CN110306894B - Glass door guide rail mechanism and device for laboratory ventilation cabinet - Google Patents
Glass door guide rail mechanism and device for laboratory ventilation cabinet Download PDFInfo
- Publication number
- CN110306894B CN110306894B CN201910398955.XA CN201910398955A CN110306894B CN 110306894 B CN110306894 B CN 110306894B CN 201910398955 A CN201910398955 A CN 201910398955A CN 110306894 B CN110306894 B CN 110306894B
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- Prior art keywords
- guide rail
- groove
- mounting groove
- side wall
- seat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
- B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D15/00—Suspension arrangements for wings
- E05D15/06—Suspension arrangements for wings for wings sliding horizontally more or less in their own plane
- E05D15/0621—Details, e.g. suspension or supporting guides
- E05D15/066—Details, e.g. suspension or supporting guides for wings supported at the bottom
- E05D15/0678—Details, e.g. suspension or supporting guides for wings supported at the bottom on balls or floating rollers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Securing Of Glass Panes Or The Like (AREA)
- Support Devices For Sliding Doors (AREA)
Abstract
The invention relates to a glass door guide rail mechanism and a device of a laboratory ventilation cabinet, comprising: the guide rail body is provided with a sliding groove which is consistent with the length direction of the guide rail body in the length direction; the glass fixing device comprises a sliding block which is clamped in the sliding groove and is in sliding connection with the inner side wall of the sliding groove, and a fixing block which is fixedly arranged at one end of the sliding block, which is far away from the guide rail body; the sliding block comprises a plurality of balls which are arranged in parallel at intervals, the balls are uniformly distributed and correspondingly arranged on two side walls of the sliding block, one side wall of each ball is fixed on the sliding block, and the other side wall of each ball is in contact with the inner side wall of the sliding groove. According to the invention, the balls are additionally arranged between the inner side wall of the guide rail body and the sliding block, so that the contact surface between the sliding block and the guide rail body is reduced, the motion friction coefficient of the guide rail body is reduced, and the sliding block is prevented from being worn after sliding in the guide rail body for a long time.
Description
Technical Field
The invention relates to the technical field of laboratory equipment, in particular to a glass door guide rail mechanism and a glass door guide rail device for a laboratory ventilation cabinet.
Background
Fume hoods are an integral part of laboratory ventilation design. In order to ensure the physical health of the experimenters, experiments which only involve toxic and harmful substances, pungent smell, volatile gas and the like are all operated in a fume hood. The largest mission of the fume hood in a laboratory is to ensure the safety of experimental personnel, but most of the prior fume hood perspective windows are arranged in the middle of the fume hood in a sliding way, and a guide rail provides a moving track for the perspective window; in the prior art, after the perspective window slides on the guide rail after long-term working, abrasion is generated, and the gap between the guide rail and the perspective window after abrasion is increased, so that the perspective window is dislocated in the sliding process.
Disclosure of Invention
In order to achieve the above object, the technical solution of the present invention is to provide a glass door guide rail mechanism for a laboratory fume chamber, comprising:
the guide rail body is provided with a sliding groove which is consistent with the length direction of the guide rail body in the length direction;
the glass fixing device comprises a sliding block which is clamped in the sliding groove and is in sliding connection with the inner side wall of the sliding groove, and a fixing block which is fixedly arranged at one end of the sliding block, which is far away from the guide rail body;
the sliding block comprises a plurality of balls which are arranged in parallel at intervals, the balls are uniformly distributed and correspondingly arranged on two side walls of the sliding block, one side wall of each ball is fixed on the sliding block, and the other side wall of each ball is in contact with the inner side wall of the sliding groove.
In order to enable the balls to better slide in the guide rail body and reduce the motion friction coefficient of the guide rail body, the invention adopts the technical scheme that the side wall of the sliding groove is provided with a ball groove which is vertically arranged and is matched with the balls, and the section of the ball groove is semicircular.
In order to fix the glass on the glass fixing device, the technical scheme of the invention is that one side of the fixing block, which is far away from the sliding block, is provided with a glass clamping groove.
In one embodiment, in order to fix the glass door at a required height after the glass door is moved to a specified position, the invention adopts the technical scheme that a limiting device mounting groove is arranged in the middle of the side wall of one end, away from the fixed block, of the sliding block, and a limiting device is arranged in each limiting device mounting groove.
In order to ensure that a sliding block of a glass fixing device can be fixed on a guide rail body so as to ensure that a glass door can hover after reaching a specified position in the process of moving up and down, the invention adopts the technical scheme that the limiting device comprises a sliding block which is arranged in a limiting device mounting groove and is in sliding connection with the inner side wall of the limiting device mounting groove, the size of the sliding block is matched with the size of the limiting device mounting groove, a first spring is arranged at the bottom of the sliding block, a first spring fixing groove is arranged in the middle of the bottom of the limiting device mounting groove, one end of the first spring is fixed in the first spring fixing groove, the other end of the first spring is fixed on one end face, close to the bottom of the limiting device mounting groove, of the sliding block, the cross section of the sliding block is in a T shape, the sliding block comprises a sliding seat with the size matched with, the fixture block is kept away from the one end lateral wall of sliding seat is by being close to keeping away from the slope setting in the direction of sliding seat just is close to the width of sliding seat one side is greater than keeps away from the width of sliding seat one side, the notch department of stop device mounting groove be equipped with the size with the limiting plate of stop device mounting groove size adaptation, the limiting plate intermediate position be equipped with the through-hole of fixture block adaptation, the limiting plate cover is located fixture block outside and lateral wall correspond and are fixed in the notch inside wall of stop device mounting groove.
In order to enable the sliding block of the glass fixing device to be fixed on the guide rail body and ensure that the glass door can hover after reaching a specified position in the up-and-down moving process, the technical scheme of the invention is that a plurality of limiting grooves which are parallel and arranged at intervals and are matched with the clamping blocks are arranged on the inner side wall of the sliding groove in the guide rail body, and the plurality of limiting grooves are arranged at intervals along the length direction of the guide rail body.
In one embodiment, in order to fix the ball on the sliding block and reduce the abrasion of the ball to the inner side wall of the track body, the invention adopts the technical scheme that a plurality of first grooves are arranged at two sides of the side wall of one end of the sliding block, which is far away from the fixed block, a fixing device is arranged in each first groove, the fixing device comprises a fastening seat which is fixed in the first groove through a first fastening pin and is matched with the first groove in size, a first strip-shaped hole which is arranged in a penetrating way is arranged on the side wall of the fastening seat, fixing holes are correspondingly arranged on two side walls of the first groove at the same height, an upright post is arranged on the bottom surface of the fastening seat, a second spring is sleeved outside the upright post, a second spring fixing groove corresponding to the second spring is arranged on the inner wall of the bottom of the first groove, one end of the second spring is sleeved on the upright post, and the other end of, and a ball fixing groove is formed in one end face, far away from the stand column, of the fastening seat, the balls are fixed in the ball fixing groove, and the first fastening pins sequentially penetrate through the fixing holes and the corresponding first strip-shaped holes to fix the fastening seat in the first groove.
In one embodiment, in order to avoid impacting the glass door to the top of the fume hood by excessive force during the up-and-down movement, the invention adopts the technical scheme that a buffer device mounting groove is arranged on the bottom surface of the sliding block, a buffer device is arranged in the buffer device mounting groove, the buffer device comprises a buffer seat which is fixed in the buffer device mounting groove through a second fastening pin and is matched with the size of the buffer device mounting groove, a second strip-shaped hole which penetrates through the side wall of the buffer seat is arranged, fixing holes are correspondingly arranged on the two side walls at the same height of the buffer device mounting groove, a fastening column is arranged on the bottom surface of the buffer seat, a third spring is sleeved outside the fastening column, a third spring fixing groove corresponding to the third spring is arranged on the inner wall of the bottom of the buffer device mounting groove, one end of the third spring is sleeved on the fastening column, and the other end of the third, the utility model discloses a buffer device, including buffer base, buffer seat, fixing post, limiting ring, fixing seat, buffer base, fixing seat, fixing base, buffer base, fixing post, the buffer base is kept away from being equipped with the fixing base of fastening post, the external diameter of fixing base is less than the external diameter of buffer base, the fixing base is kept away from be equipped with the blotter mounting groove on one end of buffer base, be equipped with the blotter in the blotter mounting groove, the notch department of buffer device mounting groove be equipped with the spacing ring of fixing base size adaptation, be equipped with in the middle of the spacing ring with the through-hole of fixing base adaptation, the spacing ring cover is located fixing.
In one embodiment, in order to avoid that a large amount of dust is adsorbed on the inner wall of the guide rail body after the guide rail body works for a long time, thereby avoiding that the granular dust increases the abrasion on the inner part of the guide rail body in the moving process of the glass door, the technical scheme of the invention is that one or more brush installation grooves are arranged on the side wall of one end of the sliding block, which is far away from the fixed block, the brush installation grooves are internally provided with cleaning brushes, each cleaning brush comprises a supporting block, a brush, a shielding plate and a fourth spring, wherein the supporting block is clamped in the brush installation groove and is in sliding connection with the inner side wall of the brush installation groove, the brush is fixedly arranged at one end of the supporting block, which is far away from the brush installation groove, the shielding plates are symmetrically arranged at two ends of the brush, the, the supporting shoe is located including the card in the brush mounting groove and with brush mounting groove inside wall sliding connection's joint piece, fixed locating the joint piece is kept away from the connecting block of fourth spring one end, the size of joint piece with the size adaptation of brush mounting groove, the connecting block with the brush is connected, the lateral wall of joint piece evenly is equipped with a plurality of second recesses, each be equipped with buffer in the second recess.
The embodiment of the invention provides a glass door guide rail device of a laboratory ventilation cabinet, which comprises:
the glass door guide rail mechanism of the laboratory fume hood is characterized by comprising two glass door guide rail mechanisms which are symmetrically arranged and a glass door clamped between the two glass door guide rail mechanisms of the laboratory fume hood, wherein the glass door guide rail mechanism of the laboratory fume hood is the glass door guide rail mechanism of the laboratory fume hood as claimed in any one of claims.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of a glass door guide rail mechanism of a laboratory fume hood according to an embodiment of the present invention;
FIG. 2 is a top view of the glass door track mechanism of the laboratory fume hood shown in FIG. 1;
FIG. 3 is an enlarged schematic view taken at A in FIG. 1;
FIG. 4 is an enlarged view of the point B in FIG. 2;
FIG. 5 is a schematic diagram of a glass door track mechanism for a laboratory fume hood in accordance with another embodiment of the present invention;
FIG. 6 is an enlarged view of the point C in FIG. 5;
FIG. 7 is a top view of a laboratory fume hood glass door guide track mechanism provided in accordance with another embodiment of the present invention;
FIG. 8 is a schematic view of the sweeper brush shown in FIG. 7;
FIG. 9 is a side cross-sectional view of the sweeper brush shown in FIG. 8;
FIG. 10 is a schematic diagram of the overall configuration of a laboratory fume hood glass door guide track arrangement according to another embodiment of the present invention;
FIG. 11 is a schematic view of an alarm device in accordance with another embodiment of the present invention;
fig. 12 is a block diagram of an overvoltage protection circuit in an alarm device according to another embodiment of the present invention;
fig. 13 is a block diagram of a power amplifier circuit in the alarm device in the safety management system of the present invention.
In the figure: 1: a guide rail body; 2: a glass fixing device; 3: a ball bearing; 4: a fixing device; 5: a limiting device; 6: a buffer device; 8: cleaning with a brush; 9: a glass door; 1-1: a sliding groove; 2-1: a slider; 2-2: a fixed block; 1-11: a limiting groove; 1-12: a ball groove; 2-11: a limiting device mounting groove; 2-12: a first groove; 2-13: a buffer mounting groove; 2-14: a brush mounting groove; 2-21: a glass clamping groove; 2-111: a first spring fixing groove; 2-121: a second spring fixing groove; 2-131: a third spring fixing groove; 4-1: a fastening seat; 4-2: a column; 4-3: a second spring; 4-11: a first bar-shaped hole; 5-1: a slider; 5-2: a first spring; 5-3: a limiting plate; 5-11: a sliding seat; 5-12: a clamping block; 6-1: a buffer seat; 6-2: fastening the column; 6-3: a third spring; 6-4: a cushion pad; 6-5: a limiting ring; 6-11: a second bar-shaped hole; 7-1: a first fastening pin; 7-2: a second fastening pin; 8-1: a support block; 8-2: a brush; 8-3: a shielding plate; 8-4: a fourth spring; 8-11: a clamping block; 8-12: connecting blocks; 90: a pressure sensor.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 to 9, the present invention provides a glass door guide rail mechanism for a laboratory fume chamber, comprising:
the guide rail comprises a guide rail body 1, wherein a sliding groove 1-1 consistent with the length direction of the guide rail body is formed in the length direction of the guide rail body;
the glass fixing device 2 comprises a sliding block 2-1 which is clamped in the sliding groove 1-1 and is in sliding connection with the inner side wall of the sliding groove 1-1, and a fixing block 2-2 which is fixedly arranged at one end of the sliding block 2-1 far away from the guide rail body 1;
the sliding block comprises a plurality of balls 3 which are arranged in parallel at intervals, the balls 3 are uniformly distributed and correspondingly arranged on two side walls of the sliding block 2-1, one side wall of each ball 3 is fixed on the sliding block 2-1, and the other side wall of each ball is in contact with the inner side wall of the sliding groove 1-1.
The working principle and the beneficial effects of the invention are as follows:
according to the invention, the balls are additionally arranged on the two side walls of the sliding block which are in contact with the side walls of the sliding groove, when the sliding block moves up and down in the sliding groove, the balls on the sliding block slide on the inner side wall of the guide rail body, and the friction between the sliding block and the inner side wall of the guide rail body is reduced by reducing the contact surface between the sliding block and the guide rail body, so that the motion friction coefficient of the guide rail body is reduced, the sliding block is prevented from being worn after sliding for a long time in the guide rail body, the gap between the worn guide rail and the glass door is prevented from being increased, and the glass door is prevented from being dislocate.
In order to make the ball better slide in the guide rail body and reduce the motion friction coefficient of the guide rail body, the preferred embodiment of the invention is that, as shown in fig. 2, the side wall of the sliding groove 1-1 is provided with a ball groove 1-12 which is vertically arranged and is matched with the ball 3, and the cross section of the ball groove 1-12 is set to be semicircular.
In order to fix the glass on the glass fixing device, the preferred embodiment of the invention is that, as shown in fig. 2, the side of the fixing block 2-2 far away from the slide block 2-1 is provided with a glass clamping groove 2-21.
In one embodiment, in order to fix the glass door at a desired height after the glass door is moved to a designated position, in a preferred embodiment of the present invention, as shown in fig. 1 and 2, a limiting device mounting groove 2-11 is provided at a middle position of a side wall of one end of the sliding block 2-1, which is away from the fixed block 2-2, and a limiting device 5 is provided in each of the limiting device mounting grooves 2-11.
In order to fix the sliding block of the glass fixing device on the guide rail body and thus ensure that the glass door can hover after reaching a specified position during the up-and-down movement, a preferred embodiment of the invention is that, as shown in fig. 3, the limiting device 5 comprises a sliding block 5-1 which is arranged in the limiting device mounting groove 2-11 and is slidably connected with the inner side wall of the limiting device mounting groove 2-11, the size of the sliding block 5-1 is matched with the size of the limiting device mounting groove 2-11, a first spring 5-2 is arranged at the bottom of the sliding block 5-1, a first spring fixing groove 2-111 is arranged in the middle of the bottom of the limiting device mounting groove 2-11, one end of the first spring 5-2 is fixed in the first spring fixing groove 2-111, and the other end is fixed on one end surface of the sliding block 5-1 near the bottom of the limiting device mounting, the section of the sliding block 5-1 is designed to be T-shaped, the sliding block 5-1 comprises a sliding seat 5-11 with the size matched with the size of the limiting device mounting groove 2-11 and a clamping block 5-12 fixedly arranged on one side, far away from the first spring 5-2, of the sliding seat 5-11, the side wall of one end, far away from the sliding seat 5-11, of the clamping block 5-12 is obliquely arranged from the direction close to the sliding seat 5-11 and the width close to one side of the sliding seat 5-11 is larger than that far away from one side of the sliding seat 5-11, a limiting plate 5-3 with the size matched with the size of the limiting device mounting groove 2-11 is arranged at the notch of the limiting device mounting groove 2-11, and a through hole matched with the clamping block 5-12 is arranged in the middle of the limiting plate 5-3, the limiting plate 5-3 is sleeved outside the clamping block 5-12, and the outer side wall of the limiting plate is correspondingly fixed on the inner side wall of the notch of the limiting device mounting groove 2-11.
In order to fix the sliding block of the glass fixing device on the guide rail body and ensure that the glass door can hover after reaching a designated position in the process of moving up and down, the preferred embodiment of the invention is that, as shown in fig. 3, a plurality of limiting grooves 1-11 which are parallel and arranged at intervals and are matched with the clamping blocks 5-12 are arranged on the inner side wall of the sliding groove 1-1 in the guide rail body 1, and the plurality of limiting grooves 1-11 are arranged at intervals along the length direction of the guide rail body 1.
The working principle and the beneficial effects of the embodiment are as follows:
in this embodiment, the elasticity of the first spring is greater than the gravity of the glass door, a sliding seat which is slidably connected with the limiting device mounting groove is arranged in the limiting device mounting groove, so that the sliding seat can slide relative to the limiting device mounting groove and is not separated from the limiting device mounting groove, the first spring is arranged in the limiting device mounting groove and presses the sliding seat towards the top direction of the limiting device mounting groove, and the sliding seat slides along the top direction of the limiting device mounting groove without the action of other external forces. The side end of the fixture block is obliquely arranged from a direction close to the sliding seat to a direction far away from the sliding seat, the width of one side close to the sliding seat is larger than that of one side far away from the sliding seat, and a limiting groove matched with the fixture block and obliquely arranged on the inner side wall is arranged on the inner side wall of the guide rail body, so that in the upward movement process, when the fixture block moves to a position corresponding to the limiting groove, one end of the fixture block can be embedded into the limiting groove of the guide rail body; when an upward or downward external force acts, the clamping block can be taken out of the limiting groove.
When the glass door is pushed upwards and the sliding block of the glass fixing device is pushed upwards to a specified position (the clamping block moves to the position corresponding to the limiting groove), one end of the clamping block can be embedded into the limiting groove of the guide rail body, at the moment, the clamping block is contacted with the inner side wall of the limiting groove, so that the inner side wall of the limiting groove applies an acting force to the clamping block, because the included angle between the inner side wall of the limiting groove and the inner wall of the guide rail body is set to be an obtuse angle, the acting force applied to the sliding seat by the inner side wall of the limiting groove can be decomposed into two acting forces which are parallel and vertical to the pushing direction, the acting force vertical to the pushing direction pushes the clamping block to slide towards the bottom of the limiting device mounting groove, and when the clamping block enters the limiting groove, the sliding seat slides towards the notch of the limiting device mounting groove under the acting force of, thereby fixing the slide block of the glass fixing device on the guide rail body. On the contrary, because the fixture block side is by being close to keeping away from the slope of the direction of sliding seat sets up and be close to the width of sliding seat one side is greater than keeps away from the width of sliding seat one side, just guide rail body inner wall be equipped with the fixture block cooperation and the spacing groove that the inside wall slope set up, when the pulling glass door down, the lateral wall of fixture block bottom surface exerts an effort to the spacing groove bottom surface (decurrent external force and the gravity of glass door itself are greater than the elasticity of first spring), the spacing groove has a reaction force to the fixture block to extrude the fixture block, under the effort of the first spring of sliding seat bottom, make the fixture block to the stop device mounting groove bottom slides, and then makes the fixture block leave the spacing groove, thereby make the slider can move down under the effect of the sliding groove of guide rail body.
In one embodiment, in order to fix the ball on the sliding block and reduce the abrasion of the ball to the inner side wall of the track body, as shown in fig. 2 and 4, a plurality of first grooves 2-12 are provided at two side positions of the side wall of one end of the sliding block 2-1, which is far away from the fixed block 2-2, a fixing device 4 is provided in each first groove 2-12, the fixing device 4 includes a fastening seat 4-1 which is fixed in the first groove 2-12 by a first fastening pin 7-1 and is matched with the first groove 2-12 in size, a first strip-shaped hole 4-11 is provided in the side wall of the fastening seat 4-1, fixing holes are provided in two side walls of the same height of each first groove 2-12, and a column 4-2 is provided on the bottom surface of the fastening seat 4-1, a second spring 4-3 is sleeved outside the upright post 4-2, a second spring fixing groove 2-121 corresponding to the second spring 4-3 is formed in the inner wall of the bottom of the first groove 2-12, one end of the second spring 4-3 is sleeved on the upright post 4-2, the other end of the second spring 4-3 is fixed at the bottom of the second spring fixing groove 2-121, a ball fixing groove is formed in one end face, away from the upright post 4-2, of the fastening seat 4-1, the ball 3 is fixed in the ball fixing groove, and each first fastening pin 7-1 sequentially penetrates through the fixing hole and the corresponding first strip-shaped hole 4-11 to fix the fastening seat 4-1 in the first groove 2-12.
The working principle and the beneficial effects of the embodiment are as follows:
the two side surfaces of the sliding block are correspondingly provided with first grooves, the side walls of the first grooves are provided with fixing holes of first fastening pins, the first fastening pins sequentially penetrate through the fixing holes in the first grooves and first strip-shaped holes in the fastening seats, a certain distance is reserved between the two centers of the first strip-shaped holes, the first fastening pins are fixed in the fixing holes in the first grooves, and the first strip-shaped holes in the fastening seats enable the fastening seats to slide up and down on the fixed first fastening pins; when upwards or during the lapse slider, when the slider reciprocated in the sliding tray, the ball on the slider all slided on the inside wall of guide rail body, after long-time the use, the long-term slip of ball and guide rail body inside wall can cause the wearing and tearing of guide rail body inside wall, can slide at the first recess horizontal slip with ball fixed connection's fastening seat, fastening seat is equipped with the second spring bottom with first recess simultaneously, make the ball can remove to guide rail body inside wall under the effect of second spring, and can be under the effect of external force to the bottom motion of first recess, the bottom motion to first recess when the resistance was too big when reciprocating promptly, make the ball keep away from guide rail body bottom, thereby when avoiding the ball to reciprocate the in-process and meet great resistance, cause wearing and tearing to guide rail body inside wall.
In one embodiment, in order to avoid that the glass door is impacted against the surface of the ventilating cabinet by too hard force during the up-and-down movement, in a preferred embodiment of the present invention, as shown in fig. 5 and 6, a buffer device mounting groove 2-13 is formed on the bottom surface of the sliding block 2-1, a buffer device 6 is arranged in the buffer device mounting groove 2-13, the buffer device 6 comprises a buffer seat 6-1 which is fixed in the buffer device mounting groove 2-13 through a second fastening pin 7-2 and is matched with the size of the buffer device mounting groove 2-13, a second strip-shaped hole 6-11 is formed on the side wall of the buffer seat 6-1, fixing holes are correspondingly formed on two side walls of the buffer device mounting groove 2-13 at the same height, a fastening column 6-2 is arranged on the bottom surface of the buffer seat 6-1, a third spring 6-3 is sleeved outside the fastening column 6-2, a third spring fixing groove 2-131 corresponding to the third spring 6-3 is arranged on the inner wall of the bottom of the buffer device mounting groove 2-13, one end of the third spring 6-3 is sleeved on the fastening column 6-2, the other end of the third spring 6-3 is fixed at the bottom of the third spring fixing groove 2-131, a fixing seat is arranged on the buffer seat 6-1 far away from the fastening column 6-2, the outer diameter of the fixing seat is smaller than that of the buffer seat 6-1, a buffer pad mounting groove is arranged on one end face of the fixing seat far away from the buffer seat 6-1, a buffer pad 6-4 is arranged in the buffer pad mounting groove, and a limiting ring 6-5 matched with the fixing seat in size is arranged at the notch of the buffer device mounting groove 2-13, a through hole matched with the fixing seat is formed in the middle of the limiting ring 6-5, the limiting ring 6-5 is sleeved on the outer side of the fixing seat, the outer side wall of the limiting ring is correspondingly fixed on the inner side wall of the notch of the buffering device mounting groove 2-13, and the second fastening pin 7-2 sequentially penetrates through the fixing hole and the corresponding second strip-shaped hole 6-11 to fix the buffering seat 6-1 in the buffering device mounting groove 2-13.
The working principle and the beneficial effects of the embodiment are as follows:
the bottom surface of the sliding block is provided with a buffer device mounting groove, the side wall of the buffer device mounting groove is provided with a fixing hole of a second fastening pin, the second fastening pin sequentially penetrates through the fixing hole on the buffer device mounting groove and a second strip-shaped hole on the buffer seat, a certain distance is arranged between two centers of the second strip-shaped hole, the second fastening pin is fixed in the fixing hole on the buffer device mounting groove, and the second strip-shaped hole on the buffer seat enables the buffer seat to slide up and down on the fixed second fastening pin;
when the slide block moves downwards to the bottom surface of the guide rail body, the cushion pad on the bottom surface of the slide block is contacted with the bottom surface of the guide rail body, the bottom surface of the guide rail body has a reaction force on the cushion pad, the cushion pad is upwards extruded on the bottom surface of the guide rail body, and the impact force generated by collision is absorbed and buffered along with the deformation of the cushion pad. Meanwhile, under the action of the second strip-shaped hole, the buffer seat can move in the direction away from the bottom surface of the guide rail body and extrude a third spring, the third spring is stressed to deform, so that the buffer seat moves upwards under the action of the second fastening pin and the second strip-shaped hole, the third spring converts extrusion force into elastic potential energy, so that the third spring has reaction force on the buffer seat, the buffer seat is extruded downwards, the bottom surface of the guide rail body is extruded downwards by the collision force, the third spring does negative work, so that the extrusion force is converted into elastic potential energy which is smaller than the extrusion force (namely the reaction force of the third spring on the buffer seat is smaller than the extrusion force), the size of the collision force transmitted to the bottom surface of the guide rail body is reduced (therefore, the buffer mechanism is an energy-absorbing type buffer device), and the collision force is prevented from directly acting on the bottom surface of the guide rail body and is directly transmitted to the guide, the damage to the bottom surface of the guide rail body is caused, so that the damage to the bottom surface of the guide rail body is reduced through the third spring and the buffer pad.
In one embodiment, in order to avoid that a large amount of dust is adsorbed on the inner wall of the guide rail body after the guide rail body works for a long time, and thus, the abrasion of the granular dust on the inner part of the guide rail body is avoided to be increased in the moving process of the glass door, in the preferred embodiment of the present invention, as shown in fig. 7 to 9, one or more brush installation grooves 2-14 are formed in the side wall of one end of the sliding block 2-1, which is away from the fixed block 2-2, and a cleaning brush 8 is arranged in the brush installation groove 2-14, wherein the cleaning brush 8 comprises a supporting block 8-1, a brush 8-2, a shielding plate 8-3, a shielding plate and a shielding plate, which are clamped in the brush installation groove 2-14 and slidably connected with the inner side wall of the brush installation groove 2-14, and is fixedly arranged at one end of, And a fourth spring 8-4 disposed between the supporting block 8-1 and the bottom of the brush mounting groove 2-14, wherein one end of the fourth spring 8-4 is fixed to the bottom of the supporting block 8-1, and the other end is fixed to the bottom of the brush mounting groove 2-14, the supporting block 8-1 includes a clamping block 8-11 clamped in the brush mounting groove 2-14 and slidably connected to the inner side wall of the brush mounting groove 2-14, a connecting block 8-12 fixedly disposed at one end of the clamping block 8-11 far from the fourth spring 8-4, the size of the clamping block 8-11 is adapted to the size of the brush mounting groove 2-14, the connecting block 8-12 is connected to the brush 8-2, and a plurality of second grooves are uniformly formed on the outer side wall of the clamping block 8-11, a buffer device 6 is arranged in each second groove.
The working principle and the beneficial effects of the embodiment are as follows:
one or more cleaning brushes are additionally arranged on one side face of the contact between the sliding block and the inner side wall of the guide rail body, when the sliding block moves up and down in the sliding groove, the cleaning brushes on the sliding block clean the inner wall of the guide rail body, falling dust drops at the bottom of the guide rail body, when the dust in the guide rail body is more, the glass door can be moved to the upper side, the dust on the bottom surface of the guide rail body is unloaded through cleaning tools, the guide rail body is prevented from working for a long time, a large amount of dust can be adsorbed on the inner wall, and the abrasion of granular dust to the inside of the guide rail body is prevented from being increased in the moving process of the glass door.
Meanwhile, due to the fact that the plurality of limiting grooves are formed in the guide rail body, after the cleaning brush cleans the guide rail body for a long time, abrasion of the cleaning brush can be caused, and therefore the cleaning brush is not attached to the inner side wall of the guide rail body in the later period, the supporting block of the cleaning brush can slide in the brush mounting groove of the sliding block, meanwhile, the fourth spring is arranged between the cleaning brush and the sliding block, the supporting block can move towards the side wall of the guide rail body under the acting force of the spring, when the cleaning brush cleans the guide rail body, the acting force larger than the elastic force of the fourth spring is met, the supporting block extrudes the fourth spring and moves towards the bottom of the brush mounting groove, and therefore the cleaning brush is prevented from being damaged when the cleaning brush is damaged and leads to the cleaning brush and the guide rail body not attached, and the cleaning brush is attached to the guide rail body under the acting force.
In addition, be equipped with a plurality of buffer in the joint piece outside of supporting shoe and brush mounting groove inside wall contact, buffer's spring elasticity is less than the elasticity of fourth spring, buffer's setting has increased the joint piece at the gliding resistance of brush mounting groove, has avoided the cleaning brush to meet too big external force, makes the too much guide rail body of keeping away from of brush not contact with guide rail body inside wall to avoid under the effect of external force, the cleaning brush can not play the effect of clearance.
In one embodiment, to avoid the door from being untightened during operation of the fumehood, a preferred embodiment of the present invention is that, as shown in fig. 11, the glass door rail mechanism of the laboratory fumehood further comprises a pressure sensor 90 disposed on a side of the cushion 6-4 remote from the cushion seat, a processor 10-1 electrically connected to the pressure sensor 90, a memory 10-2 electrically connected to the processor 10-1, and an alarm device 10-3 electrically connected to the processor 10-1.
The working principle and the beneficial effects of the scheme are as follows:
the pressure sensor 90 arranged in the cushion pad 6-4 is used for monitoring the pressure value generated after the cushion pad 6-4 is extruded in real time, the monitored real-time pressure value is fed back to the processor 10-1, and the processor 10-1 is used for analyzing and comparing the received real-time pressure value with a preset pressure threshold value (the preset pressure threshold value is preset according to actual requirements or experimental results and can be searched in the prior art) stored in the memory 10-2 in advance; when the real-time pressure value is zero, the cushion pad 6-4 is not contacted with the table top of the fume hood; when the real-time pressure value is larger than the preset pressure threshold value, the cushion pad 6-4 is in full contact with the table top of the fume hood (namely the door of the fume hood is completely closed); when the real-time pressure value is larger than zero and smaller than the preset pressure threshold value, the cushion pad 6-4 is in contact with the table board of the fume hood (namely, the cabinet door of the fume hood is not completely closed), and at the moment, the processor 10-1 controls the alarm device 10-3 to work to give an alarm.
In one embodiment, as shown in fig. 12 and 13, the alarm device 10-3 includes an overvoltage protection circuit, a power amplification circuit and a warning light, wherein a waterproof layer is attached to an outer surface of the warning light;
the warning lamp is connected with the positive terminal of the overvoltage protection circuit, and the other end of the warning lamp is connected with the power amplification circuit;
the overvoltage protection circuit includes: a voltage input end Vi, a first PMOS transistor P1 with a source connected with the voltage input end Vi, and a second PMOS transistor P2 with a source connected with the source of the first PMOS transistor P1 in parallel, wherein a drain of the second PMOS transistor P2 is connected with a gate of the first PMOS transistor P1 in parallel, a gate of the second PMOS transistor P2 is connected with a first resistor R1, the other end of the first resistor R1 is connected with the voltage input end Vi in parallel, a common node of the first resistor R1 and a gate of the second PMOS transistor P2 is connected with a first capacitor C1, a common node of a drain of the second PMOS transistor P2 and a gate of the first PMOS transistor P1 is connected with a second resistor R2, the other end of the second resistor R2 is connected with an NMOS transistor P3, the other end of the second resistor 573r 5 is connected with a source of the NMOS transistor P3, a gate of the NMOS transistor P3 is connected with the other end of the first capacitor C1, the gate of the first capacitor C5928 and a common node P599 of the NMOS operational amplifier U599, the output end of the operational amplifier U1 is connected with a common node of the first capacitor C1 and the grid electrode of the NMOS tube P3, the output end of the operational amplifier U1 is connected with a third resistor R3 in parallel, the other end of the third resistor R3 is connected with a first power supply section of the operational amplifier U1 in parallel, the first input end of the operational amplifier U1 is connected with a fourth resistor R4, the second input end of the operational amplifier U1 is connected with a fifth resistor R5, the second input end of the operational amplifier U1 and the common node of the fifth resistor R5 are connected with a sixth resistor R6, the fifth resistor R5 is connected with the sixth resistor R6 in series, the common node of the fourth resistor R4 and the first input end of the operational amplifier U1 is connected with a voltage regulator tube Z1, the reference electrode of the voltage regulator tube Z1 is connected with the common node of the fourth resistor R4 and the first input end of the operational amplifier U1, and the cathode of the voltage regulator tube Z1 is connected with a seventh resistor R7, the anode of the voltage regulator tube Z1 is connected in parallel with the other end of the fourth resistor R4, the second power supply end of the operational amplifier U1, the other end of the sixth resistor R6 and the drain of the NMOS tube P3 and is connected to the ground GND; the overvoltage protection circuit further comprises an inductor L with an input end connected with the drain electrode of the first PMOS tube P1, and a second capacitor C2 with one end connected with the output end of the inductor L, the other end of the second capacitor C2 is connected with a reference ground GND, and a common node of the second capacitor C2 and the inductor L is connected with the power amplification circuit;
the power amplification circuit includes: the triode T1 and the triode T2 are connected in series, a third capacitor C3 is connected in series with the base of the triode T1, a sixth resistor R6 and a seventh resistor R7 are connected in series between the emitter of the triode T1 and the emitter of the triode T2, a fourth capacitor C4 is connected in series between the collector of the triode T1 and the collector of the triode T2, and a fifth capacitor C5 is connected in series with the base of the triode T2.
The working principle and the beneficial effects of the scheme are as follows:
a second capacitor C2 is set as an energy storage capacitor, and a voltage regulator tube Z1 is set as a three-terminal voltage regulator tube (specifically, a TL431 voltage regulator tube or a TL432 voltage regulator tube);
in the overvoltage protection circuit, when the input voltage of the first PMOS transistor P1 is overvoltage, the first PMOS transistor P1 can be turned off, the energy storage capacitor C2 can discharge because it stores electric energy, and the process of discharging the energy storage capacitor C2 can at least maintain the discharge voltage of the energy storage capacitor C2 higher than the input voltage for a period of time, so that the turn-off state of the first PMOS transistor P1 can last for a period of time, so that even if the input voltage of the first PMOS transistor P1 is overvoltage at the current moment and has no overvoltage at the next moment, the first PMOS transistor P1 will not be switched from the turn-off state to the turn-on state immediately, but will be switched on when the discharge voltage of the energy storage capacitor C2 is not overvoltage, thus avoiding the damage to the first PMOS transistor P1 caused by the instant impact when the first PMOS transistor P1 is suddenly turned off and immediately turned on in short-time, the overvoltage protection is not limited by time, especially for hundreds of short-time overvoltage, the advantages are more obvious. In addition, the discharge voltage of the energy storage capacitor C2 is used to control the switch of the first PMOS transistor P1, so that the output voltage of the first PMOS transistor P1 can be limited relatively accurately.
As shown in fig. 10, the present invention provides a glass door guide rail device for a laboratory fume chamber, comprising:
the glass door guide rail mechanisms of the laboratory ventilation cabinet are symmetrically arranged, and the glass door 9 is clamped between the glass door guide rail mechanisms of the laboratory ventilation cabinet.
The working principle and the beneficial effects of the invention are as follows:
according to the invention, the balls are additionally arranged on the two side walls of the sliding block which are in contact with the side walls of the sliding groove, when the sliding block moves up and down in the sliding groove, the balls on the sliding block slide on the inner side wall of the guide rail body, and the friction between the sliding block and the inner side wall of the guide rail body is reduced by reducing the contact surface between the sliding block and the guide rail body, so that the motion friction coefficient of the guide rail body is reduced, the sliding block is prevented from being worn after sliding for a long time in the guide rail body, the gap between the worn guide rail and the glass door is prevented from being increased, and the glass door is prevented from being dislocate.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (8)
1. The utility model provides a laboratory fume chamber glass door guide rail mechanism which characterized in that includes:
the guide rail comprises a guide rail body (1), wherein a sliding groove (1-1) consistent with the length direction of the guide rail body is formed in the length direction of the guide rail body;
the glass fixing device (2) comprises a sliding block (2-1) which is clamped in the sliding groove (1-1) and is in sliding connection with the inner side wall of the sliding groove (1-1), and a fixing block (2-2) which is fixedly arranged at one end, far away from the guide rail body (1), of the sliding block (2-1);
the sliding block (2-1) is provided with a plurality of balls (3) which are arranged in parallel at intervals, the balls (3) are uniformly distributed and correspondingly arranged on two side walls of the sliding block (2-1), one side wall of each ball (3) is fixed on the sliding block (2-1), and the other side wall of each ball (3) is in contact with the inner side wall of the sliding groove (1-1);
a plurality of first grooves (2-12) are formed in the two sides of the side wall of one end, far away from the fixed block (2-2), of the sliding block (2-1), a fixing device (4) is arranged in each first groove (2-12), the fixing device (4) comprises a fastening seat (4-1) which is fixed in the first groove (2-12) through a first fastening pin (7-1) and is matched with the first groove (2-12) in size, a first strip-shaped hole (4-11) is formed in the side wall of the fastening seat (4-1) in a penetrating mode, fixing holes are correspondingly formed in the two side walls of the first grooves (2-12) at the same height, an upright column (4-2) is arranged on the bottom surface of the fastening seat (4-1), and a second spring (4-3) is sleeved outside the upright column (4-2), a second spring fixing groove (2-121) corresponding to the second spring (4-3) is formed in the inner wall of the bottom of the first groove (2-12), one end of the second spring (4-3) is sleeved on the upright post (4-2), the other end of the second spring (4-3) is fixed to the bottom of the second spring fixing groove (2-121), a ball fixing groove is formed in one end face, away from the upright post (4-2), of the fastening seat (4-1), the ball (3) is fixed in the ball fixing groove, and each first fastening pin (7-1) sequentially penetrates through the fixing hole and the corresponding first strip-shaped hole (4-11) to fix the fastening seat (4-1) in the first groove (2-12);
the bottom surface of the sliding block (2-1) is provided with a buffer device mounting groove (2-13), a buffer device (6) is arranged in the buffer device mounting groove (2-13), the buffer device (6) comprises a buffer seat (6-1) which is fixed in the buffer device mounting groove (2-13) through a second fastening pin (7-2) and is matched with the buffer device mounting groove (2-13) in size, the side wall of the buffer seat (6-1) is provided with a second strip-shaped hole (6-11) which is arranged in a penetrating way, two side walls of the same height of the buffer device mounting groove (2-13) are correspondingly provided with fixing holes, the bottom surface of the buffer seat (6-1) is provided with a fastening column (6-2), a third spring (6-3) is sleeved outside the fastening column (6-2), a third spring fixing groove (2-131) corresponding to the third spring (6-3) is arranged on the inner wall of the bottom of the buffer device mounting groove (2-13), one end of the third spring (6-3) is sleeved on the fastening column (6-2), the other end of the third spring (6-3) is fixed at the bottom of the third spring fixing groove (2-131), a fixed seat is arranged on the buffer seat (6-1) far away from the fastening column (6-2), the outer diameter of the fixed seat is smaller than that of the buffer seat (6-1), a buffer cushion mounting groove is arranged on one end face of the fixed seat far away from the buffer seat (6-1), a buffer cushion (6-4) is arranged in the buffer cushion mounting groove, a limiting ring (6-5) matched with the fixed seat in size is arranged at the notch of the buffer device mounting groove (2-13), a through hole matched with the fixing seat is formed in the middle of the limiting ring (6-5), the limiting ring (6-5) is sleeved on the outer side of the fixing seat, the outer side wall of the limiting ring is correspondingly fixed on the inner side wall of a notch of the buffer device mounting groove (2-13), and the second fastening pin (7-2) sequentially penetrates through the fixing hole and a corresponding second strip-shaped hole (6-11) to fix the buffer seat (6-1) in the buffer device mounting groove (2-13);
the glass door guide rail mechanism of the laboratory fume hood further comprises a pressure sensor (90) arranged on one side of a cushion pad (6-4) far away from the cushion seat, a processor (10-1) electrically connected with the pressure sensor (90), a memory (10-2) electrically connected with the processor (10-1), and an alarm device (10-3) electrically connected with the processor (10-1);
the alarm device (10-3) comprises an overvoltage protection circuit, a power amplification circuit and a warning lamp, wherein a waterproof layer is attached to the outer surface of the warning lamp;
the warning lamp is connected with the positive terminal of the overvoltage protection circuit, and the other end of the warning lamp is connected with the power amplification circuit;
the overvoltage protection circuit includes: a voltage input end Vi, a first PMOS transistor P1 with a source connected with the voltage input end Vi, and a second PMOS transistor P2 with a source connected with the source of the first PMOS transistor P1 in parallel, wherein a drain of the second PMOS transistor P2 is connected with a gate of the first PMOS transistor P1 in parallel, a gate of the second PMOS transistor P2 is connected with a first resistor R1, the other end of the first resistor R1 is connected with the voltage input end Vi in parallel, a common node of the first resistor R1 and a gate of the second PMOS transistor P2 is connected with a first capacitor C1, a common node of a drain of the second PMOS transistor P2 and a gate of the first PMOS transistor P1 is connected with a second resistor R2, the other end of the second resistor R2 is connected with an NMOS transistor P3, the other end of the second resistor 573r 5 is connected with a source of the NMOS transistor P3, a gate of the NMOS transistor P3 is connected with the other end of the first capacitor C1, the gate of the first capacitor C5928 and a common node P599 of the NMOS operational amplifier U599, the output end of the operational amplifier U1 is connected with a common node of the first capacitor C1 and the grid electrode of the NMOS tube P3, the output end of the operational amplifier U1 is connected with a third resistor R3 in parallel, the other end of the third resistor R3 is connected with a first power supply section of the operational amplifier U1 in parallel, the first input end of the operational amplifier U1 is connected with a fourth resistor R4, the second input end of the operational amplifier U1 is connected with a fifth resistor R5, the second input end of the operational amplifier U1 and the common node of the fifth resistor R5 are connected with a sixth resistor R6, the fifth resistor R5 is connected with the sixth resistor R6 in series, the common node of the fourth resistor R4 and the first input end of the operational amplifier U1 is connected with a voltage regulator tube Z1, the reference electrode of the voltage regulator tube Z1 is connected with the common node of the fourth resistor R4 and the first input end of the operational amplifier U1, and the cathode of the voltage regulator tube Z1 is connected with a seventh resistor R7, the anode of the voltage regulator tube Z1 is connected in parallel with the other end of the fourth resistor R4, the second power supply end of the operational amplifier U1, the other end of the sixth resistor R6 and the drain of the NMOS tube P3 and is connected to the ground GND; the overvoltage protection circuit further comprises an inductor L with an input end connected with the drain electrode of the first PMOS tube P1, and a second capacitor C2 with one end connected with the output end of the inductor L, the other end of the second capacitor C2 is connected with a reference ground GND, and a common node of the second capacitor C2 and the inductor L is connected with the power amplification circuit;
the power amplification circuit includes: the triode T1 and the triode T2 are connected in series, a third capacitor C3 is connected in series with the base of the triode T1, a sixth resistor R6 and a seventh resistor R7 are connected in series between the emitter of the triode T1 and the emitter of the triode T2, a fourth capacitor C4 is connected in series between the collector of the triode T1 and the collector of the triode T2, and a fifth capacitor C5 is connected in series with the base of the triode T2.
2. The glass door guide rail mechanism of the laboratory fume hood according to claim 1, characterized in that the side wall of the sliding groove (1-1) is provided with a ball groove (1-12) which is vertically arranged and is matched with the ball (3), and the cross section of the ball groove (1-12) is set to be semicircular.
3. The glass door guide rail mechanism of the laboratory ventilation cabinet according to claim 1, wherein a limiting device mounting groove (2-11) is formed in the middle of the side wall of one end, far away from the fixed block (2-2), of the sliding block (2-1), and a limiting device (5) is arranged in each limiting device mounting groove (2-11).
4. The glass door guide rail mechanism of the laboratory fume hood according to claim 3, wherein the limiting device (5) comprises a sliding block (5-1) which is arranged in the limiting device mounting groove (2-11) and is slidably connected with the inner side wall of the limiting device mounting groove (2-11), the size of the sliding block (5-1) is matched with the size of the limiting device mounting groove (2-11), a first spring (5-2) is arranged at the bottom of the sliding block (5-1), a first spring fixing groove (2-111) is arranged in the middle of the bottom of the limiting device mounting groove (2-11), one end of the first spring (5-2) is fixed in the first spring fixing groove (2-111), the other end of the first spring is fixed on one end face of the sliding block (5-1) close to the bottom of the limiting device mounting groove (2-11), the cross section of the sliding block (5-1) is arranged to be T-shaped, the sliding block (5-1) comprises a sliding seat (5-11) with the size matched with the size of the limiting device mounting groove (2-11) and a clamping block (5-12) fixedly arranged on one side, far away from the first spring (5-2), of the sliding seat (5-11), the side wall of one end, far away from the sliding seat (5-11), of the clamping block (5-12 is obliquely arranged in the direction, far away from the sliding seat (5-11), of the side wall of one end, far away from the sliding seat (5-11) and close to the sliding seat (5-11), is larger than the width, far away from one side of the sliding seat (5-11), a limiting plate (5-3) with the size matched with the size of the limiting device mounting groove (2-11) is arranged at the notch of the limiting, the limiting plate (5-3) is provided with a through hole matched with the clamping block (5-12) in the middle, the limiting plate (5-3) is sleeved on the outer side of the clamping block (5-12), and the outer side wall of the limiting plate is correspondingly fixed on the inner side wall of the notch of the limiting device mounting groove (2-11).
5. The glass door guide rail mechanism of the laboratory fume hood according to claim 4, wherein a plurality of limiting grooves (1-11) which are parallel and spaced and are matched with the clamping blocks (5-12) are arranged on the inner side wall of the sliding groove (1-1) in the guide rail body (1), and the plurality of limiting grooves (1-11) are spaced along the length direction of the guide rail body (1).
6. The glass door guide rail mechanism of the laboratory ventilation cabinet according to claim 1, wherein one or more brush installation grooves (2-14) are formed in the side wall of one end of the sliding block (2-1) far away from the fixed block (2-2), a cleaning brush (8) is arranged in the brush installation groove (2-14), the cleaning brush (8) comprises a supporting block (8-1) clamped in the brush installation groove (2-14) and slidably connected with the inner side wall of the brush installation groove (2-14), a brush (8-2) fixedly arranged at one end of the supporting block (8-1) far away from the brush installation groove (2-14), shielding plates (8-3) symmetrically arranged at the two ends of the brush (8-2), and a fourth spring (8-8) arranged between the supporting block (8-1) and the bottom of the brush installation groove (2-14) -4), one end of the fourth spring (8-4) is fixed at the bottom of the supporting block (8-1), the other end of the fourth spring is fixed at the bottom of the brush mounting groove (2-14), the supporting block (8-1) comprises a clamping block (8-11) which is clamped in the brush mounting groove (2-14) and is in sliding connection with the inner side wall of the brush mounting groove (2-14), and a connecting block (8-12) which is fixedly arranged at one end, far away from the fourth spring (8-4), of the clamping block (8-11), the size of the clamping block (8-11) is matched with that of the brush mounting groove (2-14), the connecting block (8-12) is connected with the brush (8-2), and a plurality of second grooves are uniformly arranged on the outer side wall of the clamping block (8-11), and a buffer device (6) is arranged in each second groove.
7. The glass door guide rail mechanism of the laboratory ventilation cabinet according to claim 1, wherein one side of the fixed block (2-2) far away from the sliding block (2-1) is provided with a glass clamping groove (2-21).
8. A glass door guide rail device of a laboratory fume hood, which is characterized by comprising two glass door guide rail mechanisms of the laboratory fume hood, which are symmetrically arranged, and a glass door (9) clamped between the two glass door guide rail mechanisms of the laboratory fume hood, wherein the glass door guide rail mechanism of the laboratory fume hood is the glass door guide rail mechanism of the laboratory fume hood as claimed in any one of claims 1 to 7.
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| CN201910398955.XA CN110306894B (en) | 2019-05-14 | 2019-05-14 | Glass door guide rail mechanism and device for laboratory ventilation cabinet |
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| CN201910398955.XA CN110306894B (en) | 2019-05-14 | 2019-05-14 | Glass door guide rail mechanism and device for laboratory ventilation cabinet |
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| CN110306894B true CN110306894B (en) | 2021-01-01 |
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| CN106335077A (en) * | 2016-09-23 | 2017-01-18 | 东莞市联洲知识产权运营管理有限公司 | Guide device on robot lifting shaft |
| CN207533654U (en) * | 2017-11-07 | 2018-06-26 | 苏州市凯利勋实验室设备有限公司 | A kind of vent cabinet with automatic sensing door |
| CN108086840A (en) * | 2017-12-27 | 2018-05-29 | 余兆生 | A kind of anti-shake clamping guiding device of sliding door |
| CN108915511A (en) * | 2018-08-03 | 2018-11-30 | 梅玲玲 | A kind of doors and windows sealing structure |
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| CN110306894A (en) | 2019-10-08 |
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