Liquid chromatography-mass spectrometer for detecting veterinary drug residues

Abstract

The invention relates to the technical field of liquid chromatography-mass spectrometry instruments, and discloses a liquid chromatography-mass spectrometry instrument for veterinary drug residue detection, the liquid chromatography-mass spectrometry instrument for veterinary drug residue detection is characterized in that a heat dissipation protection assembly is arranged outside a liquid chromatography-mass spectrometry instrument body, and a refrigeration module is connected with two air supply pipes respectively; the two groups of rotating plates can form a protective door on the front side of the liquid chromatograph-mass spectrometer body through structure and position conversion, and a plurality of air supply nets are arranged on one side, close to the liquid chromatograph-mass spectrometer body, of the heat dissipation cover. According to the liquid chromatograph-mass spectrometer for veterinary drug residue detection, the heat dissipation protection assembly can perform directional and uniform air-cooling heat dissipation and cooling on the side wall of the liquid chromatograph-mass spectrometer body when the liquid chromatograph-mass spectrometer body works, so that the liquid chromatograph-mass spectrometer body is prevented from being damaged due to overheating, and the service life of the liquid chromatograph-mass spectrometer body is ensured; a protective cover outside the liquid chromatograph-mass spectrometer body can be formed, so that the liquid chromatograph-mass spectrometer body is prevented from being touched by mistake and dust, and the use protection performance of the liquid chromatograph-mass spectrometer body is improved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid spectrometer-mass spectrometer, in particular to a liquid spectrometer-mass spectrometer for detecting veterinary drug residues. Background Art

[0002] Liquid chromatography-mass spectrometry is an analytical technology that combines liquid chromatography and mass spectrometry. The working principle of liquid chromatography-mass spectrometry is as follows: the components of the sample separated by liquid chromatography enter the mass spectrometer detector in turn, and each component is ionized in the ion source to produce ions with a certain charge and different mass numbers. Different ions have different movement behaviors in the electromagnetic field. The mass analyzer is used to separate the ions according to different mass-to-charge ratios to obtain a mass spectrum arranged in order of mass-to-charge ratio.

[0003] Liquid spectrometry is mainly used in drug metabolism and pharmacokinetic research, clinical pharmacology research, natural drug development research, neonatal screening, protein and peptide identification, residue analysis, toxicology analysis, environmental analysis, etc. For example, in food safety supervision, the "Limits of Veterinary Drug Residues in Foods" (GB 31650-2019) stipulates the maximum allowable limits of veterinary drug residues in various types of food. For example, the limit of ofloxacin in lean meat is 0.1 mg / kg. By detecting veterinary drug residues in meat products, it can be ensured that animal food does not contain excessive drug residues, thereby ensuring the food safety of meat products and protecting human health.

[0004] During the operation of the liquid spectrometer, a large amount of heat is generated. If the instrument is in a high-temperature working environment for a long time, the aging of the electronic components inside the instrument will be accelerated and its service life will be shortened. The high temperature environment will also affect the detection accuracy and sensitivity of the instrument. At present, the heat dissipation method of the liquid spectrometer is mainly cooled by a built-in fan. However, when the liquid spectrometer is actually working, the outer wall of the liquid spectrometer will have a locally high temperature. For a precision liquid spectrometer, stable and effective heat dissipation has a great impact on its service life and use effect. Therefore, we have made improvements to this and proposed a liquid spectrometer for veterinary drug residue detection. Summary of the invention

[0005] In view of the problem that the heat dissipation effect of the existing liquid spectrometer needs to be improved, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a liquid spectrometer for veterinary drug residue detection, and its purpose is: by arranging a heat dissipation protection component outside the liquid spectrometer body, the heat dissipation protection component can perform directional and uniform air cooling on the side walls of the liquid spectrometer body when the liquid spectrometer body is working, thereby avoiding overheating and damage of the liquid spectrometer body and ensuring the service life of the liquid spectrometer body.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a liquid spectrometer for detecting veterinary drug residues, comprising a liquid spectrometer body, a heat dissipation protection component is arranged outside the liquid spectrometer body, the heat dissipation protection component comprises a positioning frame, the positioning frame is composed of four U-shaped structures, the interiors of the four U-shaped structures are respectively above the liquid spectrometer body, on the left and right opposite sides and on the front side of the liquid spectrometer body, a second dustproof cloth is installed at the rear side of the positioning frame close to the liquid spectrometer body, a bracket is installed on one side of the bottom of the liquid spectrometer body, a fan and a refrigeration module are installed on the top of the bracket, the fan is connected to the refrigeration module, and the rear end surface of the positioning frame close to the liquid spectrometer body Air supply pipes are respectively installed at the corners, the refrigeration modules are respectively connected to the two air supply pipes, the left and right opposite sides of the positioning frame are respectively connected to the first dustproof cloth, and the left and right opposite sides of the positioning frame are respectively slidably provided with heat dissipation covers, the heat dissipation cover is movably connected with a rotating plate through a pin at the front position of the heat dissipation cover close to the liquid-mass spectrometer body, one side of the first dustproof cloth is connected to the second dustproof cloth, and the other side of the first dustproof cloth is connected to the heat dissipation cover, and the two groups of rotating plates can form a protective door on the front side of the liquid-mass spectrometer body through the change of structure and position, when the heat dissipation cover and the rotating plate are located at the left or right position of the positioning frame, the heat dissipation cover is connected to the air supply pipe, and a plurality of air supply nets are provided on the side of the heat dissipation cover close to the liquid-mass spectrometer body.

[0008] As a preferred solution of the liquid spectrometer for detecting veterinary drug residues of the present invention, the first dust-proof cloth and the second dust-proof cloth are made of elastic and airtight materials.

[0009] As a preferred solution of the liquid spectrometer for veterinary drug residue detection described in the present invention, slide grooves are respectively provided at the top and bottom of the left and right opposite sides of the positioning frame, and sliders are respectively installed at the top and bottom of the heat dissipation cover, and the sliders are limited to slide in the slide grooves.

[0010] As a preferred solution of the liquid spectrometer for veterinary drug residue detection described in the present invention, the U-shaped structure of the positioning frame located above is attached to the upper end surface of the liquid spectrometer body, and the bottom of the positioning frame is fixedly connected to the bottom of the liquid spectrometer body.

[0011] As a preferred solution of the liquid spectrometer for veterinary drug residue detection described in the present invention, there is a gap between the U-shaped structures on the left and right opposite sides of the positioning frame and the outer wall of the liquid spectrometer body, and there is a gap between the second dustproof cloth and the outer wall of the liquid spectrometer body.

[0012] As a preferred solution of the liquid spectrometer for detecting veterinary drug residues described in the present invention, wherein: a plurality of air supply heads are vertically and equidistantly connected to the side of the air supply pipe close to the heat dissipation cover, a plurality of silicone holes are vertically and equidistantly embedded and installed on the side of the heat dissipation cover close to the air supply pipe, the air supply heads are plugged into the silicone holes, a plurality of partitions are vertically and equidistantly installed in the heat dissipation cover to divide the heat dissipation cover into a plurality of air supply chambers, and the air supply net is connected to the corresponding air supply chambers.

[0013] As a preferred solution of the liquid spectrometer for veterinary drug residue detection described in the present invention, a shock-absorbing seat is installed at the bottom of the liquid spectrometer body, a screw rod is movably installed in the shock-absorbing seat, a U-shaped wire clamp is installed on one side of the outer wall of the shock-absorbing seat, at least five groups of U-shaped wire clamps are linearly and equidistantly arranged, at least five groups of U-shaped wire clamps are connected in sequence, a baffle is provided on one side of the U-shaped wire clamp, and the screw rod is used to drive the baffle to move to a direction close to the opening of the U-shaped wire clamp, or to drive the baffle to move to a direction away from the opening of the U-shaped wire clamp.

[0014] As a preferred scheme of the liquid spectrometer for veterinary drug residue detection described in the present invention, wherein: a trapezoidal positioning block is installed at the center position of the bottom end of the liquid spectrometer body, the trapezoidal positioning block is located in the shock-absorbing seat, and two trapezoidal shock-absorbing pads are symmetrically arranged in the shock-absorbing seat, and the inclined end faces of the two trapezoidal shock-absorbing pads are matched with the two inclined end faces of the trapezoidal positioning block, the middle of the screw rod slides through the two trapezoidal shock-absorbing pads respectively, and moving seats are respectively installed at both ends of the screw rod, and push plates are respectively installed on the opposite sides of the moving seat, and a number of extrusion springs are connected between the push plate and the trapezoidal shock-absorbing pad, the screw rod is sleeved with an extrusion spring, and the extrusion spring is located between the moving seat and the trapezoidal shock-absorbing pad, and two parallel clamping plates are installed on the inner wall of the shock-absorbing seat, and the extended end of one push plate is limited to slide horizontally between the two clamping plates, and the outer wall of the shock-absorbing seat is provided with a through hole, and the extended end of the other push plate is limited to move horizontally in the through hole, and the extended end of the other push plate is connected to the baffle.

[0015] As a preferred solution of the liquid spectrometer for detecting veterinary drug residues described in the present invention, two groups of threaded structures are arranged on the screw rod, so that when the screw rod rotates, the two movable seats move closer to each other or move away from each other, and two groups of U-shaped wire clamps are symmetrically arranged on the outer wall of the shock-absorbing seat for use with the corresponding two groups of baffles.

[0016] Beneficial effects of the present invention: 1. The present invention provides a heat dissipation protection component outside the liquid-mass spectrometer body. The heat dissipation protection component can not only perform directional and uniform air cooling on the side wall of the liquid-mass spectrometer body when the liquid-mass spectrometer body is working, thereby preventing the liquid-mass spectrometer body from being overheated and damaged, and ensuring the service life of the liquid-mass spectrometer body, but also the heat dissipation protection component can form a protective cover outside the liquid-mass spectrometer body through the transformation of shape and structure, so as to prevent the liquid-mass spectrometer body from accidental collision and dust, thereby realizing the dual-purpose of the heat dissipation protection component and improving the use protection performance of the liquid-mass spectrometer body.

[0017] 2. The present invention arranges a shock-absorbing seat at the bottom of the LC-MS instrument body. When the LC-MS instrument body vibrates during operation, the vibration of the trapezoidal positioning block is first introduced to the two trapezoidal shock-absorbing pads, and the vibration of the two trapezoidal shock-absorbing pads is introduced to the extrusion springs on both sides, so that the shock-absorbing seat is placed on the desktop, and the vibration effect on the desktop is very small, avoiding affecting the accuracy of other instruments on the desktop.

[0018] 3. The present invention can not only adjust the extrusion spring according to the actual working condition of the LC-MS instrument body by rotating the screw rod of the shock-absorbing seat, but also control the baffle to move in the direction away from the U-shaped wire clamp, thereby facilitating the cable to be inserted into the U-shaped wire clamp, or facilitating the cable to be taken out of the U-shaped wire clamp, so as to facilitate the arrangement of the cable positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 The present invention is a schematic structural diagram of the heat dissipation state of the heat dissipation protection component of the liquid spectrometer for detecting veterinary drug residues.

[0020] Figure 2 The present invention is a schematic structural diagram of a non-working state of a heat dissipation protection component of a liquid spectrometer for detecting veterinary drug residues.

[0021] Figure 3 It is a schematic structural diagram of the rear side of the liquid spectrometer for detecting veterinary drug residues of the present invention.

[0022] Figure 4 It is a structural schematic diagram of the rotating plate of the heat dissipation protection component of the liquid spectrometer for veterinary drug residue detection of the present invention in the open state.

[0023] Figure 5 The present invention is a schematic structural diagram of a rotating plate of a heat dissipation protection assembly of a liquid spectrometer for detecting veterinary drug residues in a closed state.

[0024] Figure 6 The present invention is a schematic diagram of the disassembled structure of the heat dissipation protection component of the liquid spectrometer for detecting veterinary drug residues.

[0025] Figure 7 The present invention is a schematic diagram of the coordination structure of the heat dissipation cover and the air supply pipe of the liquid spectrometer for detecting veterinary drug residues.

[0026] Figure 8 The present invention is a schematic diagram of the structure inside the shock-absorbing seat of the liquid spectrometer for detecting veterinary drug residues.

[0027] Fig. 9 The present invention is a schematic cross-sectional structural diagram of a shock-absorbing seat of a liquid spectrometer for detecting veterinary drug residues.

[0028] Description of reference numerals: 1. LC-MS instrument body; 2. Heat dissipation protection assembly; 21. Positioning frame; 211. Slide; 22. Heat dissipation cover; 221. Sliding block; 222. Silicone hole; 223. Air supply net; 224. Partition; 23. Turn plate; 24. Air supply pipe; 241. Air supply head; 25. First dustproof cloth; 26. Second dustproof cloth; 27. Bracket; 28. Fan; 29. ​​Refrigeration module; 3. Shock-absorbing seat; 31. Screw rod; 32. Baffle; 33. U-shaped wire clamp; 34. Trapezoidal positioning block; 35. Trapezoidal shock-absorbing pad; 36. Moving seat; 37. Push plate; 38. Clamp; 39. Extrusion spring. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] Embodiment 1

[0031] Reference Figure 1-7, which is the first embodiment of the present invention, provides a liquid spectrometer for detecting veterinary drug residues. The liquid spectrometer for detecting veterinary drug residues comprises a liquid spectrometer body 1. A heat dissipation protection component 2 is arranged outside the liquid spectrometer body 1. The heat dissipation protection component 2 comprises a positioning frame 21. The positioning frame 21 is composed of four U-shaped structures. The four U-shaped structures are respectively located above the liquid spectrometer body 1, on the left and right opposite sides, and on the front side of the liquid spectrometer body 1. A second dustproof cloth 26 is installed at the rear side of the positioning frame 21 close to the liquid spectrometer body 1. A bracket 27 is installed on one side of the bottom of the liquid spectrometer body 1. A fan 28 and a refrigeration module 29 are installed on the top of the bracket 27. The refrigeration module 29 is a semiconductor refrigerator. When the semiconductor refrigerator is connected to direct current, temperature changes will occur. The cold end of the semiconductor refrigerator is used to cool the incoming air of the fan 28. The fan 28 is connected to the refrigeration module 29. The positioning frame 21 is close to the liquid spectrometer body 1. Air supply pipes 24 are respectively installed at the corners of the rear end surface of the combined instrument body 1, and the refrigeration modules 29 are respectively connected to the two air supply pipes 24, and the left and right opposite sides of the positioning frame 21 are respectively connected to the first dustproof cloth 25, and the left and right opposite sides of the positioning frame 21 are respectively slidably provided with heat dissipation covers 22, and the heat dissipation cover 22 is movably connected with a rotating plate 23 through a pin shaft at the front position of the heat dissipation cover 22 close to the liquid-mass spectrometer body 1. The pin shaft structure is a torsion spring pin shaft, so that the rotating plate 23 can perform a 90° torsion spring limited rotation, one side of the first dustproof cloth 25 is connected to the second dustproof cloth 26, and the other side of the first dustproof cloth 25 is connected to the heat dissipation cover 22. The two groups of rotating plates 23 can form a protective door on the front side of the liquid-mass spectrometer body 1 through the change of structure and position. When the heat dissipation cover 22 and the rotating plate 23 are located at the left or right position of the positioning frame 21, the heat dissipation cover 22 is connected to the air supply pipe 24, and a plurality of air supply nets 223 are provided on the side of the heat dissipation cover 22 close to the liquid-mass spectrometer body 1.

[0032] In this embodiment, when the LC-MS instrument body 1 is ready to work, the heat dissipation cover 22 and the rotating plate 23 are located at the side of the LC-MS instrument body 1. Figure 1 As shown, the heat dissipation cover 22 is connected with the air supply pipe 24, and by controlling the fan 28 and the refrigeration module 29 to be energized, the fan 28 introduces the external wind to the two air supply pipes 24. At the same time, the refrigeration module 29 cools the introduced wind, and the two air supply pipes 24 respectively introduce the cold air into the corresponding heat dissipation cover 22, and the cold air is led out by the air supply net 223 of the heat dissipation cover 22, and blown to the rear end surface and the side end surface of the liquid-mass spectrometer body 1. After the cold air between the positioning frame 21 and the outer wall of the liquid-mass spectrometer body 1 is heat exchanged, the heat exchange wind overflows to the front side of the liquid-mass spectrometer body 1, so that the outer wall of the liquid-mass spectrometer body 1 can be evenly cooled by cold air, so as to avoid overheating and damage of the liquid-mass spectrometer body 1 and ensure the service life of the liquid-mass spectrometer body 1. When the LC-MS instrument body 1 is finished working, the heat dissipation cover 22 is controlled to slide along the positioning frame 21 so that the rotating plate 23 moves toward the front side of the LC-MS instrument body 1. When the rotating plate 23 is completely separated from the positioning frame 21, the rotating plates 23 on both sides are rotated so that the two rotating plates 23 are just closed. Figure 2 As shown, the heat dissipation protection component 2 forms a protective cover structure on the outside of the LC-MS instrument body 1 to prevent the LC-MS instrument body 1 from accidental contact and dust, thereby achieving the dual-purpose effect of the heat dissipation protection component 2 and improving the use protection performance of the LC-MS instrument body 1.

[0033] Embodiment 2

[0034] Reference Figure 1-7 , which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that: The first dustproof cloth 25 and the second dustproof cloth 26 are made of elastic and airtight materials. The four sides of the second dustproof cloth 26 are fixedly connected to the positioning frame 21 respectively. The top and bottom of the first dustproof cloth 25 are fixedly connected to the positioning frame 21 respectively. The first dustproof cloth 25 is located closer to the LC-MS instrument body 1 than the heat dissipation cover 22. When the first dustproof cloth 25 is pulled out, Figure 2 or Figure 5 As shown, the first dustproof cloth 25 and the second dustproof cloth 26 form a part of the dustproof cover of the LC-MS instrument body 1 to achieve the effect of sealing and dustproofing. Figure 1 In the state shown, the second dustproof cloth 26 forms a cooling air guide structure to ensure that the cooling air is in full contact with the rear wall of the LC / MS instrument body 1 .

[0035] Slide grooves 211 are respectively provided at the top and bottom of the left and right opposite sides of the positioning frame 21, and sliders 221 are respectively installed at the top and bottom of the heat dissipation cover 22. The sliders 221 are limited to slide in the slide grooves 211. The slide grooves 211 can limit the sliding position of the heat dissipation cover 22 and prevent the heat dissipation cover 22 from sliding out of the positioning frame 21.

[0036] The U-shaped structure of the positioning frame 21 located above is fitted onto the upper end surface of the LC-MS instrument body 1, and the bottom of the positioning frame 21 is fixedly connected to the bottom of the LC-MS instrument body 1, which can avoid the effect of cooling air being discharged from the top of the LC-MS instrument body 1 or the bottom of the LC-MS instrument body 1 when cooling the LC-MS instrument body 1, so that the cooling air is only directed from the front side of the LC-MS instrument body 1 to ensure that the outer wall of the LC-MS instrument body 1 is fully exposed to the cold air.

[0037] A gap is left between the U-shaped structure on the left and right opposite sides of the positioning frame 21 and the outer wall of the LC-MS instrument body 1, and a gap is left between the second dustproof cloth 26 and the outer wall of the LC-MS instrument body 1. The rear side of the LC-MS instrument body 1 and the left and right opposite sides of the LC-MS instrument body 1 are three heat exchange sides, and the gaps are used for the flow and discharge of cooling air.

[0038] A plurality of air supply heads 241 are connected vertically and equidistantly to one side of the air supply pipe 24 near the heat dissipation cover 22. A plurality of silicone holes 222 are embedded and installed vertically and equidistantly on one side of the heat dissipation cover 22 near the air supply pipe 24. The air supply heads 241 are plugged and matched with the silicone holes 222. A plurality of partitions 224 are installed vertically and equidistantly in the heat dissipation cover 22 to divide the heat dissipation cover 22 into a plurality of air supply cavities. The air supply nets 223 are connected to the corresponding air supply cavities. The partitions 224 are arranged so that the air supply heads 241 can directional guide air to each air supply cavity, so that the plurality of air supply nets 223 can be connected to each air supply cavity. 23 guides the cooling air evenly to the outer walls of the liquid spectrometer body 1 at different heights; when the liquid spectrometer body 1 is working, the heat dissipation cover 22 moves toward the air supply pipe 24, so that the air supply head 241 is automatically sealed and plugged with the silicone hole 222 to form an air guide channel. When the liquid spectrometer body 1 is not working, the heat dissipation cover 22 moves away from the air supply pipe 24, and the air supply head 241 is separated from the silicone hole 222, so that the air guide channel is disconnected and no cooling is performed. The heat dissipation protection component 2 protects the liquid spectrometer body 1 as a whole.

[0039] The remaining structures are the same as those of Example 1.

[0040] Embodiment 3

[0041] Reference Figure 1 , Figure 2 , Figure 3 , Figure 8 and Fig. 9 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that: A shock absorbing seat 3 is installed at the bottom of the LC-MS instrument body 1, a screw rod 31 is movably installed in the shock absorbing seat 3, a U-shaped wire clamp 33 is installed on one side of the outer wall of the shock absorbing seat 3, at least five groups of U-shaped wire clamps 33 are linearly and equidistantly arranged, at least five groups of U-shaped wire clamps 33 are connected in sequence, a baffle 32 is arranged on one side of the U-shaped wire clamp 33, and the screw rod 31 is used to drive the baffle 32 to move to the opening direction close to the U-shaped wire clamp 33, or to drive the baffle 32 to move to the opening direction away from the U-shaped wire clamp 33, such as Figure 8 As shown in the U-shaped wire clamp 33 on the right, the wires can be wound into the U-shaped wire clamp 33 and led out to store the wires, thereby preventing the cables of the LC-MS instrument body 1 from being accidentally squeezed, thereby preventing the LC-MS instrument body 1 from accidentally powering off, and thus managing and protecting the cables.

[0042] A trapezoidal positioning block 34 is installed at the center of the bottom end of the LC-MS instrument body 1. The trapezoidal positioning block 34 is located in the shock-absorbing seat 3. Two trapezoidal shock-absorbing pads 35 are symmetrically arranged in the shock-absorbing seat 3. The inclined end faces of the two trapezoidal shock-absorbing pads 35 fit with the two inclined end faces of the trapezoidal positioning block 34. The middle part of the screw rod 31 slides through the two trapezoidal shock-absorbing pads 35 respectively. The two ends of the screw rod 31 are respectively installed with moving seats 36. The opposite sides of the moving seats 36 are respectively installed with push plates 37. A plurality of extrusion springs 39 are connected between the push plates 37 and the trapezoidal shock-absorbing pads 35. The screw rod 31 is provided with an extrusion spring 39. The extrusion spring 39 is located between the moving seat 36 and the trapezoidal shock-absorbing pad 35. Two parallel clamping plates 38 are installed on the inner wall of the shock absorbing seat 3, and the extended end of one push plate 37 is limited to slide horizontally between the two clamping plates 38. A through hole is opened on the outer wall of the shock absorbing seat 3, and the extended end of the other push plate 37 is limited to move horizontally in the through hole, and the extended end of the other push plate 37 is connected to the baffle 32. When the LC-MS instrument body 1 vibrates during operation, the vibration of the trapezoidal positioning block 34 is first introduced into the two trapezoidal shock absorbing pads 35, and the vibration of the two trapezoidal shock absorbing pads 35 is introduced into the extrusion springs 39 on both sides, so that the shock absorbing seat 3 is placed on the desktop, and the vibration effect on the desktop is very small, thereby avoiding affecting the accuracy of other instruments on the desktop.

[0043] Two groups of threaded structures are provided on the screw rod 31, so that the screw rod 31 can rotate and the two movable seats 36 can move closer to each other or move away from each other. Two groups of U-shaped wire clamps 33 are symmetrically provided on the outer wall of the shock-absorbing seat 3 to be used in conjunction with the corresponding two groups of baffles 32. By rotating the screw rod 31, the two movable seats 36 can be moved, so that the push plate 37 can be moved in the direction close to the trapezoidal shock-absorbing pad 35, or away from the trapezoidal shock-absorbing pad 35, so that the extrusion spring 39 can be adjusted according to the actual working conditions of the liquid-mass spectrometer body 1. At the same time, the baffle 32 can be moved in the direction away from the U-shaped wire clamp 33 by rotating the screw rod 31, so as to facilitate the cable to be inserted into the U-shaped wire clamp 33, or to facilitate the cable to be taken out of the U-shaped wire clamp 33, so as to facilitate the position of the cable.

[0044] The remaining structure is the same as that of Example 2.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A liquid spectrometer for detecting veterinary drug residues, comprising a liquid spectrometer body (1), characterized in that: A heat dissipation protection component (2) is arranged outside the liquid-mass spectrometer body (1), and the heat dissipation protection component (2) comprises a positioning frame (21), and the positioning frame (21) is composed of four U-shaped structures, and the four U-shaped structures are respectively located above the liquid-mass spectrometer body (1), on the left and right opposite sides, and on the front side of the liquid-mass spectrometer body (1). A second dustproof cloth (26) is installed at a rear position of the positioning frame (21) close to the liquid-mass spectrometer body (1). A bracket (27) is installed at one side of the bottom of the liquid-mass spectrometer body (1), and a fan (28) and a refrigeration module (29) are installed at the top of the bracket (27). The fan (28) is connected to the refrigeration module (29). Air supply pipes (24) are respectively installed at the corners of the rear end surface of the positioning frame (21) close to the liquid-mass spectrometer body (1). The refrigeration module (29) is respectively connected to the two air supply pipes (24). 4), the first dustproof cloth (25) is connected to the left and right opposite sides of the positioning frame (21), and the heat dissipation cover (22) is slidably provided on the left and right opposite sides of the positioning frame (21). The heat dissipation cover (22) is movably connected to a rotating plate (23) at a front position close to the liquid-mass spectrometer body (1) through a pin shaft. One side of the first dustproof cloth (25) is connected to the second dustproof cloth (26), and the other side of the first dustproof cloth (25) is connected to the heat dissipation cover (22). The two sets of rotating plates (23) can form a protective door on the front side of the liquid-mass spectrometer body (1) through the change of structure and position. When the heat dissipation cover (22) and the rotating plate (23) are located at the left or right position of the positioning frame (21), the heat dissipation cover (22) is connected to the air supply pipe (24), and a plurality of air supply nets (223) are provided on the side of the heat dissipation cover (22) close to the liquid-mass spectrometer body (1).

2. The liquid spectrometer for detecting veterinary drug residues according to claim 1, characterized in that: The first dustproof cloth (25) and the second dustproof cloth (26) are made of elastic and airtight material.

3. The liquid spectrometer for detecting veterinary drug residues according to claim 2, characterized in that: The top and bottom of the left and right opposite sides of the positioning frame (21) are respectively provided with sliding grooves (211), and the top and bottom of the heat dissipation cover (22) are respectively provided with sliding blocks (221), and the sliding blocks (221) are limited in position and slide in the sliding grooves (211).

4. The liquid spectrometer for detecting veterinary drug residues according to claim 3, characterized in that: The U-shaped structure of the positioning frame (21) located at the top is fitted onto the upper end surface of the LC-MS instrument body (1), and the bottom of the positioning frame (21) is fixedly connected to the bottom of the LC-MS instrument body (1).

5. The liquid spectrometer for detecting veterinary drug residues according to claim 4, characterized in that: A gap is left between the U-shaped structures on the left and right opposite sides of the positioning frame (21) and the outer wall of the LC-MS instrument body (1), and a gap is left between the second dustproof cloth (26) and the outer wall of the LC-MS instrument body (1).

6. The liquid spectrometer for detecting veterinary drug residues according to claim 5, characterized in that: A plurality of air supply heads (241) are vertically and equidistantly connected to one side of the air supply pipe (24) close to the heat dissipation cover (22); a plurality of silicone holes (222) are vertically and equidistantly embedded and installed on one side of the heat dissipation cover (22) close to the air supply pipe (24); the air supply heads (241) are plugged and matched with the silicone holes (222); a plurality of partitions (224) are vertically and equidistantly installed in the heat dissipation cover (22) to divide the heat dissipation cover (22) into a plurality of air supply chambers; and the air supply net (223) is connected to the corresponding air supply chambers.

7. The liquid spectrometer for detecting veterinary drug residues according to claim 6, characterized in that: A shock absorbing seat (3) is installed at the bottom of the liquid-mass spectrometer body (1), a screw rod (31) is movably installed in the shock absorbing seat (3), a U-shaped wire clamp (33) is installed on one side of the outer wall of the shock absorbing seat (3), at least five groups of the U-shaped wire clamps (33) are linearly and equidistantly arranged, and the at least five groups of U-shaped wire clamps (33) are connected in sequence, a baffle (32) is arranged on one side of the U-shaped wire clamp (33), and the screw rod (31) is used to drive the baffle (32) to move to a direction close to the opening of the U-shaped wire clamp (33), or to drive the baffle (32) to move to a direction away from the opening of the U-shaped wire clamp (33).

8. The liquid spectrometer for detecting veterinary drug residues according to claim 7, characterized in that: A trapezoidal positioning block (34) is installed at the center of the bottom end of the LC-MS instrument body (1). The trapezoidal positioning block (34) is located in the shock-absorbing seat (3). Two trapezoidal sliding blocks (35) are symmetrically arranged in the shock-absorbing seat (3). The inclined end surfaces of the two trapezoidal sliding blocks (35) fit with the two inclined end surfaces of the trapezoidal positioning block (34). The middle part of the screw rod (31) slides through the two trapezoidal sliding blocks (35) respectively. The two ends of the screw rod (31) are respectively installed with moving seats (36). The opposite sides of the moving seats (36) are respectively installed with push plates (37). The push plates (37) A plurality of extrusion springs (39) are connected to the trapezoidal slider (35), the screw rod (31) is sleeved with an extrusion spring (39), the extrusion spring (39) is located between the movable seat (36) and the trapezoidal slider (35), the inner wall of the shock absorbing seat (3) is provided with two parallel clamping plates (38), the extended end of one push plate (37) is limited to slide horizontally between the two clamping plates (38), the outer wall of the shock absorbing seat (3) is provided with a through hole, the extended end of the other push plate (37) is limited to move horizontally in the through hole, and the extended end of the other push plate (37) is connected to the baffle (32).

9. The liquid spectrometer for detecting veterinary drug residues according to claim 8, characterized in that: The screw rod (31) is provided with two sets of threaded structures, so that when the screw rod (31) rotates, the two movable seats (36) move toward each other or away from each other. Two sets of U-shaped wire clamps (33) are symmetrically provided on the outer wall of the shock-absorbing seat (3) to cooperate with the corresponding two sets of baffles (32).

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