Flow switch and continuous electric regeneration cation exchanger

Abstract

The utility model discloses a flow switch and a continuous electric regeneration cation exchanger, and the flow switch comprises a flow tube made of a nonmetal material, the flow tube comprises a tube main body, the tube main body is internally provided with a water sample inlet, a fluid cavity and a water sample outlet, the fluid cavity extends along the axial direction of the tube main body, the bottom end is communicated with the water sample inlet, and the top end is communicated with the water sample outlet; the proximity metal sensor is fixedly mounted on the outer wall of the pipe main body, and the sensing area of the proximity metal sensor corresponds to the top end area of the fluid cavity; the metal floater is limited in the fluid cavity and can axially move along the fluid cavity, and the metal floater rises to the top end area of the fluid cavity to enter the sensing area when the flow velocity of the water sample reaches or exceeds a preset flow velocity threshold value, and leaves the sensing area when the flow velocity of the water sample is lower than the preset flow velocity threshold value. The flow switch can automatically output an on or off signal according to whether the sampling flow speed is larger than the preset threshold value or not, and therefore the intelligent automatic starting and stopping function of continuous electric regeneration cation exchanger equipment is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a flow switch, especially to a flow switch with switch output signal for continuous electric regeneration cation exchanger and continuous electric regeneration cation exchanger containing the flow switch. BACKGROUND

[0002] Hydrogen conductivity is a key index of power plant water vapor quality supervision and control, which reflects the total amount of impurity anions in water vapor. The traditional cation exchange column has many defects such as unable to accurately reflect water quality in a specific time period, large operation and maintenance workload, and non-environmental friendly resin regeneration when processing water samples for detection.

[0003] In recent years, many power plants at home and abroad have adopted continuous electric regeneration cation exchanger to replace the traditional cation exchange column. However, due to some uncertain conditions such as frequent start and stop of power plant boiler and shutdown leakage in pipeline conveying process, it will cause great harm to the normal operation of continuous electric regeneration cation exchanger, for example, if the sampling flow is too small, it will cause the continuous electric regeneration cation exchanger to idle, thereby causing damage to the equipment, and even causing a major safety accident.

[0004] In order to ensure the safe and efficient operation of the continuous electric regeneration cation exchanger, it is necessary to automatically start and stop the continuous electric regeneration cation exchanger according to the sampling flow size, so a flow switch that can output a switch signal according to the actual sampling flow size is needed to ensure the normal operation of the continuous electric regeneration cation exchanger. UTILITY MODEL CONTENTS

[0005] The application provides a flow switch for continuous electric regeneration cation exchanger, which can automatically output on or off signals according to whether the sampling flow rate is greater than the preset threshold, thereby realizing the intelligent automatic start and stop function of the continuous electric regeneration cation exchanger equipment, and effectively ensuring the safe operation of the continuous electric regeneration cation exchanger.

[0006] A flow switch, comprising:

[0007] A flow pipe made of non-metallic material, comprising a pipe body, the pipe body has a water sample inlet, a fluid cavity and a water sample outlet, the fluid cavity extends along the axial direction of the pipe body, the bottom end communicates with the water sample inlet, and the top end communicates with the water sample outlet;

[0008] A proximity metal inductor is fixedly installed on the outer wall of the pipe body, and the inductive area thereof corresponds to the top end area of the fluid cavity;

[0009] A metal float is limited in the fluid chamber and can move axially along the fluid chamber, the metal float rises to the top area of the fluid chamber into the induction area when the water sample flow rate reaches or exceeds its preset flow rate threshold, and leaves the induction area when the water sample flow rate is lower than its preset flow rate threshold.

[0010] The proximity metal inductor is a position inductor which can generate an induction signal without mechanical direct contact with the metal moving part. When the action distance of the metal object approaching the induction surface of the proximity metal inductor, the induction current signal can be generated without mechanical contact and any pressure, thereby providing control instructions for the integrated circuit controller. The proximity metal inductor itself is a commercially available product and can be purchased.

[0011] The flow switch of the present application is suitable for continuous electric regeneration cation exchanger and can automatically output on or off signals according to whether the sampling flow rate is greater than the preset threshold. When the sampling flow rate reaches or exceeds its preset flow rate threshold, the metal float rises to the top area of the fluid chamber into the induction position of the proximity metal inductor, the proximity metal inductor generates an "on" induction current signal which is transmitted to the integrated circuit controller of the continuous electric regeneration cation exchanger, and the continuous electric regeneration cation exchanger is automatically turned on. When the sampling flow rate is less than the preset flow rate threshold, the float drops out of the induction position of the proximity metal inductor, the proximity metal inductor does not generate an induction current signal which is transmitted to the integrated circuit controller of the continuous electric regeneration cation exchanger, and the continuous electric regeneration cation exchanger is automatically stopped.

[0012] Several optional modes are also provided below, but not as additional limitations to the above overall scheme, but only as further supplements or preferences. Without technical or logical contradictions, each optional mode can be combined with the above overall scheme alone, and can also be combined between multiple optional modes.

[0013] Optionally, the metal float is in the shape of a cylinder and is coaxially arranged with the fluid chamber, and the metal float has an axial through hole. The water sample can pass through the through hole in the middle of the metal float and the gap on the outside, and the float can freely slide up and down in the fluid chamber. The flow rate threshold of the float is calibrated by a standard flow meter, and different specifications and models of the float are provided with different flow rate thresholds.

[0014] Optionally, the outer diameter of the metal float is greater than the inner diameter of the water sample inlet and the water sample outlet connected thereto. The float can only be limited to slide in the fluid chamber.

[0015] Optionally, the flow tube further comprises a tube joint penetrating into the tube body and threadedly matched with the tube body, and the tube joint has an axial through hole coaxial with the fluid chamber, and the axial through hole is the water sample inlet.

[0016] The pipe body and the pipe joint of the bottom are sealed by a screwing mechanism. The pipe body is provided with an internal thread, and the pipe joint is provided with an external thread. The external thread of the pipe joint matches the internal thread of the pipe body, so that the pipe joint of the bottom can be tightly screwed into the pipe body through a rotating action, thereby realizing sealing. The design of the thread ensures the tight fit between the pipe joint and the pipe body, prevents leakage of liquid, and also facilitates the placement of the float into the flow tube.

[0017] Optionally, the main body part of the proximity metal inductor is cylindrical, and the axis thereof is perpendicular to the axis of the pipe body.

[0018] Optionally, the outer wall of the pipe body is provided with a circular groove near the top end of the fluid cavity, for fixedly mounting the proximity metal inductor.

[0019] Optionally, the top end of the circular groove is substantially at the same horizontal plane as the top end of the fluid cavity.

[0020] The application also provides a continuous electric regeneration cation exchanger comprising the flow switch.

[0021] Compared with the prior art, the application has the following beneficial effects:

[0022] The device can automatically output an on or off signal according to whether the sampling flow rate is greater than a preset threshold, thereby realizing the intelligent automatic start-stop function of the continuous electric regeneration cation exchanger device, and effectively ensuring the safe operation of the continuous electric regeneration cation exchanger. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The device structure is shown in the sectional view.

[0024] The figures shown in the drawings are as follows:

[0025] 1, pipe body, 2, water sample inlet, 3, fluid cavity, 4, water sample outlet, 5, pipe joint, 6, circular groove, 7, metal float, 8, proximity metal inductor. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0028] like Figure 1 As shown, a flow switch for a continuous electrically regenerated cation exchanger includes a flow tube, a metal float 7, and a proximity metal sensor 8. The flow tube is made of a non-metallic material and includes a tube body 1. The tube body 1 has a water sample inlet 2, a fluid cavity 3, and a water sample outlet 4. The fluid cavity 3 extends axially along the tube body, with the bottom end of the fluid cavity 3 connected to the water sample inlet 2 and the top end connected to the water sample outlet 4. The proximity metal sensor 8 is fixedly mounted on the outer wall of the tube body 1, and its sensing area is adapted to the top area of ​​the fluid cavity. The metal float 7 is confined in the fluid cavity and can move axially along the fluid cavity.

[0029] When the water sample flow rate reaches or exceeds its preset flow rate threshold, the metal float 7 rises to the top area of ​​the fluid chamber, and at this time enters the sensing area of ​​the proximity metal sensor 8. The proximity metal sensor 8 generates an "on" induced current signal and transmits it to the integrated circuit controller of the continuous electric regeneration cation exchanger, and the continuous electric regeneration cation exchanger starts; when the sampling flow rate is less than the preset flow rate threshold of the float, the metal float 7 drops and leaves the sensing area of ​​the proximity metal sensor 8. The proximity metal sensor 8 does not generate an induced current signal and transmits it to the integrated circuit controller, and the continuous electric regeneration cation exchanger stops.

[0030] In some embodiments, the flow tube comprises a tube body 1 and a pipe joint 5 that penetrates the bottom of the tube body. The bottom of the tube body 1 is provided with an internal thread, and the pipe joint 5 is provided with an external thread. The external thread of the pipe joint 5 matches the internal thread of the tube body 1, so that the bottom pipe joint can be tightly screwed into the tube body through a rotational action, thereby achieving a seal. The diameter of the internally threaded section of the tube body is larger than the diameter of the fluid cavity, facilitating the insertion of a metal float. The pipe joint has an axial through-hole, which constitutes the water sample inlet of the flow tube. The water sample inlet is coaxially aligned with the fluid cavity, and the diameter of the water sample inlet is smaller than the diameter of the fluid cavity, thereby limiting the bottom end of the travel of the metal float. The threaded design ensures a tight fit between the bottom joint and the tube body, preventing liquid leakage, while also facilitating the insertion of the float into the flow tube. In other embodiments, the tube body and the bottom pipe joint can also be sealed using flanges or other methods. The flow tube is connected to the sampling tube via its bottom pipe joint.

[0031] The water sample outlet 4 can be aligned with the flow tube coaxially, or can be bent. Figure 1In the shown embodiment, the water sample outlet is designed in a bending manner, including an axial section and a radial section in communication with each other, the axial section extends coaxially with the fluid cavity, and the radial section penetrates the wall of the pipe body along the radial direction of the pipe body, wherein the pipe diameter of the axial section is smaller than the pipe diameter of the fluid cavity, so as to limit the travel end of the metal float, and the radial section can be provided with internal threads to be connected with the sampling pipe.

[0032] In some embodiments, the metal float 7 is in a cylindrical shape and is coaxially arranged in the fluid cavity, and the metal float has an axial through hole. The water sample can pass through the through hole in the middle of the metal float and the gap outside, and the float can freely slide up and down in the fluid cavity. The flow rate threshold of the float is calibrated by a standard flow meter, and different specifications of the float are provided with different flow rate thresholds. The axial length of the metal float is substantially consistent with the diameter of the sensing surface of the proximity metal sensor.

[0033] The proximity metal sensor 8 is fixed on the outer wall of the pipe body 1 and corresponds to the top region of the fluid cavity 2, and the installation position is substantially such that the metal float does not leave the sensing region of the proximity metal sensor when the metal float rises to the top end of the fluid cavity. In one installation manner, the outer wall of the pipe body 1 is provided with a circular groove 6, the top end of the circular groove is substantially aligned with the top end of the fluid cavity, the circular groove is separated from the fluid cavity by the wall of the pipe body, and the proximity metal sensor 8 is fixed in the circular groove. The main body of the proximity metal sensor 8 is in a cylindrical shape, and the axis thereof is perpendicular to the axis of the pipe body 1. In other embodiments, the circular groove can be omitted, and the proximity metal sensor can be directly installed by a bonding or other fixing manner.

[0034] The flow switch is used for a continuous electric regeneration ion exchanger, and correspondingly, the application also provides a continuous electric regeneration ion exchanger comprising the flow switch.

[0035] In operation, water sample flows from the water sample inlet 2 at the bottom, through the fluid chamber 3 and the metal float 7, and finally out of the water sample outlet 4. In this embodiment, a metal float with a flow rate threshold of 12 L / h is used. When the sampling flow rate reaches or exceeds 12 L / h, the metal float 7 rises into the sensing area of the proximity metal inductor 8, the proximity metal inductor 8 generates an "on" sensing current signal to the integrated circuit controller, and the integrated circuit controller starts the continuous electric regeneration ion exchanger. When the sampling flow rate is less than 12 L / h, the metal float 7 falls out of the sensing position of the proximity metal inductor 8, the proximity metal inductor 8 does not generate a sensing current signal to the integrated circuit controller, and the integrated circuit controller stops the continuous electric regeneration ion exchanger. In this way, the flow switch intelligently and accurately controls the start and stop of the continuous electric regeneration ion exchanger by monitoring the sampling flow rate in real time.

[0036] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A flow switch, characterized in that: include: A non-metallic flow tube comprising a tube body having a water sample inlet, a fluid cavity, and a water sample outlet, wherein the fluid cavity extends axially along the tube body, with a bottom end connected to the water sample inlet and a top end connected to the water sample outlet; a proximity metal sensor fixedly mounted on the outer wall of the tube body and having a sensing area corresponding to the top area of ​​the fluid chamber; A metal float is confined in the fluid cavity and can move axially along the fluid cavity. When the water sample flow rate reaches or exceeds its preset flow rate threshold, the metal float rises to the top area of ​​the fluid cavity and enters the sensing area, and leaves the sensing area when the water sample flow rate is lower than its preset flow rate threshold.

2. The flow switch according to claim 1, characterized in that: The metal float is cylindrical and is coaxially arranged with the fluid cavity. The metal float has an axial through hole.

3. The flow switch according to claim 1, characterized in that: The outer diameter of the metal float is larger than the inner diameter of the water sample inlet and the water sample outlet connected thereto.

4. The flow switch according to claim 1, characterized in that: The flow tube further comprises a pipe joint which penetrates into the pipe body and is threadedly matched with the pipe body. The pipe joint has an axial through hole which is coaxial with the fluid cavity. The axial through hole serves as the water sample inlet.

5. The flow switch according to claim 1, characterized in that: The main body of the proximity metal sensor is cylindrical, and the axis thereof is installed perpendicularly to the axis of the pipe body.

6. The flow switch according to claim 5, characterized in that: A circular groove is provided on the outer wall of the tube body near the top of the fluid cavity for fixing and installing the proximity metal sensor.

7. The flow switch according to claim 6, characterized in that: The top of the circular groove and the top of the fluid cavity are substantially located at the same horizontal plane.

8. A continuous electrically regenerated cation exchanger, characterized in that It comprises the flow switch according to any one of claims 1 to 7.

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