CN2078873U - Means for suppressing the interference of wind pressure - Google Patents
Means for suppressing the interference of wind pressure Download PDFInfo
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- CN2078873U CN2078873U CN 90217279 CN90217279U CN2078873U CN 2078873 U CN2078873 U CN 2078873U CN 90217279 CN90217279 CN 90217279 CN 90217279 U CN90217279 U CN 90217279U CN 2078873 U CN2078873 U CN 2078873U
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Abstract
The utility model discloses a device for suppressing the interference of wind pressure, which is used in a pressure measuring and regulating system. The utility model is composed of a signal channel of standard atmospheric pressure and a pressure measuring channel for gas capacity. An outer hollow ball (1), inner hollow balls (2), (3), pressure guide pipes (4), (5) in the two channels form a hollow spherical atmospheric pressure sampler with double layers. The utility model can be used for suppressing the interference influence of wind pressure. Thus, the result of pressure measurement is true and accurate, and the utility model has the function of suppressing the fluctuation of output signals resulting from various reasons. The utility model is particularly suitable for the pressure measuring and regulating systems of micro-pressure, low pressure, etc., and is also suitable for other measuring systems which uses the atmospheric pressure as a reference pressure, a measuring system of the atmospheric pressure, etc.
Description
The utility model relates to a kind of wind-pressing interferencing eliminating device that is used for pressure-measuring system.
Industrial used force value mostly is gauge pressure greatly, negative pressure (vacuum tightness).In gauge pressure and negative pressure measuring process all with local atmospheric pressure as datum pressure.When for example measuring minute-pressure with differential pressure transmitter, two differential pressure chambers of its measuring diaphragm both sides, one connects by measuring pressure, another directly logical atmosphere.Such measuring system measurement result when calm is normal, but the blast that forms when blow air-flow or artificial air-flow just makes and added the blast interfering components in the measurement result when being superimposed upon on the atmospheric pressure feeding transmitter.For example a certain tested force value is 40Pa (Pascal), and when running into the blast interference of 50Pa, as seen measurement result demonstration-10Pa causes the measuring error of 50Pa, and is malleation originally, but is shown as negative pressure.The big more measuring error of wind-force is big more, and measurement range is more little, and the measurement result distortion is serious more, and blast wandering also makes the measurement output signal fluctuate thereupon.Above-mentioned blast disturbs the measuring error that causes, it is that production run is undesired that distortion and fluctuation often are mistaken as, and influences product quality and output, causes the accident.Blast wandering also makes measurement instrument often be operated in and measures in the transient process and is difficult to enter steady state (SS), causes instrument shortening in serviceable life, reliability decrease.
Above-mentioned blast disturbs and influence is ubiquitous serious problems in the widely used pressure survey, but prior art disturbs the understanding that enters the measuring system approach clear and definite inadequately to existence and this blast of this problem, or think that the blast interference can't overcome, reality is not seen outstanding effect inhibition method or device yet.What see usually is only to use the damper damping for suppressing in fact agnogenic output signal fluctuation, and fluctuation has certain inhibiting effect though this method is to output signal, disturbs the measuring error and the distortion that cause inoperative to the above-mentioned blast of mentioning.
The purpose of this utility model provides a kind of blast disturbing effect of can getting rid of makes pressure measurements true, accurate, and can suppress the wind-pressing interferencing eliminating device of measuring system output signal fluctuation effectively.
Wind-pressing interferencing eliminating device of the present utility model comprises reference atmospheric pressure signalling channel and air-capacitor pressure survey passage two parts, as shown in Figure 1, described reference atmospheric pressure signalling channel is made up of outer space bulbus cordis (1), interior hollow ball (2), connecting pipe (4), filtrator (6), connecting pipe (7), adjustable vapour lock (8), adjusting knob (20), permanent vapour lock (9), connecting pipe (10), air-capacitor (11) and the connecting pipe (12) in parallel with adjustable vapour lock (8).
Described air-capacitor pressure survey passage is by outer space bulbus cordis (1), interior hollow ball (3), connecting pipe (5), filtrator (13), connecting pipe (14), adjustable vapour lock (15), adjusting knob (21), permanent vapour lock (16), the connecting pipe (17) in parallel with adjustable vapour lock (15), and capsule pressure gauge (18) and air-capacitor (11) are formed.
Outer space bulbus cordis (1) in above-mentioned two passages, interior hollow ball (2), interior hollow ball (3), connecting pipe (4) and connecting pipe (5) constitute a double-layer hollow ball-type atmospheric pressure sampling thief jointly, and wherein each hollow ball surface all is uniform-distribution with some onesize air holes.This sampling thief is arranged on below the air-capacitor (11), exposes in the atmosphere.
When blowing airflow passes double-layer hollow ball-type atmospheric pressure sampling thief, can think half of outer space bulbus cordis (1) surface area for the windward side, second half is a lee face.Again because spherome surface is uniform-distribution with some onesize air holes, and the air hole total area only accounts for the long-pending few part of spherome surface, enter just flow through few part of outer space bulbus cordis (1) air-flow of the inner air-flow of outer space bulbus cordis (1) by the windward side air hole, this part air-flow can release through the air hole of the same total area of lee face again, thus guaranteed the inner atmospheric pressure of outer space bulbus cordis (1) substantially not wind-engaging press dry and disturb influence.Same principle, interior hollow (2) pressure inside will be more stable, such atmospheric pressure signal is passed through filter (6), adjustable vapour lock (8) again to be sent in the air-capacitor (11) and all presses, send into transmitter direct open to atmosphere differential pressure chamber usually through connecting pipe (12) then, what this moment, transmitter obtained is the reference atmospheric pressure signal that does not contain the blast interfering components, so realized making measurement result truly, purpose accurately.
On the other hand, when being changed by measuring pressure, the displacement of transmitter measuring diaphragm changes the middle pressure of air-capacitor (11) thereupon, the pressure differential of pressure and original reference atmospheric pressure in the air-capacitor after changing (11), this pressure differential forms that air-capacitor (11) is filled, bleed flow, and this air-flow reference atmospheric pressure signalling channel of also flowing through enters atmosphere.The resistance of adjusting adjustable vapour lock (8) can change the filling of air-capacitor (11), deflation time constant, has controlled the measurement transient process indirectly.When pressure returns to reference atmospheric pressure again in the air-capacitor (11), also be transmitter measuring diaphragm displacement when putting in place, ends of filling, exit, the transmitter output numerical value after by the measuring pressure variation, the measuring process end also enters stable output state.This control action time, the transmitter output signal applies to varitrol can make the adjusting action in time in short-term.This control action time is when long, under tested pressure oscillation fluctuation situation, because pressure changes acting force to the transmitter measuring diaphragm with opposite by the force direction of measuring pressure in the air-capacitor (11) thereupon, thereby acquisition suppresses the effect of output signal fluctuation, this effect is of value to the working stability of measurement, regulating system, and can make measuring system avoid often being operated in the measurement transient process, be of value to instrument and prolong and the raising functional reliability serviceable life.
The capsule pressure gauge (18) that is provided with in the air-capacitor (11) is used for showing air-capacitor (11) pressure changing, so that understand and adjust the duty of reference atmospheric pressure signalling channel.But the surveying work of capsule pressure gauge (18) also needs the reference atmospheric pressure signal of oneself, thereby is provided with air-capacitor pressure survey passage.The reference atmospheric pressure signal that this passage provides feeds in the bellows of capsule pressure gauge (18), and pressure in the air-capacitor (11) is experienced in the bellows outside.The principle of work of this passage and reference atmospheric pressure signalling channel are basic identical, do not establish air-capacitor for no other reason than that need not to have the function of air-capacitor.The adjustment of in use adjustable vapour lock (15) resistance shows in time and nonoscillatory degree of being with capsule pressure gauge (18).
Below in conjunction with accompanying drawing the utility model is described in detail.
Fig. 1 is a wind-pressing interferencing eliminating device structural representation of the present utility model, being labeled as among Fig. 1:
Outer space bulbus cordis (1), interior hollow ball (2), interior hollow ball (3), connecting pipe (4), connecting pipe (5), filtrator (6), connecting pipe (7), adjustable vapour lock (8), permanent vapour lock (9), connecting pipe (10), air-capacitor (11), connecting pipe (12), filtrator (13), connecting pipe (14), adjustable vapour lock (15), permanent vapour lock (16), connecting pipe (17), capsule pressure gauge (18), visor (19), adjusting knob (20) adjusting knob (21), ring-likely go out along (22).
As shown in Figure 1, constitute a double-layer hollow ball-type atmospheric pressure sampling thief jointly by outer space bulbus cordis (1), interior hollow ball (2), interior hollow ball (3), connecting pipe (4) and connecting pipe (5).Three hollow balls are the thin-walled hollow ball that the surface is uniform-distribution with some onesize air holes, and they can be made with metal or plastic or other material.By changing the ratio of each hollow ball surface area surperficial equally distributed air hole total area in three hollow balls with it, can satisfy different actual demands, this suitable area ratio can reduce to the blast interfering components below the per mille.The structures shape of this sampling thief, regardless of wind direction, it is identical to get rid of the blast interference effect.Three hollow balls in this atmospheric pressure sampling thief also can replace with the corresponding container that the surface distributed of other shape some air holes, constitute the double-deck atmospheric pressure sampling thief of other shape, but wind direction are not simultaneously, and result of use is with variant.
Interior hollow ball (2) and interior hollow ball (3) are onesize, and its diameter is less than 1/2nd of outer space bulbus cordis (1) diameter.Two interior hollow balls can be arranged on any position that outer space bulbus cordis (1) inside is symmetrical in outer space bulbus cordis (1) centre of sphere, are preferably disposed on upper-lower position as shown in Figure 1.Consider it is not have pressure differential between capsule pressure gauge (18) the reference atmospheric pressure signal separately that makes as far as possible in measuring system and the air-capacitor (11) like this.
As shown in Figure 1, connecting pipe (5) is to be enclosed within the connecting pipe (4), and passes interior hollow ball (2) and be communicated with the interior hollow ball (3) of below.Also can use the connecting pipe of two same diameters to pass the ball wall of outer space bulbus cordis (1) side by side, connecting pipe (4) is connect interior hollow ball (2), connecting pipe (5) is walked around interior hollow ball (2) and is communicated with the interior hollow ball (3) of below.
As shown in Figure 1, permanent vapour lock (9) is in parallel with adjustable vapour lock (8), and the effect of permanent vapour lock (9) is to close when dead when adjustable vapour lock (8) mistake, still can provide the reference atmospheric pressure signal for measuring system.Permanent vapour lock (16) is in parallel with adjustable vapour lock (15), and the effect of permanent vapour lock (16) is identical with permanent vapour lock (9).Permanent vapour lock (9) and permanent vapour lock (16) can replace with adjustable vapour lock, after resistance is determined, no longer adjust in the use.Filtrator (6) and filtrator (13) are used to prevent the gas circuit obstruction.
As shown in Figure 1, air-capacitor (11) is the garden cylindricality air-capacitor that both ends of the surface are sphere, and this air-capacitor also can be other shape.Air-capacitor (11) lower end has annular to go out along (22), is arranged on the following double-layer hollow ball-type atmospheric pressure sampling thief of air-capacitor (11) in case rainwater is flowed through.Because multi-purpose needs, this sampling thief also can be arranged on other position with respect to air-capacitor (11).
Filtrator (6) reaches the connecting pipe that is connected with these parts with (13), adjustable vapour lock (8) and (15), permanent vapour lock (9) and (16), capsule pressure gauge (18) and all is arranged on air-capacitor (11) inside.Adjusting knob (20) and (21) are arranged on outside air-capacitor (11) wall, so that adjust.Outside the membrane removal tensimeter (18), the above-mentioned inner parts of air-capacitor (11) that are arranged on also can be arranged on outside the air-capacitor (11).
Capsule pressure gauge (18) is arranged on air-capacitor (11) internal upper part windowing place, and visor (19) is installed on this window, sees through the middle pressure of air-capacitor (11) that visor (19) can see that capsule pressure gauge (18) shows.Capsule pressure gauge (18) can replace with the tensimeter of other type.
Wind-pressing interferencing eliminating device of the present utility model has following major advantage and good effect:
1, this device particular structure and unique its function of using method are that the blast ELIMINATION OF ITS INTERFERENCE is fallen, make the work of measuring system avoid its influence, rather than the common interfering components that will enter in the output signal is rejected again, thereby be a kind of device that tackles the problem at its root, can obtain unique result of use.
When 2, using damper, increased a link in the measuring system, measuring error also can increase, and this device is not participated in conversion of signals, transmission directly, and measuring error can not increase, and can suppress the output signal fluctuation that multiple reason causes effectively.
3, this device does not need to consume any energy, and is simple in structure, the reliability height, and working service is convenient.
4, this device wide application is specially adapted to minute-pressure, low pressure measurement, regulating system.The use of this device can make long-term ubiquitous blast disturb, and the present situation that has a strong impact on measurement result improves, thus positive effects such as acquisition improves product quality and yield, energy savings, minimizing pollution.The atmospheric pressure measurement system that this device also can be used for observatory, stand and other are the measuring system of datum pressure with the atmospheric pressure.
Further specify purposes of the present utility model and effect with reference to accompanying drawing 2.Fig. 2 is two use-case synoptic diagram of the utility model wind-pressing interferencing eliminating device.
As shown in Figure 2, the left side one example is that this device is used for pressure-measuring system.Wind-pressing interferencing eliminating device (23) is connected to the negative differential pressure could chamber of differential pressure transmitter (24) by connecting pipe (12), and positive differential pressure chamber connects by measuring pressure by connecting pipe (25), and this can be a malleation by measuring pressure, also can be negative pressure.When being the boiler furnace negative pressure, can making measurement result true, accurately because of avoiding the blast disturbing effect, thereby obtain to improve the positive effect of the thermal efficiency, fuel savings, minimizing atmospheric pollution by measuring pressure.
As shown in Figure 2, the right one example is that this device is used for fluid column atmospheric pressure meter.Wind-pressing interferencing eliminating device (23) is connected to the above space of the interior liquid level of liquid reservoir (26) by connecting pipe (12), and the reference atmospheric pressure of getting rid of after blast disturbs acts on this liquid level.The interior fluid column of glass tube (27) shows atmospheric pressure value, and the interior fluid column of glass tube (27) is a vacuum with top.Result of use is a wind-force size no matter, all can obtain not contain the measurement result of blast interfering components, and avoid indicating value to fluctuate with blast.
Claims (9)
1, a kind of wind-pressing interferencing eliminating device that is used for pressure survey, regulating system is characterized in that it comprises reference atmospheric pressure signalling channel and air-capacitor pressure survey passage two parts:
The reference atmospheric pressure signalling channel is made up of outer space bulbus cordis (1), interior hollow ball (2), connecting pipe (4), filtrator (6), connecting pipe (7), adjustable vapour lock (8), adjusting knob (20), permanent vapour lock (9), connecting pipe (10), air-capacitor (11) and the connecting pipe (12) in parallel with adjustable vapour lock (8)
Air-capacitor pressure survey passage is made up of outer space bulbus cordis (1), interior hollow ball (3), connecting pipe (5), filtrator (13), connecting pipe (14), adjustable vapour lock (15), adjusting knob (21), permanent vapour lock (16), connecting pipe (17), capsule pressure gauge (18) and the air-capacitor (11) in parallel with adjustable vapour lock (15)
Outer space bulbus cordis (1) in above-mentioned two passages, interior hollow ball (2), interior hollow ball (3), connecting pipe (4) and connecting pipe (5) constitute a double-layer hollow ball-type atmospheric pressure sampling thief jointly, and wherein each hollow ball is the thin-walled hollow ball that the surface is uniform-distribution with some onesize air holes.
2, device according to claim 1 is characterized in that described double-layer hollow ball-type atmospheric pressure sampling thief is arranged on below the air-capacitor (11), also can be arranged on other position with respect to air-capacitor (11).
3, device according to claim 1, it is characterized in that described interior hollow ball (2) and interior hollow ball (3) can be arranged on any position that outer space bulbus cordis (1) inside is symmetrical in outer space bulbus cordis (1) centre of sphere, are preferably disposed on the upper-lower position in the outer space bulbus cordis (1).
4, device according to claim 1, it is characterized in that described connecting pipe (5) is to be enclosed within the connecting pipe (4), and pass interior hollow ball (2) and be communicated with the interior hollow ball (3) of below, also can use the connecting pipe of same diameter to pass the ball wall of outer space bulbus cordis (1) side by side, connecting pipe (4) is connect interior hollow ball (2), and connecting pipe (5) is walked around interior hollow ball (2) and is communicated with the interior hollow ball (3) of below.
5, device according to claim 1, it is characterized in that three hollow balls in the described double-layer hollow ball-type atmospheric pressure sampling thief, also can the corresponding container replacement of some air holes with the surface distributed of other shape, constitute the double-deck atmospheric pressure sampling thief of other shape.
6, device according to claim 1 is characterized in that described permanent vapour lock (9) is in parallel with adjustable vapour lock (8), and permanent vapour lock (16) is in parallel with adjustable vapour lock (15), and permanent vapour lock (9) and permanent vapour lock (16) also can replace with adjustable vapour lock.
7, device according to claim 1 is characterized in that described air-capacitor (11) is that both ends of the surface are that sphere, lower end have the garden cylindricality air-capacitor that annular goes out edge (22), and this air-capacitor also can be other shape.
8, device according to claim 1, it is characterized in that described filtrator (6) and (13), adjustable vapour lock (8) and (15), permanent vapour lock (9) and (16), capsule pressure gauge (18) and the connecting pipe that is connected with these parts all are arranged on air-capacitor (11) inside, capsule pressure gauge (18) is arranged on this air-capacitor internal upper part and has the window place, visor (19) is installed on this window, adjusting knob (20) and (21) are arranged on outside air-capacitor (11) wall, except that bellows tensimeter (18), the above-mentioned inner parts of air-capacitor (11) that are arranged on also can be arranged on outside the air-capacitor (11).
9, device according to claim 1 is characterized in that described capsule pressure gauge (18) also can replace with the tensimeter of other type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90217279 CN2078873U (en) | 1990-08-02 | 1990-08-02 | Means for suppressing the interference of wind pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90217279 CN2078873U (en) | 1990-08-02 | 1990-08-02 | Means for suppressing the interference of wind pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2078873U true CN2078873U (en) | 1991-06-12 |
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ID=4896298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90217279 Withdrawn CN2078873U (en) | 1990-08-02 | 1990-08-02 | Means for suppressing the interference of wind pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2078873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527070A (en) * | 2015-12-02 | 2016-04-27 | 中国航空工业集团公司沈阳空气动力研究所 | Device for stabilizing atmospheric pressure for wind tunnel gauge pressure sensor and method for stabilizing air pressure |
-
1990
- 1990-08-02 CN CN 90217279 patent/CN2078873U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105527070A (en) * | 2015-12-02 | 2016-04-27 | 中国航空工业集团公司沈阳空气动力研究所 | Device for stabilizing atmospheric pressure for wind tunnel gauge pressure sensor and method for stabilizing air pressure |
| CN105527070B (en) * | 2015-12-02 | 2018-01-16 | 中国航空工业集团公司沈阳空气动力研究所 | The device and stable gas pressure means of the stable atmospheric pressure of wind-tunnel gauge pressure transducer |
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| CF01 | Termination of patent right due to non-payment of annual fee |