 | 宁波市博尔法液压有限公司 | A kind of Multi-way valve device with intelligent flow control |
| CN214617263U (en) * | 2021-01-04 | 2021-11-05 | 江苏恒立液压科技有限公司 | Hydraulic multi-way valve |
| CN113202839A (en) * | 2021-04-13 | 2021-08-03 | 中国煤炭科工集团太原研究院有限公司 | Pilot valve for measuring valve element displacement of multi-way valve |
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