Water quality analyzer and analysis method

Abstract

The present invention discloses a water quality analyzer and an analysis method, wherein the water quality analyzer includes a multi-way valve, a peristaltic pump, a flow meter, a digester and a host computer. The multi-way valve includes a valve body assembly, an upper grinding block, a lower grinding block and a reversing assembly, wherein the valve body assembly forms an internal hollow receiving structure, a predetermined number of water holes are arranged circumferentially around the central axis of the upper grinding block, a common hole is arranged along the central axis of the upper grinding block, and the lower grinding block is provided with a connecting structure. In each working state, the connecting structure can connect the common hole with one of the water holes, the reversing assembly is driven and connected to the lower grinding block, a rotating bearing is provided between the reversing assembly and the valve body assembly, the rotating shaft of the reversing assembly coincides with the central axis of the valve body assembly; an avoidance portion is provided between the rotating shaft and the valve body assembly. The present invention can timely perform position correction of corresponding internal components, so that it can still be used and ensure accuracy even in the case of wear.

Description

Technical Field

[0001] The present invention relates to the technical field of water quality detection and precision instrument analysis, in particular to a water quality analyzer and an analysis method. Background Art

[0002] There are many items for water quality testing and analysis, such as pH value, salinity, ammonia nitrogen content, sulfide cyanide content, dissolved oxygen content, and temperature. The current technological development trend is to analyze multiple test items through an automatic analyzer. After retrieval and experiments by technical personnel, it was found that the patent name is twelve-way valve, and the application number is CN2018219818523. There are many problems in actual use. For example, the twelve-way valve will wear out after long-term use. For example, it was found during production that the assembled twelve-way valve was placed on the test bench for a period of time. When it was not used frequently, its interior was corroded. There are still many problems in the existing design, which will be described one by one later.

[0003] Therefore, new improvements and innovations are needed to solve the problems existing in the existing technologies. Summary of the Invention

[0004] Purpose of the invention: On the one hand, the present application provides a water quality analyzer that can be calibrated when internal wear occurs, so that the multi-way valve can still work accurately even in the presence of wear, and at the same time provides a water quality analysis method.

[0005] Technical solution: A water quality analyzer comprising a multi-way valve, a peristaltic pump, a flow meter, a digester, and a host computer; the host computer is provided with a data analysis module for analyzing the validity of data under different working conditions;

[0006] The multi-way valve comprises:

[0007] The valve body assembly forms an internal hollow receiving structure;

[0008] An upper grinding block is provided with a predetermined number of water holes circumferentially around the central axis of the upper grinding block, and a common hole is provided along the central axis of the upper grinding block;

[0009] The lower grinding block is provided with a communication structure, and in each working state, the communication structure is capable of connecting the common hole with one of the water holes;

[0010] A reversing assembly is connected to the lower grinding block and drives the lower grinding block to rotate a predetermined angle to switch the working state of the lower grinding block so that the common hole is connected to different water holes;

[0011] A rotating bearing is provided between the reversing assembly and the valve body assembly. The rotating shaft of the reversing assembly coincides with the central axis of the valve body assembly. A avoiding portion is provided between the rotating shaft and the valve body assembly.

[0012] Furthermore, the upper grinding block and the lower grinding block are made of different materials and have different hardness, so that during operation, a predetermined deformation occurs between the upper grinding block and the lower grinding block, forming a tight connection on the contact surface.

[0013] Furthermore, the reversing assembly includes:

[0014] The rotor has a fixing groove for mounting the lower grinding block at one end and a through hole for fixing the mounting shaft along the radial direction at the other end, and a correction groove is provided at the center of the end surface;

[0015] The rotating shaft is provided with a clamping slot and is connected to the clamping shaft through the clamping slot; one end of the rotating shaft is provided with a spherical correction portion that cooperates with the correction slot;

[0016] A pressing member is sleeved on the rotating shaft, one end of the pressing member abuts against the outer wall of the rotating shaft, and the other end abuts against the valve body assembly or the rotating bearing;

[0017] The height of the correction part is greater than the depth of the correction groove, and there is a predetermined gap between the clamping shaft and the bottom of the clamping groove. When the lower grinding block and the upper grinding block are tilted, the clamping member causes the rotating shaft to drive the rotor to rotate to one side, thereby tightly connecting the upper grinding block and the lower grinding block.

[0018] Furthermore, the valve body assembly includes:

[0019] An upper valve cover having a mounting groove for mounting an upper grinding block;

[0020] The lower valve body is adapted to the upper valve cover to form a hollow cavity structure; an annular flange is provided in the lower valve body to divide the lower valve body into two relatively independent chambers; wherein, the first chamber adjacent to the upper valve cover is used to accommodate the rotor and the rotating shaft, and the second chamber away from the upper valve cover is used to accommodate the rotating bearing.

[0021] Furthermore, a cover is provided at the end of the second chamber, a shaft hole is provided at the center of the cover, and one end of the rotating shaft extends into the shaft hole; the difference between the diameter of the shaft hole and the outer diameter of the rotating shaft is greater than a predetermined value, so that the rotating shaft maintains a predetermined gap with the cover during operation;

[0022] The side wall of the cover is provided with a non-threaded positioning and locking area, and locking holes are evenly opened along the radial direction of the side wall of the lower valve body. The locking screw passes through the locking hole and abuts against the non-threaded positioning and locking area.

[0023] Furthermore, the shrinkage coefficient k1 of the upper grinding block, the thickness d1 of the upper grinding block, the shrinkage coefficient k2 of the lower grinding block, the thickness d2 of the lower grinding block, and the working distance ∆x of the clamping member satisfy the following relationship: ∆x≥k1·d1+ k2·d2; the gap between the upper and lower grinding blocks caused by temperature changes during operation is compensated by the clamping member.

[0024] Furthermore, the lower grinding block and the annular flange are correspondingly provided with blocks for limiting the rotation angle of the rotor within 360°.

[0025] A water quality analysis method, implemented by a water quality analyzer according to any of the above technical solutions, comprising the following steps:

[0026] Step S1, obtaining detection data of the first working state;

[0027] Step S2: Using the data analysis module, determine whether the current detection data exceeds the threshold value compared with the pre-stored standard data model. If so, proceed to the next step;

[0028] Step S3: Calculate the opening time of the multi-way valve in the first working state, call the pre-configured time coefficient, calculate the duration to be deleted, and delete the detection data of the early period of the first working state; generate the remaining detection data, and use the data analysis module to determine whether there is a difference between the remaining detection data and the standard data model. If so, return to step S2; otherwise, proceed to step S4;

[0029] Step S4: In each subsequent working state, the data of the corresponding time length in the previous working state is deleted and sent to the data storage unit.

[0030] Furthermore, the method further comprises the following steps:

[0031] Step S5: The data analysis module retrieves the detection data under each working state according to a predetermined period, randomly selects data groups of a predetermined length, and compares them one by one with the pre-stored standard data model. If the number of data groups exceeding the threshold is greater than the threshold, it indicates that the multi-way valve is faulty.

[0032] Beneficial effects: 1. In the selection of materials, polytetrafluoroethylene is selected as the manufacturing material of the upper grinding block and the lower grinding block, which reduces the minimum friction coefficient. The present invention also corrects the hardness coefficient of the upper grinding block and the lower grinding block so that they can fit more closely during operation to prevent leakage.

[0033] 2. The present invention provides an avoidance portion between the rotating shaft and the valve body assembly to prevent the rotating shaft from colliding with the valve body assembly.

[0034] 3. The present invention can detect and analyze various water qualities. By quantitatively analyzing the data, it can remove a section of data containing impurities to ensure the accuracy of water quality detection.

[0035] 4. The present invention can detect the inside of the valve body and determine whether it is leaking or has other faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0037] Figure 2 It is an exploded view of the structure of the present invention.

[0038] Figure 3 It is a correction principle diagram of the correction unit of the present invention.

[0039] Figure 4 It is a structural diagram of the avoidance portion of the present invention.

[0040] Figure 5 It is a cross-sectional view of the structure of the present invention.

[0041] Figure 6 It is a water quality detection flow chart of the present invention.

[0042] Figures 1 to 6 The markings are: reversing assembly 1, valve body assembly 2, lower grinding block 3, upper grinding block 4, clamping shaft 5, correction part 6, avoidance part 7, rotor 11, rotating shaft 12, upper valve cover 21, lower valve body 22. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the accompanying drawings. It should be noted that the automatic analyzer primarily comprises a multi-way valve, a peristaltic pump, a flowmeter, a digester, and a host computer. The relevant technologies for automatic analyzers and solenoid valves are described in the applicant's prior patents, such as CN105974148A Universal High-Precision Automatic Analyzer and CN205824197U Improved Solenoid Valve. Therefore, this article does not provide a detailed description of the prior art.

[0044] Example 1, based on the problems mentioned in the background technology, this embodiment mainly describes the structure and details of the multi-way valve, which is used to detect various water qualities, such as Figure 1 and Figure 5As shown, the multi-way valve in this embodiment includes an upper grinding block 4, a lower grinding block 3, a reversing assembly 1 and a valve body assembly 2, wherein the upper grinding block 4 is provided with a preset number of water holes, one of which is used as a common hole. For example, a water hole is provided, one of which is used as a common hole, and then can be connected with the remaining water holes through a connecting structure to achieve water inflow and outflow. The specific arrangement can be that a predetermined number of water holes are provided around the circumference of the central axis of the upper grinding block 4, a common hole is provided along the central axis of the upper grinding block, and a connecting structure is provided on the upper surface of the lower grinding block 3. In each working state, the connecting structure can connect the common hole to the water hole. The common hole is connected to one of the water holes. The lower end of the lower grinding block 3 is used to connect the output end of the reversing component 1. The reversing component 1 drives the lower grinding block 3 to rotate according to a preset sequence, so that the lower grinding block 3 rotates a predetermined angle to switch the working state of the lower grinding block 3, so that the common hole is connected to different water holes. Even if the common hole is connected to at least one water hole, a rotating shaft 12 bearing is provided between the reversing component 1 and the valve body component 2. The rotating shaft 12 is used to install the rotating shaft 12. The rotating shaft 12 of the reversing component 1 coincides with the central axis of the valve body component 2. An avoidance portion 7 is provided between the rotating shaft 12 and the valve body component 2, such as Figure 4 As shown, when the traditional reversing assembly 1 drives the rotating shaft 12 to rotate, due to assembly errors, or the rotating shaft 12 is radially offset relative to the valve body assembly 2, the end of the rotating shaft 12 will generate a tangential force on the valve body assembly 2, which will continuously cause wear. Therefore, in this embodiment, the end of the rotating shaft 12 and the valve body assembly 2 are set in this way.

[0045] In order to prevent leakage, that is, leakage between the upper grinding block 4 and the lower grinding block 3, a valve body assembly 2 is further provided for assembling the upper grinding block 4 and the lower grinding block 3 to form a predetermined engineering structure. For example, the upper grinding block 4 and the lower grinding block 3 are pressed tightly together, and at the same time, the contact surfaces of the upper grinding block 4 and the lower grinding block 3 are smoothed, and materials with a small friction coefficient are selected. When working, the reversing assembly 1 drives the lower grinding block 3 to rotate along a preset path, so that the lower grinding block 3 moves relative to the upper grinding block according to a specified stroke, thereby realizing the switching between the common hole and multiple water holes.

[0046] On the basis of Example 1, when the materials of the two structures are similar, the two structures are easy to partially fuse under pressure. The difference between this embodiment and other products is that the upper grinding block 4 and the upper grinding block 4 are made of different materials, and the hardness of the upper grinding block 4 and the lower grinding block 3 is different. For example, the friction coefficient of the polytetrafluoroethylene material is small. In this embodiment, the upper grinding block 4 and the upper grinding block 4 use different types of polytetrafluoroethylene materials. When the two different types of polytetrafluoroethylene rotate, the friction resistance is small. At the same time, during work, a predetermined deformation occurs between the upper grinding block 4 and the lower grinding block 3, forming a tight connection on the contact surface.

[0047] Furthermore, the upper grinding block 4, the upper grinding block 4 and the valve body assembly 2 are also made of different materials, and the valve body assembly 2 is preferably made of a rigid material with high hardness.

[0048] On the basis of Examples 1 and 2, since the present application adopts the rotation between the upper grinding block 4 and the lower grinding block 3 to realize the valve changing function, therefore, after a long period of use, the upper grinding block 4 and the lower grinding block 3 will produce surface-to-surface wear, resulting in the center lines of the upper grinding block 4 and the lower grinding block 3 not being in a straight line. At the same time, due to the different hardness of the upper grinding block 4 and the lower grinding block 3, in order to make the upper grinding block 4 and the lower grinding block 3 always fit closely to prevent leakage, this embodiment provides an improved reversing assembly 1, including a rotor 11 and a rotating shaft 12, such as Figure 3 As shown, one end of the rotor 11 is provided with a fixing groove for installing the lower grinding block 3, and the other end is provided with a through hole for fixing the card shaft 5 in the radial direction. At the same time, a correction groove is provided at the center of the end face. One end of the rotating shaft 12 is provided with a card groove and is connected to the card shaft 5 through the card groove. One end of the rotating shaft 12, that is, the middle position of the card groove is provided with a spherical correction part 6 that cooperates with the correction groove. A clamping piece is sleeved on the rotating shaft, one end of the clamping piece abuts against the outer wall of the rotating shaft 12, and the other end abuts against the valve body assembly 2 or the rotating shaft 12. At the same time, the height of the correction part 6 is greater than the depth of the correction groove. There is a predetermined gap between the card shaft 5 and the bottom of the card groove. When the lower grinding block 3 and the upper grinding block 4 rub for a long time and produce plane wear, the gap tilts, and the clamping piece provides an axial force to the rotating shaft 12, so that the rotating shaft drives the rotor 11 to rotate to one side, thereby making the upper grinding block 4 and the lower grinding block 3 tightly connected, that is, realizing the function of an approximate universal joint.

[0049] Therefore, in this embodiment, when the aforementioned wear occurs, it is only necessary to apply axial force to the rotor 11, so that the upper grinding block 4 and the lower grinding block 3 can be tightly fitted together, thereby extending the service life of the multi-way valve.

[0050] In order to enable the upper grinding block 4, the lower grinding block, the reversing assembly 1, etc. to be precisely assembled, this embodiment provides a valve body assembly 2 adapted thereto, comprising an upper valve cover 21 and a lower valve body 22, wherein the upper valve cover 21 has a mounting groove for mounting the upper grinding block 4, the upper valve cover 21 is adapted to the lower valve body 22, and is combined into a hollow cavity structure, an annular flange is provided in the lower valve body 22, which divides the lower valve body 22 into two relatively independent chambers, namely the first chamber and the second chamber from top to bottom, wherein the first chamber is close to the upper valve cover 21, and is used to accommodate the rotor 11 and the rotating shaft 12, and the second chamber is used to accommodate the rotating bearing.

[0051] When the mechanical drive rotates the rotating shaft 12, due to assembly errors, the rotating shaft 12 is prone to radial deviation after being driven for a period of time, thereby causing damage to the valve body. In this embodiment, a cover is provided at the end of the second chamber. A rotating shaft hole is defined in the center of the cover. One end of the rotating shaft 12 extends into the rotating shaft hole. The difference between the diameter of the rotating shaft hole and the outer diameter of the rotating shaft 12 is greater than a predetermined value, so that the rotating shaft 12 maintains a predetermined gap with the cover during operation. The side wall of the cover is provided with a non-threaded positioning and locking area. Locking holes are uniformly defined along the radial direction of the side wall of the lower valve body 22. The locking screw passes through the locking hole and abuts the non-threaded positioning and locking area. Through the above technical solution, the rotating shaft 12 maintains a predetermined gap with the cover during operation. When the rotating shaft 12 is driven to rotate, local deviation occurs, and no tangential force is generated on the cover.

[0052] The contraction coefficient k1 of upper grinding block 4, the thickness d1 of upper grinding block 4, the contraction coefficient k2 of lower grinding block 3, the thickness d2 of lower grinding block 3, and the working distance ∆x of the clamping member satisfy the following relationship: ∆x ≥ k1 • d1 + k2 • d2. During operation, the gap between the upper and lower grinding blocks 4 and 3 caused by temperature changes is compensated by the clamping member. This technical solution allows quantitative calculation of the wear of the upper and lower grinding blocks 4 and 3.

[0053] Since the present invention is preferably driven mechanically, as an independent unit, determining the position of the air chamber or reference position during valve switching of the multi-way valve is extremely important. Therefore, in this embodiment, the lower grinding block 3 and the annular flange are correspondingly provided with blocks that limit the rotation angle of the rotor 11 to within 360°. For example, a first block is installed on the annular flange, and a second block is provided at the bottom of the lower grinding block 3. When the lower grinding block 3 is driven to rotate, the second block rotates to form a block with the first block. Within the range formed by the lower valve body 22, the rotation range of the second block is one circle. Therefore, in actual use, the relative position inside the multi-way valve can be determined by rotating the lower grinding block 3 to the blocking position.

[0054] Based on the above technology, this embodiment provides a water quality analyzer, including a multi-way valve, a peristaltic pump, a flow meter, a digester and a host computer. The host computer is provided with a data analysis module for analyzing the validity of data under different working conditions.

[0055] Unlike traditional water quality detection, when a common twelve-way valve is used for water quality detection, for example, when two water qualities are detected successively, some residual water quality from the previous detection will affect the water quality detection of the next detection. Therefore, this embodiment proposes a water quality analysis method for quickly detecting multiple water qualities and eliminating error coefficients in a timely manner. Figure 6 As shown, the steps of this embodiment include the following parts:

[0056] Step S1, obtaining detection data of the first working state;

[0057] Step S2: Using the data analysis module, determine whether the current detection data exceeds a threshold value compared with a pre-stored standard data model. If so, proceed to the next step. In this embodiment, the threshold value can be set based on the difference between the current detection data and the pre-stored standard data model, or can be set within an interval based on the standard data model.

[0058] Step S3: Calculate the opening time of the multi-way valve in the first working state, call the pre-configured time coefficient, calculate the duration to be deleted, and delete the detection data of the early period of the first working state; generate the remaining detection data, and use the data analysis module to determine whether there is a difference between the remaining detection data and the standard data model. If so, return to step S2; otherwise, proceed to step S4;

[0059] Step S4: In each subsequent working state, the data of the corresponding time length in the previous working state is deleted and sent to the data storage unit.

[0060] After long-term use, the internal components of the multi-way valve become loose, resulting in loose parts and leaks. For example, during water quality testing, some large particles enter the multi-way valve, causing blockage or getting stuck somewhere, leading to leakage and other problems. Therefore, in this embodiment, the following steps are used to test the effectiveness of the multi-way valve and issue an early warning.

[0061] Step S5: The data analysis module retrieves the detection data under each working state according to a predetermined period, randomly selects data groups of a predetermined length, and compares them one by one with the pre-stored standard data model. If the number of data groups exceeding the threshold is greater than the threshold, it indicates that the multi-way valve is faulty.

[0062] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A water quality analyzer, characterized in that: include: Multi-way valve, peristaltic pump, flow meter, digester and host computer; The host computer is provided with a data analysis module for analyzing the validity of data under different working states; The multi-way valve comprises: The valve body assembly forms an internal hollow receiving structure; An upper grinding block is provided with a predetermined number of water holes circumferentially around the central axis of the upper grinding block, and a common hole is provided along the central axis of the upper grinding block; The lower grinding block is provided with a communication structure, and in each working state, the communication structure is capable of connecting the common hole with one of the water holes; A reversing assembly is connected to the lower grinding block and drives the lower grinding block to rotate a predetermined angle to switch the working state of the lower grinding block so that the common hole is connected to different water holes; A rotating bearing is provided between the reversing assembly and the valve body assembly, and the rotating shaft of the reversing assembly coincides with the central axis of the valve body assembly; an avoidance portion is provided between the rotating shaft and the valve body assembly; The reversing assembly comprises: The rotor has a fixing groove at one end for mounting the lower grinding block, a through hole for fixing the mounting shaft along the radial direction at the other end, and a correction groove at the center of the end surface; The rotating shaft is provided with a clamping slot and is connected to the clamping shaft through the clamping slot; one end of the rotating shaft is provided with a spherical correction portion that cooperates with the correction slot; A pressing member is sleeved on the rotating shaft, one end of the pressing member abuts against the outer wall of the rotating shaft, and the other end abuts against the valve body assembly or the rotating bearing; The height of the correction portion is greater than the depth of the correction groove, and there is a predetermined gap between the clamping shaft and the bottom of the clamping groove. When the gap between the lower grinding block and the upper grinding block is tilted, the pressing member causes the rotating shaft to drive the rotor to rotate to one side, thereby tightly connecting the upper grinding block and the lower grinding block. The upper grinding block and the lower grinding block are made of different materials and have different hardness, so that during operation, a predetermined deformation occurs between the upper grinding block and the lower grinding block, forming a tight connection on the contact surface.

2. The water quality analyzer according to claim 1, wherein The valve body assembly comprises: An upper valve cover having a mounting groove for mounting an upper grinding block; The lower valve body is adapted to the upper valve cover to form a hollow cavity structure; an annular flange is provided in the lower valve body to divide the lower valve body into two relatively independent chambers; wherein, the first chamber adjacent to the upper valve cover is used to accommodate the rotor and the rotating shaft, and the second chamber away from the upper valve cover is used to accommodate the rotating bearing.

3. The water quality analyzer according to claim 2, wherein: A cover is provided at the end of the second chamber, a shaft hole is provided at the center of the cover, and one end of the rotating shaft extends into the shaft hole; the difference between the diameter of the shaft hole and the outer diameter of the rotating shaft is greater than a predetermined value, so that the rotating shaft maintains a predetermined gap with the cover during operation; The side wall of the cover is provided with a non-threaded positioning and locking area, and locking holes are evenly opened along the radial direction of the side wall of the lower valve body. The locking screw passes through the locking hole and abuts against the non-threaded positioning and locking area.

4. The water quality analyzer according to claim 1, wherein The shrinkage coefficient k1 of the upper grinding block, the thickness d1 of the upper grinding block, the shrinkage coefficient k2 of the lower grinding block, the thickness d2 of the lower grinding block, and the working distance Δx of the clamping member satisfy the following relationship: Δx≥k1·d1+ k2·d2; the gap between the upper and lower grinding blocks caused by temperature changes during operation is compensated by the clamping member.

5. The water quality analyzer according to claim 2, wherein: Stoppers are correspondingly provided on the lower grinding block and the annular flange to limit the rotation angle of the rotor to within 360°.

6. A water quality analysis method, characterized in that: The water quality analyzer according to any one of claims 1 to 5 is implemented, and the method comprises the following steps: Step S1, obtaining detection data of the first working state; Step S2: Using the data analysis module, determine whether the current detection data exceeds the threshold value compared with the pre-stored standard data model. If so, proceed to the next step; Step S3: Calculate the opening time of the multi-way valve in the first working state, call the pre-configured time coefficient, calculate the duration to be deleted, and delete the detection data of the early period of the first working state; generate the remaining detection data, and use the data analysis module to determine whether there is a difference between the remaining detection data and the standard data model. If so, return to step S2; otherwise, proceed to step S4; Step S4: In each subsequent working state, the data of the corresponding time length in the previous working state is deleted and sent to the data storage unit.

7. The water quality analysis method according to claim 6, wherein: The following steps are also included: Step S5: The data analysis module retrieves the detection data under each working state according to a predetermined period, randomly selects data groups of a predetermined length, and compares them one by one with the pre-stored standard data model. If the number of data groups exceeding the threshold is greater than the threshold, it indicates that the multi-way valve is faulty.

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