A calibration device for a cement fineness negative pressure sieve analyzer

Abstract

The utility model discloses a kind of cement fineness negative pressure sieve analysis appearance's calibrating device, it is related to cement detection equipment technical field, including connecting seat, installation in the sieve seat of negative pressure sieve analysis appearance, two first annular grooves, located the two ends of the sieve seat clamping surface peripheral side of connecting seat, second annular groove, between two first annular grooves, negative pressure appearance, airtightness is connected in the connecting seat, two sealing rings, clamped in the first annular groove, two the airtightness of annular space formed by sealing ring, sieve seat side wall, air pressure sensor, its detection head is located in the annular space, for detecting the airtightness of annular space. By setting sealing ring on connecting seat, and annular space is formed between two sealing rings, the airtightness between sieve seat and connecting seat can be detected when negative pressure sieve analysis appearance is calibrated, reduce the misalignment of calibration result due to poor sealing, improve the accuracy of calibration result.

Description

Technical Field

[0001] This utility model relates to the technical field of cement testing equipment, specifically a calibration device for a cement fineness negative pressure sieve analyzer. Background Technology

[0002] The cement fineness negative pressure sieve analyzer (referred to as the negative pressure sieve analyzer in some parts of this article) is widely used to determine the fineness of cement powder, and its test results directly affect the quality control of cement products. Therefore, the accuracy of the negative pressure sieve analyzer itself is particularly important, and it needs to be calibrated regularly to ensure that its negative pressure measurement is accurate and reliable.

[0003] Existing negative pressure sieve analyzers typically create negative pressure in a closed space by connecting a negative pressure device and perform testing based on the pressure display value on the device itself. However, due to possible minor air leaks between the sieve holder and the calibration device, the negative pressure data can be unstable or have significant deviations, affecting the accuracy of the calibration results. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a calibration device for a cement fineness negative pressure sieve analyzer.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A calibration device for a cement fineness negative pressure sieve analyzer includes: The connecting seat is installed on the sieve seat of the negative pressure sieve analyzer; Two first annular grooves are located at both ends of the circumference of the contact surface between the connecting seat and the screen seat. The second annular groove is located between the two first annular grooves; The negative pressure gauge is airtightly connected to the aforementioned connector. Two sealing rings are engaged in the first annular groove, and the two sealing rings, together with the second annular groove and the side wall of the screen seat, form an annular space. The barometric pressure sensor, with its detection head located within the aforementioned annular space, is used to detect the airtightness of the annular space.

[0006] Preferably, the width of the annular space is 3mm-10mm and the depth is 3mm-5mm.

[0007] Preferably, the aforementioned negative pressure device is a negative pressure sensor or a digital pressure gauge.

[0008] Preferably, the air inlet end of the negative pressure device is provided with a connecting pipe, and the connecting seat is connected to the negative pressure device through the connecting pipe.

[0009] Preferably, the aforementioned pressure sensor is located on top of the connector.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting a sealing ring on the connecting seat and forming an annular space between the two sealing rings, the airtightness between the sieve seat and the connecting seat can be detected during the calibration of the negative pressure sieve analyzer, reducing the inaccuracy of calibration results due to poor sealing and improving the accuracy of calibration results.

[0011] 2. By placing the main body of the pressure sensor on the outside of the connector, it is convenient to visually judge the airtightness of the annular space when calibrating the negative pressure sieve analyzer, thereby timely judging the airtightness of the sealing ring and improving the accuracy of calibration. Attached Figure Description

[0012] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the calibration device for the cement fineness negative pressure sieve analyzer. Figure 2 for Figure 1 A schematic diagram of the connecting seat and one side of the sealing ring; Figure 3 for Figure 2 A diagram illustrating the removal of the sealing ring.

[0013] Explanation of annotations in the image: 11. Connecting seat; 111. First annular groove; 112. Second annular groove; 12. Negative pressure gauge; 121. Connecting pipe; 21. Sealing ring. Detailed Implementation

[0014] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model. Example

[0015] like Figures 1-3 As shown, a calibration device for a cement fineness negative pressure sieve analyzer includes a connecting seat 11, a negative pressure gauge 12, two sealing rings 21, and a pressure sensor. The connecting seat 11 is installed on the sieve base of the negative pressure sieve analyzer, and the negative pressure gauge 12 is airtightly connected to the connecting seat 11. The negative pressure gauge 12 is a negative pressure sensor or a digital pressure gauge.

[0016] In one embodiment, such as Figures 2-3As shown, the connecting seat 11 has two first annular grooves 111 and one second annular groove 112. The two first annular grooves 111 are located at both ends of the circumference of the connecting seat 11's contact surface with the screen seat. The second annular groove 112 is located between the two first annular grooves 111. Two sealing rings 21 are engaged with the first annular grooves 111. The two sealing rings 21, the second annular grooves 112, and the side wall of the screen seat form an annular space. The detection head of the air pressure sensor is located within the annular space and is used to detect the airtightness of the annular space. The annular space is formed by the two sealing rings 21, the second annular grooves 112, and the side wall of the screen seat. In principle, the annular space is a sealed space. That is, when the negative pressure sieve is calibrated by the calibration device of the negative pressure sieve, the air pressure in the annular space will only change slightly due to the deformation of the sealing ring 21 and tend to stabilize. That is, the air pressure in the annular space measured by the air pressure sensor tends to stabilize. At this time, it is determined that the connection between the connecting seat 11 and the sieve seat is an airtight connection. The data measured by the negative pressure meter 12 of the calibration device of the negative pressure sieve is the actual negative pressure when the negative pressure sieve is working. The value displayed on the negative pressure sieve is compared with the value displayed on the negative pressure meter 12, and the negative pressure sieve is calibrated to complete the calibration.

[0017] If the pressure sensor reading is unstable or fluctuates significantly during the process of generating negative pressure in the negative pressure analyzer 12 via the connecting seat 11, it indicates that the connection seat 11 and the sieve seat are not completely sealed. In this case, the sealing ring 21 and the engagement point between the connecting seat 11 and the sieve seat need to be checked, cleaned, or replaced, and then testing should continue. Once the pressure sensor reading stabilizes, the value of the negative pressure analyzer 12 can be compared with the value displayed on the negative pressure analyzer to calibrate the negative pressure analyzer.

[0018] In one embodiment, such as Figures 2-3 As shown, the annular space has a width of 3mm-10mm and a depth of 3mm-5mm, providing a suitable internal volume that allows the pressure sensor to accurately detect minute pressure changes within the annular space, while avoiding response lag caused by excessive space size. By rationally designing the size range of the annular space, it is possible to ensure that pressure changes are quickly captured by the sensor while reducing detection lag caused by excessive space size, thereby improving the sensitivity and accuracy of airtightness monitoring and ensuring reliable calibration results.

[0019] In one embodiment, such as Figure 1 As shown, the air inlet end of the negative pressure meter 12 is provided with a connecting pipe 121, and the connecting seat 11 is connected to the negative pressure meter 12 through the connecting pipe 121. By setting the connecting pipe 121, the negative pressure meter 12 and the connecting seat 11 can be detached and airtightly connected, which facilitates the maintenance, repair and replacement of the equipment, while ensuring the overall airtightness of the system during the negative pressure measurement process, improving the ease of operation and the service life of the equipment.

[0020] The pressure sensor is located at the top of the connector 11. Its detection head extends into the annular space to perform airtightness testing, ensuring both a reasonable arrangement of the sensor and convenient installation and maintenance. Positioning the sensor body at the top of the connector 11 allows for direct external observation and operation, improving the convenience of equipment maintenance and calibration. It also effectively avoids measurement errors caused by improper sensor placement, improving detection accuracy. The pressure sensor is electrically connected to the controller and power supply, and the detection signal can be output and displayed for easy reading of the sensor's readings, quickly determining the airtightness of the annular space.

[0021] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A calibration device for a cement fineness negative pressure sieve analyzer, characterized in that, include: Connecting seat (11) is installed on the sieve seat of the negative pressure sieve analyzer; Two first annular grooves (111) are located at both ends of the connecting seat (11) on the periphery of the contact surface with the screen seat; The second annular groove (112) is located between the two first annular grooves (111); The negative pressure device (12) is airtightly connected to the connecting seat (11). Two sealing rings (21) are snapped into the first annular groove (111), and the two sealing rings (21), the second annular groove (112), and the side wall of the screen seat form an annular space; A barometric pressure sensor, with its detection head located within the annular space, is used to detect the airtightness of the annular space.

2. A device for calibrating a cement fineness negative pressure screen analyzer according to claim 1, characterized in that: The width of the annular space is 3mm-10mm, and the depth is 3mm-5mm.

3. The calibration device for a cement fineness negative pressure sieve analyzer according to claim 2, characterized in that: The negative pressure meter (12) is a negative pressure sensor or a digital pressure gauge.

4. The calibration device for a cement fineness negative pressure sieve analyzer according to claim 1, characterized in that: The air inlet of the negative pressure device (12) is provided with a connecting pipe (121), and the connecting seat (11) is connected to the negative pressure device (12) through the connecting pipe (121).

5. The calibration device for a cement fineness negative pressure sieve analyzer according to claim 1, characterized in that: The pressure sensor is located on top of the connector (11).

Images