Laboratory ventilation cabinet for hazardous chemicals

Abstract

The utility model discloses a laboratory fume cupboard for hazardous chemicals, which belongs to the technical field of laboratory fume cupboards and comprises a cupboard body, a glass baffle mounted on the surface of the cupboard body and an exhaust hood fixedly connected to the top of the cupboard body, and a lifting component is mounted at the bottom of the cupboard body. A lifting assembly is installed at the bottom of the cabinet body, and a bottom support is placed in a laboratory and is installed and fixed through a locking piece. According to the height requirement of a tester, a servo motor is started through an external control device, under the driving action of the servo motor, a lead screw does uniform-speed circumferential rotation relative to a driving seat, so that a cabinet body is pushed through a connecting rod and a bottom plate, and when the cabinet body is subjected to the thrust action, the cabinet body slides in the longitudinal position relative to supporting legs, so that the test is completed. The height of the cabinet body is adjusted in the longitudinal position, power supply to the servo motor is stopped, and the height of the cabinet body is fixed, so that testers with different heights are matched for testing, and the use effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of laboratory fume hood, more specifically, relate to a dangerous chemical laboratory fume hood. BACKGROUND

[0002] The fume hood is also called the fume hood, and is one of the common equipment in the laboratory, and the most important function is the exhaust function, in the chemical laboratory, various harmful gases, odors, humidity and flammable, explosive, corrosive substances are generated during the experiment operation, in order to protect the safety of the user, prevent the diffusion of the pollution material in the experiment to the laboratory, the fume hood is used near the pollution source.

[0003] Through the search, the existing announcement number for a laboratory fume hood CN209647179U, including the experiment table cabinet body, the experiment table cabinet body includes the experiment table board, the top lining plate, the left lining plate, the right lining plate and the back lining plate, the front of the experiment table cabinet body is provided with the perspective window, the top of the experiment table cabinet body is provided with the fume hood connected with the inside of the experiment table cabinet body, the fume hood is provided with the fan inside; The experiment table cabinet body is provided with two installation guide rails, the two installation guide rails are vertically arranged, a plurality of mounting holes are formed in the two installation guide rails; The inside of the experiment table cabinet body is provided with a plurality of placing platforms, the plurality of placing platforms are arranged along the height direction of the installation guide rail, the placing platform is provided with the elastic mounting strip, the elastic mounting strip is arranged in the arch shape, at least two mounting convex points matched with the mounting hole are arranged on the outer surfaces of the two ends of the elastic mounting strip, and the mounting convex points are inserted into the mounting hole. Under the premise that it does not occupy the experiment table board plane space too much, a plurality of experimental containers are placed, and the subsequent experimental reaction is not affected.

[0004] The common laboratory fume hood is directly placed in the interior of the laboratory, or is fixed by locking piece, but for the test personnel of different heights, since the lifting height of the glass baffle at the front side of the fume hood is strictly limited, the comfort degree in the test process is affected, so the laboratory fume hood for dangerous chemicals is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] 1. Technical problem to be solved

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide a laboratory fume hood for hazardous chemicals. The bottom of the hood is equipped with a lifting assembly, and the base is placed inside the laboratory and secured with locking devices. Based on the height requirements of the test personnel, an external control device activates a servo motor. Driven by the servo motor, the lead screw rotates at a uniform speed relative to the drive seat, thereby pushing the hood through the connecting rod and base plate. When the hood is subjected to thrust, it slides longitudinally relative to the support legs, maintaining the hood in a vertical position to achieve height adjustment. Stopping power to the servo motor fixes the hood height, thus accommodating test personnel of different heights and providing excellent performance.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A laboratory fume hood for hazardous chemicals includes a cabinet body, a glass baffle installed on the surface of the cabinet body, and an exhaust hood fixedly connected to the top of the cabinet body. A lifting assembly is installed at the bottom of the cabinet body.

[0010] The lifting assembly includes a base plate symmetrically welded to the lower surface of the cabinet, connecting rods welded to the end face of the base plate, a drive seat welded between the two sets of connecting rods, a threaded hole on the surface of the drive seat, a lead screw inserted through the threaded hole of the drive seat, a servo motor fixedly connected to the end of the lead screw, and a base support fixedly connected to the bottom of the servo motor. The lifting assembly is installed at the bottom of the cabinet, and the base support is placed inside the laboratory and fixed in place by locking devices. According to the height requirements of the test personnel, the servo motor is started via an external control device. Driven by the servo motor, the lead screw rotates at a uniform speed relative to the drive seat, thereby pushing the cabinet through the connecting rods and the base plate. When the cabinet is subjected to thrust, the cabinet slides longitudinally relative to the support legs, maintaining the cabinet in a longitudinal position to achieve height adjustment. Stopping the power supply to the servo motor fixes the cabinet height, thus accommodating test personnel of different heights and providing good performance.

[0011] Preferably, a guide groove is provided on the lower surface of the cabinet, and a guide ring is fixedly connected to the opening position of the guide groove on the lower surface of the cabinet.

[0012] Preferably, a support leg is inserted through the inside of the guide ring, and the through end of the support leg extends into the inside of the guide groove.

[0013] Preferably, the bottom of the support leg is fixedly connected to the base, and a limiting ring is fitted around the outside of the support leg for fixed connection.

[0014] Preferably, the connecting rod is fixedly connected to the cabinet via a reinforcing base, and the surface of the base is provided with an assembly groove, with the servo motor installed inside the assembly groove.

[0015] Preferably, the surface of the base is provided with symmetrical mounting holes and clearance grooves.

[0016] Preferably, a limiting seat is fixedly connected to the surface of the base, and a rubber plate is adhered to the end face of the limiting seat.

[0017] 3. Beneficial effects

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] (1) The bottom of the cabinet in this solution is equipped with a lifting component. The base is placed inside the laboratory and fixed by locking components. According to the height requirements of the test personnel, the servo motor is started by the external control device. Under the drive of the servo motor, the lead screw rotates at a constant speed relative to the drive seat, thereby pushing the cabinet through the connecting rod and the base plate. When the cabinet is subjected to the thrust, the cabinet slides in the longitudinal position relative to the support leg, keeping the cabinet in the longitudinal position to achieve height adjustment. When the power supply to the servo motor is stopped, the height of the cabinet is fixed, thus accommodating test personnel of different heights for testing. The effect of use is good.

[0020] (2) The bottom support of this solution is fixedly connected to a limit seat. A rubber plate is glued to the end face of the limit seat. When adjusting the cabinet, the limit seat and the rubber plate support and fix the cabinet, which has good stability. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the bottom structure of the cabinet of this utility model;

[0023] Figure 3 This is a schematic diagram of the drive base and servo motor structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the base and support leg structure of this utility model.

[0025] Explanation of the labels in the diagram:

[0026] 1. Cabinet body; 2. Glass baffle; 3. Exhaust hood; 4. Base support; 5. Support leg; 501. Limit ring; 6. Guide ring; 7. Base plate; 8. Connecting rod; 9. Drive seat; 10. Servo motor; 11. Lead screw; 12. Reinforcing seat; 13. Assembly slot; 14. Limit seat; 15. Rubber plate; 16. Clearance slot. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] Example 1:

[0029] Please see Figures 1-4 A laboratory fume hood for hazardous chemicals includes a cabinet body 1, a glass baffle 2 installed on the surface of the cabinet body 1, and an exhaust hood 3 fixedly connected to the top of the cabinet body 1. A lifting assembly is installed at the bottom of the cabinet body 1.

[0030] The lifting assembly includes a base plate 7 symmetrically welded to the lower surface of the cabinet 1, a connecting rod 8 welded to the end face of the base plate 7, a drive seat 9 welded between the two sets of connecting rods 8, a threaded hole opened on the surface of the drive seat 9, a lead screw 11 inserted through the threaded hole of the drive seat 9, a servo motor 10 fixedly connected to the end of the lead screw 11, and a base support 4 fixedly connected to the bottom of the servo motor 10.

[0031] A guide groove is provided on the lower surface of the cabinet 1. A guide ring 6 is fixedly connected to the opening of the guide groove on the lower surface of the cabinet 1. A support leg 5 is inserted through the guide ring 6. The through end of the support leg 5 extends into the interior of the guide groove. The bottom of the support leg 5 is fixedly connected to the base 4. A limiting ring 501 is fitted on the outside of the support leg 5 and is fixedly connected. The connecting rod 8 is fixedly connected to the cabinet 1 through the reinforcing seat 12. An assembly groove 13 is provided on the surface of the base 4. The servo motor 10 is installed inside the assembly groove 13.

[0032] It should be noted that a lifting assembly is installed at the bottom of the cabinet 1, and the base 4 is placed inside the laboratory and fixed by locking components. Based on the height requirements of the test personnel, the servo motor 10 is activated via an external control device. Driven by the servo motor 10, the lead screw 11 rotates at a uniform speed relative to the drive seat 9, thereby pushing the cabinet 1 through the connecting rod 8 and the base plate 7. When the cabinet 1 is subjected to thrust, it slides longitudinally relative to the support leg 5, maintaining the cabinet 1 in a longitudinal position to achieve height adjustment. Stopping power to the servo motor 10 fixes the height of the cabinet 1, thus accommodating test personnel of different heights and providing good performance. The stroke of the lead screw 11 can be selected, installed, and adjusted by those skilled in the art according to the needs of use. The servo motor 10 is a forward and reverse reversible motor.

[0033] See Figures 1-4The base 4 has symmetrical mounting holes on its surface and a clearance groove 16 on its surface. A limit seat 14 is fixedly connected to the surface of the base 4, and a rubber plate 15 is bonded to the end face of the limit seat 14.

[0034] It should be noted that the surface of the base 4 is fixedly connected to the limiting seat 14, and the end face of the limiting seat 14 is bonded with a rubber plate 15. When the cabinet 1 is adjusted, the limiting seat 14 and the rubber plate 15 support and fix the cabinet 1, which provides good stability.

[0035] In use: A lifting assembly is installed at the bottom of the cabinet 1, and the base 4 is placed inside the laboratory and fixed by locking components. Based on the height requirements of the test personnel, the servo motor 10 is started via an external control device. Driven by the servo motor 10, the lead screw 11 rotates at a uniform speed relative to the drive seat 9, thereby pushing the cabinet 1 through the connecting rod 8 and the base plate 7. When the cabinet 1 is subjected to thrust, it slides longitudinally relative to the support leg 5, maintaining the cabinet 1 in the longitudinal position to achieve height adjustment. Stopping the power supply to the servo motor 10 fixes the height of the cabinet 1, thus accommodating test personnel of different heights for testing, with good results. The stroke of the lead screw 11 can be selected, installed, and adjusted by those skilled in the art according to the needs of use. The servo motor 10 is a forward and reverse reversible motor. A limit seat 14 is fixedly connected to the surface of the base 4, and a rubber plate 15 is adhered to the end face of the limit seat 14. When adjusting the cabinet 1, the limit seat 14, together with the rubber plate 15, supports and fixes the cabinet 1, providing good stability.

[0036] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A laboratory fume hood for hazardous chemicals, comprising a cabinet (1), a glass baffle (2) installed on the surface of the cabinet (1), and an exhaust hood (3) fixedly connected to the top of the cabinet (1), characterized in that: The bottom of the cabinet body (1) is provided with a lifting assembly; the lifting assembly comprises a bottom plate (7) symmetrically welded to the lower surface of the cabinet body (1), connecting rods (8) welded to the end faces of the bottom plate (7), drive seats (9) welded between the two groups of connecting rods (8), threaded holes opened in the surface of the drive seat (9), lead screws (11) inserted through the threaded holes of the drive seat (9), servo motors (10) fixedly connected to the ends of the lead screws (11), and bottom supports (4) fixedly connected to the bottoms of the servo motors (10); the lower surface of the cabinet body (1) is provided with a guide groove, the guide groove of the lower surface of the cabinet body (1) is fixedly connected with a guide ring (6), the guide ring (6) is inserted through with a supporting leg (5), the penetrating end of the supporting leg (5) extends into the guide groove, the bottom of the supporting leg (5) is fixedly connected with the bottom support (4), and the outer portion of the supporting leg (5) is sleeved with a limiting ring (501) and is fixedly connected.

2. A laboratory fume hood for handling hazardous chemicals as claimed in claim 1, wherein: The connecting rods (8) are fixedly connected with the reinforcing seats (12) and the cabinet body (1), the surface of the bottom support (4) is provided with an assembly groove (13), and the servo motor (10) is mounted in the assembly groove (13).

3. The laboratory fume hood for handling hazardous chemicals according to claim 1, wherein: The surface of the bottom support (4) is symmetrically provided with mounting holes, and the surface of the bottom support (4) is provided with a gap groove (16).

4. The laboratory fume hood for handling hazardous chemicals according to claim 1, wherein: The surface of the bottom support (4) is fixedly connected with a limiting seat (14), and the end face of the limiting seat (14) is bonded with a rubber plate (15).

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