A negative pressure continuous photochemical reactor

Abstract

The present invention discloses a negative pressure continuous photochemical reactor, comprising a reaction kettle, a circular tube, an ultraviolet light source and a driving mechanism. A plurality of circular tubes are provided, wherein the interior of the circular tubes is hollow and has a first filter section and a second filter section; a plurality of ultraviolet light sources are provided and are respectively located in the corresponding circular tubes, wherein the length of the ultraviolet light source is less than the length of the first filter section or the second filter section; and the driving mechanism is used to synchronously drive the plurality of ultraviolet light sources to move between the corresponding first filter section and the second filter section. The negative pressure continuous photochemical reactor provided by the present invention can synchronously drive the plurality of ultraviolet light sources to move between the corresponding first filter section and the second filter section through the driving mechanism, so that the ultraviolet light source passes through different filter sections to filter out ultraviolet light of different wavelength ranges, thereby realizing rapid switching of ultraviolet light of different wavelength ranges.

Description

Technical Field

[0001] The invention relates to the technical field of photochemical reactions, and in particular to a negative pressure continuous photochemical reactor. Background Art

[0002] Photochemical reactors are key equipment for photochemical production. They are of various types and have different uses. The quality of their performance is of great significance to the application of photochemical reaction processes. Many photochemical target products will further undergo photochemical reactions to generate other by-products under the action of ultraviolet light of different wavelengths, so the final reaction products are very complex.

[0003] For example, the patent publication number is CN101695648B, and the name is "A Negative Pressure Continuous Ultraviolet Photochemical Reactor". The invention has several vertical hollow round tubes, which are filter glass with a wavelength of 280nm to 300nm and a UV light transmittance of 30% to 60%. A high-pressure mercury lamp is installed at the center of the round tube. The entire reaction system is a sealed structure, and two vacuum pumps are installed outside to maintain a certain vacuum degree and pressure difference in the system, promote the renewal of the feed liquid, and improve the photochemical conversion efficiency of the continuous operation without nitrogen protection.

[0004] In order to reduce the generation of by-products, the existing photochemical reactor generally changes the wavelength range of ultraviolet light by replacing the light source or the filter when in use. Since a large number of light sources are used, replacing them one by one will waste a lot of time. Summary of the invention

[0005] The purpose of the present invention is to provide a negative pressure continuous photochemical reactor to solve the above-mentioned shortcomings in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A negative pressure continuous photochemical reactor, comprising a reaction kettle, and further comprising:

[0008] A plurality of circular tubes are provided, wherein the interior of the circular tubes is hollow and has a first light filtering portion and a second light filtering portion.

[0009] A plurality of ultraviolet light sources are provided and are respectively located in the corresponding circular tubes. The length of the ultraviolet light source is smaller than the length of the first filter part or the second filter part.

[0010] A driving mechanism is used for synchronously driving the plurality of ultraviolet light sources to move between the corresponding first filter parts and the second filter parts.

[0011] In the above-mentioned negative pressure continuous photochemical reactor, sliders are fixed at both ends of the ultraviolet light source, and the sliders are in contact with the inner wall of the circular tube.

[0012] In the above-mentioned negative pressure continuous photochemical reactor, the first filter part and the second filter part are detachably connected.

[0013] In the negative pressure continuous photochemical reactor, a rotating shaft is rotatably connected inside the reactor, and the plurality of circular tubes are fixed on the rotating shaft.

[0014] In the above-mentioned negative pressure continuous photochemical reactor, the driving mechanism includes an active cavity constructed in the rotating shaft, a driving rod is slidably connected in the active cavity, a connecting rod is hinged to the position of the driving rod corresponding to the circular tube, and the other end of the connecting rod is hinged to the ultraviolet light source.

[0015] In the above-mentioned negative pressure continuous photochemical reactor, a clamping assembly is arranged at the bottom of the driving rod, which is used to force the driving rod to move upward, and a stopper is arranged at the top of the driving rod.

[0016] The above-mentioned negative pressure continuous photochemical reactor is provided with a top cover on which a connecting plate is rotatably connected, and the stopper is slidably connected to the connecting plate. It also includes a limiting mechanism for limiting the relative position of the stopper and the connecting plate.

[0017] In the above-mentioned negative pressure continuous photochemical reactor, the limiting mechanism includes a movable groove constructed on the block, a limiting rod is inserted in the movable groove, a plurality of limiting holes adapted to the limiting rod are constructed on the connecting plate, and a driving assembly is arranged in the movable groove.

[0018] In the above-mentioned negative pressure continuous photochemical reactor, the bottom of the block is configured with a connecting hole connected to the movable groove, the driving rod is adapted to the connecting hole, a clamping block is fixed on the limiting rod, and a clamping groove is configured on the driving rod.

[0019] The above-mentioned negative pressure continuous photochemical reactor, the driving assembly includes an adjusting screw rotatably connected to the block, the adjusting screw extends into the movable groove, a wedge block is slidably connected in the movable groove, the wedge block is threadedly connected to the adjusting screw, the side of the wedge block opposite to the blocking block is constructed as an inclined surface, and a second spring is sleeved on the limiting rod.

[0020] In the above technical scheme, the present invention provides a negative pressure continuous photochemical reactor, which can synchronously drive multiple ultraviolet light sources to move between the corresponding first filter part and the second filter part through a driving mechanism, so that the ultraviolet light sources pass through different filter parts to filter out ultraviolet light of different wavelength ranges, thereby realizing rapid switching of ultraviolet light of different wavelength ranges.

[0021] Since ultraviolet light of different wavelength ranges will result in different light conversion yields, different photochemical reactions can be adapted by switching the wavelength range of ultraviolet light, or the effects of ultraviolet light of different wavelength ranges on the light conversion yield can be compared in the same photochemical reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of a rotating shaft structure provided by an embodiment of the present invention;

[0025] Figure 3 The embodiment of the present invention provides Figure 1 The enlarged structural diagram at A in the middle;

[0026] Figure 4 The embodiment of the present invention provides Figure 1 The enlarged structural diagram at B in the middle;

[0027] Figure 5 The embodiment of the present invention provides Figure 1 The enlarged structural diagram at C in the middle;

[0028] Figure 6 The embodiment of the present invention provides Figure 1 The enlarged structural diagram at D in the middle;

[0029] Figure 7 A schematic diagram of the structure of the connecting plate provided in an embodiment of the present invention;

[0030] Figure 8 A schematic diagram of a cross-sectional structure of a stopper provided in an embodiment of the present invention;

[0031] Fig. 9 A schematic diagram of a card block structure provided in an embodiment of the present invention;

[0032] Fig.10 A schematic diagram of the structure of a circular tube provided by an embodiment of the present invention;

[0033] Fig.11 The embodiment of the present invention provides Fig.10 The enlarged structural diagram at E in the middle;

[0034] Fig.12This is a structural schematic diagram of a slider provided in an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1. Reactor; 2. Circular tube; 201. First filter section; 202. Second filter section; 203. Connecting ring; 204. Blocking plate; 205. Outer ring; 206. Inner ring; 207. Fixing rod; 208. Fixing hole; 209. Return spring; 210. Contact plate; 211. Contact groove; 212. Snap block; 213. Snap groove; 3. UV light source; 31. Slider; 4. Rotating shaft; 5. Movable cavity; 6, driving rod; 7, connecting rod; 8, diagonal support plate; 9, stopper; 10, plug rod; 11, first spring; 12, open slot; 13, top cover; 14, connecting plate; 15, through slot; 16, movable slot; 17, limiting rod; 18, limiting hole; 19, connecting hole; 20, block; 21, adjusting screw; 22, wedge block; 23, second spring; 24, first inclined portion; 25, second inclined portion. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] Reference Figure 1-12 An embodiment of the present invention provides a negative pressure continuous photochemical reactor, comprising a reactor 1, a circular tube 2, an ultraviolet light source 3 and a driving mechanism, wherein the ultraviolet light source 3 is provided in plurality, the circular tube 2 is hollow inside and has a first filter section 201 and a second filter section 202; the ultraviolet light source 3 is provided in plurality and is respectively located in the corresponding circular tube 2, the length of the ultraviolet light source 3 is less than the length of the first filter section 201 or the second filter section 202; the driving mechanism is used for synchronously driving the plurality of ultraviolet light sources 3 to move between the corresponding first filter section 201 and the second filter section 202.

[0039] Specifically, the reactor 1 is a tank-shaped structure, which is generally used together with a collecting tank and a sampling tank. The internal pressures of the reactor 1, the collecting tank and the sampling tank are controlled by a vacuum pump to form a negative pressure difference among the three, so that the liquid to be reacted continuously enters the reactor 1 from the sampling tank or the solution after the reaction enters the collecting tank from the reactor 1, thereby achieving a negative pressure continuous photochemical reaction. The above is the prior art and will not be repeated here. The ultraviolet light source 3 can adopt a mercury lamp. The pressure of the mercury vapor inside the mercury lamp is different, and the ultraviolet light it emits also has different spectra. The filter part can adopt a filter glass or a filter to absorb certain wavelengths emitted by the ultraviolet light source 3. A plurality of corresponding circular tubes 2 and ultraviolet light sources 3 can be arranged in the reactor 1 to ensure that the photochemical reaction is fully carried out. The driving mechanism can adopt a combination of a plurality of electric telescopic rods to achieve the effect of synchronously driving a plurality of ultraviolet light sources 3 to move in the circular tube 2. The above are all prior art. Without going into details, the innovation of the embodiment of the present invention is that the first filter part 201 and the second filter part 202 absorb different wavelengths, and the driving mechanism can synchronously drive multiple ultraviolet light sources 3 to move between the corresponding first filter part 201 and the second filter part 202, so that the ultraviolet light source 3 emits ultraviolet light of different wavelength ranges through the circular tube 2. Since the length of the ultraviolet light source 3 is less than the length of the first filter part 201 or the second filter part 202, the ultraviolet light emitted by the ultraviolet light source 3 through the circular tube 2 has three wavelength ranges. First, the ultraviolet light source 3 is only in the first filter part 201; second, the ultraviolet light source 3 is only in the second filter part 202; third, the ultraviolet light source 3 is between the first filter part 201 and the second filter part 202. With this arrangement, rapid switching of ultraviolet light of different wavelength ranges can be achieved only through the driving mechanism, which is convenient for switching according to the situation during use, which is more convenient.

[0040] A negative pressure continuous photochemical reactor provided by an embodiment of the present invention can synchronously drive multiple ultraviolet light sources 3 to move between the corresponding first filter section 201 and the second filter section 202 through a driving mechanism, so that the ultraviolet light source 3 passes through different filter sections to filter out ultraviolet light of different wavelength ranges, thereby achieving rapid switching of ultraviolet light of different wavelength ranges; since ultraviolet light of different wavelength ranges will lead to different light conversion yields, by switching the wavelength range of ultraviolet light, different photochemical reactions can be adapted, or the effects of ultraviolet light of different wavelength ranges on the light conversion yield can be compared in the same photochemical reaction.

[0041] In another embodiment provided by the present invention, further, sliders 31 are fixed at both ends of the ultraviolet light source 3, and the sliders 31 are in contact with the inner wall of the circular tube 2. Specifically, the sliders 31 are made of opaque material, and the ultraviolet light source 3 can be stably moved in the circular tube 2 through the sliders 31. Since the sliders 31 are in contact with the inner wall of the circular tube 2, when the ultraviolet light source 3 is only in the first filter part 201 or the second filter part 202, the ultraviolet light emitted by it will not be emitted through the other filter part, and the wavelength range of the ultraviolet light is effectively controlled to improve the stability of the photochemical reaction in the reactor 1.

[0042] Furthermore, the first filter section 201 and the second filter section 202 are detachably connected. Specifically, a connecting ring 203 is provided between the first filter section 201 and the second filter section 202, and the connecting ring 203 is made of an opaque material. The connecting ring 203 and the first filter section 201 and the second filter section 202 are all detachably connected, such as threaded connection. Optionally, rubber rings are provided on both sides of the connecting ring 203, and the sealing between the connecting ring 203 and the first filter section 201 and the second filter section 202 can be improved by the rubber rings. The advantage of such a setting is that the first filter section 201 or the second filter section 202 can be sealed by the connecting ring 203 and the rubber rings. 02 is replaced, so that the wavelength range of the ultraviolet light emitted by the ultraviolet light source 3 can be changed by replacing different filter parts, and the wavelength range of the ultraviolet light can be further controlled by the connecting ring 203 (that is, when the ultraviolet light source 3 is only in the first filter part 201 or the second filter part 202, the ultraviolet light will not pass through the connection between the first filter part 201 and the second filter part 202 and emit ultraviolet light of different wavelength ranges), so as to avoid the photochemical target product from further photochemically reacting under the action of ultraviolet light of different wavelengths to generate other by-products.

[0043] Furthermore, the reactor 1 is rotatably connected with a rotating shaft 4, and the plurality of circular tubes 2 are fixed on the rotating shaft 4. Specifically, the reactor 1 is provided with a power source to drive the rotating shaft 4 to rotate in the reactor 1, and the plurality of circular tubes 2 are evenly and symmetrically fixed on both sides of the rotating shaft 4, the first filter portion 201 of the circular tube 2 is fixedly connected to the rotating shaft 4, and the end of the second filter portion 202 away from the first filter portion 201 is constructed as a closed arc, that is, the ultraviolet light source 3 in the circular tube 2 is in a sealed state and will not contact the liquid to be reacted in the reactor 1. Accordingly, the driving mechanism is arranged in the rotating shaft 4, and is used to synchronously drive the plurality of ultraviolet light sources 3 to move in the circular tube 2. The advantages of such an arrangement are, firstly, before the liquid to be reacted enters the reactor 1, First, the wavelength range of the ultraviolet light is switched through the driving mechanism to adapt to different photochemical reactions. Second, when the reaction liquid enters the reactor 1, the power source can drive the rotating shaft 4 to rotate, so that the reaction liquid is stirred by the multiple circular tubes 2 on the rotating shaft 4, so that the catalyst in the reaction liquid can be mixed evenly, thereby improving the catalytic efficiency of the catalyst on the photochemical reaction; third, after stirring for a certain period of time, the ultraviolet light source 3 is turned on, and the ultraviolet light source 3 passes through the filter part and emits ultraviolet light of a certain wavelength range, so that the reaction liquid undergoes a photochemical reaction while being stirred, thereby improving the efficiency of the photochemical reaction.

[0044] In a preferred embodiment provided by the present invention, as an alternative to the above-mentioned connecting ring 203, the rotation is consistent with the above-mentioned embodiment. Further, the first filter part 201 and the second filter part 202 are plugged, and the end of the second filter part 202 away from the rotating shaft 4 is plugged with a blocking plate 204. Specifically, the first filter part 201 is fixed on the rotating shaft 4, the first filter part 201 is configured with an outer ring 205, and the second filter part 202 is configured with an inner ring 206. The inner ring 206 is adapted to the outer ring 205 and can be sleeved together, that is, the inner ring 206 is sleeved on the inner wall of the outer ring 205 (the sealing plate 204 and the second filter part 202 can be used between The same socket connection method), the fitting surfaces between the first filter part 201 and the second filter part 202 and between the second filter part 202 and the blocking plate 204 are coated or vulcanized with a rubber coating, thereby increasing the stability during insertion and improving the overall sealing of the round tube 2; a fixing rod 207 is inserted on the outer ring 205, and a fixing hole 208 adapted to the fixing rod 207 is constructed on the inner ring 206. A reset spring 209 is sleeved on the fixing rod 207, and the two ends of the reset spring 209 are respectively fixed on the fixing rod 207 and the outer ring 205 to force the fixing rod 207 to move away from the fixing hole 208. A resistance plate is provided on the blocking plate 204. 210, the end of the contact plate 210 away from the blocking plate 204 is configured with a contact groove 211, and the opening of the contact groove 211 and the top of the fixing rod 207 are both configured with inclined surfaces. When installing the round tube 2, the second filter part 202 is first plugged into the first filter part 201, and the positions of the fixing rod 207 and the fixing hole 208 are aligned and plugged, and then the blocking plate 204 is sleeved onto the end of the second filter part 202, so that when the contact plate 210 moves toward the first filter part 201, the inclined surface of the contact groove 211 can squeeze the inclined surface of the fixing rod 207, so that the fixing rod 207 squeezes the reset spring 209 and inserts into the fixing hole 208, thereby limiting the relative position of the inner ring 206 and the outer ring 205, and further strengthening the connectivity between the first filter part 201 and the second filter part 202; the advantage of such a configuration is that when the second filter part 202 needs to be removed or replaced, the blocking plate 204 is moved to the side away from the second filter part 202, and when the abutment plate 210 is disengaged from the limit of the abutment plate 210, the fixing rod 207 is relatively disengaged from the abutment groove 211, so that it is disengaged from the fixing hole 208 under the action of the reset spring 209, thereby releasing the fixing effect of the fixing rod 207 on the inner ring 206, so that the second filter part 202 can be directly withdrawn.

[0045] Furthermore, the slider 31 on the side close to the rotating shaft 4 is detachably connected to the ultraviolet light source 3, and the slider 31 on the side away from the rotating shaft 4 is fixedly connected to the ultraviolet light source 3. The driving mechanism is connected to the slider 31 on the side close to the rotating shaft 4 to drive the ultraviolet light source 3 to move in the circular tube 2. Specifically, a clamping block 212 is fixed on the side of the ultraviolet light source 3 close to the rotating shaft 4, and a clamping groove 213 adapted to the clamping block 212 is constructed on the slider 31 on the side close to the rotating shaft 4, that is, the ultraviolet light source 3 and the slider 31 are connected by clamping the clamping block 212 and the clamping groove 213, as shown in FIG. The function of this arrangement is that, during normal use, the driving mechanism can drive the ultraviolet light source 3 to move in the circular tube 2 (when the slider 31 on the side away from the rotating shaft 4 moves to the blocking plate 204, the ultraviolet light source 3 moves to a position where only the second filter part 202 is located); when the second filter part 202 needs to be disassembled, the ultraviolet light source 3 is directly driven by the driving mechanism to squeeze the blocking plate 204 (that is, the slider 31 on the side away from the rotating shaft 4 moves toward the blocking plate 204 and squeezes the blocking plate 204). The light filtering part 201 is restricted by the fixing rod 207, so that the blocking plate 204 moves to the side away from the second light filtering part 202 when being squeezed. During the movement, the fixing rod 207 relatively disengages from the abutment groove 211, so that the fixing rod 207 disengages from the fixing hole 208 under the action of the return spring 209 (at this time, the engaging groove 213 of the slider 31 on the side close to the rotating shaft 4 leaks out from the first light filtering part 201, and the rest of the slider 31 is still in the first light filtering part 201, that is, the slider 31 on the side close to the rotating shaft 4 will not fall off from the first light filtering part 201). Then the second filter 202 can be pulled out from the end of the first filter 201. At the same time, since the snap-in groove 213 leaks out from the first filter 201, the snap-in block 212 at the end of the ultraviolet light source 3 can also be manually removed from the snap-in groove 213, so that the ultraviolet light source 3 can be repaired or replaced. Conversely, the snap-in block 212 at the end of the ultraviolet light source 3 is placed in the snap-in groove 213, and then the ultraviolet light source 3 is received in the first filter 201 by the driving mechanism, and finally the second filter 202 and the blocking plate 204 are re-fixed to make the device work normally. The advantage is that when the position of the ultraviolet light source 3 in the round tube 2 is changed by the driving mechanism, the second filter 202 and the ultraviolet light source 3 can be disassembled by further moving the ultraviolet light source 3, so that different filter parts or ultraviolet light sources 3 can be replaced to adapt to unused photochemical reactions.

[0046] In another embodiment provided by the present invention, as an alternative to the above-mentioned driving method of the ultraviolet light source 3, the structure of the rotating shaft 4 and other structures are the same as those of the above-mentioned embodiment. Further, the driving mechanism includes an active cavity 5 constructed in the rotating shaft 4, and a driving rod 6 is slidably connected in the active cavity 5. The driving rod 6 is hinged with a connecting rod 7 at a position corresponding to the circular tube 2, and the other end of the connecting rod 7 is hinged to the ultraviolet light source 3. Specifically, the active cavity 5 is connected to the space in the circular tube 2, and the other end of the connecting rod 7 is hinged to a slider 31 on the side of the ultraviolet light source 3 close to the rotating shaft 4. A plurality of diagonal support plates 8 are evenly and symmetrically fixed on the rotating shaft 4. The plurality of diagonal support plates 8 are respectively located above the corresponding circular tubes 2. The diagonal support plates 8 are fixed to the first filter part 201. The active cavity 5 extends into the diagonal support plates 8 so that the connecting rod 7 can move (that is, the connecting rod 7 moves above the corresponding ultraviolet light source 3). The rotating shaft 4 is constructed along its axis direction with a connection rod 6 that is suitable for the driving rod 6. The driving groove is equipped with a driving rod 6, and the driving rod 6 is slidably arranged in the driving groove. A linear driving mechanism (such as an electric telescopic rod) can be arranged on the rotating shaft 4 to drive the driving rod 6 to move along the driving groove. The effect of such a setting is that when the driving rod 6 moves downward along the driving groove, the driving rod 6 will drive multiple connecting rods 7 to move in the active cavity 5, thereby driving the slider 31 at the other end thereof to move along the circular tube 2 through the connecting rod 7, thereby driving the ultraviolet light source 3 to move toward the side of the second filter part 202. On the contrary, when the driving rod 6 moves upward along the driving groove, the ultraviolet light source 3 is moved to the side of the second filter part 202. When moving, the driving rod 6 will drive the multiple ultraviolet light sources 3 to move toward the side of the first filter part 201 through the multiple connecting rods 7. The advantages are: first, the diagonal support plate 8 can improve the connectivity and stability between the rotating shaft 4 and the circular tube 2, and when the rotating shaft 4 rotates, the diagonal support plate 8 can further improve the stirring effect of the reaction liquid; second, by controlling the position of the driving rod 6 in the driving groove, the multiple ultraviolet light sources 3 can be controlled to move synchronously in the corresponding circular tube 2, so as to achieve synchronous control of the positions of the multiple ultraviolet light sources 3 in the corresponding circular tube 2 through a power source (that is, a linear driving mechanism that drives the driving rod 6 to move along the driving groove), and then switch the wavelength range of the ultraviolet light emitted by the circular tube 2; third, when the driving rod 6 moves to the bottom end of the driving groove, it can synchronously drive the multiple ultraviolet light sources 3 to squeeze the blocking plate 204, so as to release the fixation of the fixing rod 207 to the second filter part 202, complete the disassembly of the multiple second filter parts 202 or the ultraviolet light sources 3, and facilitate synchronous replacement or maintenance.

[0047] Furthermore, a clamping assembly is provided at the bottom of the driving rod 6, which is used to force the driving rod 6 to move upward, and a stopper 9 is provided at the top of the driving rod 6. Specifically, the clamping assembly can adopt an elastic member in the prior art, and preferably, the clamping assembly includes an insertion rod 10 fixed to the inner wall of the movable cavity 5, a slot is configured at the bottom end of the driving rod 6 along its length direction, the insertion rod 10 is slidably arranged in the slot, a first spring 11 is fixed to the inner wall of the slot, and the other end of the first spring 11 is fixed to the insertion rod 10 to force the driving rod 6 to move upward relative to the insertion rod 10, and an open slot 12 connected to the driving slot is configured at the top end of the rotating shaft 4, and the stopper 9 is arranged in the open slot 12. The purpose of such a setting is that the elastic force of the first spring 11 can make the driving rod 6 move upward relative to the insertion rod 10, that is, the elastic force of the first spring 11 can make the driving rod 6 move upward along the driving groove, so that the ultraviolet light source 3 is close to the side of the rotating shaft 4 (that is, the side of the first filter part 201), and at the same time, the block 9 is set at different positions of the open groove 12, and the block 9 can cooperate with the first spring 11 to limit the driving rod 6, thereby synchronously limiting the positions of multiple ultraviolet light sources 3 in the corresponding circular tube 2; when the block 9 squeezes the driving rod 6 to move to the bottom end of the driving groove, it can drive the multiple ultraviolet light sources 3 to squeeze the sealing plate 204, and then disassemble the multiple second filter parts 202 and the ultraviolet light sources 3. The advantage is that, by fixing the stopper 9 at different positions in the open groove 12, the driving rod 6 can be restricted to different positions of the driving groove by the stopper 9 and the first spring 11, thereby restricting the multiple ultraviolet light sources 3 to different positions in the corresponding circular tube 2, so as to switch the wavelength range of the ultraviolet light emitted by the circular tube 2; when the control block 9 is used to squeeze the driving rod 6 downward, it can press the driving rod 6 to the bottom end of the driving groove, thereby disassembling the multiple second filtering parts 202 and the ultraviolet light source 3.

[0048] Furthermore, the reactor 1 is provided with a top cover 13, on which a connecting plate 14 is rotatably connected, and the stopper 9 is slidably connected to the connecting plate 14, and also includes a limiting mechanism, which is used to limit the relative position of the stopper 9 and the connecting plate 14. Specifically, the top cover 13 can be fixed on the reactor 1 by a locking mechanism, and the rotating shaft 4 can be protected by the top cover 13. The connecting plate 14 is adapted to the open groove 12. Preferably, the cross-sections of the connecting plate 14 and the open groove 12 are both polygonal, that is, when the connecting plate 14 is inserted into the open groove 12, the connecting plate 14 rotates with the rotating shaft 4, and the connecting plate 14 is constructed with a through groove 15 adapted to the driving rod 6 along its length direction, and the stopper 9 is slidably arranged in the through groove 15. The limiting mechanism can be a snap mechanism or a bolt mechanism in the prior art to limit the stopper 9 in the through groove 15. Before fixing the top cover 13, the stopper 9 is first restricted to the appropriate position of the connecting plate 14 by the limiting mechanism, and then the connecting plate 14 is inserted into the open groove 12. At the same time, the driving rod 6 is inserted into the through groove 15, so that the stopper 9 in the through groove 15 resists the driving rod 6, and then the top cover 13 is continuously pressed down and fixed on the reactor 1, and then the driving rod 6 is restricted to the appropriate position of the driving groove by the stopper 9 and the first spring 11. The advantages are that, first, the stopper 9 is set on the top cover 13, and while the top cover 13 is fixed to protect the rotating shaft 4, the drive rod 6 can also be restricted by the stopper 9 on the top cover 13; second, when the rotating shaft 4 rotates, the inner wall of the open groove 12 will force the connecting plate 14 to rotate synchronously. Since the top cover 13 is rotatably connected with the connecting plate 14, the connecting plate 14 will not drive the top cover 13 to rotate, so as to maintain the restriction of the drive rod 6 by the stopper 9; third, when the stopper 9 is restricted at the end of the connecting plate 14, pressing down the top cover 13 can move the drive rod 6 to the bottom end of the driving groove through the stopper 9, thereby disassembling the multiple second filtering parts 202 and the ultraviolet light source 3.

[0049] In another embodiment of the present invention, as an alternative to the above-mentioned limiting method of the block 9, further, the limiting mechanism includes a movable groove 16 constructed on the block 9, a limiting rod 17 is inserted in the movable groove 16, a plurality of limiting holes 18 adapted to the limiting rod 17 are constructed on the connecting plate 14, and a driving assembly is arranged in the movable groove 16. Specifically, the limiting rod 17 is passed through the stopper 9. When the stopper 9 moves along the through groove 15, the limiting rod 17 moves out of the movable groove 16 and can be inserted into the corresponding limiting hole 18, so that the relative position of the stopper 9 and the connecting plate 14 is limited by the limiting rod 17 and the limiting hole 18. The driving assembly can be a linear driving mechanism in the prior art, thereby driving the limiting rod 17 to move out of or into the movable groove 16, thereby limiting the position of the stopper 9. Preferably, four limiting holes 18 are sequentially constructed to correspond to different positions of the above-mentioned stopper 9, that is, to limit the three positions of the stopper 9 when the ultraviolet light source 3 is in three different positions of the circular tube 2, and the top cover 13 can be pressed down to move the driving rod 6 to the bottom end of the driving groove through the stopper 9. The position of the block 9 (when the block 9 is at the end of the connecting plate 14) has the advantage that, before fixing the top cover 13, the limiting rod 17 is first driven by the driving mechanism to move into the movable groove 16, so that the block 9 can move along the through groove 15; after the block 9 moves to a suitable position, the limiting rod 17 is driven by the driving mechanism to move out of the movable groove 16 and inserted into the corresponding limiting hole 18, thereby completing the restriction of the relative position of the block 9 and the connecting plate 14, thereby restricting the multiple ultraviolet light sources 3 in the corresponding circular tube 2 when the top cover 13 is fixed; when the block 9 is restricted at the end of the connecting plate 14, the connecting plate 14 is inserted into the open groove 12 to force the driving rod 6 to move to the bottom of the driving groove, so as to drive the multiple ultraviolet light sources 3 to squeeze the blocking plate 204.

[0050] Furthermore, the bottom of the block 9 is configured with a connection hole 19 connected to the movable groove 16, the driving rod 6 is adapted to the connection hole 19, a clamping block 20 is fixed on the limiting rod 17, and a clamping groove is configured on the driving rod 6. Specifically, the top of the connection hole 19 does not penetrate the block 9, and after the driving rod 6 is inserted into the connection hole 19, it is restricted by the block 9 and cannot move upward relative to the block 9. Since the connection hole 19 is connected to the movable groove 16, after the driving rod 6 extends into the connection hole 19, the driving rod 6 can be restricted in the connection hole 19 by controlling the clamping block 20 to extend into the clamping groove. The purpose of such a setting is that before fixing the top cover 13, the limiting rod 17 is first controlled to extend out of the movable groove 16 and extend into the corresponding limiting hole 18, thereby completing the fixation of the position of the block 9, and then the limiting rod 17 is continued to be controlled to move outside the movable groove 16, so that the limiting rod 17 continues to extend into the limiting hole 18. When the limiting rod 17 moves to the position where the block 20 is disengaged from the connecting hole 19, the driving rod 6 can be inserted into the connecting hole 19, and then the limiting rod 17 is controlled to move a certain distance into the movable groove 16, so that the block 20 moves into the slot (when the block 20 contacts the inner wall of the slot, the limiting rod 17 will not disengage from the limiting hole 18, that is, when the limiting rod 17 restricts the driving rod 6, it also maintains the restriction on the relative position of the block 9 and the connecting plate 14), thereby limiting the relative position of the driving rod 6 and the block 20. The advantage is that, by controlling the movement of the limiting rod 17, the relative position of the block 9 and the connecting plate 14 can be limited first, and then the relative position of the block 9 and the driving rod 6 can be limited, so as to ensure that after the top cover 13 is fixed, the driving rod 6 will not squeeze the first spring 11 downward and displace (when the rotating shaft 4 rotates, the ultraviolet light source 3 will move away from the rotating shaft 4 under the action of centrifugal force, which will cause it to move between the first filter part 201 and the second filter part 202, thereby causing a certain impact on the wavelength range of the ultraviolet light. At the same time, the ultraviolet light source 3 will also drive the driving rod 6 to move downward through the connecting rod 7. After the driving rod 6 is restricted by setting the block 20, the above situation can be avoided as much as possible) to improve the stability of the photochemical reaction in the reactor 1.

[0051] In another embodiment provided by the present invention, as an alternative to the driving method of the limiting rod 17, the driving assembly further includes an adjusting screw 21 rotatably connected to the stopper 9, the adjusting screw 21 extends into the movable groove 16, a wedge block 22 is slidably connected in the movable groove 16, the wedge block 22 is threadedly connected to the adjusting screw 21, the side of the wedge block 22 opposite to the block 20 is configured as an inclined surface, and a second spring 23 is sleeved on the limiting rod 17. Specifically, one end of the adjusting screw 21 extends outside the block 9, and a knob is fixed on the adjusting screw 21 (a space for the knob to move is configured in the open groove 12), which is convenient for personnel to operate; the wedge block 22 is slidably connected to the movable groove 16 through a square sliding rod. When the adjusting screw 21 is rotated, the adjusting screw 21 and the block 9 rotate relative to each other and drive the wedge block 22 to move in the movable groove 16 (the block 20 is set on one side of the connecting hole 19, and the wedge block 22 is set on the other side adjacent to the block 20, that is, The wedge block 22 can move closer to or farther from the connecting hole 19 and the side of the block 20); the two ends of the second spring 23 are respectively fixed on the block 20 and the inner wall of the movable groove 16, which is used to force the block 20 and the limiting rod 17 to move inside the movable groove 16. The block 20 is configured with a first inclined surface 24 on the side close to the wedge block 22, and a second inclined surface 25 at the bottom of the block 20. The effect of such a configuration is that when the wedge block 22 is in a position to fit the inner wall of the movable groove 16, the inclined surface of the wedge block 22 and the block 2 0 is fitted, thereby limiting the block 20 from continuing to move into the movable groove 16 under the action of the second spring 23. At this time, the block 20 is in the connecting hole 19, and the second inclined portion 25 of the block 20 extends into the connecting hole 19 for a certain distance. The portion of the block 20 extending into the connecting hole 19 can also limit the drive rod 6 from being inserted into the connecting hole 19 (that is, the drive rod 6 can only contact the bottom wall of the block 20, and cannot contact the second inclined portion 25 of the block 20). When it is necessary to fix the top cover 13, first move the stopper 20 to the bottom wall of the block 20. 9 is moved to a suitable position, and the knob is turned, thereby driving the wedge block 22 to approach the side of the card block 20. Through the resistance of the inclined surface of the wedge block 22 to the first inclined surface 24 of the card block 20, the card block 20 can be driven to squeeze the second spring 23 and move to the outside of the movable groove 16, thereby driving the limiting rod 17 to insert into the corresponding limiting hole 18 to complete the restriction of the relative position of the stopper 9 and the connecting plate 14. At this time, the card block 20 is in the connecting hole 19, and only the second inclined surface 25 of the card block 20 extends into the connecting hole 19;When fixing the top cover 13, the connecting plate 14 is inserted into the open groove 12, and at the same time, the driving rod 6 is inserted into the connecting hole 19. At this time, the top cover 13 is pressed down. Under the dual action of the first spring 11 and the pressing down of the top cover 13, the driving rod 6 contacts the second inclined surface 25 of the block 20 and forces the block 20 to continue to move out of the movable groove 16 until the driving rod 6 is completely inserted into the connecting hole 19 (it should be noted that at this time, the wedge block 22 is in the movable groove 16 and is located on one side of the connecting hole 19, and does not enter the connecting hole 19 to avoid hindering the driving rod 6 from entering the connecting hole 19). Under the action of the second spring 23, the block 2 0 moves into the movable groove 16 and is inserted into the card slot, thereby completing the restriction of the relative position of the driving rod 6 and the block 9; the top cover 13 is pressed down to the position of contacting the reactor 1 and fixed by the locking mechanism, at this time, the reactor 1 can be passed with the liquid to be reacted to perform a photochemical reaction; when it is necessary to adjust the position of the ultraviolet light source 3 in the round tube 2, the top cover 13 is removed by the locking mechanism, and the driving rod 6 will move above the open groove 12 under the action of the first spring 11. When the driving rod 6 leaks out of the open groove 12 (under the action of the first spring 11, the driving rod 6 can move to a certain distance above the open groove 12) The knob is continuously turned to make the wedge block 22 continue to force the block 20 to move out of the movable groove 16 until the block 20 is disengaged from the groove, so that the driving rod 6 can be disengaged from the block 9, which facilitates the removal of the top cover 13, or the position of the block 9 is adjusted to change the position of the ultraviolet light source 3 in the round tube 2 (at this time, the wedge block 22 is in the movable groove 16 and has not moved into the connecting hole 19, so as to avoid hindering the driving rod 6 from being disengaged from the connecting hole 19); when it is necessary to remove multiple second light filtering parts 202 and ultraviolet light sources 3, the block 9 is moved to the end of the connecting plate 14, and the knob is turned to move the wedge block 22 to the connecting hole 19. The connecting hole 19 is inserted into the connecting hole 19 to block the driving rod 6 from entering the connecting hole 19. At the same time, the limiting rod 17 is inserted into the corresponding limiting hole 18 and moved to the position of the protruding connecting plate 14. Then the connecting plate 14 is inserted into the open groove 12 and the top cover 13 is pressed downward (there is a space for the limiting rod 17 to move in the open groove 12). When the top cover 13 is pressed, the driving rod 6 can be blocked by the wedge block 22 in the connecting hole 19 to force the driving rod 6 to move to the bottom of the driving groove, thereby simultaneously squeezing the multiple blocking plates 204, and then the multiple second filter parts 202 and the ultraviolet light source 3 can be disassembled. ;

[0052] The advantage of the above embodiment is that the wedge block 22 can have four positions by turning the knob: first, when the wedge block 22 is attached to the inner wall of the movable groove 16, the stopper 9 is not fixed to the connecting plate 14, and the driving rod 6 cannot be inserted into the connecting hole 19; second, when the wedge block 22 moves a certain distance toward the block 20, it forces the limiting rod 17 to move into the limiting groove to limit the relative position of the stopper 9 and the connecting plate 14, and the driving rod 6 can be inserted into the connecting hole 19. When the driving rod 6 is inserted into the connecting hole 19, the relative position of the driving rod 6 and the stopper 9 can be limited by the block 20; third, when the wedge block 22 continues to move toward the block 20, it can It is enough to force the block 20 to continue to move out of the movable groove 16 until the block 20 is separated from the groove, so that the driving rod 6 can be separated from the block 9 to adjust the position of the block 9, and then adjust the position of the ultraviolet light source 3 in the circular tube 2; fourthly, when it is necessary to disassemble the multiple second filter parts 202 and the ultraviolet light source 3, the block 9 is moved to the end of the connecting plate 14, and the knob is turned to move the wedge block 22 into the connecting hole 19 to block the driving rod 6 from entering the connecting hole 19, and then the top cover 13 is pressed down to simultaneously force the multiple ultraviolet light sources 3 to squeeze the corresponding blocking plates 204, so as to disassemble the multiple second filter parts 202 and the ultraviolet light source 3.

[0053] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A negative pressure continuous photochemical reactor, comprising a reaction kettle, characterized in that: Also includes: A plurality of circular tubes are provided, wherein the circular tubes are hollow inside and have a first light filtering portion and a second light filtering portion; A plurality of ultraviolet light sources are provided and are respectively located in the corresponding circular tubes, and the length of the ultraviolet light source is shorter than the length of the first filter part or the second filter part; A driving mechanism, used for synchronously driving the plurality of ultraviolet light sources to move between the corresponding first light filtering parts and the second light filtering parts; A rotating shaft is rotatably connected in the reactor, and the plurality of round tubes are fixed on the rotating shaft; The driving mechanism comprises an active cavity constructed in the rotating shaft, a driving rod is slidably connected in the active cavity, a connecting rod is hingedly connected to the driving rod at a position corresponding to the circular tube, and the other end of the connecting rod is hingedly connected to the ultraviolet light source.

2. A negative pressure continuous photochemical reactor according to claim 1, characterized in that: Slide blocks are fixed at both ends of the ultraviolet light source, and the slide blocks are fitted with the inner wall of the circular tube.

3. A negative pressure continuous photochemical reactor according to claim 2, characterized in that: The first filter part and the second filter part are detachably connected.

4. A negative pressure continuous photochemical reactor according to claim 3, characterized in that: A clamping assembly is arranged at the bottom of the driving rod, which is used to force the driving rod to move upward, and a stopper is arranged at the top of the driving rod.

5. A negative pressure continuous photochemical reactor according to claim 4, characterized in that: The reactor is provided with a top cover, a connecting plate is rotatably connected to the top cover, the stopper is slidably connected to the connecting plate, and a limiting mechanism is also included, which is used to limit the relative position of the stopper and the connecting plate.

6. A negative pressure continuous photochemical reactor according to claim 5, characterized in that: The limiting mechanism comprises a movable groove constructed on the stopper, a limiting rod is inserted into the movable groove, a plurality of limiting holes adapted to the limiting rod are constructed on the connecting plate, and a driving assembly is arranged in the movable groove.

7. A negative pressure continuous photochemical reactor according to claim 6, characterized in that: A connecting hole communicating with the movable groove is configured at the bottom of the stopper, the driving rod is adapted to the connecting hole, a clamping block is fixed on the limiting rod, and a clamping groove is configured on the driving rod.

8. A negative pressure continuous photochemical reactor according to claim 6 or 7, characterized in that: The driving assembly includes an adjusting screw rotatably connected to the stopper, the adjusting screw extends into the movable groove, a wedge block is slidably connected in the movable groove, the wedge block is threadedly connected to the adjusting screw, the side of the wedge block opposite to the blocking block is constructed as an inclined surface, and a second spring is sleeved on the limiting rod.

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