CN211013342U - Dirt removing device for diaphragm type pressure transmitter - Google Patents

Abstract

The utility model relates to a diaphragm type pressure transmitter dirt removing device, including ore pulp delivery trunk line, changer and changer isolating diaphragm, its characterized in that still includes tee bend electromagnetism valves, sample pipeline, water washing system, blowdown dirt system and with the pressure measurement branch pipe of sample pipeline intercommunication, tee bend electromagnetism valves's A end be connected with ore pulp delivery trunk line, the B end is connected with blowdown dirt system, the C end is connected with sample pipeline, water washing system sets up on the sample pipeline right side, the slope of pressure measurement branch pipe sets up the left side at sample pipeline. When the transmitter isolation diaphragm needs to be descaled, the three-way electromagnetic valve set is firstly adjusted to a bypass, the state of the three-way electromagnetic valve set is an A end disconnection state, a B end and a C end are opened, a water flushing system flushing nozzle is opened to flush the transmitter isolation diaphragm, an opening and closing valve on the flushing nozzle is closed after the flushing is clean, the three-way electromagnetic valve set is switched to the normal working state of the A end and the B end opening, and the C end opening and closing are performed.

Description

Dirt removing device for diaphragm type pressure transmitter

Technical Field

The utility model belongs to the technical field of industrial diaphragm type pressure transmitter, especially, relate to a diaphragm type pressure transmitter dirt removing device.

Background

The diaphragm type pressure transmitter is the most common sensor in industrial practice, is widely applied to various industrial automatic control environments, and relates to mine ore dressing, petrochemical industry, water conservancy and hydropower and other industries, and almost covers all processes. The diaphragm type pressure transmitter is developed from a common pressure transmitter, and is characterized in that a medium is transmitted to a central diaphragm through a remote transmission diaphragm, so that the measurement medium is prevented from directly contacting with an isolation diaphragm of the transmitter, and a reliable measurement method is provided. Therefore, the diaphragm type pressure transmitter is widely applied to measuring the pressure of an ore pulp conveying pipeline, in the prior art, an isolation diaphragm is usually directly installed on an ore pulp pipeline through a flange, the diaphragm type pressure transmitter needs to measure the pressure of the pipeline under the conditions that the viscosity of a medium is high, scaling is easy to occur or oil stains are contained, and due to the fact that the contact piece area of a remote transmission diaphragm is large, particularly, the diaphragm type pressure transmitter easily deposits, suspends and scales on the remote transmission diaphragm in a viscous or pulpous medium, corrosive liquid or medium rich in particles, if the diaphragm type pressure transmitter is used for a long time, the measurement precision is influenced, the process index is seriously influenced, and even an instrument.

Disclosure of Invention

The utility model aims at providing a can improve diaphragm formula pressure transmitter's measurement accuracy, prolong its life's diaphragm formula pressure transmitter dirt removing device.

The purpose of the utility model is realized just like this.

The utility model discloses a diaphragm type pressure transmitter dirt removing device, including ore pulp conveying main pipe, changer and changer isolating diaphragm, its characterized in that still includes tee bend electromagnetism valves, sample tube, water washing system, blowdown dirt system and the pressure measurement branch pipe that communicates with sample tube, tee bend electromagnetism valves's A end be connected with ore pulp conveying main pipe, B end is connected with blowdown dirt system, C end is connected with sample tube, is equipped with the ascending water inlet of opening in one side of sample tube, water washing system include with sample tube intercommunication inlet tube, flange, the raceway that is connected with the water source, the bath nozzle and set up the on-off valve on the bath nozzle, the inlet tube slope set up on sample tube's right side wall, bath nozzle one end inserts in the inlet tube, and through flange and inlet tube fixed connection, the other end is connected with a water delivery pipe;

the pressure measuring branch pipe is obliquely arranged on the left side of the sampling pipeline and on the upper part of the water inlet pipe, the transmitter is arranged on the pressure measuring branch pipe through a measuring flange, and the transmitter isolation diaphragm is arranged on the measuring flange;

the dirt discharging system consists of a dirt discharging pipe connected with the end C of the three-way electromagnetic valve group and a slurry pump arranged on the dirt discharging pipe.

The inclination angle of the water inlet pipe is the same as that of the pressure measurement branch pipe.

The utility model has the advantages that:

because the water washing system and the dirt discharging system are arranged on the sampling pipeline, sediment suspension and scaling on the remote transmission diaphragm can be timely washed away, the measurement precision of the diaphragm type pressure transmitter is effectively improved, and the service life of the diaphragm type pressure transmitter is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in figure 1, the utility model relates to a diaphragm type pressure transmitter dirt removing device, which comprises a main pulp conveying pipeline 1, a transmitter 2 and a transmitter isolating diaphragm 6, and is characterized in that the device also comprises a three-way electromagnetic valve group 5, a sampling pipeline 7, a water washing system, a dirt discharging system and a pressure measuring branch pipe 4 communicated with the sampling pipeline, wherein the A end of the three-way electromagnetic valve group 5 is connected with the main pulp conveying pipeline 1, the B end is connected with the dirt discharging system, the C end is connected with the sampling pipeline 7, one side of the sampling pipeline 7 is provided with a water inlet with an upward opening, the water washing system comprises a water inlet pipe 8 communicated with the sampling pipeline 7, a connecting flange, a water pipe 10 connected with a water source, a flushing nozzle 9 and an open-close valve arranged on the flushing nozzle 9, the water inlet pipe 8 is obliquely arranged on the right side wall of the sampling pipeline 7, one end of the flushing, and is fixedly connected with the water inlet pipe 8 through a connecting flange, and the other end is connected with the water delivery pipe 10;

the pressure measuring branch pipe 4 is obliquely arranged on the left side of the sampling pipeline 7 and on the upper part of the water inlet pipe 8, the transmitter 2 is arranged on the pressure measuring branch pipe 4 through the measuring flange 3, and the transmitter isolation diaphragm 6 is arranged on the measuring flange 3; the inclination angle of the water inlet pipe 8 is the same as that of the pressure measuring branch pipe 4 and is 35-45 degrees. This enables water from the flush nozzle 10 to flush directly onto the transmitter isolation diaphragm in the pressure measurement manifold 4.

The dirt discharging system consists of a dirt discharging pipe 12 connected with the end C of the three-way electromagnetic valve group and a slurry pump 11 arranged on the dirt discharging pipe 12.

The utility model discloses a diaphragm type pressure transmitter 2 adopts the product sold on the market, is that the device theory of operation who is used for measuring pressure is through filling liquid conduction for the filling liquid at center on the teletransmission diaphragm of high-low pressure side, and the filling liquid at center transmits pressure to the diaphragm at sensor center on. The sensor diaphragm is a tense elastic element, and the displacement of the sensor diaphragm is in direct proportion to the pressure along with the change of the pressure difference, and then the displacement is linearly converted into a 4-20mA current output signal through a capacitance fixed stage amplification circuit.

The utility model discloses a working process: when the transmitter isolation diaphragm 6 needs to be descaled, the three-way electromagnetic valve group 5 is firstly adjusted to a bypass, at the moment, the state of the three-way electromagnetic valve group 5 is that the A end is disconnected, the B end and the C end 3 are opened, a slurry pump is started, mesons in a sampling pipeline can be discharged after the slurry pump works, preparation is made for cleaning the transmitter isolation diaphragm, and then an on-off valve on a flushing nozzle 9 is opened, the inclination angle of a water inlet pipe 8 of the utility model is the same as that of a pressure measurement branch pipe and is 45 degrees, the nozzle generates about 2-3 kilograms of water pressure, at the moment, clear water sprayed by the same inclined plane of the nozzle and the transmitter isolation diaphragm can be directly sprayed to the surface of the transmitter isolation diaphragm 6 for cleaning dirt, when the discharge of the slurry pump is observed to be gradually clear, the dirt on-off valve on the flushing nozzle is closed, and finally, switching the three-way electromagnetic valve group to a normal working state that the end A and the end B are opened and the end C is closed.

Claims (2)

1. The utility model provides a diaphragm type pressure transmitter dirt removing device, includes ore pulp delivery trunk line, changer and changer isolating diaphragm, its characterized in that still includes tee bend electromagnetism valves, sample tube way, water washing system, blowdown dirt system and the pressure measurement branch pipe that communicates with sample tube way, tee bend electromagnetism valves's A end be connected with ore pulp delivery trunk line, the B end is connected with blowdown dirt system, the C end is connected with sample tube way, is equipped with the ascending water inlet of opening in one side of sample tube way, water washing system include inlet tube, flange, the raceway of being connected with the water source that communicates with sample tube way, the bath nozzle and the open and close valve that sets up on the bath nozzle, the inlet tube slope set up on sample tube way's right side wall, in the bath nozzle one end inserts the inlet tube, and through flange and inlet tube fixed connection, the other end is connected with a water delivery pipe;

the pressure measuring branch pipe is obliquely arranged on the left side of the sampling pipeline and on the upper part of the water inlet pipe, the transmitter is arranged on the pressure measuring branch pipe through a measuring flange, and the transmitter isolation diaphragm is arranged on the measuring flange;

the dirt discharging system consists of a dirt discharging pipe connected with the end C of the three-way electromagnetic valve group and a slurry pump arranged on the dirt discharging pipe.

2. The diaphragm pressure transmitter fouling removing device of claim 1, wherein the inclination angle of the water inlet pipe is the same as the inclination angle of the pressure measuring branch pipe.

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