Pressure sensing device for high-risk product storage tank and working method thereof

Abstract

The present application belongs to the technical field of detection, and particularly relates to a pressure sensing device for high-risk product storage tanks and a working method thereof. The pressure sensing device for high-risk product storage tanks comprises a shell and a sensing elastic element, the shell is internally provided with an exhaust channel, the lower end of the exhaust channel is located in the middle of the detection channel, and the sensing elastic element is adapted to open and close the exhaust channel; an adjusting member is slidably arranged in the connecting pipe and used for opening and closing the detection channel; a linkage member is vertically arranged in the shell and used for driving the sensing elastic element to vertically move and linked with the adjusting member; when the adjusting member horizontally moves to open the detection channel, the linkage member drives the sensing elastic element to move downwards, and the adjusting member passes through the sensing elastic element to wipe the bottom wall of the sensing elastic element; when the adjusting member horizontally moves to close the detection channel, the linkage member drives the sensing elastic element to move upwards, and the residual gas in the detection channel is discharged out of the shell through the exhaust channel.

Description

Technical Field

[0001] This invention belongs to the field of detection technology, specifically relating to the measurement of fluid pressure, and particularly to a pressure sensing device for high-risk material storage tanks and its working method. Background Technology

[0002] Pressure monitoring of hazardous materials storage tanks is a critical aspect of industrial safety, as its core sensor components must withstand harsh environments such as corrosive, flammable, and explosive substances over extended periods. Current technologies typically employ pressure sensors that detect minute deformations of elastic elements (such as metal or ceramic diaphragms) under pressure, converting this deformation into an electrical signal output. However, in the context of hazardous materials storage tanks, even if the sensing elastic element itself is made of corrosion-resistant materials, prolonged exposure to corrosive gas environments can still lead to slow degradation and performance decline, ultimately affecting the accuracy and reliability of pressure monitoring.

[0003] To address the issue of sensing elements being exposed to corrosive media for extended periods, the industry has attempted solutions such as disconnecting the pipeline during non-detection periods, for example, by controlling the flow of the medium through valves. However, such methods have significant limitations: even when the flow is closed, some corrosive gases may remain or adhere to the surface of the sensing element or related cavities. These residual gases cannot be completely removed, continuing to corrode the sensitive elastic element and potentially interfering with subsequent pressure measurements, leading to measurement errors.

[0004] Therefore, how to avoid prolonged contact between the sensing elastic element and corrosive gas is a technical problem that urgently needs to be solved in this field.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute information related to the technology. Summary of the Invention

[0006] This disclosure provides at least one pressure sensing device for high-risk goods storage tanks and its operating method.

[0007] In a first aspect, embodiments of this disclosure provide a pressure sensing device for high-risk goods storage tanks, comprising:

[0008] The shell is fixed to the top of the storage tank and is connected to the storage tank through a connecting pipe;

[0009] The sensing elastic element is raised and lowered within the detection channel inside the housing, and the detection channel is perpendicular to and connected to the connecting pipe.

[0010] An adjusting component, which is horizontally slidably disposed inside the connecting pipe, is used to open or close the passage between the detection channel and the storage tank;

[0011] The linkage component, which is installed inside the housing and linked with the adjusting component, is used to drive the sensing elastic element to move up and down.

[0012] The housing has an exhaust channel, the lower end of which is located in the middle of the detection channel. The sensing elastic element is adapted to open and close the lower opening of the exhaust channel during the lifting and lowering process.

[0013] When the adjusting component moves horizontally to open the detection channel, the linkage component drives the sensing elastic element to move downward to the detection station. The adjusting component passes the bottom of the sensing elastic element and wipes its bottom wall.

[0014] When the adjusting component moves horizontally to close the detection channel, the linkage component drives the sensing elastic element to move upward to the isolation position, and the gas remaining in the detection channel is discharged from the housing through the exhaust channel.

[0015] In one alternative embodiment, the adjusting member includes:

[0016] The piston disc forms a sliding seal with the inner wall of the connecting pipe;

[0017] The connecting rod has one end fixed to the side wall of the piston disc and the other end connected to the drive device;

[0018] The adjusting block is fixed to the lower end of the outer wall of the connecting rod;

[0019] The adjusting block and the linkage are linked together, such that when the connecting rod drives the piston disc and the adjusting block to move outward synchronously, the adjusting block drives the linkage to move downward.

[0020] In one optional embodiment, the connecting rod passes through a through hole provided on the linkage member, and the bottom wall of the adjusting block is provided with an inclined guide slope.

[0021] In one optional implementation, the linkage includes:

[0022] A guide rod is vertically installed inside the housing; an extension bar is vertically installed on the side wall of the guide rod, and the sensing elastic element is fixed to the side wall of the extension bar.

[0023] A return spring, with its two ends fixed to the guide rod and the inner wall of the housing respectively, is adapted to pull the guide rod to move vertically upward.

[0024] In one alternative embodiment, the inner diameter of the through hole at the lower end of the guide rod is larger than the diameter of the connecting rod, so as to provide a clearance for the through movement of the connecting rod.

[0025] In one alternative embodiment, the exhaust duct is inclined, and its outlet is connected to the collection chamber via a pipe.

[0026] In one alternative embodiment, the sensing elastic element is a diaphragm of a piezoresistive pressure sensor or a capacitive pressure sensor.

[0027] In one alternative embodiment, the drive device is a linear motor, a cylinder, or a manual lever, which is fixed to the outside of the housing.

[0028] In one alternative embodiment, a sealing ring is embedded on the outer edge of the piston disc to ensure a sliding seal between it and the inner wall of the connecting pipe.

[0029] Secondly, embodiments of this disclosure also provide a method for operating a pressure sensing device, the method comprising:

[0030] When the adjusting component moves horizontally to open the detection channel, the linkage component drives the sensing elastic element to move downward to the detection station. The adjusting component passes the bottom of the sensing elastic element and wipes its bottom wall.

[0031] When the adjusting component moves horizontally to close the detection channel, the linkage component drives the sensing elastic element to move upward to the isolation position, and the gas remaining in the detection channel is discharged from the housing through the exhaust channel.

[0032] The beneficial effects of this invention are that it provides a pressure sensing device for high-risk material storage tanks. Through the ingenious coordinated design of the adjusting components, linkage components, and exhaust channels, the sensing elastic element is exposed to the corrosive medium inside the storage tank only for a brief period during pressure detection. During non-detection periods, the sensing elastic element is raised to an isolation position and isolated from the main passage, while residual gas is actively discharged. This fundamentally avoids long-term contact with corrosive gases, effectively solving the problem of component deterioration and performance degradation caused by medium corrosion, and significantly extending the sensor's service life.

[0033] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 A perspective view of a pressure sensing device for a high-risk goods storage tank provided in an embodiment of this disclosure;

[0037] Figure 2 An axial sectional perspective view of the housing provided in an embodiment of this disclosure;

[0038] Figure 3 A perspective view of the sealing detection channel state of the adjustment component provided in the embodiments of this disclosure.

[0039] In the picture:

[0040] 1. Storage tank; 2. Shell; 20. Detection channel; 21. Exhaust duct; 3. Sensing elastic element; 4. Connecting pipe;

[0041] 5. Adjusting component; 51. Piston disc; 52. Connecting rod; 53. Adjusting block; 54. Inclined surface;

[0042] 6. Linkage component; 61. Guide rod; 62. Extension strip; 63. Through hole. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0045] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify an entire column of elements when following a column of elements. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0046] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0047] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0048] Research has shown that pressure sensors typically operate by sensing the minute deformations of elastic elements (such as metal or ceramic diaphragms) under pressure and converting these deformations into electrical signals. However, in applications involving high-risk storage tanks, even if the sensing elastic element itself is made of corrosion-resistant material, prolonged exposure to corrosive gas environments can still lead to slow degradation and performance decline, ultimately affecting the accuracy and reliability of pressure monitoring.

[0049] To address the issue of sensing elements being exposed to corrosive media for extended periods, the industry has attempted solutions such as disconnecting the pipeline during non-detection periods, for example, by controlling the flow of the medium through valves. However, such methods have significant limitations: even when the flow is closed, some corrosive gases may remain or adhere to the surface of the sensing element or related cavities. These residual gases cannot be completely removed, continuing to corrode the sensitive elastic element and potentially interfering with subsequent pressure measurements, leading to measurement errors.

[0050] Therefore, how to avoid prolonged contact between the sensing elastic element and corrosive gas is a technical problem that urgently needs to be solved in this field.

[0051] The defects in the above solutions and the reasons for their occurrence are the results of the inventors' practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventors' contributions to this disclosure.

[0052] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0053] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0054] like Figure 1 and Figure 2 As shown, at least one embodiment provides a pressure sensing device for a hazardous materials storage tank 1, including: a housing 2, a sensing elastic element 3, an adjusting element 5, and a linkage element 6. The housing 2 is fixedly installed on the top of the hazardous materials storage tank 1 via a flange or other connection method. A vertical detection channel 20 is machined inside the housing 2, and an exhaust channel 21 that communicates with the middle of the detection channel 20 and extends obliquely upward. The outlet of the exhaust channel 21 is connected to a dedicated hazardous gas collection chamber (not shown in the figure) via a pipe. The sidewall of the housing 2 communicates with the interior of the storage tank 1 via a connecting pipe 4, and the axis of the connecting pipe 4 is perpendicular to the axis of the detection channel 20.

[0055] Reference Appendix Figure 2 In this embodiment, the sensing elastic element 3 is preferably a diaphragm of a piezoresistive pressure sensor, which is fixedly mounted on the extension bar 62 of the linkage 6. The sensing elastic element 3 can move up and down with the linkage 6 within the detection channel 20, and it has its own signal line (not shown in the figure) to transmit the detected pressure signal to an external processing system. At the same time, the sensing elastic element 3 can open or close the air inlet of the exhaust passage 21 when it moves up and down. The adjusting member 5 is slidably disposed inside the connecting pipe 4. It consists of a piston disc 51, a connecting rod 52, and an adjusting block 53. A corrosion-resistant sealing ring is embedded on the outer edge of the piston disc 51, so that it forms a sliding seal with the inner wall of the connecting pipe 4. One end of the connecting rod 52 is fixed to the piston disc 51, and the other end extends to the outside of the housing 2 and is connected to the piston rod of a cylinder (as a driving device). The adjusting block 53 is fixed to the lower end of the connecting rod 52, and its bottom is machined with an inclined guide slope 54. The adjusting block 53 is used to push the linkage 6 vertically downward through the inclined surface 54.

[0056] Continue to refer to the appendix Figure 2The linkage 6 includes a guide rod 61, an extension bar 62, and a return spring (not shown in the figure). The guide rod 61 is vertically mounted inside the housing 2 via a linear bearing and can slide vertically. A through hole 63 is provided at the lower end of the guide rod 61, with an inner diameter slightly larger than the diameter of the connecting rod 52. The extension bar 62 is horizontally fixed to one side of the guide rod 61 for mounting the sensing elastic element 3. The return spring is sleeved on the guide rod 61, with its upper and lower ends abutting against the shoulder of the guide rod 61 and the inner wall of the housing 2, respectively, providing a continuous upward elastic force to the guide rod 61.

[0057] The working principle of the pressure sensing device for high-risk goods storage tank 1 is as follows:

[0058] like Figure 3 As shown, in the isolation and exhaust state (non-detection state): Driven by the cylinder, the adjusting component 5 is in the inward retracted position, and the piston disc 51 seals the connecting pipe 4, cutting off the passage between the storage tank 1 and the detection channel 20. At this time, under the action of the return spring, the guide rod 61 is pulled to the highest point, and the sensing elastic element 3 is in the "isolation position". At this time, the space at the bottom of the detection channel 20 is connected to the collection chamber through the exhaust duct 21, so even if there are trace amounts of residual corrosive gases, they will be safely discharged. Figure 3 F2 in the figure represents the horizontal movement direction when the connecting rod 52 and the piston disc 51 open the detection channel 20.

[0059] like Figure 2 As shown, in the pressure detection state: when pressure detection is required, the cylinder actuates, pushing the adjusting component 5 to move horizontally outward. Initially, as the piston disc 51 moves outward, the guide ramp 54 at the front of the adjusting block 53 first contacts and presses down on the guide rod 61 of the linkage 6, overcoming the force of the return spring and driving the entire linkage 6, along with the sensing elastic element 3, to move downward. During this process, the connecting rod 52 passes through the through hole 63. When the piston disc 51 completely passes under the sensing elastic element 3, its outer wall will wipe the bottom wall of the sensing elastic element 3, removing any adhering substances. Furthermore, the bottom wall of the sensing elastic element 3 has an arc shape that matches the outer wall of the piston disc 51; when the outer wall of the piston disc 51 passes the bottom wall of the sensing elastic element 3, it can effectively scrape away any adhering substances. Subsequently, the sensing elastic element 3 reaches the "detection station". Figure 2 F1 in the figure indicates the horizontal movement direction when the connecting rod 52 and the piston disc 51 close the detection channel 20.

[0060] Pressure Measurement: As the adjusting element 5 continues to move outward, the piston disc 51 opens the channel of the connecting pipe 4, and the pressure medium in the storage tank 1 quickly fills the detection channel 20, acting on the sensing elastic element 3 for precise pressure measurement. Return to Isolation State: After the detection is completed, the cylinder reverses its direction, pulling the adjusting element 5 inward horizontally. Isolation: The piston disc 51 reseals the connecting pipe 4, cutting off the pressure medium source.

[0061] Lifting and Exhausting: As the adjusting component 5 moves inward, the linkage 6 begins to move upward under the action of the return spring, causing the sensing elastic element 3 to leave the detection station and return upward. The upward movement of the sensing elastic element 3 is equivalent to forming a gradually increasing space in the lower part of the detection channel 20, generating a piston pump-like suction effect, which quickly discharges most of the corrosive gases that remain around it during the detection process to the collection chamber through the inclined exhaust channel 21. Finally, the sensing elastic element 3 returns to the isolation station, completing one working cycle.

[0062] In this embodiment, the driving device can be a stepper motor or a servo motor in conjunction with a lead screw and nut mechanism to achieve more precise control over the movement position of the adjusting element 5. The sensing elastic element 3 can also be a diaphragm of a capacitive pressure sensor.

[0063] At least one embodiment provides a method of operating a pressure sensing device, the method comprising:

[0064] When the adjusting member 5 moves horizontally to open the detection channel 20, the linkage member 6 drives the sensing elastic element 3 to move downward to the detection station. The adjusting member 5 passes the bottom of the sensing elastic element 3 and wipes its bottom wall. When the adjusting member 5 moves horizontally to close the detection channel 20, the linkage member 6 drives the sensing elastic element 3 to move upward to the isolation station. The gas remaining in the detection channel 20 is discharged from the housing 2 through the exhaust channel 21.

[0065] In summary, this invention, through its ingenious mechanical linkage design, achieves dynamic protection, automatic cleaning, and residual gas removal for sensitive components, effectively overcoming the shortcomings of existing technologies.

[0066] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0067] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as a second element, component, region, layer, or segment.

[0068] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A pressure sensing device for a high-risk goods storage tank, characterized in that, include: The shell (2) is fixed to the top of the storage tank (1) and is connected to the storage tank (1) through the connecting pipe (4); The sensing elastic element (3) is raised and lowered within the detection channel (20) inside the housing (2), and the detection channel (20) is perpendicular to and connected to the connecting pipe (4); Adjustment component (5), which is horizontally slidably disposed in the connecting pipe (4), is used to open and close the passage between the detection channel (20) and the storage tank (1); The linkage component (6) is installed inside the housing (2) and is linked with the adjusting component (5) to drive the sensing elastic element (3) to rise and fall. The housing (2) has an exhaust channel (21) inside, the lower end of which is located in the middle of the detection channel (20). The sensing elastic element (3) is adapted to open and close the lower opening of the exhaust channel (21) during the lifting and lowering process. When the adjusting member (5) moves horizontally to open the detection channel (20), the linkage member (6) drives the sensing elastic element (3) to move downward to the detection station. When the adjusting member (5) passes the bottom of the sensing elastic element (3), the outer wall contour of the adjusting member (5) can contact the bottom wall of the sensing elastic element (3) and remove the attached substances. When the adjusting member (5) moves horizontally to close the detection channel (20), the linkage member (6) drives the sensing elastic element (3) to move upward to the isolation station, and the gas remaining in the detection channel (20) is discharged from the housing (2) through the exhaust channel (21). The adjusting element (5) includes: Piston disc (51) forms a sliding seal with the inner wall of connecting pipe (4); The connecting rod (52) has one end fixed to the side wall of the piston disc (51) and the other end connected to the drive device; Adjusting block (53), which is fixed to the lower end of the outer wall of connecting rod (52); The adjusting block (53) is linked with the linkage (6) so that when the connecting rod (52) drives the piston disc (51) and the adjusting block (53) to move outward synchronously, the adjusting block (53) drives the linkage (6) to move downward. The connecting rod (52) passes through the through hole (63) provided on the linkage (6), and the bottom wall of the adjusting block (53) is provided with an inclined guide slope (54). The linkage (6) includes: The guide rod (61) is vertically installed inside the housing (2); the extension bar (62) is vertically installed on the side wall of the guide rod (61), and the sensing elastic element (3) is fixed to the side wall of the extension bar (62); The return spring has its two ends fixed to the guide rod (61) and the inner wall of the housing (2) respectively. The return spring is adapted to pull the guide rod (61) to move vertically upward.

2. The pressure sensing device for high-risk goods storage tanks as described in claim 1, characterized in that, The inner diameter of the through hole (63) at the lower end of the guide rod (61) is larger than the diameter of the connecting rod (52) to provide a clearance for the through movement of the connecting rod (52).

3. The pressure sensing device for high-risk goods storage tanks as described in claim 1, characterized in that, The exhaust duct (21) is inclined, and its outlet end is connected to the collection chamber through a pipeline.

4. The pressure sensing device for high-risk goods storage tanks as described in claim 1, characterized in that, The sensing elastic element (3) is a diaphragm of a piezoresistive pressure sensor or a capacitive pressure sensor.

5. The pressure sensing device for high-risk goods storage tanks as described in claim 1, characterized in that, The driving device is a linear motor, cylinder or manual operating lever, which is fixed to the outside of the housing (2).

6. The pressure sensing device for high-risk goods storage tanks as described in claim 1, characterized in that, The outer edge of the piston disc (51) is fitted with a sealing ring to ensure the sliding sealing performance between it and the inner wall of the connecting pipe (4).

7. A method for operating a pressure sensing device, characterized in that, The working method of the pressure sensing device for high-risk material storage tanks as described in any one of claims 1-6 includes: When the adjusting component (5) moves horizontally to open the detection channel (20), the linkage component (6) drives the sensing elastic element (3) to move downward to the detection station, and the adjusting component (5) passes the bottom of the sensing elastic element (3) and wipes its bottom wall. When the adjusting member (5) moves horizontally to close the detection channel (20), the linkage member (6) drives the sensing elastic element (3) to move upward to the isolation station, and the gas remaining in the detection channel (20) is discharged from the housing (2) through the exhaust channel (21).

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