Limiting structure, automatic lofting equipment and automatic sample injection method

Abstract

The invention belongs to the technical field of automatic sampling, and discloses a limiting structure, automatic sampling equipment and an automatic sampling method. The limiting structure is arranged at one end of the sample tube, and the clamping piece can clamp the limiting structure and place the sample tube in the sample placing hole. The structure comprises a main body part coaxially arranged on the periphery of the sample tube, the main body part comprises a first main body and a second main body which are sequentially connected, the diameter of the first main body is larger than that of the second main body, the diameter of the second main body is larger than the outer diameter of the sample tube, and under the action of gravity, the limiting structure and the sample tube can vertically and downwards fall into the sample placing hole. An abutting inclined plane is arranged at the joint of the first main body and the second main body, and when the main body part is arranged in the sample placing hole, the abutting inclined plane can abut against the limiting step of the sample placing hole. By using the structure, the sample injection of the sample tube is more convenient. The automatic sample injection equipment and the automatic sample injection method can complete automatic sample injection accurately and efficiently at a high speed.

Description

Technical Field

[0001] The invention relates to the technical field of automatic sampling, and in particular to a limiting structure and automatic sampling equipment. Background Art

[0002] In the prior art, the EPR sample tube is usually relatively long. When using the EPR spectrometer for resonance measurement and analysis, the sample tube needs to be placed in the injection hole through an automatic sampling device. However, during the automatic sampling process, the device cannot sense whether the sample tube is in contact with the inner wall of the injection port. If the axis of the sample tube deviates too much from the axis of the injection port, the sample tube is easily stuck at the injection port and may even be broken by force. In addition, the matching clearance between the injection port and the sample tube in the prior art is relatively small, and the sample tube needs to be accurately aligned with the injection port and placed therein. However, most of the prior art adopts a method in which a robot directly clamps the injection tube and places it in the injection port. The robot cannot accurately determine whether the sample tube is in contact with the injection port, and direct placement may cause the risk of breaking the sample tube. In addition, the same problem also exists in unattended injection systems.

[0003] Therefore, there is an urgent need for a limiting structure, an automatic sampling device and an automatic sampling method to solve the problem that the sample tube is not easy to place in the injection hole and the automatic sampling is inconvenient and cannot be quickly and efficiently injected. Summary of the invention

[0004] One object of the present invention is to provide a limiting structure to solve the problem that a sample tube is not easily placed in a sampling hole.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A limiting structure is provided at one end of a sample tube, and a clamping member can clamp the limiting structure and place the sample tube in a sample hole, characterized in that it comprises:

[0007] The main body is coaxially arranged on the outer circumference of the sample tube, and the main body includes a first main body and a second main body connected in sequence. The diameter of the first main body is greater than the diameter of the second main body, and the diameter of the second main body is greater than the outer diameter of the sample tube. Under the action of gravity, the limiting structure can fall vertically downward into the sample hole with the sample tube. An abutting slope is provided at the connection between the first main body and the second main body. When the main body is placed in the sample hole, the abutting slope can abut against the limiting step of the sample hole.

[0008] Preferably, the limiting structure is made of a rigid material, and the outer periphery of the limiting structure is coated with a lubricating coating.

[0009] Preferably, the distance between the end of the first body away from the second body and the abutting inclined surface is greater than the distance between the limiting step and the top end of the lofting hole.

[0010] Preferably, a hanging portion is provided at one end of the first body away from the second body, and when the abutting inclined surface abuts against the limiting step of the lofting hole, the hanging portion can abut against the outer periphery of the top end of the lofting hole.

[0011] Preferably, a guiding slope is provided at one end of the second body away from the first body.

[0012] Another object of the present invention is to provide an automatic sampling device to solve the problems of inconvenience of automatic sampling and low sampling efficiency.

[0013] To achieve this object, the present invention adopts the following technical solutions:

[0014] An automatic sampling device, characterized in that it includes a storage mechanism, a resonator, a clamping member and a limiting structure; the storage mechanism is used to store the sample tube, the sample tube is provided with the limiting structure, the resonator is provided with the sample hole, the clamping member can clamp the limiting structure and place the sample tube in the sample hole.

[0015] Preferably, the automatic sampling device also includes a sliding assembly, which includes a first linear slide, a second linear slide and a third linear slide, whose output directions are respectively in the first direction, the second direction and the third direction; the clamping member is arranged at the bottom end of the first linear slide and can slide along the first direction; the first linear slide is arranged at one end of the second linear slide; the second linear slide is slidably connected to the third linear slide; the second linear slide can drive the clamping member to slide along the second direction; and the second linear slide can slide along the third direction; the first direction is a vertical direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0016] Preferably, a first detection component is provided at the sample hole, and the first detection component is used to detect whether the sample tube is placed in the sample hole.

[0017] Preferably, a second detection piece is provided at the sample hole, a positioning portion is provided on the clamping piece, an alignment site is provided at the bottom end of the positioning portion, and when the alignment site is opposite to the second detection piece, the sample tube is opposite to the sample hole, so that after the clamping piece releases the sample tube, the sample tube falls into the sample hole.

[0018] Preferably, the second detection element is a distance measuring device, and there is a first characteristic distance between the alignment site and the second detection element.

[0019] Preferably, an indication site is provided on the clamping member, and the indication site is used to indicate the azimuthal relationship between the position directly facing the second detection member and the alignment site, and a second characteristic distance exists between the indication site and the second detection member.

[0020] Preferably, there are a plurality of indicator sites, and the plurality of indicator sites are distributed around the alignment site, and the plurality of indicator sites can respectively form different second characteristic distances with the second detection element.

[0021] Preferably, there are four indicator sites, and the four indicator sites are arranged in pairs along the second direction and the third direction.

[0022] Preferably, a distance mark is provided on the clamping member, the distance mark is rectangular and can have a third characteristic distance with the second detection member, and the side of the distance mark is parallel to the second direction or the third direction;

[0023] The alignment site is located at the center of the distance marker, and a line passing through the alignment site and parallel to the second direction or the third direction divides the position inside the distance marker into four parts, and the four parts correspond to the four indicator sites respectively.

[0024] Another object of the present invention is to provide an automatic sampling method to solve the problems of slow automatic sampling speed and low sampling accuracy.

[0025] To achieve this object, the present invention adopts the following technical solutions:

[0026] An automatic sampling method, characterized in that, based on the automatic sampling device according to claim 9, the automatic sampling method comprises the following steps:

[0027] S100, the clamping member clamps the limiting structure to take out the sample tube from the storage mechanism;

[0028] S200, the clamping member drives the sample tube to move above the sample hole;

[0029] S300, driving the clamping member along the second direction and the third direction so that the alignment site is directly opposite to the second detection member;

[0030] S400: After the alignment site is aligned with the second detection member, the clamping member releases the limiting structure to allow the sample tube to fall into the sample placement hole.

[0031] Preferably, the automatic sampling method further comprises the following steps:

[0032] S500, detecting whether the sample tube is in the first state or the second state:

[0033] S502, starting sample testing when the sample tube is in the first state;

[0034] S503, when the sample tube is in the second state, the clamping member takes out the sample tube from the sample placement hole, puts the sample tube back into the storage mechanism, and repeats the above steps S100 to S400 to reload another sample tube.

[0035] Preferably, the step S500 further includes the following steps:

[0036] S501. The resonator tunes the sample tube. When the sample tube can complete tuning, the sample tube is in the first state. When the sample tube fails to complete tuning, the sample tube is in the second state.

[0037] Preferably, the step S501 includes:

[0038] S5011, the tuning motor of the resonator can drive the tuning rod to complete the preset stroke and reach the critical coupling state, and the sample tube can complete the tuning;

[0039] S5011. The tuning motor of the resonator cannot drive the tuning rod to complete the preset stroke and fails to reach the critical coupling state, and the sample tube fails to complete tuning.

[0040] Preferably, the values ​​generated during the tuning process can form a tuning curve, and when all the values ​​of the tuning curve are smaller than a set threshold, the sample tube reaches the critical coupling state.

[0041] Beneficial effects of the present invention:

[0042] The present invention belongs to the technical field of automatic injection, and discloses a limiting structure. The structure includes a main body coaxially arranged on the outer periphery of a sample tube, the main body includes a first main body and a second main body connected in sequence, the diameter of the first main body is larger than the diameter of the second main body, the diameter of the second main body is larger than the outer diameter of the sample tube, under the action of gravity, the limiting structure can fall vertically downward into the sample hole with the sample tube, and a contact slope is provided at the connection between the first main body and the second main body. When the main body is placed in the sample hole, the contact slope can contact the limiting step of the sample hole. The use of this structure can make sample tube injection more convenient.

[0043] The present invention also provides an automatic sample introduction device, which is used in conjunction with the above-mentioned limiting structure to solve the problem of inconvenience in automatically placing sample tubes.

[0044] The present invention also provides an automatic sampling method, which can be used to quickly, accurately and efficiently complete the automatic sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is an isometric view of the automatic sampling device provided by the present invention;

[0046] Figure 2 is an isometric view of the resonator provided by the present invention;

[0047] Figure 3 The present invention provides Figure 2 The cross-section along the AA direction;

[0048] Figure 4 is a schematic diagram of a sample tube and a limiting structure provided by the present invention;

[0049] Figure 5 It is a schematic diagram of the positioning structure of the bottom of the clamping member provided by the present invention;

[0050] Figure 6 The present invention provides Figure 1 A partial enlarged view of part A.

[0051] In the figure:

[0052] 10. Main body; 11. First main body; 12. Second main body; 13. Abutting inclined surface; 14. Guide inclined surface;

[0053] 20. Suspension unit;

[0054] 30. Depository institutions;

[0055] 40. Sliding assembly; 41. First linear slide rail; 42. Second linear slide rail; 43. Third linear slide rail;

[0056] 50. Resonator; 51. Limiting tube; 52. Fastener; 53. Protective shell; 54. Lofting hole;

[0057] 60, positioning part; 61, alignment site; 62, first indicator mark; 63, second indicator mark; 64, third indicator mark; 65, fourth indicator mark; 66, distance mark;

[0058] 70. First test piece;

[0059] 80. Second test piece;

[0060] 90. Base;

[0061] 100. Sample tube. DETAILED DESCRIPTION

[0062] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0063] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0065] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0066] This embodiment provides an automatic sampling device, such as Figure 1 and Figure 2 As shown, the device includes a storage mechanism 30, a resonator 50 and a clamp; the storage mechanism 30 is used to store the sample tube 100, the resonator 50 is provided with a sample hole 54, and the clamp can clamp the sample tube 100 and place the sample tube 100 in the sample hole 54. However, the matching clearance between the sample hole 54 and the sample tube 100 in the prior art is small, and the clamp cannot determine whether the sample tube 100 is in contact with the sample hole 54. Direct placement may cause the risk of breaking the sample tube 100. In this embodiment, the resonator 50 is an EPR spectrometer.

[0067] To solve this technical problem, Figure 3 and Figure 4 As shown, this embodiment also provides a limiting structure, which is arranged at one end of the sample tube 100, and the clamping member can clamp the limiting structure and place the sample tube 100 in the sample hole 54. The limiting structure includes a main body 10, which is coaxially arranged on the outer periphery of the sample tube 100. The main body 10 includes a first main body 11 and a second main body 12 connected in sequence. The diameter of the first main body 11 is larger than the diameter of the second main body 12, and the diameter of the second main body 12 is larger than the outer diameter of the sample tube 100. Under the action of gravity, the limiting structure can fall vertically downward with the sample tube 100 into the sample hole 54. The connection between the first main body 11 and the second main body 12 is provided with an abutting inclined surface 13. When the main body 10 is placed in the sample hole 54, the abutting inclined surface 13 can abut against the limiting step of the sample hole 54.

[0068] In the above structure, firstly, the clamping member clamps the limiting structure, thereby avoiding the clamping member directly clamping the sample tube 100, thereby reducing the possibility of the sample tube 100 being broken during the clamping process; secondly, the limiting structure is only set at one end of the sample tube 100, and the other end of the sample tube 100 can enter the sample hole 54 to participate in the resonance; in addition, when the clamping member clamps the limiting structure to the top of the sample hole 54, a part of the sample tube 100 is placed in the sample hole 54, and the clamping force of the clamping member is canceled at this time, so that the sample tube 100 and the limiting structure perform free fall motion. Since the gravity is vertically downward, the sample tube 100 The quality tube 100 and the limiting structure fall vertically downward into the sample hole 54. When the limiting structure enters the sample hole 54, the outside of the limiting structure can be placed in the sample hole 54 and abut the side wall of the sample hole 54. Since the sample tube 100 has a small diameter, it will not contact the side wall of the sample hole 54, thereby ensuring that the sample tube 100 will not break. Finally, since the connection between the first body 11 and the second body 12 is provided with an abutting slope 13, the abutting slope 13 can abut against the limiting step, thereby avoiding the sample tube 100 falling to the bottom of the sample hole 54 and causing the sample tube 100 to break. The structure is simple, easy to use, and highly practical.

[0069] It should be noted here that the outer diameter of the limiting structure matches the inner diameter of the sample hole 54, and the diameter of the sample tube 100 is smaller than the diameter of the limiting structure, so the sample tube 100 will not come into contact with the sample hole 54. In addition, in order to ensure that the sliding process of the falling limiting structure and the sample hole 54 is smoother, the limiting structure is made of a rigid material. If the limiting structure is made of elastic material, although it can better buffer and reduce shock, the elastic material will deform during the clamping process, which is not conducive to the axial control of the sample tube 100; in addition, the limiting structure of the rigid material can reduce the friction between itself and the inner wall of the sample hole 54, thereby accelerating the fall. At the same time, after the sample tube 100 is tilted, the limiting structure and the sample hole 54 can slide and abut against each other, so that the sample tube 100 can be quickly straightened until the abutting slope 13 can abut against the limiting step. It is further explained that, in this embodiment, the limiting structure and the inner wall of the layout hole 54 are coated with a lubricating coating, and the coating can be any one of Teflon or lubricating grease, etc., which is not specifically limited in this embodiment.

[0070] It is further explained that, in this embodiment, Figure 3 and Figure 4 As shown, a limiting tube 51 is also provided in the sample hole 54. The limiting tube 51 is coaxially provided in the sample hole 54. A limiting through hole is axially provided in the limiting tube 51. The sample tube 100 can extend from the limiting through hole and enter the sample hole 54. The diameter of the limiting through hole is smaller than the diameter of the sample hole 54, so that the sample tube 100 will not collide with the sample hole 54 after extending from the limiting tube 51. The limiting step is provided in the limiting tube 51, and there is no need to separately process the limiting step in the resonator 50, thereby reducing the overall manufacturing cost; in addition, the limiting tube 51 can be detachably connected to the sample hole 54 and fixed by a fastener 52. This arrangement can facilitate subsequent maintenance and replacement. It is further explained that in this embodiment, the fastener 52 is a fixing cap with a thread provided inside, and the threaded connection is convenient for installation and easy disassembly and assembly. In addition, a sampling port is formed together at the top of the fixing cap and the limiting tube 51 , and the sample tube 100 can enter the sample placement hole 54 through the sampling port, which is convenient for operation and has high convenience.

[0071] like Figure 3 and Figure 4 As shown, the distance between the end of the first body 11 away from the second body 12 and the abutting inclined surface 13 is greater than the distance between the limiting step and the top of the sample hole 54. This arrangement can ensure that when the abutting inclined surface 13 abuts against the limiting step, the top of the first body 11 can be located outside the sample hole 54, thereby facilitating the clamping of the clamping member and taking out the sample tube 100.

[0072] like Figure 3 and Figure 4As shown, a hanging portion 20 is provided at one end of the first body 11 away from the second body 12, and when the abutting inclined surface 13 abuts against the limiting step of the sample hole 54, the hanging portion 20 can abut against the outer periphery of the top of the sample hole 54. By providing the hanging portion 20, it is further possible to prevent the limiting structure from completely entering the sample hole 54, thereby ensuring that the sample tube 100 can be quickly taken out.

[0073] like Figure 3 and Figure 4 As shown, a guide slope 14 is provided at one end of the second body 12 away from the first body 11. By providing the guide slope 14, the limiting structure can enter the sample hole 54 more smoothly, effectively avoiding the problem that the second body 12 abuts against the top of the sample hole 54 and cannot enter, thereby improving the sample injection efficiency.

[0074] The above structure can ensure that the sample tube 100 does not come into contact with the wall of the injection hole during the injection process. Figure 1 As shown, the automatic sampling device provided in this embodiment also includes a sliding assembly 40, and the sliding assembly 40 includes a first linear slide 41, a second linear slide 42 and a third linear slide 43, whose output directions are respectively the first direction, the second direction and the third direction. The clamping member is arranged at the bottom end of the first linear slide 41 and can slide along the first direction. The first linear slide 41 is arranged at one end of the second linear slide 42, and the second linear slide 42 is slidably connected to the third linear slide 43. The second linear slide 42 can drive the clamping member to slide along the second direction, and the second linear slide 42 can slide along the third direction; the first direction is a vertical direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0075] This arrangement enables the clamp to slide in the first direction, the second direction and the third direction respectively, so as to ensure that the clamp can take out the sample tube 100 from the storage mechanism 30 and move it to the sample placement hole 54 of the resonator 50, or take out the sample tube 100 from the resonator 50 and place it in the storage mechanism 30; in addition, the sliding connection can also make the clamp clamping the sample tube 100 move more smoothly, thereby improving the injection efficiency. It should be noted here that, in this embodiment, the automatic injection device also includes a base 90, and the storage mechanism 30, the sliding assembly 40 and the resonator 50 are all arranged on the base 90. The base 90 can be detachably installed at a preset station. This arrangement can ensure the overall flatness, thereby ensuring the injection effect, and can also facilitate maintenance and replacement.

[0076] To ensure that the sample can be injected smoothly when no one is on duty, Figure 6As shown, a first detection member 70 is provided at the sample hole 54, and the first detection member 70 is used to detect whether a sample tube 100 is placed in the sample hole 54. This arrangement can ensure that when the first detection member 70 detects that a sample tube 100 is placed at the sample hole 54, the clamping member will not take or place the sample tube 100 in the sample hole 54 again, thereby ensuring that the sample tube 100 will not be placed twice in the sample hole 54, thereby improving the accuracy of unattended sampling.

[0077] To further ensure that the sample tube 100 can face the sample hole 54, Figure 5 and Figure 6 As shown, a second detection member 80 is provided at the lofting hole 54, a positioning portion 60 is provided on the clamping member, and an alignment site 61 is provided at the bottom end of the positioning portion 60. When the alignment site 61 is directly opposite to the second detection member 80, the sample tube 100 is directly opposite to the lofting hole 54, so that after the clamping member releases the sample tube 100, the sample tube can smoothly fall into the lofting hole 54. It should be noted here that a positioning portion 60 is provided at the bottom end of the clamping member, and a first spacing is formed between the positioning portion 60 and the clamping member, and a second spacing is also formed between the second detection member 80 and the lofting hole 54, and the first spacing is equal to the second spacing, so as to ensure that when the second detection member 80 is directly opposite to the alignment site 61, the sample tube 100 is also directly opposite to the lofting hole 54, so that accurate positioning can be completed, and the sample tube 100 can be ensured to fall into the lofting hole 54.

[0078] It is further explained that, in the present embodiment, the first detection member 70 and the second detection member 80 are both infrared distance measuring members, and the first detection member 70 is oriented toward the position above the lofting hole 54, and is used to detect whether there is a limit structure outside the lofting hole 54, so as to determine whether a sample tube 100 is placed in the lofting hole 54. In other embodiments, the first detection member 70 may also be a proximity switch, and no other limitation is made in the present embodiment. In addition, when the alignment site 61 and the second detection member 80 are facing each other, a first characteristic distance h0 can be formed between the two, that is, when the second detection member 80 detects that the spacing h=h0 between it and the positioning portion, it can automatically determine that the alignment site 61 and the second detection member 80 are facing each other, and the corresponding sample tube 100 is facing the lofting hole 54 at this time. At this time, after the clamp releases the sample tube 100, the sample tube 100 can automatically fall into the lofting hole 54, and the principle is simple and convenient.

[0079] It should be noted here that the characteristic distance refers to when the clamping member is located at a specific height of the first linear slide rail 41 (the height after sampling and resetting from the storage mechanism 30). Only when the alignment site 61 is located above the second detection member 80, the distance measured by the second detection member 80 (the distance between its site 61 and the second detection member 80) is the distance h0. At any other position of the clamping member and after the clamping member is removed, the distance between the obstacle above the second detection member 80 and the second detection member 80 is not the distance h0.

[0080] However, in the case of no one on duty, how to quickly make the alignment point 61 and the second detection member 80 face each other becomes a difficult problem to be solved. Figure 5 As shown, an indication position point is provided on the positioning portion 60, and the indication position point is used to indicate the azimuth relationship between the position directly facing the second detection member 80 and the alignment position 61, and a second characteristic distance (which is different from the first characteristic distance h0) can be formed between the indication position point and the second detection member 80. By setting the indication position point, the positional relationship between the second detection member 80 and the alignment position 61 can be automatically determined under unattended conditions, so that the clamping member can be moved toward the alignment position and the second detection member 80 until the second detection member 80 can detect the first characteristic distance h0, thereby completing the alignment.

[0081] To further facilitate adjustment, multiple indicator sites are provided, and the multiple indicator sites are distributed around the periphery of the alignment site 61, and the multiple indicator sites can form different second characteristic distances with the second detection member 80. This arrangement facilitates judging that the facing position of the second detection member 80 is located in a certain direction of the alignment site 61, and then the positioning part is moved in the opposite direction according to the direction, so that the alignment site 61 faces the second detection member 80.

[0082] Furthermore, there are four indication sites (a first indication mark 62, a second indication mark 63, a third indication mark 64 and a fourth indication mark 65, which can respectively correspond to the second characteristic distances of h1, h2, h3 and h4 with the second detection member 80), and these four indication sites are arranged in pairs along the second direction and the third direction, that is, the first indication mark 62, the second indication mark 63, the third indication mark 64 and the fourth indication mark 65 are arranged in an array on the periphery of the alignment site 61. When the second detection member 80 detects that the distance between it and the positioning portion is h1, the front side is directly opposite to the first indication mark 62. At this time, it can first move along the second direction close to the alignment site 61, and then move along the third direction close to the alignment site 61, until the alignment site 61 is aligned with the second detection member 80 and stops.

[0083] The positioning portion 60 on the clamping member is also provided with a distance mark 66, which is a rectangle (it can also be set as a square) and can have a third characteristic distance (h5) with the second detection member 80, and the side of the distance mark 66 is parallel to the second direction or the third direction; the alignment site 61 is located at the center of the distance mark 66, and the line passing through the alignment site 61 and parallel to the second direction or the third direction divides the position inside the distance mark 66 into four parts, and the four parts correspond to the four indication sites respectively. Correspondingly, in this structure, the first positioning mark 62, the second positioning mark 63, the third positioning mark 64 and the fourth positioning mark 65 are all squares (the side length is d). When the clamping member moves to the top of the second detecting member 80 at the first speed v1, the second detecting member 80 detects that the distance between it and the positioning portion 60 is the second characteristic distance (taking h1 as an example), and at this time it is facing the first positioning mark 62, and at this time it moves to the left along the third direction at the second speed v2, and stops immediately after the distance detected by the second detecting member 80 changes from h1 to h5. At this time, the second detecting member 80 is facing the junction of the first indication mark 62 and the left distance mark 66, and at this time it moves to the right along the third direction by a distance d (the side length of the first indication mark 62), and at this time the second detecting member 80 is facing the first indication mark 62 and The second indicator mark 63 is located at the junction; then it moves upward in the second direction at a second speed v2, and stops immediately after the distance detected by the second detection member 80 changes from h1 to h5. At this time, the second detection member 80 is facing the junction of the first indicator mark 62 and the upper distance mark 66. At this time, it moves downward in the second direction by a distance d (the side length of the first indicator mark 62), which can ensure that the second detection member 80 is just facing the alignment point 61, and the distance between the two is just h0. At this time, the clamping member is just above the sample hole 54. The clamping member is released, and the sample tube 100 can fall smoothly into the sample hole 54 under the action of gravity. The operation process is simple and convenient. Even when there is no personnel on duty, the sample tube 100 can be quickly and accurately aligned with the sample hole 54, thereby improving work efficiency.

[0084] In addition, if Figure 1 and Figure 3 As shown, a protective shell 53 is provided on the resonator 50, and the sample hole 54, the first detection member 70 and the second detection member 80 are all provided in the protective shell 53, so as to extend the service life thereof.

[0085] This embodiment also provides an automatic sampling method, which comprises the following steps:

[0086] S100, the clamping member selects a sample tube 100 from the storage mechanism 30, clamps the limiting structure, and takes out the sample tube 100 from the storage mechanism 30;

[0087] S200, making the clamping member slide along the first, second and third directions, and driving the sample tube 100 to move above the injection hole;

[0088] S300. According to the detection distance h of the second detection member 80, the clamping member is driven along the third direction away from the alignment site 61, so that the detection distance h of the second detection member 80 is exactly equal to h5. At this time, the clamping member is driven along the third direction toward the alignment site 61 and moved a distance d. Then, the clamping member is driven along the second direction away from the alignment site 61, so that the detection distance h of the second detection member 80 is exactly equal to h. At this time, the clamping member is driven along the second direction toward the alignment site 61 and moved a distance d, so that the alignment site 61 is directly opposite to the second detection member 80 (the distance between the two is h0).

[0089] S400 , after the alignment site 61 is aligned with the second detection member 80 , the clamping member releases the limiting structure to allow the sample tube 100 to fall into the sample placement hole 54 .

[0090] In addition, the automatic sampling method also includes the following steps:

[0091] S500, detecting whether the sample tube 100 is in the first state (normal state) or the second state (abnormal state):

[0092] S502, when the sample tube 100 is in the first state (normal state), start sampling;

[0093] S503, when the sample tube 100 is in the second state (abnormal state), the clamping member takes out the sample tube 100 from the sample placement hole 54, puts the sample tube 100 back into the storage mechanism 30, and repeats the above steps S100 to S400 to reload another sample tube 100.

[0094] In addition, step S500 further includes:

[0095] S501, the resonator 50 tunes the sample tube 100. When the sample tube 100 can complete the tuning, the sample tube 100 is in a first state (normal state). When the sample tube 100 fails to complete the tuning, the sample tube 100 is in a second state (abnormal state).

[0096] The corresponding step S501 also includes:

[0097] S5011, the tuning motor of the resonator 50 can drive the tuning rod to complete the preset stroke and reach the critical coupling state, and the sample tube 100 can complete the tuning;

[0098] S5011, the tuning motor of the resonator 50 cannot drive the tuning rod to complete the preset stroke, and the critical coupling state is not reached, and the sample tube 100 is not tuned.

[0099] It should be noted here that the values ​​generated during the tuning process can form a tuning curve. When all the values ​​of the tuning curve are less than the set threshold, the sample tube 100 reaches the critical coupling state.

[0100] In summary, operating the automatic sampling device according to the automatic sampling method in this embodiment can quickly, efficiently and accurately complete the sampling of the sample tube 100 without human supervision, while ensuring that the sample tube 100 will not collide with the injection hole.

[0101] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A limiting structure, arranged at one end of a sample tube (100), wherein a clamping member can clamp the limiting structure and place the sample tube (100) in a sample placement hole (54), characterized in that: include: The main body (10) is coaxially arranged on the outer periphery of the sample tube (100). The main body (10) comprises a first main body (11) and a second main body (12) which are connected in sequence. The diameter of the first main body (11) is larger than the diameter of the second main body (12). The diameter of the second main body (12) is larger than the outer diameter of the sample tube (100). Under the action of gravity, the limiting structure can fall vertically downward into the sample hole (54) together with the sample tube (100). A contact inclined surface (13) is provided at the connection between the first main body (11) and the second main body (12). When the main body (10) is placed in the sample hole (54), the contact inclined surface (13) can contact the limiting step of the sample hole (54).

2. The limiting structure according to claim 1, characterized in that: The limiting structure is made of a rigid material, and the outer periphery of the limiting structure is coated with a lubricating coating.

3. The limiting structure according to claim 1, characterized in that: The distance between the end of the first body (11) away from the second body (12) and the abutting inclined surface (13) is greater than the distance between the limiting step and the top of the lofting hole (54).

4. The limiting structure according to claim 3, characterized in that: A hanging portion (20) is provided at one end of the first body (11) away from the second body (12); when the abutting inclined surface (13) abuts against the limiting step of the lofting hole (54), the hanging portion (20) can abut against the outer periphery of the top end of the lofting hole (54).

5. The limiting structure according to any one of claims 1 to 4, characterized in that: A guiding inclined surface (14) is provided at one end of the second body (12) away from the first body (11).

6. An automatic sampling device, characterized in that: The invention comprises a storage mechanism (30), a resonator (50), a clamping member and a limiting structure as described in any one of claims 1 to 5; the storage mechanism (30) is used to store the sample tube (100), the sample tube (100) is provided with the limiting structure, the resonator (50) is provided with the sample hole (54), and the clamping member can clamp the limiting structure and place the sample tube (100) in the sample hole (54).

7. The automatic sampling device according to claim 6, characterized in that: The automatic sampling device also includes a sliding assembly (40), the sliding assembly (40) includes a first linear slide rail (41), a second linear slide rail (42) and a third linear slide rail (43), the output directions of which are respectively a first direction, a second direction and a third direction; the clamping member is arranged at the bottom end of the first linear slide rail (41) and can slide along the first direction; the first linear slide rail (41) is arranged at one end of the second linear slide rail (42); the second linear slide rail (42) is slidably connected to the third linear slide rail (43); the second linear slide rail (42) can drive the clamping member to slide along the second direction; the second linear slide rail (42) can slide along the third direction; the first direction is a vertical direction; the first direction, the second direction and the third direction are perpendicular to each other.

8. The automatic sampling device according to claim 6, characterized in that: A first detection component (70) is provided at the sample placement hole (54), and the first detection component (70) is used to detect whether the sample tube (100) is placed in the sample placement hole (54).

9. The automatic sampling device according to claim 7, characterized in that: A second detection member (80) is arranged at the sample hole (54), a positioning portion (60) is arranged on the clamping member, and an alignment point (61) is arranged at the bottom end of the positioning portion (60). When the alignment point (61) is directly opposite to the second detection member (80), the sample tube (100) is directly opposite to the sample hole (54), so that after the clamping member releases the sample tube (100), the sample tube (100) falls into the sample hole (54).

10. The automatic sampling device according to claim 9, characterized in that: The second detection element (80) is a distance measuring device, and a first characteristic distance can be formed between the alignment point (61) and the second detection element (80).

11. The automatic sampling device according to claim 10, characterized in that: An indication point is provided on the positioning portion (60), and the indication point is used to indicate the azimuth relationship between the position directly facing the second detection member (80) and the alignment point (61), and a second characteristic distance can be formed between the indication point and the second detection member (80).

12. The automatic sampling device according to claim 11, characterized in that: There are a plurality of indication sites, and the plurality of indication sites are distributed around the alignment site (61), and the plurality of indication sites can respectively form different second characteristic distances with the second detection element (80).

13. The automatic sampling device according to claim 12, characterized in that: There are four indicator sites, and the four indicator sites are arranged in pairs along the second direction and the third direction.

14. The automatic sampling device according to claim 13, characterized in that: The clamping member is provided with a distance mark (66), the distance mark (66) is rectangular and can have a third characteristic distance with the second detection member (80), and the side of the distance mark (66) is parallel to the second direction or the third direction; The alignment site (61) is located at the center of the distance mark (66), and a line passing through the alignment site (61) and parallel to the second direction or the third direction divides the position inside the distance mark (66) into four parts, and the four parts correspond to the four indicator sites respectively.

15. An automatic sampling method, characterized in that: Based on the automatic sampling device according to any one of claims 9 to 14, the automatic sampling method comprises the following steps: S100, the clamping member clamps the limiting structure to take out the sample tube (100) from the storage mechanism (30); S200, the clamping member drives the sample tube (100) to move above the sample placement hole (54); S300, driving the clamping member along the second direction and the third direction so that the alignment point (61) is directly opposite to the second detection member (80); S400: After the alignment site (61) is aligned with the second detection member (80), the clamping member releases the limiting structure to allow the sample tube (100) to fall into the sample placement hole (54).

16. The automatic sampling method according to claim 15, characterized in that: The automatic sampling method also includes the following steps: S500, detecting whether the sample tube (100) is in the first state or the second state: S502, starting sample testing when the sample tube (100) is in the first state; S503, when the sample tube (100) is in the second state, the clamping member takes out the sample tube (100) from the sample placement hole (54), puts the sample tube (100) back into the storage mechanism (30), and repeats the above steps S100 to S400 to reload another sample tube (100).

17. The automatic sampling method according to claim 16, characterized in that: The step S500 further includes the following steps: S501. The resonator (50) tunes the sample tube (100). When the sample tube (100) is able to complete the tuning, the sample tube (100) is in the first state. When the sample tube (100) is not able to complete the tuning, the sample tube (100) is in the second state.

18. The automatic sampling method according to claim 17, characterized in that: The step S501 includes: S5011, the tuning motor of the resonator (50) can drive the tuning rod to complete a preset stroke and reach a critical coupling state, and the sample tube (100) can complete tuning; S5011: The tuning motor of the resonator (50) is unable to drive the tuning rod to complete the preset stroke and has not reached the critical coupling state, and the sample tube (100) has not completed tuning.

19. The automatic sampling method according to claim 18, characterized in that: The values ​​generated during the tuning process can form a tuning curve. When all the values ​​of the tuning curve are less than a set threshold, the sample tube (100) reaches the critical coupling state.

Images