CN219328812U

CN219328812U - Special surface wind speed measuring device for hot wire type fume chamber

Info

Publication number: CN219328812U
Application number: CN202320770336.0U
Authority: CN
Inventors: 高佳伟; 丁丽; 汤贇; 杨立勇
Original assignee: Xude Automatic Control System Shanghai Co ltd
Current assignee: Xude Automatic Control System Shanghai Co ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-07-11
Anticipated expiration: 2033-04-10

Abstract

The utility model discloses a special surface wind speed measuring device for a hot-wire type fume hood, which comprises a shell, wherein the side surface of the shell is U-shaped, a plurality of air inlets are formed in the top of the shell, a first clamping groove and a second clamping groove are respectively formed in the inner wall surfaces of two sides of the shell, a guide plate and a surface wind speed sensor are respectively inserted and installed in the first clamping groove and the second clamping groove in a plugging manner, fixing seats are fixedly connected to the outer wall of the top end and the outer wall of the bottom end of one side of the shell, threaded holes are formed in the fixing seats, a mounting plate is installed on the front side of the shell, a plurality of mounting holes are formed in the surface of the mounting plate, and air outlets are formed in the mounting plate. The utility model has reasonable structural design, is not easy to accumulate dust and other impurities, and can effectively prevent the air flow from directly flowing through the surface wind speed sensor to form turbulent flow, thereby greatly improving the measurement accuracy and the service life of the measuring device.

Description

Special surface wind speed measuring device for hot wire type fume chamber

Technical Field

The utility model belongs to the technical field of wind speed measurement, and particularly relates to a special surface wind speed measuring device for a hot-wire type ventilating cabinet.

Background

The main function of the fume hood is to inhibit harmful chemical gas generated in the fume hood from leaking, and discharge the harmful chemical gas out of a laboratory as soon as possible, so that the safety of laboratory staff is protected. The face wind speed is the average speed of the fume hood window and is a main technical parameter for measuring the performance of the fume hood. The measurement of the surface wind speed is generally carried out by means of a special surface wind speed sensor, by means of which the surface wind speed of the ventilation counter can be measured in real time and the measured value is sent to the controller.

There are some surface wind speed sensors on the market at present, for example, a surface wind speed sensor device based on a large-scale fume hood is disclosed on the China patent net, the publication number of which is CN207507954U, and although the surface wind speed sensor device can measure the surface wind speed of the fume hood, there are some defects and shortcomings to be improved: (1) The existing surface wind speed sensor is mainly arranged on the upright post or the side face of the fume chamber, and adopts a thermosensitive principle to measure the surface wind speed, and the fume chamber is positioned in a chemical laboratory environment for a long time, so that dust is easy to accumulate in the surface wind speed sensor, and cement is formed, so that the heat dissipation of a thermistor in the surface wind speed sensor is uneven, and the linear relation between a resistance value and the wind speed is influenced; (2) The existing surface wind speed sensor thermistor design layout is unreasonable, when the surface wind speed is measured, air flow can directly blow against the thermistor on the sensor surface, turbulence is easy to form, measurement accuracy is affected, and the air flow directly flows through the element to enable the element to be easy to age, so that service life is affected. Therefore, aiming at the problems, the special surface wind speed measuring device for the hot-wire type ventilating cabinet has important significance.

Disclosure of Invention

The utility model provides a special surface wind speed measuring device for a hot-wire type ventilating cabinet, which solves the problems.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to a special surface wind speed measuring device for a hot-wire type fume hood, which comprises a shell, wherein the side surface of the shell is U-shaped, a plurality of air inlets are formed in the top of the shell, a first clamping groove and a second clamping groove are respectively formed in the inner wall surfaces of two sides of the shell, a guide plate and a surface wind speed sensor are respectively inserted and installed in the first clamping groove and the second clamping groove, fixed seats are fixedly connected to the outer wall of the top end and the bottom end of one side of the shell, threaded holes are formed in the fixed seats, a mounting plate is installed on the front side of the shell, a plurality of mounting holes are formed in the surface of the mounting plate, and air outlets are formed in the mounting plate.

Further, the guide plate is of a square plate structure, a plurality of wire grooves are formed in the front end face of the guide plate, and a gap is reserved between the guide plate and the arc end of the shell.

Further, a wire clamping opening is formed in one side of the shell, is U-shaped and is located between the first clamping groove and the second clamping groove.

Further, the air outlet is communicated with the inner cavity of the shell and is positioned below the surface wind speed sensor.

Further, the number of the mounting holes is the same as that of the threaded holes, the apertures of the mounting holes are equal, and each mounting hole and the center of the corresponding threaded hole are positioned on the same straight line.

Compared with the prior art, the utility model has the following beneficial effects:

(1) When the surface wind speed measuring device is used, the surface wind speed sensor can be used for measuring the wind speed of the air flow flowing through so as to measure the required surface wind speed of the ventilating cabinet, and the air flow can be guided to the surface wind speed sensor by the guide plate and plays a role in keeping out wind, so that the air flow is prevented from being fast and directly guided to the surface wind speed sensor to accumulate dust and other impurities in the air;

(2) When the surface wind speed measuring device is used, an air channel can be formed through the mutual matching of the air inlet, the guide plate and the air outlet, and negative pressure is generated in the shell, so that air flow can stably flow through the surface wind speed sensor, laminar flow is facilitated, a control signal is conveniently and stably measured, turbulent flow can be effectively prevented through the guide plate, and the measuring precision and the service life of the measuring device are effectively improved.

Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a special surface wind speed measuring device for a hot-wire type ventilating cabinet;

FIG. 2 is a top view of the structure of a special surface wind speed measuring device for a hot-wire type ventilating cabinet;

FIG. 3 is a side view of the structure of a special surface wind speed measuring device for a hot-wire type fume hood of the utility model;

FIG. 4 is a schematic perspective view of the housing of the present utility model;

FIG. 5 is a front view of the structure of the housing of the present utility model;

fig. 6 is a front view of the structure of the mounting plate of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. a housing; 2. an air inlet; 3. a first clamping groove; 4. a second clamping groove; 5. a deflector; 6. a face wind speed sensor; 7. a fixing seat; 8. a threaded hole; 9. a mounting plate; 10. a mounting hole; 11. an air outlet; 12. a wire slot; 13. and a wire clamping port.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "opposite," "one end," "interior," "transverse," "end," "both ends," "two sides," "front," "one end face," "the other end face," and the like indicate orientations or positional relationships, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the components or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-6, the special surface wind speed measuring device for the hot-wire type fume hood of the utility model comprises a housing 1, wherein the side surface of the housing 1 is U-shaped, a plurality of air inlets 2 are formed in the top of the housing, a first clamping groove 3 and a second clamping groove 4 are respectively formed in the inner wall surfaces of two sides of the housing 1, a guide plate 5 and a surface wind speed sensor 6 are respectively inserted and installed in the first clamping groove 3 and the second clamping groove 4, a fixing seat 7 is fixedly connected with the outer wall of the top end and the outer wall of the bottom end of one side of the housing 1, threaded holes 8 are formed in the fixing seat 7, a mounting plate 9 is installed on the front side of the housing 1, a plurality of mounting holes 10 are formed in the surface of the mounting plate 9, an air outlet 11 is formed in the mounting plate 9, air flow can be led into the housing 1 through the air inlets 2, and air flow can be led out through the air outlets 11 under the action of negative pressure, and in the process, the air speed of the air flow flowing through the heat wire can be measured through the surface wind speed sensor 6 by utilizing the principle of a hot wire to measure the required surface wind speed of the fume hood.

Wherein, the guide plate 5 is square plate structure, a plurality of wire casing 12 has been seted up to its preceding terminal surface, and leave the space between the circular arc end of guide plate 5 and shell 1, after the air current gets into shell 1 through each air intake 2, utilize guide plate 5 can be with air current guide surface wind speed sensor 6 to play the effect of keeping out the wind, in order to avoid the air current fast, direct ground wind speed sensor 6 and the impurity such as dust in the accumulation air, the vortex has also been avoided simultaneously, thereby effectively improved measuring accuracy and the life of this measuring device, the data line that is connected on the face wind speed sensor 6 can pass and laminate in wire casing 12, can carry out spacing and fixed to the data line through wire casing 12, in order to prevent that it from taking place distortion and winding.

The wire clamping opening 13 is formed in one side of the shell 1, the wire clamping opening 13 is U-shaped and is located between the first clamping groove 3 and the second clamping groove 4, and the data wire can penetrate through the wire clamping opening 13 and extend to the outside of the shell 1 so as to be connected with a related controller.

Wherein, air outlet 11 is linked together with the inner chamber of shell 1 to be located the below of face wind speed sensor 6, after this measuring device installs on the fume chamber, air outlet 11 is located the top of fume chamber, and extends to the inside of fume chamber, can form the wind channel through the mutually supporting of air intake 2, guide plate 5 and air outlet 11 this moment, and make the inside of shell 1 produce negative pressure, thereby can make the air current flow through face wind speed sensor 6 steadily, be favorable to the laminar flow, in order to stabilize the measurement control signal.

The number of the mounting holes 10 is the same as that of the threaded holes 8, the diameters of the mounting holes are equal, each mounting hole 10 and the center of the corresponding threaded hole 8 are located on the same straight line, bolts can be inserted into each mounting hole 10, the tail ends of the bolts can be screwed into the corresponding threaded holes 8, accordingly, the mounting plates 9 can be fixedly mounted on the front side of the shell 1 in a bolt connection mode, and the mounting plates 9 can be removed from the shell 1 so as to overhaul and replace the deflector 5 and the surface wind speed sensor 6 in the shell 1.

The surface wind speed sensor 6 related in the utility model is in the prior art, the model is AFS100, the surface wind speed sensor 6 comprises a circuit board, a microprocessor module, a thermistor and other related elements are integrated on the circuit board, the data wires are electrically connected to the electronic elements, the surface wind speed sensor 6 can be directly purchased from the market, the surface wind speed sensor 6 can be completely realized by a person skilled in the art, and needless to say, the protection content of the utility model does not relate to the improvement of software and a method.

The working principle of the utility model is as follows:

when the utility model is used, firstly, the mounting plate 9 is fixedly arranged on the front side of the shell 1 through bolts, then, the mounting plate 9 is fixedly arranged on the top of the fume chamber, the air outlet 11 extends from the top of the fume chamber to the inside of the fume chamber, the guide plate 5 and the surface air speed sensor 6 are respectively inserted and arranged in the shell 1 through the first clamping groove 3 and the second clamping groove 4, when the measuring device is arranged on the fume chamber, an air channel can be formed through the mutual matching of the air inlet 2, the guide plate 5 and the air outlet 11, negative pressure is generated in the shell 1, at the moment, air flow in the fume chamber can be led into the shell 1 through each air inlet 2, and air flow is led out through the air outlet 11 under the action of the negative pressure, in the process, the air speed of the air flow can be measured through the surface air speed sensor 6 by utilizing the hot wire principle, after the air flow enters the shell 1, the air flow can be guided to the surface air speed sensor 6 by the guide plate 5 to play a role of wind shielding, so that impurities such as dust in air are accumulated by the air flow fast and direct ground air speed sensor 6, and turbulence is avoided, the measuring precision and the service life of the measuring device are effectively improved, a data wire connected to the surface air speed sensor 6 can pass through and be attached to the wire slot 12, the data wire can be limited and fixed through the wire slot 12 to prevent the data wire from twisting and winding, and the data wire can pass through the wire clamping opening 13 and extend to the outside of the shell 1 so as to connect the data wire with a related controller, and the whole surface air speed measuring work can be completed.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims

1. The utility model provides a special face wind speed measuring device of hot-wire type fume chamber, its characterized in that, includes the shell, the side of shell is the U font, and a plurality of air intake has been seted up at its top, just first draw-in groove and second draw-in groove have been seted up respectively to the both sides inner wall surface of shell, peg graft respectively in first draw-in groove and the second draw-in groove and install guide plate and face wind speed sensor, the equal fixedly connected with fixing base of one side top and bottom outer wall of shell, threaded hole has been seted up on the fixing base, the mounting panel is installed to the front side of shell, a plurality of mounting hole has been seted up on the surface of mounting panel, just the air outlet has been seted up on the mounting panel.

2. The special surface wind speed measuring device for the hot-wire type ventilating cabinet according to claim 1, wherein the guide plate is of a square plate structure, a plurality of wire slots are formed in the front end face of the guide plate, and a gap is reserved between the guide plate and the arc end of the shell.

3. The special surface wind speed measuring device for the hot-wire type ventilating cabinet according to claim 1, wherein a wire clamping opening is formed in one side of the shell, is U-shaped and is located between the first clamping groove and the second clamping groove.

4. The special surface wind speed measuring device for the hot-wire type ventilating cabinet, as set forth in claim 1, wherein the air outlet is communicated with the inner cavity of the outer shell and is located below the surface wind speed sensor.

5. The special surface wind speed measuring device for the hot-wire type ventilating cabinet according to claim 1, wherein the number of the mounting holes is the same as that of the threaded holes, the hole diameters of the mounting holes are equal, and each mounting hole and the center of the corresponding threaded hole are positioned on the same straight line.