Corrosion-resistant differential pressure type pressure transmitter

Abstract

The utility model discloses a corrosion-resistant differential pressure type pressure transmitter, which belongs to the technical field of pressure monitoring systems and comprises a shell, an upper component, a circuit component and a probe component are mounted on the shell, and a sealing component for sealing is mounted between the circuit component and the probe component. The upper component and the probe component are mounted at upper and lower ends of the circuit component; by means of the mode, the isolation diaphragm changes along with pressure changes, pressure measurement is achieved, and the pressure sensor can adapt to micro pressure measurement, air tightness detection, pressure detection and liquid level measurement and is diversified in output mode, simple in structure and convenient to maintain; by customizing different threads of the probes on the two sides, the probe can be directly installed on a measuring pipeline or connected through a pressure guide pipe, setting of different alarm points and output delay time is achieved through connection of the circuit component and the input keyboard, and the anti-vibration, shielding and anti-interference capacities are enhanced through structural arrangement of the fixing piece.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure monitoring systems, in particular to a corrosion-resistant differential pressure transmitter. Background Art

[0002] A differential pressure transmitter is an instrument used to measure the pressure difference between two points. It is widely used in industrial automation, fluid dynamics, chemical industry, petroleum, food and pharmaceutical industries. Differential pressure transmitters usually convert the measured pressure difference into a standard electrical signal for subsequent data processing and monitoring.

[0003] For example, Chinese patent application CN118243280B discloses a differential pressure transmitter, including a differential pressure transmitter sensing module, the upper end of the differential pressure transmitter sensing module is slidably connected to the differential pressure transmitter display module; a take-up mechanism, the take-up mechanism includes: a circular groove, a small motor, a take-up reel, a sensor line, a clamp, a limit frame and a docking groove, the circular groove is opened in the differential pressure transmitter sensing module, the small motor can be installed in the differential pressure transmitter sensing module, the small motor is fixedly connected in the circular groove, and can be used to drive the take-up mechanism to operate.

[0004] However, the differential pressure transmitter is bulky when installed, making it difficult to adapt to use in different spaces. It cannot accurately detect small pressure differences, has low precision, and has a narrow application range.

[0005] Based on this, the utility model designs a corrosion-resistant differential pressure transmitter to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a corrosion-resistant differential pressure transmitter.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] Corrosion-resistant differential pressure transmitter, including housing,

[0009] The housing is provided with an upper component for transmitting signals, a circuit component for circuit connection, and a probe component for pressure detection. A sealing component for sealing is installed between the circuit component and the probe component. The upper component and the probe component are installed at the upper and lower ends of the circuit component. A cavity for accommodating the circuit component is formed between the upper component, the housing, and the probe component.

[0010] The upper component includes a five-core plug-in and a threaded shell, the lower end of the five-core plug-in is fixedly connected to the threaded shell, the upper and lower ends of the threaded shell are provided with threads, and the lower end of the threaded shell is threadedly connected to the shell;

[0011] The probe assembly includes a probe connector, an isolation diaphragm and a probe. The upper end of the probe connector is interference fit with the shell. The probe is fixedly installed on one side of the probe connector. The isolation diaphragm is fixedly installed between the probe connector and the probe.

[0012] Furthermore, the upper end of the shell is provided with a stepped hole for use with the threaded shell, the lower end of the shell is provided with a stepped hole for use with the probe connector, and the interior of the shell is in a hole shape.

[0013] Furthermore, a through hole is provided on the inner side of the threaded shell, and the threaded shell and the five-core plug-in are fixedly connected by glue filling and interference fit.

[0014] Furthermore, two isolation diaphragms and probes are provided, and the two probes are provided on the left and right sides of the probe connector, and the isolation diaphragm is an elastic component.

[0015] Furthermore, the probe is set to be cylindrical, with an inner circular groove at the bottom of the probe, an internal threaded blind hole for connecting to the measured device at the center of the probe, and two symmetrical wrench slots on the side of the probe.

[0016] Furthermore, the circuit assembly includes a fixing part and a circuit component. The circuit component is fixedly installed on the inner side of the shell. The circuit component is semi-elliptical. Four bayonet holes are respectively opened at the upper and lower ends of the inner wall of the circuit component. The circuit component is fixedly connected to the fixing part through the bayonet holes.

[0017] Furthermore, the circuit component is composed of a pressure detection unit, a signal processing unit and a signal output unit. The output end of the pressure detection unit is connected to the input end of the signal processing unit, and the output end of the signal processing unit is connected to the input end of the signal output unit. The pressure detection unit is located on the inner side of the probe connector, and the circuit component is electrically connected to the input keyboard.

[0018] Furthermore, the sealing assembly includes a sealing ring and a sealing gasket, which are installed between the shell and the probe connector. The probe connector consists of a vertical small cylinder at the upper end and a horizontal large cylinder at the lower end. Two slots are provided on the outer wall of the vertical small cylinder at the upper end of the probe connector. The sealing ring and the sealing gasket are respectively clamped and installed in the upper and lower slots. The sealing ring and the sealing gasket are interference fit with the shell. Cylindrical steps are respectively provided on both sides of the horizontal large cylinder at the lower end of the probe connector and a through hole is opened in the center.

[0019] Compared with the existing technology, the utility model has the following beneficial effects: 1. The isolation diaphragm changes with the pressure, thereby realizing pressure measurement, which can be adapted to micro-pressure measurement, air tightness detection, pressure detection and liquid level measurement, with various output modes, simple structure and easy maintenance;

[0020] 2. By customizing different threads on both sides of the probe, it can be directly installed on the measuring pipe or connected through the pressure pipe. Through the connection between the circuit components and the input keyboard, different alarm points and output delay times can be set. The structural setting of the fixing parts enhances the vibration resistance, shielding and anti-interference capabilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0022] Figure 1 This is a front view of the corrosion-resistant differential pressure transmitter of the present utility model;

[0023] Figure 2 This is a left side view of the corrosion-resistant differential pressure transmitter of the present utility model;

[0024] Figure 3 This is an exploded view of the corrosion-resistant differential pressure transmitter of the present utility model;

[0025] Figure 4 This is a principle block diagram of the corrosion-resistant differential pressure transmitter of the utility model.

[0026] The numbers in the figure represent:

[0027] 1. Housing; 2. Upper assembly; 21. Five-core plug-in; 22. Threaded housing; 3. Circuit assembly; 31. Fixing piece; 32. Circuit component; 4. Sealing assembly; 41. Sealing ring; 42. Sealing gasket; 5. Probe assembly; 51. Probe connector; 52. Isolation diaphragm; 53. Probe. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0030] In some embodiments, please refer to the accompanying drawings of the specification. Figure 1-Figure 4 , a corrosion-resistant differential pressure transmitter, comprising a housing 1,

[0031] The housing 1 is provided with an upper component 2 for transmitting signals, a circuit component 3 for circuit connection, and a probe component 5 for pressure detection. A sealing component 4 for sealing is provided between the circuit component 3 and the probe component 5. The upper component 2 and the probe component 5 are installed at the upper and lower ends of the circuit component 3. A cavity for accommodating the circuit component 3 is formed between the upper component 2, the housing 1, and the probe component 5.

[0032] The upper component 2 includes a five-core plug-in 21 and a threaded shell 22. The lower end of the five-core plug-in 21 is fixedly connected to the threaded shell 22. The upper and lower ends of the threaded shell 22 are provided with threads. The lower end of the threaded shell 22 is threadedly connected to the housing 1.

[0033] The probe assembly 5 includes a probe connector 51, an isolation diaphragm 52 and a probe 53. The upper end of the probe connector 51 is connected to the housing 1 by interference fit. The probe 53 is fixedly installed on one side of the probe connector 51, and the isolation diaphragm 52 is fixedly installed between the probe connector 51 and the probe 53.

[0034] When the corrosion-resistant differential pressure transmitter is in normal use, external gas applies pressure to the isolation diaphragm 52, and the isolation diaphragm 52 adheres to the gas, causing the size of the isolation diaphragm 52 to change, resulting in a change in resistance, and then generating a measurement signal. The isolation diaphragm 52 changes with the pressure, thereby realizing pressure measurement. It can adapt to micro-pressure measurement, air tightness detection, pressure detection and liquid level measurement, with various output modes, simple structure and easy maintenance.

[0035] The upper end of the housing 1 is provided with a stepped hole for matching with the threaded shell 22 , and the lower end of the housing 1 is provided with a stepped hole for matching with the probe connector 51 . The interior of the housing 1 is in a hole shape.

[0036] The threaded shell 22 is provided with a through hole inside, and the threaded shell 22 and the five-core plug-in unit 21 are fixedly connected by glue filling and interference fit.

[0037] There are two isolation diaphragms 52 and two probes 53 . The two probes 53 are arranged on the left and right sides of the probe connector 51 . The isolation diaphragm 52 is an elastic component.

[0038] The probe 53 is cylindrical in shape, with an inner circular groove at the bottom and an inner threaded blind hole for connecting to the device under test at the center. Two symmetrical wrench slots are provided on the side of the probe 53 .

[0039] The circuit assembly 3 includes a fixing piece 31 and a circuit component 32. The circuit component 32 is fixedly installed on the inner side of the shell 1. The circuit component 32 is semi-elliptical. Four bayonet holes are respectively provided at the upper and lower ends of the inner wall of the circuit component 32. The circuit component 32 is fixedly connected to the fixing piece 31 through the bayonet holes.

[0040] The circuit component 32 is composed of a pressure detection unit, a signal processing unit and a signal output unit. The output end of the pressure detection unit is connected to the input end of the signal processing unit, and the output end of the signal processing unit is connected to the input end of the signal output unit. The pressure detection unit is located on the inner side of the probe connector 51, and the circuit component 32 is electrically connected to the input keyboard.

[0041] The sealing assembly 4 includes a sealing ring 41 and a sealing gasket 42, which are installed between the shell 1 and the probe connector 51. The probe connector 51 consists of a vertical small cylinder at the upper end and a horizontal large cylinder at the lower end. Two slots are provided on the outer wall of the vertical small cylinder at the upper end of the probe connector 51. The sealing ring 41 and the sealing gasket 42 are respectively clamped and installed in the upper and lower slots. The sealing ring 41 and the sealing gasket 42 are connected to the shell 1 by interference fit. Cylindrical steps are respectively provided on both sides of the horizontal large cylinder at the lower end of the probe connector 51, and a through hole is opened in the center.

[0042] When the corrosion-resistant differential pressure transmitter is in normal use, the two probes 53 are connected to the device to be tested. The gas in the device to be tested applies pressure to the isolation diaphragm 52, and the isolation diaphragm 52 adheres to the gas, causing the size of the isolation diaphragm 52 to change, resulting in a resistance change, and then generating a measurement signal. The pressure detection unit includes a pressure sensing circuit and an A / D conversion circuit, the signal processing unit includes a single-chip microcomputer, and the output unit includes an analog voltage output, a current signal output and an alarm point output; the output signal of the pressure sensing circuit is converted by the A / D conversion circuit and transmitted to an input end of the single-chip microcomputer; the corresponding output ends of the single-chip microcomputer are respectively connected to the alarm point output, and are connected to the analog voltage and current signal outputs through the D / A conversion circuit. By customizing different threads of the probes 53 on both sides, they can be directly installed on the measuring pipeline or connected through a pressure pipe. The connection between the circuit component 32 and the input keyboard realizes the setting of different alarm points and output delay times. The structural setting of the fixing part 31 enhances the vibration resistance, shielding and anti-interference capabilities.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A corrosion-resistant differential pressure transmitter, comprising a housing (1), characterized in that: An upper component (2) for transmitting signals, a circuit component (3) for circuit connection, and a probe component (5) for pressure detection are installed on the housing (1); a sealing component (4) for sealing is installed between the circuit component (3) and the probe component (5); the upper component (2) and the probe component (5) are installed at the upper and lower ends of the circuit component (3); and a cavity for accommodating the circuit component (3) is formed between the upper component (2), the housing (1), and the probe component (5); The upper component (2) comprises a five-core plug-in (21) and a threaded shell (22); the lower end of the five-core plug-in (21) is fixedly connected to the threaded shell (22); the upper and lower ends of the threaded shell (22) are provided with threads; and the lower end of the threaded shell (22) is threadedly connected to the housing (1); The probe assembly (5) comprises a probe connector (51), an isolation diaphragm (52) and a probe (53); the upper end of the probe connector (51) is connected to the housing (1) by interference fit; the probe (53) is fixedly mounted on one side of the probe connector (51); and the isolation diaphragm (52) is fixedly mounted between the probe connector (51) and the probe (53).

2. The corrosion-resistant differential pressure transmitter according to claim 1, characterized in that: The upper end of the shell (1) is provided with a stepped hole for use with the threaded shell (22), and the lower end of the shell (1) is provided with a stepped hole for use with the probe connector (51), and the interior of the shell (1) is in a hole shape.

3. The corrosion-resistant differential pressure transmitter according to claim 2, characterized in that: A through hole is provided inside the threaded shell (22), and the threaded shell (22) and the five-core plug-in unit (21) are fixedly connected by glue injection and interference fit.

4. The corrosion-resistant differential pressure transmitter according to claim 3, characterized in that: There are two isolation diaphragms (52) and two probes (53), and the two probes (53) are arranged on the left and right sides of the probe connector (51). The isolation diaphragm (52) is an elastic component.

5. The corrosion-resistant differential pressure transmitter according to claim 4, characterized in that: The probe (53) is set to be cylindrical, with an inner circular groove at the bottom of the probe (53), an inner thread blind hole for connecting to the measured device at the center of the probe (53), and two symmetrical wrench slots on the side of the probe (53).

6. The corrosion-resistant differential pressure transmitter according to claim 5, characterized in that: The circuit assembly (3) comprises a fixing member (31) and a circuit component (32). The circuit component (32) is fixedly mounted on the inner side of the housing (1). The circuit component (32) is semi-elliptical in shape. Four bayonet holes are respectively provided at the upper and lower ends of the inner wall of the circuit component (32). The circuit component (32) is fixedly connected to the fixing member (31) via the bayonet holes.

7. The corrosion-resistant differential pressure transmitter according to claim 6, characterized in that: The circuit component (32) consists of a pressure detection unit, a signal processing unit and a signal output unit. The output end of the pressure detection unit is connected to the input end of the signal processing unit, and the output end of the signal processing unit is connected to the input end of the signal output unit. The pressure detection unit is located inside the probe connector (51). The circuit component (32) is electrically connected to the input keyboard.

8. The corrosion-resistant differential pressure transmitter according to claim 7, characterized in that: The sealing assembly (4) comprises a sealing ring (41) and a sealing gasket (42). The sealing ring (41) and the sealing gasket (42) are installed between the housing (1) and the probe connector (51). The probe connector (51) consists of a vertical small cylinder at the upper end and a horizontal large cylinder at the lower end. Two slots are provided on the outer wall of the vertical small cylinder at the upper end of the probe connector (51). The sealing ring (41) and the sealing gasket (42) are respectively snap-fitted and installed in the upper and lower slots. The sealing ring (41) and the sealing gasket (42) are connected to the housing (1) by interference fit. Cylindrical steps are respectively provided on both sides of the horizontal large cylinder at the lower end of the probe connector (51), and a through hole is provided in the center.

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