Differential pressure type material level monitoring assembly and material height monitoring bin

Abstract

The utility model relates to a differential pressure type material level monitoring assembly and a material height monitoring bin, the monitoring assembly is used for being connected with a detection opening in the outer wall of a material bin, the monitoring assembly comprises a detection cavity, an air supply pipeline and a pressure switch, the detection cavity is obliquely arranged, and the lower end of the detection cavity is used for being connected with the detection opening; the gas supply pipeline is connected with the detection cavity, and the gas supply pipeline is used for introducing detection gas into the detection cavity; the pressure switch is connected with the detection cavity and used for detecting the pressure value in the detection cavity and feeding back whether materials in the stock bin seal the detection opening or not according to the pressure value. By adopting the scheme, the monitoring assembly does not need to extend into the stock bin, so that stirring in the stock bin or arrangement of other structures are facilitated; in addition, through the structure that the detection cavity is obliquely arranged and the lower end is connected with the detection port, the situation that internal parts of the monitoring assembly are submerged by materials and consequently the monitoring assembly breaks down is effectively reduced, and the fault rate of the monitoring assembly is effectively reduced. The equipment is flexible in mounting position, high in interchangeability and simple and convenient to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to material bin technical field, especially a kind of differential pressure type material level monitoring assembly and material height monitoring bin. BACKGROUND

[0002] Because solid granular material, such as mineral powder, iron oxide powder, fly ash etc. will produce a large amount of dust in the process of loading and unloading, the dust seriously interferes with laser, radar and ultrasonic signals, so the storage warehouse of such materials cannot use laser, radar or ultrasonic sensors to detect the material level.

[0003] Traditionally, mechanical impeller material level meter is generally used to detect the material level, and whether the material level is higher or lower than the detection point is judged by whether the material blocks the rotation of the impeller. But this impeller type material level meter must be in contact with the material, and the impeller is easy to be worn and corroded by the material, and the material attached to the impeller is also easy to interfere with the detection result, so the failure rate and false alarm rate of this material level meter are high in use.

[0004] Therefore, the device adopting differential pressure principle is used to judge the height of the material, and the existing device adopting differential pressure principle is a hollow pipeline and is vertically arranged, the device extends into the bin from the top of the bin, so as to feedback the material height in the bin according to the measured pressure change. But the existing structure has certain defects, such as the pipeline extends into the bin along the top, so that the extension length of the pipeline is limited, which leads to the inability to be used in large bins; since the pipeline extends into the bin from the top for measurement, a large amount of internal space of the bin is occupied, so as to affect the arrangement of the remaining structures in the bin. SUMMARY

[0005] Therefore, a differential pressure type material level monitoring assembly and material height monitoring bin are provided to solve the problem that the detection equipment needs to extend into the bin, thereby affecting the arrangement of the structures in the bin.

[0006] In one aspect, the utility model provides a differential pressure type material level monitoring assembly, the monitoring assembly is used to be connected with the detection port of bin outer wall, and the monitoring assembly comprises:

[0007] A detection cavity is arranged obliquely, and the lower end of the detection cavity is used to be connected with the detection port;

[0008] A gas supply pipeline is connected with the detection cavity, and the gas supply pipeline is used to introduce detection gas into the detection cavity;

[0009] A pressure switch is connected with the detection cavity, and the pressure switch is used to detect the pressure value in the detection cavity and feedback whether the material in the bin seals the detection port according to the pressure value.

[0010] On the basis of the above technical solutions, the utility model further can make improvement as follows.

[0011] In one of the implementation manners, the monitoring assembly further comprises:

[0012] The regulating valve is connected to the gas supply pipeline and used for regulating the flow of the detection gas.

[0013] In one of the implementation manners, the monitoring assembly further comprises:

[0014] The pressure reducing valve is connected to the gas supply pipeline and used for regulating the pressure of the detection gas.

[0015] The ball valve is connected to the gas supply pipeline, and the ball valve and the pressure reducing valve are sequentially arranged in the direction of the detection gas entering the detection cavity.

[0016] In one of the implementation manners, the monitoring assembly further comprises:

[0017] The one-way valve is connected to the gas supply pipeline and arranged between the pressure reducing valve and the detection cavity.

[0018] In one of the implementation manners, the gas supply pipeline is connected to the upper middle part of the detection cavity.

[0019] In one of the implementation manners, the detection cavity has a hollow tubular structure, and the axis of the detection cavity is obliquely arranged.

[0020] In one of the implementation manners, the monitoring assembly further comprises:

[0021] The maintenance flange is detachably connected to the upper end of the detection cavity.

[0022] The connecting flange is detachably connected to the lower end of the detection cavity, and the connecting flange detachably connects the monitoring assembly to the silo.

[0023] In one of the implementation manners, the diameter of the detection cavity is not less than three times the diameter of the gas supply pipeline.

[0024] On the other hand, the utility model further provides a material height monitoring silo, which comprises a silo and a pressure-difference type material level monitoring assembly, and the connection position of the pressure switch and the detection cavity is higher than the highest point of the detection port.

[0025] In one of the implementation manners, the silo comprises:

[0026] The silo body is used for containing the material.

[0027] The branch pipe is obliquely upwardly extended along the side wall of the silo, the upper end of the branch pipe is detachably connected to the lower end of the detection cavity, and the lower end of the branch pipe is fixed at the detection port.

[0028] The utility model discloses a beneficial effect is: the application is through the gas supply pipeline to the detection cavity into the detection gas, because the detection cavity one end is connected with the detection mouth, can know before the detection mouth is blocked by material, the pressure in the corresponding detection cavity will be released in time, make the pressure value of the detected pressure will not have the big change amplitude, but if the detection mouth is blocked by material, the pressure in the detection cavity will not be released and will have obvious increment, thus through the pressure switch to the gas pressure of detection gas is detected, thereby can feedback whether the material seals the detection mouth, to judge whether the height of material is higher than the detection mouth, because the detection cavity is the structure that sets up obliquely, and the lower end of detection end is connected with the detection mouth of bunker, thereby reduce the material that enters the detection cavity, to reduce the installation height of pressure switch is submerged by material, also can reduce the probability of material inflow gas supply pipeline, reduce the monitoring component failure condition, in conclusion, through the monitoring component setting up the structure that is connected with the bunker outer wall, make the monitoring component not need to extend into the bunker, thereby reduce the influence to the bunker, the convenient bunker in stirring or rest structure is set, in addition, through the structure that the detection cavity sets up obliquely and is connected with the detection mouth, effectively reduce the monitoring component internal component is submerged by material and cause the monitoring component failure condition, effectively reduce the failure rate of monitoring component, the device uses the influence of material position to the gas pressure in detection cavity to judge whether the material level reaches the set height, equipment installation position is flexible, can be installed in bunker any position, equipment failure rate is low, monitoring result is accurate, equipment interchangeability is high, maintenance is simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the structural diagram of pressure difference type material level monitoring assembly in an embodiment.

[0030] In the drawings, the components represented by each reference numeral are as follows:

[0031] 11, detection cavity, 12, gas supply pipeline, 13, pressure switch, 14, regulating valve, 15, pressure reducing valve, 16, ball valve, 17, check valve, 18, maintenance flange, 19, connecting flange,

[0032] 21, detection mouth, 22, bunker body, 23, branch pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described here are only used to explain the present application, and are not used to limit the present application.

[0034] The structure, proportion, size and the like shown in the drawings attached to the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and do not define the limiting conditions that can be implemented by the utility model, so they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by the utility model and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the utility model.

[0035] A differential pressure type material level monitoring assembly, see Figure 1 The monitoring assembly is used in connection with the detection port 21 of the outer wall of the bin, and comprises a detection cavity 11, a gas supply pipeline 12 and a pressure switch 13. The detection cavity 11 is arranged obliquely, and the lower end of the detection cavity 11 is used in connection with the detection port 21. The gas supply pipeline 12 is connected with the detection cavity 11, and is used to introduce detection gas into the detection cavity 11. The pressure switch 13 is connected with the detection cavity 11, and is used to detect the pressure value in the detection cavity 11 and feed back whether the material in the bin seals the detection port 21 according to the pressure value.

[0036] With the scheme, the detection gas is introduced into the detection cavity 11 through the gas supply pipeline 12. Since one end of the detection cavity 11 is connected with the detection port 21, it can be known that the pressure in the corresponding detection cavity 11 will be released in time before the detection port 21 is blocked by the material, so that the detected pressure value will not have a large change range. However, if the detection port 21 is blocked by the material, the pressure in the detection cavity 11 will not be released and will have a significant increase. Therefore, the pressure of the detection gas is detected by the pressure switch 13, so that whether the material seals the detection port 21 can be fed back, to determine whether the height of the material is higher than the detection port 21. Since the detection cavity 11 is arranged obliquely, and the lower end of the detection end is connected with the detection port 21 of the bin, the material entering the detection cavity 11 is reduced, so as to reduce the condition that the installation height of the pressure switch 13 is submerged by the material, and also can reduce the probability of the material flowing into the gas supply pipeline 12, to reduce the failure condition of the monitoring assembly. In summary, by arranging the monitoring assembly in the structure connected with the outer wall of the bin, the monitoring assembly does not need to be inserted into the bin, so as to reduce the influence on the bin, and facilitate the setting of stirring or other structures in the bin. In addition, by arranging the detection cavity 11 obliquely and connecting the lower end with the detection port 21, the condition that the internal components of the monitoring assembly are submerged by the material and cause the failure of the monitoring assembly is effectively reduced, and the failure rate of the monitoring assembly is effectively reduced. The device uses the influence of the material position on the gas pressure in the detection cavity 11 to determine whether the material level reaches the set height. The installation position of the equipment is flexible, and the equipment can be installed at any position of the bin. The equipment has low failure rate, accurate monitoring result, high interchangeability and simple and convenient maintenance.

[0037] Specifically, the pressure switch 13 is adopted in the application, the cost of the pressure switch 13 is low, and the pressure switch 13 plays a role in facilitating cost control. In addition, the pressure switch 13 can realize automatic control of other devices without relying on PLC in necessary cases. When the pressure switch 13 is used to monitor the pressure of the detection cavity 11, if the detected pressure is less than the preset pressure threshold, a high voltage is output and the first signal is output; if the detected pressure is greater than the preset pressure threshold, a low voltage is output and the second signal is output. The working pressure of the pressure switch 13 is 0 ～ 100 KPa, and the threshold adjustment range is 0 ～ 100 KPa, and the DC 24V power supply is used.

[0038] In the embodiment, when the detection cavity 11 is connected with the pressure switch 13, a hole is needed to be opened at a suitable position of the detection cavity 11, and the interface of the pressure switch 13 is fixed to the hole of the detection cavity 11 by welding.

[0039] In the specific embodiment, when the material height rises to the lower end of the detection cavity 11, the pressure value measured by the pressure switch 13 will exceed the preset pressure threshold. Through the judgment of the control system, a corresponding material height prompt can be sent, such as a signal of the material height being too high. According to the pressure value not exceeding the preset pressure threshold, a signal of the material height being low can also be sent.

[0040] In the specific embodiment, the detection gas is compressed air.

[0041] In some embodiments, the monitoring assembly further comprises an adjusting valve 14 connected to the gas supply pipeline 12 and used for adjusting the flow of the detection gas. In this way, the adjusting valve 14 is arranged to facilitate real-time adjustment of the flow of the detection gas, such as adjustment of the flow of the gas according to the type of the material in the silo, so as to avoid the situation that the material at the detection port 21 is blown away due to excessive flow, thereby causing inaccurate measurement of the material height, and effectively improving the accuracy of the monitoring assembly in detecting the material height.

[0042] In some embodiments, the monitoring assembly further comprises a pressure reducing valve 15 and a ball valve 16, the pressure reducing valve 15 is connected to the gas supply pipeline 12 and used to adjust the pressure of the detection gas; the ball valve 16 is connected to the gas supply pipeline 12, and the ball valve 16 and the pressure reducing valve 15 are arranged in sequence in the direction of the detection gas entering the detection cavity 11. In this way, by arranging the pressure reducing valve 15, the pressure of the detection gas is adjusted to avoid the situation that the detection gas has too high pressure, thereby reducing the situation that the material at the detection port 21 is squeezed out by the excessive pressure, and the accuracy of the monitoring assembly in detecting the material height is improved. The ball valve 16 is arranged in the direction close to the inlet of the detection gas, fully utilizes the characteristics that the ball valve 16 can withstand high-pressure gas, and utilizes the characteristics that the ball valve 16 has strong pressure resistance to adjust the pressure of the detection gas and protect the pressure reducing valve 15. The ball valve 16 has strong cutting ability and good sealing performance, and the ball valve 16 is arranged at the connection end of the detection gas, thereby facilitating the adjustment of the on-off of the detection gas.

[0043] In some embodiments, the monitoring assembly further comprises a one-way valve 17, the one-way valve 17 is connected to the gas supply pipeline 12, and the one-way valve 17 is arranged between the pressure reducing valve 15 and the detection cavity 11. In this way, the one-way valve 17 is arranged close to the detection cavity 11, and the one-way valve 17 is used to protect the pressure reducing valve 15 by utilizing the one-way conduction and reverse cut-off function of the one-way valve 17.

[0044] In specific embodiments, the ball valve 16, the pressure reducing valve 15, the regulating valve 14 and the one-way valve 17 are arranged in sequence in the direction of the detection gas entering the detection cavity 11. The ball valve 16 is fully utilized to have strong pressure resistance, so that the ball valve 16 protects the pressure reducing valve 15, the regulating valve 14 and the one-way valve 17. The one-way valve 17 has the effect of one-way conduction and reverse cut-off, and the one-way valve 17 is arranged close to the detection cavity 11, so that the one-way valve 17 protects the ball valve 16, the pressure reducing valve 15 and the regulating valve 14 in the monitoring assembly, and prevents the material from flowing back to the ball valve 16, the pressure reducing valve 15 and the regulating valve 14.

[0045] In embodiments, the pressure of the compressed air supply is 100-600 KPa; the one-way valve 17 is used to prevent the material in the silo from entering the gas supply pipeline 12 system, and the working pressure of the one-way valve 17 is 0-600 KPa; the regulating valve 14 is used to adjust the flow of the gas supplied to the detection pipeline, and the working pressure of the regulating valve 14 is 0-600 KPa; the pressure reducing valve 15 is used to reduce the pressure of the gas supplied to the detection pipeline, the inlet pressure of the pressure reducing valve 15 is 0-1000 KPa, and the outlet pressure is 0-100 KPa; the ball valve 16 is used to open or cut off the gas supply of the gas supply pipeline 12, and the working pressure of the ball valve 16 is 0-1000 KPa. The size of each valve is selected according to the size of the gas supply pipeline 12.

[0046] In some embodiments, the gas supply pipe 12 is connected to the upper middle part of the detection chamber 11. Thus, when the pressure value reported by the pressure switch 13 exceeds a preset pressure threshold, the material will inevitably block the detection port 21. In some monitoring component designs, material may enter the lower end of the detection chamber 11. Connecting the gas supply pipe 12 to the upper middle part of the detection chamber 11 effectively reduces the possibility of material submerging the connection between the gas supply pipe 12 and the detection chamber 11, preventing material backflow into the gas supply pipe 12 and reducing the frequency of maintenance and cleaning.

[0047] Specifically, the pressure switch 13 can also be configured to be connected to the upper middle part of the detection chamber 11, so as to reduce the possibility of material submerging the connection position between the pressure switch 13 and the detection chamber 11.

[0048] In a specific embodiment, the gas supply pipe 12 and the pressure switch 13 are spaced apart to ensure that there is a certain distance between them. This ensures that the pressure value detected by the pressure switch 13 is not affected by the pressure inside the gas supply pipe 12, thereby improving the accuracy of the pressure value detected by the pressure switch 13. In a specific setting, when the detection chamber 11 is cylindrical, the gas supply pipe 12 and the pressure switch 13 are staggered circumferentially in the detection chamber 11, thereby increasing the distance between the gas supply pipe 12 and the pressure switch 13, thus reducing the influence of the gas supply pipe 12 on the detection value of the pressure switch 13.

[0049] In some embodiments, the detection cavity 11 is a hollow tubular structure, and the axis of the detection cavity 11 is inclined. In this way, the structure of the detection cavity 11 is set as a regular tubular shape, which facilitates the setting of the connection structure between the detection cavity 11 and the hopper. In addition, the axis of the detection cavity 11 is inclined to ensure that the detection cavity 11 is in an inclined structure, so that only the lower part of the detection cavity 11 is connected to the hopper.

[0050] In this embodiment, the detection cavity 11 is inclined and has a slope of not less than 30°. For example, see [link to example]. Figure 1 The angle between the axis of the detection cavity 11 and the vertical direction is 60°.

[0051] In some embodiments, the monitoring component further includes an inspection flange 18 and a connecting flange 19. The inspection flange 18 is detachably connected to the upper end of the detection chamber 11; the connecting flange 19 is detachably connected to the lower end of the detection chamber 11, and the connecting flange 19 detachably connects the monitoring component to the hopper. Thus, the inspection flange 18 facilitates disassembly, maintenance, and cleaning of the end of the monitoring component; the connecting flange 19 facilitates the complete removal of the monitoring component from the hopper, allowing the monitoring component to be flexibly moved to the location where the material height needs to be measured, thereby enabling the monitoring component to be installed and utilized in different locations.

[0052] In specific embodiments, the specific connection mode of the inspection flange 18 and the connection flange 19 can adopt threaded connection, such as the circumferential threaded connection of the flanges, and the corresponding sealing structure is arranged between the adjacent flanges, so as to ensure that the detection cavity 11 is a sealed cavity. The sealing structure can adopt a sealing ring for circumferential sealing of the flanges.

[0053] In some embodiments, the diameter of the detection cavity 11 is not less than three times the diameter of the gas supply pipeline 12. In this way, since the detection gas introduced into the gas supply pipeline 12 is compressed gas, by making the diameters of the detection cavity 11 and the gas supply pipeline 12 have a certain distance, the pressure of the detection cavity 11 is prevented from rising too fast when the detection gas is introduced, so as to reduce the pushing force of the detection gas on the material at the detection port 21, thereby improving the accuracy of the height judgment of the material.

[0054] In specific embodiments, during measurement, the pressure switch 13 is connected to the control system, and the control system is provided with a corresponding preset pressure threshold. When the material in the silo is lower than the position of the detection port 21, the connection position of the detection cavity 11 and the detection port 21 is in an open state, and the gas pressure in the detection cavity 11 can be quickly released, and the first pressure in the detection pipeline is much smaller than the second pressure in the gas supply pipeline 12.

[0055] When the material height in the silo is higher than the position of the detection port 21, and the detection port 21 is blocked by the material, the gas pressure in the detection cavity 11 cannot be released, and after the continuous introduction of the detection gas, the first pressure in the detection pipeline increases and approaches the second pressure in the gas supply pipeline 12.

[0056] Therefore, based on the above, the control system has the following two judgment results based on the judgment of the first pressure and the preset pressure threshold:

[0057] 1. When the first pressure reaches the preset pressure threshold, the control system judges that the material height in the silo is higher than the monitoring position, and the control system will issue a signal to prompt that the material height is too high, so as to stop the feeding operation or alarm.

[0058] 2. When the first pressure is less than the preset pressure threshold, the control system judges that the material position in the silo is higher than the monitoring position, and the control system will issue a signal to prompt that the material height is in a low position.

[0059] In specific embodiments, the preset pressure threshold is flexibly set according to the use, and the preset pressure threshold can be set as half of the second pressure.

[0060] In one embodiment, when the detection cavity 11 and the gas supply pipeline 12 are regular pipeline structures, the detection cavity 11 has a larger caliber and is DN80, and the gas supply pipeline 12 has a smaller caliber and is DN15; the pipe diameter corresponding to the detection cavity 11 is appropriately selected to be larger, and the gas supply pipeline 12 is appropriately selected to be smaller relative to the detection cavity 11.

[0061] The material height monitoring bin includes a bin and a differential pressure type material level monitoring assembly, and the connection position of the pressure switch 13 and the detection cavity 11 is higher than the highest point of the detection port 21. In this way, the connection position of the pressure switch 13 and the detection cavity 11 can be prevented from being submerged when the material enters the detection cavity 11, so as to ensure that the pressure switch 13 can continuously measure the pressure.

[0062] In some embodiments, the bin includes a bin body 22 and a branch pipe 23, the bin body 22 is used to contain the material, the branch pipe 23 extends upward along the side wall of the bin, the upper end of the branch pipe 23 is detachably connected to the lower end of the detection cavity 11, and the lower end of the branch pipe 23 is fixed at the detection port 21. In this way, the bin is provided with the branch pipe 23, which facilitates the use of the branch pipe 23 to connect the detection assembly, reduces the situation that the control system prompts the highest height of the material while the material enters the detection assembly, and thus facilitates the disassembly and reuse of the detection assembly, and also avoids the submergence and damage of the material to the connection port of the pressure switch 13 and the gas supply pipeline 12 in the detection assembly.

[0063] In specific embodiments, the monitoring assembly can be directly connected to the bin body 22, or a corresponding branch pipe 23 can be arranged on the bin to connect the monitoring assembly and the bin body 22, and whether the branch pipe 23 is arranged is selected based on the space around the bin and the convenience of disassembly of the monitoring assembly.

[0064] In specific embodiments, the branch pipe 23 is arranged to facilitate the connection of the detection cavity 11 and raise the height of the detection cavity 11, and when the control system sends a signal that the material is too high, the height of the material is preferably maintained in the branch pipe 23 and does not enter the detection cavity 11, so as to protect the pressure switch 13 and the gas supply pipeline 12, the one-way valve 17 and the like, and thus the height and length of the branch pipe 23 are reasonably set.

[0065] In some embodiments, when the material blocks the detection port 21 of the bin and causes the control system to alarm the height, the pressure switch 13 still has a certain distance from the top surface of the material in the vertical direction, so as to ensure that the connection position of the pressure switch 13 on the detection cavity 11 is not blocked by the rising material, to protect the pressure switch 13 and facilitate the pressure switch 13 to continuously and accurately measure the pressure in the detection cavity 11.

[0066] In specific embodiments, the application is used to determine whether the material in the silo reaches the height corresponding to the connection position of the monitoring assembly, and if the remaining height in the silo needs to be determined, a corresponding detection opening 21 is opened at the corresponding position of the silo body, so that the monitoring assembly of the application is moved to the detection opening 21 for measurement.

[0067] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0068] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0069] The above-described embodiments only express several embodiments of the application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are within the scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A differential pressure level monitoring component, characterized in that, The monitoring component is used to connect to the detection port (21) on the outer wall of the silo, and the monitoring component includes: The detection cavity (11) is inclined and its lower end is used to connect to the detection port (21); Gas supply pipe (12) is connected to the detection chamber (11) and is used to introduce detection gas into the detection chamber (11); Pressure switch (13) is connected to the detection chamber (11). The pressure switch (13) is used to detect the pressure value in the detection chamber (11) and to provide feedback on whether the material in the hopper is blocking the detection port (21) based on the pressure value.

2. The differential pressure level monitoring component according to claim 1, characterized in that, The monitoring component also includes: A regulating valve (14) is connected to the gas supply pipe (12) and is used to regulate the flow rate of the detection gas.

3. The differential pressure level monitoring component according to claim 1, characterized in that, The monitoring component also includes: Pressure reducing valve (15), which is connected to the gas supply pipe (12) and is used to regulate the pressure of the detection gas; A ball valve (16) is connected to the gas supply pipe (12). The ball valve (16) and the pressure reducing valve (15) are arranged sequentially along the direction in which the detection gas enters the detection chamber (11).

4. The differential pressure level monitoring component according to claim 3, characterized in that, The monitoring component also includes: A one-way valve (17) is connected to the gas supply pipe (12) and is located between the pressure reducing valve (15) and the detection chamber (11).

5. The differential pressure level monitoring component according to claim 1, characterized in that, The gas supply pipe (12) is connected to the upper middle part of the detection chamber (11).

6. The differential pressure level monitoring component according to claim 1, characterized in that, The detection cavity (11) is a hollow tubular structure, and the axis of the detection cavity (11) is inclined.

7. The differential pressure level monitoring component according to claim 6, characterized in that, The monitoring components also include: Inspection flange (18), wherein the inspection flange (18) is detachably connected to the upper end of the detection chamber (11); A connecting flange (19) is detachably connected to the lower end of the detection chamber (11), and the connecting flange (19) detachably connects the monitoring component to the hopper.

8. The differential pressure level monitoring component according to claim 6, characterized in that, The diameter of the detection chamber (11) is not less than three times the diameter of the gas supply pipe (12).

9. A material height monitoring bin, characterized in that, Includes a hopper and a differential pressure level monitoring component as described in any one of claims 1-8, wherein the connection position of the pressure switch (13) and the detection chamber (11) is higher than the highest point of the detection port (21).

10. The material height monitoring bin according to claim 9, characterized in that, The silo includes: The hopper body (22) is used to contain materials; Branch pipe (23) extends obliquely upward along the side wall of the silo. The upper end of the branch pipe (23) is detachably connected to the lower end of the detection chamber (11), and the lower end of the branch pipe (23) is fixed at the detection port (21).

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