An optical path assembly for an atomic absorption spectrophotometer with a rapidly replaceable light source.

Abstract

This utility model discloses an optical path assembly for an atomic absorption spectrophotometer with a rapidly replaceable light source, belonging to the field of spectrophotometer technology. This optical path assembly includes a main body and a replacement mechanism. The main body includes a spectrophotometer body with a hinged door on one side. The replacement mechanism includes a light source chamber located on the upper side of the spectrophotometer body. A connecting frame is installed inside the light source chamber, with an incident aperture on the upper side of the connecting frame. A conductive slip ring is installed on the bottom side of the connecting frame, with a connecting shaft connected to the rotating end of the conductive slip ring. Several support frames are installed on the outer side of the connecting shaft. A first clamping frame and a second clamping frame are hinged to both sides of the upper end of each support frame. A hollow cathode lamp is inserted between the first and second clamping frames. This utility model effectively improves the practicality of the optical path assembly for an atomic absorption spectrophotometer and has high practical value.

Description

Technical Field

[0001] This utility model relates to the field of spectrophotometer technology, specifically to an optical path component for an atomic absorption spectrophotometer with a rapidly replaceable light source. Background Technology

[0002] Atomic absorption spectrophotometers, commonly used trace element detection devices in the field of analytical chemistry, work on the principle of using characteristic spectral lines emitted by a light source to pass through the atomic vapor of the sample, and then using the degree of absorption of specific spectral lines by atoms to achieve quantitative elemental analysis.

[0003] Based on the above, the inventors have discovered the following problems: the light source of the traditional optical path assembly is fixed with multiple screws, which takes a lot of time to replace and is cumbersome to operate. Especially when batch detecting multiple elements, the time consumption is too long and affects work efficiency. In addition, special tools are required during disassembly and assembly. If the operation is not done properly, the disassembly and assembly tools may damage other components inside the light source chamber.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided an atomic absorption spectrophotometer optical path component that can quickly replace the light source, in order to achieve a more practical value. Utility Model Content

[0005] The purpose of this invention is to provide an atomic absorption spectrophotometer optical path assembly with a quickly replaceable light source, in order to solve the problem mentioned in the background art that the light source of the traditional optical path assembly is fixed by multiple screws, and the replacement requires a lot of time and is cumbersome.

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0007] An atomic absorption spectrophotometer optical path assembly with a quickly replaceable light source includes a main body and a replacement mechanism. The main body includes a spectrophotometer body with a hinged door on one side. The replacement mechanism includes a light source chamber located on the upper side of the spectrophotometer body. A connecting frame is installed inside the light source chamber, and an incident aperture is provided on the upper side of the connecting frame. A conductive slip ring is installed on the bottom side of the connecting frame, and a connecting shaft is connected to the rotating end of the conductive slip ring. Several support frames are installed on the outer side of the connecting shaft. A first clamping frame and a second clamping frame are hinged to both sides of the upper end of the support frames. A hollow cathode lamp is inserted between the first clamping frame and the second clamping frame. A latch is fixedly installed at the top of the first clamping frame, and a locking block is fixedly installed at the top of the second clamping frame. The inside of the latch is inserted into one end of the locking block.

[0008] Furthermore, a first slide rod is fixedly installed on the inner side of the locking block, and two locking blocks are slidably installed at both ends of the first slide rod, with a pair of locking blocks mirror images of each other.

[0009] The beneficial effect of adopting the above-mentioned further solution is that the first sliding rod on the inner side of the locking block provides a sliding guide for the locking block, ensuring that a pair of mirror-set locking blocks can move synchronously towards or away from each other; the locking block can be engaged and fixed with the slot in the latch, preventing the latch from loosening after being inserted with the locking block, and improving the clamping stability of the hollow cathode lamp.

[0010] Furthermore, slots are provided on both sides of the inside of the latch, and a pair of locking blocks extend through the locking block to the outside and engage with the slots.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the slot inside the latch engages with the latch block, which can firmly fix the latch and the locking block, prevent the first clamping frame and the second clamping frame from separating when the equipment is running or moving, ensure the stability of the hollow cathode lamp position, avoid optical path deviation caused by lamp displacement, and ensure detection accuracy.

[0012] Furthermore, each end of the locking block is movably inserted with a pressing block, and one side of the opposite end of the pair of pressing blocks is respectively connected to the bottom side of the pair of locking blocks.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the pressing blocks at both ends of the locking block can directly drive the card block to move. When it is necessary to disassemble the hollow cathode lamp, pressing the pressing block can drive the card block to disengage from the card slot, release the lock and the locking block from fixing. The operation is convenient and does not require complicated tools, further shortening the light source replacement time.

[0014] Furthermore, a fixing frame is installed at one end of the locking block, and a second sliding rod is installed on both sides of the fixing frame. The opposite ends of the pressing block are slidably connected to a pair of the second sliding rods respectively.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the second slide bar on the fixed frame provides a sliding guide for the pressing block, ensuring that the pressing block moves in a straight line and avoiding deviation during pressing, which would cause the block to fail to accurately disengage from the slot.

[0016] Furthermore, springs are fitted on the outer side of the second slide bar, and the two ends of the springs are fixedly connected to the fixing frame and the pressing block, respectively.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the spring on the outside of the second slide bar has an elastic reset function. When the pressing block is released, the spring can push the pressing block to reset, causing the locking block to re-engage into the slot, thereby achieving automatic fixing of the latch and the locking block.

[0018] Furthermore, a connector is fixedly installed at one end of the connecting shaft, and the connector is electrically connected to the conductive slip ring via a wire. The input end of the hollow cathode lamp is electrically connected to the output end of the connector via a wire.

[0019] The beneficial effects of adopting the above-mentioned further solution are that the connector connects the conductive slip ring and the hollow cathode lamp via a wire, ensuring that the circuit remains conductive when the connecting shaft drives the hollow cathode lamp to rotate and switch, eliminating the need for repeated plugging and unplugging of the wire and avoiding the impact of wire wear or poor contact on the stability of the light source; the rotating end of the conductive slip ring cooperates with the connecting shaft to achieve stable power supply during rotation, ensuring normal operation after switching between different hollow cathode lamps. Furthermore, a damping shaft is rotatably connected inside the connecting frame to one side of the conductive slip ring, and one end of the damping shaft is connected to the rotating end of the conductive slip ring.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the damping shaft inside the connecting frame is connected to the rotating end of the conductive slip ring, which can provide damping force when the connecting shaft is rotated to switch the hollow cathode lamp, so that the connecting shaft rotates smoothly and avoids the hollow cathode lamp from shifting due to inertia; at the same time, the damping shaft can fix the position of the connecting shaft after the rotation stops, ensuring that the hollow cathode lamp and the incident aperture are precisely aligned and ensuring the optical path accuracy.

[0021] Furthermore, a sealing door is hinged to the upper side of the light source chamber via a pair of hinges, and a pair of adjusting feet are threaded to both sides of the bottom of the spectrophotometer body.

[0022] The beneficial effects of adopting the above-mentioned further solutions are that the sealed door at the top of the light source chamber can isolate external dust and light interference, protect the internal hollow cathode lamp and optical path components, and prevent dust from affecting the transparency of the optical path or external light from interfering with the detection results; the adjustable feet at the bottom of the spectrophotometer body can be adjusted in height through threads to ensure that the equipment is placed stably, avoid optical path deviation caused by equipment tilting, and improve detection accuracy.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: The optical path assembly of the atomic absorption spectrophotometer with quick light source replacement provides the installation foundation for the optical path assembly with the main spectrophotometer body, and the box door facilitates overall maintenance; the light source chamber of the replacement mechanism provides a closed installation space for the hollow cathode lamp, and the incident aperture on the connecting frame can control the incident light flux to ensure optical path stability; the conductive slip ring can keep the circuit conductive when the connecting shaft rotates, and several support frames on the outside of the connecting shaft can simultaneously install multiple sets of hollow cathode lamps. Different light sources can be switched by rotating the connecting shaft without repeated disassembly and assembly; the first clamping frame and the second clamping frame cooperate to clamp the hollow cathode lamp, and the latch and the locking block are inserted and fixed to realize the rapid positioning and fixing of the lamp, which greatly shortens the light source replacement time and improves experimental efficiency. The first sliding rod on the inner side of the locking block provides a sliding guide for the locking block, ensuring that a pair of mirror-set locking blocks can move synchronously towards or away from each other; the locking block can be engaged and fixed with the locking slot in the latch, preventing the latch and the locking block from loosening after insertion, and improving the clamping stability of the hollow cathode lamp. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source, as disclosed in an embodiment of the present invention. Figure 1 ;

[0025] Figure 2 This is a three-dimensional structural diagram of the optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source, as disclosed in an embodiment of the present invention. Figure 2 ;

[0026] Figure 3 This is a three-dimensional structural diagram of the optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source, as disclosed in an embodiment of the present invention. Figure 3 ;

[0027] Figure 4 This is a cross-sectional schematic diagram of the optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source disclosed in an embodiment of this utility model.

[0028] Figure 5 This is a cross-sectional schematic diagram of the optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source, as disclosed in an embodiment of this utility model.

[0029] In the diagram: 1. Main body; 101. Spectrophotometer body; 102. Door; 103. Adjustable feet; 2. Replacement mechanism; 201. Light source chamber; 202. Sealed door; 203. Connecting frame; 204. Conductive slip ring; 205. Incident aperture; 206. Hollow cathode lamp; 207. Connecting shaft; 208. Support frame; 209. Connector; 211. First clamping frame; 212. Second clamping frame; 213. Lock; 214. Locking block; 215. Pressing block; 216. Second slide rod; 217. Spring; 218. Fixing frame; 219. Slot; 220. First slide rod; 221. Locking block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1 - Figure 5 This utility model provides a technical solution: an atomic absorption spectrophotometer optical path assembly with a quickly replaceable light source, comprising a main body 1 and a replacement mechanism 2. The main body 1 includes a spectrophotometer body 101, and a door 102 is hinged to one side of the spectrophotometer body 101 via a hinge. The replacement mechanism 2 includes a light source chamber 201, which is located on the upper side of the spectrophotometer body 101. A connecting frame 203 is installed inside the light source chamber 201, and an incident aperture 205 is provided on the upper side of the connecting frame 203. A connecting frame 205 is installed on the bottom side of the connecting frame 203. A conductive slip ring 204 is provided, and a connecting shaft 207 is connected to the rotating end of the conductive slip ring 204. Several support frames 208 are installed on the outside of the connecting shaft 207. A first clamping frame 211 and a second clamping frame 212 are hinged to both sides of the upper end of the support frame 208. A hollow cathode lamp 206 is inserted between the first clamping frame 211 and the second clamping frame 212. A latch 213 is fixedly installed at the top of the first clamping frame 211, and a locking block 214 is fixedly installed at the top of the second clamping frame 212. The inside of the latch 213 is inserted into one end of the locking block 214.

[0032] As an embodiment of this utility model, a first slide rod 220 is fixedly installed on the inner side of the locking block 214, and two ends of the first slide rod 220 are slidably installed with locking blocks 221. A pair of locking blocks 221 are mirror-arranged. The first slide rod 220 on the inner side of the locking block 214 provides sliding guidance for the locking blocks 221, ensuring that a pair of mirror-arranged locking blocks 221 can move synchronously towards or away from each other. The locking blocks 221 can be engaged and fixed with the slots 219 in the latch 213, preventing the latch 213 from loosening after being inserted into the locking block 214, and improving the clamping stability of the hollow cathode lamp 206.

[0033] As an embodiment of this utility model, further, slots 219 are provided on both sides of the inside of the latch 213, and a pair of locking blocks 221 extend through the locking block 214 to the outside and engage with the slots 219. The slots 219 and locking blocks 221 in the latch 213 can firmly fix the latch 213 and the locking block 214, preventing the first clamping frame 211 and the second clamping frame 212 from separating when the equipment is running or moving, ensuring the stability of the hollow cathode lamp 206, avoiding optical path deviation due to lamp displacement, and ensuring detection accuracy.

[0034] As an embodiment of this utility model, both ends of the locking block 214 are movably inserted with pressing blocks 215. One side of the opposite end of a pair of pressing blocks 215 is respectively connected to the bottom side of a pair of locking blocks 221. The pressing blocks 215 at both ends of the locking block 214 can directly drive the locking blocks 221 to move. When it is necessary to disassemble the hollow cathode lamp 206, pressing the pressing blocks 215 can drive the locking blocks 221 to disengage from the slots 219, thereby releasing the lock 213 from the locking block 214. The operation is convenient and does not require complicated tools, further shortening the time for replacing the light source.

[0035] As an embodiment of this utility model, a fixing frame 218 is installed at one end of the locking block 214. A second slide rod 216 is installed on both sides of the fixing frame 218. The opposite ends of the pressing block 215 are slidably connected to a pair of second slide rods 216. The second slide rods 216 on the fixing frame 218 provide sliding guidance for the pressing block 215, ensuring that the pressing block 215 moves in a straight line and avoiding deviation during pressing, which would cause the locking block 221 to fail to accurately disengage from the slot 219.

[0036] As an embodiment of this utility model, further, springs 217 are sleeved on the outer side of the second slide bar 216. The two ends of the springs 217 are fixedly connected to the fixing frame 218 and the pressing block 215 respectively. The springs 217 on the outer side of the second slide bar 216 have an elastic reset function. When the pressing block 215 is released, the springs 217 can push the pressing block 215 to reset, causing the locking block 221 to re-enter the locking groove 219, thereby realizing the automatic fixing of the latch 213 and the locking block 214.

[0037] As an embodiment of this utility model, a connector 209 is fixedly installed at one end of the connecting shaft 207. The connector 209 is electrically connected to the conductive slip ring 204 via a wire. The input end of the hollow cathode lamp 206 is electrically connected to the output end of the connector 209 via a wire. The connector 209 connects the conductive slip ring 204 and the hollow cathode lamp 206 via a wire, ensuring that the circuit is always conductive when the connecting shaft 207 drives the hollow cathode lamp 206 to rotate and switch, eliminating the need for repeated plugging and unplugging of wires and avoiding wire wear or poor contact affecting the stability of the light source. The rotating end of the conductive slip ring 204 cooperates with the connecting shaft 207 to achieve stable power supply in the rotation state, ensuring that different hollow cathode lamps 206 can work normally after switching.

[0038] As an embodiment of this utility model, further, a damping shaft is rotatably connected inside the connecting frame 203 to one side of the conductive slip ring 204. One end of the damping shaft is connected to the rotating end of the conductive slip ring 204. The connection between the damping shaft inside the connecting frame 203 and the rotating end of the conductive slip ring 204 can provide damping force when the connecting shaft 207 is rotated to switch the hollow cathode lamp 206, so that the connecting shaft 207 rotates smoothly and avoids the hollow cathode lamp 206 from shifting due to inertia. At the same time, the damping shaft can fix the position of the connecting shaft 207 after the rotation stops, ensuring that the hollow cathode lamp 206 and the incident aperture 205 are accurately aligned and ensuring the accuracy of the optical path.

[0039] As an embodiment of this utility model, the upper side of the light source chamber 201 is hinged with a sealing door 202 via a pair of hinges, and the bottom sides of the spectrophotometer body 101 are threaded with a pair of adjusting feet 103. The sealing door 202 at the upper end of the light source chamber 201 can isolate external dust and light interference, protect the internal hollow cathode lamp 206 and optical path components, and prevent dust from affecting the transparency of the optical path or external light from interfering with the detection results. The adjusting feet 103 at the bottom of the spectrophotometer body 101 can be adjusted in height via threads to ensure that the equipment is placed stably, avoid optical path deviation due to equipment tilting, and improve detection accuracy.

[0040] Specifically, the working principle of this atomic absorption spectrophotometer optical path assembly with a quickly replaceable light source is as follows: In use, first adjust the equipment level using the adjusting feet 103 at the bottom of the spectrophotometer body 101 to ensure optical path stability. Then, open the sealed door 202 at the top of the light source chamber 201. If a hollow cathode lamp 206 needs to be installed, place it between the first clamping frame 211 and the second clamping frame 212 at the top of the support frame 208, and rotate the first clamping frame 211 and the second clamping frame 212. To fit the lamp body, press the pressing blocks 215 at both ends of the locking block 214. The pressing blocks 215 slide along the second slide rod 216 and push the locking block 221 into the interior of the locking block 214. Then, insert the latch 213 into the locking block 214. At this time, release the pressing blocks 215, so that the locking block 221 on the first slide rod 220 inside the locking block 214 pops out under the indirect action of the spring 217 and engages with the slot 219 on the inner side of the latch 213, thus achieving quick fixation of the hollow cathode lamp 206; Hollow cathode lamp 206 is electrically connected to connector 209 at one end of connecting shaft 207 via a wire. Connector 209 is then connected to conductive slip ring 204 via a wire to ensure circuit continuity. When switching light sources is required, rotating connecting shaft 207 causes outer support frame 208 and hollow cathode lamp 206 to rotate synchronously. The damping shaft inside connecting frame 203 provides smooth damping for connecting shaft 207 to prevent inertial displacement, while conductive slip ring 204 ensures continuous power supply to the circuit during rotation. The light source switching is completed when the target hollow cathode lamp 206 is precisely aligned with the incident aperture 205 on the connecting frame 203. If the old lamp needs to be removed, press the pressing blocks 215 at both ends of the locking block 214. The pressing blocks 215 slide along the second slide bar 216 and push the locking block 221 out of the slot 219, thus opening the latch 213 and the locking block 214 and removing the hollow cathode lamp 206. The entire process does not require repeated plugging and unplugging of wires or disassembly of complex components, and the sealed door 202 can isolate external interference. It should be noted that the standard parts used in this application can all be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Furthermore, this application is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail in this application.

Claims

1. An optical path assembly for an atomic absorption spectrophotometer with a rapidly replaceable light source, characterized in that, The system includes a main body (1) and a replacement mechanism (2). The main body (1) includes a spectrophotometer body (101), and a door (102) is hinged to one side of the spectrophotometer body (101). The replacement mechanism (2) includes a light source chamber (201), which is located on the upper side of the spectrophotometer body (101). A connecting frame (203) is installed inside the light source chamber (201). An incident aperture (205) is provided on the upper side of the connecting frame (203). A conductive slip ring (204) is installed on the bottom side of the connecting frame (203). 4) The rotating end is connected to a connecting shaft (207). Several support frames (208) are installed on the outside of the connecting shaft (207). The upper ends of the support frames (208) are hinged to a first clamping frame (211) and a second clamping frame (212). A hollow cathode lamp (206) is inserted between the first clamping frame (211) and the second clamping frame (212). A latch (213) is fixedly installed at the top of the first clamping frame (211). A locking block (214) is fixedly installed at the top of the second clamping frame (212). The inside of the latch (213) is inserted into one end of the locking block (214).

2. The optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source according to claim 1, characterized in that, The locking block (214) has a first slide rod (220) fixedly installed on its inner side. The two ends of the first slide rod (220) are slidably installed with locking blocks (221), and a pair of locking blocks (221) are mirror images of each other.

3. The optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source according to claim 2, characterized in that, The latch (213) has slots (219) on both sides inside. A pair of locking blocks (221) extend through the locking block (214) to the outside and engage with the slots (219).

4. The optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source according to claim 3, characterized in that, Both ends of the locking block (214) are movably inserted with pressing blocks (215), and one side of the opposite end of the pair of pressing blocks (215) is respectively connected to the bottom side of the pair of locking blocks (221).

5. The optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source according to claim 4, characterized in that, A fixing frame (218) is installed at one end of the locking block (214), and a second slide rod (216) is installed on both sides of the fixing frame (218). The opposite ends of the pressing block (215) are slidably connected to a pair of the second slide rods (216).

6. The optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source according to claim 5, characterized in that, Springs (217) are fitted on the outer side of the second slide bar (216), and the two ends of the springs (217) are fixedly connected to the fixing frame (218) and the pressing block (215) respectively.

7. The optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source according to claim 1, characterized in that, A connector (209) is fixedly installed at one end of the connecting shaft (207). The connector (209) is electrically connected to the conductive slip ring (204) via a wire. The input end of the hollow cathode lamp (206) is electrically connected to the output end of the connector (209) via a wire.

8. The optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source according to claim 1, characterized in that, The connecting frame (203) is rotatably connected to a damping shaft located on one side of the conductive slip ring (204), and one end of the damping shaft is connected to the rotating end of the conductive slip ring (204).

9. The optical path assembly of an atomic absorption spectrophotometer with a rapidly replaceable light source according to claim 1, characterized in that, A sealing door (202) is hinged to one side of the upper end of the light source chamber (201) via a pair of hinges, and a pair of adjusting feet (103) are threaded to both sides of the bottom end of the spectrophotometer body (101).

Images