Steam pressure reducing device for gypsum board production line and control method

Abstract

The invention discloses a gypsum board production line steam pressure reduction device which is provided with a steam conveying pipeline, a coarse adjustment pressure reduction assembly, a fine adjustment pressure reduction assembly, a pressure monitoring assembly and a control module, and the coarse adjustment pressure reduction assembly, the fine adjustment pressure reduction assembly and the pressure monitoring assembly are all in communication connection with the control module. The steam conveying pipeline is used for conveying high-pressure steam, and the coarse adjustment pressure reduction assembly and the fine adjustment pressure reduction assembly are arranged in the conveying direction of the high-pressure steam in the steam conveying pipeline. According to the invention, the coarse adjustment pressure reduction assembly and the fine adjustment pressure reduction assembly are arranged on the steam conveying pipeline, and the coarse adjustment pressure reduction assembly or the fine adjustment pressure reduction assembly is selectively started to adjust the steam pressure according to the fluctuation generated by the high-pressure steam pressure at the steam inlet end of the steam conveying pipeline; therefore, the stability of the steam pressure at the steam outlet end of the tidy conveying pipeline is kept, the starting frequency of each pressure reduction assembly is reduced, and the stability of the output steam pressure is controlled more accurately.

Description

Technical Field

[0001] The invention relates to the technical field of steam transportation, and in particular to a steam pressure reducing device for a gypsum board production line. Background Art

[0002] In a gypsum board production line, gypsum calcination and subsequent drying of gypsum boards require a large amount of mobile heat. Due to the high efficiency of high-temperature and high-pressure steam transmission, existing gypsum board production lines use high-temperature and high-pressure steam to provide heat energy for the above process.

[0003] Among them, high-pressure steam usually comes from power plant steam or steam produced by boilers burning in factories. When power plant steam or boilers burning in factories produce steam, the steam pressure is not stable. If gypsum boards are produced and processed through this steam, the excessively high-pressure steam will not only damage the gypsum board production equipment, but also be detrimental to the calcination of gypsum and the drying of gypsum boards, resulting in an excessively high defective rate of gypsum boards.

[0004] Based on this, a steam pressure reducing device and control method for a gypsum board production line is now used to reduce the high-pressure steam to the temperature actually required for production, and the temperature of the steam after temperature reduction is maintained at a stable value, providing a stable heat source for gypsum calcination and board drying. Summary of the invention

[0005] The object of the present invention is to provide a steam pressure reducing device for a gypsum board production line to solve the technical problem of unstable steam pressure for calcining gypsum boards in the prior art.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A gypsum board production line steam decompression device, comprising a steam delivery pipeline, a coarse-adjustment decompression component, a fine-adjustment decompression component, a pressure monitoring component and a control module, wherein the coarse-adjustment decompression component, the fine-adjustment decompression component and the pressure monitoring component are all communicatively connected with the control module;

[0008] The steam delivery pipeline is used to deliver high-pressure steam, and the coarse-adjustment pressure-reducing assembly and the fine-adjustment pressure-reducing assembly are arranged along the high-pressure steam transmission direction in the steam delivery pipeline;

[0009] The pressure monitoring assembly includes a first pressure monitor and a second pressure monitor disposed at the steam inlet end and the steam outlet end of the steam delivery pipeline;

[0010] The pressure monitoring component feeds back the monitoring signal to the control module, and the control module identifies the signal and sends instructions to the coarse pressure reducing component and the fine pressure reducing component to change the pressure of the steam in the steam delivery pipeline.

[0011] As a preferred solution of the present invention, the coarse-adjustment pressure reducing assembly includes a plurality of primary pressure reducing valves arranged along the steam delivery pipeline, and the fine-adjustment pressure reducing assembly includes a plurality of secondary pressure reducing valves arranged along the steam delivery pipeline;

[0012] The steam pressure reduction range of the first-stage pressure reducing valve on the steam in the steam delivery pipeline is greater than the steam pressure reduction range of the second-stage pressure reducing valve on the steam in the steam delivery pipeline.

[0013] As a preferred solution of the present invention, the pressure monitoring assembly further includes a third pressure monitor disposed at the rear side of the primary pressure reducing valve and the secondary pressure reducing valve, and each of the third pressure monitors is communicatively connected to the control module;

[0014] The control module calculates the range of steam pressure reduction in the steam delivery pipeline by each of the first-level pressure reducing valve and the second-level pressure reducing valve through the third pressure monitor;

[0015] When the steam pressure fluctuation difference at the steam inlet end of the steam delivery pipeline is less than a set value, the control module changes the steam pressure in the steam delivery pipeline through the fine-tuning pressure reducing component;

[0016] When the steam pressure fluctuation difference at the steam inlet end of the steam delivery pipeline is greater than a set value, the control module changes the steam pressure in the steam delivery pipeline through the coarse adjustment pressure reducing component.

[0017] As a preferred solution of the present invention, a plurality of partitions are arranged in the steam delivery pipeline, and the partitions divide the interior of the steam delivery pipeline into a plurality of slow flow chambers, and the primary pressure reducing valve and the secondary pressure reducing valve are respectively arranged in separate slow flow chambers;

[0018] A connecting pipe connecting two adjacent slow-flow chambers is arranged on the partition plate, and the two adjacent connecting pipes are staggered so that steam can flow spirally in the steam delivery pipeline.

[0019] As a preferred solution of the present invention, a condensate collecting assembly is provided on the side wall of the steam delivery channel, and the condensate collecting assembly is used to collect condensate in the slow flow chamber where the first-level pressure reducing valve is located.

[0020] As a preferred solution of the present invention, the condensate collection assembly includes a U-shaped tube, a piston block and a driving member are arranged in the U-shaped tube, the piston block can slide back and forth along the U-shaped tube, and the driving member is fixedly installed in the U-shaped tube to drive the piston block to slide in the U-shaped tube;

[0021] The two ends of the U-shaped tube are connected to the same slow flow chamber, and the two ends of the U-shaped tube are respectively located on both sides of the primary pressure reducing valve, so that the piston block can slide in the U-shaped tube under the action of the pressure difference at both ends of the U-shaped tube.

[0022] As a preferred solution of the present invention, the driving member includes a fixing ring fixedly connected inside the U-shaped tube, and a spring is connected between the fixing ring and the piston block.

[0023] As a preferred solution of the present invention, a drainage component is connected to the U-shaped tube, and the drainage component is used to isolate and discharge the condensed water collected in the U-shaped tube.

[0024] As a preferred solution of the present invention, the drainage assembly includes a water collecting pipe connected to the U-shaped pipe, and the water collecting pipe is kept vertical so that the condensed water in the U-shaped pipe can flow into the water collecting pipe under the action of its own gravity;

[0025] A first control valve and a second control valve are installed on the water collecting pipe along the length direction thereof.

[0026] A gypsum board production line steam pressure reduction control method comprises the following steps:

[0027] S100, transporting high-pressure steam through a steam transport pipeline;

[0028] S200, monitoring the steam pressure at the steam inlet and steam outlet of the steam transmission pipeline in real time through a pressure monitoring component;

[0029] S300, the control module starts the coarse adjustment pressure reducing component and / or the fine adjustment pressure reducing component according to the monitoring feedback of the pressure monitoring component to adjust the steam pressure inside the steam transmission pipeline so that the steam pressure load at the steam outlet end of the steam transmission pipeline is used in a standard manner;

[0030] S400, using a condensate collection component to collect condensate generated in the steam delivery pipeline, and draining the collected condensate regularly through a drainage component.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] In the present invention, a coarse adjustment pressure reducing component and a fine adjustment pressure reducing component are arranged on the steam conveying pipeline. In response to the fluctuation of the high-pressure steam pressure at the steam inlet end of the steam conveying pipeline, the coarse adjustment pressure reducing component or the fine adjustment pressure reducing component is selectively started to adjust the steam pressure, thereby maintaining the stability of the steam pressure at the steam outlet end of the conveying pipeline, reducing the starting frequency of each pressure reducing component and more accurately controlling the stability of the output steam pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0034] Figure 1 A schematic diagram of the appearance structure of a steam pressure reducing device for a gypsum board production line is provided for an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the internal structure of a steam pressure reducing device for a gypsum board production line is provided for an embodiment of the present invention;

[0036] Figure 3 A structural schematic diagram of a condensate collection component in a steam pressure reducing device of a gypsum board production line is provided for an embodiment of the present invention;

[0037] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0038] Figure 5 A structural schematic diagram of another installation method of a drainage component in a steam pressure reducing device of a gypsum board production line is provided for an embodiment of the present invention;

[0039] The numbers in the figure represent the following:

[0040] 1. Steam transmission pipeline;

[0041] 2 partitions, 201 connecting pipes;

[0042] 3 coarse adjustment pressure reducing assembly, 4 fine adjustment pressure reducing assembly;

[0043] 5 pressure monitoring components, 501 front-end pressure monitor, 502 end pressure monitor;

[0044] 6 condensate collection assembly, 601 U-shaped tube, 602 piston block, 603 fixing ring, 604 spring, 605 water suction pipe;

[0045] 7 drainage assembly, 701 water collecting pipe, 702 first control valve, 703 second control valve. DETAILED DESCRIPTION

[0046] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0047] In order to solve the problem in the prior art that the steam output pressure used in calcining gypsum boards is unstable, resulting in a high defective rate of finished gypsum boards, the present application proposes the following solution:

[0048] like Figure 1 and Figure 2 As shown, the present invention provides a gypsum board production line steam pressure reducing device, comprising a steam delivery pipeline 1, a coarse adjustment pressure reducing component 3, a fine adjustment pressure reducing component 4, a pressure monitoring component 5 and a control module, and the coarse adjustment pressure reducing component 3, the fine adjustment pressure reducing component 4 and the pressure monitoring component 5 are all communicatively connected with the control module.

[0049] The coarse-adjustment pressure reducing assembly 3 can adjust the steam pressure in the steam delivery pipeline 1 over a large range, while the fine-adjustment pressure reducing assembly 4 can adjust the steam pressure in the steam delivery pipeline 1 more accurately over a small range.

[0050] The steam delivery pipeline 1 is used to deliver high-pressure steam, and the coarse-adjustment pressure-reducing assembly 3 and the fine-adjustment pressure-reducing assembly 4 are arranged along the high-pressure steam transmission direction in the steam delivery pipeline 1 .

[0051] The pressure monitoring assembly 5 includes a first pressure monitor and a second pressure monitor arranged at the steam inlet and steam outlet of the steam delivery pipeline 1, and the first pressure monitor and the second pressure monitor are used to monitor the high-pressure steam pressure at the steam inlet and steam outlet of the steam delivery pipeline in real time, respectively.

[0052] During the steam transmission process in the steam transmission pipeline 1, the pressure monitoring component 5 monitors the steam pressure at the steam inlet and steam outlet ends of the steam transmission pipeline 1 in real time, and feeds back the monitoring signal to the control module in real time. The control module first identifies the monitoring signal when the steam pressure at the steam inlet end of the steam transmission pipeline fluctuates.

[0053] If the degree of fluctuation of the steam pressure is low, the control module starts the fine-tuning pressure reducing component 4 to adjust the steam pressure in the steam conveying pipeline 1 so that the pressure at the steam outlet end of the steam conveying pipeline 1 remains stable.

[0054] If the degree of steam pressure fluctuation is medium, the control module starts the coarse-adjustment pressure reducing component 3 to adjust the steam pressure in the steam conveying pipeline 1, so that the steam pressure discharged from the coarse-adjustment pressure reducing component 3 to the fine-adjustment pressure reducing component 4 in the steam conveying pipeline 1 is the same as the steam pressure in the previous stage (or is within a similar error range), and the fine-adjustment pressure reducing component 4 remains unchanged, thereby reducing the operation frequency of each pressure reducing component in the steam conveying pipeline 1.

[0055] If the degree of steam pressure fluctuation is high, the control module first starts the coarse-adjustment pressure reducing component 3 to make a preliminary adjustment to the steam pressure in the steam conveying pipeline 1, and then further fine-tunes the steam pressure through the fine-adjustment pressure reducing component 4, so as to avoid overload operation of the pressure reducing components in the steam conveying pipeline 1 and improve the stability of the steam pressure at the steam outlet end of the steam conveying pipeline 1.

[0056] In order to achieve the regulating effect of the above-mentioned coarse-adjustment pressure reducing assembly 3 and the fine-adjustment pressure reducing assembly 4 on the steam pressure in the steam delivery pipeline 1, in this embodiment:

[0057] The coarse-adjustment pressure reducing assembly 3 includes a plurality of primary pressure reducing valves arranged along the steam delivery pipeline 1 , and the fine-adjustment pressure reducing assembly 4 includes a plurality of secondary pressure reducing valves arranged along the steam delivery pipeline 1 .

[0058] Among them, the steam pressure reduction range of the first-stage pressure reducing valve in the steam conveying pipeline 1 is greater than the steam pressure reduction range of the second-stage pressure reducing valve in the steam conveying pipeline 1, so that the coarse-adjustment pressure reducing component 3 can adjust the steam in the steam conveying pipeline 1 quickly and over a large range relative to the fine-adjustment pressure reducing component 4.

[0059] When the pressure of the high-pressure steam at the steam inlet end of the steam delivery pipeline 1 fluctuates to varying degrees, in order to enable the control module to selectively start the coarse adjustment pressure reducing component 3 and / or the fine adjustment pressure reducing component 4, and to maintain the stability of the high-pressure steam pressure at the steam outlet end of the delivery pipeline 1, in this embodiment:

[0060] The pressure monitoring assembly 5 also includes a third pressure monitor arranged on the rear side of the first pressure reducing valve and the second pressure reducing valve, and each third pressure monitor is communicatively connected to the control module. The third pressure monitor can monitor in real time the pressure reducing effect of the first pressure reducing valve and the second pressure reducing valve on the high-pressure steam in the steam delivery pipeline 1.

[0061] During the pressure reduction process, the control module calculates the range of steam pressure reduction in the steam delivery pipeline 1 by each first-level pressure reducing valve and the second-level pressure reducing valve through the third pressure monitor, and then determines the average pressure reduction range of the coarse-adjustment pressure reducing component 3 and the fine-adjustment pressure reducing component 4 for the high-pressure steam in the steam delivery pipeline 1, and sets the first-level pressure fluctuation difference and the second-level pressure fluctuation difference in the control module.

[0062] When the steam pressure fluctuation difference at the steam inlet end of the steam conveying pipeline 1 is less than the first-level pressure fluctuation difference, it is displayed that the steam pressure fluctuation in the steam conveying pipeline 1 is low. The control module can adjust the steam pressure in the steam conveying pipeline 1 by fine-tuning the pressure reducing component 4 so that the pressure load at the steam outlet end of the steam conveying pipeline 1 is marked.

[0063] When the steam pressure fluctuation difference at the steam inlet end of the steam conveying pipeline 1 is greater than the first-level pressure fluctuation difference and less than the second-level pressure fluctuation difference, it is displayed that the steam pressure fluctuation in the steam conveying pipeline 1 is medium, and the control module changes the steam pressure in the steam conveying pipeline 1 through the coarse-adjustment pressure reducing component 3, and makes the steam pressure discharged from the coarse-adjustment pressure reducing component 3 to the fine-adjustment pressure reducing component 4 in the steam conveying pipeline 1 the same as the steam pressure in the previous stage (or within a similar error range), and the fine-adjustment pressure reducing component 4 remains unchanged, so as to reduce the operation frequency of each pressure reducing component in the steam conveying pipeline 1.

[0064] When the steam pressure fluctuation difference at the steam inlet end of the steam delivery pipeline 1 is greater than the secondary pressure fluctuation difference, it is displayed that the steam pressure fluctuation in the steam delivery pipeline 1 is high, and the control module first

[0065] The control module first starts the coarse-adjustment pressure reducing component 3 to make a preliminary adjustment to the steam pressure in the steam conveying pipeline 1, and makes the remaining pressure difference to be adjusted smaller than the pressure regulating range of the fine-adjustment pressure reducing component 4, and then further fine-tunes the steam pressure through the fine-adjustment pressure reducing component 4, so as to avoid overload operation of the pressure reducing components in the steam conveying pipeline 1 and improve the stability of the steam pressure at the steam outlet end of the steam conveying pipeline 1.

[0066] In this embodiment, a plurality of partitions 2 are arranged in the steam delivery pipeline 1, and the partitions 2 divide the interior of the steam delivery pipeline 1 into a plurality of slow flow chambers, and the first-stage pressure reducing valve and the second-stage pressure reducing valve are respectively arranged in separate slow flow chambers.

[0067] A connecting pipe 201 connecting two adjacent slow-flow chambers is provided on the partition 2. The two adjacent connecting pipes 201 are staggered so that the steam flows in a spiral in the steam delivery pipeline 1. In this way, the flow velocity of the high-pressure steam in the steam delivery pipeline 1 is reduced by the partition and the connecting pipe 201.

[0068] When the high-pressure steam in the steam delivery pipeline 1 is decompressed over a large range by the coarse adjustment decompression component 3, due to the significant reduction in the pressure of the high-pressure steam, part of the high-pressure steam is liquefied into small droplets adsorbed on the inner wall of the steam delivery pipeline 1. In order to avoid the accumulation of condensed water in the steam delivery pipeline 1, in this embodiment:

[0069] A condensed water collecting assembly 6 is provided on the side wall of the steam delivery channel 1, and the condensed water collecting assembly 6 is used to collect the condensed water in the slow flow chamber where the primary pressure reducing valve is located.

[0070] In order to enable the condensate collection assembly 6 to achieve the above-mentioned effect, in this embodiment, refer to Figure 3 and Figure 4As shown, the condensate collection assembly 6 includes a U-shaped tube 601, in which a piston block 602 and a driving member are arranged. The piston block 602 can slide back and forth along the U-shaped tube 601, and the driving member is fixedly installed in the U-shaped tube 601 to drive the piston block 602 to slide in the U-shaped tube 601.

[0071] The two ends of the U-shaped tube 601 are connected to the same slow-flow chamber, and the two ends of the U-shaped tube 601 are respectively located on both sides of the first-stage pressure reducing valve. Due to the large pressure difference on both sides of the first-stage pressure reducing valve, under the action of the pressure difference, when the force exerted by the pressure difference on the piston block 602 is greater than the force exerted by the driving member on the piston block 602, the piston block 602 moves toward the rear side of the first-stage pressure reducing valve in the U-shaped tube 601; when the force exerted by the pressure difference on the piston block 602 is less than the force exerted by the driving member on the piston block 602, the piston block 602 moves toward the front end of the U-shaped tube 601, thereby sucking the condensed water on the rear side of the first-stage pressure reducing valve into the U-shaped tube 601.

[0072] Since the rear side of the first-stage pressure reducing valve remains relatively stable at all times, when the high-pressure steam pressure at the steam inlet end of the steam delivery pipeline 1 fluctuates, the pressure difference fluctuates accordingly. Under the action of the pressure difference and the driving member, the piston block 602 slides back and forth in the U-shaped tube 601, thereby intermittently sucking the condensed water in the slow flow chamber to prevent the condensed water from accumulating in the slow flow chamber.

[0073] Furthermore, both ends of the connecting pipe 201 extend to both sides of the partition 2, thereby preventing condensed water from accumulating in the slow flow chamber and then entering the next slow flow chamber from the connecting pipe 210, and multiple thin filament hoses are connected to the inner wall of the slow flow chamber at one end of the U-shaped tube 601 located on the rear side of the first-level pressure reducing valve, thereby expanding the suction range and suction efficiency of the U-shaped tube 601 on the condensed water droplets on the inner wall of the steam delivery pipe 1.

[0074] In this embodiment, refer to Figure 4 As shown, in this embodiment, the driving member includes a fixing ring 603 fixedly connected in the U-shaped tube 601, a spring 604 is connected between the fixing ring 603 and the piston block 602, and the piston block 602 is driven to always compress the spring 604 under the action of the pressure difference.

[0075] In order to keep the condensate collection component 6 collecting the condensate in the slow flow chamber continuously, it is necessary to discharge the condensate collected by the condensate collection component 6 to the outside at regular intervals. For this purpose, in this embodiment, a drainage component 7 is connected to the U-shaped tube 601, and the drainage component 7 is used to isolate and discharge the condensate collected in the U-shaped tube 601.

[0076] In this embodiment, refer to Figure 4As shown, the drainage assembly 7 includes a water collecting pipe 701 connected to the U-shaped pipe 601, and the water collecting pipe 701 is kept vertical so that the condensed water in the U-shaped pipe 601 can flow into the water collecting pipe 701 under its own gravity. Specifically, according to whether the steam delivery pipeline 1 is vertically or horizontally arranged, the water collecting pipe 701 is adaptively installed (refer to Figure 5 As shown, this is the installation direction of the water collecting pipe 701 when the steam delivery pipeline 1 is installed horizontally).

[0077] A first control valve 702 and a second control valve 703 are installed on the water collecting pipe 701 along its length direction. When in use, the first control valve 702 and the second control valve 703 are both in a closed state, and the condensed water collected by the condensed water collection component 6 is collected in the water collecting pipe 701 until the condensed water in the water collecting pipe 701 reaches a certain amount. The first control valve 702 is opened, and the condensed water enters the bottom of the water collecting pipe 701. Thereafter, the first control valve 702 is closed and the second control valve 703 is opened, so that the condensed water in the water collecting pipe 701 can be discharged and the steam delivery pipe 1 can be kept sealed to avoid leakage of high-pressure steam.

[0078] A gypsum board production line steam pressure reduction control method comprises the following steps:

[0079] S100, transporting high-pressure steam through the steam transport pipeline 1;

[0080] S200, monitoring the steam pressure at the steam inlet and steam outlet of the steam delivery pipeline 1 in real time through the pressure monitoring component 5;

[0081] S300, the control module starts the coarse adjustment pressure reducing component 3 and / or the fine adjustment pressure reducing component 4 according to the monitoring feedback of the pressure monitoring component 5, so as to adjust the steam pressure inside the steam delivery pipeline 1, so that the steam pressure load at the steam outlet end of the steam delivery pipeline 1 is used in a standard manner;

[0082] S400, using the condensate collection component 6 to collect the condensate generated in the steam delivery pipeline 1, and draining the collected condensate through the drainage component 7 at a regular interval.

[0083] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A steam pressure reducing device for a gypsum board production line, characterized in that: The invention comprises a steam delivery pipeline (1), a coarse-adjustment pressure reducing assembly (3), a fine-adjustment pressure reducing assembly (4), a pressure monitoring assembly (5) and a control module, wherein the coarse-adjustment pressure reducing assembly (3), the fine-adjustment pressure reducing assembly (4) and the pressure monitoring assembly (5) are all communicatively connected with the control module; The steam delivery pipeline (1) is used to deliver high-pressure steam, and the coarse-adjustment pressure-reducing assembly (3) and the fine-adjustment pressure-reducing assembly (4) are arranged along the high-pressure steam transmission direction in the steam delivery pipeline (1); The pressure monitoring assembly (5) comprises a first pressure monitor and a second pressure monitor arranged at the steam inlet end and the steam outlet end of the steam delivery pipeline (1); The pressure monitoring component (5) feeds back a monitoring signal to the control module, and the control module identifies the signal and sends instructions to the coarse-adjustment pressure reducing component (3) and the fine-adjustment pressure reducing component (4) to change the pressure of the steam in the steam delivery pipeline (1).

2. A gypsum board production line steam pressure reducing device according to claim 1, characterized in that: The coarse-adjustment pressure reducing assembly (3) comprises a plurality of primary pressure reducing valves arranged along the steam delivery pipeline (1), and the fine-adjustment pressure reducing assembly (4) comprises a plurality of secondary pressure reducing valves arranged along the steam delivery pipeline (1); The pressure reduction range of the steam in the steam delivery pipeline (1) by the first-stage pressure reducing valve is greater than the pressure reduction range of the steam in the steam delivery pipeline (1) by the second-stage pressure reducing valve.

3. The steam pressure reducing device for a gypsum board production line according to claim 2, characterized in that: The pressure monitoring assembly (5) further comprises a third pressure monitor arranged at the rear side of the primary pressure reducing valve and the secondary pressure reducing valve, and each of the third pressure monitors is communicatively connected to the control module; The control module calculates the range of steam pressure reduction in the steam delivery pipeline (1) by each of the first pressure reducing valve and the second pressure reducing valve through the third pressure monitor; When the steam pressure fluctuation difference at the steam inlet end of the steam delivery pipeline (1) is less than a set value, the control module changes the steam pressure in the steam delivery pipeline (1) through the fine-tuning pressure reducing component (4); When the steam pressure fluctuation difference at the steam inlet end of the steam delivery pipeline (1) is greater than a set value, the control module changes the steam pressure in the steam delivery pipeline (1) through the coarse adjustment pressure reducing component (3).

4. The steam pressure reducing device for a gypsum board production line according to claim 3, characterized in that: A plurality of partitions (2) are arranged in the steam delivery pipeline (1), the partitions (2) divide the interior of the steam delivery pipeline (1) into a plurality of slow-flow chambers, and the first-stage pressure reducing valve and the second-stage pressure reducing valve are respectively arranged in separate slow-flow chambers; A connecting pipe (201) for connecting two adjacent slow-flow chambers is arranged on the partition plate (2), and the two adjacent connecting pipes (201) are arranged in a staggered manner so that the steam flows in a spiral in the steam delivery pipeline (1).

5. The steam pressure reducing device for a gypsum board production line according to claim 4, characterized in that: A condensed water collection component (6) is provided on the side wall of the steam delivery channel (1), and the condensed water collection component (6) is used to collect condensed water in the slow flow chamber where the primary pressure reducing valve is located.

6. The steam pressure reducing device for a gypsum board production line according to claim 5, characterized in that: The condensate collection assembly (6) comprises a U-shaped tube (601), a piston block (602) and a driving member are arranged inside the U-shaped tube (601), the piston block (602) is capable of sliding back and forth along the U-shaped tube (601), and the driving member is fixedly installed inside the U-shaped tube (601) and is used to drive the piston block (602) to slide inside the U-shaped tube (601); The two ends of the U-shaped tube (601) are connected to the same slow-flow chamber, and the two ends of the U-shaped tube (601) are respectively located on both sides of the first-stage pressure reducing valve, so that the piston block (602) can slide in the U-shaped tube (601) under the action of the pressure difference at both ends of the U-shaped tube (601).

7. The steam pressure reducing device for a gypsum board production line according to claim 6, characterized in that: The driving member comprises a fixing ring (603) fixedly connected inside the U-shaped tube (601), and a spring (604) is connected between the fixing ring (603) and the piston block (602).

8. The steam pressure reducing device for a gypsum board production line according to claim 6, characterized in that: The U-shaped tube (601) is connected to a drainage component (7), and the drainage component (7) is used to isolate and discharge condensed water collected in the U-shaped tube (601).

9. The steam pressure reducing device for a gypsum board production line according to claim 8, characterized in that: The drainage assembly (7) comprises a water collecting pipe (701) connected to the U-shaped pipe (601), and the water collecting pipe (701) is kept vertically so that the condensed water in the U-shaped pipe (601) can flow into the water collecting pipe (701) under the action of its own gravity; A first control valve (702) and a second control valve (703) are installed on the water collecting pipe (701) along its length direction.

10. A method for controlling steam decompression of a gypsum board production line, characterized in that: A gypsum board production line steam decompression device according to claims 1-9, comprising the following steps: S100, transporting high-pressure steam through a steam transport pipeline (1); S200, monitoring the steam pressure at the steam inlet and steam outlet of the steam delivery pipeline (1) in real time through a pressure monitoring component (5); S300, the control module starts the coarse pressure reducing component (3) and / or the fine pressure reducing component (4) according to the monitoring feedback of the pressure monitoring component (5) to adjust the steam pressure inside the steam conveying pipeline (1) so that the steam pressure load at the steam outlet end of the steam conveying pipeline (1) meets the standard; S400, using a condensate collection component (6) to collect condensate generated in the steam delivery pipeline (1), and draining the collected condensate regularly through a drainage component (7).

Images