Pretreatment device for measuring BOD5 (Biochemical Oxygen Demand 5) of water quality

Abstract

The utility model discloses a pretreatment device for measuring BOD5 (biochemical oxygen demand 5) of water quality, which comprises a square seat support, an adjusting container, a filter and a measuring container are sequentially arranged on a support rod from top to bottom, a pH adjusting pipe group and a pH adjusting flow valve group which are used for adjusting pH are arranged on the adjusting container, and a plugging module is arranged at the bottom of the adjusting container. A determination reagent tube group and a determination reagent flow valve group are arranged on one side of the determination container, and a liquid level sensor for detecting the liquid level is arranged on the determination container. Hcl and NaOH which are added into liquid are controlled through a pipeline and a valve group, the pH is detected through a pH probe, when the pH is qualified, the adjusting container descends, a rod body in the center of the filtering funnel extends into a hole column, the sealing is damaged, and the liquid flows into the lower part for filtering through a plugging module below, and an acetic acid solution and a potassium iodide solution are automatically injected into the measuring container; and the volume of the finally titrated solution is detected through the liquid level sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of inspection determination, especially a kind of pretreatment device for determining water quality BOD5. BACKGROUND

[0002] Determination water quality BOD5 has important significance.Currently, the determination of BOD5 refers to HJ 505-2009. After water sample collection, first adjust pH value, adjust its pH value to 6~8, take 100ml of neutralized water sample, add 10ml of acetic acid solution and 1ml of potassium iodide solution, mix well, and stand in dark place for 5min. Titrate with sodium sulfite solution. Calculate the volume of sodium sulfite solution consumed in the water sample. The operation involves multiple steps such as pH adjustment, solution addition and titration. It is time-consuming and laborious when the sample size is large. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a pretreatment device for determining water quality BOD5, which can be data-based and convenient during pretreatment of determining water quality BOD5, and can be conveniently operated and calculated by a single person.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A pretreatment device for determining water quality BOD5, comprising a square seat support and a support rod arranged on the square seat support, an adjusting container, a filter and a determination container are arranged on the support rod from top to bottom, a pH adjusting pipe group and a pH adjusting flow valve group for adjusting pH are arranged on the adjusting container, a plugging module is arranged at the bottom of the adjusting container, the plugging module controls the liquid in the adjusting container to remain in the container or flow to the filter below, a determination reagent pipe group and a determination reagent flow valve group are arranged on one side of the determination container, and a liquid level sensor for detecting liquid level is arranged on the determination container.

[0006] The above-mentioned pH adjusting pipe group comprises pipes for adding HCl and NaOH respectively, and the pH adjusting flow valve group comprises valve bodies for controlling the flow of HCl and NaOH respectively;

[0007] The above-mentioned determination reagent pipe group comprises pipes for adding acetic acid solution and potassium iodide solution respectively, and the determination reagent flow valve group comprises valve bodies for controlling the flow of acetic acid solution and potassium iodide solution respectively.

[0008] A stirring motor is arranged on the above-mentioned adjusting container, the shaft of the stirring motor is connected with a stirring support, and a stirring rod is arranged below the stirring support.

[0009] A pH probe is arranged in the above-mentioned adjusting container.

[0010] The support rod is provided with a guide protrusion, and the adjusting container can move up and down along the guide protrusion.

[0011] The plugging module comprises a lower concave conical side wall at the bottom of the adjusting container, a hollow hole column is arranged at the center of the bottom of the lower concave conical side wall, a through hole is arranged at the periphery of the hole column, a sealing plate is arranged above the hole column, a sealing element is fixedly arranged on the inner wall of the lower concave conical side wall, and the sealing plate can be lifted or lowered by a rod body penetrating out of the hole column to realize sealing or non-sealing of the bottom of the container.

[0012] The sealing plate is provided with a boss at the center, and a recess hole is arranged below the boss and corresponds to the hole body of the hole column.

[0013] In the preferred scheme, the recess hole below the boss matches the outer diameter of the hole column, and the sealing plate presents a downward inclined surface outward from the boss.

[0014] The filter comprises a filter funnel, a placing table for placing on a measuring container is arranged outside the filter funnel, a filter paper is arranged in the filter funnel, a positioning spike table is placed on the filter paper, and a dripping spike rod corresponding to the hole column is arranged at the center of the positioning spike table.

[0015] The positioning spike table comprises a positioning conical table, a filter support rod in the shape of a cross is arranged at the center of the positioning conical table, and the dripping spike rod is fixed at the intersection of the cross.

[0016] The pre-treatment device for measuring water quality BOD5 is provided, Hcl and NaOH added liquid are controlled through a pipeline and a valve group, pH is detected through a pH probe, when the pH is qualified, the adjusting container is lowered through the lower plugging module, the rod body at the center of the filter funnel is inserted into the hole column, the sealing is damaged and flows into the lower part for filtering, acetic acid solution and potassium iodide solution are automatically added in the measuring container, and the volume of the finally titrated solution is detected through a liquid level sensor. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described in connection with the drawings and examples:

[0018] Figure 1 It is structure schematic diagram for pre-treatment device for measuring water quality BOD5;

[0019] Figure 2 It is structure schematic diagram for adjusting container;

[0020] Figure 3 It is Figure 2 Partial enlarged schematic view;

[0021] Figure 4 It is preferred structure schematic diagram of plugging module;

[0022] Figure 5for measuring container structure schematic diagram;

[0023] Figure 6 for filter structure schematic diagram;

[0024] Figure 7 for positioning punch platform structure schematic diagram Figure 1 ;

[0025] Figure 8 for positioning punch platform structure schematic diagram Figure 2 .

[0026] In the figure: square seat support 1, support rod 2, adjusting container 3, plugging module 31, lower concave conical side wall 311, hole column 312, leakage hole 313, sealing plate 314, boss 315, sealing element 316, measuring container 4, filter 5, filter funnel 51, placement platform 52, filter paper 53, positioning punch platform 54, positioning conical platform 541, filter support rod 542, stirring motor 6, stirring support 7, stirring rod 8, pH adjusting pipe group 9, pH adjusting flow valve group 10, measuring reagent pipe group 11, measuring reagent flow valve group 12, pH probe 13, guide protrusion 14, liquid level sensor 15, drop flow punch rod 16. DETAILED DESCRIPTION

[0027] Example 1:

[0028] As shown in the Figures 1-8 , a pre-treatment device for measuring water quality BOD5 includes square seat support 1 and support rod 2 arranged on square seat support 1, and support rod 2 is sequentially provided with adjusting container 3, filter 5 and measuring container 4 from top to bottom, adjusting container 3 is provided with pH adjusting pipe group 9 and pH adjusting flow valve group 10 for adjusting pH, adjusting container 3 is provided with plugging module 31 at the bottom, plugging module 31 controls the liquid in adjusting container 3 to remain inside the container or flow to the filter 5 below, measuring container 4 is provided with measuring reagent pipe group 11 and measuring reagent flow valve group 12 on one side, and measuring container 4 is provided with liquid level sensor 15 for detecting liquid level.

[0029] After adjusting the pH in adjusting container 3 to the target interval, the liquid is made to flow into filter 5 by controlling plugging module 31, flows into measuring container 4 after filtering, and then measuring solution is added to measuring container 4 through measuring reagent pipe group 11 and measuring reagent flow valve group 12, and the volume is sensed and controlled through liquid level sensor 15.

[0030] The above-mentioned pH adjusting pipe group 9 includes pipes for adding Hcl and NaOH respectively, and the pH adjusting flow valve group 10 includes valve bodies for controlling the flow of Hcl and NaOH respectively;

[0031] The above-mentioned measuring reagent pipe group 11 includes pipes for adding acetic acid solution and potassium iodide solution, respectively, and the measuring reagent flow valve group 12 includes valve bodies for controlling the flow of acetic acid solution and potassium iodide solution, respectively.

[0032] The flow rate can control the speed of liquid supply, and the volume of the supplied liquid can be calculated.

[0033] The above-mentioned adjusting container 3 is provided with a stirring motor 6, the shaft of the stirring motor 6 is connected with a stirring support 7, and a stirring rod 8 is arranged below the stirring support 7.

[0034] The above-mentioned adjusting container 3 is provided with a pH probe 13, and the pH value is displayed through the pH probe connected with a display screen or a probe with a display.

[0035] The above-mentioned supporting rod 2 is provided with a guide protrusion 14, and the adjusting container 3 can move up and down along the guide protrusion 14.

[0036] The above-mentioned sealing module 31 includes a lower concave conical side wall 311 at the bottom of the adjusting container 3, a hollow hole column 312 is arranged at the center of the bottom of the lower concave conical side wall 311, a through hole 313 is arranged around the hole column 312, a sealing plate 314 is arranged above the hole column 312, and a sealing element 316 is fixedly arranged on the inner wall of the lower concave conical side wall 311. The sealing plate 314 can be lifted or lowered by a rod body penetrating out of the hole column 312 to realize sealing or not sealing of the bottom of the container.

[0037] The above-mentioned sealing plate 314 is provided with a boss 315 at the center, and a recess hole below the boss 315 corresponds to the hole body of the hole column 312.

[0038] In a preferred scheme, the recess hole below the boss 315 matches the outer diameter of the hole column 312, and the sealing plate 314 presents a downward inclined surface outward from the boss 315. The inclined arrangement can make the liquid flow into the lower part completely.

[0039] The adjusting container 3 is aligned with the drop flow poking rod 16 to descend through the guide protrusion 14, the drop flow poking rod 16 is extended out of the hole column 312 to lift the sealing plate 314, and the liquid flows into the lower part for filtration.

[0040] The above-mentioned filter 5 includes a filter funnel 51, a placement table 52 is arranged outside the filter funnel 51 for placing on the measuring container 4, a filter paper 53 is arranged in the filter funnel 51, a positioning poking table 54 is placed on the filter paper 53, and a drop flow poking rod 16 is arranged at the center of the positioning poking table 54 corresponding to the hole column 312.

[0041] The above-mentioned positioning poking table 54 includes a positioning conical table 541, and a filter supporting rod 542 in the shape of a "cross" is arranged at the center of the positioning conical table 541, and the drop flow poking rod 16 is fixed at the intersection of the "cross".

[0042] By the frustum, it matches with the funnel, and then the position can be positioned, so that the position of the dripping spike rod 16 is in the center of the section.

[0043] The liquid level sensor 15 is a non-contact liquid level sensor, which can be attached to the bottom of the container to detect the liquid level, and then calculate the volume.

Claims

1. A pretreatment device for measuring BOD5 of water, characterized by, The utility model provides a square seat support (1) and the support pole (2) of setting on square seat support (1), support pole (2) from top to bottom are equipped with adjusting container (3), filter (5) and determination container (4) in proper order, adjusting container (3) is equipped with pH adjusting pipe group (9) and pH adjusting flow valve group (10) for adjusting pH, adjusting container (3) bottom is equipped with the plugging module (31), and the plugging module (31) is controlledly with liquid in adjusting container (3) keeps in the container inside or flows to the filter (5) below, determination container (4) one side is equipped with determination reagent pipe group (11) and determination reagent flow valve group (12), and determination container (4) is equipped with liquid level sensor (15) for detecting liquid level.

2. The pre-treatment device for determining the BOD5 of water according to claim 1, characterized in that, The pH adjusting pipe group (9) includes pipes for adding HCl and NaOH respectively, and the pH adjusting flow valve group (10) includes valve bodies for controlling the flow of HCl and NaOH respectively. The determination reagent pipe group (11) includes pipes for adding acetic acid solution and potassium iodide solution respectively, and the determination reagent flow valve group (12) includes valve bodies for controlling the flow of acetic acid solution and potassium iodide solution respectively.

3. The pre-treatment device for determining the BOD5 of water according to claim 2, characterized in that, The adjusting container (3) is provided with a stirring motor (6), the shaft of the stirring motor (6) is connected with a stirring support (7), and the stirring support (7) is provided with a stirring rod (8) below.

4. The pre-treatment device for determining the BOD5 of water according to claim 3, characterized in that, The adjusting container (3) is provided with a pH probe (13).

5. The pre-treatment device for determining the BOD5 of water according to claim 4, characterized in that, The support pole (2) is provided with a guide protrusion (14), and the adjusting container (3) can move up and down along the guide protrusion (14).

6. The pre-treatment device for determining the BOD5 of water according to claim 5, characterized in that, The plugging module (31) includes a lower concave conical side wall (311) at the bottom of the adjusting container (3), a hollow hole column (312) is arranged at the center of the bottom of the lower concave conical side wall (311), a plurality of through holes (313) are arranged around the hole column (312), a sealing plate (314) is arranged above the hole column (312), a sealing element (316) is fixedly arranged on the inner wall of the lower concave conical side wall (311), and the sealing plate (314) can be lifted or lowered by a rod body penetrating through the hole column (312) to realize sealing or non-sealing of the bottom of the container.

7. The pre-treatment device for determining the BOD5 of water according to claim 6, characterized in that, The sealing plate (314) is provided with a boss (315) at the center, and a recess is arranged below the boss (315) and corresponds to the hole body of the hole column (312).

8. The pre-treatment device for determining the BOD5 of water according to claim 7, characterized in that, The recess below the boss (315) matches the outer diameter of the hole column (312), and the sealing plate (314) presents a downward inclined surface outward from the boss (315).

9. The pre-treatment device for determining the BOD5 of water according to claim 8, characterized in that, The filter (5) includes a filter funnel (51), the outer side of the filter funnel (51) is provided with a placement table (52) for placing on the determination container (4), the filter funnel (51) is provided with a filter paper (53) inside, a positioning spike table (54) is placed on the filter paper (53), and the center of the positioning spike table (54) is provided with a dripping spike rod (16) corresponding to the hole column (312).

10. The pre-treatment device for determining BOD5 of water according to claim 9, wherein, The positioning spike table (54) includes a positioning conical table (541), the center of the positioning conical table (541) is provided with a filter support rod (542) in the shape of a cross, and the dripping spike rod (16) is fixed at the intersection of the cross.

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