Equipment for flushing pipeline type instrument

Abstract

A device for flushing a pipeline type instrument comprises a head flange used for being in butt joint with a first connecting flange at a first port of an instrument pipeline, and the center of the head flange is provided with a first through hole; the tail flange is used for being in butt joint with a second connecting flange at a second port of the instrument pipeline, and a second through hole is formed in the center of the tail flange; the inlet end of the cleaning liquid input pipeline is used for inputting an external cleaning medium, the outlet end of the cleaning liquid input pipeline is opened in the head flange and the periphery of the first through hole so as to be communicated with an internal channel of the instrument pipeline, and a pressure pump is arranged on the cleaning liquid input pipeline; the input end of the cleaning liquid output pipeline is opened in the tail flange and the periphery of the second through hole so as to be communicated with an internal channel of the instrument pipeline, and the output end of the cleaning liquid output pipeline is used for outputting a cleaning medium; and a first valve and a second valve are respectively arranged on the cleaning liquid input pipeline and the cleaning liquid output pipeline. The cleaning device can improve the cleaning efficiency and reduce the production interruption time.

Description

Technical Field

[0001] The utility model belongs to the technical field of instrument cleaning, and particularly relates to a device for flushing pipeline-type instruments. Background Art

[0002] Existing pipeline-type instruments generally include an instrument pipeline with connecting flanges at both ends and an instrument device arranged on the instrument pipeline for monitoring key parameters such as the temperature, pressure, flow rate, and liquid level of the medium in the pipeline. Specifically, it is like the Chinese invention patent application "A Flow Meter Capable of Measuring Pipeline Conditions" with the application number 202311819456.6 and the application publication number CN117705216A.

[0003] In the face of complex industrial production environments, especially in fields such as coal chemical industry and fine chemical industry, process media often have characteristics such as multiphase mixing, high viscosity, easy crystallization, and easy blockage, which pose severe challenges to instrument installation and maintenance. For example, when dealing with viscous slurries or pipelines with small diameters and coexisting multiple media, it is easy for material to accumulate on the instrument probe or the inner wall of the instrument pipeline, resulting in blockage of the inner channel of the instrument pipeline or causing self-aggregation of the medium, seriously affecting the true transmission of measurement signals and the precise response of the control system connected to the instrument.

[0004] In the prior art, in order to clean pipeline-type instruments, it is often necessary to remove the pipeline-type instruments, resulting in production interruption and low cleaning efficiency. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a device for flushing pipeline-type instruments according to the current situation of the prior art, so as to improve the cleaning efficiency and reduce the production interruption time.

[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows: A device for flushing pipeline-type instruments, characterized by comprising:

[0007] A head flange for docking to the first connecting flange at the first port of the instrument pipeline, and a first through hole axially penetrating is provided in the center of the head flange for the pipeline medium to pass through;

[0008] A tail flange for docking to the second connecting flange at the second port of the instrument pipeline, and a second through hole axially penetrating is provided in the center of the tail flange for the pipeline medium to pass through;

[0009] A cleaning liquid input pipeline, the inlet end of which is used for inputting an external cleaning medium, the outlet end of which opens on the periphery of the first through hole on the head flange to communicate with the internal channel of the instrument pipeline, and a pressure pump is provided on the cleaning liquid input pipeline to promote the cleaning medium to flow from the inlet end to the outlet end;

[0010] A cleaning liquid output pipeline, whose input end opens on the periphery of the second through hole on the tail flange to communicate with the internal channel of the instrument pipeline, and whose output end is used for outputting the cleaning medium;

[0011] Meanwhile, a first valve and a second valve for controlling the flow rate of the cleaning medium are respectively arranged on the cleaning liquid input pipeline and the cleaning liquid output pipeline.

[0012] The above-mentioned pressure pump can adopt existing extended-range pumps, pneumatic diaphragm pumps, etc.

[0013] In this way, when it is necessary to flush the pipeline-type instrument, the first valve and the pressure pump are opened, and the pipeline can be flushed with the cleaning medium. When flushing, the second valve on the cleaning liquid output pipeline is opened.

[0014] When the pipeline-type instrument needs to be used normally, the first and second valves are closed, and the pipeline medium can enter the instrument pipeline through the first through hole on the head flange and be output through the second through hole on the tail flange.

[0015] In summary, the utility model can efficiently flush the impurities in the pipeline without disassembling the pipeline-type instrument, reducing the cleaning time and cost.

[0016] Preferably, the cleaning liquid input pipeline includes a pipeline main body, a first annular pipe and an adapter pipe. The first annular pipe is sleeved on the outer periphery of the head flange along the circumferential direction. The adapter pipe is located between the first annular pipe and the head flange, and the first end of the adapter pipe opens on the pipe wall of the first annular pipe, and the second end of the adapter pipe opens on the periphery of the head flange and around the first through hole, so that the first annular pipe communicates with the internal channel of the instrument pipeline; one end of the pipeline main body serves as the inlet end of the cleaning liquid input pipeline, and the other end communicates with the first annular pipe.

[0017] In order to improve the flushing effect, preferably, there are at least two adapter pipes, which are arranged at intervals along the circumferential direction of the first annular pipe.

[0018] Furthermore, each adapter pipe extends radially relative to the first annular pipe, and the second end of each adapter pipe opens on the outer peripheral surface of the head flange and communicates with the first through hole through a corresponding radially extending third through hole on the outer peripheral surface.

[0019] Thus, the cleaning medium can be ejected laterally into the pipeline and generate a swirling force of the water flow to effectively flush the inside of the pipeline.

[0020] Furthermore, taking two adjacent adapter pipes in the circumferential direction as a group, there are at least two groups, and the included angle between the two adapter pipes in each group is 20-40°.

[0021] To further improve the flushing effect, preferably, a second annular pipe is further included. The pipe wall of the second annular pipe surrounds the outer periphery of the pipe wall of the first annular pipe, and the pipe walls of the two are spaced relatively under the action of an intermediate support to form an annular cavity with an annular cross-section. An inlet connection for inputting a heating medium and an outlet connection for outputting the heating medium are provided on the annular cavity;

[0022] The pipe wall of the first annular pipe is a heat-conducting wall that can conduct heat.

[0023] In the above solutions, preferably, a filter for filtering impurities is further provided on the cleaning liquid output pipeline. Along the flow direction of the cleaning medium, the filter is located downstream of the second valve.

[0024] Preferably, the output end of the cleaning liquid output pipeline is communicated with the inlet end of the cleaning liquid input pipeline.

[0025] Preferably, a bypass pipeline provided with a bypass valve is further included, and both ends thereof are respectively connected to positions upstream and downstream of the pressure pump on the cleaning liquid input pipeline.

[0026] Preferably, an anti-sticking coating is provided on the inner surface of the head flange and / or the tail flange for docking to the port of the instrument pipeline.

[0027] Compared with the prior art, the advantages of the present utility model are as follows: When it is necessary to flush a pipeline-type instrument, the first valve and the pressure pump are opened, and the pipeline can be flushed with the cleaning medium. When flushing, the second valve on the cleaning liquid output pipeline is opened.

[0028] When the pipeline-type instrument needs to be used normally, the first and second valves are closed, and the pipeline medium can enter the instrument pipeline through the first through hole on the head flange and be output through the second through hole on the tail flange.

[0029] In summary, the present utility model can efficiently flush impurities in the pipeline without disassembling the pipeline-type instrument, reducing the cleaning time and cost. Description of the Drawings

[0030] Figure 1 is a usage state diagram of an embodiment of the present utility model;

[0031] Figure 2 is Figure 1 a schematic structural diagram in the A direction in

[0032] Figure 3 is Figure 1 a schematic structural diagram in the B direction in

[0033] Figure 4 is Figure 2 a cross-sectional view taken along the C-C direction in Detailed Embodiments

[0034] The following further describes the present utility model in detail in conjunction with the embodiments with attached drawings.

[0035] As Figures 1 to 4 shown, it is a preferred embodiment of a device for flushing a pipeline-type instrument of the present utility model, wherein the pipeline-type instrument includes an instrument pipeline 1 and an instrument device 10 provided on the instrument pipeline 1, and first connection flanges 11 and second connection flanges 12 are respectively provided at both ends of the instrument pipeline 1.

[0036] The device of this embodiment includes a head flange 2, a tail flange 3, a cleaning liquid input pipeline 4, a cleaning liquid output pipeline 5, a second annular pipe 6, and a bypass pipeline 7.

[0037] The head flange 2 is butt-jointed to the first connection flange 11 of the instrument pipeline 1 through bolts, and a first through hole 21 axially penetrating is provided in the center of the head flange 2 for the pipeline medium to pass through. A plurality of radially extending third through holes 22 are circumferentially spaced on the outer peripheral portion of the head flange 2. The outer ends of the third through holes 22 open to the outer peripheral surface of the head flange 2, and the inner ends open to the inner wall of the first through hole 21. In this embodiment, two circumferentially adjacent third through holes 22 are in a group, and there are four groups. The included angle a between the two third through holes 22 in each group is 20 to 40° (the included angle a can be any value between 20 and 40°, such as 20°, 30°, 40°, etc.).

[0038] The tail flange 3 is butt-jointed to the second connection flange 12 of the instrument pipeline 1 through bolts, and a second through hole 31 axially penetrating is provided in the center of the tail flange 3 for the pipeline medium to pass through. A radially extending fourth through hole is provided in the outer peripheral portion of the tail flange 3. The outer end of the fourth through hole opens to the outer peripheral surface of the tail flange 3, and the inner end opens to the inner wall of the second through hole 31.

[0039] Meanwhile, anti-adhesion coatings made of Teflon or polytetrafluoroethylene are provided on the inner surfaces of the head flange 2 and the tail flange 3 for butt-jointing to the ports of the instrument pipeline 1 to avoid adhesion of the pipeline medium.

[0040] The cleaning liquid input pipeline 4 includes a pipeline body 43, a first annular tube 44 and a connecting tube 45. The first annular tube 44 is circumferentially sleeved on the outer periphery of the head flange 2, and the tube wall of the first annular tube 44 is a heat-conducting wall capable of conducting heat. The number of connecting tubes 45 is consistent with the number of the third through holes 22, and each connecting tube 45 is located between the first annular tube 44 and the head flange 2 and extends radially. The first end of each connecting tube 45 opens to the tube wall of the first annular tube 44, and the second end of each connecting tube 45 is arranged on the outer peripheral surface of the head flange 2, and is opposite to and connected to the outer end of the corresponding third through hole 22, so that the first annular tube 44 is connected to the internal channel of the instrument pipeline 1 through the connecting tube 45 and the third through hole 22. One end of the pipeline body 43 serves as the inlet end of the cleaning liquid input pipeline 4 for the input of external cleaning medium, and a valve is arranged at the inlet end, and the other end of the pipeline body 43 is connected to the first annular tube 44. Meanwhile, a booster pump 41 is provided on the pipeline body 43 to promote the cleaning medium to flow from one end to the other end of the pipeline body 43. A first valve 42 for controlling the flow of the cleaning medium is provided on the pipeline body 43. The first valve 42 is located downstream of the booster pump 41 along the flow direction of the cleaning medium.

[0041] The tube wall of the second annular tube 6 surrounds the outer circumference of the tube wall of the first annular tube 44, and the tube walls of the two are spaced and opposite to each other under the action of the intermediate support member 61 to form an annular cavity 60 with an annular cross section, and the annular cavity 60 is provided with an inlet pipe 62 for input of the heating medium (steam) and an outlet pipe 63 for output of the heating medium, and the inlet pipe 62 and the outlet pipe 63 are both provided with a switch valve. In this embodiment, the support member 61 is radially arranged in the annular cavity 60 in a clockwise or counterclockwise direction, for details, please refer to Figure 4 .

[0042] Both ends of the bypass line 7 are respectively connected to the upstream and downstream positions of the pressure pump 41 on the cleaning liquid input line 4, and a bypass valve 71 for controlling the flow rate is provided on the bypass line 7.

[0043] The input end of the cleaning liquid output pipeline 5 is arranged on the outer peripheral surface of the tail flange 3, and is arranged corresponding to the outer end opening of the fourth through hole to connect the internal channel of the instrument pipeline 1. The output end of the cleaning liquid output pipeline 5 is connected to the inlet end of the cleaning liquid input pipeline 4. In addition, the cleaning liquid output pipeline 5 is provided with a second valve 51 for controlling the flow of the cleaning medium and a filter 52 for filtering impurities in the cleaning medium. Along the flow direction of the cleaning medium, the filter 52 is located downstream of the second valve 51. In this way, the flushed cleaning medium can be filtered through the filter 52 and returned to the cleaning liquid input pipeline 4 to achieve recycling. At the same time, this embodiment is also provided with a filter differential pressure gauge 53, which is used to monitor the pressure difference of the cleaning medium entering and leaving the filter, so as to facilitate the judgment of whether the filter element of the filter needs to be cleaned or replaced.

[0044] When it is necessary to flush the pipeline instrument, the following three flushing modes can be adopted:

[0045] 1. Ordinary flushing: Open the valve at the inlet end of the cleaning liquid input pipeline 4, the bypass valve 71, and the first valve 42, and use the cleaning medium to flush the pipeline. When flushing, open the second valve 51 on the cleaning liquid output pipeline 5.

[0046] 2. Pressurized flushing: Open the valve at the inlet end of the cleaning liquid input pipeline 4 and the first valve 42, close the bypass valve 71, and the cleaning medium is only pressurized and flushed through the pressurizing pump 41. When flushing, open the second valve 51 on the cleaning liquid output pipeline 5.

[0047] 3. Special flushing: On the basis of Mode 1 or 2, open the switching valve at the inlet connection 62 of the second annular pipe 6, so that the hot steam enters the annular cavity 60, and transfers the heat to the cleaning medium in the first annular pipe to heat the cleaning medium, improving the flushing effect.

[0048] When the pipeline instrument needs to be used normally, just close the valve at the inlet end of the cleaning liquid input pipeline 4, the first valve 42, and the second valve 51. The pipeline medium can enter the instrument pipeline 1 through the first through hole 21 on the head flange 2 and be output through the second through hole 31 on the tail flange 3.

[0049] In summary, the utility model can efficiently flush the impurities in the pipeline 1 without disassembling the pipeline instrument, reducing the cleaning time and cost.

[0050] In the description and claims of the present utility model, the term "radial direction" is also used, which means basically along the inner and outer directions, not limited to just the radial direction passing through the center of the circle, and can also be slightly skewed relative to the radial direction.

Claims

1. An apparatus for flushing pipeline meters, characterized in that Included are: The head flange (2) is used for butting to the first connecting flange (11) at the first port of the instrument pipeline (1), and a first through hole (21) extending axially through the center of the head flange (2) is provided for the pipeline medium to pass through; The tail flange (3) is used to connect to the second connecting flange (12) at the second port of the instrument pipeline (1), and a second through hole (31) extending axially through the center of the tail flange (3) is provided for the pipeline medium to pass through; A cleaning liquid input pipeline (4), the inlet end of which is used for inputting external cleaning medium, and the outlet end of which is opened on the head flange (2) and outside the first through hole (21) to communicate with the internal channel of the instrument pipeline (1), and a pressure pump (41) is provided on the cleaning liquid input pipeline (4) to promote the cleaning medium to flow from the inlet end to the outlet end; A cleaning liquid output pipeline (5), the input end of which opens on the tail flange (3) and the periphery of the second through hole (31) to communicate with the internal channel of the instrument pipeline (1), and the output end of which is used for outputting the cleaning medium; At the same time, the cleaning liquid input pipeline (4) and the cleaning liquid output pipeline (5) are respectively provided with a first valve (42) and a second valve (51) for controlling the flow rate of the cleaning medium.

2. The device according to claim 1, characterized in that: The cleaning liquid input pipeline (4) comprises a pipeline body (43), a first annular tube (44) and a connecting tube (45); the first annular tube (44) is sleeved on the outer periphery of the head flange (2) along the circumferential direction; the connecting tube (45) is located between the first annular tube (44) and the head flange (2); the first end of the connecting tube (45) opens to the tube wall of the first annular tube (44); the second end of the connecting tube (45) opens to the outer periphery of the first through hole (21) on the head flange (2), so that the first annular tube (44) is connected to the internal channel of the instrument pipeline (1); one end of the pipeline body (43) serves as the inlet end of the cleaning liquid input pipeline (4), and the other end is connected to the first annular tube (44).

3. The device according to claim 2, characterized in that: There are at least two connecting tubes (45), which are arranged at intervals along the circumference of the first annular tube (44).

4. The device according to claim 3, characterized in that: Each connecting tube (45) extends radially relative to the first annular tube (44), and the second end of each connecting tube (45) opens to the outer peripheral surface of the head flange (2), and is connected to the first through hole (21) through a third through hole (22) extending radially on the outer peripheral surface.

5. The device according to claim 4, characterized in that: The connecting tubes (45) adjacent to each other in the circumferential direction form a group, and there are at least two groups, and the angle between the two connecting tubes (45) in each group is 20-40 degrees.

6. The device according to claim 2, characterized in that: It also includes a second annular tube (6), whose tube wall surrounds the outer circumference of the tube wall of the first annular tube (44), and the tube walls of the two are spaced and opposed to each other under the action of the intermediate support member (61) to form an annular cavity (60) with an annular cross section, and the annular cavity (60) is provided with an inlet pipe (62) for inputting a heating medium and an outlet pipe (63) for outputting the heating medium; The tube wall of the first annular tube (44) is a heat-conducting wall capable of conducting heat.

7. The device according to any one of claims 1 to 6, characterized in that: A filter (52) for filtering impurities is further provided on the cleaning liquid output pipeline (5), and along the flow direction of the cleaning medium, the filter (52) is located downstream of the second valve (51).

8. The device according to claim 7, wherein: The output end of the cleaning liquid output pipeline (5) is communicated with the inlet end of the cleaning liquid input pipeline (4).

9. The device according to any one of claims 1 to 6, characterized in that: It further includes a bypass pipeline (7) provided with a bypass valve (71), and both ends of the bypass pipeline are respectively connected to positions upstream and downstream of the pressure pump (41) on the cleaning liquid input pipeline (4).

10. The device according to any one of claims 1 to 6, characterized in that: An anti-adhesion coating is provided on the inner surface of the head flange (2) and / or the tail flange (3) for docking to the port of the instrument pipeline (1).

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