Cylindrical differential pressure transmitter and pipe orifice connecting structure

Abstract

The utility model belongs to the field of differential pressure transmitters, particularly relates to a cylindrical differential pressure transmitter and a pipe orifice connecting structure, and aims to solve the problems that liquid or gas in an existing pipeline contains impurities, the service life of the sensor is shortened when the sensor is in direct contact with the liquid or the gas, and the detection precision of the differential pressure transmitter is influenced after a long time. In order to solve the problems of liquid leakage or gas leakage and poor sealing effect during pipe orifice connection of the differential pressure transmitter, the utility model provides the following scheme: the device comprises a shell, a plug, a circuit board and a sensor are respectively arranged in the shell, both the plug and the sensor are electrically connected with the circuit board, one end of the shell is fixedly communicated with a pipe orifice, and the other end of the shell is fixedly communicated with the pipe orifice. According to the utility model, the nut is continuously tightened, so that the connecting pipe can be driven to move towards one end of the pipe connecting port, the first sealing ring can be extruded, the pipe connecting port and the connecting pipe can be conveniently sealed, gas and water leakage is avoided, and the measurement precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of differential pressure transmitters, in particular to a cylindrical differential pressure transmitter and a pipe orifice connection structure. Background Art

[0002] In general, pressure transmitters are mainly composed of pressure element sensors (also called pressure sensors), measuring circuits and process connections. It can convert physical pressure parameters such as gas and liquid sensed by the pressure element sensor into standard electrical signals (such as 4-20mADC, etc.) to provide secondary instruments such as indicator alarms, recorders, regulators, etc. for measurement, indication and process regulation.

[0003] When using the existing differential pressure transmitter, the liquid or gas in the pipeline contains impurities, which directly contact the sensor and reduce its service life. In the long run, it will affect the detection accuracy of the differential pressure transmitter. When connecting the pipe mouth of the differential pressure transmitter, the traditional method of using threads is adopted, but liquid or air leakage may occur during fixing, and the sealing effect is not good. Utility Model Content

[0004] The purpose of the utility model is to solve the problems in the prior art that the liquid or gas in the pipeline contains impurities, which directly contact the sensor and reduce its service life. In the long run, it will affect the detection accuracy of the differential pressure transmitter, and may cause liquid leakage or air leakage when connecting the pipe mouth of the differential pressure transmitter, and the sealing effect is not good. A cylindrical differential pressure transmitter and a pipe mouth connection structure are proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A cylindrical differential pressure transmitter comprises a shell, wherein a plug, a circuit board and a sensor are respectively arranged inside the shell, wherein the plug and the sensor are electrically connected to the circuit board, one end of the shell is fixedly connected to a pipe port, the other end of the pipe port is equipped with an anti-blocking head, the other end of the shell is fixedly connected to a wire crimping cover, one end of the plug is electrically connected to a connecting wire, and the connecting wire is located inside the wire crimping cover.

[0007] A pipe mouth connection structure is used for connecting the differential pressure transmitter, comprising a connecting pipe, the connecting pipe is in contact with the pipe mouth, the connecting pipe is connected to a nut for circumferential rotation, a first sealing ring is embedded in one end of the pipe mouth, and the nut is threadedly connected to the pipe mouth.

[0008] In a possible design, the anti-blocking head is in a "hat" shape and is embedded in the pipe connection port.

[0009] In a possible design, the anti-blocking head is made of silicone.

[0010] In a possible design, a lower ring is fixedly connected to the interior of the shell, the sensor is located on the upper surface of the lower ring, an upper ring is provided on the upper surface of the sensor, and the upper ring is threadedly connected to the inner wall of the shell.

[0011] In a possible design, two second sealing rings are installed on the circumference of the sensor.

[0012] In a possible design, one end of the shell is fixedly connected to a fixing block.

[0013] In the present application, when assembling the differential pressure transmitter, the sensor is placed on the upper surface of the lower ring, and then the upper ring is placed on the upper surface of the sensor. The upper ring is threadedly connected to the housing to facilitate fixing the position of the sensor. The two second sealing rings on the circumference of the sensor facilitate sealing the sensor to avoid air leakage and water leakage. The connecting wire is connected to the plug to facilitate display by converting it into an electrical signal.

[0014] When connecting the pipeline, align the connecting pipe with the pipe port, install the first sealing ring at one end of the pipe port, rotate the connecting pipe in a circle with a nut, use two wrenches, one fixed on the fixing block and the other fixed on the nut, and continue to tighten the nut, which can drive the connecting pipe to move toward one end of the pipe port, squeeze the first sealing ring, and facilitate the sealing between the pipe port and the connecting pipe, avoid air leakage and water leakage, and improve the measurement accuracy;

[0015] During measurement, the liquid or gas in the connecting pipe will impact the anti-blocking head. Pure water is filled between the anti-blocking head and the sensor. At this time, the impact force of the connecting pipe on the anti-blocking head is equal to the impact force of pure water on the sensor. The sensor measures the pressure change and converts it into an electrical signal, which is transmitted and displayed through the circuit board, plug and connecting wire. This can effectively prevent impurities in the pipeline from affecting the measurement accuracy and extend the service life.

[0016] In the utility model, the cylindrical differential pressure transmitter and the pipe port connection structure, through the setting of the first sealing ring, continuously tightening the nut can drive the connecting pipe to move toward one end of the pipe port, can squeeze the first sealing ring, facilitate the sealing between the pipe port and the connecting pipe, avoid air leakage and water leakage, and improve the measurement accuracy;

[0017] In the utility model, the cylindrical differential pressure transmitter and the pipe mouth connection structure are provided with an anti-blocking head. The impact force of the connecting pipe on the anti-blocking head is equal to the impact force of pure water on the sensor. The sensor measures the pressure change, which can effectively prevent impurities in the pipeline from affecting the measurement accuracy and also extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the main structure of a cylindrical differential pressure transmitter and a pipe orifice connection structure proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the exploded structure of a cylindrical differential pressure transmitter and a pipe orifice connection structure proposed by the utility model;

[0020] Figure 3 This is a schematic diagram of a cross-sectional exploded structure of a cylindrical differential pressure transmitter and a pipe orifice connection structure proposed by the utility model;

[0021] Figure 4 The utility model provides a schematic diagram of a side sectional structure of a cylindrical differential pressure transmitter and a pipe orifice connection structure.

[0022] In the figure: 1. Shell; 2. Wire crimping cover; 3. Connecting wire; 4. Nut; 5. Plug; 6. Circuit board; 7. Sensor; 8. Connection port; 9. Anti-blocking head; 10. Connecting pipe; 11. First sealing ring; 12. Second sealing ring; 13. Fixing block; 14. Lower ring; 15. Upper ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] Example 1

[0025] Reference Figure 1-Figure 4 A cylindrical differential pressure transmitter comprises: a housing 1, a plug 5, a circuit board 6 and a sensor 7 are respectively arranged inside the housing 1, the plug 5 and the sensor 7 are both electrically connected to the circuit board 6, one end of the housing 1 is fixedly connected to a pipe port 8, the other end of the pipe port 8 is installed with an anti-blocking head 9, the other end of the housing 1 is fixedly connected to a wire crimping cover 2, one end of the plug 5 is electrically connected to a connecting wire 3, and the connecting wire 3 is located in the wire crimping cover 2;

[0026] A pipe connection structure for connecting a differential pressure transmitter, comprising: a connecting pipe 10, the connecting pipe 10 contacts with a pipe connection port 8, a nut 4 is connected to the connecting pipe 10 for circumferential rotation, a first sealing ring 11 is embedded in one end of the pipe connection port 8, and the nut 4 is threadedly connected to the pipe connection port 8;

[0027] The anti-blocking head 9 is in the shape of a "hat" and is embedded in the pipe port 8;

[0028] In the above technical solution, when connecting the connecting pipe 10, the connecting pipe 10 is aligned with the pipe port 8, and the first sealing ring 11 is installed at one end of the pipe port 8. The nut 4 is rotated in the circle of the connecting pipe 10. The nut 4 is tightened with a wrench, which can drive the connecting pipe 10 to move toward one end of the pipe port 8, and the first sealing ring 11 can be squeezed, so as to facilitate the sealing between the pipe port 8 and the connecting pipe 10, avoid air leakage and water leakage, and improve the measurement accuracy.

[0029] During measurement, the liquid or gas in the connecting tube 10 will impact the anti-blocking head 9. Pure water is filled between the anti-blocking head 9 and the sensor 7. At this time, the impact force of the connecting tube 10 on the anti-blocking head 9 is equal to the impact force of the pure water on the sensor 7. The sensor 7 measures the pressure change, converts it into an electrical signal, and transmits and displays it through the circuit board 6, plug 5 and connecting line 3, which can effectively prevent impurities in the pipeline from affecting the measurement accuracy and also extend the service life.

[0030] Example 2

[0031] refer to Figure 1-Figure 4 , improved on the basis of Example 1:

[0032] The anti-blocking head 9 is made of silicone;

[0033] In the above technical solution, the anti-clogging head 9 made of silicone material has good elasticity, which is convenient for squeezing pure water.

[0034] refer to Figure 1 A lower ring 14 is fixedly connected to the interior of the housing 1, the sensor 7 is located on the upper surface of the lower ring 14, an upper ring 15 is provided on the upper surface of the sensor 7, and the upper ring 15 is threadedly connected to the inner wall of the housing 1;

[0035] In the above technical solution, when assembling the differential pressure transmitter, the sensor 7 is placed on the upper surface of the lower ring 14, and then the upper ring 15 is placed on the upper surface of the sensor 7. The upper ring 15 is threadedly connected to the housing 1 to facilitate fixing the position of the sensor 7.

[0036] refer to Figure 3 , two second sealing rings 12 are installed on the circumference of the sensor 7;

[0037] In the above technical solution, the two second sealing rings 12 on the circumference of the sensor 7 facilitate sealing the sensor 7 to avoid air leakage or water leakage.

[0038] refer to Figure 1 , one end of the housing 1 is fixedly connected with a fixing block 13;

[0039] In the above technical solution, when connecting the connecting pipe 10 , one wrench is placed on the nut 4 and the other is placed on the fixing block 13 , so as to facilitate the connection of the connecting pipe 10 .

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cylindrical differential pressure transmitter, characterized in that: include: A shell (1), wherein a plug (5), a circuit board (6) and a sensor (7) are respectively arranged inside the shell (1), wherein the plug (5) and the sensor (7) are both electrically connected to the circuit board (6), one end of the shell (1) is fixedly connected to a pipe connection port (8), the other end of the pipe connection port (8) is installed with an anti-blocking head (9), the other end of the shell (1) is fixedly connected to a wire crimping cover (2), one end of the plug (5) is electrically connected to a connecting wire (3), and the connecting wire (3) is located inside the wire crimping cover (2).

2. A cylindrical differential pressure transmitter according to claim 1, characterized in that: The anti-blocking head (9) is in the shape of a "hat" and is embedded in the pipe connection port (8).

3. A cylindrical differential pressure transmitter according to claim 1, characterized in that: The anti-blocking head (9) is made of silica gel.

4. A cylindrical differential pressure transmitter according to claim 1, characterized in that: A lower ring (14) is fixedly connected to the interior of the housing (1), the sensor (7) is located on the upper surface of the lower ring (14), an upper ring (15) is provided on the upper surface of the sensor (7), and the upper ring (15) is threadedly connected to the inner wall of the housing (1).

5. The cylindrical differential pressure transmitter according to claim 1, characterized in that: Two second sealing rings (12) are installed on the circumference of the sensor (7).

6. A cylindrical differential pressure transmitter according to claim 1, characterized in that: One end of the housing (1) is fixedly connected to a fixing block (13).

7. A pipe connection structure, characterized in that: A connection for a differential pressure transmitter according to any one of claims 1 to 6, comprising: A connecting pipe (10) is in contact with a pipe connection port (8), the connecting pipe (10) is connected to a nut (4) for circumferential rotation, a first sealing ring (11) is embedded in one end of the pipe connection port (8), and the nut (4) is threadedly connected to the pipe connection port (8).

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