Dehumidification device for boiler steam blowout pipeline

Abstract

The utility model relates to a dehumidification device for a steam blowout pipeline of a boiler, and relates to the technical field of steam boilers. The utility model relates to a dehumidification device for a steam blowout pipeline of a boiler. A first pipeline is communicated with a safety valve; the top of the liquid accumulation tank is communicated with the first pipeline, an outlet is formed in the bottom of the liquid accumulation tank, a valve body is arranged at the outlet, a piezoelectric switch is further arranged in the liquid accumulation tank, and the piezoelectric switch is electrically connected with the valve body; the liquid level sensor is a lever type liquid level meter rotationally installed in the liquid accumulation tank, when the height of the liquid level in the liquid accumulation tank reaches or exceeds a threshold value height, the liquid level sensor rotates till the piezoelectric switch is pressed, the piezoelectric switch generates an electric signal to control the valve body to be opened, and the threshold value height is lower than the height of the first pipeline. When condensate water in the liquid accumulation tank rises, the piezoelectric switch is pressed through rotation of the liquid level sensor, so that the valve body is controlled to be opened to complete automatic drainage work, and the risk that the safety valve is corroded by the condensate water is reduced.

Description

Technical Field

[0001] This utility model relates to the field of steam boiler technology, and in particular to a dehumidification device for boiler steam venting pipeline. Background Technology

[0002] The heat source for the low-temperature multi-effect distillation unit comes from a steam boiler. The steam boiler heats the water inside the boiler by burning natural gas, turning it into steam for use by the low-temperature multi-effect distillation system. To improve the safety of the steam boiler, a venting line is connected to the steam boiler, and a safety valve is installed on the venting line. By periodically opening the safety valve, gas in the venting line is released, enabling periodic venting tests.

[0003] Because the venting pipeline is connected to the steam boiler, there is a lot of moisture in the venting pipeline, which often leads to water accumulation. Prolonged water accumulation may cause the valve core of the safety valve to rust. Utility Model Content

[0004] This utility model provides a dehumidification device for boiler steam venting pipeline, which is used to prevent condensate in the venting pipeline from corroding the safety valve and extending the service life of the safety valve.

[0005] This utility model provides a dehumidification device for boiler steam venting pipelines, comprising:

[0006] The first pipeline has one end connected to the boiler's steam pipeline and the other end connected to a safety valve.

[0007] A liquid collection tank is located between a steam pipeline and a safety valve, with its top connected to the first pipeline. An outlet is located at the bottom of the tank, and a valve body is installed at the outlet. A piezoelectric switch is also installed inside the tank and is electrically connected to the valve body.

[0008] A liquid level sensor, which is a lever-type liquid level gauge rotatably installed inside the liquid collection tank, is configured such that when the liquid level in the liquid collection tank reaches or exceeds a threshold height, it rotates to press the piezoelectric switch, causing the piezoelectric switch to generate an electrical signal to control the valve body to open, wherein the threshold height is lower than the height of the first pipeline.

[0009] In one embodiment, the liquid level sensor includes a rod, the fulcrum of which is rotatably connected to the liquid collection tank. A float is installed at a first position of the rod, and a clamping part for pressing the piezoelectric switch is installed at a second position of the rod. The lever arm length of the float relative to the fulcrum is greater than the lever arm length of the clamping part relative to the fulcrum.

[0010] In one embodiment, the first position and the second position are located on opposite sides of the fulcrum position.

[0011] In one embodiment, the rod body is provided with mounting holes;

[0012] The rod body includes a connecting shaft rotatably connected to the liquid collection tank. The connecting shaft includes a first positioning part, a rotating fitting part, and a second positioning part connected sequentially along its axial direction. The connecting shaft is inserted into the mounting hole so that the rotating fitting part rotates with the mounting hole. Both the first positioning part and the second positioning part are fitted with sealing rings, and the outer circumferential surface of the sealing rings is sealed to the hole wall of the mounting hole.

[0013] In one embodiment, the rotating fitting part is fitted with a bearing, and the rotating fitting part is rotatably mounted in the mounting hole through the bearing. The sealing ring installed in the first positioning part abuts against one side of the bearing, and the sealing ring installed in the second positioning part abuts against the other side of the bearing.

[0014] In one embodiment, the device further includes an alarm device electrically connected to the piezoelectric switch, wherein the piezoelectric switch is configured to control the alarm device to emit an alarm signal when the liquid level sensor presses against the piezoelectric switch.

[0015] In one embodiment, the alarm signal includes at least one of an audio signal, an optical signal, and a communication signal.

[0016] In one embodiment, the height of the piezoelectric switch is higher than the threshold height.

[0017] In one embodiment, the triggering force of the piezoelectric switch is less than 0.5N.

[0018] In one embodiment, the piezoelectric switch has a waterproof rating of IP68.

[0019] Compared with existing technologies, the advantages of this invention are as follows: a condensate collection tank is connected to the discharge pipeline, and the top of the condensate collection tank is connected to the bottom of the discharge pipeline. When condensate is generated in the discharge pipeline, it will flow into the condensate collection tank under gravity, preventing it from flowing to the safety valve connected to the discharge pipeline. Because a piezoelectric switch is installed in the condensate collection tank, and a lever-type level gauge with a level sensor is installed inside the tank, the level sensor measures the liquid level in the tank. When the liquid level reaches a threshold height, the level sensor of the lever-type level gauge rotates and presses against the piezoelectric switch, causing the piezoelectric switch to generate an electrical signal to open the valve, thus discharging the condensate from the condensate collection tank and preventing it from flowing to the safety valve. In other words, this application enables automatic drainage of condensate from the condensate collection tank, reducing the risk of the safety valve being corroded by condensate. Attached Figure Description

[0020] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the structure of the boiler steam venting pipeline dehumidification device in an embodiment of this utility model when the liquid level in the liquid collection tank reaches the threshold height.

[0022] Figure 2 This is a schematic diagram of the cooperation between the liquid level sensor and the connecting shaft in an embodiment of this utility model;

[0023] Figure 3 This is a front view structural diagram of the connecting shaft in an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the main structure of the piezoelectric switch in an embodiment of this utility model.

[0025] Figure label:

[0026] 100. First pipeline; 110. Inlet end; 120. Outlet end;

[0027] 200. Safety valve;

[0028] 300. Liquid collection tank; 310. Outlet; 320. Connecting shaft; 321. First positioning part; 322. Rotating mating part; 323. Second positioning part; 324. Threaded column;

[0029] 400. Valve body;

[0030] 500. Piezoelectric switch;

[0031] 600. Liquid level sensor; 610. Rod; 611. Mounting hole; 620. Float; 630. Clamping part;

[0032] 700. Alarm device;

[0033] 800, sealing ring. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] See Figures 1 to 4 As shown, this application provides a dehumidification device for a boiler steam venting pipeline, which includes: a first pipeline 100, one end (air inlet 110) for connecting to the boiler's steam pipeline, and the other end (venting end 120) connected to a safety valve 200.

[0036] A liquid collection tank 300 is located between the steam pipeline and the safety valve 200, and the top of the liquid collection tank 300 is connected to the first pipeline 100. An outlet 310 is provided at the bottom of the liquid collection tank 300, and a valve body 400 is provided at the outlet 310. A piezoelectric switch 500 is also provided inside the liquid collection tank 300, and the piezoelectric switch 500 is electrically connected to the valve body 400.

[0037] A liquid level sensor 600 is a lever-type liquid level gauge rotatably mounted inside the liquid collection tank 300. The liquid level sensor 600 is electrically connected to the valve body 400, and the liquid level sensor 600 is configured to press a piezoelectric switch 500 when it detects that the liquid level in the liquid collection tank 300 reaches or exceeds a threshold height, so that the piezoelectric switch 500 generates an electrical signal to control the valve body 400 to open. The threshold height is lower than the height of the first pipeline 100.

[0038] In other words, by using the first pipeline 100 as a venting pipeline and connecting it to the safety valve 200 at the venting end 120 of the first pipeline 100, the gas in the first pipeline 100 can be released when the safety valve 200 is opened, thus completing the venting test. Furthermore, since a liquid collection tank 300 is connected to the bottom of the first pipeline 100, when the water vapor in the venting pipeline liquefies, the liquefied water vapor will flow into the liquid collection tank 300, reducing the risk of liquid accumulating in the first pipeline 100.

[0039] Because an outlet 310 is provided at the bottom of the condensate tank 300, and a valve body 400 is provided at the outlet 310, the condensate in the condensate tank 300 can be discharged by periodically opening the valve body 400, preventing the condensate in the condensate tank 300 from flooding the first pipeline 100 and corroding the safety valve 200. At the same time, a liquid level sensor 600 is also provided in the condensate tank 300. The liquid level sensor 600 can measure the liquid level in the condensate tank 300. When the liquid level in the condensate tank 300 rises to the threshold height, the liquid level sensor 600 presses the piezoelectric switch 500. Under the action of the pressing force, the piezoelectric switch 500 generates an electrical signal to control the valve body 400 to open, so that the bottom outlet 310 of the condensate tank 300 is opened, and the condensate in the condensate tank 300 is discharged.

[0040] In this application, the level sensor 600 is a lever-type level gauge, and the valve body 400 is controlled by pressing the piezoelectric switch 500 against the level sensor 600. The lever-type level gauge allows the float to float synchronously with the liquid level as the liquid level changes, and the float's movement drives the level sensor 600 to rotate relative to the accumulator tank 300. When the liquid level reaches a threshold height, the float floats to that height and rotates the level sensor relative to the accumulator tank 300 until it presses the piezoelectric switch 500 against it. At this point, the buoyancy of the rising liquid level is converted into a pressing force on the piezoelectric switch 500. Under this pressing force, the switch generates an electrical signal to control the valve body 400, opening the outlet 310 of the accumulator tank 300 and discharging the condensate from the accumulator tank 300.

[0041] Compared to capacitive, pressure, ultrasonic, or photoelectric level gauges that require a power supply, lever-type level gauges are mechanical level gauges that do not require an external power supply or power cord. This makes installation simpler, lower in cost, less prone to failure, and more stable. Compared to float-type level gauges, which are also mechanical level gauges, lever-type level gauges connect to the liquid collection tank 300 via a rotational engagement. This eliminates the need for guide channels or rails for the float or slider, preventing float jamming due to foreign objects adhering to these channels or rails. Furthermore, because the mating surfaces are not exposed to the external environment, lever-type level gauges have a longer service life and a lower failure rate within the high-temperature, high-humidity liquid collection tank 300.

[0042] In some implementations, the sensing side of the piezoelectric switch 500 ( Figure 4 The upper side of the liquid level sensor 600 extends into the liquid collection tank 300 so that the liquid level sensor 600 inside the liquid collection tank 300 can contact and press against the piezoelectric switch 500. The other side of the piezoelectric switch 500 ( Figure 4The lower side of the liquid level sensor 600 extends out of the liquid collection tank 300 and is electrically connected to the valve body 400 via a wire. When the liquid level sensor 600 presses against the piezoelectric switch 500, causing the switch to generate an electrical signal, the piezoelectric switch 500 controls the valve body 400 to open, discharging the condensate from the liquid collection tank 300.

[0043] In some implementations, the liquid level sensor 600 includes a rod 610, the fulcrum of which is rotatably connected to the liquid collection tank 300. A float 620 is mounted at a first position of the rod 610, and a clamping part 630 for clamping the piezoelectric switch 500 is mounted at a second position of the rod 610. The lever arm length of the float 620 relative to the fulcrum position is (…). Figure 1 L1) is greater than the lever arm length of the clamping part 630 relative to the fulcrum position. Figure 1 L2 in the middle.

[0044] In other words, when the float 620 moves up and down under the action of buoyancy, it not only drives the rod 610 to rotate relative to the fulcrum, but also drives the clamping part 630 to rotate, thus triggering the piezoelectric switch 500. Since the lever arm length of the float 620 is greater than the lever arm length of the clamping part 630, when the clamping part 630 clamps the piezoelectric switch 500, the clamping force on the piezoelectric switch 500 is greater than the upward lifting force of the float 620 on the rod 610.

[0045] When the height of the liquid level in the liquid collection tank 300 is lower than the threshold height, the height of the clamping part 630 is higher than the height of the piezoelectric switch 500, and the clamping part 630 is separated from the piezoelectric switch 500. At this time, the float 620 is balanced by its own weight and the buoyancy of the liquid. That is to say, the buoyancy of the float 620 is equal to the sum of its weight and the downward pressure brought by the weight of the clamping part 630.

[0046] As the liquid level further drives the float 620 upward, the clamping part 630 eventually presses against the piezoelectric switch 500. At this time, the height of the clamping part 630 is limited by the height of the piezoelectric switch 500, preventing the rod 610 from rotating further (as shown in the figure, preventing clockwise rotation), thus preventing the float 620 from rising further. The rise in the liquid level further increases the buoyancy of the float 620, increasing the pressure of the clamping part 630 on the piezoelectric switch 500, causing the piezoelectric switch 500 to generate an electrical signal to open the control valve 400.

[0047] The limiting function of the clamping part 630 prevents the height of the float 620 from rising synchronously with the rise of the liquid level, thus increasing the depth to which the float 620 is submerged in the liquid. This increases the buoyancy of the float 620, thereby increasing the clamping force of the clamping part 630 on the piezoelectric switch 500, ensuring that the piezoelectric switch 500 can generate an electrical signal to control the opening of the valve body 400.

[0048] It is understandable that the lever arm length of the clamping part 630 relative to the fulcrum can be adjusted by adjusting the position of the clamping part 630 on the rod 610 and the position of the clamping switch. Figure 1 The clamping force (L2) can be adjusted. In some implementations, multiple holes can be provided on the rod 610 for connecting floats, and the lever arm length of the float 620 can be adjusted by installing the float 620 at different holes. Similarly, multiple holes can be provided on the rod 610 for installing the clamping part 630, and the lever arm length of the clamping part 630 can be adjusted by installing the clamping part 630 at different holes. By adjusting the length of the lever arm, the clamping force can be adjusted without changing the float 620, thus meeting the triggering force requirements of the piezoelectric switch.

[0049] According to the formula for calculating buoyancy, Fbuoyancy = ρliquidgVdisplaced (where Fbuoyancy is the buoyant force acting on the floating body at 62°, and ρliquid is the density of the liquid, in kg / m2),... 3 g is a constant, the ratio of gravity to mass, taken as g = 9.8 N / kg, but can be roughly taken as 10 N / kg for calculations; Vdisplaced represents the volume of liquid displaced, in cubic meters (m³). 3 As can be seen, when the liquid density remains constant, the magnitude of buoyancy is positively correlated with the volume of liquid displaced by the object. Since the volume of the float 620 is limited, the maximum volume of liquid it can displace is equal to the volume of the float 620 itself. Therefore, the maximum buoyancy of the float 620 is fixed. To increase the maximum buoyancy of the float 620, a larger volume float 620 needs to be selected. If a sliding level gauge is used as the level sensor 600 in this application, a float 620 with a larger volume is required to achieve the target buoyancy to press the piezoelectric switch 500. However, by using a lever-type level gauge as the level sensor 600, the lever effect can reduce the buoyancy requirement of the float 620, thereby reducing the volume of the float 620 and lowering its cost.

[0050] See Figures 1 to 3 As shown, in some implementations, the rod body 610 is provided with a mounting hole 611. The rod body 610 includes a connecting shaft 320 that is rotatably connected to the liquid collection tank 300. The connecting shaft 320 includes a first positioning part 321, a rotating engagement part 322, and a second positioning part 323 that are connected sequentially along its axial direction. The connecting shaft 320 is inserted into the mounting hole 611 so that the rotating engagement part 322 is rotatably engaged with the mounting hole 611. Both the first positioning part 321 and the second positioning part 323 are fitted with sealing rings 800. The outer peripheral surface of the sealing rings 800 is fitted and sealed to the hole wall of the mounting hole 611.

[0051] In other words, by setting sealing rings 800 on both sides of the rotating mating part 322, the water vapor in the liquid collection tank 300 is prevented from corroding the rotating mating part 322, thus extending the service life of the mating surface of the rotating mating part 322.

[0052] In some implementations, the radial dimensions of the first positioning part 321, the rotating engagement part 322, and the second positioning part 323 can be set to be equal. During use, a sealing ring 800, a bearing, and another sealing ring 800 are sequentially installed on the connecting shaft 320. The connecting shaft 320 with the bearing is then inserted into the mounting hole 611 of the rod body 610, allowing the bearing to engage with the hole wall of the mounting hole 611. In other words, the rotating engagement is achieved through the bearing, making the rotation of the rod body 610 relative to the connecting shaft 320 smoother. The sealing rings 800 on both sides of the bearing provide a seal, preventing excessive moisture from contacting and corroding the bearing, thus extending its service life.

[0053] Understandably, in some implementations, the radial dimensions of the first positioning part 321 and the second positioning part 323 can be set smaller than the dimension of the rotating mating part 322. One sealing ring 800 is fitted over the first positioning part 321, and another sealing ring 800 is fitted over the second positioning part 323. That is, the rotating mating part 322 directly fits against the wall of the mounting hole 611, achieving a rotating fit between the connecting shaft 320 and the mounting hole 611. Sealing rings 800 are provided on both opposite sides of the rotating mating part 322 in the axial direction, reducing the risk of moisture contact with the rotating mating surface, reducing the risk of jamming of the rotating mating part 322, and extending the service life of the rotating mating part 322.

[0054] To reduce the installation difficulty of the bearing and the sealing ring 800, the connection between the connecting shaft 320 and the liquid collection tank 300 can be made detachable. When installing the sealing ring 800, first remove the connecting shaft 320 from the liquid collection tank 300, then place the bearing on the connecting shaft 320, and then fit the sealing ring 800 onto both ends of the connecting shaft 320, ensuring that both sides of the bearing have a sealing ring 800. Alternatively, the end of the connecting shaft 320 connected to the liquid collection tank 300 can be configured as a threaded post 324 structure, with a nut welded into the liquid collection tank 300 or a threaded hole drilled in it. By threading the end of the connecting shaft 320 with the threaded post 324 to the liquid collection tank 300, the detachable connection between the connecting shaft 320 and the liquid collection tank 300 is achieved.

[0055] See Figure 1 As shown, in some implementations, the boiler steam venting pipeline dehumidification device also includes an alarm device 700, which is electrically connected to a piezoelectric switch 500. The piezoelectric switch 500 is configured to control the alarm device 700 to issue an alarm signal when the liquid level sensor 600 presses against the piezoelectric switch 500.

[0056] In some implementations, the piezoelectric switch 500 extends out of the liquid tank 300 and is electrically connected to the alarm device 700 via a wire. When the piezoelectric switch 500 is pressed by the liquid level sensor 600 and generates an electrical signal, the electrical signal will control the alarm device 700 to issue an alarm signal so that the user can know that the liquid level in the liquid tank 300 has reached the threshold height.

[0057] In some implementations, the alarm signal includes at least one of sound, light, and communication signals. That is, a horn capable of emitting sound signals can be used as the alarm device 700, as can a warning light capable of emitting light, or a communication device capable of transmitting communication information (such as using a mobile phone to make an alarm call, or sending alarm information to a designated device via a network terminal). It is understood that the alarm device 700 can be a device that emits a single alarm signal, or a device capable of emitting multiple alarm signals.

[0058] See Figure 1 As shown, the height of the piezoelectric switch 500 is higher than the threshold height. By setting the height of the piezoelectric switch 500 higher than the threshold height, the piezoelectric switch 500 can be prevented from being immersed in the condensate when the liquid level of the condensate in the condensate tank 300 reaches the threshold height.

[0059] In some implementations, the triggering force of the piezoelectric switch 500 is less than 0.5N. The triggering force of the piezoelectric switch 500 refers to the minimum pressure required for the piezoelectric switch 500 to generate an electrical signal. In this application, by selecting a piezoelectric switch 500 with a triggering force of less than 0.5N, the difficulty for the liquid level sensor 600 to trigger the piezoelectric switch 500 is reduced. This allows the pressure switch to sensitively generate an electrical signal under the pressure of the pressure part 630 when the float floats to the threshold height, thereby completing the control of the valve body 400 and the alarm device 700.

[0060] See Figure 4 As shown, in some implementations, the piezoelectric switch 500 has a waterproof rating of IP68. Currently, the waterproof performance of the piezoelectric switch 500 can be divided into IP65, IP66, IP67, and IP68. Among them, the IP66 piezoelectric switch 500 can operate under spray water and can withstand heavy rain. The IP67 piezoelectric switch 500 can be submerged in water for a short time and is often used as a control switch for underwater swimming pools. The IP68 piezoelectric switch 500 can be submerged in water for extended periods and can be used in the high temperature and humidity environment of a liquid tank 300.

[0061] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A dehumidification device for boiler steam venting pipeline, characterized in that, It includes: The first pipeline has one end connected to the boiler's steam pipeline and the other end connected to a safety valve. A liquid collection tank is located between a steam pipeline and a safety valve, with its top connected to the first pipeline. An outlet is located at the bottom of the tank, and a valve body is installed at the outlet. A piezoelectric switch is also installed inside the tank and is electrically connected to the valve body. A liquid level sensor, which is a lever-type liquid level gauge rotatably installed inside the liquid collection tank, is configured such that when the liquid level in the liquid collection tank reaches or exceeds a threshold height, it rotates to press the piezoelectric switch, causing the piezoelectric switch to generate an electrical signal to control the valve body to open, wherein the threshold height is lower than the height of the first pipeline.

2. The boiler steam venting pipeline dehumidification device according to claim 1, characterized in that, The liquid level sensor includes a rod, the fulcrum of which is rotatably connected to the liquid collection tank. A float is installed at a first position of the rod, and a clamping part for pressing the piezoelectric switch is installed at a second position of the rod. The lever arm length of the float relative to the fulcrum is greater than the lever arm length of the clamping part relative to the fulcrum.

3. The boiler steam venting pipeline dehumidification device according to claim 2, characterized in that, The first position and the second position are located on opposite sides of the fulcrum position.

4. The boiler steam venting pipeline dehumidification device according to claim 2, characterized in that... ； The rod body is provided with mounting holes; The rod body includes a connecting shaft rotatably connected to the liquid collection tank. The connecting shaft includes a first positioning part, a rotating fitting part, and a second positioning part connected sequentially along its axial direction. The connecting shaft is inserted into the mounting hole so that the rotating fitting part rotates with the mounting hole. Both the first positioning part and the second positioning part are fitted with sealing rings, and the outer circumferential surface of the sealing rings is sealed to the hole wall of the mounting hole.

5. The boiler steam venting pipeline dehumidification device according to claim 4, characterized in that... ； The rotating fitting part is fitted with a bearing, and the rotating fitting part is rotatably mounted in the mounting hole through the bearing. The sealing ring installed in the first positioning part abuts against one side of the bearing, and the sealing ring installed in the second positioning part abuts against the other side of the bearing.

6. The boiler steam venting pipeline dehumidification device according to claim 1 or 2, characterized in that, Also includes: An alarm device is electrically connected to the piezoelectric switch, and the piezoelectric switch is configured to control the alarm device to emit an alarm signal when the liquid level sensor presses against the piezoelectric switch.

7. The boiler steam venting pipeline dehumidification device according to claim 6, characterized in that, The alarm signal includes at least one of sound signal, light signal and communication signal.

8. The boiler steam venting pipeline dehumidification device according to claim 1 or 2, characterized in that, The height of the piezoelectric switch is higher than the threshold height.

9. The dehumidification device for boiler steam venting pipeline according to claim 1 or 2, characterized in that, The triggering force of the piezoelectric switch is less than 0.5N.

10. The boiler steam venting pipeline dehumidification device according to claim 1 or 2, characterized in that, The piezoelectric switch has a waterproof rating of IP68.

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