Ventilation cabinet

Abstract

The utility model discloses a ventilation cabinet which comprises a cabinet body, a sliding door and two positioning mechanisms, and the sliding door is arranged on the cabinet body in a sliding mode and can move up and down; the two positioning mechanisms are oppositely arranged on the two sides of the sliding door and comprise a plurality of positioning assemblies arranged from bottom to top, each positioning assembly comprises a positioning piece and an elastic piece, the positioning pieces are arranged on the cabinet body in a sliding mode and can move in the horizontal direction so as to be close to or away from the sliding door, and the elastic pieces are arranged on the cabinet body in a sliding mode. The upper surface, close to the end of the sliding door, of the positioning piece is of an inclined plane structure, and the two ends of the elastic piece are fixedly connected with the positioning piece and the cabinet body respectively. The ventilation cabinet has the advantages that the vertical movement of the sliding door and the positioning of the sliding door by the positioning piece are not influenced by power on and power off, when power is off, the vertical movement of the sliding door and the positioning of the sliding door by the positioning piece can still be carried out, and the applicability of the ventilation cabinet is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory equipment, in particular to a fume hood. Background Art

[0002] A fume hood is one of the most commonly used local exhaust devices in a laboratory. There are various types. When operating in a chemical laboratory, various harmful gases, odors, moisture, and volatile flammable, explosive, and corrosive waste gases will be generated. In order to prevent these pollutants from diffusing into the laboratory space and polluting it, and to protect the personal safety of the operator, the pollution source should be controlled within the fume hood. The waste gas passes through the dedicated ventilation system of the fume hood and is discharged to the dedicated waste gas treatment system, and then discharged into the atmosphere after harmless treatment.

[0003] When the existing fume hood (such as a fume hood sliding door automatic lifting device disclosed in the patent application No. 201420820466.1) is in use, the sliding door is driven to move up and down by an electric drive method. The electric drive method has a self-positioning function to ensure that the sliding door can stay at an appropriate height. However, when the power is cut off, the up and down movement of the sliding door cannot be carried out, resulting in the fume hood being unable to be used normally. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above technical deficiencies and provide a fume hood to solve the technical problem that in the prior art, when the sliding door is driven to move up and down by an electric drive method, the up and down movement of the sliding door cannot be carried out when the power is cut off, resulting in the fume hood being unable to be used normally.

[0005] To achieve the above technical purpose, the technical solution of the utility model provides a fume hood, including:

[0006] A cabinet body;

[0007] A sliding door, which is slidably arranged on the cabinet body and can move up and down;

[0008] Two positioning mechanisms, which are oppositely arranged on both sides of the sliding door. Each positioning mechanism includes a plurality of positioning components arranged from bottom to top. The positioning component includes a positioning member and an elastic member. The positioning member is slidably arranged on the cabinet body and can move horizontally to approach or move away from the sliding door. The upper surface of the end of the positioning member close to the sliding door is a bevel structure. The two ends of the elastic member are respectively fixedly connected to the positioning member and the cabinet body, so that the bevel surface abuts against the bottom surface of the sliding door.

[0009] Further, the positioning member is horizontally arranged.

[0010] Further, the positioning member is a rod-shaped structure.

[0011] Further, the adjacent positioning members in the up and down direction are in sliding contact with each other.

[0012] Further, first sliding grooves are formed in two opposite side walls of the cabinet body. The two first sliding grooves correspond to each other and both extend in the vertical direction. One side of each of the two first sliding grooves communicates with the cavity of the cabinet body. Two sides of the sliding door are respectively and slidably arranged in the corresponding first sliding grooves.

[0013] Further, receiving grooves are also formed in two opposite side walls of the cabinet body. The two receiving grooves are respectively located on the other side of the corresponding first sliding groove. One side of each of the two receiving grooves communicates with the other side of the corresponding first sliding groove. Each positioning member is respectively and slidably arranged in the corresponding receiving groove.

[0014] Further, the bottom surface of the receiving groove is flush with the bottom surface of the first sliding groove, and the top surface of the receiving groove is lower than the top surface of the first sliding groove.

[0015] Further, a plurality of second sliding grooves are formed in two opposite groove walls of the receiving groove at intervals from bottom to top and opposite to each other. Each of the second sliding grooves extends in the horizontal direction. The positioning assembly further includes two sliders. The two sliders are respectively fixed on two sides of the positioning member. Each of the sliders is respectively and slidably arranged in the corresponding second sliding groove.

[0016] Further, a plurality of through holes are formed in two opposite side walls of the cabinet body at intervals from bottom to top and opposite to each other. Each of the through holes is respectively located on the other side of the corresponding receiving groove and extends in the horizontal direction. One end of each of the through holes communicates with the other side of the corresponding receiving groove. The positioning assembly further includes a connecting shaft. One end of the connecting shaft is respectively fixed to the end of the corresponding positioning member away from the sliding door. The other end of each of the connecting shafts respectively and slidably passes through the corresponding through hole and extends out of the cabinet body.

[0017] Further, the positioning assembly further includes a limiting disc. The limiting disc is arranged outside the cabinet body and fixed to the other end of the connecting shaft. The elastic member is a spring. The spring is arranged outside the cabinet body and sleeved on the connecting shaft. Two ends of the spring are respectively fixed to the cabinet body and the limiting disc.

[0018] Compared with the prior art, the beneficial effects of the present utility model include: during use, through the elastic force exerted by the elastic member on the positioning member, the inclined surface on the positioning member can be abutted against the bottom surface of the sliding door, so as to position the sliding door, making the sliding door stay at a preset position. When it is necessary to change the position of the sliding door, if the sliding door is pulled downward, the sliding door will slide downward along the inclined surface on the positioning member and reach the lower positioning member, and will be positioned by the lower positioning member again, ensuring that the sliding door can stay at an appropriate height. The up and down movement of the sliding door and the positioning of the sliding door by the positioning member are not affected by power on and off. When the power is off, the up and down movement of the sliding door and the positioning of the sliding door by the positioning member can still be carried out, improving the applicability of the fume hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic three-dimensional structure diagram of a fume hood provided by the present utility model;

[0020] Figure 2 is Figure 1 a cross-sectional view of a fume hood in

[0021] Figure 3 is Figure 2 an enlarged view of part A in

[0022] Figure 4 is Figure 3 a schematic structural diagram of the one in after omitting the positioning assembly;

[0023] In the figure: 100 - cabinet body, 110 - first chute, 120 - receiving groove, 121 - second chute, 130 - through hole, 200 - sliding door, 300 - positioning mechanism, 310 - positioning assembly, 311 - positioning member, 312 - elastic member, 313 - slider, 314 - connecting shaft, 315 - limiting disc, 400 - baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] The present utility model provides a fume hood, and its structure is as shown in Figure 1 - Figure 3As shown in the figure, it includes a cabinet body 100, a sliding door 200 and two positioning mechanisms 300. The sliding door 200 is slidably arranged on the cabinet body 100 and can move up and down. The two positioning mechanisms 300 are relatively arranged on both sides of the sliding door 200. They include a plurality of positioning components 310 arranged from bottom to top. The positioning component 310 includes a positioning member 311 and an elastic member 312. The positioning member 311 is slidably arranged on the cabinet body 100 and can move in the horizontal direction to approach or move away from the sliding door 200. The upper surface of the end of the positioning member 311 close to the sliding door 200 is a bevel structure. The two ends of the elastic member 312 are respectively fixed to the positioning member 311 and the cabinet body 100, so that the bevel surface abuts against the bottom surface of the sliding door 200.

[0026] During use, due to the elastic force exerted on the positioning member 311 by the elastic member 312, the bevel surface on the positioning member 311 can abut against the bottom surface of the sliding door 200, so as to position the sliding door 200 and make the sliding door 200 stay at a preset position. When it is necessary to change the position of the sliding door 200, if the sliding door 200 is pulled downward, the sliding door 200 will slide downward along the bevel surface on the positioning member 311 and reach the lower positioning member 311, and is positioned by the lower positioning member 311 again. During the process of the sliding door 200 sliding downward along the bevel surface on the positioning member 311, the positioning member 311 will be squeezed, so that the positioning member 311 squeezes the elastic member 312, and the elastic member 312 accumulates elastic potential energy. If the sliding door 200 is pushed upward, the elastic member 312 will release the elastic potential energy, push the positioning member 311 to approach the sliding door 200 again, so that the bevel surface on the positioning member 311 abuts against the bottom surface of the sliding door 200 again, so as to position the sliding door 200 again and ensure that the sliding door 200 can stay at an appropriate height. The up and down movement of the sliding door 200 and the positioning of the sliding door 200 by the positioning member 311 are not affected by power on and off. When the power is off, the up and down movement of the sliding door 200 and the positioning of the sliding door 200 by the positioning member 311 can still be carried out, improving the applicability of the fume hood.

[0027] As a preferred embodiment, please refer to Figure 2 and Figure 3 , the positioning member 311 is horizontally arranged to improve the positioning effect of the positioning member 311 on the sliding door 200.

[0028] As a preferred embodiment, please refer to Figure 2 and Figure 3 , the positioning member 311 is a rod-shaped structure to improve the positioning effect of the positioning member 311 on the sliding door 200.

[0029] As a preferred embodiment, please refer to Figure 2 and Figure 3 , which are in sliding contact with each other between the vertically adjacent positioning members 311, can reduce the distance between the vertically adjacent positioning members 311, thereby reducing the positioning pitch of the sliding door 200.

[0030] As a preferred embodiment, please refer to Figure 2 and Figure 4 , first chutes 110 are provided on two opposite side walls of the cabinet 100. The two first chutes 110 correspond to each other and both extend in the vertical direction. One side of each of the two first chutes 110 communicates with the cavity of the cabinet 100. Two sides of the sliding door 200 are respectively slidably disposed in the corresponding first chutes 110, and the up-and-down movement of the sliding door 200 can be guided through the first chutes 110, improving the stability of the up-and-down movement of the sliding door 200.

[0031] As a preferred embodiment, please refer to Figure 3 and Figure 4 , receiving grooves 120 are further provided on two opposite side walls of the cabinet 100. The two receiving grooves 120 are respectively located on the other side of the corresponding first chutes 110. One side of each of the two receiving grooves 120 communicates with the other side of the corresponding first chute 110. Each of the positioning members 311 is respectively slidably disposed in the corresponding receiving groove 120, and each of the positioning members 311 can be received through the receiving groove 120, improving the stability of the horizontal movement of each of the positioning members 311.

[0032] As a preferred embodiment, please refer to Figure 2 and Figure 4 , the bottom surface of the receiving groove 120 is flush with the bottom surface of the first chute 110, and the top surface of the receiving groove 120 is lower than the top surface of the first chute 110, so that when the sliding door 200 moves upward to the highest position, the inclined surface on the uppermost positioning member 311 can be in contact with the bottom surface of the sliding door 200.

[0033] As a preferred embodiment, please refer to Figure 3 and Figure 4, on two opposite groove walls of the receiving groove 120, a plurality of second sliding grooves 121 are spaced apart and oppositely formed from bottom to top. Each of the second sliding grooves 121 extends in the horizontal direction. The positioning assembly 310 further includes two sliding blocks 313. The two sliding blocks 313 are respectively fixed on both sides of the positioning member 311. Each of the sliding blocks 313 is slidably disposed in the corresponding second sliding groove 121. Through the sliding connection between the sliding block 313 and the second sliding groove 121, the movement of the positioning member 311 in the horizontal direction can be further guided, thereby further improving the stability of the movement of the positioning member 311 in the horizontal direction.

[0034] As a preferred embodiment, please refer to Figure 3 and Figure 4 , on two opposite side walls of the cabinet body 100, a plurality of through holes 130 are also spaced apart and oppositely formed from bottom to top. Each of the through holes 130 is located on the other side of the corresponding receiving groove 120 and extends in the horizontal direction. One end of each of the through holes 130 is respectively communicated with the other side of the corresponding receiving groove 120. The positioning assembly 310 further includes a connecting shaft 314. One end of the connecting shaft 314 is fixedly connected to the end of the corresponding positioning member 311 away from the sliding door 200. The other ends of the connecting shafts 314 respectively slide through the corresponding through holes 130 and extend out of the cabinet body 100, so as to facilitate the connecting shaft 314 to slide through the through hole 130 and dispose the elastic member 312 outside the cabinet body 100.

[0035] As a preferred embodiment, please refer to Figure 3 , the positioning assembly 310 further includes a limiting disc 315. The limiting disc 315 is disposed outside the cabinet body 100 and fixedly connected to the other end of the connecting shaft 314. The elastic member 312 is a spring. The spring is disposed outside the cabinet body 100 and sleeved on the connecting shaft 314. Two ends of the spring are respectively fixedly connected to the cabinet body 100 and the limiting disc 315. During the process that the sliding door 200 slides downward along the inclined surface on the positioning member 311, the positioning member 311 will be extruded, so that the positioning member 311 moves away from the sliding door 200, and further the connecting shaft 314 moves away from the sliding door 200. The elastic member 312 accumulates tensile elastic potential energy. If the sliding door 200 is pushed upward, the elastic member 312 will release the tensile elastic potential energy and push the positioning member 311 to approach the sliding door 200 again, so that the inclined surface on the positioning member 311 abuts against the bottom surface of the sliding door 200 again, thereby the sliding door 200 can be positioned again.

[0036] As a preferred embodiment, please refer to Figure 1 and Figure 2, the fume hood further includes a baffle 400, which is fixedly arranged at the upper part of the opening side of the cavity of the cabinet body 100. When the sliding door 200 moves to the lowest position, it can cooperate with the sliding door 200 to close the opening of the cavity of the cabinet body 100, so as to improve the plugging effect of the sliding door 200 on the opening of the cabinet body 100.

[0037] To better understand the present invention, the working principle of the technical solution of the present invention will be described in detail below in conjunction with Figure 1 - Figure 4 :

[0038] During use, due to the elastic force exerted by the elastic member 312 on the positioning member 311, the inclined surface on the positioning member 311 can be brought into contact with the bottom surface of the sliding door 200, so as to position the sliding door 200 and make the sliding door 200 stay at a preset position. When it is necessary to change the position of the sliding door 200, if the sliding door 200 is pulled downward, the sliding door 200 will slide downward along the inclined surface on the positioning member 311 and reach the lower positioning member 311, and will be positioned by the lower positioning member 311 again. During the process of the sliding door 200 sliding downward along the inclined surface on the positioning member 311, the positioning member 311 will be squeezed, causing the positioning member 311 to move away from the sliding door 200, and further causing the connecting shaft 314 to move away from the sliding door 200, and the elastic member 312 accumulates tensile elastic potential energy. If the sliding door 200 is pushed upward, the elastic member 312 will release the tensile elastic potential energy, push the positioning member 311 to approach the sliding door 200 again, so that the inclined surface on the positioning member 311 is in contact with the bottom surface of the sliding door 200 again, so as to position the sliding door 200 again and ensure that the sliding door 200 can stay at an appropriate height. The up and down movement of the sliding door 200 and the positioning of the sliding door 200 by the positioning member 311 are not affected by power on and off. When the power is off, the up and down movement of the sliding door 200 and the positioning of the sliding door 200 by the positioning member 311 can still be carried out, improving the applicability of the fume hood.

[0039] The fume hood provided by the present invention has the following beneficial effects:

[0040] (1)The elastic force exerted by the elastic member 312 on the positioning member 311 can cause the inclined surface on the positioning member 311 to abut against the bottom surface of the sliding door 200, thereby positioning the sliding door 200 and making the sliding door 200 stay at a preset position. When it is necessary to change the position of the sliding door 200, if the sliding door 200 is pulled downward, the sliding door 200 will slide downward along the inclined surface on the positioning member 311 and reach the lower positioning member 311, and will be positioned by the lower positioning member 311 again. During the process of the sliding door 200 sliding downward along the inclined surface on the positioning member 311, the positioning member 311 will be squeezed, causing the positioning member 311 to move away from the sliding door 200, and further causing the connecting shaft 314 to move away from the sliding door 200. The elastic member 312 accumulates tensile elastic potential energy. If the sliding door 200 is pushed upward, the elastic member 312 will release the tensile elastic potential energy, push the positioning member 311 to approach the sliding door 200 again, and make the inclined surface on the positioning member 311 abut against the bottom surface of the sliding door 200 again, thereby positioning the sliding door 200 again;

[0041] (2)The sliding abutment between the upper and lower adjacent positioning members 311 can reduce the distance between the upper and lower adjacent positioning members 311, thereby reducing the positioning pitch of the sliding door 200;

[0042] (3)The up and down movement of the sliding door 200 and the positioning of the sliding door 200 by the positioning member 311 are not affected by power on and off. When the power is off, the up and down movement of the sliding door 200 and the positioning of the sliding door 200 by the positioning member 311 can still be carried out, improving the applicability of the fume hood.

[0043] The specific embodiments of the present invention described above do not constitute a limitation to the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A fume hood, characterized in that: include: Cabinet; A sliding door is slidably arranged on the cabinet body and can move up and down; Two positioning mechanisms are relatively arranged on both sides of the sliding door, and include a plurality of positioning components arranged from bottom to top. The positioning components include a positioning piece and an elastic piece. The positioning piece is slidably arranged on the cabinet body and can be moved in the horizontal direction to approach or move away from the sliding door. The upper surface of the end of the positioning piece close to the sliding door is a slope structure. The two ends of the elastic piece are respectively fixed to the positioning piece and the cabinet body so that the slope abuts against the bottom surface of the sliding door.

2. The fume hood according to claim 1, characterized in that: The positioning member is arranged horizontally.

3. The fume hood according to claim 1, characterized in that: The positioning member is a rod structure.

4. The fume hood according to claim 1, characterized in that: The upper and lower adjacent positioning members are in sliding contact with each other.

5. The fume hood according to claim 1, characterized in that: A first sliding groove is provided on two opposite side walls of the cabinet body, the two first sliding grooves correspond to each other and extend in the vertical direction, one side of the two first sliding grooves is connected to the cavity of the cabinet body, and the two sides of the sliding door are respectively slidably arranged in the corresponding first sliding grooves.

6. The fume hood according to claim 5, characterized in that: The two opposite side walls of the cabinet are also provided with receiving grooves, the two receiving grooves are respectively located on the other side of the corresponding first sliding groove, one side of the two receiving grooves is respectively connected to the other side of the corresponding first sliding groove, and each positioning member is respectively slidably set in the corresponding receiving groove.

7. The fume hood according to claim 6, characterized in that: The bottom surface of the receiving groove is flush with the bottom surface of the first sliding groove, and the top surface of the receiving groove is lower than the top surface of the first sliding groove.

8. The fume hood according to claim 6, characterized in that: A plurality of second slide grooves are provided on the two opposite groove walls of the receiving groove, which are spaced apart from bottom to top and relatively opened, and each of the second slide grooves extends in a horizontal direction. The positioning assembly also includes two sliders, and the two sliders are respectively fixed on both sides of the positioning member, and each of the sliders is slidably set in the corresponding second slide groove.

9. The fume hood according to claim 6, characterized in that: The two opposite side walls of the cabinet body are also provided with a plurality of through holes which are spaced apart from bottom to top and are relatively opened. Each of the through holes is located at the other side of the corresponding receiving groove and extends in the horizontal direction. One end of each of the through holes is connected with the other side of the corresponding receiving groove. The positioning assembly also includes a connecting shaft, one end of which is fixedly connected to the end of the corresponding positioning member away from the sliding door, and the other end of each of the connecting shafts slides through the corresponding through hole and extends out of the cabinet body.

10. The fume hood according to claim 9, characterized in that: The positioning assembly also includes a limit plate, which is arranged outside the cabinet and fixedly connected to the other end of the connecting shaft. The elastic member is a spring, which is arranged outside the cabinet and sleeved on the connecting shaft. The two ends of the spring are respectively fixedly connected to the cabinet and the limit plate.

Images