Pipeline pressure measuring and sampling device

Abstract

The invention relates to a pipeline pressure measuring and sampling device which comprises a connecting ring communicated with a pipeline. The instillation tube penetrates through the ring wall of the connecting ring in the radial direction of the connecting ring, and the two ends of the instillation tube protrude out of the outer ring wall of the connecting ring; a sampling hole is formed in the circumferential wall of the instillation tube in the inner ring wall of the connecting ring and is used for transferring a sample in a pipeline to the two ends of the instillation tube. The device is provided with the instillation tube penetrating through the ring wall of the connecting ring, the sampling hole is formed in the instillation tube, so that a sampled sample has representativeness, pressure measurement and sampling are conducted at the two ends of the instillation tube respectively, and pressure measurement and sampling do not affect each other; due to the fact that a sampling channel does not need to be formed in the ring wall of the connecting ring, the thickness of the ring wall of the connecting ring is small, the device can be directly connected with a flange on a pipeline through the axial connecting hole in the connecting ring, and the device is small in size and easy to install on the pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of pipelines, and particularly to a pipeline pressure measurement and sampling device. Background Art

[0002] Pipeline transportation is the main form of oil and gas transportation in China. Pipeline transportation has high transmission efficiency, good sealing performance, and reduces the use of transportation tools. However, due to the continuity and long-distance transportation of pipelines, there are practical requirements for maintaining the pressure in the pipeline and monitoring the quality of oil products in sections. When fluids are transported in pipelines, pressure gauges are needed to monitor the pressure of the fluids in the pipelines in real time. At the same time, it is also required to collect a part of the fluid samples in the pipelines and detect their various indicators.

[0003] A Chinese utility model patent with an application number of 202320302318.X (publication number CN219475095U) discloses a fluid pipeline sampling structure, which includes an annular cavity. A first sampling channel passing through the cavity wall of the annular cavity is provided on the annular cavity; at least one transition sampling channel is provided on the side of the first sampling channel, and the transition sampling channel is connected to the first sampling channel; a middle sampling channel is connected in the middle of the transition sampling channel. In this application, all the fluid sampling parts are concentrated. Some parts can play a sampling role, and some parts can play a monitoring role.

[0004] However, the fluid pipeline sampling structure has the following deficiencies: First, the samples obtained from the sampling channels come from the pipeline edge, and the material medium components at the pipeline edge are not typical; Second, multiple interconnected sampling channels are provided in the cavity wall, which greatly increases the thickness of the cavity wall and affects the functions of other sampling channels when one channel is blocked; Finally, the fluid pipeline sampling structure needs to be externally connected with extended pipelines and flanges to be connected to external pipelines, which not only increases the structure volume but also requires multiple connections during installation. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a pipeline pressure measurement and sampling device according to the current situation of the prior art. The samples obtained by this device are typical, the functions of each sampling channel do not affect each other, and it is convenient to connect to external pipelines.

[0006] The technical solution adopted by the present invention to solve the above technical problem is as follows: The pipeline pressure measurement and sampling device includes a connecting ring, and the connecting ring is communicated with the pipeline. It is characterized in that it further includes

[0007] a drip tube, the drip tube penetrates through the ring wall of the connecting ring along the radial direction of the connecting ring, and both ends of the drip tube protrude from the outer ring wall of the connecting ring; sampling holes are provided on the peripheral wall of the drip tube located inside the inner ring wall of the connecting ring for transferring the samples in the pipeline to both ends of the drip tube.

[0008] Further, connection holes for connecting with the pipeline are formed in the connection ring. The inner diameter of the connection ring is equal to the inner diameter of the pipeline, and the connection holes are connected to the flanges on the pipeline.

[0009] Further, an annular protrusion extends from the outer ring wall of the connection ring, and the inner diameter of the annular protrusion is equal to the outer diameter of the flange at the pipeline connection; an annular groove for accommodating a seal is further provided on the side ring wall of the connection ring. After the connection holes are connected to the flanges on the pipeline, the seal placed in the annular groove can increase the sealing performance between the connection ring and the pipeline.

[0010] Further, the sampling holes are at least two sampling blind holes arranged at intervals along the length direction of the drip tube, and the orifices of the sampling blind holes are parallel to the radial direction of the connection ring. When the fluid in the pipeline is at normal pressure, the sampling holes are of a blind hole structure.

[0011] Further, the sampling holes are sampling through holes penetrating the peripheral wall of the drip tube, and both orifices of the sampling through holes are parallel to the radial direction of the connection ring. When the fluid pressure in the pipeline is relatively high, the sampling holes are of a through hole structure.

[0012] Further, a pressure measuring structure is connected to the top end of the drip tube, and a sampling structure is connected to the bottom end of the drip tube.

[0013] Further, the pressure measuring structure includes a proportional reducing valve and a pressure gauge connected in sequence to the top end of the drip tube.

[0014] Further, the sampling structure includes a constant value reducing valve and a sampling chamber connected in sequence to the bottom end of the drip tube, and the sampling structure further includes an adjustment switch connected to one side of the constant value reducing valve for controlling the constant value reducing valve.

[0015] To prevent leakage at the gap between the drip tube and the connection ring, further, a nut is further included. A relief hole is formed at the top of the nut. Opposite first through hole and second through hole are provided on the ring wall of the connection ring. The drip tube penetrates through the first through hole and the second through hole, and the nut seals the gap between the drip tube and the first through hole.

[0016] Further, a connection section extends radially outward along the hole wall of the first through hole from the connection ring. The top end of the drip tube is flush with the topmost end of the connection section, and an annular groove for placing a sealing ring is provided on the top end face of the drip tube.

[0017] Compared with the prior art, the advantages of the present invention are as follows: The device is provided with a drip tube penetrating the wall of the connecting ring. Sampling holes are provided on the drip tube, so that the sampled samples are representative. Pressure measurement and sampling are respectively carried out at both ends of the drip tube, and there is no mutual influence between pressure measurement and sampling. Since there is no need to open a sampling channel on the wall of the connecting ring, the thickness of the wall of the connecting ring is small, so that it can be directly connected to the flange on the pipeline through the axial connecting hole on the connecting ring. The device is small in volume and easy to be installed on the pipeline. Since the drip tube is detachably connected to the connecting ring, a suitable drip tube can be selected for sampling according to different fluid pressures. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the pipeline pressure measurement and sampling device according to an embodiment of the present invention;

[0019] Figure 2 is Figure 1 a schematic structural diagram of the pipeline pressure measurement and sampling device connected to the pipeline in

[0020] Figure 3 is Figure 1 a partial cross-sectional view of the pipeline pressure measurement and sampling device in

[0021] Figure 4 It is a schematic structural diagram of the connecting ring according to an embodiment of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the blind-hole type drip tube according to an embodiment of the present invention;

[0023] Figure 6 It is a schematic structural diagram of the through-hole type drip tube according to an embodiment of the present invention. Detailed Embodiments

[0024] The present invention will be further described in detail below in conjunction with the embodiments of the drawings.

[0025] As Figures 1 to 6 shown is a preferred embodiment of the pipeline pressure measurement and sampling device of the present invention. The pipeline pressure measurement and sampling device includes a connecting ring 1, a drip tube 2, a nut 3, a proportional reducing valve 4, a pressure gauge 5, a constant value reducing valve 6, an adjustment switch 7 and a sampling chamber 8. Among them, the connecting ring 1 is communicated with the pipeline 100 to be pressure measured or sampled. The proportional reducing valve 4 and the pressure gauge 5 are sequentially connected to the top end of the drip tube 2. The constant value reducing valve 6 and the sampling chamber 8 are sequentially connected to the bottom end of the drip tube 2. The adjustment switch 7 is connected to one side of the constant value reducing valve 6 to control the constant value reducing valve 6.

[0026] As Figure 1 , 2As shown in FIGS. 3 and 4, a connection hole 13 is provided on the connection ring 1. At the right end of the pipeline 100 on the left side of the connection ring 1, a flange 101 is provided, and at the left end of the pipeline 100 on the right side of the connection ring 1, a flange 101 is also provided. The bolts of the flange 101 on one side of the fluid transportation pipeline 100 pass through the connection hole 13 on the connection ring 1 and are connected to the nuts of the flange 101 on the other side of the pipeline 100, so that the device is accurately assembled with the flange 101 of the pipe 100 to be measured. On the one hand, the inner diameter of the connection ring 1 is equal to the inner diameter of the pipeline 100. When the fluid in the pipeline 100 passes through the connection ring 1, the flow rate of the fluid in the pipeline 100 will not change. On the other hand, an annular protrusion 11 extends from the outer ring wall of the connection ring 1, and the inner diameter of the annular protrusion 11 is equal to the outer diameter of the flange 101, and the flange 101 is just clamped in the annular protrusion 11. In addition, an annular groove 12 for accommodating a seal is provided on the side ring wall of the connection ring 1. After the connection hole 13 is connected to the flange 101 on the pipeline 100, the seal placed in the annular groove 12 can increase the sealing performance between the connection ring 1 and the pipeline 100.

[0027] A first through hole 14a and a second through hole 14b are provided oppositely on the ring wall of the connection ring 1, and the drip tube 2 passes through the first through hole 14a and the second through hole 14b in sequence; sampling holes are provided on the peripheral wall of the drip tube 2 located inside the inner ring wall of the connection ring 1 for transferring the sample in the pipeline 100 to both ends of the drip tube 2. In a specific embodiment, when the fluid in the pipeline is at atmospheric pressure or has a relatively small pressure, the sampling holes are a plurality of sampling blind holes 21 arranged at intervals along the length direction of the drip tube 2, and the orifices of the sampling blind holes 21 are parallel to the radial direction of the connection ring 1; when the fluid pressure in the pipeline is relatively large, the sampling holes are sampling through holes 22 penetrating the peripheral wall of the drip tube 2, and both orifices of the sampling through holes 22 are parallel to the radial direction of the connection ring 1, as Figure 5 、 6 shown.

[0028] As Figure 3As shown in the figure, the drip tube 2 is connected to the first through hole 14a and the second through hole 14b in the following manner: The second through hole 14b at the bottom of the connection ring 1 has a connection boss 16 extending radially outward along the hole wall of the connection ring 1. An internal thread is provided in the connection boss 16, and this internal thread is threadedly connected to the external thread near the bottom end of the drip tube 2; For the first through hole 14a at the top of the connection ring 1, a connection section 15 extends radially outward along the hole wall of the connection ring 1. The top end of the drip tube 2 is flush with the topmost end of the connection section 15. The outer peripheral wall of the connection section 15 is threadedly connected to the nut 3, and the top wall of the nut 3 seals the gap between the drip tube 2 and the first through hole 14a; A relief hole 31 is provided on the top wall of the nut 3. The diameter of the relief hole 31 is the same as the inner diameter of the drip tube 2. An internal thread for connecting to the constant ratio pressure reducing valve 4 is provided on the inner peripheral wall at the top end of the drip tube 2, and the constant ratio pressure reducing valve 4 passes through the relief hole 31 and is connected to the top end of the drip tube 2. In addition, an annular groove 23 for placing a sealing ring is provided on the top end surface of the drip tube 2, which can prevent the fluid in the pipeline 100 from leaking from the gap between the drip tube 2 and the first through hole 14a to the relief hole 31; The reason is that the diameter of the relief hole 31 on the top wall of the nut 3 is the same as the inner diameter of the drip tube 2, and the diameter of the relief hole 31 on the top wall of the nut 3 is smaller than the annular groove 23. Therefore, the O-ring placed in the annular groove 23 undergoes elastic deformation under the pressure of the top wall of the nut 3, creating a contact pressure on the sealing contact surface between the nut 3 and the drip tube 2. The contact pressure is greater than the internal pressure of the fluid to be sealed, so that the fluid in the fluid transportation pipeline 100 does not leak. In this embodiment, the connection section 15 near the bottom of the connection ring 1 is provided as a quadrilateral boss 17.

[0029] The usage method of this pipeline pressure measurement and sampling device is as follows:

[0030] Step 1: Connect the pipeline pressure measurement and sampling device to the fluid transportation system of the pipeline 100 through the flange 101 on the pipeline 100.

[0031] Step 2: Close the constant value pressure reducing valve 6. The fluid flows into the drip tube 2 from the sampling hole on the drip tube 2. After the fluid releases pressure through the constant ratio pressure reducing valve 4, the pressure gauge 5 shows the pressure of the fluid flowing through the constant ratio pressure reducing valve 4.

[0032] Step 3: Open the constant value pressure reducing valve 6. The fluid flows into the constant value pressure reducing valve 6 from the sampling hole on the drip tube 2. After the fluid releases pressure, it flows to the sampling chamber 8 to complete the sampling of the fluid.

[0033] This device simultaneously has the functions of measuring the pressure and sampling the fluid in pipeline 100. According to different usage scenarios, the corresponding drip tube 2 can be replaced to achieve sampling under different infusion pressure environments. This device can perform fixed-point testing on the pressures at different connection points in pipeline 100 without opening pipeline 100 and maintaining the normal transportation of the fluid in pipeline 100, and in-situ sampling can be carried out at the installation point of this device without stopping the machine, which is convenient for monitoring and sampling of the chemical products transported in the pipeline. Moreover, a pressure gauge 5 is installed above this device, and the opening size of the regulating switch 7 can be determined according to the real-time pressure in pipeline 100, etc., to avoid danger caused by the high-pressure fluid transported in pipeline 100.

Claims

1. A pipeline pressure measurement and sampling device, comprising Connecting ring (1), the connecting ring (1) and the pipeline (100) connected , characterized in that: It also includes A drip tube (2), the drip tube (2) penetrates the ring wall of the connection ring (1) along the radial direction of the connection ring (1), and both ends of the drip tube (2) protrude from the outer ring wall of the connection ring (1); sampling holes are arranged on the peripheral wall of the drip tube (2) inside the inner ring wall of the connection ring (1) for transferring the sample in the pipeline (100) to both ends of the drip tube (2).

2. The pipeline pressure measurement and sampling device according to claim 1, characterized in that: A connection hole (13) for connecting with the pipeline (100) is opened on the connection ring (1).

3. The pipeline pressure measurement and sampling device according to claim 2, characterized in that: An annular protrusion (11) extends from the outer ring wall of the connection ring (1); an annular groove (12) for accommodating a seal is also provided on the side ring wall of the connection ring (1).

4. The pipeline pressure measurement and sampling device according to claim 1, wherein: The sampling holes are at least two sampling blind holes (21) arranged at intervals along the length direction of the drip tube (2), and the orifices of the sampling blind holes (21) are parallel to the radial direction of the connection ring (1).

5. The pipeline pressure measurement and sampling device according to claim 1, wherein: The sampling holes are sampling through holes (22) penetrating the peripheral wall of the drip tube (2), and both orifices of the sampling through holes (22) are parallel to the radial direction of the connection ring (1).

6. The pipeline pressure measurement and sampling device according to claim 1, characterized in that: A pressure measurement structure is connected to the top end of the drip tube (2), and a sampling structure is connected to the bottom end of the drip tube (2).

7. The pipeline pressure measurement and sampling device according to claim 6, characterized in that: The pressure measurement structure includes a proportional reducing valve (4) and a pressure gauge (5) connected in sequence to the top end of the drip tube (2).

8. The pipeline pressure measurement and sampling device according to claim 6, characterized in that: The sampling structure includes a constant value reducing valve (6) and a sampling chamber (8) connected in sequence to the bottom end of the drip tube (2), and the sampling structure also includes an adjustment switch (7) connected to one side of the constant value reducing valve (6) for controlling the constant value reducing valve (6).

9. The pipeline pressure measurement and sampling device according to any one of claims 1 to 8, characterized in that: It also includes a nut (3), a relief hole (31) is opened at the top of the nut (3), opposite first through holes (14a) and second through holes (14b) are provided on the ring wall of the connection ring (1), the drip tube (2) penetrates through the first through hole (14a) and the second through hole (14b), and the nut (3) seals the gap between the drip tube (2) and the first through hole (14a).

10. The pipeline pressure measurement and sampling device according to claim 9, characterized in that: A connection section (15) extends radially outward along the hole wall of the first through hole (14a) of the connection ring (1), the top end of the drip tube (2) is flush with the topmost end of the connection section (15), and an annular groove (23) for placing a sealing ring is provided on the top end face of the drip tube (2).

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