CN214121486U - Remote transmission differential pressure transmitter - Google Patents
Remote transmission differential pressure transmitter Download PDFInfo
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- CN214121486U CN214121486U CN202120163310.0U CN202120163310U CN214121486U CN 214121486 U CN214121486 U CN 214121486U CN 202120163310 U CN202120163310 U CN 202120163310U CN 214121486 U CN214121486 U CN 214121486U
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Abstract
The application is suitable for the technical field of industrial automatic control equipment, and provides a remote transmission differential pressure transmitter which further comprises a diaphragm capsule and an adjusting device, wherein a first storage cavity communicated with a low-pressure side storage cavity and a second storage cavity communicated with the first storage cavity are arranged in the diaphragm capsule; the first adjusting component of the adjusting device is used for adjusting the volume of the first storage cavity and the volume of the second storage cavity, and the second adjusting component is used for controlling the communication and the closing between the first storage cavity and the second storage cavity. The utility model provides a teletransmission differential pressure transmitter through the outside installation diaphragm capsule at teletransmission differential pressure transmitter body to adjust the volume of first storage cavity and the volume of second storage cavity through first adjusting part, adjust the error between high pressure side storage cavity and the low pressure side storage cavity, eliminated the poor problem that the precision is low that leads to of the volume difference and the temperature difference of teletransmission differential pressure transmitter both sides, improved the measurement accuracy of product.
Description
Technical Field
The application relates to the technical field of industrial automatic control equipment, in particular to a remote transmission differential pressure transmitter.
Background
Remote transmission differential pressure transmitters are widely used in high temperature industrial automatic control environments, and among them, remote transmission differential pressure transmitters based on the differential pressure principle are most commonly used. The differential pressure is the difference between any two measured pressures, which relates to the force balance between the high pressure side and the low pressure side of the meter itself, but the difference between the two sides cannot be completely eliminated in actual production, and the difference needs to be corrected by zero adjustment to eliminate errors. The zero setting mode of the instruments on the market is realized by electronic hardware (controller) and software programming, the principle is that the error value of the instrument is assumed to be fixed and unchanged, the instrument is only processed from display data, and the measurement result is obtained by subtracting the error value from the measured data. However, in practice, the difference between the oil filling amount and the shape of the two sides of the meter is different, so that the error values at different temperatures are different, the difference between the high pressure side and the low pressure side of the meter is not linear, the measurement accuracy is low, and the measurement result is inaccurate.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the application is to provide a remote transmission differential pressure transmitter, which aims to solve the technical problems that in the prior art, the remote transmission differential pressure transmitter is realized through software and hardware intelligent control, the principle is that the error value of an instrument is assumed to be fixed and not changed, and only processing is performed on display data, however, in practice, the oil filling quantity difference and the shape difference of two sides of the instrument are different, so that the error values at different temperatures are different, the difference value between the high-pressure side and the low-pressure side of the instrument is not in a linear relation, and the measurement precision is low.
In order to achieve the purpose, the technical scheme adopted by the application is as follows: the remote transmission differential pressure transmitter comprises a transmitter body and a control display device, wherein a high-pressure side storage cavity and a low-pressure side storage cavity are arranged in the transmitter body, and the control display device is used for acquiring pressure values of the high-pressure side storage cavity and the low-pressure side storage cavity; the remote transmission differential pressure transmitter further comprises:
the diaphragm capsule is internally provided with a first storage cavity communicated with the low-pressure side storage cavity and a second storage cavity communicated with the first storage cavity;
adjusting device, adjusting device including set up respectively in first adjusting part and second adjusting part on the bellows, first adjusting part is used for adjusting first storage cavity's volume with the volume of second storage cavity, second adjusting part is used for controlling first storage cavity with intercommunication between the second storage cavity with close.
Further, the first adjusting assembly comprises adjusting shafts respectively arranged in the first storage cavity and the second storage cavity;
the top ring is sleeved on the adjusting shaft and abuts against the end parts of the first storage cavity and the second storage cavity.
Further, the first adjusting component further comprises a sealing ring, and the sealing ring is attached between the top ring and the end portions of the first storage cavity and the second storage cavity.
Furthermore, the first adjusting assembly further comprises a fastening ring, the fastening ring is sleeved on the adjusting shaft, a first connecting portion is arranged on the fastening ring, a second connecting portion is arranged on the top ring, and the first connecting portion is connected with the second connecting portion to lock the adjusting shaft to rotate.
Furthermore, a rotary opening is formed in one end, close to the outer side of the diaphragm capsule, of the fastening ring.
Furthermore, a rotating head is arranged at one end, close to the outer side of the diaphragm capsule, of the adjusting shaft.
Further, the rotating head is a square head; or the rotating head is provided with a linear opening; or
The rotating head is provided with a cross-shaped opening; or
The rotating head is provided with a square hole or a polygonal hole.
Further, the second adjustment assembly includes:
the adjusting seat is internally provided with an installation cavity and is arranged in the membrane box;
the adjusting valve core is rotatably arranged in the mounting cavity, one end of the adjusting valve core is abutted against the joint of the first storage cavity and the second storage cavity, the other end of the adjusting valve core is close to the outer side of the diaphragm capsule, and a rotating head is arranged at the other end of the adjusting valve core.
Furthermore, a cavity communicated with the second storage cavity is arranged on the diaphragm capsule, and the cavity is arranged at the joint of the first storage cavity and the second storage cavity;
the regulation seat includes:
the sealing ring is attached to the opening end of the containing cavity;
the fixed ring is provided with a compression ring connected with the sealing ring, and one end of the fixed ring, which is close to the outer side of the diaphragm capsule, is provided with a rotating port.
Further, a sealing element is arranged between the sealing ring and the opening end and used for sealing the connection part of the sealing ring and the containing cavity.
The application also provides a zero setting method for the remote transmission differential pressure transmitter in any embodiment, which comprises the following steps:
s1, adjusting a second adjusting component of the remote transmission differential pressure transmitter to enable the first storage cavity to be communicated with the second storage cavity, and enabling the low-pressure side storage cavity to be communicated with the second storage cavity;
s2, obtaining the current temperature value and the display value of the control display device;
s3, under the obtained current temperature value, controlling the first adjusting component to adjust the volume of the first storage cavity and the volume of the second storage cavity according to the obtained display value of the control display device, and when the display value of the control display device is a preset value, stopping adjusting the first adjusting component and locking and fixing the first adjusting component and the second adjusting component.
Further, in step S3, the method further includes the steps of:
s301, when the acquired display value of the control display device is a first preset range value, controlling the first adjusting assembly to enable the oil liquid in the second storage cavity to flow into the first storage cavity, and when the display value of the control display device is a preset value, stopping adjusting the first adjusting assembly, and locking and fixing the first adjusting assembly and the second adjusting assembly;
s302, when the acquired display value of the control display device is a second preset range value, the first adjusting assembly is controlled to enable the oil liquid in the first storage cavity to flow into the second storage cavity, when the display value of the control display device is a preset value, the first adjusting assembly is stopped to be adjusted, and the first adjusting assembly and the second adjusting assembly are locked and fixed.
Further, the zero setting method further comprises the following steps:
s4, respectively taking the current temperature value as the first temperature value t1A second temperature value t2A third temperature value t3... n temperature value tnThe steps S1, S2 and S3 are repeated next, and the preset value A is recorded1、A2、A3…AnAccording to the formula:
i A1-A2I ═ k + X1×(t2-t1)；
I A3-A2I ═ k + X2×(t3-t1)；
……
I An-An-1I ═ k + Xn×(tn-tn-1) (ii) a Wherein k is the measurement range precision of the remote transmission differential pressure transmitter, tnGreater than tn-1X is a constant;
s5, obtaining X1、X2、X3、……XnAnd fitting a horizontal straight line by using a finite element function to obtain the final constant X.
The application provides a teletransmission pressure differential transmitter's beneficial effect lies in: compared with the prior art, the remote transmission differential pressure transmitter of this application, through the outside installation diaphragm capsule at the remote transmission differential pressure transmitter body to adjust the volume of first storage cavity and the volume of second storage cavity through first adjusting part, and then adjust the error between high pressure side storage cavity and the low pressure side storage cavity, make control display device's display value reach true measured value, eliminated the problem that the precision that the volume difference and the temperature difference of remote transmission differential pressure transmitter both sides lead to is low, improved the measurement accuracy of product.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic perspective view of a remote differential pressure transmitter provided by an embodiment of the present application;
FIG. 2 is a schematic diagram of a partial configuration of a remote differential pressure transmitter provided by an embodiment of the present application;
FIG. 3 is an enlarged schematic view of portion A of FIG. 2;
FIG. 4 is a schematic view of a bellows of a remote differential pressure transmitter according to an embodiment of the present application;
FIG. 5 is a schematic cross-sectional view of the remote differential pressure transmitter of FIG. 4 taken along the direction B-B;
FIG. 6 is a schematic view-angle structure diagram of a remote differential pressure transmitter according to an embodiment of the present application
FIG. 7 is a schematic cross-sectional view of the remote differential pressure transmitter of FIG. 6 taken along the direction C-C;
FIG. 8 is a schematic flow chart of a zeroing method according to another embodiment of the present application;
fig. 9 is another schematic flow chart of a zeroing method according to another embodiment of the present application.
Reference numerals referred to in the above figures are detailed below:
1-a transmitter body; 2-controlling the display device; 3-a capsule; 4-a regulating device;
31-a first storage cavity; 32-a second storage cavity; 33-a cavity;
41-a first adjustment assembly; 42-a second adjustment assembly;
411-an adjustment axis; 412-top ring; 413-sealing ring; 414-a fastening ring; 415-rotating opening; 416-a rotating head;
421-a regulating seat; 422-sealing ring; 423-fixed bad; 424-compression ring; 425-adjusting the valve core; 426-a seal; 427-turning round.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In order to explain the technical solutions of the present application, the following detailed descriptions are made with reference to specific drawings and examples.
As shown in fig. 1 to 7, an embodiment of the present application provides a remote transmission differential pressure transmitter, including a transmitter body 1 and a control display device 2, where a high-pressure side storage cavity and a low-pressure side storage cavity are provided in the transmitter body 1, and the control display device 2 is configured to obtain pressure values of the high-pressure side storage cavity and the low-pressure side storage cavity; the remote transmission differential pressure transmitter further comprises a diaphragm capsule 3 and an adjusting device 4, wherein a first storage cavity 31 communicated with the low-pressure side storage cavity and a second storage cavity 32 communicated with the first storage cavity 31 are arranged in the diaphragm capsule 3; the adjusting device 4 comprises a first adjusting component 41 and a second adjusting component 42 which are respectively arranged on the bellows 3, wherein the first adjusting component 41 is used for adjusting the volume of the first storage cavity 31 and the volume of the second storage cavity 32, and the second adjusting component 42 is used for controlling the communication and the closing between the first storage cavity 31 and the second storage cavity 32.
The embodiment of the application provides a teletransmission differential pressure transmitter, through the outside installation diaphragm capsule 3 at teletransmission differential pressure transmitter body 1, and adjust the volume of first storage cavity 31 and the volume of second storage cavity 32 through first adjusting part 41, and then adjust the error between high pressure side storage cavity and the low pressure side storage cavity, make the display value of control display device 2 reach true measured value, the problem that the precision is low that volume difference and the temperature difference of teletransmission differential pressure transmitter both sides lead to has been eliminated, the measurement accuracy of product has been improved.
Further, in an embodiment of the present application, as shown in fig. 2 to 5, the first adjusting assembly 41 includes an adjusting shaft 411 and a top ring 412, the adjusting shaft 411 and the top ring 412 are respectively disposed in the first storage cavity 31 and the second storage cavity 32, the top ring 412 is sleeved on the adjusting shaft 411, and the top ring 412 abuts against the end portions of the first storage cavity 31 and the second storage cavity 32.
In this embodiment, when the first adjusting member 41 adjusts the first storage cavity 31 and the second storage cavity 32, the adjusting shafts 411 disposed in the first storage cavity 31 and the second storage cavity 32 can be adjusted respectively, so that the adjustment is easy, and the top ring 412 is used to seal the ends of the first storage cavity 31 and the second storage cavity 32.
In the above embodiment, as shown in fig. 2 and 3, the first adjusting assembly 41 further includes a sealing ring 413, and the sealing ring 413 is attached between the top ring 412 and the ends of the first storage cavity 31 and the second storage cavity 32. Alternatively, the packing 413 may be an O-ring 413, which may be made of a rubber material, providing a sealing effect of the top ring 412 with the ends of the first and second storage cavities 31 and 32.
Further, in an embodiment that the first adjusting component 41 includes an adjusting shaft 411 and a top ring 412, as shown in fig. 2 and fig. 3, the first adjusting component 41 further includes a fastening ring 414, the fastening ring 414 is sleeved on the adjusting shaft 411, a first connecting portion is disposed on the fastening ring 414, a second connecting portion is disposed on the top ring 412, and the first connecting portion is connected with the second connecting portion to lock the adjusting shaft 411 to rotate.
In this embodiment, when the adjustment shaft 411 does not need to be adjusted, the fastening ring 414 and the top ring 412 can be tightened to lock the adjustment shaft 411 against rotation, and alternatively, the first connecting portion and the second connecting portion can be an internal thread and an external thread.
Further, as shown in fig. 2 and 3, in order to facilitate the rotation of the fastening ring 414, a rotation opening 415 is provided at one end of the fastening ring 414 near the outer side of the bellows 3. The rotation opening 415 may be provided in plurality at an end of the fastening ring 414, and may be rotated by a wrench designed to be matched with the rotation opening 415.
Further, as shown in fig. 2 and 3, in the embodiment where the first adjusting assembly 41 includes an adjusting shaft 411 and a top ring 412, a rotating head 416 is disposed on the adjusting shaft 411 near an outer side end of the bellows 3.
Further, as shown in fig. 2, the rotating head 416 is a square head; or the rotating head 416 is provided with a linear opening; or
The rotating head 416 is provided with a cross-shaped opening; or
The rotating head 416 is provided with a square hole or a polygonal hole.
In this embodiment, the design of the rotating head 416 can be adjusted by a straight screwdriver or a cross screwdriver or a wrench with a square head when adjusting the adjusting shaft 411, and the adjustment is performed without using a special tool, so that the operation is more convenient.
It should be noted that the adjusting shaft 411 can also be connected with the adjusting shaft 411 of the first storage cavity 31 and the second storage cavity 32 through a synchronous pulley and two meshing gears by a servo motor, so as to perform driving adjustment and facilitate automatic control.
Further, in one embodiment of the present application, as shown in fig. 2, 3, 6 and 7, the second adjustment assembly 42 includes an adjustment seat 421 to adjust the valve core 425, specifically, a mounting cavity is provided in the adjustment seat 421 and is provided in the bellows 3; the adjusting valve element 425 is rotatably disposed in the mounting cavity, one end of the adjusting valve element 425 abuts against a connection portion of the first storage cavity 31 and the second storage cavity 32, an end portion of the end of the adjusting valve element 425 may be a tapered surface so as to block a communication portion between the first storage cavity and the second storage cavity 32, the other end of the adjusting valve element 425 is close to the outer side of the capsule 3, a swivel 427 is disposed at the other end of the adjusting valve element 425, and one end of the swivel 427 close to the outer side of the capsule 3 may be provided with a linear opening, a cross opening, a polygonal opening, or the like, which may be specifically the same as the structure of the swivel 416 in the above embodiment.
Further, as shown in fig. 4 and 5, a cavity 33 communicated with the second storage cavity 32 is disposed on the bellows 3, and the cavity 33 is disposed at a connection position of the first storage cavity 31 and the second storage cavity 32; the adjusting seat 421 comprises a sealing ring 422 and a fixing ring 423, and the sealing ring 422 is attached to the open end of the cavity 33; the fixing ring 423 is provided with a pressing ring 424 connected with the sealing ring 422, and a rotating port is arranged at one end of the fixing ring 423, which is close to the outer side of the bellows 3. The adjusting valve core 425 penetrates through the containing cavity 33 and can abut against the joint of the first storage cavity 31 and the second storage cavity 32, when in adjustment, the fixing ring 423 can be loosened through a wrench matched with the rotating port, namely the adjusting valve core 425 rotates to the outer side direction of the bellows 3 and retreats for a certain distance, then the adjusting valve core 425 retreats for a certain distance to the outer side direction of the bellows 3 through a tool matched with the rotating head 426, and further the communication between the first storage cavity and the second storage cavity 32 is realized.
In the above embodiment, as further shown in fig. 2 and 3, a sealing member 426 is disposed between the sealing ring 422 and the open end, and the sealing member 426 is used for sealing a connection between the sealing ring 422 and the cavity 33. The sealing member 426 may be an o-ring 413, or other sealing member. The sealing ring is used for sealing the joint of the sealing ring 422 and the cavity 33, so that the sealing effect is ensured.
As shown in fig. 8 and 9, an embodiment of the present application further provides a zero setting method for a remote transmission differential pressure transmitter according to any one of the above embodiments, which may perform oil filling on a high-pressure side storage cavity of the remote transmission differential pressure transmitter at a current temperature value, and stop the oil filling when a pressure value displayed by the control display device 2 reaches a first preset pressure value, so as to seal the high-pressure side storage cavity;
and (3) filling oil into the low-pressure side storage cavity of the remote transmission differential pressure transmitter, and stopping filling the oil when the pressure value displayed by the control display device 2 is zero, and sealing the low-pressure side storage cavity.
The zero setting method comprises the following steps:
s1, adjusting a second adjusting component of the remote transmission differential pressure transmitter to enable the first storage cavity to be communicated with the second storage cavity, and enabling the low-pressure side storage cavity to be communicated with the second storage cavity;
s2, obtaining the current temperature value and the display value of the control display device;
s3, under the obtained current temperature value, controlling the first adjusting component to adjust the volume of the first storage cavity and the volume of the second storage cavity according to the obtained display value of the control display device, and when the display value of the control display device is a preset value, stopping adjusting the first adjusting component and locking and fixing the first adjusting component and the second adjusting component.
Specifically, it can be assumed that when the pressure of the high-pressure side storage cavity is greater than that of the low-pressure side storage cavity, the control display device, that is, the display value of the gauge head of the remote differential pressure transmitter, is a positive value (a first preset range value); when the pressure of the high-pressure side storage cavity is smaller than that of the low-pressure side storage cavity, the indication value of the meter head is a negative value.
Step S301, when the obtained display value of the control display device is a first preset range value (positive value), controlling the first adjusting assembly to make the oil in the second storage cavity flow into the first storage cavity, that is, moving the fastening ring of the first adjusting assembly a certain distance towards the outer side of the bellows, withdrawing the adjusting shaft of the second storage cavity a certain distance by using a tool, such as a straight screwdriver, and then advancing the adjusting shaft located in the first storage cavity a certain distance towards the inner side of the bellows by using a straight screwdriver, when the display value of the control display device is a preset value, which may be that the display value approaches the preset value infinitely, stopping adjusting the first adjusting assembly, locking and fixing the first adjusting assembly and the second adjusting assembly, advancing the adjusting valve core by using a straight screwdriver to close the communication between the first storage cavity and the second storage cavity, then locking is carried out through a fixing ring;
step S302, when the obtained display value of the control display device is a second preset range value (negative value), controlling the first adjusting assembly to make the oil in the first storage cavity flow into the second storage cavity, that is, moving the fastening ring of the first adjusting assembly a certain distance towards the inner side of the bellows, advancing the adjusting shaft of the second storage cavity a certain distance by using a tool, such as a straight screwdriver, and withdrawing the adjusting shaft located in the first storage cavity a certain distance towards the outer side of the bellows by using the straight screwdriver, when the display value of the control display device is a preset value, which may be infinite approaching to the preset value, when the display value of the control display device is a preset value, stopping adjusting the first adjusting assembly, and locking and fixing the first adjusting assembly and the second adjusting assembly, the specific locking operation is the same as the step S301, and need not be described in detail herein.
Further, as shown in fig. 9, in an embodiment of the present application, the zeroing method further includes the steps of:
s4, respectively taking the current temperature value as the first temperature value t1A second temperature value t2A third temperature value t3... n temperature value tnThe steps S1, S2 and S3 are repeated next, and the preset value A is recorded1、A2、A3…AnAccording to the formula:
i A1-A2I ═ k + X1×(t2-t1)；
I A3-A2I ═ k + X2×(t3-t1)；
……
I An-An-1I ═ k + Xn×(tn-tn-1) (ii) a Wherein k is the measurement range precision of the remote transmission differential pressure transmitter, tnGreater than tn-1X is a constant;
s5, obtaining X1、X2、X3、……XnAnd fitting a horizontal straight line by using a finite element function to obtain the final constant X. The processor processes the data according to the constant quantity, so that the remote differential pressure transmitter can obtain a measured value closer to the real measured value.
For example, the above experiments of step S1, step S2 and step S3 are performed at the current temperature of 15 deg.C, 25 deg.C and 35 deg.C and the data are recorded, respectively, A1、A2And A3And the meter range precision k of the remote transmission differential pressure transmitter is 0.2
Assuming constant Xn
I A1-A2I ═ 0.2+ X1×(25℃-15℃)；
I A3-A2I ═ 0.2+ X2×(35℃-25℃)；
……
Separately determine X1、X2、X3、……XnAnd fitting a horizontal straight line by using a finite element function to obtain the final constant X.
According to the method, the problem of low precision caused by volume difference and temperature difference at two sides of the remote transmission differential pressure transmitter is solved through mechanical zero adjustment and data processing, and the measurement precision of the product is improved.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A remote transmission differential pressure transmitter comprises a transmitter body and a control display device, wherein a high-pressure side storage cavity and a low-pressure side storage cavity are arranged in the transmitter body, and the control display device is used for acquiring pressure values of the high-pressure side storage cavity and the low-pressure side storage cavity; its characterized in that, teletransmission pressure differential transmitter still includes:
the diaphragm capsule is internally provided with a first storage cavity communicated with the low-pressure side storage cavity and a second storage cavity communicated with the first storage cavity;
adjusting device, adjusting device including set up respectively in first adjusting part and second adjusting part on the bellows, first adjusting part is used for adjusting first storage cavity's volume with the volume of second storage cavity, second adjusting part is used for controlling first storage cavity with intercommunication between the second storage cavity with close.
2. The remote differential pressure transmitter of claim 1, wherein the first adjustment assembly includes adjustment shafts disposed in the first reservoir chamber and the second reservoir chamber, respectively;
the top ring is sleeved on the adjusting shaft and abuts against the end parts of the first storage cavity and the second storage cavity.
3. The remote differential pressure transmitter of claim 2, wherein the first adjustment assembly further comprises a sealing ring disposed between the top ring and the ends of the first and second storage cavities.
4. The remote differential pressure transmitter of claim 2, wherein the first adjusting assembly further comprises a fastening ring, the fastening ring is sleeved on the adjusting shaft, and a first connecting portion is disposed on the fastening ring, and a second connecting portion is disposed on the top ring, and the first connecting portion is connected with the second connecting portion for locking the adjusting shaft to rotate.
5. The remote differential pressure transmitter of claim 4, wherein the tightening ring has a swivel opening at an end thereof adjacent the outer side of the bellows.
6. The remote differential pressure transmitter of claim 2, wherein the adjustment shaft has a swivel head disposed at an end thereof adjacent the outer side of the bellows.
7. The remote differential pressure transmitter of claim 6, wherein the rotating head is a square head; or the rotating head is provided with a linear opening; or
The rotating head is provided with a cross-shaped opening; or
The rotating head is provided with a square hole or a polygonal hole.
8. The remote differential pressure transmitter of claim 1, wherein the second adjustment assembly comprises:
the adjusting seat is internally provided with an installation cavity and is arranged in the membrane box;
the adjusting valve core is rotatably arranged in the mounting cavity, one end of the adjusting valve core is abutted against the joint of the first storage cavity and the second storage cavity, the other end of the adjusting valve core is close to the outer side of the diaphragm capsule, and a rotating head is arranged at the other end of the adjusting valve core.
9. The remote differential pressure transmitter of claim 8, wherein the bellows defines a cavity in communication with the second reservoir chamber, the cavity being defined at a junction of the first reservoir chamber and the second reservoir chamber;
the regulation seat includes:
the sealing ring is attached to the opening end of the containing cavity;
the fixed ring is provided with a compression ring connected with the sealing ring, and one end of the fixed ring, which is close to the outer side of the diaphragm capsule, is provided with a rotating port.
10. The remote differential pressure transmitter of claim 9, wherein a seal is disposed between the seal ring and the open end, the seal being configured to seal a connection between the seal ring and the receptacle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120163310.0U CN214121486U (en) | 2021-01-20 | 2021-01-20 | Remote transmission differential pressure transmitter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120163310.0U CN214121486U (en) | 2021-01-20 | 2021-01-20 | Remote transmission differential pressure transmitter |
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| CN214121486U true CN214121486U (en) | 2021-09-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368723A (en) * | 2021-11-10 | 2022-04-19 | 浙江中控技术股份有限公司 | Quantitative oil filling method for base diaphragm capsule |
-
2021
- 2021-01-20 CN CN202120163310.0U patent/CN214121486U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114368723A (en) * | 2021-11-10 | 2022-04-19 | 浙江中控技术股份有限公司 | Quantitative oil filling method for base diaphragm capsule |
| CN114368723B (en) * | 2021-11-10 | 2023-12-22 | 浙江中控技术股份有限公司 | Quantitative oil filling method for base diaphragm capsule |
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