Laboratory ventilation opening filter screen convenient to replace

Abstract

The utility model discloses a laboratory ventilation opening filter screen convenient to replace, which belongs to the technical field of laboratory ventilation and comprises a ventilation main pipe, a mounting groove is formed in the side surface in the ventilation main pipe, and a filter screen structure is mounted in the mounting groove. The filter screen structure comprises a forward thread formed in the side surface of the interior of the mounting groove and a mounting ring in threaded connection through the forward thread, the front face of the mounting ring is fixedly connected with a shifting block, the side surface of the mounting ring is provided with a reverse thread, and the back face of the mounting ring is fixedly connected with a connecting ring; the interior of the connecting ring is fixedly connected with a filter screen; according to the utility model, only the mounting ring needs to be reversely rotated to separate the mounting ring from the ventilation main pipe, and then the filter screen is taken out and replaced by a new filter screen, so that the operation procedures of workers are effectively reduced, the problem that the filter screen can be disassembled by using a specific tool later is avoided, and the convenience of replacing the filter screen is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of laboratory ventilation, specifically relates to a laboratory ventilation opening filter screen convenient to replace. BACKGROUND

[0002] Laboratory ventilation refers to the process that air is exchanged and circulated between indoor and outdoor through natural or mechanical ways, and in order to avoid indoor air from polluting the outside or outdoor air from polluting the indoor, filter screen is usually installed in the pipeline during indoor ventilation to filter the flowing air.

[0003] The existing ventilation opening filter screen is usually fixed by bolts, and although the installation is firm, the filter screen is easy to be blocked in places with a large amount of particulate impurities, and when the filter screen needs to be replaced or cleaned, special tools are required for bolt fixation, and the bolts need to be screwed for disassembly and installation, which results in low practicability. INVENTION CONTENTS

[0004] The utility model aims at providing a laboratory ventilation opening filter screen convenient to replace to solve the problems in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a laboratory ventilation opening filter screen convenient to replace, comprising a ventilation main pipe, a mounting groove is formed in the side surface of the inside of the ventilation main pipe, a filter screen structure is installed in the inside of the mounting groove, the filter screen structure comprises a forward thread formed in the side surface of the inside of the mounting groove and a mounting ring threadedly connected through the forward thread, a poking block is fixedly connected to the front surface of the mounting ring, a reverse thread is formed in the side surface of the mounting ring, a connecting ring is fixedly connected to the back surface of the mounting ring, a filter screen is fixedly connected to the inside of the connecting ring, and a rubber pad is fixedly connected to the back surface of the filter screen.

[0006] As a preferred embodiment, the reverse thread is matched with the forward thread, and the poking blocks are circularly arrayed on the front surface of the mounting ring.

[0007] As a preferred embodiment, the side surface of the inside of the mounting ring is annularly arrayed with a moving groove, the inner wall of the moving groove is upwardly and downwardly parallelly formed with a fixing groove, and a fixing structure is installed on the front surface of the connecting ring.

[0008] As a preferred embodiment, the fixing structure comprises a moving block fixedly arranged on the front surface of the connecting ring in an annular array, the side surface of the moving block is upwardly and downwardly parallelly formed with an auxiliary groove, and a spring sheet is fixedly connected to the inside of the auxiliary groove.

[0009] As a preferred embodiment, the moving block is matched with the moving groove, and the spring sheet is matched with the fixing groove.

[0010] As a preferred implementation form, the back of the ventilation main pipe is fixedly communicated with a ventilation auxiliary pipe, the inside of the ventilation auxiliary pipe is fixedly connected with a support frame, and the back of the support frame is fixedly connected with an exhaust fan.

[0011] As a preferred implementation form, the top of the inside of the ventilation auxiliary pipe is rotatably connected with a baffle, the baffle is located behind the exhaust fan, the bottom of the inside of the ventilation auxiliary pipe is fixedly connected with a limiting block, and the limiting block is located between the baffle and the exhaust fan.

[0012] As a preferred implementation form, the front of the ventilation main pipe and outside of the mounting groove are fixedly installed with an indicator lamp, and the lower side of the indicator lamp and the front of the ventilation main pipe are movably connected with a switch button.

[0013] Compared with the prior art, the ventilation device has the beneficial effects that:

[0014] When the filter screen is replaced, only the mounting ring needs to be reversely rotated, the mounting ring is separated from the ventilation main pipe, then the filter screen is taken out and replaced with a new filter screen, the operation process of the staff is effectively reduced, the problem that the filter screen can only be disassembled by using a specific tool is avoided, and the convenience of replacing the filter screen is effectively improved.

[0015] When the connecting ring is installed on the back of the mounting ring, the front moving block is inserted into the moving groove, the spring sheet installed on the side surface of the moving block is contracted due to friction because the caliber of the moving groove is small, when the moving block is completely inserted into the moving groove, the spring sheet is not subjected to the friction of the moving groove and expands in the inside of the fixing groove, so that the connecting ring is fixed, the connecting ring and the filter screen are prevented from falling off during the holding of the mounting ring, and the installation efficiency is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole three-dimensional front view of the structure of the utility model;

[0017] Figure 2 It is a ventilation main pipe component three-dimensional view of the structure of the utility model;

[0018] Figure 3 It is a ventilation auxiliary pipe component three-dimensional view of the structure of the utility model;

[0019] Figure 4 It is a mounting ring component three-dimensional view of the structure of the utility model;

[0020] Figure 5 It is a mounting ring component three-dimensional view of the structure of the utility model;

[0021] Figure 6 It is a connecting ring component three-dimensional view of the structure of the utility model;

[0022] Figure 7 The utility model discloses a structure Figure 6 Detail enlarged stereogram schematic view at a in the middle.

[0023] In the drawing: 1, main pipe of ventilation, 2, auxiliary pipe of ventilation, 3, installation groove, 4, moving groove, 5, fixed groove, 6, support frame, 7, exhaust fan, 8, baffle, 9, limiting block, 10, indicator light, 11, switch button, 31, positive thread, 32, installation ring, 33, poking block, 34, reverse thread, 35, connecting ring, 36, filter screen, 37, rubber pad, 51, moving block, 52, auxiliary groove, 53, spring piece. DETAILED DESCRIPTION

[0024] The utility model will be further described below in combination with examples.

[0025] The following examples are used to illustrate the utility model, but cannot be used to limit the protection scope of the utility model. The conditions in the examples can be further adjusted according to specific conditions, and simple improvement of the method of the utility model under the concept of the utility model belongs to the range required to be protected by the utility model.

[0026] Please refer to Figures 1-7 The utility model provides a kind of laboratory ventilation port filter screen of convenient replacement, including main pipe of ventilation 1, installation groove 3 is set in the side surface inside main pipe of ventilation 1, filter screen structure is installed in the inside of installation groove 3, filter screen structure includes the positive thread 31 being set in the side surface inside installation groove 3 and the installation ring 32 being connected by positive thread 31 screw thread, the front surface of installation ring 32 is fixedly connected with poking block 33, the side surface of installation ring 32 is set with reverse thread 34, the back of installation ring 32 is fixedly connected with connecting ring 35, connecting ring 35 is fixedly connected with filter screen 36 in the inside, the back of filter screen 36 is fixedly connected with rubber pad 37;

[0027] Reverse thread 34 is adapted to positive thread 31, poking block 33 is circular array distribution in the front surface of installation ring 32, rubber pad 37 can play certain protection function;First, connecting ring 35 for installing filter screen 36 is fixedly installed in the back of installation ring 32, then installation ring 32 is aligned with installation groove 3, and installation ring 32 is rotated by poking block 33, with the effect of reverse thread 34 and positive thread 31, until the rubber pad 37 in the back of installation ring 32 is completely contacted with the inside back of installation groove 3, that is, the installation of filter screen 36 can be completed, when filter screen 36 is replaced, only need to reverse rotate installation ring 32, so that installation ring 32 is separated from main pipe of ventilation 1, then filter screen 36 is taken out and replaced with new filter screen 36.

[0028] Specifically, as Figure 4 AndFigure 5 As shown, the side surface inside the mounting ring 32 is provided with a moving groove 4 in a ring array, the inner wall of the moving groove 4 is provided with a fixed groove 5 in parallel from top to bottom, and the front surface of the connecting ring 35 is provided with a fixed structure.

[0029] Specifically, as shown in the drawings, Figure 6 and Figure 7 The fixed structure includes a moving block 51 fixed on the front surface of the connecting ring 35 in a ring array, the side surface of the moving block 51 is provided with an auxiliary groove 52 in parallel from top to bottom, and the inside of the auxiliary groove 52 is fixedly connected with a spring sheet 53.

[0030] The moving block 51 is matched with the moving groove 4, and the spring sheet 53 is matched with the fixed groove 5; when the connecting ring 35 is installed on the back surface of the mounting ring 32, the moving block 51 on the front surface thereof will be inserted into the moving groove 4, and the spring sheet 53 installed on the side surface of the moving block 51 will be contracted due to the friction of the moving groove 4 with a smaller caliber, so that the spring sheet 53 will not be subjected to the friction of the moving groove 4 and expand in the inside of the fixed groove 5 when the moving block 51 is completely inserted into the moving groove 4, thereby fixing the connecting ring 35 and avoiding the falling of the connecting ring 35 and the filter screen 36 during the holding of the mounting ring 32, and reducing the installation efficiency.

[0031] Specifically, as shown in the drawings, Figure 3 The back surface of the ventilation main pipe 1 is fixedly connected with a ventilation auxiliary pipe 2, the inside of the ventilation auxiliary pipe 2 is fixedly connected with a support frame 6, and the back surface of the support frame 6 is fixedly connected with an exhaust fan 7.

[0032] Through the rotation of the exhaust fan 7, the indoor air is conveniently driven to be discharged to the outside through the ventilation main pipe 1 and the ventilation auxiliary pipe 2.

[0033] Specifically, as shown in the drawings, Figure 3 The inside of the ventilation auxiliary pipe 2 is rotatably connected with a baffle 8 at the top, the baffle 8 is located behind the exhaust fan 7, the inside of the ventilation auxiliary pipe 2 is fixedly connected with a limiting block 9 at the bottom, and the limiting block 9 is located between the baffle 8 and the exhaust fan 7.

[0034] The baffle 8 can only rotate rearward due to the limitation of the limiting block 9, so that when the external air enters the room, it will be blocked by the baffle 8.

[0035] Specifically, as shown in the drawings, Figure 1 The front surface of the ventilation main pipe 1 and outside the mounting groove 3 are fixedly installed with an indicating lamp 10, and the lower surface of the indicating lamp 10 and the front surface of the ventilation main pipe 1 are movably connected with a switch button 11.

[0036] The installation of the indicating lamp 10 can visually remind the workers through different colors, reminding the workers of the working state of the device.

[0037] The working principle and use flow of the utility model are as follows: the staff first fixes and installs the connecting ring 35 provided with the filter screen 36 on the back of the mounting ring 32, then aligns the mounting ring 32 with the mounting groove 3, rotates the mounting ring 32 through the poking block 33, and with the action of the reverse screw thread 34 and the normal screw thread 31, until the rubber pad 37 on the back of the mounting ring 32 is fully contacted with the inner back of the mounting groove 3, the installation of the filter screen 36 can be completed;

[0038] When the filter screen 36 is replaced, only the mounting ring 32 needs to be reversely rotated to separate the mounting ring 32 from the ventilation main pipe 1, then the filter screen 36 is taken out and a new filter screen 36 is replaced;

[0039] In the ventilation process, the rotation of the exhaust fan 7 drives the indoor air, after the filtration of the filter screen 36, the air is discharged to the outside through the ventilation main pipe 1 and the ventilation auxiliary pipe 2; the baffle 8 can only rotate to the back due to the limitation of the limiting block 9, so when the external air enters the room, it will be blocked by the baffle 8.

[0040] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A laboratory fume hood filter screen that facilitates replacement, comprising a fume main (1), characterized in that: The side surface of the ventilation main pipe (1) is provided with a mounting groove (3), the mounting groove (3) is internally provided with a filter screen structure, the filter screen structure comprises a forward thread (31) provided on the side surface of the mounting groove (3) and a mounting ring (32) threadedly connected through the forward thread (31), the front surface of the mounting ring (32) is fixedly connected with a poking block (33), the side surface of the mounting ring (32) is provided with a reverse thread (34), the back surface of the mounting ring (32) is fixedly connected with a connecting ring (35), the inside of the connecting ring (35) is fixedly connected with a filter screen (36), and the back surface of the filter screen (36) is fixedly connected with a rubber pad (37).

2. A replaceable laboratory fume hood filter screen according to claim 1, wherein: The reverse thread (34) is matched with the forward thread (31), and the poking block (33) is circularly arranged on the front surface of the mounting ring (32).

3. A replaceable laboratory fume hood filter screen according to claim 1, wherein: The side surface of the mounting ring (32) is annularly provided with a moving groove (4), the inner wall of the moving groove (4) is provided with a fixed groove (5) in parallel from top to bottom, and the front surface of the connecting ring (35) is provided with a fixed structure.

4. A replaceable laboratory fume hood filter screen according to claim 3, wherein: The fixed structure comprises a plurality of moving blocks (51) fixed on the front surface of the connecting ring (35) in an annular array, the side surface of the moving block (51) is provided with an auxiliary groove (52) in parallel from top to bottom, and the inside of the auxiliary groove (52) is fixedly connected with a spring sheet (53).

5. A replaceable laboratory fume hood filter screen according to claim 4, wherein: The moving block (51) is matched with the moving groove (4), and the spring sheet (53) is matched with the fixed groove (5).

6. A replaceable laboratory fume hood filter screen according to claim 1, wherein: The back surface of the ventilation main pipe (1) is fixedly connected with a ventilation branch pipe (2), the inside of the ventilation branch pipe (2) is fixedly connected with a support frame (6), and the back surface of the support frame (6) is fixedly connected with an exhaust fan (7).

7. A replaceable laboratory fume hood filter screen according to claim 6, wherein: The top of the inside of the ventilation branch pipe (2) is rotatably connected with a baffle (8), the baffle (8) is located behind the exhaust fan (7), the bottom of the inside of the ventilation branch pipe (2) is fixedly connected with a limiting block (9), and the limiting block (9) is located between the baffle (8) and the exhaust fan (7).

8. A replaceable laboratory fume hood filter screen according to claim 1, wherein: The front surface of the ventilation main pipe (1) and located outside the mounting groove (3) is fixedly provided with an indicating lamp (10), and the lower portion of the indicating lamp (10) and located on the front surface of the ventilation main pipe (1) is movably connected with a switch button (11).

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