Wastewater filtering device for automatic COD (Chemical Oxygen Demand) detector

Abstract

The utility model belongs to the technical field of wastewater filtering, and particularly relates to a wastewater filtering device for an automatic COD (Chemical Oxygen Demand) detector, which comprises a filtering mechanism arranged in the detector, wherein the filtering mechanism is positioned between the wastewater tank and the detection water tank and comprises a first intercepting mechanism and a second intercepting mechanism; wherein the first intercepting mechanism is suitable for pumping waste water in the waste water tank for primary filtration and intercepting impurities of a first specification in the waste water tank; the second interception mechanism is suitable for carrying out secondary filtration on the wastewater subjected to primary filtration, and after impurities of a second specification in the wastewater tank are intercepted, the wastewater is discharged into the detection water tank; by arranging the first intercepting mechanism, to-be-detected wastewater is extracted and filtered, large particles in the wastewater are intercepted, and the filtered wastewater is subjected to secondary filtration through the second intercepting mechanism, so that small particles are intercepted.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater filtration, and in particular relates to a wastewater filtration device for a COD automatic detector. Background Art

[0002] Chemical Oxygen Demand (COD) refers to the amount of oxidant consumed when potassium dichromate is used as an oxidant to treat water samples under strong acid and heating conditions, expressed in mg / L of oxygen. It is an important indicator for comprehensive evaluation of the degree of water pollution, an important water quality parameter for water quality monitoring, and one of the important indicators for the implementation of total emission control in my country. It is also an important and relatively easy-to-obtain parameter for the study of rivers and industrial wastewater and the treatment effect of sewage treatment plants. It reflects the degree of pollution in water by reducing substances, which include organic matter, nitrite, ferrous salt, sulfide, etc. It is very common for water samples to be polluted by organic matter. Organic pollutants are oxidized and decomposed by microorganisms, consuming a large amount of dissolved oxygen in the water, making the water black and smelly, suffocating various aquatic organisms, thereby destroying the balance of the ecosystem and worsening the living environment of humans. Therefore, timely monitoring of the concentration level of COD in water is of great significance for monitoring water quality and controlling pollutant emissions.

[0003] Existing detectors use filters to filter wastewater before testing to prevent particulate impurities in the wastewater from clogging the testing instrument. However, when using a single filter, only some larger particles can be filtered, and smaller particulate impurities such as mud and sand are difficult to intercept. As a result, after working for a long time, impurities will accumulate in the detector, affecting its use.

[0004] Therefore, a wastewater filtering device for a COD automatic detector is designed to solve the technical problem in the prior art that it is difficult to filter smaller impurities using a single filter. Utility Model Content

[0005] The utility model aims to provide a wastewater filtering device for a COD automatic detector to solve the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides a wastewater filtering device for a COD automatic detector, comprising:

[0007] A filtering mechanism is arranged inside the detector; wherein

[0008] The filtering mechanism is located between the waste water tank and the detection water tank, and comprises: a first interception mechanism and a second interception mechanism; wherein

[0009] The first interception mechanism is suitable for extracting wastewater from the wastewater tank for primary filtration, and intercepting impurities of a first specification in the wastewater tank;

[0010] The second interception mechanism is suitable for performing a second filtration on the wastewater after the primary filtration, and after intercepting the impurities of the second specification in the wastewater tank, the wastewater is discharged into the detection water tank.

[0011] Further, the first interception mechanism comprises:

[0012] A filter cartridge and a water inlet pipe and a water outlet pipe connected to the filter cartridge; wherein

[0013] One end of the water inlet pipe is connected to the bottom end of the filter cartridge, and the other end is connected to the waste water tank; and

[0014] One end of the water outlet pipe is connected to the outer wall of the filter cartridge, and the other end is connected to the detection water tank.

[0015] Furthermore, a filter screen is provided inside the filter cartridge;

[0016] The filter screen is located at the bottom end of the filter cartridge to filter the wastewater entering the filter cartridge from the water inlet pipe for the first time and intercept impurities of the first specification; and

[0017] The interior of the filter cartridge is provided with a pumping assembly above the filter screen;

[0018] The pumping assembly is suitable for pumping waste water into the filter cartridge through the water inlet pipe when sliding upward inside the filter cartridge, and discharging the waste water in the filter cartridge into the detection water tank through the water outlet pipe when the pumping assembly moves downward.

[0019] Further, the extraction assembly comprises:

[0020] A cylinder, arranged inside the detector;

[0021] A piston member is located inside the filter cartridge and is slidably connected to the filter cartridge; and

[0022] The hollow connecting rod has threads on its inner wall, one end of which is connected to the output end of the cylinder and the other end of which is connected to the upper end surface of the piston member.

[0023] Further, the second interception mechanism comprises:

[0024] The filter plate is located inside the filter cartridge and is suitable for intercepting impurities of the second specification;

[0025] One end of the screw rod is connected to the upper end surface of the filter plate, and the other end thereof penetrates the piston member and meshes with the inner wall of the hollow connecting rod.

[0026] Furthermore, a connecting plate is provided at the output end of the cylinder;

[0027] The lower end surface of the connecting plate is provided with a motor.

[0028] Furthermore, a driven bevel gear is provided on the hollow connecting rod;

[0029] A driving bevel gear is meshed with one side of the driven bevel gear; and

[0030] The output end of the motor is connected to the driving bevel gear.

[0031] Furthermore, the upper end surface of the driven bevel gear is connected to the lower end surface of the connecting plate through a short rod.

[0032] Furthermore, both the water inlet pipe and the water outlet pipe are provided with a one-way valve.

[0033] The beneficial effect of the utility model is that the utility model is provided with a first interception mechanism to extract and filter the wastewater to be tested, intercepting larger particles in the wastewater, and then starting the second interception mechanism to perform a second filtration on the wastewater after filtering out the larger particles, intercepting smaller particles in the remaining wastewater, and during the two filtration processes, the two filtering mechanisms are cleaned by water flow to prevent the intercepted particles from accumulating in the filtering mechanism for a long time, causing clogging of the filtering mechanism cup and affecting subsequent use.

[0034] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0038] Figure 2 It is a schematic diagram of the overall front cross-sectional structure of the utility model;

[0039] Figure 3 It is a schematic diagram of the cross-sectional structure of the filtering mechanism of the utility model;

[0040] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the filtering mechanism of the utility model.

[0041] In the figure:

[0042] 1. Detector;

[0043] 2. Wastewater tank;

[0044] 3. Test the water tank;

[0045] 4. Filter mechanism; 40. Filter cartridge; 41. Water inlet pipe; 42. Filter screen; 43. Water outlet pipe;

[0046] 5. Pumping assembly; 50. Motor; 51. Driving bevel gear; 52. Driven bevel gear; 53. Hollow connecting rod; 531. Piston; 54. Screw rod; 541. Filter plate; 55. Cylinder; 56. Connecting plate. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] Existing detectors use filters to filter wastewater before testing to prevent particulate impurities in the wastewater from clogging the testing instrument. However, when using a single filter, only some larger particles can be filtered, and smaller particulate impurities such as mud and sand are difficult to intercept. As a result, after working for a long time, impurities will accumulate in the detector, affecting its use.

[0049] To solve the above technical problems, in at least one embodiment, a wastewater filtration device for a COD automatic detector is provided, comprising: a filtration mechanism arranged inside the detector 1; wherein the filtration mechanism is located between the wastewater tank 2 and the detection water tank 3, and comprises: a first interception mechanism and a second interception mechanism; wherein the first interception mechanism is suitable for extracting the wastewater in the wastewater tank 2 for primary filtration, and intercepting particulate impurities of the first specification in the wastewater tank; the second interception mechanism is suitable for secondary filtration of the wastewater after the primary filtration, and after intercepting particulate impurities of the second specification in the wastewater tank, the wastewater is discharged into the detection water tank 3.

[0050] By setting up a first interception mechanism, the wastewater to be tested is extracted and filtered to intercept larger particles in the wastewater, and then the second interception mechanism is started to perform a second filtration on the wastewater after filtering out the larger particles to intercept smaller particles in the remaining wastewater. During the two filtration processes, the two filtering mechanisms are cleaned by water flow to prevent the intercepted particles from accumulating in the filtering mechanism for a long time, causing clogging of the filtering mechanism cup and affecting subsequent use.

[0051] In some embodiments, wastewater is pumped from a water source into the wastewater tank 2 by a pump, and one end of the water inlet pipe 41 is located in the wastewater tank 2, at the bottom of the wastewater tank 2. At this time, the cylinder 55 is started, and its output end drives the connecting plate 56 and the hollow connecting rod 53 connected to the lower end surface of the connecting plate 56 to move upward. At this time, the screw rod 54 is located inside the hollow connecting rod 53, and the piston member 531 is in contact with the filter plate 541. As the hollow connecting rod 53 moves upward, a negative pressure is generated below the filter plate 541 in the filter cartridge 40. At this time, the one-way valve on the water inlet pipe 41 is opened, and the one-way valve on the water outlet pipe 43 is closed. The wastewater in the wastewater tank 2 is pumped into the filter cartridge 40 through the water inlet pipe 41. A filter screen 42 is provided inside the filter cartridge 40 above the water inlet pipe 41 to perform preliminary filtration on the wastewater that passes through the water inlet pipe 41 and enters the filter cartridge 40 to intercept impurities of the first specification.

[0052] In some embodiments, after the waste water in the waste water tank 2 is extracted and filtered for the first time, the motor 50 is started, and its output end drives the active bevel gear 51 to rotate, thereby driving the driven bevel gear 52 meshing with it to rotate, and the driven bevel gear 52 drives the hollow connecting rod 53 fixed at its lower end face to rotate. Since the screw rod 54 is threadedly meshed with the inner wall of the hollow connecting rod 53, as the hollow connecting rod 53 rotates, the screw rod 54 moves downward, driving the filter plate 541 fixed at its lower end face to move downward inside the filter cartridge 40. A sliding strip may be provided on the inner wall of the filter cartridge 40, and a sliding groove may be provided on the filter plate 541 and the piston member 531, thereby rotating the filter plate 541 (the upper end face of the piston member 531 is connected to the bearing of the lower end face of the hollow connecting rod 53). As the filter plate 541 moves downward, the waste water after the first filtration passes through the filter Plate 541, and the impurities of the second specification remaining in the wastewater will be intercepted by the filter plate 541 (the size of the impurities of the second specification is smaller than that of the impurities of the first specification). As the filter plate 541 moves down to below the connection between the outlet pipe 43 and the filter cartridge 40, the cylinder 55 is started again, and its output end drives the connecting plate 56 to move down, and the hollow connecting rod 53 and the piston member 531 are pushed down through the connecting plate 56. At this time, the one-way valve on the water inlet pipe 41 is closed, and the one-way valve on the outlet pipe 43 is opened, and the wastewater filtered twice is discharged into the detector through the outlet pipe 43 for detection, and then the motor is started in the reverse direction to reverse the hollow connecting rod 53 and retract the filter plate 42. The filter plate 42 moves up and down in the filter cartridge 40, and the impurities of the second specification can be filtered while preventing the impurities of the second specification from remaining in the filter holes on the filter plate 541.

[0053] To summarize, by providing a first interception mechanism, the wastewater to be tested is extracted and filtered to intercept larger particles in the wastewater, and then the second interception mechanism is started to perform a secondary filtration on the wastewater after filtering out the larger particles to intercept smaller particles in the remaining wastewater. During the two filtration processes, the two filtering mechanisms are cleaned by water flow to prevent the intercepted particles from accumulating in the filtering mechanism for a long time, causing clogging of the filtering mechanism cup and affecting subsequent use.

[0054] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0055] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A wastewater filtration device for a COD automatic detector, characterized in that: include: A filtering mechanism disposed inside the detector; in The filtering mechanism is located between the waste water tank and the detection water tank, and comprises: a first interception mechanism and a second interception mechanism; wherein The first interception mechanism is suitable for extracting wastewater from the wastewater tank for primary filtration, and intercepting impurities of a first specification in the wastewater tank; The second interception mechanism is suitable for performing a second filtration on the wastewater after the primary filtration, and after intercepting the impurities of the second specification in the wastewater tank, the wastewater is discharged into the detection water tank.

2. The wastewater filtration device according to claim 1, characterized in that: The first interception mechanism comprises: A filter cartridge and a water inlet pipe and a water outlet pipe connected to the filter cartridge; wherein One end of the water inlet pipe is connected to the bottom end of the filter cartridge, and the other end is connected to the waste water tank; and One end of the water outlet pipe is connected to the outer wall of the filter cartridge, and the other end is connected to the detection water tank.

3. The wastewater filtration device according to claim 2, characterized in that: A filter screen is provided inside the filter cartridge; The filter screen is located at the bottom end of the filter cartridge to filter the wastewater entering the filter cartridge from the water inlet pipe for the first time and intercept impurities of the first specification; and The filter cartridge is provided with a pumping assembly above the filter screen; in The pumping assembly is suitable for pumping waste water into the filter cartridge through the water inlet pipe when sliding upward inside the filter cartridge, and discharging the waste water in the filter cartridge into the detection water tank through the water outlet pipe when the pumping assembly moves downward.

4. The wastewater filtration device according to claim 3, characterized in that: The extraction assembly comprises: A cylinder, arranged inside the detector; A piston member is located inside the filter cartridge and is slidably connected to the filter cartridge; and The hollow connecting rod has threads on its inner wall, one end of which is connected to the output end of the cylinder and the other end of which is connected to the upper end surface of the piston member.

5. The wastewater filtration device according to claim 4, characterized in that: The second interception mechanism comprises: The filter plate is located inside the filter cartridge and is suitable for intercepting impurities of the second specification; One end of the screw rod is connected to the upper end surface of the filter plate, and the other end thereof penetrates the piston member and meshes with the inner wall of the hollow connecting rod.

6. The wastewater filtration device according to claim 5, characterized in that: The output end of the cylinder is provided with a connecting plate; The lower end surface of the connecting plate is provided with a motor.

7. The wastewater filtration device according to claim 6, characterized in that: The hollow connecting rod is provided with a driven bevel gear; wherein A driving bevel gear is meshed with one side of the driven bevel gear; and The output end of the motor is connected to the driving bevel gear.

8. The wastewater filtration device according to claim 7, characterized in that: The upper end surface of the driven bevel gear is connected to the lower end surface of the connecting plate through a short rod.

9. The wastewater filtration device according to claim 8, characterized in that: The water inlet pipe and the water outlet pipe are both provided with a one-way valve.

Images