Reagent adding device and sampler

Abstract

The utility model discloses a reagent adding device and a sampler, and belongs to the technical field of environment detection devices.The reagent adding device comprises a reagent bin, the reagent bin comprises a sample introduction channel and at least one reagent containing cavity used for containing fixing agents, the sample introduction channel is provided with a sample outlet, and the reagent containing cavity is provided with a reagent outlet; the sealing assembly is used for sealing the sample outlet and the reagent outlet, so that the reagent accommodating cavity is in a closed state, and the sample outlet and the reagent outlet are opened under the impact acting force of the sample liquid in the sample injection process of the sample injection channel. According to the utility model, the technical problems of how to store the reagent by using a small space and how to automatically add the reagent in the sampler can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental detection devices, in particular, to a reagent adding device. In addition, the utility model also relates to a sampling bottle comprising the reagent adding device. Background Art

[0002] In the field of environmental testing technology, according to the sampling specifications, when sampling water quality, different fixatives should be added for preservation according to the items (parameters) that need to be monitored. For example, when collecting water samples for the determination of cyanide, sodium hydroxide should be added to the water samples and the pH should be adjusted to ≥ 12; when collecting water samples for the determination of general metals and metalloids, nitric acid should be added and the pH should be adjusted to ≤ 2; when collecting water samples for the determination of volatile organic compounds, hydrochloric acid (1+1) should be added and the pH should be adjusted to ≤ 2. For water samples containing disinfectants such as residual chlorine, 0.01g~0.02g / L ascorbic acid should be added to the water samples.

[0003] In the existing water quality sampling process, after the samples are manually collected and placed in the sampling bottle, the corresponding fixative is added to the sampling bottle. The problem with the above operation method is that it is necessary to carry a large number of fixative reagent containers when sampling, which causes great inconvenience to the sampling work, and requires the full participation of professionals, and the operation is cumbersome and time-consuming. If the fixative is added directly to the sampling bottle, since the sampling bottle requires a small amount of fixative, the reagent may change its composition due to oxidation in the sampling bottle, thereby affecting the preservation effect of the water sample. When the collected water samples need to add multiple fixatives, storing fixatives of different properties together will affect their quality, so they need to be stored separately. In addition, the addition of multiple fixatives must be added in sequence according to the requirements of the sampling specifications, otherwise it will affect the preservation effect of the sample.

[0004] In response to the above problems, this application proposes an improvement plan based on the sampling device with patent application number 202011633211.0, and provides an automatic reagent adding device and a sampler. Utility Model Content

[0005] The utility model provides a reagent adding device to solve the technical problem of how to use a small space to store reagents and realize automatic reagent adding.

[0006] At the same time, the utility model also provides a sampler including the above reagent adding device, which can realize automatic addition of reagents during the sampling process.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A reagent adding device comprises: a reagent chamber, the reagent chamber comprising an injection channel and at least one reagent containing chamber for placing a fixative, the injection channel being provided with a sample outlet, and the reagent containing chamber being provided with a reagent outlet;

[0009] The sealing component is used to seal the sample outlet and the reagent outlet so that the reagent containing chamber is in a closed state, and the sample outlet and the reagent outlet are opened under the impact force of the sample liquid during the injection process of the injection channel.

[0010] Furthermore, a reagent containing chamber is provided in the reagent compartment and the reagent containing chamber is provided in the injection channel, and the reagent outlet and the sample outlet are the same outlet.

[0011] In another embodiment of the utility model, a plurality of reagent containing chambers are separated from top to bottom in the reagent compartment, one of which is arranged in the injection channel and the reagent outlet of the reagent containing chamber is the same as the sample outlet, and the reagent outlets of each reagent containing chamber are connected to the sample outlet when opened.

[0012] Furthermore, the sealing assembly comprises a sealing door, and the sealing door is detachably arranged at the reagent outlet.

[0013] Furthermore, the sealing door is engaged in the limiting grooves preset on both sides of the reagent outlet of the reagent chamber for positioning.

[0014] Furthermore, the sealing door is connected to the reagent chamber via a first elastic connector, and the pre-tightening force of the first elastic connector pulls the sealing door tightly against the reagent outlet to seal the reagent outlet.

[0015] In another scheme of the utility model, the sealing assembly includes a sealing member, which includes a sealing body movably arranged in the reagent chamber, the sealing body is provided with grooves spaced vertically, the grooves and the inner wall of the reagent chamber form the reagent accommodating chamber, the side wall of the reagent chamber is provided with at least one side outlet, the outer side wall of the sealing body is fitted with the side outlet, and when the sample liquid in the injection channel impacts the sealing body to cause it to displace, the opening of the groove is connected to the side outlet, thereby opening the sample outlet and the reagent outlet.

[0016] Furthermore, a limiting column is disposed at the first end of the sealing body, the limiting column is penetrated into a mounting hole preset on the inner wall of the reagent compartment, and a limiting boss is disposed at the outer end of the limiting column.

[0017] According to another aspect of the utility model, a sampler is provided, comprising a bottle cap and a bottle body, the sampler further comprising the above-mentioned reagent adding device, wherein the injection channel of the reagent adding device is connected to a preset liquid inlet in the bottle cap.

[0018] The utility model has the following beneficial effects:

[0019] The utility model pre-places a fixative in a reagent holding chamber in a reagent compartment, and uses a smaller reagent holding chamber to store the fixative, which can reduce the oxidation of the fixative and effectively improve the preservation effect of the sample. The sample outlet of the reagent compartment and the reagent outlet of the reagent holding chamber are sealed by a sealing component, and the position of the sealing component changes under the impact force of the sample liquid during the injection process of the injection channel, thereby opening the sample outlet and the reagent outlet, and the fixative in the reagent holding chamber can be released while the liquid is discharged, which can greatly reduce the workload of the sampling personnel and effectively improve the sampling efficiency. In addition, different types of fixatives can be stored separately through different reagent holding chambers to avoid storing fixatives of different properties together to affect their quality; at the same time, different fixatives can be released in sequence, effectively ensuring the preservation effect of the sample liquid. The device has a simple structure, and sampling is simple and efficient.

[0020] The sampler of the utility model also has the above-mentioned beneficial effects.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all the advantages described above at the same time. In addition to the purposes, features and advantages described above, the present invention also has other purposes, features and advantages. The present invention will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment 1 of the utility model;

[0024] Figure 2 It is a schematic diagram of the opening state of the sealing door of the preferred embodiment 1 of the utility model.

[0025] Figure 3 It is a schematic diagram of the overall structure of the preferred embodiment 2 of the utility model.

[0026] Figure 4 It is a schematic diagram of the opening state of the sealing door of the second preferred embodiment of the utility model.

[0027] Figure 5 It is a schematic diagram of the appearance of a bottle cap according to a preferred embodiment of the utility model.

[0028] Figure 6 It is a top view schematic diagram of the preferred embodiment 3 of the utility model.

[0029] Figure 7 It is a schematic diagram of the release state of the third preferred embodiment of the utility model.

[0030] Figure 8 It is a schematic diagram of the packaging state of the third preferred embodiment of the utility model.

[0031] Fig. 9 It is a three-dimensional structural schematic diagram of the release state of the preferred embodiment 3 of the utility model.

[0032] Fig.10 It is a three-dimensional structural schematic diagram of the packaging state of the preferred embodiment 3 of the utility model.

[0033] Legend: 1. Water outlet; 2. Reagent compartment; 3. Sealing member; 4. First reagent holding chamber; 5. Second outlet; 6. Second reagent holding chamber; 7. First reagent outlet; 8. Limiting column; 9. Sealing door. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0035] Please refer to the attached drawing, which is a schematic structural diagram of a preferred embodiment of a reagent adding device and a sampler provided by the present invention.

[0036] A reagent adding device, comprising: a reagent chamber 2, the reagent chamber 2 comprising an injection channel and at least one reagent containing chamber for placing a fixative, the injection channel being provided with a sample outlet, and the reagent containing chamber being provided with a reagent outlet;

[0037] The sealing component is used to seal the sample outlet and the reagent outlet so that the reagent containing chamber is in a closed state, and the sample outlet and the reagent outlet are opened under the impact force of the sample liquid during the injection process of the injection channel.

[0038] It should be noted that, in some preferred embodiments, the reagent containing chamber is disposed in the injection channel, and in this case, the sample outlet and the reagent outlet are the same outlet.

[0039] The utility model pre-sets a fixative in the reagent holding chamber in the reagent compartment 2, and uses the reagent holding chamber with a smaller space to store the fixative, which can reduce the oxidation of the fixative and effectively improve the preservation effect of the sample. The sample outlet of the reagent compartment 2 and the reagent outlet of the reagent holding chamber are sealed by a sealing component, and the position of the sealing component changes under the impact force of the sample liquid during the injection process of the injection channel, thereby opening the sample outlet and the reagent outlet, and the fixative in the reagent holding chamber can be released while the liquid is discharged, which can reduce the workload of the sampling personnel to a greater extent and effectively improve the sampling efficiency. In addition, different types of fixatives can be stored separately through different reagent holding chambers to avoid storing fixatives of different properties together to affect their quality; at the same time, different fixatives can be released in sequence, effectively ensuring the preservation effect of the sample liquid. The device has a simple structure, and the sampling of the sampler using the device is simple and efficient. In addition, the utility model device is processed with PTFE material, which has excellent chemical stability and high wear resistance and softness.

[0040] Preferably, a reagent containing chamber is provided in the reagent compartment 2 and the reagent containing chamber is provided in the injection channel, and the reagent outlet and the sample outlet are the same outlet. Such an arrangement makes the structure simpler.

[0041] In another preferred embodiment of the present invention, a plurality of reagent containing chambers are separated from top to bottom in the reagent compartment 2, one of which is arranged in the injection channel and the reagent outlet of the reagent containing chamber is the same as the sample outlet, and the reagent outlets of each reagent containing chamber are connected to the sample outlet when opened.

[0042] Embodiment 1

[0043] Please refer to Figure 1 As shown, the reagent compartment 2 is divided into a plurality of reagent holding chambers from top to bottom, the uppermost reagent holding chamber is arranged in the sample injection channel, the reagent outlet of the uppermost reagent holding chamber is the same outlet as the sample outlet, and the reagent outlets of each reagent holding chamber are connected to the sample outlet when opened. When the fixative stored in the lower reagent holding chamber is a liquid reagent, a retaining edge is arranged at the reagent outlet to prevent the fixative from flowing out when the reagent outlet is opened and affecting the sample liquid preservation effect.

[0044] Preferably, when a reagent holding chamber is further provided below the reagent holding chamber in the injection channel, the lower side of the channel of the reagent holding chamber below should be shorter than the upper side to prevent the liquid from splashing into the reagent holding chamber below when the liquid flows out into the sampling bottle and affecting the sample liquid preservation effect.

[0045] It can be understood that when the injection channel of the reagent chamber 2 starts to inject samples, the position of the sealing component changes under the impact force of the sample liquid, and the sealing component detaches from the reagent chamber 2 to open the sample outlet and the reagent outlet. At this time, the uppermost reagent holding chamber first contacts with the sample liquid and releases the fixative, and when the liquid level reaches the lower reagent holding chamber, the fixative therein contacts with the liquid and is released in large quantities, so that the release of multiple fixatives can be achieved in batches in sequence.

[0046] Take the two-layer reagent chamber as an example, please refer to Figure 1 , the second reagent holding chamber 6 is located above the first reagent holding chamber 4 and is arranged in the injection channel. At this time, the second reagent holding chamber 6 is connected to the injection channel, and the sample liquid in the injection channel flows along the direction of the arrow. The sample outlet of the injection channel (the same outlet as the reagent outlet of the second reagent holding chamber 6) and the reagent outlet of the first reagent holding chamber 4 are both shielded and sealed by the sealing component. When the sample liquid in the injection channel breaks the sealing component, the sample outlet and the reagent outlet of the reagent holding chamber are opened, and the second reagent holding chamber 6 first contacts the sample liquid to release the fixative. When the liquid level in the sampling bottle rises to the first reagent holding chamber 4 below, the fixative in the first reagent holding chamber 4 contacts the liquid and is released in large quantities.

[0047] Embodiment 2

[0048] Please refer to Figure 2 As shown, a plurality of reagent containing chambers are separated from top to bottom in the reagent compartment 2, and the outlets of each reagent containing chamber are connected to the sample outlet when opened, the reagent containing chamber of the bottom layer is arranged in the injection channel, and the reagent outlet of the reagent containing chamber of the bottom layer is the same outlet as the sample outlet.

[0049] It can be understood that when the sample inlet channel of the reagent chamber 2 begins to take in liquid, the position of the sealing component changes under the impact force of the sample liquid, and the sealing component detaches from the reagent chamber 2 to open the sample outlet. At this time, the reagent holding chamber in the lower layer first contacts with the liquid and releases the fixative. When the liquid level reaches the reagent holding chamber in the upper layer, the fixative therein contacts with the liquid and is released in large quantities. In this way, the release of multiple fixatives in batches in sequence can also be achieved.

[0050] Take the two-layer reagent chamber as an example, please refer to Figure 2, the second reagent holding chamber 6 is located above the first reagent holding chamber 4, and the first reagent holding chamber 4 is arranged in the injection channel. At this time, the first reagent holding chamber 4 is connected to the injection channel, and the sample liquid in the injection channel flows along the arrow direction. It should be noted that when the fixative in the second reagent holding chamber 6 is a liquid reagent, a vertical baffle can be set on the isolation plate between the second reagent holding chamber 6 and the first reagent holding chamber 4 to block the fixative in the second reagent holding chamber 6, so as to avoid the fixative being released in advance when the reagent outlet of the second reagent holding chamber 6 is opened. Similarly, the sample outlet of the injection channel (which is the same outlet as the reagent outlet of the first reagent holding chamber 4) and the second reagent holding chamber 6 are both shielded and sealed by the sealing component. When the sample liquid of the injection channel flushes the sealing component, the sample outlet and the reagent outlet of the reagent holding chamber are opened, and the first reagent holding chamber 4 first contacts with the sample liquid to release the fixative. When the liquid level in the bottle rises to the second reagent holding chamber 6 below, the fixative in the second reagent holding chamber 6 contacts with the liquid and is released in large quantities.

[0051] Preferably, please refer to Figure 1 , 2 As shown, the sealing assembly includes a sealing door 9, and the sealing door 9 is detachably arranged at the reagent outlet.

[0052] It is understandable that the detachable sealing door 9 can be separated from the reagent chamber 2 under the impact force of the sample liquid to open the sample outlet and the reagent outlet. When the sealing door 9 is not separated from the reagent chamber 2, it can seal the reagent outlet to reduce the air circulation into the reagent containing chamber, thereby reducing the oxidation of the fixative.

[0053] For details, please refer to Figure 1 , 2 As shown, the sealing door 9 is engaged in the limiting grooves preset on both sides of the reagent outlet of the reagent chamber 2 for positioning. The sealing door 9 can be easily disassembled through the positioning.

[0054] It should be noted that the side wall of the sealing door 9 may be provided with a limiting block to cooperate with the limiting grooves on both sides of the reagent outlet for locking connection.

[0055] In another preferred embodiment, the sealing door 9 is connected to the reagent chamber 2 via a first elastic connector, and the pre-tightening force of the first elastic connector pulls the sealing door 9 tight against the sample outlet to seal the sample outlet.

[0056] It can be understood that the sample outlet is sealed by tightening the sealing door 9 through the first elastic connecting member, and the first elastic connecting member not only plays a connecting role, but also prevents the sealing door 9 from being completely washed away.

[0057] Embodiment 3

[0058] Please refer to Figure 3-7 As shown, the sealing assembly includes a sealing member 3, and the sealing member 3 includes a sealing body movably arranged in the reagent chamber 2, and the outer wall of the sealing body is fitted with the inner wall of the reagent chamber 2, and grooves are vertically spaced along the upper side of the sealing body, and the grooves and the inner wall of the reagent chamber 2 form the reagent accommodating chamber, and the side wall of the reagent chamber 2 is provided with at least one side outlet, and the outer wall of the sealing body is fitted with the side outlet, and when the sample liquid in the injection channel impacts the sealing body to cause it to displace, the opening of the groove is connected to the side outlet, thereby opening the sample outlet and the reagent outlet.

[0059] It can be understood that the sealing body is a columnar structure and can slide in the reagent compartment 2, so that the sample outlet and / or reagent outlet on the side wall of the reagent compartment 2 are shielded and sealed through one end of the sealing body, and when the liquid in the injection channel impacts the sealing body to cause it to be displaced, the groove on the sealing body moves to the side outlet of the reagent compartment 2, and when the liquid level reaches each side outlet, the sample liquid contacts the fixative to start the reagent release. It should be noted that in an optional solution of the utility model, an opening can be opened at the bottom of the reagent compartment 2, and when the sample liquid in the injection channel impacts the sealing body to cause it to be displaced, the sealing body extends out of the opening at the bottom of the reagent compartment 2 and exposes a groove on the sealing body.

[0060] Preferably, a reagent containing chamber is provided in the reagent compartment 2 and the reagent containing chamber is provided in the injection channel, and the reagent outlet and the sample outlet are the same outlet. Such an arrangement makes the structure simpler.

[0061] Optionally, when multiple fixatives need to be added to the sample liquid, and the second and subsequent fixatives in the release order are liquid reagents, a retaining edge is provided on the groove to prevent the fixative from flowing out when the reagent outlet is opened and affecting the sample liquid preservation effect.

[0062] For example, the sealing body has two grooves and the bottom of the reagent compartment 2 has an opening. Figure 3 , 4, 6, 7, the groove at the bottom forms the first reagent holding chamber 4, the groove at the upper part forms the second reagent holding chamber 6, and there are two side outlets, namely the water outlet 1 and the second outlet 5. At this time, the sample outlet is the water outlet 1 on the side wall of the reagent chamber 2. When the sample liquid impacts the injection channel, the sealing body is displaced, so that the groove opening on the sealing body is connected with the side outlet of the reagent chamber 2, and the sealing body extends out of the opening at the bottom of the reagent chamber 2 and exposes a groove on the sealing body. At this time, the second outlet 5 and the water outlet 1 are opened at the same time, and the first reagent holding chamber 4 is also exposed in the reagent chamber 2. At this time, the sample liquid flows out from the water outlet 1, and the fixative in the first reagent holding chamber 4 is released first (at this time, the groove opening of the first reagent holding chamber 4 is equivalent to the first reagent outlet 7). When the liquid level overflows to the second outlet 5, the fixative in the second reagent holding chamber 6 begins to be released, so that multiple fixatives can be released step by step, and the space of the reagent holding chamber formed by each groove is small, which can delay the oxidation of the fixative.

[0063] Preferably, please refer to Figure 3-7 As shown, a limiting column 8 is provided at the first end of the sealing body. The limiting column 8 penetrates into a preset mounting hole on the inner wall of the reagent compartment 2, and a limiting boss is provided at the outer end of the limiting column 8.

[0064] It can be understood that the limit column 8 can guide and limit the sealing body. The displacement direction of the sealing body is guided by the limit column 8. At the same time, the limit platform of the limit column 8 can limit the sealing body from being completely washed away by the liquid, and the length of the limit column 8 can also adjust the displacement distance of the sealing body.

[0065] According to another aspect of the utility model, a sampler is provided, comprising a bottle cap and a bottle body, the sampler further comprising the above-mentioned reagent adding device, wherein the injection channel of the reagent adding device is connected to a preset liquid inlet in the bottle cap.

[0066] The sampler of the utility model also has the above-mentioned beneficial effects. It should be noted that, in this article, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0067] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the utility model, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection of the utility model.

Claims

1. A reagent adding device, characterized in that: include: A reagent compartment (2), the reagent compartment (2) comprising an injection channel and at least one reagent containing cavity for placing a fixative, the injection channel being provided with a sample outlet, and the reagent containing cavity being provided with a reagent outlet; The sealing component is used to seal the sample outlet and the reagent outlet so that the reagent containing chamber is in a closed state, and the sample outlet and the reagent outlet are opened under the impact force of the sample liquid during the injection process of the injection channel.

2. A reagent adding device according to claim 1, characterized in that: A reagent containing chamber is arranged in the reagent chamber (2) and the reagent containing chamber is arranged in the injection channel, and the reagent outlet and the sample outlet are the same outlet.

3. A reagent adding device according to claim 1, characterized in that: The reagent compartment (2) is provided with a plurality of reagent containing chambers separated from top to bottom, wherein one of the reagent containing chambers is provided in the sample injection channel and the reagent outlet of the reagent containing chamber is the same outlet as the sample outlet, and the reagent outlets of the various reagent containing chambers are connected to the sample outlet when opened.

4. A reagent adding device according to any one of claims 2 or 3, characterized in that: The sealing assembly comprises a sealing door (9), and the sealing door (9) is detachably arranged at the reagent outlet.

5. A reagent adding device according to claim 4, characterized in that: The sealing door (9) is engaged with the limiting grooves preset on both sides of the reagent outlet of the reagent chamber (2) for positioning.

6. A reagent adding device according to claim 4, characterized in that: The sealing door (9) is connected to the reagent chamber (2) via a first elastic connecting piece, and the pre-tightening force of the first elastic connecting piece pulls the sealing door (9) tightly against the reagent outlet to seal the reagent outlet.

7. A reagent adding device according to claim 1, characterized in that: The sealing assembly comprises a sealing member (3), wherein the sealing member (3) comprises a sealing body movably arranged in the reagent chamber (2), and the outer wall of the sealing body is arranged in contact with the inner wall of the reagent chamber 2, and grooves are vertically spaced apart on the upper side of the sealing body, and the grooves and the inner wall of the reagent chamber (2) form the reagent containing cavity.

8. A reagent adding device according to claim 7, characterized in that: The side wall of the reagent chamber (2) is provided with at least one side outlet, and the outer side wall of the sealing body is in contact with the side outlet. When the sample liquid in the injection channel impacts the sealing body to cause it to move, the opening of the groove is connected to the side outlet, thereby opening the sample outlet and the reagent outlet.

9. A reagent adding device according to claim 8, characterized in that: A limiting column (8) is arranged at the first end of the sealing body, and the limiting column (8) is arranged to penetrate a mounting hole preset on the inner wall of the reagent compartment (2), and a limiting boss is arranged at the outer end of the limiting column (8).

10. A sampler, comprising a bottle body and a bottle cap, characterized in that: The sampler further comprises a reagent adding device as claimed in any one of claims 1 to 9, wherein an injection channel of the reagent adding device is connected to a liquid inlet preset in the bottle cap.

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