CN210293965U - Tunnel type drying experimental equipment - Google Patents
Tunnel type drying experimental equipment Download PDFInfo
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- CN210293965U CN210293965U CN201920944651.4U CN201920944651U CN210293965U CN 210293965 U CN210293965 U CN 210293965U CN 201920944651 U CN201920944651 U CN 201920944651U CN 210293965 U CN210293965 U CN 210293965U
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Abstract
The utility model discloses tunnel type drying experimental equipment, which comprises a drying chamber and a weighing portal frame, wherein a material tray bracket and a material tray are arranged in the drying chamber; the bottom of the drying chamber is provided with a weighing hole; and a weighing sensor and an electric push rod are arranged below the drying chamber, the weighing sensor is arranged on an ejector rod of the electric push rod, and the electric push rod is fixed on the horizontal cross beam. The weighing sensor and the material tray are arranged independently and are not connected, when the system is used for weighing, the weighing sensor is lifted through the straight line of the electric push rod along the vertical direction, passes through the weighing hole, enters the drying chamber, jacks up the material tray, and weighs the material; after weighing is finished, the electric push rod returns, so that the material tray falls back to the material tray support. And the weighing portal frame is independently arranged under the weighing structure, and the weighing portal frame and the main frame of the equipment are independently fixed on the ground, so that the influence of the running vibration of the equipment on the weighing precision can be effectively eliminated.
Description
Technical Field
The utility model belongs to the technical field of dry experimental facilities, a dry experimental facilities of tunnel formula is related to.
Background
Drying characteristic data such as drying rate, critical moisture content and equilibrium moisture content of the material to be dried under given drying conditions are the most basic technical parameters in dimensioning or determining the capacity of the dryer. The tunnel type drying experimental device is an experimental device for measuring the drying characteristics of materials and researching the influence of drying process conditions on the drying characteristics of the materials in a laboratory. The method has the main functions of calculating the moisture content and the drying rate of the material under a specific drying condition, drawing a drying characteristic curve and the like by weighing the weight change of the material in the drying process based on a weighing method and a moisture content calculation formula after the drying experimental conditions are adjusted.
The weighing accuracy has a great influence on the analysis of the drying characteristics of the material. At present, the material tray size and the charge capacity of laboratory tunnel type drying equipment are less, if weigh the error on the large side, can cause drying characteristic data such as follow-up moisture content, drying rate to calculate the scheduling problem of makeing mistakes. This is particularly true when drying property tests are performed on less dense materials such as paper. In the past, partial tunnel type drying equipment is in a mode of manually taking out and weighing samples, and most of the drying equipment is upgraded to an automatic weighing type.
However, the existing automatic weighing tunnel type drying equipment has the following problems that the precision of a nominal weighing sensor is difficult to play a role, the precision of an automatic weighing system and the accuracy of subsequent data analysis are seriously influenced, and the analysis requirement of the drying characteristics of the materials with smaller density such as paper cannot be met: (1) the material tray and the weighing sensor are rigidly fastened together through the connecting rod, and errors of the weighing sensor are easily caused by rigid stress caused by touching the support when the material tray is taken and placed; (2) in the whole drying process (during weighing and non-weighing periods), the impact of the high-speed airflow also causes the weighing sensor to generate shaking and irregular additional stress through the connecting rod, thereby causing larger errors; (3) the weighing system is connected with the machine body, and the precision of the weighing system is influenced by the running vibration of the machine body.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that above-mentioned prior art exists, the utility model aims to provide a dry experimental facilities of tunnel formula, weighing sensor error is little, and measurement accuracy is high, can satisfy the dry characteristic analysis needs of high accuracy of material.
The utility model discloses a realize through following technical scheme:
a tunnel type drying experimental device comprises a drying chamber and a weighing portal frame positioned below the drying chamber, wherein a weighing structure is arranged in the drying chamber and comprises a material tray bracket and a material tray placed on the material tray bracket;
the bottom of the drying chamber is provided with a weighing hole, and the center of the weighing hole corresponds to the center of the tray bracket;
a weighing sensor and an electric push rod are arranged below the drying chamber, the weighing sensor is arranged on an ejector rod of the electric push rod, and the weighing sensor can extend into the weighing hole;
the weighing portal frame comprises a horizontal beam and a stand column connected with the horizontal beam, and the electric push rod is fixed on the horizontal beam.
Furthermore, the center of the bottom of the charging tray is connected with a sleeve, and the bottom of the sleeve is communicated with the weighing hole.
Furthermore, a circular ring check ring is fixed on the outer edge of the bottom of the sleeve, a central hole is formed in the circular ring check ring, and the diameter of the central hole is the same as that of the weighing hole.
Furthermore, the outer diameter of the circular ring retainer ring is 10-20 mm larger than that of the weighing hole.
Further, the circular ring retainer ring is made of a non-metal heat-insulating material.
Furthermore, a protective sleeve is fixed outside the weighing sensor and made of a heat-insulating non-metal material.
Furthermore, the diameter of the weighing hole is 2-3 mm larger than that of the protective sleeve.
Furthermore, the number of the stand columns is two, and supporting legs with adjustable heights are arranged at the bottom of each stand column.
Furthermore, the tunnel type drying experimental equipment further comprises a control cabinet, and the control cabinet is used for controlling the motion of the electric push rod.
Further, a drying chamber door is arranged on the side wall of the drying chamber, and a dry bulb thermometer and a wet bulb thermometer are installed in the drying chamber;
the air inlet of the drying chamber is connected with one end of an air inlet pipeline, an electric heater and a pore plate flowmeter are installed on the air inlet pipeline, the other end of the air inlet pipeline is connected with the air outlet of a fan, the air inlet of the fan is connected with an air inlet valve and an airflow circulating valve, and the airflow circulating valve is respectively connected with the air outlet of the drying chamber and an exhaust gas discharge valve through a three-way pipeline.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a tunnel type drying experimental facility, including drying chamber and weighing portal frame, be equipped with charging tray and charging tray support in the drying chamber, be equipped with electric putter and weighing sensor below the drying chamber, weighing sensor and charging tray independent setting no longer connect, when the system weighs, weighing sensor through the straight line along vertical direction of electric putter lift, pass the weighing hole, get into the drying chamber, jack-up charging tray, carry out the material quality and weigh, and also have small clearance when contacting between weighing sensor and charging tray; after weighing is finished, the electric push rod returns, so that the material tray falls back to the material tray support. Effectively eliminate material dish among the prior art and pass through the connecting rod rigidity fastening together with weighing sensor, very easily cause the problem of weighing sensor error owing to touch the support and lead to rigidity stress when getting the charging tray to guarantee this scheme weighing sensor when jack-up is weighed, the various error stresses of small clearance release between weighing sensor and charging tray. The weighing portal frame is independently arranged under the weighing structure, and the weighing portal frame and the main frame of the equipment are independently fixed on the ground, so that the influence of the running vibration of the equipment on the weighing precision can be effectively eliminated.
Further, set up the sleeve in charging tray bottom center, during weighing, when weighing sensor got into the sleeve jack-up charging tray and weighs, the telescopic spacing of accessible guaranteed that the top is accurate and the charging tray does not topple.
Furthermore, a circular ring check ring is additionally arranged below the sleeve, the weighing hole is shielded and sealed by the sleeve at the bottom of the material tray and the circular ring check ring, and the influence on the precision of the weighing sensor caused by the leakage of hot air flow of the drying chamber through the weighing hole is eliminated.
Furthermore, the circular ring check ring is made of a non-metal heat insulation material, so that heat is effectively reduced from being transmitted out through the weighing hole.
Further, set up the protective sheath in weighing sensor outside to reduce when weighing sensor goes deep into the drying chamber and weighs, the influence of temperature to weighing sensor precision.
Further, the diameter of the weighing hole is 2-3 mm larger than that of the protective sleeve, so that the weighing sensor provided with the protective sleeve in the scheme can enter the sleeve, and when the charging tray is lifted to weigh, a small movable gap in the horizontal direction exists between the weighing sensor and the charging tray, various error stresses can be released, and the weighing precision is guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partial enlarged view of the weighing structure of the present invention.
Wherein, 1 is a drying chamber; 2 is a weighing structure; 3 is a dry bulb thermometer; 4 is a wet bulb thermometer; 5 is a heater; 6 is air inlet temperature sensor; 7 is a pore plate flowmeter; 8 is a fan; 9 is an air inlet valve; 10 is an airflow circulating valve; 11 is an exhaust gas discharge valve; 12 is a drying chamber door; 13 is a material tray; 14 is a weighing portal frame; 15 are supporting feet; 16 is an electric push rod; 17 is a weighing sensor; 18 is a tray bracket; 19 is an air inlet pipeline; 20 is a protective sleeve; 21 is a return air pipeline; 22 is a tee pipeline; 23 is an equipment control cabinet; 24 is a main frame; 25 is a heat-insulating material; 26 is a circular ring retainer ring; 27 is a weighing orifice and 28 is a sleeve.
Detailed Description
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
The present invention will be described in further detail with reference to the accompanying drawings:
as shown in fig. 1 and 2, the tunnel-type drying experimental facility of the present invention comprises a drying chamber 1 and a weighing portal frame 14 located below the drying chamber 1, wherein a weighing structure 2 is arranged in the drying chamber 1, and the weighing structure 2 comprises a material tray support 18 and a material tray 13 placed on the material tray support 18; the bottom of the drying chamber 1 is provided with a weighing hole 27, and the center of the weighing hole 27 corresponds to the center of the tray support 18; a weighing sensor 17 and an electric push rod 16 are arranged below the drying chamber, the weighing sensor 17 is arranged on a top rod of the electric push rod 16, and the weighing sensor 17 can extend into the weighing hole 27.
A non-metallic heat-insulating protective sleeve 20 is fixed outside the weighing sensor 17 to reduce the influence of temperature on the precision of the weighing sensor 17 when the weighing sensor 17 goes deep into the drying chamber 1 for weighing. The weighing sensor may be a pressure sensor model DYHW-108.
The weighing portal frame 14 comprises a horizontal cross beam and two upright columns connected with the horizontal cross beam, electric push rods 16 are fixed on the horizontal cross beam, and supporting legs 15 with adjustable height are installed at the bottom of each upright column.
As shown in fig. 1, an air inlet of the drying chamber 1 is connected with an air inlet pipeline 19, the air inlet pipeline 19 is provided with an electric heater 5, an air inlet temperature sensor 6 and a pore plate flowmeter 7, the other end of the air inlet pipeline 19 is connected with an air outlet of a fan 8, the air inlet of the fan 8 is connected with an air inlet valve 9 and an airflow circulating valve 10, and the airflow circulating valve 10 is connected with an air outlet of the drying chamber 1 and an exhaust gas discharge valve 11 through a tee pipeline 22; the drying chamber 1 is fixed on the top of an equipment control cabinet 23, and the equipment control cabinet 23 and the air inlet pipeline 19 are supported and fixed on the ground through a main frame 24; the drying chamber 1 and the outer side of the heating pipe 5 are laid with heat insulation materials 25.
When the device is installed for the first time and needs to be adjusted subsequently, the height of the supporting legs 15 is adjusted, so that the cross beam above the weighing portal frame 14 is kept horizontal, and the electric push rod 16 and the weighing sensor 17 are kept horizontal, and the weighing precision is guaranteed.
The diameter of the weighing hole 27 is 2-3 mm larger than that of the protective sleeve 20, so that the weighing sensor 17 can stretch into the weighing hole 27.
Charging tray 13 bottom center is connected with a sleeve 28, and the diameter of sleeve 28 equals the diameter of weighing hole 27, and fixed ring retaining ring 26 is followed outward to the bottom of sleeve 28, and the ring retaining ring adopts the preparation of non-metallic heat insulating material, and the ring retaining ring is 10 ~ 20mm bigger than weighing hole 27, and when charging tray 13 normally placed on charging tray support 18, sleeve 28 and ring retaining ring 26's bottom can contact drying chamber 1 bottom, shelters from drying chamber 1 bottom weighing hole 27 completely.
The weighing portal frame 14 and the drying equipment main frame 24 are independently fixed on the ground, and the influence of the operation vibration of the equipment on the weighing precision is effectively eliminated.
The front surface of the drying chamber 1 is provided with a drying chamber door 12, and a dry bulb thermometer 3 and a wet bulb thermometer 4 are arranged in the drying chamber 1.
The model of the electric push rod is XTL100, and the control cabinet 23 outputs direct current voltage through a built-in electric push rod controller to control the electric push rod 16 to move up and down, stop and limit at the highest and the lowest positions. The dc voltage may be 24v, 48v, 36v or 12v, etc.
In the actual use process, the preparation stage is as follows: weighing tare weight, placing a material tray 13 on a material tray bracket 18 through a drying chamber bin gate 12, pushing a weighing sensor 17 by an electric push rod 16 to travel a fixed distance, penetrating a weighing hole 27 below a drying chamber 1, entering a sleeve 28 below the material tray 13, finally jacking the material tray 13 for weighing, recording the tare weight of the material tray 13, and ensuring the precision of the weighing system because the material tray 13 is not rigidly connected with the weighing system in a fastened mode any more and has a certain movable gap in contact with the weighing system, so that additional stress influencing the weighing precision cannot be caused when the material tray 13 is placed or jacked up for weighing each time; after weighing is finished, the electric push rod 16 exits the drying chamber 1, so that the material tray 13 falls back to the material tray bracket 18; the method comprises the steps of loading, taking out a material tray 13, evenly spreading the material on the material tray 13, opening a bin gate 12 of a drying chamber, placing the material tray 13 on a material tray support 18, driving a weighing sensor 17 to penetrate through a weighing hole 27 by an electric push rod 16, entering a sleeve 28, jacking the material tray 13 for weighing, enabling the weighing sensor 17 to exit from the drying chamber 1 after weighing is finished, enabling the material tray 13 to fall back on the material tray support 18, closing the bin gate 12 of the drying chamber, and drying.
And (3) drying: and starting a main power supply, sequentially starting the fan 8 and the electric heater 5, adding water to the wetting ball thermometer 4, and setting the temperature of hot air for drying. The environmental air enters the fan 8 for acceleration through the air inlet valve 9 and the air return pipeline 21, then enters the air inlet pipeline 19, the air speed and the air pressure passing through the air inlet pipeline are measured by the orifice plate flowmeter 7, the air flow reaches the electric heater 5, the air flow flows into the drying chamber 1 after being heated, the material in the material tray 13 is heated, the high-humidity air flow flows out of the drying chamber 1 after being subjected to damp-heat exchange with the material, one part of the air flow is discharged into the external environment through the waste gas discharge valve 11, and one part of the air flow flows back to the air return pipeline 21 through the air flow circulating valve 10 for recycling.
When the drying process needs to be weighed at regular time, the heater 5 and the fan 8 are sequentially closed, the electric push rod 16 extends out to penetrate through a weighing hole 27 below the drying chamber 1, enters a sleeve 28 below the charging tray 13 and jacks up the charging tray 13 for weighing, the time is 10s, the stroke is about 130mm, the wind speed of the drying chamber 1 is completely stopped during the period, and the weighing sensor 17 is protected by the weighing sensor 17 due to the fact that the protective sleeve 20 is arranged during weighing, so that the weighing sensor 17 cannot be influenced by the fact that the ambient temperature is increased and the weighing sensor contacts with the high-temperature charging tray 13; after weighing is finished, the electric push rod 16 completely exits the drying chamber 1 within 10 seconds, so that the charging tray 13 falls back to the charging tray bracket 18, meanwhile, the sleeve 28 and the annular retainer ring 26 below the charging tray 13 reach the inner wall surface of the drying chamber 1, and the weighing hole 27 below the drying chamber 1 is blocked, so that the sealing performance of the drying chamber is ensured, and the influence on the precision of the weighing sensor caused by the leakage of hot air flow of the drying chamber through an opening is effectively eliminated; the fan 8 and the heater 5 are turned on to continue drying. And after a period of time, when weighing is needed again, repeating the operation until the drying is completely finished.
During the drying process, the return air path and the wind speed and pressure can be adjusted by the exhaust gas discharge valve 11, the airflow circulation valve 10 and the air intake valve 9. And after drying is finished, closing the fan 8 and the heater 5, taking out the materials through the drying chamber bin gate 12, and finishing drying.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. 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. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The tunnel type drying experimental equipment is characterized by comprising a drying chamber (1) and a weighing portal frame (14) positioned below the drying chamber (1), wherein a weighing structure (2) is arranged in the drying chamber (1), and the weighing structure (2) comprises a material tray support (18) and a material tray (13) placed on the material tray support (18);
the bottom of the drying chamber (1) is provided with a weighing hole (27), and the center of the weighing hole (27) corresponds to the center of the tray bracket (18);
a weighing sensor (17) and an electric push rod (16) are arranged below the drying chamber (1), the weighing sensor (17) is arranged on a push rod of the electric push rod (16), and the weighing sensor (17) can extend into a weighing hole (27);
the weighing portal frame (14) comprises a horizontal beam and an upright post connected with the horizontal beam, and an electric push rod (16) is fixed on the horizontal beam.
2. The tunnel drying experimental facility of claim 1, wherein: the center of the bottom of the charging tray (13) is connected with a sleeve (28), and the bottom of the sleeve (28) is communicated with the weighing hole (27).
3. The tunnel drying experimental facility of claim 2, wherein: a circular ring retainer ring (26) is fixed on the outer edge of the bottom of the sleeve (28), a central hole is formed in the circular ring retainer ring (26), and the diameter of the central hole is the same as that of the weighing hole (27).
4. The tunnel drying experimental facility of claim 3, wherein: the outer diameter of the circular ring retainer ring (26) is 10-20 mm larger than that of the weighing hole (27).
5. The tunnel drying experimental facility of claim 3, wherein: the circular ring retainer ring (26) is made of a non-metal heat-insulating material.
6. The tunnel drying experimental facility of claim 1, wherein: a protective sleeve (20) is fixed outside the weighing sensor (17), and the protective sleeve (20) is made of a heat-insulating non-metal material.
7. The tunnel drying experimental facility of claim 6, wherein: the diameter of the weighing hole (27) is 2-3 mm larger than that of the protective sleeve (20).
8. The tunnel drying experimental facility of claim 1, wherein: the number of the upright columns is two, and the bottom of each upright column is provided with a supporting leg (15) with adjustable height.
9. The tunnel drying experimental facility of claim 1, wherein: the tunnel type drying experimental equipment further comprises a control cabinet (23), and the control cabinet (23) is used for controlling the movement of the electric push rod (16).
10. The tunnel drying experimental facility as claimed in any one of claims 1 to 9, wherein: a drying chamber door (12) is arranged on the side wall of the drying chamber (1), and a dry bulb thermometer (3) and a wet bulb thermometer (4) are arranged in the drying chamber (1);
an air inlet of the drying chamber (1) is connected with one end of an air inlet pipeline (19), an electric heater (5) and a pore plate flowmeter (7) are installed on the air inlet pipeline (19), the other end of the air inlet pipeline (19) is connected with an air outlet of a fan (8), an air inlet of the fan (8) is connected with an air inlet valve (9) and an air flow circulating valve (10), and the air flow circulating valve (10) is respectively connected with an air outlet and an exhaust gas discharge valve (11) of the drying chamber (1) through a three-way pipeline (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944651.4U CN210293965U (en) | 2019-06-21 | 2019-06-21 | Tunnel type drying experimental equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944651.4U CN210293965U (en) | 2019-06-21 | 2019-06-21 | Tunnel type drying experimental equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210293965U true CN210293965U (en) | 2020-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920944651.4U Active CN210293965U (en) | 2019-06-21 | 2019-06-21 | Tunnel type drying experimental equipment |
Country Status (1)
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|---|---|
| CN (1) | CN210293965U (en) |
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2019
- 2019-06-21 CN CN201920944651.4U patent/CN210293965U/en active Active
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