CN109883606A - A kind of screw-type pressure buffer device and pressure sensor - Google Patents
A kind of screw-type pressure buffer device and pressure sensor Download PDFInfo
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- CN109883606A CN109883606A CN201910121943.2A CN201910121943A CN109883606A CN 109883606 A CN109883606 A CN 109883606A CN 201910121943 A CN201910121943 A CN 201910121943A CN 109883606 A CN109883606 A CN 109883606A
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- screw
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- type pressure
- buffering device
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- 239000012530 fluid Substances 0.000 claims abstract description 40
- 230000003139 buffering effect Effects 0.000 claims description 52
- 239000000945 filler Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000003313 weakening effect Effects 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The embodiment of the invention provides a kind of screw-type pressure buffer device and pressure sensors, comprising: buffer screw and liner；Wherein, one end of buffer screw is provided with the external screw thread of preset length, buffer screw is internally provided with first passage and second channel, and the end face of the other end of buffer screw is arranged in the opening of first passage, and the opening setting of second channel has externally threaded side wall in buffer screw；It is provided with third channel in liner, the internal screw thread matched with the external screw thread of buffer screw is provided in third channel, buffer screw is connect with liner by external screw thread and internal screw thread.It wherein include screw-type pressure buffer device, by the way that buffer screw and liner by being threadedly coupled is arranged, and fluid is set the channel on buffer screw and is introduced into buffer screw and liner threaded connection, it is threadedly coupled the hydraulic impulse for greatly weakening fluid, so that the fluid flowed out from liner essentially eliminates hydraulic impulse.The apparatus structure is simple, small in size and light weight.
Description
Technical Field
The embodiment of the invention relates to the technical field of sensors, in particular to a screw type pressure buffering device and a pressure sensor.
Background
A Pressure Transducer is a device or apparatus that senses a Pressure signal and converts the Pressure signal into a usable output electrical signal according to a certain rule. A pressure sensor is usually composed of a pressure sensitive element and a signal processing unit. Pressure sensors can be classified into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors according to different types of test pressures. Pressure sensors are one of the most widely used. The traditional pressure sensor is mainly based on a mechanical structure type device, and indicates pressure by deformation of an elastic element, but the structure is large in size and heavy in weight, and cannot provide electrical output. With the development of semiconductor technology, semiconductor pressure sensors have come to be developed. Its advantages are small size, light weight, high accuracy and high temp. Particularly, with the development of MEMS technology, the semiconductor sensor is miniaturized, and has low power consumption and high reliability.
Pressure pulses in the hydraulic line lead to a reduced reliability and a reduced service life of the pressure measuring device, but currently there is no effective pressure pulse damping device in the pressure sensor, and therefore there is a continuing need to provide a pressure damping device for pressure sensors.
Disclosure of Invention
Embodiments of the present invention provide a screw type pressure buffering device and a pressure sensor that overcome or at least partially solve the above problems.
In a first aspect, an embodiment of the present invention provides a screw type pressure buffering device, including: a buffer screw and a lining; wherein,
an external thread with a preset length is arranged at one end of the buffer screw, a first channel and a second channel are arranged inside the buffer screw, an opening of the first channel is arranged on the end face of the other end of the buffer screw, and an opening of the second channel is arranged on the side wall of the buffer screw with the external thread;
the lining is provided with a third channel, the third channel is provided with an internal thread matched with the external thread of the buffer screw, and the buffer screw is connected with the lining through the external thread and the internal thread.
Further, the first channel is a blind hole with an axis coinciding with the axis of the buffer screw.
Further, the second channel is a through hole penetrating through the side wall of the buffer screw.
Further, the lowest point of the opening of the second channel coincides with the starting point of the external thread of the buffer screw.
Further, a raised check ring is arranged between the other end of the buffer screw and the external thread of the buffer screw.
On the other hand, the embodiment of the invention provides a pressure sensor, which comprises a pressure core body, a filler neck and the screw type pressure buffering device; wherein,
the screw type pressure buffering device is arranged between a fluid inlet of the filler neck and the pressure core body, the fluid inlet of the filler neck is communicated with a first channel of the screw type pressure buffering device, and fluid flows into the screw type pressure buffering device through the first channel of the screw type pressure buffering device and flows out of the screw type pressure buffering device through a third channel of the screw type pressure buffering device.
The screw type pressure buffering device comprises a buffering screw and a lining which are connected through threads, and fluid is introduced into the threaded connection between the buffering screw and the lining through a channel arranged on the buffering screw, so that the hydraulic pulse of the fluid is greatly weakened through the threaded connection, and the hydraulic pulse of the fluid is basically eliminated by the fluid flowing out of the lining. The device has simple structure, small volume and light weight.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a plan sectional view of a pressure sensor including a screw type pressure buffering device according to an embodiment of the present invention;
FIG. 2 is a perspective cross-sectional view of the pressure sensor of FIG. 1 including a screw-type pressure buffer;
reference numerals:
1-a buffer screw; 2-lining;
3-a retainer ring; 4-a pressure core;
5-a filler neck; 11-a first channel;
12-a second channel; 21-third channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a screw type pressure buffering device, as shown in fig. 1-2, including: a buffer screw 1 and a lining 2; wherein,
an external thread with a preset length is arranged at one end of the buffer screw 1, a first channel 11 and a second channel 12 are arranged inside the buffer screw, an opening of the first channel 11 is arranged on the end face of the other end of the buffer screw 1, and an opening of the second channel 12 is arranged on the side wall of the buffer screw 1 with the external thread;
a third channel 21 is arranged in the lining 2, an internal thread matched with the external thread of the buffer screw 1 is arranged in the third channel 21, and the buffer screw 1 and the lining 2 are connected through the external thread and the internal thread.
The preset length of the external thread of the buffer screw 1 can be determined by calculation before the buffer screw is machined according to actual requirements. The opening of the second channel 12 is arranged in the externally threaded side wall of the buffer screw 1, so that the fluid flowing out through the opening of the second channel 12 enters the threaded connection of the buffer screw 1 and the liner 2. The screw type pressure buffer device of the embodiment of the invention is formed by connecting the buffer screw 1 and the lining 2 through threads.
Specifically, the fluid to be pressure buffered enters the buffer screw 1 through the first channel 11, and then enters the threaded connection between the buffer screw 1 and the liner 2 through the second channel 12, because the threaded connection is not completely closed, a small gap is formed for the fluid to pass through, and the fluid enters the third channel 21 through the gap of the threaded connection. In the process that the fluid passes through the threaded connection, the hydraulic pulse of the fluid can be greatly weakened, so that the buffering effect is achieved, namely the hydraulic pulse of the fluid flowing out of the third channel 21 is basically eliminated, and the safety of a subsequent detection chip is guaranteed.
According to the screw type pressure buffering device provided by the embodiment of the invention, the buffering screw and the lining are connected through threads, and fluid is introduced into the threaded connection of the buffering screw and the lining through the channel arranged on the buffering screw, so that the hydraulic pulse of the fluid is greatly weakened through the threaded connection, and the hydraulic pulse of the fluid flowing out of the lining is basically eliminated. The device has simple structure, small volume and light weight.
In the above embodiment, the first channel 11 is a blind hole whose axis coincides with the axis of the cushion screw 1.
Specifically, the diameter of the first channel 11 may be determined by calculation according to actual requirements before machining the buffer screw. Fluid flows into the cushion screw 1 through the first channel 11 and into the second channel 12.
In the above embodiment, the second channel 12 is a through hole penetrating through the side wall of the buffering screw 1.
Specifically, the diameter of the second channel 12 may be determined by calculation according to actual requirements before machining the buffer screw. Fluid flows into the threaded connection through the second passage 12.
Further, the lowest point of the opening of the second channel 12 coincides with the starting point of the external thread of the buffer screw 1.
Specifically, the lowest point of the opening of the second channel 12 coincides with the starting point of the external thread of the buffer screw 1, that is, the second channel 12 is arranged at the lowest end of the external thread, so that the fluid flowing out of the second channel 12 flows towards the third channel 21, and the efficiency is improved.
In the above embodiment, a raised retainer ring 3 is provided between the other end of the buffer screw 1 and the external thread of the buffer screw 1.
Specifically, the diameter of the retainer ring 3 is larger than that of the third channel 21, and the retainer ring is arranged between the other end of the buffer screw 1 and the external thread of the buffer screw 1, so that the retainer ring can play a role in sealing the third channel 21 and prevent the backflow of fluid.
Referring to fig. 1-2 again, the pressure sensor according to the embodiment of the present invention includes a pressure core 4, a filler neck 5, and the above-mentioned screw type pressure buffering device; wherein,
the screw type pressure buffering device is arranged between a fluid inlet of the filler neck 5 and the pressure core body 4, the fluid inlet of the filler neck is communicated with a first channel of the screw type pressure buffering device, and fluid flows into the screw type pressure buffering device through a first channel 11 in the screw type pressure buffering device and flows out of the screw type pressure buffering device through a third channel 21 in the screw type pressure buffering device.
Specifically, the screw type pressure buffering device is arranged in the filler neck 5, fluid needing pressure buffering enters the pressure sensor through a fluid inlet of the filler neck 5, enters the buffering screw 1 through the first channel 11, enters the threaded connection between the buffering screw 1 and the lining 2 through the second channel 12, a small gap is formed for the fluid to pass through due to the fact that the threaded connection is not completely closed, the fluid enters the third channel 21 through the gap of the threaded connection, and acts on the pressure core 4 after flowing out through the third channel 21. During the process of the fluid passing through the threaded connection, the hydraulic pulse of the fluid can be greatly weakened, so that the buffering effect is achieved, namely, the fluid flowing out from the third channel 21 basically eliminates the hydraulic pulse, and the safety of the pressure core body 4 is guaranteed.
Embodiments of the present invention provide a pressure sensor that includes a screw-type pressure buffer that substantially attenuates hydraulic pressure pulses of a fluid by providing a buffer screw and a liner in threaded engagement and directing the fluid through a passage provided in the buffer screw and into the buffer screw and liner threaded engagement such that the fluid flowing from the liner substantially eliminates the hydraulic pressure pulses. The device has simple structure, small volume and light weight.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A screw-type pressure buffering device, comprising: a buffer screw and a lining; wherein,
an external thread with a preset length is arranged at one end of the buffer screw, a first channel and a second channel are arranged inside the buffer screw, an opening of the first channel is arranged on the end face of the other end of the buffer screw, and an opening of the second channel is arranged on the side wall of the buffer screw with the external thread;
the lining is provided with a third channel, the third channel is provided with an internal thread matched with the external thread of the buffer screw, and the buffer screw is connected with the lining through the external thread and the internal thread.
2. A screw-type pressure buffering device according to claim 1, wherein the first channel is a blind hole having an axis coincident with the axis of the buffering screw.
3. The screw-type pressure buffering device according to claim 1, wherein the second channel is a through hole penetrating through a side wall of the buffering screw.
4. A screw-type pressure buffering device according to claim 3, wherein the lowest point of the opening of the second passage coincides with the starting point of the external thread of the buffering screw.
5. A screw-type pressure buffering device according to claim 1, wherein a raised retaining ring is provided between the other end of the buffering screw and the external thread of the buffering screw.
6. A pressure sensor, comprising a pressure core, a filler neck and a screw-type pressure buffering device according to any one of claims 1 to 5; wherein,
the screw type pressure buffering device is arranged between a fluid inlet of the filler neck and the pressure core body, the fluid inlet of the filler neck is communicated with a first channel of the screw type pressure buffering device, and fluid flows into the screw type pressure buffering device through the first channel of the screw type pressure buffering device and flows out of the screw type pressure buffering device through a third channel of the screw type pressure buffering device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910121943.2A CN109883606A (en) | 2019-02-19 | 2019-02-19 | A kind of screw-type pressure buffer device and pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910121943.2A CN109883606A (en) | 2019-02-19 | 2019-02-19 | A kind of screw-type pressure buffer device and pressure sensor |
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| Publication Number | Publication Date |
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| CN109883606A true CN109883606A (en) | 2019-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910121943.2A Pending CN109883606A (en) | 2019-02-19 | 2019-02-19 | A kind of screw-type pressure buffer device and pressure sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050998A (en) * | 2020-09-18 | 2020-12-08 | 辽宁工程技术大学 | Tunnel construction model test device |
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| CN205504326U (en) * | 2015-12-03 | 2016-08-24 | 武汉航空仪表有限责任公司 | Hydraulic cushion system - structure for instrument |
| CN206132300U (en) * | 2016-08-31 | 2017-04-26 | 重庆四联测控技术有限公司 | Buffer based on pressure transmitter |
| CN106932140A (en) * | 2017-04-25 | 2017-07-07 | 包金英 | A kind of pressure buffer device and pressure measuring device |
| CN206311263U (en) * | 2016-11-24 | 2017-07-07 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of pressure buffer installed in pressure sensor |
| US20180038757A1 (en) * | 2016-08-04 | 2018-02-08 | Smc Corporation | Pressure sensor and shock mitigating member |
| CN208443522U (en) * | 2018-07-17 | 2019-01-29 | 威海职业学院 | A kind of pressure sensor with impulse buffer unit |
| CN209589340U (en) * | 2019-02-19 | 2019-11-05 | 武汉中航传感技术有限责任公司 | A kind of screw-type pressure buffer device and pressure sensor |
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2019
- 2019-02-19 CN CN201910121943.2A patent/CN109883606A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201859036U (en) * | 2010-11-19 | 2011-06-08 | 新会康宇测控仪器仪表工程有限公司 | Damping structure of pressure transmitter |
| CN204202804U (en) * | 2014-09-12 | 2015-03-11 | 中法渤海地质服务有限公司 | A kind of impact damper for quartz crystal pressure flowmeter sensor |
| CN205504326U (en) * | 2015-12-03 | 2016-08-24 | 武汉航空仪表有限责任公司 | Hydraulic cushion system - structure for instrument |
| US20180038757A1 (en) * | 2016-08-04 | 2018-02-08 | Smc Corporation | Pressure sensor and shock mitigating member |
| CN206132300U (en) * | 2016-08-31 | 2017-04-26 | 重庆四联测控技术有限公司 | Buffer based on pressure transmitter |
| CN206311263U (en) * | 2016-11-24 | 2017-07-07 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of pressure buffer installed in pressure sensor |
| CN106932140A (en) * | 2017-04-25 | 2017-07-07 | 包金英 | A kind of pressure buffer device and pressure measuring device |
| CN208443522U (en) * | 2018-07-17 | 2019-01-29 | 威海职业学院 | A kind of pressure sensor with impulse buffer unit |
| CN209589340U (en) * | 2019-02-19 | 2019-11-05 | 武汉中航传感技术有限责任公司 | A kind of screw-type pressure buffer device and pressure sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050998A (en) * | 2020-09-18 | 2020-12-08 | 辽宁工程技术大学 | Tunnel construction model test device |
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