Hydraulic door opening type pipe-free ventilation cabinet

Abstract

The utility model discloses a hydraulic door opening type pipe-free ventilation cabinet, which comprises a cabinet body, a gas purifying device and a door opening device, the cabinet body comprises a base and an experiment box body, one side of the experiment box body is provided with protective glass, the top end of the protective glass is provided with a surface wind speed sensor, the gas purifying device comprises a filter frame and a wiring frame, and the door opening device is connected with the filter frame. A first filter and a second filter are arranged at the bottom and the top of the filtering frame respectively, a fan and a gas sensor are arranged in the filtering frame respectively, the door opening device comprises mounting seats and hydraulic supporting rods, and the mounting seats are fixed to the left inner side wall and the right inner side wall of the cabinet body and the left end and the right end of the protective glass respectively; the two ends of each hydraulic supporting rod are movably connected with the two corresponding mounting bases correspondingly. The hydraulic door opening type non-pipe fume hood is advanced in design, compact in structure, convenient to use and easy and labor-saving to operate, has obvious advantages when being applied to non-pipe fume hoods with large sizes, and is worthy of being vigorously popularized.

Description

Technical Field

[0001] The utility model belongs to the technical field of fume hoods, and in particular relates to a hydraulic door-opening type ductless fume hood. Background Art

[0002] In order to prevent laboratory workers from inhaling or swallowing some toxic, pathogenic or unknown toxic chemicals and organisms, the laboratory should have good ventilation. Fume hoods are an indispensable part of laboratory ventilation design. Fume hoods are fully functional and tightly protected. They not only provide comprehensive protection for operators, but also withstand the corrosion of various chemical acids, alkalis and organic reagents, and do not contaminate the internal experimental samples. It ensures the smooth discharge of toxic, harmful and odorous gases, so that the experimental environment can achieve the safety effect specified by national standards. Traditional fume hoods use forced exhaust and ducts to discharge toxic gases outdoors, but the installation of ducts is large and will limit the location of the fume hood. In addition, the direct discharge of toxic and harmful gases without treatment will also pollute the environment. Therefore, ductless fume hoods that can treat exhaust gas and return the treated clean air to the room are widely used.

[0003] There are still some areas that need to be improved in the current ductless fume hoods. For example, when placing experimental materials or cleaning the inner wall of the cabinet, the protective glass needs to be folded and hung upward. When the size of the ductless fume hood is large, not only the height of the upward hanging is higher, but also the distance between the hooks at both ends of the top of the ductless fume hood is farther. The above operation is difficult and inconvenient to the experimenters. Therefore, it is urgent to design a hydraulic door-opening ductless fume hood to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a hydraulic door-opening ductless fume hood to solve the problems existing in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a hydraulic door-opening ductless fume hood, comprising:

[0006] A cabinet, the cabinet comprising a base and an experimental box fixed on the top of the base, a protective glass is provided on one side of the experimental box, and a surface wind speed sensor is provided on the top of the protective glass;

[0007] A gas purification device, the gas purification device comprising a filter frame fixed on the top of the experimental box and a wiring frame fixed on one side of the filter frame, the bottom and the top of the filter frame are respectively provided with a first filter and a second filter, and the inside of the filter frame is respectively provided with a fan and a gas sensor;

[0008] The door opening device comprises a mounting seat and a hydraulic support rod. The mounting seats are respectively fixed to the left and right inner walls of the cabinet and the left and right ends of the protective glass. The two ends of the hydraulic support rod are respectively movably connected to the two corresponding mounting seats.

[0009] Furthermore, the protective glass includes a top protective glass, a middle protective glass and a bottom protective glass which are arranged from top to bottom and hinged in sequence through hinges. The top protective glass is fixedly connected to the cabinet body, and an operating port is provided in the middle of the bottom protective glass.

[0010] Furthermore, there are four mounting seats in total, wherein two of the mounting seats are symmetrically fixed at the bottom ends of the left and right inner walls of the cabinet, and the other two mounting seats are symmetrically fixed at the two ends of the inner wall of the middle protective glass.

[0011] Furthermore, a waste water bucket is provided in the base, and a water inlet on the top of the waste water bucket is sealedly connected to a water outlet at the bottom of the experimental box through a plastic hose.

[0012] Furthermore, a plurality of sockets are provided on one side of the base, and universal wheels are fixed at the four corners of the base.

[0013] Furthermore, the cross-sectional dimensions of the first filter, the second filter and the filter frame are the same, and both the first filter and the second filter are activated carbon filters.

[0014] Furthermore, the outer side walls of the wiring rack are respectively provided with a starting switch, an alarm and a function panel, and the fan, the gas sensor, the starting switch and the alarm are all electrically connected to the function panel.

[0015] The technical effects and advantages of the utility model: the hydraulic door-opening ductless fume hood has advanced design, compact structure and easy use. By setting a mounting seat and a hydraulic support rod, the protective glass can be lifted up and supported from bottom to top by lightly lifting the protective glass to open the cabinet door. The protective glass can be retracted and reset from top to bottom by lightly pressing the protective glass to close the cabinet door. The operation is simple and labor-saving. It has obvious advantages in application to larger-sized ductless fume hoods and is worthy of vigorous promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the cabinet door of the utility model in a closed state;

[0017] Figure 2 This is a right side view of the cabinet door of the utility model in an open state;

[0018] Figure 3 It is a vertical cross-sectional view of the filter frame of the utility model.

[0019] In the figure: 100, cabinet; 101, base; 102, experimental box; 103, protective glass; 1031, top protective glass; 1032, middle protective glass; 1033, bottom protective glass; 104, surface wind speed sensor; 105, hinge; 106, operation port; 107, waste water bucket; 108, socket; 109, universal wheel; 200, air purification device; 201, filter rack; 202, wiring rack; 203, first filter; 204, second filter; 205, fan; 206, gas sensor; 207, start switch; 208, alarm; 209, function panel; 300, door opening device; 301, mounting base; 302, hydraulic support rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The utility model provides Figure 1-3 A hydraulically opened ductless fume hood as shown in the figure comprises:

[0024] The cabinet 100 includes a base 101 and an experimental box 102 fixed on the top of the base 101. A protective glass 103 is provided on one side of the experimental box 102 to facilitate observation of the interior of the experimental box 102 and facilitate experimental operation. A surface wind speed sensor 104 is provided on the top of the protective glass 103 to facilitate monitoring of the wind speed of external air entering the experimental box 102, ensuring that the wind speed is within a reasonable range of 0.4 to 0.6 m / s, thereby ensuring that there is sufficient negative pressure in the experimental box 102 to prevent harmful gases from escaping;

[0025] The air purification device 200 includes a filter frame 201 fixed on the top of the experimental box 102 and a wiring frame 202 fixed on one side of the filter frame 201. The bottom and top of the filter frame 201 are respectively provided with a first filter 203 and a second filter 204. The filter frame 201 is provided with a fan 205 and a gas sensor 206 inside. The gas in the experimental box 102 is continuously moved upward by the adsorption force of the fan 205, and is double-filtered by the first filter 203 and the second filter 204 in turn. The gas sensor 206 can monitor the gas composition passing through the first filter 203. When it is detected that the gas contains harmful components, the first filter 203 can be replaced.

[0026] The door opening device 300 includes a mounting seat 301 and a hydraulic support rod 302. The mounting seats 301 are respectively fixed to the left and right inner walls of the cabinet body 100 and the left and right ends of the protective glass 103. The two ends of the hydraulic support rod 302 are movably connected to the two corresponding mounting seats 301. When the hydraulic support rod 302 is extended, the protective glass 103 can be lifted up and supported, so that the cabinet door can be opened easily. When the hydraulic support rod 302 is retracted, the protective glass 103 can be pulled down and reset, so that the cabinet door can be closed easily. The hydraulic support rod is a kind of hydraulic support rod that can be lifted up and pushed back. An industrial accessory with functions such as support, buffering, braking, height adjustment and angle adjustment, which consists of a pressure cylinder, a piston rod, a piston, a sealing guide sleeve, a filler (inert gas or an oil-gas mixture), an in-cylinder control element, an out-of-cylinder control element (referring to a controllable gas spring) and a joint. Its operating principle is to fill an inert gas or an oil-gas mixture into a closed pressure cylinder to make the pressure in the cavity several times or dozens of times higher than the atmospheric pressure, and to use the pressure difference generated by the cross-sectional area of ​​the piston rod being smaller than the cross-sectional area of ​​the piston to realize the movement of the piston rod. It belongs to the prior art and will not be elaborated here.

[0027] In addition, the protective glass 103 includes a top protective glass 1031, a middle protective glass 1032 and a bottom protective glass 1033 which are arranged from top to bottom and hinged in sequence through hinges 105, so that the protective glass 103 can be folded conveniently, which is beneficial to reducing the space occupied by the protective glass 103 when it is lifted upward. The top protective glass 1031 is fixedly connected to the cabinet 100, and an operating port 106 is provided in the middle of the bottom protective glass 1033, which is convenient for the experimenter to put his hands into the experimental box 102 for operation.

[0028] Specifically, there are four mounting seats 301, among which two mounting seats 301 are symmetrically fixed at the bottom ends of the left and right inner walls of the cabinet 100, and the other two mounting seats 301 are symmetrically fixed at the two ends of the inner wall of the middle protective glass 1032, so as to facilitate lifting the two ends of the middle protective glass 1032 to the same height at the same time through two hydraulic support rods 302.

[0029] It is worth mentioning that a waste water bucket 107 is provided in the base 101. The water inlet on the top of the waste water bucket 107 and the water outlet at the bottom of the experimental box 102 are sealed and connected by a plastic hose, which facilitates the discharge of waste water generated by the experiment from the inside of the experimental box 102 into the waste water bucket 107. This is convenient for operation and can prevent the waste gas emitted by the waste water from entering the laboratory, which is beneficial to maintaining the laboratory environment.

[0030] Specifically, a plurality of sockets 108 are provided on one side of the base 101 , and universal wheels 109 are fixed at the four corners of the base 101 .

[0031] It should be noted that the cross-sectional dimensions of the first filter 203, the second filter 204 and the filter frame 201 are the same, which can ensure that the gas flowing upward in the experimental box 102 will pass through the first filter 203 and the second filter 204, preventing the escape of harmful gases that have not been filtered. The first filter 203 and the second filter 204 both use activated carbon filters, which have good adsorption effects and strong filtering capabilities.

[0032] Specifically, the outer side walls of the wiring rack 202 are respectively provided with a start switch 207 , an alarm 208 and a function panel 209 , and the fan 205 , the gas sensor 206 , the start switch 207 and the alarm 208 are all electrically connected to the function panel 209 .

[0033] Working principle: When the hydraulic door-opening ductless fume hood is used, first fold the bottom protective glass 1033 upwards to make it fit with the middle protective glass 1032, and then push the middle protective glass 1032 to flip upwards. At this time, the hydraulic support rod 302 extends to support the middle protective glass 1032, and then put the raw materials required for the experiment into the experimental box 102, and then press down the middle protective glass 1032. At this time, the hydraulic support rod 302 contracts to reset the middle protective glass 1032, and then flip the bottom protective glass 1033 downward to reset, and then turn on the start switch 207, the fan 205 is powered on and rotates, and the gas in the experimental box 102 is drawn upwards, so that negative pressure is formed in the experimental box 102, and then the experimental operation can be carried out. The harmful gas generated in the experiment flows upward and is filtered through the first filter 203 and the second filter 204 in turn, and the waste water generated in the experiment is discharged into the waste water bucket 107 through the plastic hose. The hydraulic door-opening ductless fume hood has an advanced design, a compact structure, and is easy to use. By providing a mounting seat 301 and a hydraulic support rod 302, the protective glass 103 can be lifted up and supported from bottom to top by lightly lifting the protective glass 103 to open the cabinet door. The protective glass 103 can be retracted and reset from top to bottom by lightly pressing the protective glass 103 to close the cabinet door. The operation is simple and labor-saving, and its application in ductless fume hoods of larger sizes has obvious advantages and is worthy of vigorous promotion.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A hydraulic door-opening ductless fume hood, characterized in that: include: A cabinet (100), the cabinet (100) comprising a base (101) and an experimental box (102) fixed on the top of the base (101), a protective glass (103) being provided on one side of the experimental box (102), and a surface wind speed sensor (104) being provided on the top of the protective glass (103); A gas purification device (200), the gas purification device (200) comprising a filter frame (201) fixed on the top of an experimental box (102) and a wiring frame (202) fixed on one side of the filter frame (201), a first filter (203) and a second filter (204) are respectively provided at the bottom and the top of the filter frame (201), and a fan (205) and a gas sensor (206) are respectively provided inside the filter frame (201); A door opening device (300), the door opening device (300) comprising a mounting seat (301) and a hydraulic support rod (302), the mounting seat (301) being respectively fixed to the left and right inner walls of the cabinet (100) and the left and right ends of the protective glass (103), and the two ends of the hydraulic support rod (302) being respectively movably connected to the two mounting seats (301) corresponding thereto.

2. The hydraulic door-opening ductless fume hood according to claim 1, characterized in that: The protective glass (103) comprises a top protective glass (1031), a middle protective glass (1032) and a bottom protective glass (1033) which are arranged from top to bottom and hinged in sequence through hinges (105); the top protective glass (1031) is fixedly connected to the cabinet body (100); and an operating port (106) is provided in the middle of the bottom protective glass (1033).

3. The hydraulic door-opening ductless fume hood according to claim 2 is characterized in that: There are four mounting seats (301) in total, wherein two mounting seats (301) are symmetrically fixed at the bottom ends of the left and right inner walls of the cabinet (100), and the other two mounting seats (301) are symmetrically fixed at the two ends of the inner wall of the middle protective glass (1032).

4. The hydraulic door-opening ductless fume hood according to claim 1, characterized in that: A waste water bucket (107) is provided in the base (101), and a water inlet at the top of the waste water bucket (107) is sealedly connected to a water outlet at the bottom of the experimental box (102) via a plastic hose.

5. The hydraulic door-opening ductless fume hood according to claim 1, characterized in that: A plurality of sockets (108) are provided on one side of the base (101), and universal wheels (109) are fixed at the four corners of the base (101).

6. The hydraulic door-opening ductless fume hood according to claim 1, characterized in that: The cross-sectional dimensions of the first filter (203), the second filter (204) and the filter frame (201) are the same, and both the first filter (203) and the second filter (204) are activated carbon filters.

7. The hydraulic door-opening ductless fume hood according to claim 1, characterized in that: The outer side walls of the wiring rack (202) are respectively provided with a start switch (207), an alarm (208) and a function panel (209); the fan (205), the gas sensor (206), the start switch (207) and the alarm (208) are all electrically connected to the function panel (209).

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