A device for detecting liquid pressure

Abstract

The present invention relates to a liquid pressure detection device, comprising a delivery pipeline, a fluctuation elimination mechanism and a pressure detection component, wherein the delivery pipeline is used for the delivery of liquid, the fluctuation elimination mechanism and the pressure detection component are sequentially installed along the delivery direction of the delivery pipeline, and the liquid passes through the fluctuation elimination mechanism and the pressure detection component sequentially to complete the pressure detection; the fluctuation elimination mechanism is used to ensure the stability of the pressure of the liquid during detection, and it comprises an elimination part and a sealing part, the sealing part is installed on the outside of the delivery pipeline to ensure the sealing of the equipment, the elimination part is installed on one side of the sealing part, and connected to the delivery pipeline through the sealing part; the pressure detection component is used to perform pressure detection on the liquid inside the delivery pipeline. The present invention has the characteristics of convenient installation and high pressure stability.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure detection devices, and in particular to a liquid pressure detection device. Background Art

[0002] Pipeline liquid pressure measurement is crucial in medical diagnosis, chemical production, deep-sea pipeline transportation, oil transportation, and other fields; therefore, a pressure gauge is needed to measure the pressure of the pipeline in a timely manner during use.

[0003] When measuring liquid pressure, existing pressure gauges often show pipeline jitter. The reason for the jitter may be the vibration of the water pump and other reasons. Pipeline jitter will cause rapid fluctuations in liquid pressure. When the pressure gauge measures liquid pressure, the indicated value will jitter rapidly, and the pressure value cannot be accurately read. When the remote pressure gauge transmits data to the device that automatically records the pressure curve, the result is as follows: Figure 1 As shown, the curve forms an irregular sawtooth curve, which brings difficulties to subsequent reading and data analysis. Summary of the invention

[0004] In view of the deficiencies in the prior art, an object of the present invention is to provide a liquid pressure detection device which is easy to install and has high pressure detection stability.

[0005] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0006] A liquid pressure detection device comprises a delivery pipeline, a fluctuation elimination mechanism and a pressure detection element.

[0007] The delivery pipeline is used for delivering liquid. The delivery pipeline is sequentially installed with the fluctuation elimination mechanism and the pressure detection member along its delivery direction. The liquid passes through the fluctuation elimination mechanism and the pressure detection member sequentially to complete the pressure detection.

[0008] The fluctuation elimination mechanism is used to ensure the stability of the pressure of the liquid during detection, and includes an elimination part and a sealing part. The sealing part is installed on the outside of the conveying pipeline to ensure the sealing of the equipment. The elimination part is installed on one side of the sealing part and connected to the conveying pipeline through the sealing part.

[0009] The pressure detection member is used to detect the pressure of the liquid inside the delivery pipeline.

[0010] By adopting the above technical solution, when conducting detection, the two ends of the delivery pipeline are connected to the liquid to be tested in the delivery direction, and the liquid will pass through the fluctuation elimination mechanism and the pressure detection component in turn. During the detection process, the elimination part is used to adjust the pressure of the liquid when it flows. In a high-pressure environment, excess liquid enters the inside of the elimination part to maintain the stability of the liquid pressure inside the delivery pipeline. In a low-pressure environment, the liquid inside the elimination part enters the inside of the delivery pipeline to maintain the stability of the pressure of the liquid when it flows inside the delivery pipeline, and the sealing part maintains the sealing of the connection between the elimination part and the delivery pipeline to avoid liquid leakage from the connection, thereby ensuring the detection accuracy of the equipment.

[0011] In a preferred example, the present invention can be further configured as follows: the elimination part includes a pressure bottle and a regulating air bag, and the bottom of the pressure bottle is connected to the delivery pipeline through the sealing part.

[0012] By adopting the above technical solution, the pressure bottle is installed upside down above the conveying pipeline, which can reduce the pressure value of the liquid pressure rushing up when the pressure is high and reduce the pressure value of the liquid pressure rushing down when the pressure is low.

[0013] In a preferred example, the present invention can be further configured as follows: the sealing portion includes a static sealing component and a dynamic sealing component, the static sealing component is installed on the outside of the conveying pipeline, and the dynamic sealing component is installed inside the static sealing component.

[0014] By adopting the above technical solution, the static sealing component is used to connect the conveying pipeline and the elimination part on the one hand, and to maintain the external sealing on the other hand. The dynamic sealing component can alleviate the shaking of the conveying pipeline on the one hand, and can further improve the sealing of the equipment on the other hand.

[0015] In a preferred example, the present invention can be further configured as follows: the static sealing assembly includes a sleeve, a pressure ring and a first sealing ring, the sleeve is sleeved on the outside of the conveying pipe, the sleeve is installed with the pressure ring on one side of the conveying pipe, the first sealing ring is embedded inside the pressure ring, and the dynamic sealing assembly is installed on the side of the pressure ring away from the conveying pipe.

[0016] By adopting the above technical solution, the sleeve is used to fix the wave elimination mechanism on the outside of the conveying pipeline, the pressure ring is used to install and fix the dynamic sealing assembly, and the first sealing ring is used to achieve a static sealing effect to ensure the sealing of the liquid during the flow process.

[0017] In a preferred example, the present invention can be further configured as follows: the dynamic sealing assembly includes a connecting pipe, one end of the connecting pipe passes through the static sealing assembly and is connected to the conveying pipe, and the other end is connected to the elimination part, and a positioning ring is provided on the outer sleeve, a return spring is provided on one side of the positioning ring, and a pusher is connected to the bottom of the return spring, and the pusher abuts against the first sealing ring.

[0018] By adopting the above technical solution, the connecting pipe is used to connect the conveying pipeline with the elimination part, and the pushing member can drive the reset spring to push the positioning ring and the connecting pipe to perform reciprocating motion.

[0019] In a preferred example, the present invention can be further configured as follows: the pushing member includes a pushing ring and a pushing block, the pushing block is embedded in the interior of the pressure ring, and one side of the pushing block is in contact with the pushing ring.

[0020] By adopting the above technical solution, the push block can follow the liquid to drive the push ring to push the reset spring to move in a high-pressure environment, thereby ensuring the stability of liquid flow and maintaining the sealing of the equipment.

[0021] In a preferred example, the present invention can be further configured as follows: a second sealing ring is further provided inside the push block.

[0022] By adopting the above technical solution, the second sealing ring can move up and down with the push block to avoid liquid overflow.

[0023] In a preferred example, the present invention can be further configured as follows: the pressure detection component includes a pressure gauge and a mounting seat, the mounting seat is sleeved on the outside of the delivery pipeline, and one end of the pressure gauge passes through the mounting seat and is connected to the delivery pipeline.

[0024] By adopting the above technical solution, the mounting seat facilitates the installation and fixation of the pressure gauge, which is used to measure and record the pressure caused by the flow of liquid.

[0025] In summary, the present invention includes at least one of the following beneficial technical effects:

[0026] 1. The present invention uses a fluctuation elimination mechanism composed of an elimination part and a sealing part arranged in front of the pressure gauge, which can not only effectively alleviate the pressure of the liquid caused by the vibration of the pipeline during the detection process, but also has high sealing and stability, and is convenient to use;

[0027] 2. The present invention adjusts the pressure inside the delivery pipeline through the air inside the pressure bottle and the regulating airbag, reducing the pressure value of the liquid pressure rising or falling, and the result is more accurate and smooth;

[0028] 3. The present invention seals the connection between the wave part and the conveying pipeline by combining a static sealing component and a dynamic sealing component, which not only has a good sealing effect, but also can alleviate the influence of pipeline vibration on the operation of the wave part and improve the stability of the wave part. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0030] Figure 1 It is a pressure recording curve diagram of a pressure gauge in the prior art.

[0031] Figure 2 Schematic diagram of the overall structure of the liquid pressure detection device in this embodiment.

[0032] Figure 3 Schematic diagram of the cross-sectional structure of the sealing portion in this embodiment.

[0033] Figure 4 Schematic diagram of the high-pressure structure of this embodiment.

[0034] Figure 5 Schematic diagram of the structure of the embodiment in low pressure state.

[0035] Figure 6 It is a pressure record curve diagram of the pressure gauge in this embodiment.

[0036] The reference numerals in the accompanying drawings are:

[0037] 1. Conveying pipeline; 2. Wave elimination mechanism; 21. Elimination part; 211. Pressure bottle; 212. Adjusting airbag; 22. Sealing part; 221. Static sealing assembly; 2211. Sleeve; 2212. Pressure ring; 2213. First sealing ring; 222. Dynamic sealing assembly; 2221. Connecting pipe; 2222. Positioning ring; 2223. Return spring; 2224. Pushing member; 22241. Pushing ring; 22242. Pushing block; 2225. Second sealing ring; 3. Pressure detection member; 31. Pressure gauge; 32. Mounting seat. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0039] Reference Figure 2-Figure 6, is a liquid pressure detection device disclosed in the present invention, comprising a delivery pipeline 1, a fluctuation elimination mechanism 2 and a pressure detection component 3, the delivery pipeline 1 is used for the delivery of liquid, the delivery pipeline 1 is sequentially installed with the fluctuation elimination mechanism 2 and the pressure detection component 3 along its delivery direction, the liquid passes through the fluctuation elimination mechanism 2 and the pressure detection component 3 in sequence to complete the pressure detection; the fluctuation elimination mechanism 2 is used to ensure the stability of the pressure of the liquid during detection, and it comprises an elimination part 21 and a sealing part 22, the sealing part 22 is installed on the outside of the delivery pipeline 1 to ensure the sealing of the equipment, the elimination part 21 is installed on one side of the sealing part 22, and is connected to the delivery pipeline 1 through the sealing part 22; the pressure detection component 3 is used to perform pressure detection on the liquid inside the delivery pipeline 1, in When conducting the test, the two ends of the delivery pipeline 1 are connected to the liquid to be tested in the delivery direction. The liquid will pass through the fluctuation elimination mechanism 2 and the pressure detection component 3 in turn. During the test, the elimination part 21 is used to adjust the pressure of the liquid when it flows. In the high-pressure environment, the excess liquid enters the elimination part 21 to maintain the stability of the liquid pressure inside the delivery pipeline 1. In the low-pressure environment, the liquid inside the elimination part 21 enters the delivery pipeline 1 to maintain the stability of the pressure of the liquid inside the delivery pipeline 1 when it flows, and the sealing part 22 is used to maintain the sealing of the connection between the elimination part 21 and the delivery pipeline 1 to avoid liquid leakage from the connection and ensure the detection accuracy of the equipment.

[0040] The elimination part 21 includes a pressure bottle 211 and an adjusting airbag 212. The bottom of the pressure bottle 211 is connected to the conveying pipeline 1 through the sealing part 22. The pressure bottle 211 is installed upside down above the conveying pipeline 1. It can reduce the pressure value of the liquid pressure when it is high pressure and reduce the pressure value of the liquid pressure when it is low pressure, and adjust the gas pressure inside the pressure bottle 211 by adjusting the airbag 212.

[0041] Reference Figure 3 The sealing part 22 includes a static sealing component 221 and a dynamic sealing component 222. The static sealing component 221 is installed on the outside of the conveying pipeline 1, and the dynamic sealing component 222 is installed inside the static sealing component 221. The static sealing component 221 is used to connect the conveying pipeline 1 and the elimination part 21 on the one hand, and to maintain the external sealing on the other hand. The dynamic sealing component 222 can alleviate the shaking of the conveying pipeline 1 on the one hand, and can further improve the sealing of the equipment on the other hand.

[0042] The static sealing assembly 221 includes a sleeve 2211, a pressure ring 2212 and a first sealing ring 2213. The sleeve 2211 is sleeved on the outside of the conveying pipeline 1. The sleeve 2211 is installed with a pressure ring 2212 on one side of the conveying pipeline 1. The interior of the pressure ring 2212 is inlaid with a first sealing ring 2213. The dynamic sealing assembly 222 is installed on the side of the pressure ring 2212 away from the conveying pipeline 1. The sleeve 2211 is used to fix the wave elimination mechanism 2 on the outside of the conveying pipeline 1. The pressure ring 2212 is used to install and fix the dynamic sealing assembly 222, and plays a static sealing effect through the first sealing ring 2213 to ensure the sealing of the liquid during the flow process.

[0043] The dynamic seal assembly 222 includes a connecting pipe 2221, one end of which passes through the static seal assembly 221 and is connected to the conveying pipeline 1, and the other end is connected to the elimination part 21. A positioning ring 2222 is provided on the outer sleeve of the connecting pipe 2221. A return spring 2223 is provided on one side of the positioning ring 2222. A pusher 2224 is connected to the bottom of the return spring 2223. The pusher 2224 abuts against the sealing ring. The pusher 2224 includes a push ring 22241 and a push block 22242. The push block 22242 is embedded in the inner part of the pressure ring 2212, and one side of the push block 22242 abuts against the push ring 22241. A second sealing ring 2225 is also provided inside the push block 22242. The connecting pipe 2221 is used to connect the delivery pipeline 1 with the elimination part 21. The pushing member 2224 can drive the reset spring 2223 to push the positioning ring 2222 and the connecting pipe 2221 to reciprocate. When the push block 22242 is in a high-pressure environment 2212, it can follow the liquid to drive the push ring 22241 to push the reset spring 2223 to move, thereby ensuring the stability of the liquid flow and maintaining the sealing of the equipment. The second sealing ring 2225 can move up and down with the push block 22242 to avoid liquid overflow.

[0044] The pressure detection component 3 includes a pressure gauge 31 and a mounting seat 32. The mounting seat 32 is sleeved on the outside of the conveying pipeline 1. One end of the pressure gauge 31 passes through the mounting seat 32 and is connected to the conveying pipeline 1. The mounting seat 32 facilitates the installation and fixation of the pressure gauge 31. The pressure gauge 31 is used to measure and record the pressure brought about by the flow of liquid.

[0045] Reference Figure 4 and Figure 5The pressure bottle 211 is installed upside down on the conveying pipeline 1 in front of the pressure gauge 31. When the liquid pressure suddenly increases, the air inside the pressure bottle 211 is compressed, a part of the liquid enters the pressure bottle 211, the floating liquid level rises, the air volume decreases, and at the same time, the lack of a part of the liquid in the conveying pipeline 1 will reduce the pressure of the liquid in the conveying pipeline 1; conversely, when the liquid pressure suddenly decreases, the air inside the pressure bottle 211 expands, a part of the liquid in the pressure bottle 211 flows back into the conveying pipeline 1, the air volume increases, the floating liquid level drops, and the extra liquid in the conveying pipeline 1 will increase the pressure of the liquid in the pipeline.

[0046] In the unfluctuated state, the gas pressure follows the gas state equation:

[0047] pV=RT (1)

[0048] in:

[0049] p—air pressure in the bottle, unit is Pa;

[0050] V—air volume, in m 3 ;

[0051] R—air gas constant, Nm / K;

[0052] T—air temperature, in K.

[0053] When in the pressure surge state, the pressure surges, the floating liquid level rises, and the excess liquid enters the pressure bottle 211, which reduces the pressure of the liquid pressure surge; at the same time, the air volume in the pressure bottle 211 decreases and the pressure increases. Calculation of the reduced pressure surge fluctuation value:

[0054]

[0055] Δp—air pressure in the bottle, the pressure surge fluctuation value eliminated, the unit is Pa;

[0056] ΔV—the reduction value of the air volume in the bottle;

[0057] R—air gas constant, unit is Nm / K;

[0058] T—air temperature, in K.

[0059] Influence of pressure bottle volume:

[0060] Combining formulas (1) and (2), the eliminated pressure surge fluctuation value Δp is calculated:

[0061]

[0062] have to:

[0063]

[0064] It can be seen from formula (3) that the larger the volume of the pressure bottle, the larger V, the larger ΔV, and the smaller Δp, which means that the pressure fluctuation value is smaller, thereby reducing the pressure surge value.

[0065] When in the pressure-lowering state, the pressure is low, the floating liquid level is lowered, the liquid in the pressure bottle 211 enters the delivery pipeline 1, replenishes the liquid in the delivery pipeline 1, and the pressure value of the pressure low is reduced; at the same time, the air volume in the pressure bottle 211 increases and the pressure decreases.

[0066] Calculation of reduced pressure surge fluctuation value: see formula (2).

[0067] Influence of pressure bottle volume: See formula (3).

[0068] From formula (3), we can see that the larger the volume of the pressure bottle, the larger V, the larger ΔV, and the smaller Δp, which means that the pressure fluctuation value is smaller, thereby reducing the pressure surge value. The test results are as follows: Figure 6 shown.

[0069] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid pressure detection device, characterized in that: It comprises a conveying pipeline (1), a fluctuation elimination mechanism (2) and a pressure detection component (3). The delivery pipeline (1) is used for delivering liquid. The delivery pipeline (1) is sequentially equipped with the fluctuation elimination mechanism (2) and the pressure detection component (3) along its delivery direction. The liquid passes through the fluctuation elimination mechanism (2) and the pressure detection component (3) sequentially to complete pressure detection. The fluctuation elimination mechanism (2) is used to ensure the stability of the pressure of the liquid during detection, and comprises an elimination part (21) and a sealing part (22). The sealing part (22) is installed outside the conveying pipeline (1) to ensure the sealing performance of the equipment. The elimination part (21) is installed on one side of the sealing part (22) and is connected to the conveying pipeline (1) through the sealing part (22). The pressure detection element (3) is used to detect the pressure of the liquid inside the delivery pipeline (1); The sealing portion (22) comprises a static sealing component (221) and a dynamic sealing component (222), wherein the static sealing component (221) is installed outside the conveying pipeline (1), and the dynamic sealing component (222) is installed inside the static sealing component (221); The static sealing assembly (221) comprises a sleeve (2211), a pressure ring (2212) and a first sealing ring (2213); the sleeve (2211) is sleeved on the outside of the conveying pipeline (1); the sleeve (2211) is equipped with the pressure ring (2212) on one side of the conveying pipeline (1); the pressure ring (2212) is embedded with the first sealing ring (2213); and the dynamic sealing assembly (222) is installed on the side of the pressure ring (2212) away from the conveying pipeline (1); The dynamic sealing assembly (222) comprises a connecting pipe (2221), one end of which passes through the static sealing assembly (221) and is connected to the conveying pipeline (1), and the other end of which is connected to the eliminating portion (21), and a positioning ring (2222) is provided on the outside of the connecting pipe (2221), a return spring (2223) is provided on one side of the positioning ring (2222), and a pushing member (2224) is connected to the bottom of the return spring (2223), and the pushing member (2224) is in contact with the first sealing ring (2213).

2. A liquid pressure detection device according to claim 1, characterized in that: The elimination part (21) comprises a pressure bottle (211) and a regulating air bag (212), and the bottom of the pressure bottle (211) is connected to the conveying pipeline (1) through the sealing part (22).

3. A liquid pressure detection device according to claim 1, characterized in that: The pushing member (2224) comprises a pushing ring (22241) and a pushing block (22242); the pushing block (22242) is embedded in the interior of the pressing ring (2212); and one side of the pushing block (22242) is in contact with the pushing ring (22241).

4. A liquid pressure detection device according to claim 3, characterized in that: A second sealing ring (2225) is also provided inside the push block (22242).

5. A liquid pressure detection device according to claim 1, characterized in that: The pressure detection component (3) comprises a pressure gauge (31) and a mounting seat (32); the mounting seat (32) is sleeved on the outside of the delivery pipeline (1); one end of the pressure gauge (31) passes through the mounting seat (32) and is connected to the delivery pipeline (1).

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