CN110285915A - A kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good - Google Patents
A kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good Download PDFInfo
- Publication number
- CN110285915A CN110285915A CN201910624395.5A CN201910624395A CN110285915A CN 110285915 A CN110285915 A CN 110285915A CN 201910624395 A CN201910624395 A CN 201910624395A CN 110285915 A CN110285915 A CN 110285915A
- Authority
- CN
- China
- Prior art keywords
- shell
- fixed
- fixedly connected
- egr
- bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
- G01L19/147—Details about the mounting of the sensor to support or covering means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/04—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of resistance-strain gauges
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of B/P EGR Back Pressure Transducer EGRs that vacuum pump detection stability is good, including shell, foil gauge and circuit assembly, it is electrically connected between the foil gauge and circuit assembly by the lead-out wire inside foil gauge, the top of the interior of shell is fixedly connected with negative pressure cabin, and interior of shell is provided with seal pipe on the downside of negative pressure cabin, sealing ring is fixedly connected between the seal pipe and outer casing inner wall, and the internal slide of seal pipe is connected with piston rod, the present invention relates to vacuum pump detection technique fields.The good B/P EGR Back Pressure Transducer EGR of the vacuum pump detection stability, structure is simple, production cost is low, and in the case where negative pressure, piston rod can be slided along negative pressure cabin, to apply active force to rubber pad with dynamic strain bar, to allow foil gauge, deformation occurs, passes through rotation adjustment turntable, the position of adjustable strain bar, it can be adjusted before using B/P EGR Back Pressure Transducer EGR, so as to improve the accuracy of detection.
Description
Technical field
The present invention relates to vacuum pump detection technique field, the specially a kind of negative pressure that vacuum pump detection stability is good sensing
Device.
Background technique
Vacuum pump, which refers to, to be obtained using machinery, physics, chemically or physically chemical method to being evacuated by pumping container
The device or equipment of vacuum.For popular, vacuum pump is to improve, generate and maintain true in a certain enclosure space with various methods
Empty device.Vacuum pump when in use, needs to carry out periodic detection to it, when detecting, needs to detect using B/P EGR Back Pressure Transducer EGR
The performance and accuracy of vacuum pump.
Chinese patent discloses a kind of negative pressure sensor used for mining (publication number: CN202471333U), includes the sensitive member of negative pressure
Part, digital zero setting and signal amplification circuit, PLC controller, output control circuit and display, negative pressure sensing element and number are adjusted
Zero and signal amplification circuit be connected, PLC controller respectively with digital zero setting and signal amplification circuit, output control circuit and display
Device is connected.
Chinese patent discloses a kind of pressure sensor (publication number: CN100417928C), including metallic rod, with root
The diaphragm deformed according to the pressure of application；And semiconductor substrate, wherein insulating layer is inserted in the first and second semiconductor layers
Between.Multiple foil gauges are formed in the presumptive area of the first semiconductor layer of semiconductor substrate, for turning the bending of diaphragm
Become electric signal.In the pressure sensor, the foil gauge has such pattern form, between the pattern form
It by channel insulation and is spaced apart, wherein each groove extends to insulating layer from the surface of the first semiconductor layer.
Structure is complicated for existing B/P EGR Back Pressure Transducer EGR, and production cost is higher, before using B/P EGR Back Pressure Transducer EGR, needs to it
It is calibrated, accuracy when vacuum pump is detected to improve, and vacuum pump can siphon away air, when examining to can change
Become the pressure inside verifying attachment, so needing B/P EGR Back Pressure Transducer EGR carrying out good fixation, prevents the negative pressure when examining from sensing
Device is fallen, and causes to influence inspection data.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good,
Solving existing B/P EGR Back Pressure Transducer EGR, structure is complicated, and production cost is higher, using before B/P EGR Back Pressure Transducer EGR, need to its into
Row calibration detects accuracy when vacuum pump to improve, and vacuum pump can siphon away air, when examining to can change
Pressure inside verifying attachment prevents the B/P EGR Back Pressure Transducer EGR when examining so needing B/P EGR Back Pressure Transducer EGR carrying out good fixation
It falls, leads to the problem of influencing inspection data.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: stability is used in a kind of detection of vacuum pump
Good B/P EGR Back Pressure Transducer EGR, including shell, foil gauge and circuit assembly, by foil gauge between the foil gauge and circuit assembly
The lead-out wire in portion is electrically connected, and the top of the interior of shell is fixedly connected with negative pressure cabin, and interior of shell is close to negative pressure cabin
Downside is provided with seal pipe, and sealing ring, and the internal slide of seal pipe are fixedly connected between the seal pipe and outer casing inner wall
It is connected with piston rod, the top of the piston rod is located at the inside of negative pressure cabin, and fits closely between piston rod and negative pressure cabin, institute
It states and is fixedly connected with partition between the edge of seal pipe upper surface and the top of shell, the side wall of the partition and shell is fixed
It is connected with inner ring, rubber pad is fixedly connected on the upside of the inner ring, the foil gauge is adhered to the upper surface of rubber pad, described
Circuit assembly is fixedly connected on the top of foil gauge upper housing；
Connecting rod is fixedly connected on the outside of the piston rod bottom end, the connecting rod upper surface is fixedly connected with strain
Bar, the strain bar run through sealing ring, and the top for straining bar is tightly attached to the downside of rubber pad, the piston rod and connecting rod
Lower surface is fixedly connected to sliding bar, and the internal slide of the sliding bar is connected with fixed link, the bottom end of the fixed link with
Shell is fixedly connected, and the outside of sliding bar and fixed link is arranged with connecting spring, the both ends of the connecting spring respectively with
Piston rod, connecting rod are fixedly connected with shell.
Preferably, the side insertion of the shell bottom end is connected with adjustment turntable, and interior of shell is close to adjustment turntable
Two sides are fixedly connected to sliding chute rod, and the inner rotation of the adjustment turntable is connected with slide bar, and the both ends sliding of the slide bar exists
The total force of the inside of sliding chute rod, the slide bar and sliding chute rod is greater than the force of sliding friction between slide bar and sliding chute rod.
Preferably, the intermediate position of the piston rod and connecting rod lower surface total length is fixedly connected with fixed screw rod,
The outer sheath of the fixed screw rod is equipped with external spiral bar, and the outer surface of fixed screw rod and the inner surface of external spiral bar are all provided with
It is equipped with screw thread, is connected between the fixed screw rod and external spiral bar, the outer surface of the external spiral bar is provided with ring gear,
One end of the adjustment turntable is connected with external spiral bar.
Preferably, the outer shell outer wall is hinged with outer cover by hinge close to the outside of adjustment turntable, and the outer cover is one
The component of kind of arcuate in shape, and outer cover is embedded in the side wall of shell far from one end of hinge, the outer cover and cage connection
Position is provided with sealing ring.
Preferably, the outer sheath of the shell is equipped with fixed ring, and the side of the fixed ring is fixedly connected with fixed plate, institute
The both ends for stating fixed plate, which are run through, is connected with fixed patch.
Preferably, the position that the shell is connect with fixed ring is uniformly provided with card slot, and the inner ring of the fixed ring is uniform
It is fixedly connected with fixture block, the interval of the fixture block and size are identical as card slot.
Preferably, the fixed ring includes the first connection ring and the second connection ring, and first connection ring and second connect
Ring rotation connection, and the first connection ring is fixed far from one end of rotary part by bolt with the second connection ring.
Preferably, the fixed patch includes knob and threaded rod, and the bottom end of the threaded rod is fixedly connected with connecting plate, institute
The lower surface for stating connecting plate is pasted with disposable rubberizing, and the knob is internally provided with internal screw thread, on the outside of the threaded rod
Top is provided with external screw thread, and threaded rod is engaged with internal screw thread by external screw thread and is attached with knob, and threaded rod is setting
There is the length at external screw thread position equal with the height of fixed plate.
(3) beneficial effect
The present invention provides a kind of B/P EGR Back Pressure Transducer EGRs that vacuum pump detection stability is good.Have it is following the utility model has the advantages that
(1), the vacuum pump detection is fixedly connected with the good B/P EGR Back Pressure Transducer EGR of stability by top inside the housing
Negative pressure cabin, and interior of shell is provided with seal pipe on the downside of negative pressure cabin, is fixedly connected between seal pipe and outer casing inner wall
Sealing ring, and the internal slide of seal pipe is connected with piston rod, the top of piston rod are located at the inside of negative pressure cabin, and piston rod with
It is fitted closely between negative pressure cabin, partition, piston rod bottom is fixedly connected between the edge of seal pipe upper surface and the top of shell
Connecting rod is fixedly connected on the outside of end, connecting rod upper surface is fixedly connected with strain bar, and strain bar runs through sealing ring, and strains
The top of bar is tightly attached to the downside of rubber pad, and present apparatus structure is simple, and production cost is low, in the case where negative pressure, piston rod meeting
It is slided along negative pressure cabin, to apply active force to rubber pad with dynamic strain bar, to allow foil gauge, deformation occurs, to play inspection
The purpose of survey.
(2), the good B/P EGR Back Pressure Transducer EGR of the vacuum pump detection stability is connected with by the side insertion in shell bottom end
Turntable is adjusted, the outer sheath of fixed screw rod is equipped with external spiral bar, the intermediate position of piston rod and connecting rod lower surface total length
It is fixedly connected with fixed screw rod, the outer sheath of fixed screw rod is equipped with external spiral bar, and outer shell outer wall is outer close to adjustment turntable
Side is hinged with outer cover by hinge, and the position of outer cover and cage connection is provided with sealing ring, the present apparatus by rotation adjustment turntable,
The position of adjustable strain bar, can be adjusted it, so as to improve detection before using B/P EGR Back Pressure Transducer EGR
Accuracy, and adjust turntable and can be slided along sliding chute rod, can keep and external spiral when B/P EGR Back Pressure Transducer EGR works
The distance of bar, avoid the occurrence of be in contact with it cause influence detect the problem of, and outer cover can be exchanged in negative pressure turn over disk with
The connecting portion of shell is sealed.
(3), the vacuum pump is detected with steady sensor by being uniformly provided with card slot at the position that shell is connect with fixed ring,
The inner ring of fixed ring is uniformly fixedly connected with fixture block, and the interval of fixture block and size are identical as card slot, and fixed ring includes the first company
Ring and the second connection ring, the first connection ring and the rotation connection of the second connection ring are connect, and the first connection ring and the second connection ring are separate
One end of rotary part is fixed by bolt, and fixed patch includes knob and threaded rod, and the bottom end of threaded rod is fixedly connected with
Connecting plate, the lower surface of connecting plate are pasted with disposable rubberizing, and the present apparatus can be adhered to detection by fixed ring and fixed patch
Stable connection inside device, and between fixed ring and shell, fixed patch is easy for installation, and is conveniently replaceable disposable patch
Working efficiency when detection can be improved in glue.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the partial enlarged view of part A in present invention knot Fig. 1；
Fig. 3 is the connection schematic diagram of fixed ring in the present invention；
Fig. 4 is the main view of fixed ring in the present invention；
Fig. 5 is the structural schematic diagram of fixed patch in the present invention.
In figure, 1, shell；2, foil gauge；3, circuit assembly；4, negative pressure cabin；5, seal pipe；6, sealing ring；7, piston rod；
8, partition；9, connecting rod；10, bar is strained；11, rubber pad；12, sliding bar；13, fixed link；14, connecting spring；15, fixed spiral shell
Spinner handle；16, external spiral bar；17, turntable is adjusted；18, sliding chute rod；19, slide bar；20, outer cover；21, fixed ring；22, fixed plate；
23, fixed patch；24, the first connection ring；25, the second connection ring；26, fixture block；27, knob；28, threaded rod；29, connecting plate；30,
Disposable rubberizing；31, internal screw thread；32, external screw thread；33, card slot；34, inner ring.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-5, the embodiment of the present invention provides a kind of technical solution: a kind of vacuum pump detection stability is good to be born
Pressure sensor, including shell 1, foil gauge 2 and circuit assembly 3, by inside foil gauge 2 between foil gauge 2 and circuit assembly 3
Lead-out wire is electrically connected, and foil gauge 2 is worked using half-bridge method, and workflow can be used referenced patents (publication number:
CN202471333U process or remaining process in the prior art in), the top inside shell 1 are fixedly connected with negative pressure cabin
4, and 1 inside of shell is provided with seal pipe 5 close to the downside of negative pressure cabin 4, the outer sheath of shell 1 is equipped with fixed ring 21, fixed ring
21 side is fixedly connected with fixed plate 22, and the both ends of fixed plate 22, which are run through, is connected with fixed patch 23, shell 1 and fixed ring 21
The position of connection is uniformly provided with card slot 33, and the inner ring of fixed ring 21 is uniformly fixedly connected with fixture block 26, the interval of fixture block 26 and
Size is identical as card slot 33, and fixed ring 21 includes the first connection ring 24 and the second connection ring 25, the first connection ring 24 and second
Connection ring 25 is rotatablely connected, and the first connection ring 24 and the second connection ring 25 are consolidated far from one end of rotary part by bolt
Fixed, fixed patch 23 includes knob 27 and threaded rod 28, and the bottom end of threaded rod 28 is fixedly connected with connecting plate 29, under connecting plate 29
Surface mount once property rubberizing 30, knob 27 are internally provided with internal screw thread 31, and the top in 28 outside of threaded rod is provided with outer
Screw thread 32, and threaded rod 28 is engaged with internal screw thread 31 by external screw thread 32 and is attached with knob 27, and threaded rod 28 is setting
There is the length at 32 position of external screw thread equal with the height of fixed plate 22, the present apparatus can be glued by fixed ring 21 and fixed patch 23
It is attached to inside detection device, and the stable connection between fixed ring 21 and shell 1, fixed patch 23 is easy for installation, and is convenient for
Disposable rubberizing 30 is replaced, working efficiency when detection can be improved, be fixedly connected between 1 inner wall of seal pipe 5 and shell close
Seal ring 6, and the internal slide of seal pipe 5 is connected with piston rod 7, and encapsulation process, piston are passed through between piston rod 7 and seal pipe 5
The top of bar 7 is located at the inside of negative pressure cabin 4, and fits closely between piston rod 7 and negative pressure cabin 4, the edge of 5 upper surface of seal pipe
It is fixedly connected with partition 8 between the top of shell 1, the side wall of partition 8 and shell 1 is fixedly connected to inner ring 34, inner ring 34
Upside be fixedly connected with rubber pad 11, foil gauge 2 is adhered to the upper surface of rubber pad 11, and circuit assembly 3, which is fixedly connected on, answers
Become the top of 2 upper housing 1 of piece, is fixedly connected with connecting rod 9 on the outside of 7 bottom end of piston rod, 9 upper surface of connecting rod is fixedly connected
There is strain bar 10, strain bar 10 runs through sealing ring 6, strains and passes through encapsulation process between bar 10 and sealing ring 6, and strains bar 10
Top is tightly attached to the downside of rubber pad 11, and present apparatus structure is simple, and production cost is low, and in the case where negative pressure, piston rod 7 can edge
Negative pressure cabin 4 slide, to apply active force to rubber pad 11 with dynamic strain bar 10, to allow foil gauge 2, deformation occurs, to rise
To the purpose of detection, the lower surface of piston rod 7 and connecting rod 9 is fixedly connected to sliding bar 12, the internal slide of sliding bar 12
It is connected with fixed link 13, the bottom end of fixed link 13 is fixedly connected with shell 1, and the outside of sliding bar 12 and fixed link 13 is arranged
There is connecting spring 14, the both ends of connecting spring 14 are fixedly connected with piston rod 7, connecting rod 9 and shell 1 respectively, 1 bottom end of shell
Side insertion is connected with adjustment turntable 17, and 1 inside of shell is fixedly connected to sliding chute rod 18 close to the two sides of adjustment turntable 17,
The inner rotation of adjustment turntable 17 is connected with slide bar 19, and the both ends sliding of slide bar 19 is in the inside of sliding chute rod 18, slide bar 19 and cunning
The total force of channel bar 18 is greater than the force of sliding friction between slide bar 19 and sliding chute rod 18, and piston rod 7 and 9 lower surface of connecting rod are total
The intermediate position of length is fixedly connected with fixed screw rod 15, and the outer sheath of fixed screw rod 15 is equipped with external spiral bar 16, and solid
The inner surface of the outer surface and external spiral bar 16 of determining screw rod 15 is provided with screw thread, fixed screw rod 15 and external spiral bar 16 it
Between be connected, the outer surface of external spiral bar 16 is provided with ring gear, and one end of adjustment turntable 17 is connected with external spiral bar 16,
1 outer wall of shell is hinged with outer cover 20 by hinge close to the outside of adjustment turntable 17, and outer cover 20 is a kind of component of arcuate in shape,
And outer cover 20 is embedded in the side wall of shell 1 far from one end of hinge, the position that outer cover 20 is connect with shell 1 is provided with sealing
Circle, for the present apparatus by rotation adjustment turntable 17, the position of adjustable strain bar 10 can be right before using B/P EGR Back Pressure Transducer EGR
It is adjusted, and so as to improve the accuracy of detection, and adjusts turntable 17 and can be slided along sliding chute rod 18, can
To keep at a distance from external spiral bar 16 when B/P EGR Back Pressure Transducer EGR works, avoiding the occurrence of to be in contact with it causes to influence asking for detection
Topic, and turn over disk 17 can be exchanged in negative pressure for outer cover 20 and the connecting portion of shell 1 is sealed.
In use, the outside of B/P EGR Back Pressure Transducer EGR is negative pressure, the pressure inside B/P EGR Back Pressure Transducer EGR is greater than external pressure, piston
Bar 7 is moved along negative pressure cabin 4, and is slided with dynamic strain bar 9 along sealing ring 7 by connecting rod 9, and can stretch connection bullet
Spring 14, strain bar 9 can apply active force to rubber pad 11 in sliding and answer so that deformation occurs for rubber pad 11 and foil gauge 2
Becoming piece 2 after deformation occurs, resistance can also generate variation, so as to measure, after pressure restores on the outside, connecting spring 14
It will pull piston rod 7 and connecting rod 9 restored to original position；When needing to calibrate sensor, outer cover 20 is opened, 17 edge of turntable will be adjusted
Sliding chute rod 18 inwardly push, until adjustment turntable 17 be engaged with external spiral bar 16, then rotation adjust turntable 17, adjustment turntable
Relative motion occurs between 17 drive external spiral bars 16 and fixed screw rod 15, and connecting rod 9 and strain bar 10 is driven to occur
Displacement changes the spacing between strain bar 10 and rubber pad 11, prevents rubber pad 11 and 2 continuous deformation of foil gauge；It needs to bear
When pressure sensor is fixed in detection device, fixed ring 21 is first installed to the outside of shell 1, during installation, by fixed ring 21
Fixture block 26 be embedded into card slot 33, then the connecting portion of first connection ring 24 and the second connection ring 25 makes in fixed ring 21
It is fixed with bolt, then adheres to disposable rubberizing 30 on connecting plate 29, threaded rod 28 is then run through into fixed plate 22, then
It is installed on threaded rod 28 by internal screw thread 31 with being engaged for external screw thread 32 using knob 27, will then be protected in disposable rubberizing 30
Bluff piece is removed, and secures the device to required position by fixed patch 23.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good, including shell (1), foil gauge (2) and circuit assembly
(3), it is electrically connected between the foil gauge (2) and circuit assembly (3) by foil gauge (2) internal lead-out wire, feature exists
In: the internal top of the shell (1) is fixedly connected with negative pressure cabin (4), and the internal downside close to negative pressure cabin (4) of shell (1)
It is provided with seal pipe (5), is fixedly connected with sealing ring (6) between the seal pipe (5) and shell (1) inner wall, and seal pipe (5)
Internal slide be connected with piston rod (7), the top of the piston rod (7) is located at the inside of negative pressure cabin (4), and piston rod (7)
It fits closely between negative pressure cabin (4), is fixedly connected between the edge and the top of shell (1) of seal pipe (5) upper surface
Have partition (8), the side wall of the partition (8) and shell (1) is fixedly connected to inner ring (34), and the upside of the inner ring (34) is solid
Surely it is connected with rubber pad (11), the foil gauge (2) is adhered to the upper surface of rubber pad (11), and the circuit assembly (3) is fixed
It is connected to the top of foil gauge (2) upper housing (1)；
It is fixedly connected with connecting rod (9) on the outside of piston rod (7) bottom end, connecting rod (9) upper surface is fixedly connected with
It strains bar (10), the strain bar (10) runs through sealing ring (6), and the top for straining bar (10) is tightly attached under rubber pad (11)
The lower surface of side, the piston rod (7) and connecting rod (9) is fixedly connected to sliding bar (12), the sliding bar (12) it is interior
Portion slidably connects fixed link (13), and the bottom end of the fixed link (13) is fixedly connected with shell (1), and sliding bar (12) and solid
The outside of fixed pole (13) is arranged with connecting spring (14), the both ends of the connecting spring (14) respectively with piston rod (7), connect
Bar (9) is fixedly connected with shell (1).
2. a kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good according to claim 1, it is characterised in that: described
The side insertion of shell (1) bottom end is connected with adjustment turntable (17), and the internal two sides close to adjustment turntable (17) of shell (1) are equal
It is fixedly connected with sliding chute rod (18), the inner rotation of adjustment turntable (17) is connected with slide bar (19), the slide bar (19)
Both ends sliding greater than slide bar (19) and is slided in the inside of sliding chute rod (18), the slide bar (19) and the total force of sliding chute rod (18)
Force of sliding friction between channel bar (18).
3. a kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good according to claim 2, it is characterised in that: described
The intermediate position of piston rod (7) and connecting rod (9) lower surface total length is fixedly connected with fixed screw rod (15), the fixed spiral shell
The outer sheath of spinner handle (15) is equipped with external spiral bar (16), and the interior table of the outer surface of fixed screw rod (15) and external spiral bar (16)
Face is provided with screw thread, is connected between the fixed screw rod (15) and external spiral bar (16), the external spiral bar (16)
Outer surface be provided with ring gear, one end of adjustment turntable (17) is connected with external spiral bar (16).
4. a kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good according to claim 3, it is characterised in that: described
Shell (1) outer wall is hinged with outer cover (20) close to the outside of adjustment turntable (17) by hinge, and the outer cover (20) is a kind of arch
The component of shape shape, and outer cover (20) is embedded in the side wall of shell (1) far from one end of hinge, the outer cover (20) and shell
(1) position connected is provided with sealing ring.
5. a kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good according to claim 4, it is characterised in that: described
The outer sheath of shell (1) is equipped with fixed ring (21), and the side of the fixed ring (21) is fixedly connected with fixed plate (22), described solid
The both ends of fixed board (22), which are run through, is connected with fixed patch (23).
6. a kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good according to claim 5, it is characterised in that: described
The position that shell (1) is connect with fixed ring (21) is uniformly provided with card slot (33), and the inner ring of the fixed ring (21) is uniformly fixed
It is connected with fixture block (26), the interval of the fixture block (26) and size are identical as card slot (33).
7. a kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good according to claim 6, it is characterised in that: described
Fixed ring (21) includes the first connection ring (24) and the second connection ring (25), first connection ring (24) and the second connection ring
(25) it is rotatablely connected, and the first connection ring (24) and the second connection ring (25) are consolidated far from one end of rotary part by bolt
It is fixed.
8. a kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good according to claim 5, it is characterised in that: described
Fixed patch (23) includes knob (27) and threaded rod (28), and the bottom end of the threaded rod (28) is fixedly connected with connecting plate (29),
The lower surface of the connecting plate (29) is pasted with disposable rubberizing (30), and the knob (27) is internally provided with internal screw thread
(31), the top on the outside of the threaded rod (28) is provided with external screw thread (32), and threaded rod (28) by external screw thread (32) with it is interior
Screw thread (31) occlusion is attached with knob (27), and threaded rod (28) is the length and fixation for being provided with external screw thread (32) position
The height of plate (22) is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910624395.5A CN110285915B (en) | 2019-07-11 | 2019-07-11 | Vacuum pump detects with good negative pressure sensor of stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910624395.5A CN110285915B (en) | 2019-07-11 | 2019-07-11 | Vacuum pump detects with good negative pressure sensor of stability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110285915A true CN110285915A (en) | 2019-09-27 |
| CN110285915B CN110285915B (en) | 2021-05-07 |
Family
ID=68021277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910624395.5A Active CN110285915B (en) | 2019-07-11 | 2019-07-11 | Vacuum pump detects with good negative pressure sensor of stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110285915B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115586071A (en) * | 2022-10-14 | 2023-01-10 | 中国建筑第五工程局有限公司 | Hollow slab bearing capacity detection equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2181687Y (en) * | 1993-10-29 | 1994-11-02 | 中国人民解放军南京军区南京总医院 | Pointer type manometer with critical pressure signal output unit |
| WO2001059420A1 (en) * | 2000-02-09 | 2001-08-16 | Schlumberger Limited | Methods and apparatus for measuring differential pressure with fiber optic sensor systems |
| CN2745052Y (en) * | 2004-10-11 | 2005-12-07 | 陈俊平 | Gas pressure loss detecting device |
| CN101021445A (en) * | 2007-03-23 | 2007-08-22 | 沈阳市传感技术研究所 | Pressure converting to force pressure sensor/transmitter |
| CN101881680A (en) * | 2010-06-03 | 2010-11-10 | 南京工业职业技术学院 | Multifunctional pressure detecting and measuring switch |
| CN103900756A (en) * | 2014-04-16 | 2014-07-02 | 山东微感光电子有限公司 | Fiber bragg grating pressure sensor capable of achieving positive and negative pressure monitoring and testing method |
-
2019
- 2019-07-11 CN CN201910624395.5A patent/CN110285915B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2181687Y (en) * | 1993-10-29 | 1994-11-02 | 中国人民解放军南京军区南京总医院 | Pointer type manometer with critical pressure signal output unit |
| WO2001059420A1 (en) * | 2000-02-09 | 2001-08-16 | Schlumberger Limited | Methods and apparatus for measuring differential pressure with fiber optic sensor systems |
| CN2745052Y (en) * | 2004-10-11 | 2005-12-07 | 陈俊平 | Gas pressure loss detecting device |
| CN101021445A (en) * | 2007-03-23 | 2007-08-22 | 沈阳市传感技术研究所 | Pressure converting to force pressure sensor/transmitter |
| CN101881680A (en) * | 2010-06-03 | 2010-11-10 | 南京工业职业技术学院 | Multifunctional pressure detecting and measuring switch |
| CN103900756A (en) * | 2014-04-16 | 2014-07-02 | 山东微感光电子有限公司 | Fiber bragg grating pressure sensor capable of achieving positive and negative pressure monitoring and testing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115586071A (en) * | 2022-10-14 | 2023-01-10 | 中国建筑第五工程局有限公司 | Hollow slab bearing capacity detection equipment |
| CN115586071B (en) * | 2022-10-14 | 2023-12-05 | 中国建筑第五工程局有限公司 | Hollow slab bearing capacity detection equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110285915B (en) | 2021-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110318198A1 (en) | Fluid Flow Rate Compensation System Using an Integrated Conductivity Sensor to Monitor Tubing Changes | |
| CN104089741B (en) | Pressure distribution sensor calibration measuring apparatus | |
| CN110374857A (en) | A kind of gentle pressure monitoring device of membrane compresses oil pressure and method | |
| CN105865392A (en) | Measuring device for measuring thickness variation of soft-packaged power battery | |
| CN110285915A (en) | A kind of B/P EGR Back Pressure Transducer EGR that vacuum pump detection stability is good | |
| CN207636232U (en) | A kind of strain-type differential pressure pickup | |
| WO2020098633A1 (en) | Capacitive liquid level measurement device and method | |
| CN205918703U (en) | External displacement sensor is used to pneumatic cylinder dynamic testing | |
| CN104075829B (en) | A kind of new type vibration wire concrete pressure cell | |
| CN208653387U (en) | Flatness reads displayable detection ruler | |
| RU2656136C1 (en) | Sensor for measurement of ground pressure | |
| CN207066404U (en) | A kind of strain transducer based on image recognition | |
| CN2869801Y (en) | Liquid-level measuring instrument | |
| CN211927225U (en) | Instrument and meter production is with resistant nature detection device that falls | |
| CN210719358U (en) | Detection terminal for measuring material deposition | |
| CN208282908U (en) | A kind of column type weighing sensor | |
| CN207981097U (en) | Accurate device for measuring force in a kind of autoclave | |
| CN207231584U (en) | A kind of liquid level sensor for carrying fixing device | |
| CN206291984U (en) | Force cell | |
| CN211855691U (en) | Pressure transmitter measuring device | |
| CN106091915B (en) | The device and microspur detection method that microspur detecting sensor, perception microspur change | |
| CN208239009U (en) | A kind of high precision diaphragm electronic pressure gage | |
| CN205593646U (en) | Different sound detecting system of fan | |
| CN205209590U (en) | Adopt liquid level detection device of pressure detection technique | |
| CN210024282U (en) | Instrument housing welding fixing device for air supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |