CN217739009U

CN217739009U - Simple dew point monitoring device

Info

Publication number: CN217739009U
Application number: CN202222003712.1U
Authority: CN
Inventors: 桥本真喜; 郭凯
Original assignee: Kawata Machinery Manufacturing Shanghai Co ltd
Current assignee: Kawata Machinery Manufacturing Shanghai Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-11-04
Anticipated expiration: 2032-08-01

Abstract

The utility model relates to a simple and easy dew point monitoring devices, including dehumidification unit, first manual ball valve, mechanical type flowmeter, dew point detector, the manual ball valve of second and fan, first manual ball valve, mechanical type flowmeter, dew point detector and the manual ball valve of second connect gradually, the entry of first manual ball valve be connected with the export of dehumidification unit, the manual ball valve's of second export be connected with the suction side of fan, the discharge side of fan be connected with the entry of dehumidification unit. Adopted the utility model discloses a simple and easy dew point monitoring devices distinguishes and differentiates through the difference that shows the colour, does not relate to signal acquisition and processing, simple structure, and the cost is lower. According to the technical scheme, the characteristic that the silica gel drying agent changes color after absorbing water is adopted, dew point monitoring is achieved or realized, and judgment is carried out on the change of the calibrated color through comparison.

Description

Simple dew point monitoring device

Technical Field

The utility model relates to a plastics shaping field especially relates to the desiccator field, specifically indicates a simple and easy dew point monitoring device.

Background

In the plastic molding process, a dryer is usually used to dry and dehumidify the resin molding material, and the lower the moisture content in the material is, the more beneficial the molding of the product is. Therefore, the key of the drying material is the dehumidifying capability of the dryer, one of the performance indexes for judging whether the dehumidifying function of the dryer is normal is the dew point value, and if the moisture content in the air for drying the material is less, the dew point value is lower. The instrument for detecting the dew point generally uses a dew point transmitter, can convert a signal received by a dew point sensor into other signals such as an electric signal and the like, and is connected to other equipment controllers to feed back current dew point parameters. Such dew point transmitters are relatively expensive and are not a good recommendation to customers who typically have low forming requirements, relatively thin product profits, or are relatively sensitive to the cost of purchasing dryers.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming of above-mentioned prior art, providing a satisfy simple and easy dew point monitoring device simple structure, with low costs, application scope is comparatively extensive.

In order to achieve the above object, the utility model discloses a simple and easy dew point monitoring devices as follows:

the simple dew point monitoring device is mainly characterized by comprising a dehumidifying unit, a first manual ball valve, a mechanical flowmeter, a dew point detector, a second manual ball valve and a fan, wherein the first manual ball valve, the mechanical flowmeter, the dew point detector and the second manual ball valve are sequentially connected, an inlet of the first manual ball valve is connected with an outlet of the dehumidifying unit, an outlet of the second manual ball valve is connected with a suction side of the fan, and a discharge side of the fan is connected with an inlet of the dehumidifying unit.

Preferably, the dew point detector is filled with an adsorbing material, and the adsorbing material is a silica gel desiccant.

Preferably, the device further comprises a drying storage unit and a heating unit, wherein an outlet of the dehumidifying unit is connected with the heating unit, and the heating unit is connected with an air inlet of the drying storage unit.

Preferably, the device further comprises a filter, one end of the filter is connected with the outlet of the drying storage unit, and the other end of the filter is connected with the suction side of the fan.

Adopted the utility model discloses a simple and easy dew point monitoring devices, through the characteristic that the silica gel drier adsorbed moisture back discolours, distinguish and differentiate the difference that shows the colour, reach or realize not involving signal acquisition and processing to dew point monitoring, simple structure, the cost is lower.

Drawings

Fig. 1 is a schematic structural view of the simple dew point monitoring device of the present invention.

Reference numerals:

1. dew point detector

2. Mechanical flowmeter

3. First hand-operated ball valve

4. Dry storage unit

5. Heating unit

6. Dehumidifying unit

7. Fan blower

8. Filter

9. Second hand-operated ball valve

Detailed Description

In order to more clearly describe the technical content of the present invention, the following further description is given with reference to specific embodiments.

The utility model discloses a this simple and easy dew point monitoring devices, including dehumidification unit 6, first manual ball valve 3, mechanical type flowmeter 2, dew point detector 1, the manual ball valve 9 of second and fan 7, first manual ball valve 3, mechanical type flowmeter 2, dew point detector 1 and the manual ball valve 9 of second connect gradually, the entry of first manual ball valve 3 be connected with the export of dehumidification unit 6, the manual ball valve 9 of second export be connected with the suction side of fan 7, the side of discharging of fan 7 be connected with the entry of dehumidification unit 6.

As a preferred embodiment of the present invention, the dew point detector 1 is filled with an adsorbing material, and the adsorbing material is a silica gel desiccant.

Preferably, the device further comprises a drying storage unit 4 and a heating unit 5, wherein the outlet of the dehumidifying unit 6 is connected with the heating unit 5, and the heating unit 5 is connected with the air inlet of the drying storage unit 4.

As a preferred embodiment of the present invention, the device further comprises a filter 8, one end of the filter 8 is connected to the outlet of the dry storage unit 4, and the other end of the filter 8 is connected to the suction side of the blower 7.

The utility model discloses an among the embodiment, provide a simple structure, simple and easy dew point monitoring devices. The method is used under the condition of low dew point requirement.

The device comprises a first manual ball valve 3, a mechanical flow meter 2 and a dew point detector 1. When the manual ball valve is applied to replacing the silica gel adsorption material in the dew point detector 1, the manual ball valve can prevent the communication between the internal gas and the external air, and has the functions of blocking and isolating. The mechanical flowmeter 2 is used for adjusting the flow rate of gas entering the dew point detector 1 to be 1L/min. The dew point detector 1 contains an adsorbing material silica gel drying agent, and the color of the silica gel drying agent is changed into pink after saturated moisture is adsorbed. The fan 7 circulates the inside air for feeding the heated dry air into the dry storage unit 4. The dehumidifying unit 6 adsorbs moisture in the circulating air. The heating unit 5 heats the circulated air for drying the material. The drying storage unit 4 stores and dries materials to be dried. The filter 8 filters dust in the circulating air.

The fan 7 is connected to the dehumidifying unit 6 in a spitting manner, the dehumidified air enters the heating pipe to heat the air to a required temperature and then enters the drying and storing unit 4, the storing unit contains undried materials, the heated and dehumidified air dries moisture in the materials, dust in the air is filtered by the filter 8 and then returns to the suction port of the fan 7 to achieve a circulating drying action.

In the dew point monitoring, a small part of air at the outlet of the dehumidification unit 6 enters a manual ball valve in a bypass mode, the manual ball valve is connected to a mechanical flow meter with a regulation function and enters a dew point detector 1, and the dew point detector 1 is connected to the manual ball valve and returns to the suction side of a fan 7 to form the circulating flow of the air.

When the dryer is running, the air at the outlet of the dehumidification unit 6 enters the manual ball valve through a pipeline, enters the dew point detector 1 after being subjected to flow regulation by the mechanical flowmeter, and finally returns to the suction side of the fan 7. The dew point detector 1 contains an adsorbent material whose colour changes gradually from pink when a certain amount of moisture is present in the air flowing through, and which displays a blue colour in normal operation (dew point guaranteed: -10 ℃ or less). The manual ball valve is used for opening and closing a dew point detection bypass and is used when the dew point detector 1 is replaced, and the flow meter is used for adjusting the allowable flow (1L/min) entering the dew point detector 1. The operator can confirm whether the color of the dew point detector 1 is normal blue or not by means of visual point inspection, otherwise the dryer may have other abnormalities.

The adsorption material is a silica gel desiccant, the silica gel desiccant indicates the moisture absorption state of silica gel by utilizing the color change of cobalt dioxide during water absorption and dehydration, the cobalt dioxide is blue in an anhydrous state, different colors are presented along with different water absorption degrees after the cobalt dioxide absorbs water, and the colors are sequentially changed into blue purple, purple red and pink from blue (anhydrous). If the silica gel desiccant is pink, it indicates that its degree of moisture absorption is saturated. The water content in the air can be judged by comparing the calibration colors.

For a specific implementation of this embodiment, reference may be made to the relevant description in the above embodiments, which is not described herein again.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

It should be noted that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, moreover, unless otherwise indicated,

by "plurality" is meant at least two.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Adopted the utility model discloses a simple and easy dew point monitoring devices distinguishes and differentiates through the difference that shows the colour, does not relate to signal acquisition and processing, simple structure, and the cost is lower. According to the technical scheme, the characteristic that the silica gel drying agent changes color after absorbing water is adopted, dew point monitoring is achieved or realized, and judgment is carried out on the change of the calibrated color through comparison.

In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims

1. The utility model provides a simple and easy dew point monitoring devices, its characterized in that, the device including dehumidification unit, first manual ball valve, mechanical type flowmeter, dew point detector, the manual ball valve of second and fan, first manual ball valve, mechanical type flowmeter, dew point detector and the manual ball valve of second connect gradually, the entry of first manual ball valve be connected with the export of dehumidification unit, the export of the manual ball valve of second be connected with the suction side of fan, the exhaust side of fan be connected with the entry of dehumidification unit.

2. The simple dew point monitoring device as claimed in claim 1, wherein the dew point detector is filled with an adsorbing material, and the adsorbing material is silica gel desiccant.

3. The simple dew point monitoring device as claimed in claim 1, further comprising a dry storage unit and a heating unit, wherein the outlet of the dehumidifying unit is connected to the heating unit, and the heating unit is connected to the air inlet of the dry storage unit.

4. The simple dew point monitoring device as claimed in claim 3, further comprising a filter, wherein one end of the filter is connected to the air outlet of the dry storage unit, and the other end of the filter is connected to the suction side of the blower.