Chromatographic detection ultraviolet radiation device

Abstract

The utility model discloses a chromatographic detection ultraviolet radiation device, and relates to the technical field of liquid chromatographs. The utility model provides a chromatographic detection ultraviolet irradiation device. The chromatographic detection ultraviolet irradiation device comprises an irradiation device body; the irradiation device body is arranged on the supporting piece; the driving ring is rotatably arranged on the supporting piece, and the periphery of the irradiation device body is sleeved with the driving ring; one end of the guide cylinder is hinged to the driving ring, the other end of the guide cylinder is a free end, a cooling fan is arranged at the free end of the guide cylinder, a reset spring is arranged between the outer wall of the side, close to the irradiation device body, of the guide cylinder and the driving ring, and a guide ring located on the periphery of the irradiation device body is further arranged on the supporting piece. The guide ring is provided with a guide face used for abutting against the outer wall of the guide cylinder, and when the driving ring rotates, the guide ring drives the guide cylinder to swing along the hinged position of the guide cylinder, so that airflow formed by the cooling fan can be sprayed to different positions on the irradiation device body.

Description

Technical Field

[0001] The present application relates to the technical field of liquid chromatographs, and in particular to a chromatographic detection ultraviolet irradiation device. Background Art

[0002] With the continuous development of science and technology, liquid chromatography detection technology has been widely used in many fields such as chemistry, biology, and medicine. Among them, the ultraviolet irradiation device is one of the key components of the chromatography detection system, and its performance directly affects the accuracy and reliability of the detection results. However, in practical applications, it is not difficult to find that many existing chromatography detection ultraviolet irradiation devices have obvious deficiencies in heat dissipation, which has become a key factor restricting their performance improvement and expansion of application scope.

[0003] From the working principle point of view, the UV irradiation device emits ultraviolet rays of a specific wavelength to excite specific molecules or ions in the sample, causing them to produce fluorescence or absorption spectra, thereby realizing the detection of target substances in the sample. However, during the UV irradiation process, a large amount of heat will be generated inside the device. If the heat cannot be dissipated in a timely and effective manner, the temperature inside the device will rise, which will in turn affect key indicators such as the stability of the UV light source, the uniformity of the light intensity distribution, and the detection sensitivity.

[0004] With the continuous development of detection technology, the performance requirements for ultraviolet irradiation devices are getting higher and higher. For example, in high-performance liquid chromatography detection, it is necessary to achieve fast, accurate, and highly sensitive detection, which requires ultraviolet irradiation devices to have higher stability and reliability. However, due to poor heat dissipation, traditional ultraviolet irradiation devices are prone to performance degradation and poor stability under long-term high-load operation, which seriously affects the accuracy and reliability of the test results.

[0005] Therefore, developing a chromatographic detection ultraviolet irradiation device with good heat dissipation effect and stable and reliable performance has important practical significance and application value. Utility Model Content

[0006] The main purpose of the present application is to provide a chromatographic detection ultraviolet irradiation device, aiming to solve the technical problem that the ultraviolet irradiation device in the prior art has poor heat dissipation effect, resulting in increased internal temperature, affecting the stability of the ultraviolet light source and the uniformity of light intensity distribution.

[0007] To achieve the above-mentioned purpose, the present application provides a chromatographic detection ultraviolet irradiation device, comprising: an irradiation device body; a support member, the irradiation device body is arranged on the support member; a driving ring, which is rotatably arranged on the support member, and the driving ring is sleeved on the periphery of the irradiation device body; a guide tube, one end of which is hingedly arranged on the driving ring and the other end is a free end, the free end of the guide tube is provided with a heat dissipation fan, a return spring is provided between the outer wall of the guide tube on one side close to the irradiation device body and the driving ring, and a guide ring located on the periphery of the irradiation device body is also provided on the support member, the guide ring has a guide surface for abutting against the outer wall of the guide tube, and when the driving ring rotates, the guide ring drives the guide tube to swing along its hinge so that the airflow formed by the heat dissipation fan can be sprayed to different positions on the irradiation device body.

[0008] Optionally, the support member includes a first support plate and a second support plate, a sandwich space is formed between the first support plate and the second support plate, the irradiation device body is arranged on the first support plate, the first support plate is provided with an annular slide groove located at the periphery of the irradiation device body, and at least three limiting balls are arranged in the sandwich space, each of the limiting balls is connected to the driving ring through a connecting rod, and the connecting rod passes through the slide groove.

[0009] Optionally, the outer diameter of the limiting ball is greater than the width of the sliding groove.

[0010] Optionally, the first support plate and the second support plate are connected by a bolt assembly.

[0011] Optionally, a side wall of the driving ring is provided with an annular gear ring, a motor is provided on the supporting member, a driving wheel is sleeved on the output shaft of the motor, and the driving wheel is meshed with the gear ring.

[0012] Optionally, a positioning plate is provided at the upper end of the driving ring, two side guard plates are provided at the upper end of the positioning plate, a rotating shaft passing through radially is provided at the lower end of the guide tube, both ends of the rotating shaft are respectively rotatably connected to the side guard plates, and the upper end of the guide tube is the free end.

[0013] Optionally, a baffle is provided on a side of the guide tube close to the irradiation device body, and the return spring is located between the baffle and the positioning plate.

[0014] Optionally, a positioning ring is provided on the support member, a positioning flange is provided on the inner wall of the upper end of the positioning ring, the upper end of the guide ring is connected to the positioning flange, and the lower end of the guide ring is configured as the guide surface.

[0015] Optionally, the axis of the guide ring is colinear with the axis of the drive ring.

[0016] Optionally, the cross-sectional shape of the guide surface is a shape in which crests and troughs extend alternately.

[0017] Beneficial effects that this application can achieve:

[0018] A chromatographic detection ultraviolet irradiation device proposed in an embodiment of the present application is a device in which a guide tube that can rotate around the irradiation device body is arranged on the periphery of the irradiation device body, and a heat dissipation fan is arranged on the guide tube. The heat dissipation fan can spray airflow to the irradiation device body, thereby increasing the air flow speed around the irradiation device body and cooling the irradiation device body. A guide ring is arranged on the support member, and the guide ring has a guide surface. During the process that the guide tube rotates with the driving ring, the guide ring drives the guide tube to swing around the hinge, thereby realizing the swing of the heat dissipation fan relative to the irradiation device body. The airflow formed by the heat dissipation fan can be sprayed to different parts of the irradiation device body, and the airflow formed by the heat dissipation fan can play a role of turbulence, thereby further increasing the air flow speed and improving the heat dissipation efficiency of the irradiation device body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front cross-sectional structure of the ultraviolet irradiation device according to an embodiment of the present application;

[0020] Figure 2 It is a schematic diagram of the top view of the structure of the ultraviolet irradiation device according to an embodiment of the present application.

[0021] In the figure: 10-irradiation device body, 20-support member, 21-first support plate, 22-second support plate, 23-bolt assembly, 30-drive ring, 31-gear ring, 32-limiting ball, 33-connecting rod, 331-slide groove, 40-drive wheel, 41-motor, 50-guide tube, 51-cooling fan, 60-positioning plate, 61-side guard plate, 62-rotating shaft, 63-reset spring, 64-baffle, 70-positioning ring, 71-positioning flange, 80-guide ring, 81-guide surface.

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0027] Example 1

[0028] Reference Figure 1 and Figure 2The first embodiment of the present application provides a chromatographic detection ultraviolet irradiation device, comprising: an irradiation device body 10, a support member 20 and a drive ring 30. The irradiation device body 10 is arranged on the support member 20; the drive ring 30 is rotatably arranged on the support member 20, and the drive ring 30 is sleeved on the periphery of the irradiation device body 10; one end of the guide tube 50 is hingedly arranged on the drive ring 30, and the other end of the guide tube 50 is a free end. A heat dissipation fan 51 is arranged on the free end of the guide tube 50, and a return spring 63 is arranged between the outer wall of the guide tube 50 on one side close to the irradiation device body 10 and the drive ring 30. A guide ring 80 is also arranged on the support member 20 and is located on the periphery of the irradiation device body 10. The guide ring 80 has a guide surface 81 for abutting against the outer wall of the guide tube 50. When the drive ring 30 rotates, the guide ring 80 drives the guide tube 50 to swing along its hinge, so that the airflow formed by the heat dissipation fan 51 can be sprayed to different positions on the irradiation device body 10.

[0029] In this embodiment, one end of the irradiation device body 10 is fixed on the support 20, and a power supply, an ultraviolet light source, a signal processing module, etc. can be arranged inside the irradiation device body 10. A rotatable driving ring 30 is arranged on the support 20, and the driving ring 30 is located at the periphery of the irradiation device body 10. The driving ring 30 can rotate around its axis. During the rotation of the driving ring 30, the guide tube 50 arranged on the driving ring 30 rotates synchronously around the irradiation device body 10, and the airflow formed by the heat dissipation fan 51 on the guide tube 50 can be directly sprayed to different circumferential positions of the irradiation device body 10, thereby improving the heat dissipation effect of the irradiation device body 10. Furthermore, by providing a guide ring 80 on the support member 20, the guide ring 80 has a guide surface 81. When the driving ring 30 drives the guide tube 50 to rotate, the outer wall of the guide tube 50 can contact the guide ring 80 at different positions. Since the guide surface 81 is not a horizontal plane, the guide tube 50 can move around its hinge, and cooperate with the reset spring 63 to realize the swing of the guide tube 50 around the hinge, so that the airflow sprayed by the heat dissipation fan 51 can be directly sprayed to different positions of the irradiation device body 10 along the length direction, further increasing the area that the airflow sprayed by the heat dissipation fan can cover, and improving the heat dissipation effect of the heat dissipation fan 51 on the irradiation device body 10. Moreover, when the guide tube 50 is swinging, the airflow formed from the heat dissipation fan 51 is sprayed onto the irradiation device body 10, and the sprayed airflow can play a turbulent role to a certain extent, thereby increasing the air flow speed near the irradiation device body 10, and improving the heat exchange efficiency between the irradiation device body 10 and the air, so that the high temperature near the irradiation device body 10 can be dissipated in time to a space far away from the irradiation device body 10, so that the irradiation device body 10 can be in a relatively low temperature environment.

[0030] The irradiation device body of this embodiment is used for the ultraviolet detector. The working principle of the ultraviolet detector is: the ultraviolet detector converts the ultraviolet light absorbed by the sample into an electrical signal, and detects and records it after amplification and processing, so as to realize the quantitative and qualitative analysis of the substance in the sample. During use, the sample solution is introduced into the optical pool by some means (such as injection or injection). The ultraviolet light source on the irradiation device body emits a beam of ultraviolet light in the optical pool, usually within the range of ultraviolet-visible light (UV-Vis), that is, between 200 and 400 nanometers in wavelength. When the ultraviolet light passes through the sample solution, the molecules in the solution can absorb the light. The degree of absorption depends on the chemical properties and concentration of the molecules.

[0031] Example 2

[0032] As an optional implementation, refer to Figure 1 The present embodiment provides a specific structure of a support member 20, including: the support member 20 includes a first support plate 21 and a second support plate 22, a sandwich space is formed between the first support plate 21 and the second support plate 22, the irradiation device body 10 is arranged on the first support plate 21, the first support plate 21 is provided with an annular slide groove 331 located at the periphery of the irradiation device body 10, at least three limiting balls 32 are arranged in the sandwich space, each limiting ball 32 is connected to the driving ring 30 through a connecting rod 33, and the connecting rod 33 passes through the slide groove 331.

[0033] Optionally, the outer diameter of the limiting ball 32 is greater than the width of the sliding groove 331 .

[0034] Optionally, the first support plate 21 and the second support plate 22 are connected by a bolt assembly 23 .

[0035] In this embodiment, the limiting ball 32, the connecting rod 33 and the driving ring 30 form a whole. By limiting the size relationship between the limiting ball 32 and the slide groove 331, the limiting ball 32 will not be separated from the support member 20 through the slide groove 331. An interlayer space is formed between the first support plate 21 and the second support plate 22. The limiting ball 32 is located in the limiting space, which plays a limiting role on the whole formed by the limiting ball 32, the connecting rod 33 and the driving ring 30, so that the driving ring 30 can rotate relative to the support member 20, and the driving ring 30 will not be separated from the support member 20, so that the ultraviolet irradiation device of this embodiment can be placed horizontally on the workbench, can also be installed on the side wall of the workbench in a vertical horizontal plane, and can also be suspended on the ceiling or the gantry, so that the support member 20 can adapt to different working environments and improve its application range. The first support plate 21 and the second support plate 22 are connected by a bolt assembly 23, which is convenient for controlling the height of the interlayer space formed between the first support plate 21 and the second support plate 22 by controlling the length of the screw. The first support plate 21 is divided into two independent parts by the annular slide groove 331. The two independent parts can be connected to the first support through the bolt assembly 23 respectively, thereby improving the structural stability of the first support plate 21 and the second support plate 22 as a whole.

[0036] Example 3

[0037] As an optional implementation, refer to Figure 1 and Figure 2 This embodiment provides a specific structure for controlling the rotation of the driving ring 30, including: a ring-shaped gear ring 31 is provided on the side wall of the driving ring 30, a motor 41 is provided on the support member 20, a driving wheel 40 is sleeved on the output shaft of the motor 41, and the driving wheel 40 is meshed with the gear ring 31.

[0038] In this embodiment, an annular gear ring 31 is provided on the inner side wall of the driving ring 30, a motor 41 is provided on the supporting member 20, and an output shaft sleeve of the motor 41 is provided with a driving wheel 40 meshing with the gear ring 31. When the motor 41 is working, the output shaft of the motor 41 rotates, driving the driving wheel 40 to rotate, and the driving wheel 40 drives the gear ring 31 to rotate. The driving wheel 40 is provided at the upper end of the first supporting plate 21, the motor 41 is provided at the lower end of the second supporting plate 22 or provided in the interlayer space, and the output shaft of the motor 41 passes through the first supporting plate 21 or passes through the first supporting plate 21 and the second supporting plate 22 at the same time.

[0039] Example 4

[0040] As an optional implementation, refer to Figure 1 and Figure 2The present embodiment provides a specific installation structure for installing the guide tube 50 on the driving ring 30, including: a positioning plate 60 is provided at the upper end of the driving ring 30, two side guard plates 61 are provided at the upper end of the positioning plate 60, a rotating shaft 62 penetrating in the radial direction is provided at the lower end of the guide tube 50, and both ends of the rotating shaft 62 are rotatably connected to the side guard plates 61 respectively, and the upper end of the guide tube 50 is a free end.

[0041] Optionally, a baffle 64 is provided on one side of the guide tube 50 close to the irradiation device body 10 , and the return spring 63 is located between the baffle 64 and the positioning plate 60 .

[0042] In this embodiment, the positioning plate 60 can be installed to the upper end of the driving ring 30 by welding or bonding or by screw connection. It should be noted that the figure only provides a schematic diagram when installing one guide tube 50, and multiple guide tubes 50 distributed circumferentially can be arranged on the driving ring 30. By setting the positioning plate 60, the installation space of the guide tube 50 is increased. Two side guard plates 61 are arranged on the positioning plate 60, and the spacing between the two side guard plates 61 is greater than the outer diameter width of the guide tube 50. The lower end of the guide tube 50 is connected to the two side guard plates 61 through a rotating shaft 62, and the axis of the rotating shaft 62 is orthogonal to the axis of the driving ring 30. In the process of the free end of the guide tube 50 turning around the axis of the rotating shaft 62, the heat dissipation fan 51 of the guide tube 50 always points to the irradiation device body 10. By setting a baffle 64 on the outer wall of the guide tube 50, the baffle 64 cooperates with the positioning plate 60, which can play a certain limiting role on the reset spring 63 and reduce the probability of the reset spring 63 detaching from the guide tube 50.

[0043] Example 5

[0044] As an optional implementation, refer to Figure 1 and Figure 2 , it should be noted that Figure 2 In order to facilitate observation of the positioning plate 60 and the rotating shaft 62, the positioning flange 71 and the guide ring 80 are not shown. This embodiment provides a specific method for connecting the guide ring 80 with the support member 20, including: the support member 20 is provided with a positioning ring 70, the inner wall of the upper end of the positioning ring 70 is provided with a positioning flange 71, the upper end of the guide ring 80 is connected to the positioning flange 71, and the lower end of the guide ring 80 is configured as a guide surface 81.

[0045] In this embodiment, the lower end of the positioning ring 70 is connected to the first support plate 21, and the positioning flange 71 is provided on the inner wall of the upper end of the positioning ring 70, so that the guide ring 80 can avoid the positioning plate 60 and other structures and be located above the guide tube 50. The upper end of the guide ring 80 contacts the positioning flange 71, and the lower end of the guide ring 80 is a free end. The lower end of the guide ring 80 is constructed as a guide surface 81, and the guide surface 81 contacts the outer wall of the guide tube 50 in an inclined state. The cooperation between the guide ring 80 and the return spring 63 can maintain the inclined state of the guide tube 50. When the guide tube 50 contacts the guide surface 81 of the guide ring 80 at different positions, the return spring 63 allows the outer wall of the guide tube 50 to always contact the guide surface 81, so that the position of the guide tube 50 can change with the fluctuation of the guide surface 81.

[0046] Example 6

[0047] As an optional implementation, refer to Figure 1 This embodiment provides a specific structure of a guide ring 80 , including: the axis of the guide ring 80 is colinear with the axis of the drive ring 30 .

[0048] In this embodiment, the positions of the guide ring 80 and the drive ring 30 are limited so that the position of the rotating shaft 62 relative to the guide ring 80 will not change when the guide tube 50 follows the drive ring 30 to rotate. The axial relative movement is not reduced when the guide ring 80 drives the guide tube 50 to swing, thereby improving the stability of the drive ring 30 driving the guide tube 50 to swing.

[0049] Example 7

[0050] As an optional implementation, refer to Figure 1 This embodiment provides a specific structure of a guide surface 81 of a guide ring 80, including: a cross-sectional shape of the guide surface 81 showing wave crests and wave troughs extending alternately.

[0051] In this embodiment, the guide surface 81 extends in an undulating annular shape. For ease of understanding, specific parameters are used as an example. When the outer wall of the guide tube 50 contacts the wave crest of the guide surface 81, the angle between the axis of the guide tube 50 and the horizontal plane is 40°. When the outer wall of the guide tube 50 contacts the wave trough of the guide surface 81, the angle between the axis of the guide tube 50 and the horizontal plane is 60°. When the guide tube 50 rotates around the irradiation device body 10 following the drive ring 30, the guide tube 50 repeatedly transitions from wave crest to wave trough and then from wave trough to wave crest, so that the guide tube 50 is in a reciprocating swinging state. When the guide tube 50 is in a reciprocating swinging state, the heat dissipation fan 51 provided at the free end of the guide tube 50 can spray airflow at different positions of the irradiation device to cool down.

[0052] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A chromatographic detection ultraviolet irradiation device, characterized in that: include: The body of the irradiation device; A support member, on which the irradiation device body is arranged; A driving ring, which is rotatably disposed on the supporting member, and the driving ring is sleeved on the periphery of the irradiation device body; A guide tube, one end of which is hingedly arranged on the driving ring and the other end is a free end, a heat dissipation fan is arranged at the free end of the guide tube, a return spring is arranged between the outer wall of the guide tube on one side close to the irradiation device body and the driving ring, and the support member is also provided with a guide ring located at the periphery of the irradiation device body, the guide ring has a guide surface for abutting against the outer wall of the guide tube, when the driving ring rotates, the guide ring drives the guide tube to swing along its hinge, so that the airflow formed by the heat dissipation fan can be sprayed to different positions on the irradiation device body.

2. The chromatographic detection ultraviolet irradiation device according to claim 1, characterized in that: The support member includes a first support plate and a second support plate, a sandwich space is formed between the first support plate and the second support plate, the irradiation device body is arranged on the first support plate, the first support plate is provided with an annular slide groove located at the periphery of the irradiation device body, at least three limiting balls are arranged in the sandwich space, each of the limiting balls is connected to the driving ring through a connecting rod, and the connecting rod passes through the slide groove.

3. The chromatographic detection ultraviolet irradiation device according to claim 2, characterized in that: The outer diameter of the limiting ball is greater than the width of the sliding groove.

4. The chromatographic detection ultraviolet irradiation device according to claim 2, characterized in that: The first support plate and the second support plate are connected by a bolt assembly.

5. The chromatographic detection ultraviolet irradiation device according to claim 1, characterized in that: The side wall of the driving ring is provided with an annular gear ring, the supporting member is provided with a motor, the output shaft of the motor is sleeved with a driving wheel, and the driving wheel is meshed with the gear ring.

6. The chromatographic detection ultraviolet irradiation device according to claim 1, characterized in that: A positioning plate is arranged at the upper end of the driving ring, two side guard plates are arranged at the upper end of the positioning plate, a rotating shaft penetrating radially is arranged at the lower end of the guide tube, both ends of the rotating shaft are rotatably connected to the side guard plates respectively, and the upper end of the guide tube is the free end.

7. The chromatographic detection ultraviolet irradiation device according to claim 6, characterized in that: A baffle is provided on one side of the guide tube close to the irradiation device body, and the return spring is located between the baffle and the positioning plate.

8. The chromatographic detection ultraviolet irradiation device according to claim 1, characterized in that: A positioning ring is arranged on the support member, a positioning flange is arranged on the inner wall of the upper end of the positioning ring, the upper end of the guide ring is connected to the positioning flange, and the lower end of the guide ring is configured as the guide surface.

9. The chromatographic detection ultraviolet irradiation device according to claim 1, characterized in that: The axis of the guide ring is colinear with the axis of the drive ring.

10. The chromatographic detection ultraviolet irradiation device according to claim 1, characterized in that: The cross-sectional shape of the guide surface is in the form of wave crests and wave troughs extending alternately.

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