Ground tank electrode type liquid level measuring device for measuring waste water

Abstract

An electrode type liquid level measuring device for measuring a waste water trough comprises a junction box, an electrode used for measuring the liquid level is arranged below the junction box, a liquid level meter barrel connected with the junction box is arranged on the outer side of the electrode, a plurality of groups of water inlet holes used for liquid to pass through are formed in the outer wall of the liquid level meter barrel, and the bottom of the liquid level meter barrel is blocked by a flange blocking plate. The liquid level measuring device can effectively overcome various adverse conditions on site, and can be used for measuring the liquid level of a geosyncline which is easy to block media, large in liquid level fluctuation and poor in outdoor or external environment, the operation environment which is poor in isolation through the specially-made stainless steel cylinder body, and bottom sediments, fluctuating liquid level or the outdoor environment with foam on the liquid level are isolated, so that the liquid level of the geosyncline is measured. And frequent distortion of the electrode type liquid level meter caused by a traditional installation mode can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production auxiliary equipment, in particular to an electrode type liquid level measuring device for measuring wastewater floor troughs. Background Art

[0002] In petrochemical production, there are many open-air wastewater tanks that require regular start and stop of wastewater pumps to discharge the collected wastewater to sewage treatment devices. Generally, the electrode level meter is used to output the switch signal to realize the automatic start and stop of the wastewater pump. Due to the influence of the measurement environment and on-site installation conditions, the extensive electrode level meter is susceptible to surface foam, bottom sediment, wastewater splashing, and wet short circuits. The electrode signal is easily distorted, causing the wastewater pump to start and stop frequently or run all the time, resulting in a high failure rate of the wastewater pump, which brings great pressure to the company's equipment maintenance. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide an electrode-type liquid level measuring device for measuring wastewater floor troughs. A special electrode-type liquid level gauge stainless steel measuring tube and a junction box are set on site. The measuring tube has built-in electrodes, which are fixed on the insulating plate in the junction box and are well isolated and moisture-proof. There are three rows of water inlet holes at different positions on the top surface of the measuring tube. The liquid level is measured by using the principle of liquid communicating vessels. It can effectively prevent the entry of splashing liquid, surface foam, and bottom sediment. There is a flange plug at the bottom to facilitate the cleaning work after the sediment enters the measuring tube. This set of liquid level measuring devices can effectively overcome many unfavorable conditions on site, realize reliable and stable operation of liquid level measurement, and realize effective start and stop control of the wastewater pump.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] An electrode-type liquid level measuring device for measuring a wastewater trough comprises a junction box, an electrode for measuring the liquid level is arranged below the junction box, a liquid level meter cylinder connected to the junction box is arranged outside the electrode, a plurality of water inlet holes for liquid to pass through are arranged on the outer wall of the liquid level meter cylinder, and the bottom of the liquid level meter cylinder is blocked by a flange blocking plate.

[0006] An insulating plate is provided at the bottom of the junction box, and the electrode passes through the insulating plate and is connected to the terminal board on the insulating plate. A wire entry hole is provided on one side of the junction box.

[0007] The water inlet holes on the cylinder of the liquid level gauge are arranged in three rows from top to bottom.

[0008] The flange plugging plate is formed by connecting a circular flange plate connected to the cylinder of the liquid level meter and a circular sealing flange plate with the same outer diameter as the circular flange plate, and the two are fixedly connected by fixing bolts on the outside.

[0009] The above-mentioned electrode for measuring the liquid level consists of a high electrode, a low electrode and a common electrode.

[0010] The junction box is made of stainless steel, and the insulating plate is a PTFE insulating plate.

[0011] The utility model provides an electrode-type liquid level measuring device for measuring a wastewater trough, which improves the measurement installation method of the electrode liquid level meter for a wastewater trough in harsh environments such as bottom sediments, liquid surface foam, and open air environments. The foam on the wastewater surface, the bottom sediments, and the humid open air environment are separated by a special stainless steel junction box and a measuring tube, so that the erroneous switch signal outputted under the conductive effect of the sediments, foams, and humid environment in the traditional installation method can be avoided, and the damage of the wastewater pump parts caused by the distortion of the liquid level meter can be avoided; at the same time, the plugging plate at the bottom of the measuring tube can facilitate the cleaning of the sediments in the measuring tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 This is a structural diagram of the wastewater tank liquid level electrode type liquid level measuring device of the utility model;

[0014] Figure 2 It is a top view schematic diagram of the junction box of the utility model.

[0015] In the figure: junction box 1, insulating plate 2, wire entry hole 3, terminal board 4, high electrode 5, low electrode 6, common electrode 7, level meter cylinder 8, flange plug 9, fixing bolt 10. DETAILED DESCRIPTION

[0016] like Figure 1 As shown in the figure, an electrode-type liquid level measuring device for measuring a wastewater floor trough includes a junction box 1, an electrode for measuring the liquid level is provided below the junction box 1, a liquid level meter cylinder 8 connected to the junction box 1 is provided on the outside of the electrode, a plurality of water inlet holes for liquid to pass through are provided on the outer wall of the liquid level meter cylinder 8, and the bottom of the liquid level meter cylinder 8 is blocked by a flange plug 9.

[0017] An insulating plate 2 is provided at the bottom of the junction box 1 . The electrodes pass through the insulating plate 2 and are connected to a terminal board 4 on the insulating plate 2 . A wire entry hole 3 is provided at one side of the junction box 1 .

[0018] The water inlet holes on the above-mentioned liquid level gauge cylinder 8 are arranged in three rows from top to bottom.

[0019] The three rows of water inlet holes correspond to the three water levels of high, medium and low respectively. According to the principle of water connectivity, the water level electrode can detect any water level.

[0020] The flange plug 9 is formed by connecting a circular flange plate connected to the liquid level gauge cylinder 8 and a circular sealing flange plate having the same outer diameter as the circular flange plate, and the two are fixedly connected by fixing bolts 10 on the outside.

[0021] The above-mentioned electrode for measuring the liquid level is composed of a high electrode 5 , a low electrode 6 and a common electrode 7 .

[0022] The junction box 1 is made of stainless steel, and the insulating plate 2 is a PTFE insulating plate.

[0023] Example:

[0024] An improved device for measuring the liquid level of an electrode level meter for measuring the liquid level of a wastewater tank, the device comprises a stainless steel measuring cylinder ⑤, the material of which is a Φ273 stainless steel tube, the length of which is customized according to the liquid level of the wastewater tank, the top of the stainless steel measuring cylinder ⑤ is welded with a stainless steel DN250 flange ⑨, and the plugging plate is connected with a fixing bolt ⑩; there are three rows of Φ20 water inlet holes on the body of the stainless steel measuring cylinder, the first row of water inlet holes is located at the lower electrode of the high-position electrode, the second row of water inlet holes is located in the middle of the cylinder body, and the third row of water inlet holes is located at the lower edge of the common electrode; the junction box ① is a square junction box with a length and width of 350mm, a Φ273 circular hole is opened at the bottom, and is welded to the top of the measuring cylinder ⑤ (using full welding); there is an insulating plate made of PTFE at the bottom of the junction box, with a length and width of 300mm; the insulation board ② and the junction box ① are fixed and pressed with M12 bolts, and the joints between the insulation board and the junction box are waterproofed with expanded PTFE tape; the high, low and common electrodes ⑤⑥⑦ are made of stainless steel, and M20*180 double-headed screws are welded on the top. The high, low and common electrodes ⑤⑥⑦ and the insulation board ② are fixed on the upper and lower sides with double-headed screws, arranged in an equilateral triangle, and coated with waterproof glue; the high, low and common electrodes ⑤⑥⑦ lead wires are 2.5*3 shielded cables, which are tightened with bolts and then soldered to the terminal board; the junction box inlet ③ has a waterproof barrier; the entire measuring device is now manufactured and installed; then the measuring device is moved to the site for installation, fixation and debugging.

[0025] The beneficial effects of the utility model are as follows:

[0026] It can adapt to the wastewater tanks with relatively harsh environments. Generally speaking, the wastewater tanks of petrochemical enterprises have more bottom sediments and more foam on the liquid surface. When the water volume is large, liquid splashing is easy to occur, and it is very easy to be distorted under the influence of moisture or rain in the open air environment. Traditional wastewater tanks generally use electrode level gauges to output switching quantities to start and stop wastewater pumps. However, when there are more sediments at the bottom of the wastewater tank, more foam on the liquid surface, or the electrode is connected by moisture or rain at the terminal, it is easy to be distorted, resulting in the wastewater being drained, causing the wastewater pump to dry-grind, causing damage to parts such as machine seals, impellers, and bearings. The new electrode level gauge can effectively isolate the electrode from the operating environment, and through the principle of liquid communicating vessels, isolate the foam, sediments at the bottom of the wastewater tank, and the humid operating environment, to avoid frequent distortion of the electrode level gauge, thereby avoiding damage to the wastewater pump.

Claims

1. An electrode-type liquid level measuring device for measuring wastewater floor trough, characterized in that: The invention comprises a junction box (1), an electrode for measuring the liquid level is arranged below the junction box (1), a liquid level gauge cylinder (8) connected to the junction box (1) is arranged outside the electrode, a plurality of groups of water inlet holes for liquid to pass through are arranged on the outer wall of the liquid level gauge cylinder (8), and the bottom of the liquid level gauge cylinder (8) is blocked by a flange blocking plate (9).

2. The electrode type liquid level measuring device for measuring wastewater floor trough according to claim 1 is characterized in that: An insulating plate (2) is provided at the bottom of the junction box (1); the electrode passes through the insulating plate (2) and is connected to a terminal board (4) on the insulating plate (2); and a wire entry hole (3) is provided on one side of the junction box (1).

3. The electrode type liquid level measuring device for measuring wastewater floor trough according to claim 2 is characterized in that: The water inlet holes on the liquid level gauge cylinder (8) are arranged in three rows from top to bottom.

4. The electrode type liquid level measuring device for measuring wastewater floor trough according to claim 3 is characterized in that: The flange plug (9) is formed by connecting a circular flange plate connected to the liquid level gauge cylinder (8) and a circular sealing flange plate having the same outer diameter as the circular flange plate, and the two are fixedly connected by external fixing bolts (10).

5. The electrode type liquid level measuring device for measuring wastewater floor trough according to claim 4 is characterized in that: The electrode for measuring the liquid level consists of a high electrode (5), a low electrode (6) and a common electrode (7).

6. The electrode type liquid level measuring device for measuring wastewater floor trough according to claim 5, characterized in that: The junction box (1) is made of stainless steel, and the insulating plate (2) is a PTFE insulating plate.

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