Centrifugal machine for testing water quality

Abstract

The utility model discloses a centrifugal machine for water quality testing. The centrifugal machine comprises a machine body and a rotor. The rotor is rotatably mounted in the machine body, a plurality of storage cavities are formed in the side part of the rotor in the circumferential direction, and the storage cavities are used in pairs; in addition, the device further comprises a plurality of counterweight assemblies and a plurality of adjusting pieces. The counterweight assemblies are slidably installed in the radial direction of the rotor and correspond to the containing cavities respectively. The adjusting pieces are installed on the counterweight assemblies and suitable for driving the counterweight assemblies to slide so that the storage cavities used in pairs can keep dynamic balance. The centrifugal machine has the beneficial effects that the balancing weight in the balancing weight assembly can be driven to move through the adjusting piece, then the rotating torque of the storage cavities in the symmetrical positions is consistent so that balancing of the centrifugal machine can be achieved, and in addition, the limiting plates are elastically installed in the storage cavities so that the centrifugal machine can adapt to centrifugal tubes of different specifications and sizes.

Description

Technical Field

[0001] The present application relates to the technical field of centrifuges, and in particular to a centrifuge for water quality testing. Background Art

[0002] Water, as the source of life, is a necessary condition for the life activities of animals and plants. In recent years, with the continuous deepening of the concept of water management, a variety of water quality inspection indicators and methods have been born. At present, the most common method is the chemical determination method, which generally judges the water quality by measuring the content of chemical substances in the water. At this time, it is necessary to use a centrifuge to separate and measure the various substances in the water.

[0003] The most tedious task in operating a centrifuge is balancing. Traditional balancing methods generally involve repeatedly pipetting test liquid to make the weight of the two centrifuge tubes consistent. Since this is a manual operation, excessive test liquid often needs to be added, requiring multiple balancing steps, which increases the operator's time cost. At the same time, reagents, burettes, and centrifuge tubes are also required in the water quality testing process. If these tools are placed separately, they can easily be lost or damaged. Therefore, there is an urgent need for a centrifuge that can be easily balanced and integrated with water quality testing tools. Utility Model Content

[0004] One of the objects of the present application is to provide a centrifuge for water quality testing that can solve at least one of the defects in the above-mentioned background technology.

[0005] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a centrifuge for water quality testing, comprising a body and a rotor; the rotor is rotatably installed inside the body, and the side of the rotor is provided with multiple storage cavities along the circumferential direction, and the storage cavities are used in pairs; it also includes multiple counterweight assemblies and multiple adjustment members; the counterweight assemblies are slidably installed along the radial direction of the rotor and correspond to each of the storage cavities respectively; the adjustment members are installed on each of the counterweight assemblies, and the adjustment members are suitable for driving the counterweight assemblies to slide so that the storage cavities used in pairs maintain dynamic balance.

[0006] Preferably, the counterweight assembly includes a sliding rod, a counterweight block and a movable plate, the counterweight block is slidably mounted on the sliding rod, and the movable plate is fixedly mounted on the counterweight block, the adjusting member includes an adjusting rod and a limit block, the adjusting rod is slidably mounted inside the limit block, a gear is provided under the adjusting rod, and a tooth plate is provided on the movable plate, and the adjusting member is pulled up and rotated to make the gear and the tooth plate mesh and drive the counterweight block to move radially; a latching tooth is provided on the limit block, and the adjusting member is pressed down to drive the limit block to drive the latching tooth and the tooth plate to engage and lock.

[0007] Preferably, a telescopic rod is connected to the side of the limit block, the telescopic rod is "L"-shaped, the other end of the telescopic rod is slidably installed inside the sliding rod, and the telescopic rod is suitable for cooperating with the adjusting member to move up and down.

[0008] Preferably, a connecting rod is connected to one side of the storage chamber, and the storage chamber is rotatably arranged on the side of the rotor through the connecting rod; a placement chamber is arranged inside the connecting rod, and the adjustment member and the counterweight assembly are both installed in the placement chamber.

[0009] Preferably, a through hole is provided on the upper portion of the connecting rod, and the through hole is suitable for inserting the adjusting rod. A limit plate is provided in the middle portion of the adjusting rod, and the limit plate is suitable for limiting the relative distance between the adjusting rod and the limit block.

[0010] Preferably, a support rod is installed on the telescopic rod, and a support groove is provided at the lower part of the placement cavity. The support rod is slidably installed in the support groove, and the support groove is suitable for cooperating with the telescopic rod to provide support for the adjusting member.

[0011] Preferably, at least one limiting plate is elastically installed inside the storage cavity, and the limiting plate is suitable for limiting the centrifuge tube. The limiting plate is suitable for cooperating with the storage cavity to adapt to centrifuge tubes of different specifications.

[0012] Preferably, the limiting plate is in the shape of an elongated strip, and the contact surface between the limiting plate and the centrifuge tube is a curved surface.

[0013] Preferably, a sensor is connected under each storage cavity, and the sensor is suitable for measuring the weight of the storage cavity. A screen is provided on the body, and the sensor is connected to the screen through an electrical signal, and the screen is suitable for displaying the measurement results of the sensor.

[0014] Preferably, a rotating shaft is provided at the lower end of the rotor, and the rotating shaft is suitable for providing power to the rotor; a box is connected to the outside of the body, and the box is suitable for placing the body, and a storage tank is provided in the box.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] A counterweight assembly and an adjusting piece are installed inside the rotor. The adjusting piece and the counterweight assembly are engaged with gears. By rotating the adjusting piece, the counterweight block in the counterweight assembly can be moved to the left and right sides, thereby changing the weight ratio of the storage cavity in the symmetrical position. A sensor is connected to the bottom of the storage cavity to test the weight. When the weights of the two symmetrically placed storage cavities are the same, it is a balanced state. At this time, pressing down the adjusting piece can engage the limit block with the movable plate to fix the counterweight block.

[0017] A limit plate is elastically installed in the storage chamber. When the centrifuge tube is placed in the storage chamber, the limit plate applies pressure to the centrifuge tube to clamp the centrifuge tube, preventing the centrifuge tube from escaping during the centrifugation process. At the same time, the installation of the limit plate also allows the storage chamber to adapt to centrifuge tubes of different specifications and sizes, increasing the adaptability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of one of the embodiments of the present application.

[0019] Figure 2 for Figure 1 Schematic diagram of the specific structure of the middle rotor.

[0020] Figure 3 for Figure 2 Schematic diagram of the cross-section structure.

[0021] Figure 4 for Figure 3 A local enlarged schematic diagram of point A in the middle.

[0022] Figure 5 This is a schematic diagram of the installation structure of the adjustment part and counterweight assembly in the application.

[0023] Figure 6 for Figure 5 Schematic diagram of the local enlarged structure at point B in the middle.

[0024] In the figure: rotor 1, sensor 11, rotating shaft 12, gear 100, tooth plate 101, latch 102, adjusting member 2, adjusting rod 21, limit block 22, telescopic rod 23, limit plate 24, support rod 25, counterweight assembly 3, counterweight block 31, sliding rod 32, movable plate 33, connecting rod 4, placement cavity 41, through hole 42, support groove 43, storage cavity 5, limit plate 51, body 6, screen 61, box 7, storage slot 71. DETAILED DESCRIPTION

[0025] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0026] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0028] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0029] One of the preferred embodiments of this application is Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, a centrifuge for water quality testing includes a rotor 1, an adjusting member 2, a counterweight assembly 3 and a body 6. The rotor 1 is rotatably mounted inside the body 6. A plurality of storage cavities 5 are provided on the side of the rotor 1 along the circumferential direction. The storage cavities 5 are used in pairs. The counterweight assemblies 3 are slidably mounted along the radial direction of the rotor 1 and correspond to each storage cavity 5 respectively. The adjusting member 2 is installed on each counterweight assembly 3. The counterweight assembly 3 can be adjusted by rotating the adjusting member 2 to maintain the rotational torque between the paired storage cavities 5 within a certain error range to achieve the conditions required for centrifugation.

[0030] In this embodiment, if Figure 5As shown, the counterweight assembly 3 includes a counterweight 31, a slide rod 32 and a movable plate 33. The counterweight 31 is slidably mounted on the slide rod 32, and the movable plate 33 is fixedly mounted on the side of the counterweight 31. The adjusting member 2 includes an adjusting rod 21 and a limit block 22. The adjusting rod 21 is slidably mounted inside the limit block 22. A gear 100 is provided below the adjusting rod 21, and a tooth plate 101 is provided on the movable plate 33. Pulling up the adjusting member 2 puts the counterweight assembly 3 into an adjustment state. Rotating the adjusting member 2 causes the gear 100 and the tooth plate 101 to rotate and engage, driving the movable plate 33 to drive the counterweight 31 to move radially, thereby changing the weight ratio between the storage chambers 5. The limit block 22 is provided with a latching tooth 102. When the adjustment of the counterweight assembly 3 is completed, pressing down the adjusting member 2 can drive the limit block 22 downward and cause the latching tooth 102 to engage with the tooth plate 101, thereby fixing the relative position of the counterweight 31. The specific specifications and meshing principles of the gears are well known to those skilled in the art and will not be elaborated on in detail here.

[0031] It should be noted that traditional centrifuges used for water quality testing often need to be balanced by sucking liquid and weighing it on a scale. During the balancing process, it is impossible to accurately judge the amount of liquid sucked in. If too much liquid is sucked in, multiple suckings are required to achieve balancing, which makes the operation complicated and also increases the risk of contamination of the measured liquid.

[0032] In this embodiment, if Figure 4 and Figure 5 As shown, by rotating the adjustment rod 21, the gear 100 rotates and engages the toothed plate 101, driving the counterweight 31 for balancing. Because the counterweight 31 is installed in the rotor 1, when the weight ratios of the storage chambers 5 at symmetrical positions are different, there is no need to adjust the liquid in the centrifuge tube; balancing can be achieved by simply rotating the adjustment rod 21. In addition, because the tooth pitch of the gear 100 and the toothed plate 101 is uniformly set, the weight ratio between the storage chambers 5 can be uniformly changed during balancing, making it easier to determine the balancing point.

[0033] It should be noted that in order to ensure that the adjustment rod 21 can simultaneously drive the limit block 22 to move when it moves downward, a limit plate 24 should be provided in the middle of the adjustment rod 21. The shape of the limit plate 24 can be circular or polygonal, and the size of the limit plate 24 should be larger than the hole of the limit block 22.

[0034] It can be understood that in order to ensure that the lateral position of the adjusting rod 21 and the limit block 22 does not shift, a telescopic rod 23 is installed on the side of the limit block 22. The telescopic rod 23 is "L"-shaped, and one end of the telescopic rod 23 is fixedly connected to the limit block 22, and the other end of the telescopic rod 23 is slidably installed inside the sliding rod 32.

[0035] In this embodiment, if Figure 2 and Figure 3 As shown, a connecting rod 4 is fixedly connected to the storage chamber 5, and the storage chamber 5 is rotatably arranged on the side of the rotor 1 through the connecting rod 4. A placement chamber 41 is opened inside the connecting rod 4, and the adjustment member 2 and the counterweight assembly 3 are installed in the placement chamber 41.

[0036] It should be known that the upper part of the adjusting rod 21 should protrude to the outside of the connecting rod 4 for easy manual operation. Therefore, a through hole 42 is provided at the upper end of the connecting rod 4. The width of the through hole 42 should be greater than the width of the adjusting rod 21. There are no special requirements for the shapes of the through hole 42 and the adjusting rod 21, but it is necessary to ensure that the rotation of the adjusting rod 21 is not interfered with by the shape of the through hole 42.

[0037] In this embodiment, if Figure 4 and Figure 6 As shown, a vertical downward support rod 25 is provided on the telescopic rod 23, and the support rod 25 cooperates with the telescopic rod 23 to support the support assembly. A support groove 43 is provided at the lower part of the placement cavity 41, and the support rod 25 is slidably installed inside the support groove 43.

[0038] In this embodiment, if Figure 2 and Figure 4 As shown, there are three pairs of storage chambers 5, and a limit plate 51 is elastically installed inside the storage chamber 5. When the centrifuge tube is inserted into the storage chamber 5, the spring is compressed under pressure to move the limit plate 51 backward to ensure that the storage chamber 5 can adapt to centrifuge tubes of different specifications and sizes.

[0039] It is understood that to ensure centrifugal stability, the number of limiting plates 51 in a single receiving cavity 5 is at least one, and the number and weight of limiting plates 51 in each receiving cavity 5 are consistent. The contact surface between the limiting plate 51 and the centrifuge tube should be arc-shaped to better fit and clamp the centrifuge tube.

[0040] In this embodiment, if Figure 3 As shown, a rotating shaft 12 is provided at the lower end of the rotor 1 , and the rotating shaft 12 can provide rotational force for the rotor 1 .

[0041] It should be noted that the weight ratio of the storage cavity 5 must be constantly monitored during weight balancing. Therefore, a sensor 11 is connected below each storage cavity 5 to measure the weight of the storage cavity 5. A screen 61 is provided on the body 6. The sensor 11 and the screen 61 are electrically connected, so that the measurement results of the sensor 11 are displayed on the screen 61. The specific specifications and principles of the sensor are well known to those skilled in the art and will not be elaborated on here.

[0042] In this embodiment, if Figure 1As shown, a box body 7 is connected to the outside of the body 6. Placing the body 6 in the box body 7 can effectively prevent the centrifuge from being damaged. In addition, a plurality of storage slots 71 are provided inside the box body 7. Commonly used tools such as reagents, burettes, centrifuge tubes and power cords can be placed in the storage slots 71 for integrated storage.

[0043] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A centrifuge for water quality testing, comprising a body and a rotor; the rotor is rotatably mounted inside the body, and a plurality of storage cavities are provided on the side of the rotor along the circumferential direction, the storage cavities being used in pairs; characterized in that: The rotor further comprises a plurality of counterweight assemblies and a plurality of adjusting members; the counterweight assemblies are slidably mounted along the radial direction of the rotor and correspond to the respective receiving cavities; the adjusting members are mounted on the respective counterweight assemblies, and are adapted to drive the counterweight assemblies to slide so as to maintain dynamic balance of the paired receiving cavities; At least one limiting plate is elastically installed inside the storage cavity, and the limiting plate is suitable for limiting the centrifuge tube. The limiting plate is suitable for cooperating with the storage cavity to adapt to centrifuge tubes of different specifications; The limiting plate is in the shape of an elongated strip, and the contact surface between the limiting plate and the centrifuge tube is a curved surface; A sensor is connected under each storage cavity, and the sensor is suitable for measuring the weight of the storage cavity. A screen is provided on the body, and the sensor is connected to the screen through an electrical signal, and the screen is suitable for displaying the measurement results of the sensor.

2. The centrifuge for water quality testing according to claim 1, wherein: The counterweight assembly includes a sliding rod, a counterweight block and a movable plate, the counterweight block is slidably mounted on the sliding rod, and the movable plate is fixedly mounted on the counterweight block, the adjusting member includes an adjusting rod and a limit block, the adjusting rod is slidably mounted inside the limit block, a gear is provided under the adjusting rod, and a tooth plate is provided on the movable plate. The adjusting member is pulled up and rotated to make the gear and the tooth plate mesh and drive the counterweight block to move radially; a latching tooth is provided on the limit block, and the adjusting member is pressed down to drive the limit block to drive the latching tooth and the tooth plate to engage and lock.

3. The centrifuge for water quality testing according to claim 2, wherein: The side of the limit block is connected to a telescopic rod, which is "L"-shaped. The other end of the telescopic rod is slidably installed inside the sliding rod, and the telescopic rod is suitable for cooperating with the adjusting member to move up and down.

4. The centrifuge for water quality testing according to claim 3, wherein: A connecting rod is connected to one side of the storage chamber, and the storage chamber is rotatably arranged on the side of the rotor through the connecting rod; a placement chamber is arranged inside the connecting rod, and the adjustment member and the counterweight assembly are both installed in the placement chamber.

5. The centrifuge for water quality testing according to claim 4, wherein: The upper portion of the connecting rod is provided with a through hole, which is suitable for inserting the adjusting rod. The middle portion of the adjusting rod is provided with a limit plate, which is suitable for limiting the relative distance between the adjusting rod and the limit block.

6. The centrifuge for water quality testing according to claim 4, wherein: A support rod is installed on the telescopic rod, and a support groove is provided at the lower part of the placement cavity. The support rod is slidably installed in the support groove, and the support groove is suitable for cooperating with the telescopic rod to provide support for the adjusting member.

7. The centrifuge for water quality testing according to claim 1, wherein: A rotating shaft is provided at the lower end of the rotor, and the rotating shaft is suitable for providing power to the rotor; a box is connected to the outside of the body, and the box is suitable for placing the body, and a storage tank is provided in the box.

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