An automatic drainage system

Abstract

The embodiment of the present invention provides an automatic drain system, comprising: a temperature detection component, arranged on a steam pipe, for measuring the temperature of the top inner wall and the bottom inner wall of the steam pipe; a flow regulating device, arranged on a drain pipe of the steam pipe, for regulating the outlet flow of the drain pipe; and a control device, for regulating the outlet flow of the drain pipe by controlling the flow regulating device according to the temperature of the top inner wall and the bottom inner wall of the steam pipe measured by the temperature detection component. This solution can improve steam utilization and shorten pipe warming time.

Description

Technical Field

[0001] The invention relates to the technical field of steam pipeline draining, in particular to an automatic draining system. Background Art

[0002] When the steam pipe is warmed up, the heat of the steam is absorbed by the cold steam pipe, and the steam is transformed from superheated steam to saturated steam carrying a large amount of condensed water, thereby generating condensed water. In order to prevent the condensed water from causing the "water hammer" phenomenon, the condensed water in the steam pipe needs to be discharged in time, that is, drained.

[0003] Before the pipe heating is completed, the temperature of the steam pipe rises after absorbing steam. As the temperature of the steam pipe tends to be consistent with the temperature of the steam, the steam no longer changes from superheated steam to saturated steam carrying condensed water due to heat loss. No more condensed water is generated in the steam pipe, and the drainage can be stopped at this time.

[0004] like Figure 1 As shown, the existing drain device includes a drain pipe 12 and an exhaust pipe 13 arranged on the steam pipe 1, and a manual valve 151 is arranged on the drain pipe 12 and the exhaust pipe 13. At present, since the on-site operator cannot judge the state of the steam in the steam pipe 1, the manual valve 151 on the drain pipe 12 is usually opened for draining before heating the steam pipe 1, and the manual valve 151 on the drain pipe 12 is closed to stop draining after the heating is completed. This method of opening the drain pipe 12 for draining during the heating process wastes a lot of steam, resulting in low steam utilization and long heating time. Summary of the invention

[0005] The purpose of the embodiment of the present invention is to provide an automatic drain system to improve steam utilization and shorten pipe warming time. The specific technical solution is as follows:

[0006] An embodiment of the present invention provides an automatic drain system, comprising:

[0007] A temperature detection component is provided on the steam pipe and is used to measure the temperature of the top inner wall and the bottom inner wall of the steam pipe;

[0008] A flow regulating device, arranged on the drain pipe of the steam pipe, for regulating the outlet flow of the drain pipe;

[0009] The control device is used to adjust the outlet flow of the drain pipe by controlling the flow regulating device according to the temperatures of the top inner wall and the bottom inner wall of the steam pipe measured by the temperature detection component.

[0010] Optionally, the control device is specifically used to reduce the outlet flow of the drain pipe by controlling the flow regulating device when the temperature difference between the top inner wall and the bottom inner wall of the steam pipe is greater than a preset threshold value and the temperature difference continues to decrease;

[0011] When the temperature difference between the top inner wall and the bottom inner wall of the steam pipe is less than a preset threshold, the drain pipe is closed by controlling the flow regulating device.

[0012] Optionally, the system further includes:

[0013] N electric isolation valves are arranged at intervals on the steam pipeline and are used to divide the steam pipeline into N+1 sections of the first pipeline;

[0014] N bypass loops, connecting two adjacent sections of the first pipeline and connected in parallel with the electric isolation valve; wherein the bypass loop is provided with an electric valve for opening or closing the bypass loop;

[0015] Correspondingly, the number of the drainage pipes is N+1, and each of the first pipes is connected to a drainage pipe;

[0016] The number of the temperature detection components and the flow regulating devices are both N+1, each of the temperature detection components is arranged on one of the first pipes, and each of the flow regulating devices is arranged on one of the drain pipes;

[0017] The control device is used to adjust the outlet flow of each first pipe by controlling the flow regulating device on the drain pipe connected to the first pipe according to the temperature of the top inner wall and the bottom inner wall of the first pipe detected by the temperature detection component arranged on the first pipe.

[0018] Optionally, the flow regulating device includes an electric stop valve or an electric regulating valve.

[0019] Optionally, the temperature detection component includes a pair of patch-type remote thermometers symmetrically arranged on the top inner wall and the bottom inner wall of the steam pipe.

[0020] Optionally, the patch-type remote thermometer adopts a wall-mounted thermocouple.

[0021] In the automatic drain system provided by an embodiment of the present invention, the control device adjusts the outlet flow of the drain pipe by controlling the flow regulating device according to the temperatures of the top inner wall and the bottom inner wall of the steam pipe measured by the temperature detection component. The draining can be stopped in time when no condensed water is generated in the steam pipe, thereby preventing a large amount of steam loss, effectively improving the steam utilization rate, and shortening the pipe warming time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0023] Figure 1 It is a structural schematic diagram of an existing hydrophobic device;

[0024] Figure 2 A schematic structural diagram of an automatic drain system provided by an embodiment of the present invention;

[0025] Figure 3 A schematic structural diagram of another automatic drain system provided in an embodiment of the present invention.

[0026] The descriptions of the numbers in the figure are as follows:

[0027] 1—steam pipeline, 10—electric isolation valve, 11—first pipeline, 111—temperature detection component;

[0028] 12—drain pipe, 121—flow regulating device, 122—container;

[0029] 13—Exhaust duct;

[0030] 14—bypass circuit, 141—electric valve;

[0031] 151—Manual valve. DETAILED DESCRIPTION

[0032] The technical solution of the embodiment of the present invention is described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0033] In order to improve steam utilization and shorten pipe warming time, an embodiment of the present invention provides an automatic drain system.

[0034] like Figure 2 As shown, an automatic drain system provided by an embodiment of the present invention includes:

[0035] The temperature detection component 111 is arranged on the steam pipe 1 and is used to measure the temperature of the top inner wall and the bottom inner wall of the steam pipe 1;

[0036] A flow regulating device 121, arranged on the drain pipe 12 of the steam pipe 1, for regulating the outlet flow of the drain pipe 12;

[0037] The control device is used to adjust the outlet flow of the drain pipe 12 by controlling the flow regulating device 121 according to the temperatures of the top inner wall and the bottom inner wall of the steam pipe 1 measured by the temperature detection component 111.

[0038] It should be noted that, in the embodiment of the present invention, by detecting the temperatures of the top inner wall and the bottom inner wall at a preset position of the steam pipe 1 by the temperature detection component 111, the amount of condensed water condensed in the steam pipe 1 can be determined, thereby adjusting the outlet flow of the drain pipe 12 until the drain pipe 12 is closed and the draining is stopped.

[0039] In addition, the steam pipe 1 is also provided with an exhaust pipe 13, and a manual valve 151 is provided on the exhaust pipe. The manual valve 151 needs to be opened before heating the pipe to allow the steam entering the steam pipe to circulate. The drain pipe 12 can also be provided with a manual valve 151, which is in a normally open state; when the equipment is being repaired, the manual valve 151 can be closed to facilitate the repair of the flow regulating device 121.

[0040] The condensed water discharged through the drain pipe 12 can be stored in a container 122 such as a reservoir and recycled as cooling water, or it can be directly discharged into the sewer.

[0041] In the automatic drain system provided by an embodiment of the present invention, the control device adjusts the outlet flow of the drain pipe by controlling the flow regulating device according to the temperatures of the top inner wall and the bottom inner wall of the steam pipe measured by the temperature detection component. The draining can be stopped in time when no condensed water is generated in the steam pipe, thereby preventing a large amount of steam loss, effectively improving the steam utilization rate, and shortening the pipe warming time.

[0042] Optionally, the control device is specifically used to reduce the outlet flow of the drain pipe 12 by controlling the flow regulating device 121 when the temperature difference between the top inner wall and the bottom inner wall of the steam pipe 1 is greater than a preset threshold value and the temperature difference continues to decrease;

[0043] When the temperature difference between the top inner wall and the bottom inner wall of the steam pipe 1 is less than a preset threshold, the drain pipe 12 is closed by controlling the flow regulating device 121 .

[0044] It should be noted that when the temperature difference between the top inner wall and the bottom inner wall of the steam pipe 1 measured by the temperature detection component 111 continues to decrease, it can be known that the condensed water accumulated in the steam pipe 1 is reduced. At this time, by controlling the flow reduction device to adjust the outlet flow of the drain pipe, the condensed water can be discharged in time and the loss of steam can be effectively reduced; and when the temperature difference between the top inner wall and the bottom inner wall of the steam pipe 1 is less than the preset threshold, it can be considered that the condensed water of the steam pipe 1 has been completely discharged and no condensed water is generated in the steam pipe 1. At this time, closing the drain pipe 12 can reduce unnecessary loss of steam. Through the solution of the embodiment of the present invention, steam loss can be effectively reduced, thereby improving steam utilization and shortening pipe warming time.

[0045] It is understandable that the size of the preset threshold value is related to factors such as the size of the steam pipe, the steam pressure and flow rate transmitted by the steam pipe, and can be set according to actual needs.

[0046] Optional, such as Figure 3 As shown, considering that in actual applications, the length of the steam pipeline may be particularly long, in order to improve the drainage effect of the condensed water in the steam pipeline and quickly discharge the condensed water in the steam pipeline, the system may also include:

[0047] N electric isolation valves 10 are arranged at intervals on the steam pipeline 1 to divide the steam pipeline 1 into N+1 sections of the first pipeline 11;

[0048] N bypass loops 14, connecting two adjacent sections of the first pipeline 11 and connected in parallel with the electric isolation valve 10; wherein the bypass loop 14 is provided with an electric valve 141 for opening or closing the bypass loop 14;

[0049] Correspondingly, the number of the drain pipes 12 is N+1, and each of the first pipes 11 is connected to one of the drain pipes 12;

[0050] The number of the temperature detection components 111 and the flow regulating devices 121 is N+1, each of the temperature detection components 111 is arranged on one of the first pipes 11, and each of the flow regulating devices is arranged on one of the drain pipes 12;

[0051] The control device is used to adjust the outlet flow of the drain pipe 12 connected to the first pipe 11 by controlling the flow regulating device 121 on the drain pipe 12 connected to the first pipe 11, according to the temperature of the top inner wall and the bottom inner wall of the first pipe 11 detected by the temperature detection component 111 arranged on the first pipe 11.

[0052] It can be understood that for a particularly long steam pipe 1, the embodiment of the present invention divides the steam pipe 1 into a plurality of shorter first pipes 11 by providing an electric isolating valve 10 on the steam pipe 1. For each shorter first pipe 11, automatic drainage can be performed in the same manner as in the above embodiment. After the drainage of the previous section of the first pipe 11 is completed, the drainage of the next section of the first pipe 11 can be quickly performed, and the drainage of the remaining first pipes 11 can be completed in succession, so that the condensed water in the steam pipe 1 can be quickly discharged as a whole. The length of the first pipe can be flexibly set according to the actual scenario of the pipeline laying site, Figure 3 The number N of the electric isolating valves 10 is two, and the number N of the electric isolating valves 10 is determined according to the actual length of the steam pipeline 1 .

[0053] In addition, the system further comprises an exhaust pipe 13 , which is arranged on the first pipe 11 corresponding to the drain pipe, and the number of the exhaust pipe 13 is the same as the number of the drain pipe 12 .

[0054] Optionally, the flow regulating device 121 includes an electric stop valve or an electric regulating valve.

[0055] The control device can adjust the outlet flow of the drain pipe 12 by controlling the opening of the electric stop valve or the electric regulating valve.

[0056] Optionally, the temperature detection component 111 includes a pair of remote thermometers symmetrically arranged on the top inner wall and the bottom inner wall of the steam pipe 1.

[0057] Among them, the remote thermometer has the characteristics of small temperature measuring probe, high sensitivity, linear scale, long life, etc. The remote thermometer is widely used, and its specific structure belongs to the existing technology and will not be repeated here.

[0058] Optionally, the remote thermometer may be a wall-mounted thermocouple.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. An automatic drain system, characterized in that: include: A temperature detection component (111) is arranged on the steam pipe (1) and is used to measure the temperature of the top inner wall and the bottom inner wall of the steam pipe (1); A flow regulating device (121), arranged on the drain pipe (12) of the steam pipe (1), and used for regulating the outlet flow of the drain pipe (12); a control device, used for adjusting the outlet flow rate of the drain pipe (12) by controlling the flow regulating device (121) according to the temperatures of the top inner wall and the bottom inner wall of the steam pipe (1) measured by the temperature detection component (111); N electric isolation valves (10) are arranged at intervals on the steam pipeline (1) and are used to divide the steam pipeline (1) into N+1 sections of the first pipeline (11); N bypass loops (14), connecting two adjacent sections of the first pipeline (11) and connected in parallel with the electric isolation valve (10); wherein the bypass loop (14) is provided with an electric valve (141) for opening or closing the bypass loop (14); Correspondingly, the number of the drainage pipes (12) is N+1, and each of the first pipes (11) is connected to one drainage pipe (12); The number of the temperature detection components (111) and the flow regulating devices (121) is N+1, each of the temperature detection components (111) is arranged on one of the first pipes (11), and each of the flow regulating devices is arranged on one of the drain pipes (12); The control device is used for adjusting the outlet flow of each first pipe (11) by controlling a flow regulating device (121) on a drain pipe (12) connected to the first pipe (11), based on the temperatures of the top inner wall and the bottom inner wall of the first pipe (11) detected by the temperature detection component (111) arranged on the first pipe (11).

2. The automatic drain system according to claim 1, characterized in that: The control device is specifically used for reducing the outlet flow rate of the drain pipe (12) by controlling the flow regulating device (121) when the temperature difference between the top inner wall and the bottom inner wall of the steam pipe (1) is greater than a preset threshold value and the temperature difference continues to decrease; When the temperature difference between the top inner wall and the bottom inner wall of the steam pipe (1) is less than a preset threshold, the drain pipe (12) is closed by controlling the flow regulating device (121).

3. The automatic drain system according to any one of claims 1 or 2, characterized in that: The flow regulating device (121) comprises an electric stop valve or an electric regulating valve.

4. The automatic drain system according to claim 1, characterized in that: The temperature detection component (111) comprises a pair of patch-type remote thermometers symmetrically arranged on the top inner wall and the bottom inner wall of the steam pipe (1).

5. The automatic drain system according to claim 4, characterized in that: The patch type remote thermometer adopts a wall-mounted thermocouple.

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