Device for detecting conductivity in PH regulating tank

Abstract

The utility model relates to the technical field of conductivity detection, in particular to a conductivity detection device in a PH regulating reservoir, which comprises a mounting flange, at least two groups of electrodes are arranged in the mounting flange, the electrodes are electrically connected with a conductivity detection control terminal, each electrode comprises a wiring end and a sensing end, and a plurality of groups of annularly arranged barrier strips are arranged on the outer side of each sensing end. The cross sections of the barrier strips are arc-shaped, the multiple groups of barrier strips are arranged at intervals in an end-to-end coincident manner, and a metal pole rod is arranged at the surrounding axis of the multiple groups of barrier strips. In the detection process, the metal pole rod is protected through the barrier strip, so that adhesion of bubbles and dirt is avoided, and meanwhile, contact between the metal pole rod and water flow is not shielded.

Description

TECHNICAL FIELD

[0001] The utility model relates to conductivity detection technical field especially relates to a conductivity detection device in PH adjusting pool. BACKGROUND

[0002] The thermal system of the thermal power plant is mainly composed of steel, and the steam turbine is the core of the thermal system. The superheated steam drives the steam turbine to work, and then the condensate water is treated and recycled. In order to prevent the condensate water from corroding the thermal system, the condensate water is generally treated by adding ammonia to control the pH value of the condensate water and the feed water within a reasonable range. In the process of adjusting the pH value by adding ammonia, the detection of conductivity can be used as an effective monitoring method. With the addition of ammonia, the conductivity of the solution will increase accordingly. By continuously detecting the conductivity, the effect of adding ammonia can be understood in real time, and the pH value can be adjusted to the expected range.

[0003] At present, the pH value of the feed water is mainly controlled by manually adjusting the ammonia metering pump in the actual production process. The pH control has serious nonlinearity, hysteresis and time-varying nature. One of the reasons is that the electrode pollution, bubbles and impurities in the condensate water affect the detection and judgment of the condensate water conductivity, thereby causing the judgment error of the ammonia amount. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problems existing in the above, provides a conductivity detection device in PH adjusting pool, adopts a plurality of groups of annularly arranged blocking strips, and solves the problems of electrode pollution, bubbles and impurities in the condensate water affecting the detection and judgment of the condensate water conductivity.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is: a conductivity detection device in PH adjusting pool, comprising a mounting flange, at least two groups of electrodes are arranged in the mounting flange, the electrodes are electrically connected with a conductivity detection control terminal, the electrodes comprise a wiring end and a sensing end, a plurality of groups of annularly arranged blocking strips are arranged on the outer side of the sensing end, the cross section of the blocking strip is arc-shaped, a plurality of groups of blocking strips are arranged at intervals with the head and tail coinciding with each other, and a metal pole is arranged at the axial center surrounded by the plurality of groups of blocking strips.

[0006] Further optimize the technical scheme, one side of the blocking strip is provided with a plurality of side-by-side arranged pinnate openings, and the blocking strip is a non-metal material.

[0007] Further optimize the technical scheme, the top end of the metal pole is provided with an insulating part, one end of the insulating part away from the metal pole is provided with a threaded part, a screwing clamping part is arranged between the threaded part and the wiring end, and a sealing ring is arranged between the screwing clamping part and the threaded part.

[0008] Further optimize the technical scheme, the electrode is provided with three groups of first electrode, second electrode and third electrode, the first electrode, the second electrode and the third electrode are arranged in a triangular shape in the mounting flange.

[0009] Compared with the prior art, the utility model has the advantages that: 1, the protection of metal pole is realized in the detection process through the setting of the blocking strip, the attachment of bubbles and dirt is avoided, and the contact of the metal pole with the water flow is not shielded; 2, the liquid flow around the metal pole can be disturbed to a certain extent, and the adverse effects caused by the local condensation water flow conductivity fluctuation can be avoided to a certain extent, the stability of conductivity detection and the durability of electrode use are improved; 3, the first electrode, the second electrode and the third electrode are electrically connected with the conductivity detection control terminal through respective wiring ends, one group of electrodes is selected as the excitation electrode in the three groups of electrodes, and the other two groups of electrodes are the receiving electrodes, the excitation electrode generates an excitation signal to generate an electric field in the solution, the conductivity detection of the condensation water in the PH regulating tank is realized, and the use of the three groups of electrodes further improves the anti-interference ability of detection. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is an external structure schematic view of a conductivity detection device in a PH regulating tank.

[0011] Figure 2 It is a side view of a conductivity detection device in a PH regulating tank.

[0012] Figure 3 It is a bottom view of a conductivity detection device in a PH regulating tank.

[0013] Figure 4 It is a mechanism schematic view of an electrode in a conductivity detection device in a PH regulating tank.

[0014] In the figure: 1, first electrode; 10, mounting flange; 11, wiring end; 12, sensing end; 120, metal pole; 13, threaded part; 14, insulating part; 15, screwing clamping part; 16, sealing ring; 2, second electrode; 3, third electrode; 4, blocking strip; 41, pinnate notch. DETAILED DESCRIPTION

[0015] To make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further explained in detail below by referring to the specific implementation mode and the attached drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.

[0016] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like involved in the present application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] In combination Figures 1 to 3 As shown in the figure, a conductivity detection device in a pH regulating tank includes a mounting flange 10, at least two groups of electrodes are arranged in the mounting flange 10, in the embodiment, three groups of electrodes are arranged, which are a first electrode 1, a second electrode 2 and a third electrode 3, the first electrode 1, the second electrode 2 and the third electrode 3 are arranged in a triangular shape in the mounting flange 10, and the three groups of electrodes are electrically connected with a conductivity detection control terminal respectively.

[0018] In combination Figures 1 to 4 As shown in the figure, each electrode includes a wiring end 11 and a sensing end 12, a plurality of groups of annularly arranged blocking strips 4 are arranged on the outer side of the sensing end 12, the cross section of the blocking strip 4 is arc-shaped, the plurality of groups of blocking strips 4 are arranged in a staggered manner with the head and tail coinciding with each other, a plurality of side-by-side arranged feather-shaped openings 41 are arranged on one side of the blocking strip 4, and the blocking strip 4 is a non-metal material.

[0019] In combination Figures 2 to 4 As shown in the figure, a plurality of groups of blocking strips 4 are arranged around the axis, and a metal pole 120 is arranged at the axis. The top end of the metal pole 120 is provided with an insulating part 14, the end of the insulating part 14 away from the metal pole 120 is provided with a threaded part 13, a screw clamping part 15 is arranged between the threaded part 13 and the wiring end 11, and a sealing ring 16 is arranged between the screw clamping part 15 and the threaded part 13.

[0020] In use, in combination Figures 1 to 4As shown, the three groups of electrodes are installed in the PH adjusting tank through the mounting flange 10, the electrodes are connected and fixed with the mounting flange 10 through the threaded part 13, the sealing of the electrodes and the mounting flange 10 is realized through the sealing ring 16, the first electrode 1, the second electrode 2 and the third electrode 3 are electrically connected with the conductivity detection control terminal through the respective wiring end 11, one group of electrodes is selected from the three groups of electrodes as the excitation electrode, the other two groups of electrodes are the receiving electrodes, the excitation electrode generates the excitation signal to generate the electric field in the solution, then the electric signal in the electric field is received by the two groups of receiving electrodes and is conducted to the signal amplification circuit of the conductivity detection control terminal, finally the signal is converted into the digital signal output recognizable by the acquisition system through the amplification processing circuit, the conductivity detection of the condensed water in the PH adjusting tank is realized, and the use of the three groups of electrodes improves the anti-interference ability of the detection.

[0021] The control mode of the utility model is automatically controlled through the controller, the control circuit of the controller can be realized through simple programming of the person skilled in the art, and it belongs to the public knowledge in the art, so the utility model will not explain the control mode and the circuit connection in detail.

Claims

1. A conductivity detection device for a pH adjustment tank, comprising a mounting flange (10), wherein at least two sets of electrodes are provided within the mounting flange (10), and the electrodes are electrically connected to a conductivity detection and control terminal, characterized in that: The electrode includes a terminal (11) and a sensing end (12). The sensing end (12) is provided with multiple sets of ring-shaped baffles (4) on its outer side. The cross-section of the baffles (4) is arc-shaped. The multiple sets of baffles (4) are arranged at intervals with their ends overlapping each other. A metal pole rod (120) is provided at the center of the axis around which the multiple sets of baffles (4) are arranged.

2. The conductivity detection device in a pH adjustment tank according to claim 1, characterized in that: The baffle (4) has multiple feather-shaped notches (41) arranged side by side on one side, and the baffle (4) is made of non-metallic material.

3. The conductivity detection device in a pH adjustment tank according to claim 1, characterized in that: The metal pole (120) has an insulating part (14) at its top end. The insulating part (14) away from the metal pole (120) has a threaded part (13). A tightening clamping part (15) is provided between the threaded part (13) and the terminal (11). A sealing ring (16) is provided between the tightening clamping part (15) and the threaded part (13).

4. A conductivity detection device for a pH adjustment tank according to any one of claims 1 to 3, characterized in that: The electrode is provided with three sets of electrodes: a first electrode (1), a second electrode (2), and a third electrode (3), which are arranged in a triangle in the mounting flange (10).

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