Telescopic purification atomic absorption cover

Abstract

The utility model relates to the technical field of atomic absorption covers, in particular to a telescopic purification atomic absorption cover. Comprising an absorption cover, the top of the absorption cover is fixedly connected with an extension pipe, the outer wall of the extension pipe is slidably sleeved with a sleeve, the upper end of the sleeve is fixedly connected with an assembly cylinder, and the outer wall of the assembly cylinder is slidably connected with a rail box. After the elliptical wheel is rotated and the limitation between the sleeve and the track box is released, the assembly cylinder can horizontally move along the inner wall of the track box, the position of the absorption cover is horizontally adjusted, and after the absorption cover is adjusted to a preset position, the position of the sleeve below the track box can be limited by loosening the elliptical wheel, so that the absorption cover is prevented from displacing during use; when the shaft pipe is rotated, the extension pipe can be driven to vertically move along the inner wall of the sleeve, the position of the absorption cover is adjusted up and down, then the absorption cover is adjusted to any position below the track box according to work needs, and the utilization rate of the absorption cover is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of atomic absorption covers, in particular to a telescopic purification atomic absorption cover. Background Art

[0002] The atomic absorption hood is commonly known as the exhaust hood. The atomic absorption hood is mainly suitable for large-scale precision instruments such as atomic absorption instruments that involve high temperatures and require local exhaust. It is required to be positioned and installed according to the requirements of the instrument and is made of 304 stainless steel. The atomic absorption hood is a device that quickly discharges gases, heat and other harmful substances emitted by instruments such as spectrophotometers and gas chromatographs during use to the outside of the room.

[0003] The utility model with authorization announcement number CN218168145U provides a telescopic purification atomic absorption hood. By removing the bolts on the mounting base, the adjustment bracket can be taken out from the telescopic tube, so that the filter installed on the adjustment bracket can be taken out together, thereby facilitating the replacement of the filter. However, in this patent, the position of the absorption hood cannot be adjusted laterally according to work needs, resulting in a low utilization rate of the absorption hood. In view of this, we propose a telescopic purification atomic absorption hood. Utility Model Content

[0004] The purpose of the utility model is to provide a telescopic purification atomic absorption cover to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, one of the purposes of the present utility model is to provide a telescopic purification atomic absorption hood, including an absorption hood, an extension tube fixedly connected to the top of the absorption hood, a sleeve slidingly provided on the outer wall of the extension tube, an assembly cylinder fixedly connected to the upper end of the sleeve, a track box slidingly connected to the outer wall of the assembly cylinder, a locking mechanism provided on one side of the sleeve, the locking mechanism limits the position of the sleeve below the track box, a height adjustment mechanism is provided on the sleeve, the height adjustment mechanism is used to drive the extension tube to move along the inner wall of the sleeve, and adjust the distance between the absorption hood and the track box. When the height adjustment mechanism acts on the locking mechanism, the locking mechanism releases the limit of the assembly cylinder on the track box.

[0006] As a further improvement of the present technical solution, the height adjustment mechanism includes two hollow frames, which are respectively fixedly connected to the inner walls of the extension tube and the sleeve. The side walls of the hollow frames in the sleeve are rotatably connected to a screw rod, which is threadedly connected to the hollow frames in the extension tube. The side walls of the sleeve are rotatably connected to a shaft tube, and bevel gears are fixedly connected to the outer wall of the shaft tube and the screw rod, and the two bevel gears are meshed with each other.

[0007] As a further improvement of this technical solution, the two ends of the shaft tube pass through the two sides of the sleeve respectively, and the inner wall of the shaft tube is slidably connected to a rotating rod. One end of the rotating rod extends to the outside of the shaft tube and is fixedly connected to an end block, and the other end of the rotating rod extends to the outside of the shaft tube and is fixedly connected to a knob.

[0008] As a further improvement of the present technical solution, the locking mechanism includes a positioning block fixedly connected to one side of the sleeve, and tension springs are symmetrically fixedly connected on both sides of the positioning block. One end of the tension spring is fixedly connected to a clamping rod, and the lower end of the clamping rod is rotatably connected to one side of the sleeve. Embedded grooves are symmetrically opened on both sides of the track box, and a rubber pad is fixedly connected to the upper end face of the clamping rod, and the rubber pad is squeezed into fit with the inner wall of the embedded groove.

[0009] As a further improvement of the present technical solution, an elliptical wheel is provided between the two clamping rods, and the elliptical wheel is rotatably connected to one side of the sleeve. A mating groove is provided on the side wall of the elliptical wheel. By inserting the end block into the mating groove, the rotating rod drives the elliptical wheel to rotate synchronously.

[0010] As a further improvement of this technical solution, a filter is provided in the extension tube below the sleeve, one end of the filter passes through one side of the extension tube and is fixedly connected to a mounting plate, and the mounting plate is fixedly connected to the extension tube by screws.

[0011] As a further improvement of this technical solution, an exhaust pipe is fixedly connected to one side of the track box, a corrugated hose is fixedly connected to one side of the assembly tube located inside the track box, and one end of the corrugated hose is fixedly connected to the exhaust pipe.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The telescopic purification atomic absorption hood can horizontally move the assembly cylinder along the inner wall of the track box after rotating the elliptical wheel to release the limit between the sleeve and the track box, and horizontally adjust the position of the absorption hood. After the absorption hood is adjusted to a predetermined position, the elliptical wheel can be released to limit the position of the sleeve below the track box, thereby avoiding displacement of the absorption hood during use and affecting the normal use of the absorption hood. When the shaft tube is rotated, the extension tube can be driven to move vertically along the inner wall of the sleeve to adjust the position of the absorption hood up and down, and then the absorption hood can be adjusted to any position below the track box according to work needs, thereby increasing the utilization rate of the absorption hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a structural diagram of the height adjustment mechanism of the present utility model;

[0016] Figure 3This is a schematic structural diagram of the locking mechanism of the present utility model;

[0017] Figure 4 This is a schematic structural diagram of the rotating rod, end block and elliptical wheel of the utility model.

[0018] The meaning of each number in the figure is:

[0019] 1. Absorption hood; 2. Extension tube; 3. Sleeve; 4. Track box; 5. Assembly tube; 6. Corrugated hose;

[0020] 7. Height adjustment mechanism; 71. Hollow frame; 72. Screw; 73. Bevel gear; 74. Shaft tube; 75. Rotating rod; 76. End block;

[0021] 8. Locking mechanism; 81. Positioning block; 82. Tension spring; 83. Clamping rod; 84. Oval wheel; 85. Embedded groove;

[0022] 9. Filter. DETAILED DESCRIPTION

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

[0024] Example 1

[0025] See also Figure 1-Figure 4 As shown, this embodiment provides a telescopic purification atomic absorption cover, including an absorption cover 1, an extension tube 2 is fixedly connected to the top of the absorption cover 1, a sleeve 3 is slidingly sleeved on the outer wall of the extension tube 2, an assembly cylinder 5 is fixedly connected to the upper end of the sleeve 3, and a track box 4 is slidingly connected to the outer wall of the assembly cylinder 5. A locking mechanism 8 is provided on one side of the sleeve 3, and the locking mechanism 8 limits the position of the sleeve 3 below the track box 4, thereby locking the position of the absorption cover 1 to prevent the absorption cover 1 from being displaced by external forces during use, affecting the normal use of the absorption cover 1, and a height adjustment mechanism is provided on the sleeve 3. Mechanism 7, the height adjustment mechanism 7 is used to drive the extension tube 2 to move along the inner wall of the sleeve 3, adjust the distance between the absorption cover 1 and the track box 4, and adjust the height of the absorption cover 1 up and down according to work needs. When the height adjustment mechanism 7 acts on the locking mechanism 8, the locking mechanism 8 releases the limit of the assembly cylinder 5 on the track box 4. After releasing the limit of the assembly cylinder 5 on the track box 4, the assembly cylinder 5 can be moved along the inner wall of the track box 4. The assembly cylinder 5 drives the track box 4, the sleeve 3, the extension tube 2 and the absorption cover 1 to move synchronously, and then the position of the absorption cover 1 is adjusted horizontally according to work needs.

[0026] One side of the track box 4 is fixedly connected to an exhaust pipe, one end of the exhaust pipe is connected to an external air pump, and one side of the assembly tube 5 is fixedly connected to a corrugated hose 6 located inside the track box 4, one end of the corrugated hose 6 is fixedly connected to the exhaust pipe. After the external air pump is started, the gas containing harmful substances is sucked into the absorption cover 1, and the gas in the absorption cover 1 then enters the air pump through the extension tube 2, the sleeve 3, the assembly tube 5, the corrugated hose 6 and the exhaust pipe in turn, and the air pump then discharges the gas to the outside. When the position of the absorption cover 1 is adjusted horizontally, the corrugated hose 6 expands and contracts, which does not affect the gas transmission function of the corrugated hose 6.

[0027] In order to make the extension tube 2 move up and down along the inner wall of the sleeve 3 and lock the position of the extension tube 2 after movement, the following is a detailed description of some structures of the height adjustment mechanism 7. The height adjustment mechanism 7 includes two hollow frames 71, which are fixedly connected to the inner walls of the extension tube 2 and the sleeve 3 respectively. The side wall of the hollow frame 71 in the sleeve 3 is rotatably connected to a screw rod 72, and the screw rod 72 is threadedly connected to the hollow frame 71 in the extension tube 2. The side wall of the sleeve 3 is rotatably connected to a shaft tube 74. The outer wall of the shaft tube 74 and the screw rod 72 are fixedly connected to a bevel gear 73. The two bevel gears 73 are meshed. When the shaft tube 74 is rotated, the shaft tube 7 4 drives one of the bevel gears 73 to rotate, and through the meshing transmission of the two bevel gears 73, the other bevel gear 73 drives the screw rod 72 to rotate. Through the threaded connection between the screw rod 72 and the hollow frame 71 in the extension tube 2, the hollow frame 71 in the extension tube 2 drives the extension tube 2 to move up and down along the inner wall of the sleeve 3. The extension tube 2 drives the absorption cover 1 to move synchronously, thereby adjusting the height of the absorption cover 1. After the absorption cover 1 is moved to a predetermined height, the rotation of the shaft tube 74 is stopped, and the position of the extension tube 2 is locked by the self-locking property of the screw rod 72 and the hollow frame 71 in the extension tube 2, thereby fixing the absorption cover 1 at the predetermined height.

[0028] The cam 76 is connected to the cam 77 by the spring 76 and the spring 77 is connected to the cam 77 by the spring 77. When the cam 77 is in the cam 77 position, the cam 77 is in the cam 77 position, and the cam 77 is in the cam 77 position.

[0029] In order to limit the position of the extension tube 2 under the track box 4, the structure of the locking mechanism 8 is refined below. The locking mechanism 8 includes a positioning block 81 fixedly connected to one side of the sleeve 3, and the positioning block 81 is symmetrically fixedly connected with a tension spring 82 on both sides. One end of the tension spring 82 is fixedly connected with a clamping rod 83, and the lower end of the clamping rod 83 is rotatably connected to one side of the sleeve 3. The track box 4 is symmetrically provided with an embedded groove 85 on both sides, and the upper end face of the clamping rod 83 is fixedly connected with a rubber pad, which is squeezed and fitted with the inner wall of the embedded groove 85. The tension spring 82 is in an elastically stretched state, pulling the clamping rod 83 toward the positioning block 81, so that the two clamping rods 83 cooperate to clamp and fix the track box 4, so that the relative position of the sleeve 3 and the track box 4 will not change, thereby achieving the purpose of locking the position of the absorption cover 1 and ensuring the stability of the absorption cover 1 during use.

[0030] In order to facilitate the release of the limit between the extension tube 2 and the track box 4, an elliptical wheel 84 is provided between the two clamping rods 83. The elliptical wheel 84 is rotatably connected to one side of the sleeve 3, and a mating groove is provided on the side wall of the elliptical wheel 84. By driving the rotating rod 75 to move, the rotating rod 75 slides along the inner wall of the shaft tube 74, so that the rotating rod 75 drives the end block 76 to insert into the mating groove. After the end block 76 is inserted into the mating groove, the rotating rod 75 is twisted to make the rotating rod 75 drive the elliptical wheel 84 to rotate synchronously. After the rotating elliptical wheel 84 contacts the two clamping rods 83, it pushes the two clamping rods 83 to flip in the direction away from the positioning block 81. After the two clamping rods 83 are out of contact with the track box 4, the limit between the extension tube 2 and the track box 4 can be released, and the assembly cylinder 5 is moved along the inner wall of the track box 4 to adjust the position of the absorption cover 1 horizontally.

[0031] In order to prevent the harmful gases sucked in by the absorption hood 1 from being directly discharged outdoors and polluting the environment, a filter 9 is provided in the extension tube 2 below the sleeve 3. The filter 9 filters and purifies the harmful gases sucked in by the absorption hood 1 to prevent the harmful gases from being directly discharged and polluting the environment. One end of the filter 9 passes through one side of the extension tube 2 and is fixedly connected to a mounting plate. The mounting plate and the extension tube 2 are fixedly connected by screws. After unscrewing the screws and removing the mounting plate from the extension tube 2, the filter 9 installed on the mounting plate can be removed from the extension tube 2, making it convenient to replace the filter 9.

[0032] In summary, the working principle of this solution is as follows: when in use, first adjust the position of the absorption cover 1 horizontally, the steps are as follows: after inserting the end block 76 into the matching groove on the elliptical wheel 84, twist the rotating rod 75 to drive the elliptical wheel 84 to rotate synchronously, release the limit between the extension tube 2 and the track box 4, and then move the assembly cylinder 5 along the inner wall of the track box 4. After moving the absorption cover 1 to the predetermined position, release the rotating rod 75, and the tension spring 82 rebounds to pull the clamping rod 83 in the direction close to the positioning block 81, so that the two clamping rods 83 cooperate to clamp and fix the track box 4, so that the relative position of the sleeve 3 and the track box 4 will not change, and then adjust the position of the absorption cover 1 up and down, the steps are as follows: by turning the rotating rod 75 slides along the inner wall of the shaft tube 74, so that the rotating rod 75 drives the end block 76 to move out of the matching groove, and then the rotating rod 75 is twisted, and the rotating rod 75 drives the shaft tube 74 to rotate, so that the hollow frame 71 in the extension tube 2 drives the extension tube 2 to move up and down along the inner wall of the sleeve 3, and the extension tube 2 drives the absorption cover 1 to move synchronously, thereby adjusting the height of the absorption cover 1. After the absorption cover 1 is moved to a predetermined height, the rotation of the shaft tube 74 is stopped, and the position of the extension tube 2 is locked by the self-locking property of the screw rod 72 and the hollow frame 71 in the extension tube 2, and the absorption cover 1 is fixed at a predetermined height. Through the above steps, the absorption cover 1 can be adjusted to any position directly below the track box 4 according to work needs, thereby increasing the utilization rate of the absorption cover 1.

[0033] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A telescopic purification atomic absorption cover, comprising an absorption cover (1), characterized in that: The top of the absorption cover (1) is fixedly connected to an extension tube (2), the outer wall of the extension tube (2) is slidably sleeved with a sleeve (3), the upper end of the sleeve (3) is fixedly connected to an assembly tube (5), the outer wall of the assembly tube (5) is slidably connected to a track box (4), a locking mechanism (8) is provided on one side of the sleeve (3), the locking mechanism (8) limits the position of the sleeve (3) below the track box (4), and a height adjustment mechanism (7) is provided on the sleeve (3), the height adjustment mechanism (7) is used to drive the extension tube (2) to move along the inner wall of the sleeve (3) to adjust the distance between the absorption cover (1) and the track box (4), and when the height adjustment mechanism (7) acts on the locking mechanism (8), the locking mechanism (8) releases the limit of the assembly tube (5) on the track box (4).

2. The telescopic purification atomic absorption cover according to claim 1, characterized in that: The height adjustment mechanism (7) comprises two hollow frames (71), the two hollow frames (71) being fixedly connected to the inner walls of the extension tube (2) and the sleeve (3), respectively; the side wall of the hollow frame (71) in the sleeve (3) is rotatably connected to a screw rod (72); the screw rod (72) is threadedly connected to the hollow frame (71) in the extension tube (2); the side wall of the sleeve (3) is rotatably connected to a shaft tube (74); the outer wall of the shaft tube (74) and the screw rod (72) are both fixedly connected to bevel gears (73), and the two bevel gears (73) are meshed with each other.

3. The telescopic purification atomic absorption cover according to claim 2, characterized in that: The two ends of the shaft tube (74) pass through the two sides of the sleeve (3) respectively. The inner wall of the shaft tube (74) is slidably connected to a rotating rod (75). One end of the rotating rod (75) extends to the outside of the shaft tube (74) and is fixedly connected to an end block (76). The other end of the rotating rod (75) extends to the outside of the shaft tube (74) and is fixedly connected to a knob.

4. The telescopic purification atomic absorption cover according to claim 1, characterized in that: The locking mechanism (8) includes a positioning block (81) fixedly connected to one side of the sleeve (3), and tension springs (82) are symmetrically fixedly connected to both sides of the positioning block (81). One end of the tension spring (82) is fixedly connected to a clamping rod (83), and the lower end of the clamping rod (83) is rotatably connected to one side of the sleeve (3). The track box (4) is symmetrically provided with embedded grooves (85), and the upper end surface of the clamping rod (83) is fixedly connected to a rubber pad, and the rubber pad is squeezed and fitted with the inner wall of the embedded groove (85).

5. The telescopic purification atomic absorption cover according to claim 4, characterized in that: An elliptical wheel (84) is provided between the two clamping rods (83), and the elliptical wheel (84) is rotatably connected to one side of the sleeve (3). A matching groove is provided on the side wall of the elliptical wheel (84). By inserting the end block (76) into the matching groove, the rotating rod (75) drives the elliptical wheel (84) to rotate synchronously.

6. The telescopic purification atomic absorption cover according to claim 1, characterized in that: A filter (9) is provided in the extension tube (2) at a position below the sleeve (3); one end of the filter (9) passes through one side of the extension tube (2) and is fixedly connected to a mounting plate; the mounting plate and the extension tube (2) are fixedly connected by screws.

7. The telescopic purification atomic absorption cover according to claim 1, characterized in that: One side of the track box (4) is fixedly connected to an exhaust pipe, and one side of the assembly cylinder (5) is fixedly connected to a corrugated hose (6) at a position inside the track box (4), and one end of the corrugated hose (6) is fixedly connected to the exhaust pipe.

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