Sample dividing mechanism and automatic water quality sampling equipment

Abstract

The application provides a sample distribution mechanism and an automatic water quality sampling device. The automatic water quality sampling device comprises a water sampling unit, a plurality of sample bottles and the sample distribution mechanism. The sample distribution mechanism comprises a power source and a rotary disc funnel connected to the power source and rotated by the power source. The rotary disc funnel has a bottom disc and a peripheral wall. The bottom disc is arranged obliquely and has a water outlet at the lowest position. The peripheral wall is connected to the outer edge of the bottom disc. The sample bottles are distributed around the rotary shaft of the rotary disc funnel. The water sampling unit is located above the rotary disc funnel. The water in the water sampling unit falls into the rotary disc funnel, flows into the water outlet and is distributed to the sample bottles. The sample distribution mechanism and the automatic water quality sampling device solve the problem that the sample tube in the existing water quality sample distribution mechanism is wound around the rotary shaft and the sample distribution arm when the sample distribution arm rotates.

Description

Technical Field

[0001] This invention relates to the field of water quality sampling technology, specifically to a sampling mechanism and an automatic water quality sampling device. Background Technology

[0002] Automatic water sampling equipment is a crucial component in water quality monitoring systems, enabling automatic sampling, delivery, and retention. In 2020, China's Ministry of Ecology and Environment explicitly mandated the addition of automatic water sampling units—specifically, automatic water sampling equipment—to all online water pollution-free monitoring systems. This equipment enables automatic sampling, water mixing, and delivery to chemical analysis instruments for total phosphorus, total nitrogen, ammonia nitrogen, and COD, as well as the retention of samples exceeding standards. The retention of samples exceeding standards involves automatically storing the water sample into designated retention bottles in a refrigerated compartment. A total of 24 retention bottles are available, and the selection of which bottle to store the sample in is determined by a programmed dispensing mechanism. Currently, the most mature and widely used sampling mechanism is the rocker arm structure. With this sampling arm structure, the sampling arm can only rotate within the range of 0° to 360° for sampling, and there is a slight tube entanglement problem, that is, the sample tube gets wrapped around the rotating shaft. That is, after rotating from sample bottle No. 1 to sample bottle No. 24, it cannot continue to rotate in the same direction, otherwise it will get entangled. Once the program is out of control, the sampling arm will always rotate in the same direction, which will cause the sample motor to burn out or the sample tube to be torn off, affecting the normal operation of the automatic water quality sampling equipment and its entire online monitoring system.

[0003] Therefore, how to solve the above-mentioned problem of sampling tube winding is urgently needed to be studied. Summary of the Invention

[0004] The purpose of this invention is to provide a sampling mechanism and an automatic water quality sampling device to solve the problem of the sample retention tube getting entangled with the rotating shaft and the sampling arm when the sampling arm rotates in the existing water quality sampling mechanism.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A sampling mechanism is provided for an automatic water quality sampling device, the automatic water quality sampling device including a water sampling unit and multiple sample retention bottles, the sampling mechanism comprising:

[0007] Power source;

[0008] A turntable funnel is connected to and rotated by the power source. The turntable funnel has a base and a peripheral wall. The base is inclined and has an outlet at the lowest position. The peripheral wall surrounds and is connected to the outer edge of the base.

[0009] The sample bottles are arranged around the rotation axis of the rotating funnel. The water sampling unit is located above the rotating funnel. Water from the water sampling unit falls into the rotating funnel and flows out of the rotating funnel through the outlet, and is then distributed to each sample bottle.

[0010] In some embodiments of the present invention, the turntable funnel is further provided with a first mounting hole;

[0011] The sample separation mechanism also includes a rotating shaft, one end of which is fixedly connected to the shaft of the power source, and the other end is fixedly connected to the turntable funnel via the first mounting hole.

[0012] In some embodiments of the present invention, the sample dispensing mechanism further includes a flow guide tube;

[0013] One end of the guide tube is connected to the outlet of the rotary funnel, and the other end is connected to the opening of the sample bottle.

[0014] In some embodiments of the present invention, the sample-splitting mechanism further includes an arm;

[0015] One end of the support arm is fixedly connected to the base of the turntable funnel, and the other end extends away from the base and toward the sample bottle, and is fixedly connected to one end of the guide tube that corresponds to the bottle opening of the sample bottle.

[0016] In some embodiments of the present invention, the first mounting hole penetrates the chassis, and a second mounting hole is provided at one end of the support arm that is fixedly connected to the chassis. The second mounting hole is corresponding to the first mounting hole, and the rotating shaft passes through the first mounting hole and the second mounting hole in sequence.

[0017] In some embodiments of the present invention, a mating hole is provided on one end of the rotating shaft that is fixedly connected to the shaft of the power source, the shaft of the power source is inserted into the mating hole, the mating hole is a D-shaped hole, and the cross-section of the shaft of the power source is a D-shaped surface;

[0018] A fixing hole is also provided on one end of the rotating shaft that is fixedly connected to the shaft of the power source. The fixing hole passes through the rotating shaft radially and communicates with the docking hole. A set screw is provided in the fixing hole to fix the rotating shaft and the shaft.

[0019] The power source is a dual-axis output stepper motor;

[0020] A connecting protrusion is provided at the location of the outlet of the turntable funnel. The outlet of the turntable funnel passes through the connecting protrusion, and one end of the guide pipe is sleeved on the outer circumferential surface of the connecting protrusion.

[0021] In some embodiments of the present invention, the orthographic projection of the chassis is circular, and the first mounting hole is located at the center of the chassis.

[0022] In some embodiments of the present invention, the support arm includes a first segment, a second segment, and a third segment connected in sequence, wherein the first segment is close to the chassis, and the third segment is close to the sample bottle;

[0023] The angle between the first segment and the second segment is α, and the angle between the second segment and the third segment is β. α and β are coplanar angles, α∈(90°,180°], β∈(90°,180°], and the angle between the angle bisector of α and the angle bisector of β is greater than 0° and not greater than 90°.

[0024] The middle section of the guide tube is sequentially fitted with the second and third sections.

[0025] In some embodiments of the present invention, a fixing part is provided on the second section of the support arm;

[0026] The fixing part has a through hole, and the guide tube passes through the through hole and is fixed to the support arm;

[0027] A through hole is also provided on the third section of the support arm, and the guide tube passes through the through hole from the side of the support arm near the turntable funnel to the side of the support arm away from the turntable funnel.

[0028] In some embodiments of the present invention, a boss is provided on the side of the base of the rotary funnel away from the water collection unit, and the first mounting hole penetrates the base and the boss.

[0029] The support arm further includes a fourth segment, which is connected to the end of the first segment opposite to the second segment, and the shape and size of the boss are adapted to the shape and size of the fourth segment of the support arm.

[0030] In some embodiments of the present invention, the support arm is provided with reinforcing ribs;

[0031] The reinforcing rib is located on the side of the support arm opposite to the guide pipe and extends longitudinally along the support arm.

[0032] Alternatively, the reinforcing ribs may include two ribs, which are disposed on the side of the support arm near the guide tube and extend along the longitudinal direction of the support arm, with the guide tube sandwiched between the two reinforcing ribs.

[0033] In some embodiments of the present invention, the sample separation mechanism further includes a photoelectric sensing component, the photoelectric sensing component comprising:

[0034] A photoelectric sensor is fixed on the automatic water quality sampling device. The photoelectric sensor has two protrusions, which are arranged opposite each other along the axial direction of the rotating shaft and form a slot.

[0035] A blocking member is fixedly connected to and rotated by one of the rotating shaft and the shaft of the power source, and the extending direction of the blocking member is adapted to the extending direction of the support arm.

[0036] One of the protrusions emits light, which is received by the other protrusion, and the blocking member rotates into the slot and blocks the light.

[0037] To achieve the above objectives, the present invention also provides the following technical solutions:

[0038] An automatic water quality sampling device, the device comprising:

[0039] The aforementioned sample distribution mechanism;

[0040] The water sampling unit is located above the rotary funnel of the sampling mechanism;

[0041] Multiple sample bottles are arranged circumferentially around the rotation axis of the rotating funnel.

[0042] In some embodiments of the present invention, the water sampling unit is provided with a conduit;

[0043] One end of the conduit is connected to the water sampling unit, and the other end is positioned above the rotary funnel.

[0044] The diameter of the conduit is less than or equal to the diameter of the outlet of the rotary funnel.

[0045] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0046] 1. The sampling mechanism and automatic water sampling device provided by the present invention, through a rotatable turntable funnel with an inclined base, not only achieves the "distribution and delivery of samples to multiple sample bottles arranged around the rotation axis of the turntable funnel in the circumferential direction", but also cleverly avoids the problem of the sample tube getting tangled with the rotation axis and the sampling arm when the sampling arm rotates in the traditional sampling mechanism. Moreover, it can achieve a rotation angle greater than 360°, and can achieve the function of "infinitely rotating along the same direction without turning back". It cleverly solves the problem that the sampling arm must turn back once after rotating 360° in the traditional sampling mechanism, thus making the entire sampling mechanism and automatic sampling device more efficient, flexible and reliable.

[0047] 2. The sampling mechanism and automatic water quality sampling device provided by the present invention adopts a support arm with two inclined sections, and the guide tube is attached to the two inclined sections. The design of the two inclined support arms can ensure that there is no water sample residue in the guide tube, and at the same time, it can also ensure that the guide tube will not be pulled or excessively squeezed and deformed when the total height of the support arm in the vertical direction is small, so that the water sample in the guide tube can flow out smoothly without residue.

[0048] 3. In the sampling mechanism and automatic water quality sampling equipment provided by the present invention, a photoelectric sensing component is used to realize the function of accurate positioning and calibration of the support arm and the turntable funnel. Specifically, a blocking component connected to the shaft or rotating shaft of the power source is set. The blocking component can rotate to enter or leave the slot position of the photoelectric sensor, thereby blocking the light signal of the photoelectric sensor. The blocking component will automatically calibrate once every time it passes the photoelectric sensor, thereby realizing the zeroing of the angle error.

[0049] 4. The sampling mechanism and automatic water quality sampling equipment provided by the present invention adopt a power source with a D-shaped surface and a dual-output shaft, a rotating shaft with a D-shaped surface at one end and a D-shaped hole at the other end, and a turntable funnel and support arm with a D-shaped hole. This design makes it easy for the sampling mechanism to maintain high accuracy even after being disassembled and reassembled by the user.

[0050] 5. In the automatic water sampling device provided by the present invention, the diameter of the water outlet pipe of the water sampling unit is less than or equal to the diameter of the outlet of the rotary funnel, thereby realizing that the water inflow into the rotary funnel is less than or equal to the water outflow, thus avoiding the problem of water sample overflowing from the rotary funnel. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 A schematic diagram of the sample-splitting mechanism provided in one embodiment of the present invention;

[0053] Figure 2 for Figure 1 A top view of the rotating funnel in the middle;

[0054] Figure 3 for Figure 2 A cross-sectional view taken along the AA direction;

[0055] Figure 4 for Figure 1 A bottom view of the rotating funnel in the middle;

[0056] Figure 5 for Figure 1 A bottom view of the outrigger;

[0057] Figure 6 for Figure 5 A cross-sectional view taken along the BB direction;

[0058] Figure 7 This is a schematic diagram of the structure of an automatic water quality sampling device provided in one embodiment of the present invention.

[0059] The main reference numerals in the accompanying drawings of this invention are explained as follows:

[0060] 101 - Power Source;

[0061] 102-Rotating funnel; 1021-Base plate; 1022-Peripheral wall; 1023-First mounting hole; 1024-Mating protrusion; 1025-Boss; 1026-Outlet;

[0062] 103 - Shaft;

[0063] 104-Guide tube;

[0064] 105-Outrigger; 1051-Second mounting hole; 1052-First section; 1053-Second section; 1054-Third section; 1055-Fixing part; 10551-Through hole; 1056-Reinforcing rib; 1057-Through hole; 1058-Fourth section;

[0065] 1061-Photoelectric sensor; 10611-Protrusion; 10612-Slot; 1062-Shielding component;

[0066] 201-Water sampling unit; 2011-Conduit; 202-Sample bottle; 203-Refrigerator. Detailed Implementation

[0067] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0068] The present invention provides a sampling mechanism and an automatic water quality sampling device, which are described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of the present invention. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0069] Example 1

[0070] like Figure 1 and Figure 7 As shown in some embodiments of the present invention, a sampling mechanism is used in an automatic water sampling device. The automatic water sampling device includes a water sampling unit 201 and multiple sample bottles 202. The sampling mechanism includes: a power source 101; a turntable funnel 102 connected to and rotated by the power source 101. The turntable funnel 102 has a base 1021 and a peripheral wall 1022. The base 1021 is inclined and has an outlet 1026 at its lowest position. The peripheral wall 1022 is connected to the outer edge of the base 1021. The sample bottles 202 are distributed around the rotation axis of the turntable funnel 102. The water sampling unit 201 is located above the turntable funnel 102. Water from the water sampling unit 201 falls into the turntable funnel 102 and flows into the outlet 1026 and leaves the turntable funnel 102, and is then distributed to the sample bottles 202. It is understood that the sampling mechanism provided by the present invention, through a rotatable turntable funnel 102 with an inclined base, not only achieves the "distribution and delivery of samples to multiple sample bottles 202 arranged around the rotation axis of the turntable funnel in the circumferential direction", but also cleverly avoids the problem of the sample tube getting tangled in the sampling arm when the sampling arm rotates in the traditional sampling mechanism. It can also achieve a rotation angle greater than 360°, and can achieve the function of "infinitely rotating in the same direction without turning back". It cleverly solves the problem that the sampling arm must turn back once after rotating 360° in the traditional sampling mechanism, thus making the entire sampling mechanism and automatic sampling equipment more efficient, flexible and reliable.

[0071] In some embodiments of the present invention, such as Figure 2 and Figure 3 As shown, the turntable funnel 102 is also provided with a first mounting hole 1023; as Figure 1 As shown, the sample separation mechanism also includes a rotating shaft 103. One end of the rotating shaft 103 is fixedly connected to the shaft of the power source 101, and the other end is fixedly connected to the turntable funnel 102 via the first mounting hole 1023.

[0072] like Figure 1 As shown, in some embodiments of the present invention, the sample distribution mechanism further includes a guide tube 104; one end of the guide tube 104 is connected to the outlet 1026 of the turntable funnel 102, and the other end is correspondingly set to the mouth of the sample bottle 202, so as to realize the function of "the turntable funnel 102 rotates, and its outlet 1026 passes above or near the mouth of each sample bottle 202, thereby distributing the water sample in the turntable funnel 102 and falling into each sample bottle 202".

[0073] like Figure 1 , Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the sample dispensing mechanism further includes an arm 105; one end of the arm 105 is fixedly connected to the base 1021 of the turntable funnel 102, and the other end extends away from the base 1021 and toward the sample bottle 202, and is fixedly connected to one end of the guide tube 104 that corresponds to the bottle opening of the sample bottle 202, so that the guide tube 104 faces the bottle opening of the sample bottle 202.

[0074] In some embodiments of the present invention, such as Figures 2 to 4 As shown, the first mounting hole 1023 penetrates the chassis 1021; Figure 5 and Figure 6 As shown, a second mounting hole 1051 is provided at one end of the support arm 105 that is fixedly connected to the chassis 1021. The second mounting hole 1051 is correspondingly provided with the first mounting hole 1023. (Referring to...) Figure 1 The rotating shaft 103 passes sequentially through the first mounting hole 1023 and the second mounting hole 1051. It is understood that the inner walls of the first mounting hole 1023 and the second mounting hole 1051, as well as the outer circumferential surface of the rotating shaft 103, may be provided with threads to achieve a fixing effect through threaded locking. Furthermore, in some embodiments of the present invention, a locking nut may be fitted onto the outer circumferential surface of the rotating shaft 103 to further enhance the locking and fixing effect.

[0075] like Figure 2 and Figure 4 As shown, in some embodiments of the present invention, a mating hole (not shown) is provided on one end of the rotating shaft 103 that is fixedly connected to the shaft of the power source 101. The shaft of the power source 101 is inserted into the mating hole. The mating hole is a D-shaped hole, and the cross-section of the shaft of the power source 101 is a D-shaped surface. A fixing hole (not shown) is also provided on one end of the rotating shaft 103 that is fixedly connected to the shaft of the power source 101. The fixing hole penetrates the rotating shaft 103 radially and communicates with the mating hole. The fixing hole contains a... Set screws are used to secure the rotating shaft 103 and the machine shaft. The cross-section of the part of the rotating shaft 103 that is fixedly connected to the turntable funnel 102 is a D-shaped surface, and the cross-section of the part of the rotating shaft 103 that is fixedly connected to the support arm 105 is a D-shaped surface. The first mounting hole 1023 and the second mounting hole 1051 are both D-shaped holes to achieve a foolproof effect during assembly. Furthermore, when the user disassembles the various parts, it is also convenient for the user to easily reassemble the various parts into one unit. This ensures that the sample sorting mechanism still has high accuracy after being disassembled and reassembled by the user.

[0076] In some embodiments of the present invention, the power source 101 is a dual-axis output stepper motor, which outputs torque to the rotating shaft 103 to realize the rotation of the turntable funnel 102. The specific model and specifications of the stepper motor can be selected and adjusted according to the actual application scenario. In other embodiments of the present invention, other types of motors can also be used to achieve the same output torque effect.

[0077] like Figure 3 As shown, in some embodiments of the present invention, a docking protrusion 1024 is provided at the location of the outlet 1026 of the turntable funnel 102, the outlet 1026 of the turntable funnel 102 passes through the docking protrusion 1024, and one end of the guide pipe 104 is sleeved on the outer peripheral surface of the docking protrusion 1024.

[0078] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, the orthographic projection of the chassis 1021 is circular, and the first mounting hole 1023 is located at the center of the chassis 1021.

[0079] like Figure 6 As shown, in some embodiments of the present invention, the support arm 105 includes a first segment 1052, a second segment 1053, and a third segment 1054 connected in sequence. The first segment 1052 is close to the chassis 1021, and the third segment 1054 is close to the sample bottle 202. The angle between the first segment 1052 and the second segment 1053 is α, and the angle between the second segment 1053 and the third segment 1054 is β. α and β are coplanar angles, α∈(90°,180°], β∈(90°,180°], and the angle between the angle bisectors of α and β is greater than 0° and not greater than 90°. The middle section of the guide tube 104 is sequentially fitted with the second segment 1053 and the third segment 1054 to accommodate and fix the guide tube 104. Furthermore, as... Figure 6 As shown, the above design not only ensures that there is no water sample residue in the guide tube, but also ensures that the guide tube 104 will not be pulled or excessively squeezed and deformed when the total height H of the support arm 105 in the vertical direction is small, so that the water sample in the guide tube 104 can flow out smoothly without residue.

[0080] like Figure 1 and Figure 6As shown, in some embodiments of the present invention, a fixing part 1055 is provided on the second segment 1053 of the support arm 105; the fixing part 1055 has a through hole 10551, and the guide tube 104 passes through the through hole 10551 and is fixed to the support arm 105. It is worth noting that the fixing part 1055 may include multiple parts, arranged sequentially along the extension direction of the support arm 105, to further enhance the fixing effect on the guide tube 104. It is understood that the specific size parameters of the fixing part 1055 can be selected and adjusted according to the actual application situation, and in other embodiments of the present invention, the fixing part 1055 may be provided on the second segment 1053 or other suitable positions of the support arm 105.

[0081] like Figure 6 As shown, in some embodiments of the present invention, a through hole 1057 is also provided on the third section 1054 of the support arm 105. The guide tube 104 passes through the through hole 1057 from the side of the support arm 105 near the turntable funnel 102 to the side of the support arm 105 away from the turntable funnel 102, so as to be opposite to the bottle mouth of the sample bottle 202, thereby achieving the effect of "water sample leaving the turntable funnel 102 via the guide tube 104 and being distributed into each sample bottle 202".

[0082] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, a boss 1025 is provided on the side of the base 1021 of the turntable funnel 102 away from the water collection unit 201, and the first mounting hole 1023 penetrates the base 1021 and the boss 1025; the support arm 105 further includes a fourth section 1058, which is connected to the end of the first section 1052 away from the second section 1053. The shape and size of the boss 1025 are adapted to the shape and size of the fourth section 1058 of the support arm 105. The function of the boss 1025 is to realize the stable assembly between the turntable funnel 102 and the support arm 105.

[0083] like Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the support arm 105 is provided with a reinforcing rib 1056; the reinforcing rib 1056 is provided on the side of the support arm 105 away from the guide pipe 104 and extends along the longitudinal direction of the support arm 105. Obviously, the reinforcing rib 1056 serves to strengthen the structural strength of the support arm 105.

[0084] In other embodiments of the present invention, the reinforcing ribs 1056 include two ribs, which are disposed on the side of the support arm 105 near the guide tube 104 and extend along the longitudinal direction of the support arm 105. The guide tube 104 is sandwiched between the two reinforcing ribs 1056, so as to strengthen the structural strength of the support arm 105 and stabilize the guide tube 104, making the guide tube 104 less prone to problems such as skewing and loosening.

[0085] like Figure 1 As shown, in some embodiments of the present invention, the sampling mechanism further includes a photoelectric sensing component, which includes: a photoelectric sensor 1061 fixedly mounted on the automatic water quality sampling device, the photoelectric sensor having two protrusions 10611, the two protrusions 10611 being arranged opposite each other along the axial direction of the rotating shaft 103 to form a slot 10612; and a blocking member 1062 fixedly connected and rotated by the shaft of the power source 101, the extending direction of the blocking member 1062 being adapted to the extending direction of the support arm 105; wherein, one of the protrusions 10611 emits light and is received by the other protrusion 10611, the blocking member 1062 rotating into the slot 10612, situated between the two protrusions 10611, and blocking the light, so that one protrusion 10611 does not receive light from the other protrusion 10611. During the debugging phase, when the shielding component 1062 first rotates to the position of the slot 10612 of the photoelectric sensor 1061 and interrupts the light signal, the power source 101 stops rotating. At this time, if the support arm 105 is exactly aligned with the middle position of the mouth of the first sample bottle 202, then it can rotate to the middle position of the mouth of the next sample bottle 202 with each rotation of γ angle, where γ = (360°) / N, and N is the number of sample bottles 202 evenly arranged circumferentially; if the support arm 105 is not aligned with the middle position of the mouth of the first sample bottle 202, then the power source 101 is driven to continue rotating by setting parameter compensation. The system rotates, causing the support arm 105 to rotate to the position corresponding to the middle position of the mouth of sample bottle 202 (number 1). Then, it rotates by an angle γ to reach the next sample bottle 202. After rotating to the middle position of the mouth of the last sample bottle, it rotates again from the last sample bottle to sample bottle 1. The support arm, turntable funnel, and shielding component will rotate with the power source to the position of the photoelectric sensor slot. The shielding component interrupts the photoelectric sensor's light signal, causing the power source to pause briefly. Then, according to the set parameters, it rotates again to the middle position of the mouth of sample bottle 1. At this point, the accumulated angle error during this rotation is automatically cleared to zero. That is, the shielding component 1062 automatically calibrates once every time it passes the photoelectric sensor 1061, thereby achieving zero angle error. This eliminates the accumulated angle error after long-term sampling operations, ensuring the sampling accuracy and long-term stable reliability of the sampling equipment. It also ensures that the sampling mechanism retains high sampling accuracy even after disassembly and reassembly by the user.

[0086] refer to Figure 1 and Figure 7 When the support arm 105, the turntable funnel 102, and the shielding member 1062 rotate with the shaft of the power source 101 to a position that corresponds to the slot 10612 of the photoelectric sensor 1061, specifically when the shielding member 1062 rotates into the slot 10612, the light signal of the photoelectric sensor 1061 will change. If at this time the support arm is aligned with the mouth of sample bottle 202 (sample bottle 202 is used as the reference bottle; of course, the reference bottle can also be a sample bottle 202 of other bottle numbers), From the middle position, rotating by an angle γ will rotate to the next sample bottle 202, where γ = (360°) / N, and N is the number of sample bottles 202 evenly arranged circumferentially. If the support arm 105 is not aligned with the middle position of the bottle opening of sample bottle 202, compensation can be achieved by setting parameters in the software. This will ensure that the outlet of the support arm 105 and the guide tube 104 is aligned with the middle position of the bottle opening of sample bottle 202, and then rotating by an angle γ will rotate to the next sample bottle 202. The relative positions of the arm 105 and the shielding member 1062 are fixed, and the position of the photoelectric sensor 1061 is also fixed. When the arm 105, the turntable funnel 102, and the shielding member 1062 rotate with the shaft of the power source 101 to a position that corresponds to the slot 10612 of the photoelectric sensor 1061, that is, when the shielding member 1062 rotates into the slot 10612, it then rotates according to the set compensation parameters to the middle position of the mouth of the No. 1 sample bottle 202. In this way, the power source 101 can rotate. The accumulated angle error during the process is automatically cleared, that is, the angle error is automatically cleared every time it rotates to the No. 1 sample bottle 202. It should be noted that if the support arm 105, the turntable funnel 102, and the shielding part 1062 rotate with the shaft of the power source 101 to the position of the slot 10612 of the photoelectric sensor 1061, and the light signal of the photoelectric sensor 1061 changes, and if the support arm 105 is exactly aligned with the middle position of the bottle mouth of the No. 1 sample bottle 202 at this time, no compensation is required, and the compensation parameter is set to 0.

[0087] Understandably, when the support arm 105, turntable funnel 102, and shielding member 1062 rotate with the shaft of the power source 101 into the slot 10612 of the photoelectric sensor 1061, the light signal of the photoelectric sensor 1061 changes from on to off. If the support arm 105 is aligned with the center of the mouth of sample bottle No. 1 at this time, rotating by an angle γ will rotate it to the next sample bottle number, where γ = 360° / N, and N is the number of sample bottles evenly arranged circumferentially. If the support arm 105 is not aligned with the center of the mouth of sample bottle No. 1, compensation parameters can be set through software parameters to align it with the center of the mouth of sample bottle No. 1. The position is determined by rotating the shield 105 and the shield 1062. The position of the photoelectric sensor 1061 is also fixed. When the support arm 105, the turntable funnel 102, and the shield 1062 rotate with the power source 101 to the slot 10612 of the photoelectric sensor 1061, the angle error accumulated by the power source 101 during its 360° rotation will be automatically cleared to zero. That is, the sample dispensing mechanism provided by the present invention will pass through the photoelectric sensor 1061 once and be calibrated once every time the shield 1062 rotates, and the accumulated angle error will be automatically cleared to zero.

[0088] Example 2

[0089] like Figure 7 As shown, in some embodiments of the present invention, an automatic water sampling device includes: a sampling mechanism as described in Embodiment 1; a water sampling unit 201, which is fixedly connected to a frame (unlabeled) and disposed above the turntable funnel 102 of the sampling mechanism; and a plurality of sample bottles 202, which are distributed around the rotation axis of the turntable funnel 102.

[0090] like Figure 7 As shown, in some embodiments of the present invention, the water sampling unit 201 is provided with a conduit 2011; one end of the conduit 2011 is connected to the water sampling unit 201, and the other end is correspondingly disposed above the rotary funnel 102; it can be understood that through the guiding effect of the conduit 2011, the water sample in the water sampling unit 201 can be guided to the rotary funnel 102, and it can also avoid the problem of "splashing water due to falling from a height" when the water sample in the water sampling unit 201 falls into the rotary funnel 102, thus avoiding water waste and preventing the water sample from wetting or polluting the internal environment of the equipment.

[0091] like Figure 7 As shown, in some embodiments of the present invention, the water sampling unit 201 is fixed outside the frame, and the conduit 2011 extends from outside the frame to the internal space of the frame to supply water samples to the rotary funnel 102.

[0092] In some embodiments of the present invention, the diameter of the conduit 2011 is less than or equal to the diameter of the outlet 1026 of the turntable funnel 102. Its function is to limit the amount of water entering the turntable funnel 102, so that the amount of water entering is less than the amount of water exiting, so as to avoid the problem of "the amount of water entering is greater than the amount of water exiting, resulting in water overflow".

[0093] It is understandable that the diameter of the aforementioned conduit 2011 and the diameter of the outlet 1026 of the rotary funnel 102 can be selected and adjusted according to the actual application scenario.

[0094] In some embodiments of the present invention, the automatic water sampling device further includes a refrigerator 203; such as Figure 7 As shown, in some embodiments of the present invention, the rotary funnel 102, guide tube 104, support arm 105, and sample bottle 202 of the sampling mechanism are housed inside the refrigerator 203 to achieve the refrigeration and preservation effect of the sample. Specifically, the water sampling unit 201 is fixed to the top of the refrigerator 203, and the top of the refrigerator 203 is provided with two through holes, through which the rotating shaft 103 and the conduit 2011 of the sampling mechanism pass respectively.

[0095] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims. Furthermore, specific examples have been used in the specification to illustrate the principles and implementation methods of the present invention. The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention, and the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A sample dividing mechanism for an automatic water quality sampling apparatus, the automatic water quality sampling apparatus comprising a water sampling unit and a plurality of sample bottles, characterized by comprising: The sample distribution mechanism comprises: a power source; a rotary disc funnel connected to and rotated by the power source, the rotary disc funnel having a disc and a peripheral wall, the disc being arranged obliquely and having a water outlet at a lowest position, the peripheral wall being connected to an outer edge of the disc; the rotary disc funnel having a first mounting hole; a rotary shaft, one end of the rotary shaft being fixedly connected to a shaft of the power source, the other end of the rotary shaft being fixedly connected to the rotary disc funnel via the first mounting hole; a flow guide pipe, one end of the flow guide pipe being connected to the water outlet of the rotary disc funnel, the other end of the flow guide pipe having a port corresponding to a bottle mouth of the sample bottle; an arm, one end of the arm being fixedly connected to the disc of the rotary disc funnel, the other end of the arm extending away from the disc and towards the sample bottle, and the other end of the arm being fixedly connected to one end of the flow guide pipe corresponding to the bottle mouth of the sample bottle; wherein the sample bottles are distributed circumferentially around a rotation axis of the rotary disc funnel, the water sampling unit is located above the rotary disc funnel, water in the water sampling unit falls into the rotary disc funnel, flows into the water outlet and leaves the rotary disc funnel, and is then distributed to the sample bottles.

2. The sample distribution mechanism according to claim 1, wherein the first mounting hole penetrates the disc, the arm has a second mounting hole at an end fixedly connected to the disc, the second mounting hole is arranged corresponding to the first mounting hole, and the rotary shaft penetrates the first mounting hole and the second mounting hole in sequence.

3. The sample distribution mechanism according to claim 2, wherein the rotary shaft has a docking hole at an end fixedly connected to the shaft of the power source, the shaft of the power source is inserted into the docking hole, the docking hole is a D-shaped hole, and the shaft of the power source has a D-shaped cross section; the rotary shaft also has a fixing hole at the end fixedly connected to the shaft of the power source, the fixing hole penetrates the rotary shaft along a radial direction of the rotary shaft and communicates with the docking hole, and the fixing hole is provided with a set screw to fix the rotary shaft and the shaft; a cross section of a part of the rotary shaft fixedly connected to the rotary disc funnel is D-shaped, a cross section of a part of the rotary shaft fixedly connected to the arm is D-shaped, and the first mounting hole and the second mounting hole are both D-shaped holes; the power source is a double-shaft output stepper motor; the rotary disc funnel has a docking protrusion at a position where the water outlet is located, the water outlet penetrates the docking protrusion, and one end of the flow guide pipe is sleeved on an outer circumferential surface of the docking protrusion.

4. The sample distribution mechanism according to any one of claims 1 to 3, wherein a normal projection of the disc is circular, and the first mounting hole is located at a center of the disc.

5. The sample distribution mechanism according to claim 2, wherein the arm comprises a first segment, a second segment and a third segment connected in sequence, the first segment is close to the disc, and the third segment is close to the sample bottle. An angle between the first segment and the second segment is α, and an angle between the second segment and the third segment is β, α and β are coplanar angles, α ∈ (90°, 180°], β ∈ (90°, 180°], and an angle between an angle bisector of α and an angle bisector of β is greater than 0° and not greater than 90°; The middle segment of the flow guide pipe is sequentially attached to the second segment and the third segment.

6. The sample splitting mechanism according to claim 5, wherein, A second segment of the arm is provided with a fixing portion; The fixing portion is provided with a through hole, and the flow guide pipe passes through the through hole to be fixed to the arm; A third segment of the arm is further provided with a through hole, and the flow guide pipe passes through the through hole from one side of the arm close to the rotary funnel to the other side of the arm away from the rotary funnel.

7. The sample splitting mechanism according to claim 5, wherein, The bottom plate of the rotary funnel is provided with a boss on the side away from the water sampling unit, and the first mounting hole penetrates the bottom plate and the boss; The arm further comprises a fourth segment, which is connected to one end of the first segment away from the second segment, and the shape and size of the boss are adapted to the shape and size of the fourth segment of the arm.

8. The sample splitting mechanism according to claim 5, wherein, The arm is provided with a reinforcing rib; The reinforcing rib is arranged on the side of the arm away from the flow guide pipe and extends along the longitudinal direction of the arm. Alternatively, the reinforcing rib comprises two reinforcing ribs arranged on the side of the arm close to the flow guide pipe and extending along the longitudinal direction of the arm, and the flow guide pipe is clamped between the two reinforcing ribs.

9. The sample splitting mechanism according to claim 1, wherein, The sample splitting mechanism further comprises a photoelectric sensing assembly, which comprises: A photoelectric sensor fixedly arranged on the water quality automatic sampling device, the photoelectric sensor having two protrusions arranged opposite to each other along the axial direction of the rotating shaft and forming a slot; A shielding member fixedly connected to one of the rotating shaft and the shaft of the power source and rotating with the one, the extending direction of the shielding member being adapted to the extending direction of the arm; One of the protrusions emits light, and the other one receives the light, and the shielding member rotates into the slot and shields the light.

10. A water quality automatic sampling device, comprising: The sample splitting mechanism according to any one of claims 1 to 9; A water sampling unit arranged above the rotary funnel of the sample splitting mechanism; A plurality of sample bottles distributed around the circumferential direction of the rotating shaft of the rotary funnel.

11. The water quality automatic sampling device according to claim 10, wherein, The water sampling unit is provided with a guide pipe; One end of the guide pipe is connected to the water sampling unit, and the other end is arranged above the rotary funnel; The diameter of the guide pipe is less than or equal to the diameter of the water outlet of the rotary funnel. ​

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