A pipeline pressure acquisition device

Abstract

This utility model relates to the field of pipeline inspection technology, and in particular to improving the sealing performance of pressure acquisition devices. A pipeline pressure acquisition device includes a lower housing, a valve, and an upper housing. The valve is disposed between the lower and upper housings, dividing the interior of the housing into a pre-valve chamber and a post-valve chamber, and controlling the flow of air between the two areas. It also includes a sensor protection device mounted on the lower housing. The sensor protection device includes a circuit board, a rubber sleeve, and a potting compound box. Pressure sensors are mounted on both sides of the circuit board. The rubber sleeve is fitted onto the outer surface of the pressure sensors. The circuit board and the pressure sensors with rubber sleeves are assembled together in the potting compound box. The potting compound box is filled with sealing glue to form a cured encapsulation. The pre-valve chamber is connected to the pressure sensor on one side of the circuit board, located on the mounting surface of the potting compound box, and the post-valve chamber is connected to the pressure sensor on the other side of the circuit board.

Description

Technical Field

[0001] This utility model relates to the field of pipeline inspection technology, and in particular to improving the sealing performance of pressure acquisition devices. Background Technology

[0002] In gas pipeline systems, pressure testing is a core component ensuring safe operation. All gas facilities must undergo rigorous pressure testing before being put into use to verify pipeline strength, sealing, and durability. Traditional testing methods often employ hydrostatic or pneumatic testing, injecting a medium into the pipeline and monitoring pressure changes to determine the presence of leaks or structural defects. With advancements in gas safety technology, modern testing systems are increasingly evolving towards intelligence and dynamic capabilities, such as by installing intelligent safety valves to achieve real-time pressure monitoring and automatic shut-off functions.

[0003] However, the practical application of pressure sensors still faces technical bottlenecks. Because the sensors need to directly contact the gas, their protection performance requirements are extremely high, but existing installation methods generally suffer from insufficient protection, difficulties in disassembly and maintenance, or excessive space requirements. For example, Chinese patent CN220685784U discloses a gas pipe pressure testing device that uses an electric slider to drive a support plate, seals the pipe end with a sealing baffle, and injects gas through a high-pressure jet nozzle to work with a pressure sensor to monitor pressure.

[0004] However, the above technical solutions still have significant drawbacks: on the one hand, the testing process relies entirely on the mechanical seal of the physical sealing baffle. If the pipe end face is uneven or the sealing baffle is misaligned, it can easily lead to gas leakage and thus affect the test accuracy. On the other hand, the device can only perform static pressure tests on pipes at fixed positions, which cannot meet the needs of modern gas systems for dynamic pressure monitoring at multiple points in the pipeline. Utility Model Content

[0005] To overcome the shortcomings of the prior art, a pipeline pressure acquisition device is provided.

[0006] This utility model is achieved through the following technical solution: a pipeline pressure acquisition device, including a lower housing, a valve, and an upper housing; the valve is disposed between the lower housing and the upper housing, dividing the interior of the housing into a pre-valve chamber and a post-valve chamber, and controlling the flow of air between the two areas; it also includes a sensor protection device mounted on the lower housing, the sensor protection device including a circuit board, a rubber sleeve, and a potting box: pressure sensors are respectively mounted on both sides of the circuit board; the rubber sleeve is fitted onto the outer surface of the pressure sensors; the circuit board and the pressure sensors with rubber sleeves are assembled together in the potting box; the potting box is filled with sealing glue to form a cured encapsulation; the pre-valve chamber is connected to the pressure sensor on one side of the circuit board, located on the mounting surface of the potting box, and the post-valve chamber is connected to the pressure sensor on the other side of the circuit board.

[0007] To address the issue of air leakage caused by physical sealing barriers, this device innovatively employs an internally integrated protective structure. The sensor protection device fixes the pressure sensor to both sides of the circuit board, then encapsulates it with a rubber sleeve before potting, forming a triple-sealing barrier. The flexible material of the rubber sleeve can adaptively compensate for minor unevenness on the pipe end face. After potting and curing, it forms a gapless, rigid sealing layer, completely replacing the traditional mechanical seal structure. This fundamentally eliminates the risk of air leakage caused by sealing surface deviations, significantly improving testing accuracy and stability.

[0008] To address the issue of insufficient dynamic monitoring capabilities, a dual-chamber independent monitoring mechanism is implemented through valve control. The valve divides the housing into a pre-valve chamber and a post-valve chamber, corresponding to pressure sensors on opposite sides of the circuit board. When the gas pipeline is running, the valve dynamically adjusts the connection between the two chambers and the pipeline: when the valve is open, the pressure in both chambers changes synchronously; when the valve is closed, the two chambers form independent monitoring points. This design allows for the deployment of multiple devices at different locations along the pipeline. By collecting pressure data from the valve's opening and closing states at each node in real time, a dynamic model of the pipeline pressure distribution can be constructed, meeting the requirements for multi-point synchronous monitoring.

[0009] In a preferred embodiment of this utility model, the glue potting box is provided with a positioning groove; the circuit board is fixed to the glue potting box with screws, and the pressure sensor together with the rubber sleeve is embedded in the positioning groove.

[0010] In a preferred embodiment of this utility model, the lower housing is provided with an air inlet connected to the valve air inlet.

[0011] In a preferred embodiment of this utility model, the lower housing is provided with a groove for fixing the glue box, and the groove is provided with a first through hole for connecting the air inlet and the pressure sensor connected to the valve front chamber.

[0012] In a preferred embodiment of this utility model, the first through hole is connected to the second through hole provided on the positioning groove.

[0013] In a preferred embodiment of this utility model, an O-ring for sealing is fitted inside the groove.

[0014] In a preferred embodiment of this utility model, the end face of the rubber sleeve is provided with a porous structure.

[0015] In a preferred embodiment of this utility model, the side wall of the rubber sleeve is provided with a convex structure, and the convex structure is interference-fitted with the positioning groove of the glue box.

[0016] In a preferred embodiment of this utility model, the wire harness interface of the upper housing is provided with a wire plug and a pressure plate. The wire plug is a conical rubber part with a waist-shaped hole for the wire harness to pass through. The rib structure of the pressure plate squeezes the wire plug to achieve radial sealing.

[0017] In a preferred embodiment of this utility model, a sealing gasket is provided between the mating surfaces of the upper shell and the lower shell.

[0018] Compared with the prior art, the present invention has the following beneficial effects: A pipeline pressure acquisition device includes a sensor protection device that achieves dual protection for the pressure sensor by wrapping it with a rubber sleeve and curing it with a potting compound box. This effectively isolates the sensor from external moisture, vibration, and dust, extending its service life.

[0019] Furthermore, the positioning groove and screw fixing design improves the installation accuracy of the circuit board and pressure sensor, avoiding measurement errors caused by assembly deviations.

[0020] Furthermore, the air inlet of the lower housing is directly connected to the valve, optimizing the gas flow path and ensuring that the pressure in the valve pre-chamber responds quickly to changes in pipeline pressure.

[0021] Furthermore, the groove and the first through hole structure enable precise positioning of the glue box and sealed conduction of the pressure channel, preventing gas leakage or pressure loss.

[0022] Furthermore, the design of connecting the second through hole with the first through hole simplifies the gas conduction path and improves the pressure transmission efficiency.

[0023] Furthermore, the O-ring seals the groove gap to prevent external impurities from entering the potting box area, thus improving the overall sealing performance.

[0024] Furthermore, the end face of the rubber sleeve has a porous structure, which helps to distribute gas pressure evenly to the sensor's sensitive element and reduces physical impact, preventing sensor blockage or wear.

[0025] Furthermore, the convex structure and the positioning groove are interference-fitted, which enhances the fixing effect and sealing of the rubber sleeve and prevents loosening during assembly.

[0026] Furthermore, the design of the wire plug and pressure plate ensures a reliable seal at the wire harness interface, preventing moisture or dust from entering the housing along the wire harness.

[0027] Furthermore, the sealing gasket eliminates the tiny gaps at the joint surfaces of the upper and lower housings, ensuring the overall sealing of the housing and preventing internal components from being affected by the environment.

[0028] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a pipeline pressure acquisition device according to the present invention; Figure 2 This is a schematic diagram of the lower shell of this utility model; Figure 3 This is a schematic diagram of the circuit board structure of this utility model; Figure 4 This is a schematic diagram of the structure of the rubber sleeve of this utility model; Figure 5 This is a schematic diagram of the structure of the glue-dispensing box of this utility model; Figure 6 This is a cross-sectional structural diagram of the upper shell of this utility model; The annotations in the attached figures are explained as follows: Lower housing 1, valve 2, upper housing 3, sealing gasket 4, circuit board 5, rubber sleeve 6, potting box 7, O-ring 8, wire plug 9, pressure plate 10, air inlet 101, groove 102, first through hole 103, pressure sensor 501, positioning groove 701, second through hole 7011, convex structure 601, multi-hole structure 602, conical structure 901, waist-shaped hole 902, rib structure 1001. Detailed Implementation

[0030] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0031] In the following description, terms such as “inner,” “outer,” “upper,” “lower,” “left,” and “right” are used only to facilitate the description of the embodiments and simplify the description, and are not intended to 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 this utility model.

[0032] like Figures 1 to 6 As shown, this embodiment discloses a pipeline pressure acquisition device. Its main structure is assembled from a lower housing 1, a valve 2, and an upper housing 3 by bolts, with a sealing gasket 4 sandwiched between the mating surfaces to form an airtight cavity. The valve 2 is vertically disposed in the middle of the housing, dividing the inner cavity into a pre-valve cavity and a post-valve cavity. The airflow between the two cavities is controlled by rotating the valve core. The side wall of the lower housing 1 is provided with an air inlet 101 that connects to an external pipeline. This air inlet 101 is directly threaded into the air inlet channel of the valve 2, ensuring that gas enters the pre-valve cavity quickly.

[0033] The sensor protection device, as a core component, is assembled in a groove 102 at the bottom of the lower housing 1. An O-ring 8 is circumferentially provided in this groove 102 to achieve a radial seal between the potting box 7 and the lower housing 1. The main body of the sensor protection device is the potting box 7, within which a circuit board 5 is fixed by screws. Pressure sensors 501 are symmetrically mounted on both sides of the circuit board 5. Each pressure sensor 501 has a specially designed rubber sleeve 6 tightly fitted onto its outer surface. The end face of the rubber sleeve 6 has a honeycomb porous structure 602, providing physical protection and filtration while ensuring effective gas pressure transmission; its sidewall has a convex structure 601. When assembling the circuit board 5 with the potting box 7, the pressure sensor 501, along with its outer rubber sleeve 6, is embedded into the corresponding positioning groove 701 of the potting box 7. The convex structure 601 on the sidewall of the rubber sleeve 6 forms an interference fit with the positioning groove 701, ensuring both positioning accuracy and a reliable sidewall seal. After the sensor and circuit board are installed, sealing glue is injected into the potting box 7 for curing and encapsulation, providing overall protection for the circuit board 5.

[0034] The gas conduction path is clearly designed: the gas pressure in the pre-valve chamber enters the second through-hole 7011 corresponding to the positioning groove 701 of the potting box 7 through the first through-hole 103 in the middle of the groove 102 of the lower housing 1, and finally reaches the pressure sensor 501 encapsulated in the rubber sleeve 6 near the bottom of the potting box 7. This sensor is used to collect the pressure before the valve. The pressure in the post-valve chamber is transmitted to the pressure sensor 501 on the other side of the circuit board 5 through an independent channel of the upper housing 3. This sensor is used to collect the pressure after the valve. The pressure signals collected by the two sensors are processed by the circuit board 5, and the processed signal harness is led out from the harness interface of the upper housing 3. A wire plug 9 is provided at the outlet. The wire plug 9 is a conical structure 901 made of rubber. After the wire harness passes through the waist-shaped hole 902, the wire plug 9 is squeezed by the rib structure 1001 of the pressure plate 10, causing it to deform radially and tighten the wire harness, thereby achieving a reliable seal of the wire harness interface.

[0035] During assembly, first, place the O-ring 8 into the groove 102 of the lower housing 1. Then, insert the pressure sensor 501, fitted with the rubber sleeve 6, into the positioning groove 701 of the potting box 7. Secure the circuit board 5 with screws, and then inject sealing glue into the potting box 7 for curing and encapsulation. Finally, press the assembled potting box 7 assembly into the groove 102 of the lower housing 1, close the upper housing 3, and tighten the bolts to complete the overall assembly. This structure provides dual protection through the flexible buffering and porous filtration of the rubber sleeve 6 and the rigid encapsulation of the potting box 7. Combined with the interference fit side seal and the radial seal of the O-ring 8, it ensures that the pressure sensor can accurately and stably collect pressure data before and after the valve even in harsh industrial environments such as humidity and vibration.

[0036] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A pipeline pressure acquisition device, comprising a lower housing (1), a valve (2), and an upper housing (3); wherein the valve (2) is disposed between the lower housing (1) and the upper housing (3), dividing the interior of the housing into a pre-valve chamber and a post-valve chamber, and controlling the flow of air between the two chambers; characterized in that, It also includes a sensor protection device mounted on the lower housing (1), the sensor protection device including a circuit board (5), a rubber sleeve (6) and a potting box (7): pressure sensors (501) are mounted on both sides of the circuit board (5); the rubber sleeve (6) is mounted on the outer surface of the pressure sensor (501); the circuit board (5) and the pressure sensor (501) with the rubber sleeve (6) are mounted together in the potting box (7); the potting box (7) is filled with sealing glue to form a cured encapsulation; the valve front chamber is connected to the pressure sensor (501) on one side of the circuit board (5) and located on the mounting surface of the potting box (7), and the valve rear chamber is connected to the pressure sensor (501) on the other side of the circuit board (5).

2. The pipeline pressure acquisition device according to claim 1, characterized in that, The potting box (7) is provided with a positioning groove (701); the circuit board (5) is fixed to the potting box (7) by screws, and the pressure sensor (501) together with the rubber sleeve (6) is embedded in the positioning groove (701).

3. The pipeline pressure acquisition device according to claim 1, characterized in that, The lower housing (1) is provided with an air inlet (101) connected to the air inlet of the valve (2).

4. The pipeline pressure acquisition device according to claim 3, characterized in that, The lower housing (1) is provided with a groove (102) for fixing the glue box. The groove (102) is provided with a first through hole (103). The first through hole (103) is used to connect the air inlet (101) and the pressure sensor (501) connected to the valve front chamber.

5. A pipeline pressure acquisition device according to claim 4, characterized in that, The first through hole (103) is connected to the second through hole (7011) provided on the positioning groove (701).

6. A pipeline pressure acquisition device according to claim 4, characterized in that, An O-ring (8) for sealing is fitted inside the groove (102).

7. The pipeline pressure acquisition device according to claim 1, characterized in that, The end face of the rubber sleeve (6) is provided with a porous structure (602).

8. A pipeline pressure acquisition device according to claim 1 or 7, characterized in that, The sidewall of the rubber sleeve is provided with a convex structure (601), and the convex structure (601) is interference-fitted with the positioning groove (701) of the glue box (7).

9. A pipeline pressure acquisition device according to claim 1, characterized in that, The upper housing (3) has a wire harness interface with a wire plug (9) and a pressure plate (10). The wire plug (9) is a conical rubber part (901). The wire plug (9) has a waist-shaped hole (902) for wire harness to pass through. The rib structure (1001) of the pressure plate (10) squeezes the wire plug (9) to achieve radial sealing.

10. A pipeline pressure acquisition device according to claim 1, characterized in that, A sealing gasket (4) is sandwiched between the mating surfaces of the upper housing (3) and the lower housing (1).

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