Pipeline fluid differential pressure sensor

Abstract

A pipeline fluid differential pressure sensor belongs to the technical field of differential pressure sensors and comprises a shell, a differential pressure sensor body is fixedly mounted on the upper surface of the shell, a sensing head of the differential pressure sensor body is mounted in the shell in an inserted manner, a sealing plug A and a sealing plug B are fixedly mounted in the shell, the sensing head penetrates through the sealing plug A, and the sealing plug B is connected with the sealing plug A in an inserted manner. A hollow flushing pipe is slidably installed on the lower surface of the shell in a penetrating mode, a sealing plug is installed on the lower surface of the hollow flushing pipe in a threaded connection mode, the hollow flushing pipe penetrates through the sealing plug B and is located under the sensing head, and a locking mechanism is installed between the bottom end of the hollow flushing pipe and the bottom end of the shell. According to the sensing head cleaning device, the whole sensing head cleaning operation can be completed at the original position, dismounting operation is not needed, the interruption condition of the production process can be effectively avoided, and it can be guaranteed that operation is easy, convenient, rapid and efficient.

Description

Technical Field

[0001] The utility model belongs to the technical field of differential pressure sensors, and in particular relates to a pipeline fluid differential pressure sensor. Background Art

[0002] Differential pressure sensors play a crucial role in modern industrial pipeline fluid transportation systems. They accurately measure fluid pressure differences at different locations within the pipeline, providing crucial insights for flow control, system monitoring, and fault diagnosis. However, existing pipeline fluid differential pressure sensors suffer from numerous technical drawbacks.

[0003] During actual operation, the fluid in the pipeline often carries various impurities, dirt particles, and other substances. Over time, this dirt gradually settles and adheres to the sensing head of the differential pressure sensor. Since the sensing head is the core component of differential pressure measurement, the accumulation of dirt can seriously affect its measurement accuracy and sensitivity.

[0004] Currently, the conventional method for cleaning the sensing head of a differential pressure sensor is to dismantle it for cleaning. This operation requires suspending the associated piping system, resulting in interrupted production processes, reduced productivity, and potential financial losses. Furthermore, dismantling is complex, labor-intensive, and time-consuming. Therefore, a pipeline fluid differential pressure sensor has been developed to address these technical issues. Utility Model Content

[0005] With respect to the differential pressure sensor in the prior art, when cleaning the dirt from the internal sensing head, it is necessary to disassemble it for cleaning, which results in production interruptions, affects production efficiency, and is cumbersome to operate. The present invention provides a pipeline fluid differential pressure sensor, which can use a locking mechanism to tightly lock the hollow flushing tube and the shell, so that the top of the hollow flushing tube can fit tightly against the lower surface of the sealing plug A, thereby effectively isolating the sensing head of the differential pressure sensor body from the inner cavity of the shell. Subsequently, by unscrewing the sealing plug, water can be injected into the outer injection cavity of the hollow flushing tube, allowing the water to be ejected from the spray hole, thereby achieving the purpose of flushing the sensing head. The entire cleaning operation of the sensing head is completed in the original position without the need for disassembly operation, which can effectively avoid interruptions in the production process and ensure simple, quick and efficient operation. It effectively solves the problem that the differential pressure sensor in the prior art needs to be disassembled for cleaning when cleaning the dirt from the internal sensing head, which results in production interruptions, affects production efficiency, and is cumbersome to operate. Its specific technical solution is as follows:

[0006] A pipeline fluid differential pressure sensor includes a shell, the upper surface of which is fixedly mounted a differential pressure sensor body, the sensing head of the differential pressure sensor body is plugged into and mounted in the shell, a sealing plug A and a sealing plug B are fixedly mounted in the shell, the sensing head passes through the sealing plug A, a hollow flushing pipe is slidably mounted through the lower surface of the shell, a sealing plug is threadedly mounted on the lower surface of the hollow flushing pipe, the hollow flushing pipe passes through the sealing plug B, and the hollow flushing pipe is located directly below the sensing head, and a locking mechanism is installed between the bottom end of the hollow flushing pipe and the bottom end of the shell.

[0007] In the above technical solution, an external injection cavity is provided inside the hollow flushing tube, a plurality of spray holes are opened through the external injection cavity, the external injection cavity is connected to a delivery pipe, a valved drain joint is fixedly installed on the front surface of the shell, and the end of the delivery pipe away from the external injection cavity is threadedly connected to the valved drain joint.

[0008] In the above technical solution, the hollow flushing tube is T-shaped.

[0009] In the above technical solution, a fixing ring is fixedly installed on the outer surface of the shell, and a card slot is opened symmetrically on the upper surface of the fixing ring. The locking mechanism includes two U-shaped adapter blocks, and the two U-shaped adapter blocks are symmetrically fixed on the outer surface of the hollow flushing pipe, and a T-shaped rod is rotatably installed in each U-shaped adapter block, and the T-shaped rod is clamped in the corresponding card slot.

[0010] In the above technical solution, a limiting ring is fixedly installed in the shell, the upper surface of the sealing plug B is in contact with the lower surface of the limiting ring, and the hollow flushing pipe passes through the limiting ring.

[0011] In the above technical solution, a filter screen is fixedly installed on one end of the delivery pipe away from the outer injection cavity.

[0012] Compared with the prior art, the present invention provides a pipeline fluid differential pressure sensor with the following beneficial effects:

[0013] The utility model can complete the entire cleaning operation of the sensing head in the original position without the need for disassembly operation, which can effectively avoid interruptions in the production process and ensure simple, quick and efficient operation. It effectively solves the problem that the pressure differential sensor in the prior art needs to be disassembled and cleaned when cleaning the internal sensing head, resulting in production interruptions, affecting production efficiency and cumbersome operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the present utility model.

[0015] Figure 2 It is a rear view structural schematic diagram of the present utility model.

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the hollow flushing pipe of the present invention.

[0018] Figure 5 for Figure 3 Schematic diagram of the local structure at point a.

[0019] Figure 6 for Figure 3 Schematic diagram of the local structure at point b.

[0020] Figure 7 This is a schematic diagram of the shell structure of the present utility model.

[0021] Figure 1-Figure 7 Among them: 1. Shell; 11. Sealing plug A; 12. Limiting ring; 13. Sealing plug B; 14. Fixing ring; 141. Card groove; 15. Drain connector with valve; 2. Differential pressure sensor body; 21. Sensing head; 3. Hollow flushing pipe; 31. External injection cavity; 311. Spray hole; 32. Sealing plug; 4. Locking mechanism; 41. U-shaped adapter block; 42. T-bar; 5. Delivery pipe; 51. Filter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In this embodiment, front, back, left, right, up and down are represented by Figure 1 Describes the datum. Figure 1-Figure 7 , the utility model provides a technical solution:

[0024] A pipeline fluid differential pressure sensor includes a housing 1, a differential pressure sensor body 2 fixedly mounted on the upper surface of the housing 1, a sensing head 21 of the differential pressure sensor body 2 plugged into the housing 1, a sealing plug A11 and a sealing plug B13 fixedly mounted in the housing 1, the sensing head 21 passing through the sealing plug A11, a hollow flushing pipe 3 slidingly mounted passing through the lower surface of the housing 1, a sealing plug 32 threadedly mounted on the lower surface of the hollow flushing pipe 3, the hollow flushing pipe 3 passing through the sealing plug B13, the sealing plug B13 being used to seal the sliding gap between the hollow flushing pipe 3 and the housing 1, the sealing plug B13 being made of nitrile rubber, which is tolerant to a variety of fluid media and has good elastic recovery ability. When the hollow flushing pipe 3 slides, the sealing plug B13 made of nitrile rubber can be squeezed and deformed, fitting tightly against the outer surface of the flushing pipe, thereby preventing fluid from leaking from the gap, and the hollow flushing pipe 3 is located directly below the sensing head 21, and a locking mechanism 4 is installed between the bottom end of the hollow flushing pipe 3 and the bottom end of the housing 1;

[0025] It should be noted that an external injection cavity 31 is provided inside the hollow flushing tube 3, and a plurality of spray holes 311 are formed through the external injection cavity 31. The external injection cavity 31 is connected to the delivery pipe 5. A valved drain connector 15 is fixedly mounted on the front surface of the housing 1. If the pipeline detected by the differential pressure sensor body 2 is a pipeline used to transport pure liquid, the end of the delivery pipe 5 away from the external injection cavity 31 is screwed to the valved drain connector 15.

[0026] When cleaning the sensing head 21 during use after installing it in the liquid delivery pipeline, first push the hollow flushing tube 3 upward so that its upper surface is in contact with the lower surface of the sealing plug A11, isolating the sensing head 21 and the hollow flushing tube 3 from the inner cavity of the shell 1. Then, use the locking mechanism 4 to fix the position of the hollow flushing tube 3. Then, remove the sealing plug 32 and open the valve of the valved drain joint 15. Only then, under the action of the pressure difference, the liquid in the liquid delivery pipeline will enter the outer injection cavity 31 through the delivery pipe 5 and be sprayed out from the spray hole 311, flushing and cleaning the sensing head 21, and the cleaned dirt will be discharged from the hollow position of the hollow flushing tube 3. After cleaning, close the valve of the valved drain joint 15, and re-screw the sealing plug 32 to the bottom of the hollow flushing tube 3, move the hollow flushing tube 3 downward, so that the sensing head 21 is exposed to the shell 1 again for detection.

[0027] During use, if the pipeline detected by the differential pressure sensor body 2 is a pipeline for conveying gas, an external plug is screwed to the end of the conveying pipe 5 away from the external injection cavity 31 in advance to prevent gas leakage.

[0028] When cleaning the sensing head 21 during use after being installed in the gas delivery pipeline, first push the hollow flushing tube 3 upward so that its upper surface is in contact with the lower surface of the sealing plug A11, and isolate the sensing head 21 and the hollow flushing tube 3 from the inner cavity of the shell 1. Then, use the locking mechanism 4 to fix the position of the hollow flushing tube 3. Subsequently, remove the sealing plug 32, and remove the external plug of the delivery pipe 5 to connect the external high-pressure water injection equipment. Use the external high-pressure water injection equipment to inject high-pressure water into the external injection cavity 31 of the hollow flushing tube 3. Water is sprayed from the spray hole 311 to the sensing head 21 for flushing and cleaning. The cleaned dirt is discharged from the hollow position of the hollow flushing tube 3. After cleaning, use the sealing plug 32 to seal the hollow position of the hollow flushing tube 3, and use the external plug to seal one end of the delivery pipe 5 away from the hollow flushing tube 3. Release the fixation of the locking mechanism 4, move the hollow flushing tube 3 downward, and expose the sensing head 21 to the shell 1 again for detection.

[0029] Whether installed in a gas pipeline or used in a liquid pipeline, compared with the existing technology, the utility model can complete the entire cleaning operation of the sensor head 21 in the original position without the need for disassembly operation, which can effectively avoid interruptions in the production process and ensure simple, fast and efficient operation.

[0030] When the hollow flushing pipe 3 moves downward, in order to limit its sliding stroke and prevent it from excessively sliding off the shell 1, the hollow flushing pipe 3 needs to be set into a T shape.

[0031] Combine Figure 7 and Figure 5 As shown, a fixing ring 14 is fixedly installed on the outer surface of the housing 1, and a card slot 141 is opened symmetrically on the upper surface of the fixing ring 14. The locking mechanism 4 includes two U-shaped adapter blocks 41, which are fixedly installed on the outer surface of the hollow flushing pipe 3 in a symmetrical manner. A T-shaped rod 42 is rotatably installed in each of the U-shaped adapter blocks 41, and the T-shaped rod 42 is snap-fitted into the corresponding card slot 141.

[0032] When the top of the hollow flushing tube 3 is fitted with the sealing plug A11, the T-rod 42 is flipped upward to clamp it in the corresponding slot 141. The hollow flushing tube 3 can be suspended and fixed by utilizing the cooperation between the T-rod 42 and the fixing ring 14 to ensure that the inner cavity of the shell 1 and the inner cavity of the hollow flushing tube 3 are isolated from each other.

[0033] Specifically, if Figure 5 As shown, a limiting ring 12 is fixedly installed in the shell 1, the upper surface of the sealing plug B13 is in contact with the lower surface of the limiting ring 12, and the hollow flushing pipe 3 passes through the limiting ring 12. By installing the limiting ring 12, the sealing plug B13 will not move as the hollow flushing pipe 3 moves up and down, thereby ensuring the sealing effect.

[0034] In order to effectively filter the impurities in the flushing liquid and ensure good cleaning effect, a filter screen 51 is fixedly installed at the end of the delivery pipe 5 away from the outer injection cavity 31. The filter screen 51 can filter part of the impurities in the flushing liquid, and then the induction head 21 is flushed with the filtered clean water.

Claims

1. A pipeline fluid differential pressure sensor, comprising a housing (1), a differential pressure sensor body (2) fixedly mounted on the upper surface of the housing (1), a sensing head (21) of the differential pressure sensor body (2) plugged into and mounted in the housing (1), characterized in that: A sealing plug A (11) and a sealing plug B (13) are fixedly installed in the shell (1), the sensing head (21) passes through the sealing plug A (11), a hollow flushing pipe (3) is slidably installed through the lower surface of the shell (1), a sealing plug (32) is screwed on the lower surface of the hollow flushing pipe (3), the hollow flushing pipe (3) passes through the sealing plug B (13), and the hollow flushing pipe (3) is located directly below the sensing head (21), and a locking mechanism (4) is installed between the bottom end of the hollow flushing pipe (3) and the bottom end of the shell (1).

2. A pipeline fluid pressure differential sensor according to claim 1, characterized in that: An external injection cavity (31) is provided inside the hollow flushing tube (3), and a plurality of spray holes (311) are provided through the external injection cavity (31). The external injection cavity (31) is connected to a delivery pipe (5), and a valved drainage joint (15) is fixedly mounted on the front surface of the shell (1). The end of the delivery pipe (5) away from the external injection cavity (31) is screwed to the valved drainage joint (15).

3. A pipeline fluid pressure differential sensor according to claim 2, characterized in that: The hollow flushing tube (3) is T-shaped.

4. The pipeline fluid pressure differential sensor according to claim 1, characterized in that: A fixing ring (14) is fixedly mounted on the outer surface of the housing (1), and a clamping groove (141) is symmetrically opened on the upper surface of the fixing ring (14). The locking mechanism (4) comprises two U-shaped adapter blocks (41), which are symmetrically fixedly mounted on the outer surface of the hollow flushing pipe (3). A T-shaped rod (42) is rotatably mounted in each of the U-shaped adapter blocks (41), and the T-shaped rod (42) is clamped and mounted in the corresponding clamping groove (141).

5. The pipeline fluid differential pressure sensor according to claim 1, characterized in that: A limiting ring (12) is fixedly installed in the housing (1), the upper surface of the sealing plug B (13) is in contact with the lower surface of the limiting ring (12), and the hollow flushing pipe (3) passes through the limiting ring (12).

6. The pipeline fluid pressure differential sensor according to claim 2, characterized in that: A filter screen (51) is fixedly mounted on one end of the delivery pipe (5) away from the outer injection cavity (31).

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