Anti-overpressure pressure transmitter

Abstract

An anti-overpressure pressure transmitter comprises a base body tube, an inner cavity of the base body tube is provided with a detection cavity and a middle cavity from top to bottom, the detection cavity and the middle cavity are connected through a channel, a circuit board is arranged in an inner cavity of the detection cavity, and a core body is arranged at the bottom of the inner cavity of the detection cavity; pressure detection is carried out on high-temperature fluid through the core body and the circuit board, an electronic mode is more efficient, quicker and more accurate, meanwhile, the device equally converts the pressure of the high-temperature fluid into oil pressure to carry out pressure detection, and the overpressure protection tube adopts a spiral structure, so that the pressure can be slowed down in the first time, and then the overpressure protection tube is in contact with the core body; the overpressure protection tube is simple in structure and convenient to operate, prevents the impact pressure of silicone oil from being too large when the silicone oil passes through the overpressure protection tube, reduces damage to the core body, only adopts one circle of spiral, does not affect the test of micro pressure, and guarantees the measurement precision while guaranteeing the service life.

Description

Technical Field

[0001] This utility model relates to the field of pressure detection, and in particular to a pressure transmitter that is protected against overpressure. Background Technology

[0002] A pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission. It can convert the physical pressure parameters of gas, liquid, etc. sensed by the pressure sensing element sensor into standard electrical signals to supply secondary instruments such as indicators, alarms, recorders, and regulators for measurement, indication, and process regulation.

[0003] At present, when pressure transmitters are first tested, the impact force of the fluid can damage the equipment and reduce its service life. At the same time, mechanical pressure switches have insufficient detection accuracy and are prone to failure. Utility Model Content

[0004] The purpose of this invention is to provide a pressure transmitter that is protected against overpressure, so as to solve the problems mentioned in the background art.

[0005] The utility model solves the technical problem by adopting the following technical solutions:

[0006] An overpressure-resistant pressure transmitter includes a base tube. The base tube has a detection chamber and an intermediate chamber arranged from top to bottom within its inner cavity. The detection chamber and the intermediate chamber are connected by a channel. A circuit board is located within the detection chamber. A core is located at the bottom of the detection chamber and is connected to the circuit board. The detection surface of the core contacts one end of the channel. An overpressure protection tube is located within the intermediate chamber. The overpressure protection tube is spiral-shaped and rotates only one turn. The overpressure protection tube is filled with silicone oil. One end of the overpressure protection tube is connected to the channel. A pressure-sensing diaphragm is located at the bottom of the intermediate chamber. A connecting bolt is located at the bottom of the base tube, and the connecting bolt has a pressure-guiding hole through it. The pressure-sensing diaphragm contacts one end of the pressure-guiding hole. A Hirschmann connector is located at the top of the base tube and is connected to the circuit board.

[0007] Preferably, the connecting bolt is connected to the device to be tested.

[0008] Preferably, the Hirschmann connector is connected to an external device via a wire.

[0009] The advantages and positive effects of this utility model are:

[0010] This invention uses a core and circuit board to perform pressure detection on high-temperature fluids. The electronic method is more efficient, faster, and more accurate. At the same time, this device converts the pressure of the high-temperature fluid into the pressure of silicone oil for pressure detection. The overpressure protection tube adopts a spiral structure, which can reduce the pressure immediately before contacting the core. This prevents the hydraulic silicone oil from having excessive impact pressure when passing through the overpressure protection tube, thus reducing damage to the core. Furthermore, the single-turn spiral does not affect the testing of small pressures, ensuring both service life and measurement accuracy. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the overall structure of a pressure transmitter for overpressure protection according to this utility model.

[0013] The markings in the attached diagram are as follows: 10, base tube; 11, detection chamber; 12, intermediate chamber; 13, connecting bolt; 14, pressure guide hole; 15, overpressure protection tube; 16, core; 17, circuit board; 18, channel; 19, Hirschmann connector; 20, pressure-sensing diaphragm. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0015] The following combination Figure 1 This utility model will be described in detail below. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The directions of front, back, left, right, up, and down in the view are consistent. Figure 1 This is a front view of the device of this utility model. Figure 1 The directions shown are consistent with the front-facing, back-facing, left-right, up-down directions of the device.

[0016] The following is a further description of the embodiments of the present invention with reference to the accompanying drawings:

[0017] Please see Figure 1This utility model provides an embodiment of an overpressure-resistant pressure transmitter, comprising a base tube 10. The inner cavity of the base tube 10 has a detection chamber 11 and an intermediate chamber 12 arranged from top to bottom. The detection chamber 11 and the intermediate chamber 12 are connected by a channel 18. A circuit board 17 is disposed within the inner cavity of the detection chamber 11. A core 16 is disposed at the bottom of the inner cavity of the detection chamber 11 and is connected to the circuit board 17. The detection surface of the core 16 contacts one end of the channel 18. Overpressure protection is provided within the inner cavity of the intermediate chamber 12. The overpressure protection tube 15 is spiral-shaped and rotates only one turn. The overpressure protection tube 15 is filled with silicone oil. One end of the overpressure protection tube 15 is connected to the channel 18. A pressure-sensing diaphragm 20 is provided at the bottom of the inner cavity of the intermediate cavity 12. A connecting bolt 13 is provided at the bottom of the base tube 10. The connecting bolt 13 has a pressure guiding hole 14 through it. The pressure-sensing diaphragm 20 is in contact with one end of the pressure guiding hole 14. A Hirschmann connector 19 is provided at the top of the base tube 10. The Hirschmann connector 19 is connected to the circuit board 17.

[0018] In another embodiment, the connecting bolt 13 is connected to the device to be tested.

[0019] In another embodiment, the Hirschmann connector 19 is connected to an external device via a wire.

[0020] In practical implementation, the connecting bolt 13 is connected to the device under test. The high-temperature fluid passes through the pressure guide hole 14 and comes into contact with the pressure-sensing diaphragm 20, impacting the diaphragm 20 with pressure. After sensing the impact pressure, the pressure-sensing diaphragm 20 pushes the silicone oil in the overpressure protection tube 15 through the spiral flow inside the tube and impacts the core 16. The core 16 then detects the pressure of the silicone oil. The circuit board 17 converts the signal into an electrical signal of 4-20 mA and 0-5V, which is then transmitted through the Hirschmann connector 19. When the high-temperature fluid pressure is converted to silicone oil pressure, the spiral structure of the overpressure protection tube 15 can reduce the pressure immediately before it comes into contact with the core 16, preventing the silicone oil from being impacted by excessive pressure when passing through the overpressure protection tube 15 and reducing damage to the core 16. At the same time, only one spiral is used, which does not affect the testing of small pressures, ensuring both service life and measurement accuracy.

[0021] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation methods. Any other implementation methods derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. A pressure transmitter with overpressure protection, comprising a base tube (10), characterized in that: The inner cavity of the base tube (10) is provided with a detection cavity (11) and an intermediate cavity (12) from top to bottom. The detection cavity (11) and the intermediate cavity (12) are connected by a channel (18). A circuit board (17) is provided in the inner cavity of the detection cavity (11). A core (16) is provided at the bottom of the inner cavity of the detection cavity (11). The core (16) is connected to the circuit board (17). The detection surface of the core (16) is in contact with one end of the channel (18). An overpressure protection tube (15) is provided in the inner cavity of the intermediate cavity (12). The overpressure protection tube (15) is provided with... The tube is spiral-shaped and rotates only once. The overpressure protection tube (15) is filled with silicone oil. One end of the overpressure protection tube (15) is connected to the channel (18). The bottom of the inner cavity of the intermediate cavity (12) is provided with a pressure-sensing diaphragm (20). The bottom of the base tube (10) is provided with a connecting bolt (13). The connecting bolt (13) is provided with a pressure guiding hole (14). The pressure-sensing diaphragm (20) is in contact with one end of the pressure guiding hole 14. The top of the base tube (10) is provided with a Hessmann connector (19). The Hessmann connector (19) is connected to the circuit board (17).

2. The pressure transmitter with overpressure protection according to claim 1, characterized in that: The connecting bolt (13) is connected to the device to be tested.

3. The pressure transmitter with overpressure protection according to claim 1, characterized in that: The Hessmann connector (19) is connected to an external device via a wire.

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