Differential pressure transmitter with compensation function

Abstract

The utility model belongs to the technical field of differential pressure transmitters, in particular to a differential pressure transmitter with a compensation function, which is characterized in that the pressure of a working medium in a process pipeline acts on an internal corrugated diaphragm, the corrugated diaphragm displaces, and the measured pressure is transmitted to a sensitive element of a differential pressure sensing module; signals of the sensitive element and signals of the medium temperature sensor are sent into the differential pressure transmitting module together through a cable, the differential pressure transmitting module completes temperature additional error compensation of pressure signals through a medium temperature additional error compensation algorithm, and the compensation effect is achieved. In order to prevent the sensitive element from shaking excessively, a worker can rotate a turn buckle to adjust the distance between two groups of inner screw rods, so that two adjacent groups of sliding blocks drive a top positioning frame to stably and oppositely move in a top sliding groove, and an internal spring shock absorber is matched, so that a fan-shaped rubber block on the inner side is attached to the sensitive element; the shaking amplitude of the transmitter body is reduced, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of differential pressure transmitters, and in particular relates to a differential pressure transmitter with a compensation function. Background Art

[0002] A differential pressure transmitter is a self-balancing detection instrument that measures the pressure difference of the medium in a process pipeline or tank, and converts the measured differential pressure value into a current signal output through data conversion and square root extraction. It uses the working principle of negative feedback to overcome the influence of adverse factors such as component materials and processing technology. It is mainly composed of a measuring part, an amplifier and a feedback part, and is often used to measure pressure, differential pressure, vacuum, liquid level, flow and density, etc.

[0003] After searching, the publication number: CN213812710U announced a high-precision differential pressure transmitter with temperature and pressure compensation. In the utility model, by starting the micro motor to drive the sliding rod to rotate, the fixed frame can drive the brush plates at both ends to rotate. At the same time, rotating the sealing cap to separate it from the connecting pipe and pulling it out horizontally can make the rotating fixed frame clean the inner wall of the connecting pipe through the brush plate, and bring the cleaned debris out of the connecting pipe through the filter plate and the rubber gasket, so as to clean the connecting pipe to prevent clogging due to long-term use. However, the operation of the micro motor and the pressure difference of the external pipeline will increase the shaking amplitude of the transmitter, thereby reducing the service life of the pressure transmitter.

[0004] Therefore, a differential pressure transmitter with compensation function is designed to solve the above problems. Utility Model Content

[0005] To solve the problems raised in the above background technology. The utility model provides a differential pressure transmitter with compensation function, the interface of the cable is connected to the capillary through an octagonal metal pad, and the process pipeline can be connected to the bottom corrugated flange. When in use, the pressure of the working medium in the process pipeline acts on the internal corrugated diaphragm, the corrugated diaphragm is displaced, and the measured pressure is transmitted to the sensitive element of the pressure differential pressure sensing module. The signal of the sensitive element is sent to the differential pressure transmission module together with the signal of the medium temperature sensor through the cable. The differential pressure transmission module completes the temperature additional error compensation of the pressure signal through the medium temperature additional error compensation algorithm to achieve the compensation effect.

[0006] Install the mounting frame on the pipeline, and the silicon piezoresistor of the transmitter body penetrates the sealing gasket and is connected to the force-bearing component. When the gas is flowing, in order to prevent the sensitive element from excessively shaking, the staff can adjust the distance between the two sets of inner screws by turning the basket bolt, so that the two adjacent sets of sliders drive the top positioning frame to move smoothly toward each other along the top slide groove, and cooperate with the internal spring shock absorber to make the inner fan-shaped rubber block fit with the sensitive element, thereby achieving a limiting effect, reducing the shaking amplitude of the transmitter body, and prolonging the service life of the device.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a differential pressure transmitter with compensation function, including a compensated differential pressure transmitter, the compensated differential pressure transmitter including a transmitter body, a corrugated diaphragm, a corrugated flange, a capillary and a limit assembly, the corrugated diaphragm is clamped on the inner side of the top interface of the capillary, the corrugated flange is fixedly connected to the two sides of the bottom of the transmitter body, the capillary is fixedly connected to the two sides of the top of the transmitter body, and the limit assembly is clamped on the bottom of the transmitter body.

[0008] As a preferred differential pressure transmitter with compensation function of the utility model, the limit assembly includes a sealing gasket, a positioning frame, a slider, a fan-shaped rubber block and a mounting frame, the sealing gasket is fixedly connected to the inner side of the mounting frame, the slider is slidably sleeved inside the mounting frame, the positioning frame is fixedly connected to the top of the slider, and the fan-shaped rubber block is slidably sleeved on the inner side of the positioning frame.

[0009] As a preferred differential pressure transmitter with compensation function of the utility model, a spring shock absorber is further arranged inside the positioning frame, and two sides of the spring shock absorber are respectively fixedly connected to the sector-shaped rubber block and the opposite side surfaces of the positioning frame.

[0010] As a preferred embodiment of the differential pressure transmitter with compensation function of the utility model, two groups of positioning frames are provided, and the two groups of positioning frames are symmetrically distributed on the top of the mounting frame.

[0011] As a preferred embodiment of the differential pressure transmitter with compensation function of the utility model, the opposite side of the positioning frame is also fixedly connected with a basket bolt.

[0012] As a preferred embodiment of the differential pressure transmitter with compensation function of the utility model, a slide groove with a diameter equal to the size of the sliding block is further provided on the inner side of the mounting frame.

[0013] As a preferred differential pressure transmitter with compensation function of the utility model, a temperature sensor is also arranged on the inner side of the transmitter body.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. In the utility model, the pressure of the working medium in the process pipeline acts on the internal corrugated diaphragm, the corrugated diaphragm is displaced, and the measured pressure is transmitted to the sensitive element of the pressure differential pressure sensing module. The signal of the sensitive element is sent to the differential pressure transmitting module together with the signal of the medium temperature sensor through the cable. The differential pressure transmitting module completes the temperature additional error compensation of the pressure signal through the medium temperature additional error compensation algorithm to achieve the compensation effect.

[0016] 2. In the utility model, the silicon piezoresistor of the transmitter body passes through the sealing gasket and is connected to the force-bearing component. When the gas is flowing, in order to prevent the sensitive element from excessively shaking, the device can adjust the distance between the two sets of inner screws by the staff turning the basket bolt, so that the two adjacent sets of sliders drive the top positioning frame to move smoothly toward each other along the top slide groove, and cooperate with the internal spring shock absorber to make the inner fan-shaped rubber block fit with the sensitive element, thereby achieving a limiting effect, reducing the shaking amplitude of the transmitter body, and improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is the distribution diagram of the corrugated diaphragm in the utility model;

[0020] Figure 3 It is a structural schematic diagram of the limit assembly in the utility model;

[0021] Figure 4 It is a cross-sectional view of the positioning frame in the utility model;

[0022] In the figure:

[0023] 1. Compensated differential pressure transmitter; 11. Transmitter body; 12. Corrugated diaphragm; 13. Corrugated flange; 14. Capillary tube; 15. Limit assembly; 151. Sealing gasket; 152. Positioning frame; 153. Sliding block; 154. Fan-shaped rubber block; 155. Mounting frame; 2. Spring shock absorber; 3. Basket bolt; 4. Slide; 5. Temperature sensor; 6. Sealing cap; 7. Octagonal metal pad. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1 As shown:

[0026] A differential pressure transmitter with compensation function is known from CN213812710U. By starting a micro motor to drive the sliding rod to rotate, the fixed frame can drive the brush plates at both ends to rotate. At the same time, the cover cap is rotated to separate it from the connecting pipe and pulled out horizontally, so that the rotating fixed frame can clean the inner wall of the connecting pipe through the brush plate, and the cleaned debris is brought out of the connecting pipe through the filter plate and the rubber gasket, thereby cleaning the connecting pipe to prevent clogging due to long-term use. However, the operation of the micro motor and the pressure difference of the external pipeline will increase the shaking amplitude of the transmitter, thereby reducing the service life of the pressure transmitter. On this basis, a compensated differential pressure transmitter 1 is added.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown:

[0028] In an optional embodiment: the compensated differential pressure transmitter 1 includes a transmitter body 11, a corrugated diaphragm 12, a corrugated flange 13, a capillary 14 and a limit assembly 15, the corrugated diaphragm 12 is clamped on the inner side of the top interface of the capillary 14, the corrugated flange 13 is fixedly connected to the bottom sides of the transmitter body 11, the capillary 14 is fixedly connected to the top sides of the transmitter body 11, the limit assembly 15 is clamped on the bottom of the transmitter body 11, and the inner side of the mounting frame 155 is also provided with a slide groove 4 with a diameter equal to that of the slider 153, and the inner side of the transmitter body 11 is also provided with a temperature sensor 5.

[0029] In this embodiment: open the sealing cap 6, connect the interface of the cable to the capillary 14 through the octagonal metal gasket 7, and the process pipeline can be connected to the bottom corrugated flange 13. When in use, the pressure of the working medium in the process pipeline acts on the internal corrugated diaphragm 12, and the corrugated diaphragm 12 is displaced. The measured pressure is transmitted to the sensitive element of the pressure differential pressure sensing module. The signal of the sensitive element is sent to the differential pressure transmission module together with the signal of the medium temperature sensor 5 through the cable. The differential pressure transmission module completes the temperature additional error compensation of the pressure signal through the medium temperature additional error compensation algorithm to achieve the compensation effect.

[0030] More specifically:

[0031] like Figure 1 , Figure 3 and Figure 4 As shown:

[0032] In an optional embodiment: the limiting assembly 15 includes a sealing gasket 151, a positioning frame 152, a slider 153, a fan-shaped rubber block 154 and a mounting frame 155, the sealing gasket 151 is fixedly connected to the inner side of the mounting frame 155, the slider 153 is slidably sleeved inside the mounting frame 155, the positioning frame 152 is fixedly connected to the top of the slider 153, the fan-shaped rubber block 154 is slidably sleeved on the inner side of the positioning frame 152, and a spring shock absorber 2 is also arranged inside the positioning frame 152, and both sides of the spring shock absorber 2 are respectively fixedly connected to the fan-shaped rubber block 154 and the opposite side surfaces of the positioning frame 152, two groups of positioning frames 152 are provided, and the two groups of positioning frames 152 are symmetrically distributed on the top of the mounting frame 155, and the opposite sides of the positioning frames 152 are also fixedly connected with basket bolts 3.

[0033] In this embodiment: the mounting frame 155 is installed on the pipeline, and the silicon piezoresistor of the transmitter body 11 passes through the sealing gasket 151 and is connected to the force-bearing component. When the gas is flowing, in order to prevent the sensitive element from excessively shaking, the device can adjust the distance between the two groups of inner screws by the staff turning the basket bolt 3, so that the two adjacent groups of sliders 153 drive the top positioning frame 152 to move smoothly toward each other along the top slide groove 4, and cooperate with the internal spring shock absorber 2 to make the inner fan-shaped rubber block 154 fit with the sensitive element, thereby achieving a limiting effect, reducing the shaking amplitude of the transmitter body 11, and improving the service life of the device.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A differential pressure transmitter with compensation function, comprising a compensated differential pressure transmitter (1), Features: The compensated differential pressure transmitter (1) comprises a transmitter body (11), a corrugated diaphragm (12), a corrugated flange (13), a capillary tube (14) and a limit assembly (15); the corrugated diaphragm (12) is clamped on the inner side of the top interface of the capillary tube (14); the corrugated flange (13) is fixedly connected to both sides of the bottom of the transmitter body (11); the capillary tube (14) is fixedly connected to both sides of the top of the transmitter body (11); and the limit assembly (15) is clamped on the bottom of the transmitter body (11).

2. The differential pressure transmitter with compensation function according to claim 1, Features: The limiting assembly (15) comprises a sealing gasket (151), a positioning frame (152), a slider (153), a fan-shaped rubber block (154) and a mounting frame (155); the sealing gasket (151) is fixedly connected to the inner side of the mounting frame (155); the slider (153) is slidably sleeved inside the mounting frame (155); the positioning frame (152) is fixedly connected to the top of the slider (153); and the fan-shaped rubber block (154) is slidably sleeved inside the positioning frame (152).

3. The differential pressure transmitter with compensation function according to claim 2, Features: A spring shock absorber (2) is also arranged inside the positioning frame (152), and two sides of the spring shock absorber (2) are respectively fixedly connected to the fan-shaped rubber block (154) and the opposite side surfaces of the positioning frame (152).

4. The differential pressure transmitter with compensation function according to claim 3, Features: Two groups of the positioning frames (152) are provided, and the two groups of the positioning frames (152) are symmetrically distributed on the top of the mounting frame (155).

5. The differential pressure transmitter with compensation function according to claim 4, Features: A turnbuckle bolt (3) is also fixedly connected to the opposite side of the positioning frame (152).

6. The differential pressure transmitter with compensation function according to claim 2, Features: The inner side of the mounting frame (155) is also provided with a sliding groove (4) having a diameter equal to that of the sliding block (153).

7. The differential pressure transmitter with compensation function according to claim 1, Features: A temperature sensor (5) is also provided on the inner side of the transmitter body (11).

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