Temperature measurement cable component of grain condition measurement and control system

Abstract

The invention discloses a temperature measurement cable component of a grain condition measurement and control system. The component comprises a trunk line (3), M lines of branch lines (2), and M*N temperature measurement cables (1), wherein each temperature measurement cable (1) consists of a field temperature measurement cable lead wire (19), J package mechanisms and injection pressing bodies (70), wherein the J package mechanisms are distributed on the field temperature measurement cable lead wire (19); and the injection pressing bodies (70) are arranged at the lower end of the field temperature measurement cable lead wire (19). The upper ends of the temperature measurement cables (1) are fixedly connected each line of branch lines (2) and are distributed on each line of branch lines (2). Both the branch lines (2) and the trunk line (3) adopt the field temperature measurement cable lead wire (19). The field temperature measurement cable lead wire (19) comprises a No. 1 steel wire lead wire (16), a No. 2 steel wire lead wire (17) and field insulating sleeves (20). The annular insulating sleeves on the periphery of the No. 1 steel wire lead wire (16) and the No. 2 steel wire lead wire (17) are connected into a whole by the intermediate plate part of the field insulating sleeves (20).

Description

technical field [0001] The invention relates to a temperature measuring device for storing grain, oil and other substances, more specifically, the invention relates to a temperature measuring cable assembly of a grain condition monitoring and control system. Background technique [0002] see figure 1 , Grain monitoring and control system is an essential equipment for modern grain and oil storage. Its main function is to measure the temperature of grain in the granary. There are national industry standards for the grain monitoring and control system. The grain condition measurement and control system is mainly composed of three major components: computer, extension, and temperature measurement cable assembly; The figure shows that the temperature measurement cable assembly consists of a trunk line, M columns of branch lines and N temperature measurement cables in each column. [0003] It is not difficult to see from the figure that the temperature measurement cable assembl...

AI Technical Summary

Problems solved by technology

[0007] 1. The shape design of the insulating jacket of the current temperature measuring cable conductor is not reasonable enough, and the cross-sectional area of ​​the insulating jacket is large, resulting in a waste of insulating materials; and when the temperature measuring cable is inserted into granular or powdery substances such as grain, Greater resistance to insertion;

[0008] 2. When maintaining the grain situation measurement and control system, the single-point replacement of the temperature sensor cannot be performed at the site where the grain situation measurement and control system is used, but the entire temperature measurement cable where the faulty temperature sensor is located must be replaced, and the maintenance cost is high;

[0009] 3. Both the branch line and the main line are connected with ordinary connecting wires with low tension, and are connected by several connector needles with the same structure, several connector holes with the same structure, and several branch devices with the same structure. The mechanical strength is low. The tensile strength is small; at the same time, several connector needles with the same structure, several connector holes with the same structure, and several branches with the same structure are easily corroded by environmental factors such as fumigation drugs for food insect pests, and grain situation measurement and control Low system reliability leads to high failure rate and high maintenance cost of the grain monitoring and control system

Because the feeding cable sleeve of the current temperature measuring cable is made by winding one of the two steel wire conductors of the temperature measuring cable conductor back to 180° and pressing it with a metal collar, and cutting the other steel wire conductor Short (the two steel wires are the two poles of the temperature sensor, they need to be insulated and cannot be short-circuited), so the insertion tension of the temperature measurement cable is only borne by one steel wire in the entire temperature measurement cable, and the metal collar bears the tension It is also relatively large (all the insertion tension is carried by the metal collar). The above reasons lead to the low mechanical strength of the feeding cable sleeve of the current temperature measuring cable, the low tension load, and the metal collar is also easily damaged.

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