CN210487156U - Compensation type anti-blocking pressure measuring device - Google Patents
Compensation type anti-blocking pressure measuring device Download PDFInfo
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- CN210487156U CN210487156U CN201921777123.0U CN201921777123U CN210487156U CN 210487156 U CN210487156 U CN 210487156U CN 201921777123 U CN201921777123 U CN 201921777123U CN 210487156 U CN210487156 U CN 210487156U
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- 238000009530 blood pressure measurement Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 2
- 210000003437 trachea Anatomy 0.000 description 14
- 238000010586 diagram Methods 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a compensation type anti-blocking pressure measuring device, which is used for measuring the pressure of an equipment container and comprises an air pipe, a pressure reducing valve, a rotor flow meter, a pressure compensator and a pressure transmitter, wherein the pressure reducing valve, the rotor flow meter and the pressure compensator are connected in series and communicated together by the air pipe, the pressure reducing valve is close to the air inlet of the air pipe, and the pressure compensator is close to the air outlet of the air pipe; the pressure transmitter is communicated with the pressure compensator and is used for measuring the pressure of the pressure compensator; and the air outlet of the air pipe is communicated with the equipment container. The device has the characteristics of accurate measurement, simple structure, safety, reliability, easy maintenance and difficult blockage.
Description
Technical Field
The utility model relates to a pressure measurement technical field, in particular to stifled pressure measurement device is prevented to compensation formula.
Background
The existing pressure measuring device is shown in fig. 1 and mainly comprises a connecting flange 3, a pressure guiding pipe 2 and a pressure transmitter 1. The pressure transmitter 1 is connected with the equipment container 4 through the pressure leading pipe 2 and the connecting flange 3, the pressure leading pipe 2 leads out the pressure in the equipment container 4, and the pressure in the pressure leading pipe 2 is measured through the pressure transmitter 1 to obtain the pressure in the equipment container 4. However, the pressure measuring device has the following problems in use:
1. the pressure transmitter 1 measures the pressure in the pressure guiding pipe 2, and the pressure in the pressure guiding pipe 2 is deviated from the pressure value in the equipment container 4, so that the measurement is inaccurate.
2. The pressure guiding pipe 2 is directly connected and communicated with the equipment container 4, and the medium in the equipment container 4 contains impurities, which easily causes the blockage and crystallization of the pipe orifice of the pressure guiding pipe 2.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a stifled pressure measurement device is prevented to compensation formula, this pressure device can solve among the prior art measure inaccurate, easily stifled, maintain inconvenient problem.
In order to solve the problems, the utility model provides a compensation type anti-blocking pressure measuring device which is used for measuring the pressure of a device container and comprises an air pipe, a pressure reducing valve, a rotor flow meter, a pressure compensator and a pressure transmitter,
the pressure reducing valve, the rotor flowmeter and the pressure compensator are sequentially communicated in series through the air pipe, wherein the pressure reducing valve is close to an air inlet of the air pipe, and the pressure compensator is close to an air outlet of the air pipe;
the pressure transmitter is communicated with the pressure compensator and is used for measuring the pressure of the pressure compensator;
and the air outlet of the air pipe is communicated with the equipment container.
Furthermore, the compensation type anti-blocking pressure measuring device further comprises a check valve, and the check valve is installed on the air pipe and is respectively communicated with the pressure reducing valve and the rotor flow meter in series through the air pipe.
Further, the trachea includes first trachea and second trachea, be equipped with pressure compensator on the first trachea, be equipped with on the second trachea rotor flowmeter with the relief pressure valve, first trachea with can dismantle the connection between the second trachea, pressure compensator with can dismantle the connection between the pressure transmitter.
Furthermore, a switch valve or a connecting valve is arranged between the first air pipe and the second air pipe, and a switch valve or a connecting valve is arranged between the pressure compensator and the pressure transmitter.
Further, the air pipe and the equipment container are detachably and fixedly connected.
Further, the air pipe is connected with the equipment container through a connecting flange.
Further, the gas outlet of the gas pipe extends into the inner cavity of the equipment container, and the gas outlet extending into the gas pipe extends towards the bottom of the equipment container to form an included angle of 8-10 degrees with the horizontal plane.
Further, the rotameter is provided with a support base.
Further, the formula is satisfied:
wherein S is1Is the cross-sectional area, S, of gas flow in the pressure compensator2And epsilon is the pipe resistance coefficient between the pressure compensator and the air outlet of the air pipe.
Further, the pressure compensator and the air pipe air outlet are on the same horizontal plane or the error of the pressure compensator and the air pipe air outlet in the horizontal height is in a set range.
To sum up, the compensation type anti-blocking pressure measuring device of the utility model is used for compensating the pressure lost in the circulation process of the gas and eliminating the measurement error by arranging the pressure compensator and directly measuring the pressure of the pressure compensator; the medium in the equipment container does not need to be led out for measurement, so the problems of blockage and crystallization can not occur; meanwhile, the air pipe and the equipment container are detachably and fixedly connected, the first air pipe and the second air pipe are detachably connected, and the pressure compensator and the pressure transmitter are detachably connected, so that the device is convenient to maintain and replace. Therefore, the device has the characteristics of accurate measurement, simple structure, safety, reliability, easy maintenance and difficult blockage.
Drawings
FIG. 1 is a block diagram of a prior art pressure measurement device;
FIG. 2 is a structural diagram of the compensation type anti-blocking pressure measuring device in the embodiment of the present invention;
FIG. 3 is a connection diagram of the compensated anti-clogging pressure measuring device shown in FIG. 2 with an equipment container;
the system comprises a pressure transmitter 1, a pressure leading pipe 2, a connecting flange 3, an equipment container 4, a pressure reducing valve 201, an air inlet 202, a check valve 203, a rotor flow meter 204, a base 205, a first switch valve 206, a pressure transmitter 207, a second switch valve 208, a connecting flange 209, an air pipe 210, a pressure compensator 211 and an equipment container 212.
Detailed Description
The following describes the compensation type anti-blocking pressure measuring device according to the present invention in further detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Fig. 2 is a structural diagram of the compensation type anti-blocking pressure measuring device of the present embodiment. Referring to fig. 3, the apparatus is used for measuring the pressure of an equipment container 212, and comprises a gas pipe 210, a pressure reducing valve 201, a rotameter 204, a pressure compensator 211 and a pressure transmitter 207,
the gas pipe 210 sequentially connects the pressure reducing valve 201, the rotameter 204 and the pressure compensator 211 in series, wherein the pressure reducing valve 201 is close to the gas inlet 202 of the gas pipe 210, and the pressure compensator 211 is close to the gas outlet of the gas pipe 210;
the pressure transmitter 207 is communicated with the pressure compensator 211 and is used for measuring the pressure of the pressure compensator 211;
the air outlet of the air tube 210 communicates with the equipment container 212.
It can be seen that the compensation type anti-blocking pressure measuring device further comprises a check valve 203, wherein the check valve 203 is installed on the air pipe 210 and is respectively connected in series with the pressure reducing valve 201 and the rotameter 204 through the air pipe 210, so as to prevent gas backflow caused by excessive pressure in the equipment container 212.
In addition, rotameter 204 is provided with a supporting base 205 for stabilizing rotameter 204.
Preferably, rotameter 204 with can dismantle the connection between the pressure compensator 211, trachea 210 includes first trachea and second trachea, be equipped with pressure compensator 211 on the first trachea, be equipped with on the second trachea rotameter 204 with relief pressure valve 201, first trachea with can dismantle the connection between the second trachea, the formula of compensating of this embodiment prevents stifled pressure measurement device and adopts first ooff valve 206 to dismantle the connection, can also adopt the connecting valve to connect certainly, the utility model discloses do not prescribe a limit to specific connected mode. Similarly, the pressure compensator 211 is detachably connected to the pressure transmitter 207, and in this embodiment, a second on-off valve 208 is used for connection. Of course, the detachable connection can also be connected using a connecting valve.
Preferably, the air tube 210 is detachably and fixedly connected with the equipment container 212. In this embodiment, the connection is performed by using a connection flange 209.
As can be seen in fig. 3, the outlet of the gas tube 210 extends into the interior of the device container 212. Preferably, the air outlet that the air pipe 210 stretches into extends to the bottom of equipment container 212 and personally submits 8 ~ 10 contained angles with the horizontal plane to when preventing that the interior cross-section of equipment container 212 from not completely covering the air outlet of air pipe 210, the medium in the equipment container 212 refluxes in air pipe 210, influences the measurement.
It should be noted that, in fig. 3, the plane a-a is the position of the pressure to be measured in the pressure transmitter 207, and the plane B-B is the plane where the air outlet of the air pipe 210 is located.
In order for the pressure at A-A to be equal to the pressure at B-B, i.e., the pressure at A-A as measured by pressure transmitter 207 is the pressure at the bottom of equipment vessel 212, the following equation must be satisfied:
wherein S is1Is a cross-sectional area, S, of gas flow in the pressure compensator 2112The sectional area of the air outlet of the air pipe 210 is epsilon, and the pipe resistance coefficient from A-A to B-B of the air pipe 210 in the pressure compensator 211 is epsilon.
The above formula can be obtained by the following method:
setting the pressure at A-A and B-B as P1、P2(ii) a The gas flow rates are respectively V1、V2(ii) a Height is respectively H1、H2(ii) a The blown gas density is rho; the pipe resistance coefficient between the A-A and B-B sections is epsilon; the resistance consumption energy is W, and the gravity acceleration is g.
The Bernoulli equation satisfied between the A-A and B-B sections is:
wherein,
so that formula (1) is as
Let the heights of A-A, B-B be substantially equal, i.e. H1≈H2Therefore, formula (2) is represented by
As shown in formula (3), P is added1＝P2Only need to satisfy
Because the cross section between A-A and B-B is a series pipeline, the flow rate is equal, so that the flow rate is obtained
V1S1＝V2S2(5)
By substituting formula (5) into formula (4)
So that the section S at A-A, B-B1、S2Satisfying the formula (6), P can be obtained1＝P2And the pressure at the position A-A is equal to the pressure at the position B-B, so that the measurement is not influenced by the gas flow, and the pressure compensation measurement is realized.
According to the above reasoning, the pressure compensator 211 and the air outlet of the air pipe 210 are on the same horizontal plane or the error of the horizontal height between the pressure compensator 211 and the air outlet of the air pipe 210 is within the set range, so that the heights at the positions A-A and B-B are substantially equal, i.e. H1≈H2。
Therefore, the compensation type anti-blocking pressure measuring device can prevent the medium in the equipment container from flowing out to cause blocking by continuously introducing the pressure in the gas detection equipment container, and can avoid gas backflow caused by overlarge pressure in the equipment container by additionally installing the check valve, so that the pressure is obtained from the pressure compensator, and the pressure value is measured more accurately. The compensation type anti-blocking pressure measuring device is assembled in a detachable connection mode, and the modular structure is easy to maintain.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example" or "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. And the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A compensation type anti-blocking pressure measuring device is used for measuring the pressure of an equipment container and is characterized by comprising an air pipe, a pressure reducing valve, a rotor flow meter, a pressure compensator and a pressure transmitter,
the pressure reducing valve, the rotor flowmeter and the pressure compensator are sequentially communicated in series through the air pipe, wherein the pressure reducing valve is close to an air inlet of the air pipe, and the pressure compensator is close to an air outlet of the air pipe;
the pressure transmitter is communicated with the pressure compensator and is used for measuring the pressure of the pressure compensator;
and the air outlet of the air pipe is communicated with the equipment container.
2. A compensated anti-clogging pressure measuring device according to claim 1, further comprising a check valve installed on said air pipe and in series communication with said pressure reducing valve and said rotameter, respectively, through said air pipe.
3. The compensated anti-blocking pressure measuring device according to claim 1, wherein the air pipe comprises a first air pipe and a second air pipe, the first air pipe is provided with a pressure compensator, the second air pipe is provided with the rotameter and the pressure reducing valve, the first air pipe and the second air pipe are detachably connected, and the pressure compensator and the pressure transmitter are detachably connected.
4. A compensated anti-clogging pressure measuring apparatus as claimed in claim 3, wherein a switch valve or a connection valve is provided between the first air pipe and the second air pipe, and a switch valve or a connection valve is provided between the pressure compensator and the pressure transmitter.
5. A compensated anti-clogging pressure measuring apparatus as defined in claim 1, wherein said air tube is removably and fixedly connected to said equipment container.
6. A compensated anti-clogging pressure measuring apparatus as defined in claim 1, wherein said air tube is connected to said equipment container by a connecting flange.
7. The compensated anti-blocking pressure measurement device according to claim 1, wherein the air outlet of the air pipe extends into the inner cavity of the equipment container, and the air outlet extending into the air pipe extends towards the bottom of the equipment container and forms an included angle of 8-10 degrees with the horizontal plane.
8. A compensated anti-clogging pressure measuring apparatus as claimed in claim 1, wherein said rotameter is provided with a support base.
9. A compensated anti-clogging pressure measuring device according to claim 1, wherein the formula is satisfied:
wherein S is1Is the cross-sectional area, S, of gas flow in the pressure compensator2Is that it isThe sectional area of the air outlet of the air pipe is epsilon, and the epsilon is the pipe resistance coefficient between the pressure compensator and the air outlet of the air pipe.
10. A compensated anti-clogging pressure measuring apparatus according to claim 9, wherein the pressure compensator is on the same horizontal plane as the air duct outlet or the error in the horizontal height between the pressure compensator and the air duct outlet is within a set range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921777123.0U CN210487156U (en) | 2019-10-22 | 2019-10-22 | Compensation type anti-blocking pressure measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921777123.0U CN210487156U (en) | 2019-10-22 | 2019-10-22 | Compensation type anti-blocking pressure measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210487156U true CN210487156U (en) | 2020-05-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921777123.0U Active CN210487156U (en) | 2019-10-22 | 2019-10-22 | Compensation type anti-blocking pressure measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210487156U (en) |
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2019
- 2019-10-22 CN CN201921777123.0U patent/CN210487156U/en active Active
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Address after: 201600 No.7, Lane 5398, e valley, Sheshan, shenzhuan Road, Songjiang District, Shanghai Patentee after: Shanghai Fuling Automation Control System Co.,Ltd. Address before: 201600 No.7, Lane 5398, e valley, Sheshan, shenzhuan Road, Songjiang District, Shanghai Patentee before: SHANGHAI FL-AUTOMATION Co.,Ltd. |