Deep gas measuring device for squat silo

Abstract

The utility model provides a deep gas measuring device for a squat silo, which comprises a main rod, a sampling probe tube, a gas measuring tube, a gas detecting terminal, a temperature measuring cable and a temperature measuring terminal so as to construct a multi-dimensional three-dimensional grain condition monitoring system. Wherein the gas measuring pipe and the temperature measuring cable are integrated in the main rod, so that the three-in-one three-dimensional gas monitoring module with the sampling probe pipe, the gas measuring pipe and the gas detection terminal is constructed, and gas path blockage and cable failure caused by deformation due to compression in the deep layer of a grain pile can be avoided. Meanwhile, gas detection collection points are arranged according to different depths, so that a gas collection point position covering the full depth of a grain pile is formed in the whole bin, and the gas detection terminal receives a gas sample of a gas detection pipe passing through a test point position where the sampling probe pipe is located and records a gas concentration value of the deep point position; therefore, the gas concentration of the deep layer of the grain pile of the squat silo is effectively and accurately detected, the problem of environment monitoring blind areas of the deep grain pile is effectively solved, manual operation during gas detection can be reduced, and the management efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the fields of shallow circular silo grain condition detection and deep gas detection, and in particular to a shallow circular silo deep gas detection device. Background Technology

[0002] Shallow circular silos are cylindrical above-ground grain silos with a height-to-diameter ratio of less than 1.5. They are mostly flat-bottomed, and the main body of the silo walls is mostly reinforced concrete. Currently, deep grain condition monitoring in shallow circular silos mainly relies on probe detection and pre-embedded sensor detection. These detection methods can only obtain local samples and cannot build a wider range of full-silo sample data. While pre-embedded sensor arrays improve coverage, their complex wiring and the fact that deep pressure deformation of the grain pile can easily cause air path blockage and sensor failure are problems. Utility Model Content

[0003] To address the shortcomings mentioned above in the background technology, this utility model provides a shallow circular chamber deep gas measurement device.

[0004] The present invention adopts the following technical solution:

[0005] A shallow circular chamber deep gas measurement device, the device comprising:

[0006] The main rod is vertically fixed inside the shallow circular silo;

[0007] Multiple sampling probes are arranged along the height direction of the main rod, and air inlet holes are distributed on the surface of the sampling probes;

[0008] A gas measuring tube connected to the sampling probe, the gas measuring tube being inserted into the main rod and extending upward beyond the top of the main rod;

[0009] A gas detection terminal is connected to the gas measuring tubes, and the gas detection terminal is configured to receive gas samples from all the gas measuring tubes.

[0010] In one possible implementation, the top and bottom walls of the shallow cylindrical container are respectively provided with detachable fasteners at the installation positions of the main rod, and the top and bottom ends of the main rod are provided with wire rings, and the two wire rings are respectively fitted with the two fasteners.

[0011] In one possible implementation, the gas measuring tube is positioned relative to the wire ring and close to the outer side of the main rod.

[0012] In one possible implementation, the main rod has a cross-shaped cross section, and the two ends of the wire ring are respectively fixed to one set of corresponding sides of the end of the main rod, while the gas measuring tubes are evenly distributed inside the other set of corresponding sides of the main rod.

[0013] In one possible implementation, the sampling probe is fixed to the outside of the main rod by a clamp connection.

[0014] In one possible implementation, the bottom of the sampling probe is provided with a through-hole for dust removal.

[0015] In one possible implementation, the device further includes a temperature measuring cable passing through the main rod, one end of which extends to the outside of the main rod and is connected to a temperature measuring terminal, the temperature measuring terminal being configured to synchronously collect temperature data from the temperature measuring cable.

[0016] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages: This utility model constructs a three-dimensional gas monitoring module integrating a sampling probe, a gas measuring tube, and a gas detection terminal through the main rod, and integrates the gas measuring tube inside the main rod to form protection, avoiding gas path blockage caused by deep pressure deformation of the grain pile.

[0017] In addition, multiple sampling probes distributed longitudinally along the main pole form gas collection points covering the entire depth of the grain pile. Each gas sampling probe is connected to a gas detection terminal via a gas measuring tube, allowing the gas detection terminal to receive gas samples from the test points where the sampling probes pass through. After concentration analysis and point marking by the gas detection terminal, the gas concentration value at that deep point is recorded. This enables effective and accurate detection of gas concentration in the deep layers of shallow circular grain piles, effectively solving the problem of blind spots in deep grain pile environmental monitoring. Furthermore, it reduces manual operation during gas detection, thereby improving management efficiency. Attached Figure Description

[0018] Figure 1 A schematic diagram showing the installation of this utility model inside a shallow circular hopper.

[0019] Figure 2 for Figure 1 A magnified diagram of point A in the middle.

[0020] Figure 3 for Figure 1 A magnified diagram of point B in the middle.

[0021] Figure 4 This is a schematic diagram of the sampling probe connected to the middle section of the main rod.

[0022] Figure 5 This is a top-view sectional view of the main rod after it is connected to the wire ring, gas measuring tube, and temperature measuring cable, when the main rod cross-section is of a conventional shape (e.g., elliptical).

[0023] Figure 6 This is a top-view sectional view of the main rod after it is connected to the wire ring, gas measuring tube, and temperature measuring cable, when the main rod cross section is cross-shaped.

[0024] Figure 7 This is a schematic diagram showing the signal connections of the sampling probe, gas detection terminal, temperature measurement terminal, etc. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0026] In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, in this application, directional terms such as "upper" and "lower" are defined relative to the indicated placement of components in the accompanying drawings. It should be understood that these directional terms are relative concepts used for relative description and clarification, and they may change accordingly depending on the placement of components in the accompanying drawings.

[0027] This utility model provides a shallow circular chamber 1 deep gas measurement device, as shown in the attached figure. Figure 1 and 6 As shown, the device includes a main rod 2, a sampling probe 4, a gas measuring tube 3, and a gas detection terminal 5, as well as a temperature measuring cable 6 and a temperature measuring terminal, thus constructing a multi-dimensional grain condition monitoring system. (See attached diagram.) Figure 4 and 5 Both the gas measuring tube 3 and the temperature measuring cable 6 are covered by the main rod 2, so that the main rod 2 forms a protection for the gas measuring tube 3 and the temperature measuring cable 6, avoiding the gas measuring tube 3 and the temperature measuring cable 6 from being subjected to pressure changes in the deep layers of the grain pile, which could cause gas path blockage and cable failure.

[0028] Please refer to the appendix. Figure 2 and 3 The main rod 2 is vertically fixed inside the shallow circular silo 1, and its fixing method can be through fastening buckles 22 and wire rings 21. Specifically, fastening buckles 22 are respectively provided on the top and bottom walls of the shallow circular silo 1 at the installation positions of the main rod 2. The fastening buckles 22 can be detachable fasteners for connecting steel pipes in the prior art, and their bases are fixed inside the shallow circular silo 1, so that the main rod 2, gas measuring tube 3, temperature measuring cable 6, and sampling probe 4 can be disassembled and transferred to other shallow circular silos 1 at one time. Wire rings 21 are provided at both the top and bottom ends of the main rod 2. When installing the main rod 2, the fastening buckles 22 are removed, and then the fastening buckles 22 are passed through the wire rings 21 and reinstalled and fixed to the top or bottom wall of the shallow circular silo 1. This allows the wire rings 21 and the fastening buckles 22 to form a through-fit, thereby restricting the main rod 2 to remain vertical and ensuring that the main rod 2 remains vertically stable under the dynamic pressure of the grain pile.

[0029] Preferably, the main rod 2 can be a rod-shaped sheath made of HDPE material, manufactured using an insert injection molding process. First, the gas measuring tube 3, temperature measuring cable 6, and both ends of the steel wire ring 21 are precisely positioned within the mold cavity for making the main rod 2. Then, molten HDPE material is injected into the mold cavity to form the shape of the main rod 2, ultimately forming an integrated structure where the main rod 2 covers the gas measuring tube 3, temperature measuring cable 6, and steel wire ring 21. The cross-section of the main rod 2 can be... Figure 3The structure is elliptical, and the end of the gas measuring tube 3 relative to the wire ring 21 is close to the outside of the main rod 2 to facilitate the installation and maintenance of the gas measuring tube 3. The cross-section of the main rod 2 can also be... Figure 6 The cross-shaped structure shown has a center for mounting the temperature measuring cable 6. The two ends of the steel wire ring 21 are fixed to one of the corresponding sides of the end of the main rod 2. The gas measuring tube 3 is installed inside the other corresponding side of the main rod 2, making the overall structure compact and the layout reasonable, which facilitates the centralized installation and maintenance of the line, while reducing mutual interference between pipelines.

[0030] Multiple sampling probes 4 are arranged along the height of the main rod 2, so that each sampling probe 4 forms a fixed test point relative to the internal height of the shallow circular silo 1. Specifically, the sampling probes 4 can be fixed to the outside of the main rod 2 by clamping with clamps 23, so that the sampling probes 4 can be adjusted according to the requirements of grain pile depth detection. Preferably, sampling probes 4 are arranged on both sides outside the main rod 2, and gas measuring tubes 3 are arranged on both sides inside the main rod 2. The gas measuring tubes 3 on both sides inside the main rod 2 are respectively connected to the sampling probes 4 arranged on both sides outside the main rod 2, thereby expanding the detection range.

[0031] The sampling probe 4 has air inlets 401 distributed on its surface. These inlets allow gas to enter while keeping the grain out, thus acting as a filter. The gas measuring tube 3 is preferably a flexible tube. One end of the gas measuring tube 3 is connected to the sampling probe 4, and the other end is connected to the gas detection terminal 5. Preferably, the gas detection terminal 5 has a built-in gas measuring chamber and an air pump. The gas measuring chamber is equipped with a gas concentration sensing probe to detect the gas concentration. Each gas measuring tube 3 is connected to one end of the gas measuring chamber, and the other end of the chamber is connected to the air pump. The air pump draws air into the gas measuring chamber, allowing the gas detection terminal 5 to receive gas samples from all the gas measuring tubes 3 at the test points where the sampling probe 4 is located. After concentration analysis and point marking by the gas detection terminal 5, the gas concentration value at the deep point is recorded, thereby effectively and accurately detecting the gas concentration in the deep layers of the grain pile in the shallow circular silo 1, avoiding insufficient control over the gas concentration generated in the deep layers of the grain pile.

[0032] Furthermore, the gas detection terminal 5 is equipped with solenoid valves at the ports connecting the gas detection chamber to each gas detection tube 3 to control the air intake and shut-off of the gas detection tube 3. That is, when the gas pump is started, it controls the opening of specific solenoid valves to directionally draw gas samples from the depth of the target sampling probe 4 into the gas detection chamber for detection, while the other valves remain closed to avoid cross-interference of gas paths. This design can analyze the concentration gradients of gases such as CO2, O2, and PH3 in the grain pile layer by layer, and can accurately identify local abnormal points. Compared with the traditional single-point detection method, it can improve the spatial resolution of gas detection, and is particularly suitable for early warning of pests in deep grain piles and effective monitoring of the controlled atmosphere concentration in deep grain piles during controlled atmosphere operations.

[0033] Continue to refer to the appendix Figure 3To prevent dust accumulation at the bottom of the sampling probe 2, a through-hole 402 can be provided at the bottom of the sampling probe 4 to allow dust to fall through. Furthermore, one end of the gas measuring tube 3 can be connected to the port of an air compressor, allowing compressed air to be blown in reverse from the gas measuring tube 3 to the sampling probe 4. This airflow simultaneously blows away residual dust from the sampling probe 4 and the gas measuring tube 3 through the dust outlet 402 and the air inlet 401, achieving a pipeline cleaning function, maintaining unobstructed airflow, and preventing dust accumulation at the bottom of the sampling probe 4, thus ensuring accurate gas sampling.

[0034] As attached Figure 5 and 7 As shown, one end of the temperature sensing cable 6 extends to the upper end of the main rod 2 and is electrically connected to the temperature sensing terminal. When the temperature inside the shallow circular chamber 1 changes, the carrier concentration or mobility inside the temperature sensing cable 6 changes, causing the resistance value to change systematically. The temperature sensing terminal applies a constant current and measures the voltage difference across the temperature sensing cable 6, then combines this with a pre-calibrated resistance-temperature (RT) curve to accurately infer the temperature of the temperature sensing cable 6, thereby synchronously acquiring the temperature data of the temperature sensing cable 6. Furthermore, in this process, the temperature sensing terminal continuously converts thermal energy into electrical signals, enabling dynamic monitoring of the temperature gradient and rate of change within the shallow circular chamber 1.

[0035] Furthermore, this invention can also be configured with a host computer platform, which can be a central monitoring platform for monitoring the internal air environment of the shallow circular chamber 1. The host computer platform interfaces with the gas detection terminal 5 and the temperature measurement terminal through an industrial-grade communication interface to obtain the gas concentration values ​​of each gas measurement point in real time, and finally summarizes the gas concentration values ​​of each gas measurement point in the chamber and displays them on the host computer platform.

[0036] In summary, this invention integrates a gas measuring tube 3 and a temperature measuring cable 6 inside the main pole 2. Through modular integration design, a three-dimensional gas monitoring module consisting of a sampling probe 4, a gas measuring tube 3, and a gas detection terminal 5 is constructed via the main pole 2. Multiple sampling probes 4 distributed longitudinally along the main pole 2 form gas collection points covering the entire depth of the grain pile. Each sampling probe 4 is connected to the gas detection terminal 5 via a flexible gas measuring tube 3. Combined with the time-division gate technology of the solenoid valve, multi-layer directional gas suction and detection driven by a single gas pump is realized, effectively eliminating cross-contamination of multiple gas paths. A closed monitoring loop is formed with the external temperature measuring terminal through the temperature measuring cable 6, constructing a temperature detection module to provide data support for early warning of mold growth in deep grain piles. Therefore, the main pole 2 serves as the core carrier integrating the gas and temperature measuring modules. This modular integration design enables simultaneous detection of gas and temperature at multiple depths in the grain pile, effectively solving the problem of blind spots in deep grain pile environmental monitoring and reducing manual operation during gas detection, thereby improving management efficiency.

[0037] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A shallow circular chamber deep gas measurement device, characterized in that, The device includes: The main rod is vertically fixed inside the shallow circular silo; Multiple sampling probes are arranged along the height direction of the main rod, and air inlet holes are distributed on the surface of the sampling probes; A gas measuring tube connected to the sampling probe, the gas measuring tube being inserted into the main rod and extending upward beyond the top of the main rod; A gas detection terminal is connected to the gas measuring tubes, and the gas detection terminal is configured to receive gas samples from all the gas measuring tubes.

2. The apparatus as claimed in claim 1, characterized in that, The top and bottom walls of the shallow cylindrical container are respectively provided with detachable fasteners at the installation positions of the main rod. The top and bottom ends of the main rod are provided with wire rings, which are fitted together with the fasteners.

3. The apparatus as described in claim 2, characterized in that, The gas measuring tube is located near the outer side of the main rod relative to the wire ring.

4. The apparatus as claimed in claim 2, characterized in that, The main rod has a cross-shaped cross section. The two ends of the steel wire ring are respectively fixed to one set of corresponding sides of the end of the main rod, and the gas measuring tubes are evenly distributed inside the other set of corresponding sides of the main rod.

5. The apparatus as claimed in claim 1, characterized in that, The sampling probe is fixed to the outside of the main rod by a clamp connection.

6. The apparatus as described in claim 1 or 4, characterized in that, The bottom of the sampling probe is provided with a through-hole for dust removal.

7. The apparatus as claimed in claim 1, characterized in that, The device also includes a temperature measuring cable that passes through the main pole, one end of which extends to the outside of the main pole and is connected to a temperature measuring terminal, which is configured to synchronously collect the temperature data of the temperature measuring cable.

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