A pipeline water seal device and a sealing system for a pure water tank

Abstract

The present invention relates to the technical field of pure water treatment systems, and discloses a pipeline-type water seal device and a sealing system for a pure water tank. The pipeline-type water seal device includes a positive pressure protection component, which includes a first pipeline and a second pipeline connected in parallel, and an air outlet pipe. The first pipeline is connected to the overflow port of the pure water tank, the second pipeline has an air outlet at the top, the first pipeline and the second pipeline contain a first sealing liquid, and the second pipeline is provided with a liquid discharge port to form a discharge liquid level; the air outlet pipe is connected to the first pipeline at the top, and has an air outlet at the bottom, which extends into the first sealing liquid; and a vacuum breaking protection component, which includes a third pipeline and a vacuum breaking pipeline. The vacuum breaking pipeline has a top connected to the atmosphere and a gas outlet at the bottom, which is connected to the third pipeline, which is connected to the first pipeline, and contains a second sealing liquid, so that a second preset pressure is formed between the liquid level of the second sealing liquid and the gas outlet. The pipeline-type water seal device is easy to process and assemble, occupies little space, and is easy to change and modify.

Description

Technical Field

[0001] The present invention relates to the technical field of pure water treatment systems, and in particular to a pipeline type water sealing device and a sealing system of a pure water tank. Background Art

[0002] With the development of the electronics and semiconductor industries, the use of pure water is becoming more and more widespread, and the scale of pure water systems is also becoming more diversified, with various types of pure water systems constantly emerging. With the development of the ultrapure water industry, measures to ensure the quality of pure water are becoming increasingly important. As a water quality assurance measure for pure water tanks, deionized water tanks, and high-purity water tanks, the application of nitrogen sealing systems is gradually becoming popular. In order to avoid or reduce the additional operating costs caused by abnormal nitrogen loss and to ensure the effectiveness of nitrogen in protecting water quality, water seals or other nitrogen sealing methods are required.

[0003] However, the commonly used water seal device at present is a customized water seal barrel. Both positive and negative pressure protection are confirmed once, and then processed and manufactured according to the confirmation results. The cost is relatively high. If the on-site nitrogen seal pressure use conditions change, a new nitrogen seal barrel can only be remade, or the on-site installed interface does not correspond accurately. The interface size and orientation of the water seal barrel cannot be modified on-site, and it is difficult to change the interface size and orientation during on-site installation. Therefore, the current water seal barrel has poor applicability and poor flexibility of use, which can easily lead to cost losses. Summary of the Invention

[0004] The present invention discloses a pipeline water seal device and a sealing system for a pure water tank. The pipeline water seal device can alleviate the positive pressure or negative pressure in the pure water tank when excessive positive pressure or negative pressure occurs in the pure water tank, thereby avoiding rupture and damage of the pure water tank and reducing cost losses of production equipment. The pipeline water seal device in this embodiment is formed by pipeline assembly, which is easy to process and easy to assemble. All connecting parts are exposed to the outside, which is convenient for inspection, reliable for connection, and highly safe. It also occupies less space and has a low cost. Moreover, since the components are pipe fittings, the pipe fitting sizes can be selected or modified according to on-site test data for assembly, and changes and modifications are also convenient, with high flexibility in use.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pipeline water seal device, comprising: a positive pressure protection component and a vacuum breaking protection component;

[0007] The positive pressure protection component includes:

[0008] A first pipe and a second pipe are arranged in parallel, the bottom of the first pipe is connected to the bottom of the second pipe, the top of the first pipe is used to communicate with the overflow port of the pure water tank, the top of the second pipe has an exhaust port, the first pipe and the second pipe contain a first sealing liquid for liquid sealing, and the second pipe is provided with a drain port to form a discharge liquid level of the first sealing liquid in the second pipe;

[0009] an air outlet pipe, wherein the top end of the air outlet pipe is connected to the first pipe, the port at the bottom end of the air outlet pipe forms an air outlet, the bottom end of the air outlet pipe extends into the second pipe along the top end of the second pipe, and the air outlet extends into the first sealing liquid, the air outlet is lower than the discharge liquid level, and a first preset pressure is formed between the air outlet and the discharge liquid level;

[0010] The vacuum breaking protection assembly comprises:

[0011] A third pipeline and a vacuum breaking pipeline, the top of the vacuum breaking pipeline is connected to the atmosphere, and the port at the bottom of the vacuum breaking pipeline forms an air supply port, the air supply port is connected to the third pipeline, and the third pipeline is connected to the first pipeline. A preset amount of second sealing liquid is contained in the third pipeline, so that a second preset pressure is formed between the liquid level of the second sealing liquid in the third pipeline and the air supply port. When the pressure of the air supply port is greater than the pressure of the liquid level of the second sealing liquid, and the pressure difference between the air supply port and the liquid level of the second sealing liquid is greater than the second preset pressure, the vacuum breaking pipeline inputs air into the first pipeline through the third pipeline.

[0012] The above-mentioned pipeline water seal device can alleviate the positive or negative pressure in the pure water tank when excessive positive or negative pressure occurs in the pure water tank, avoid rupture and damage of the pure water tank, and reduce the cost loss of production equipment. The pipeline water seal device in this embodiment is formed by pipeline assembly, which is convenient for processing and assembly. All connection parts are exposed to the outside, which is convenient for inspection, reliable for connection, and has high safety. It also occupies less space and has a low cost. Moreover, since the components are pipe fittings, the pipe fitting size can be selected or modified according to on-site test data for assembly. Changes and modifications are also convenient and the use flexibility is high.

[0013] Optionally, the third pipe is a "U"-shaped pipe, and the "U"-shaped pipe includes a first vertical pipe and a second vertical pipe in parallel, and a horizontal pipe connecting the bottom end of the first vertical pipe and the bottom end of the second vertical pipe. The first vertical pipe is connected to the second vertical pipe through the horizontal pipe. The port at the top of the first vertical pipe is connected to the gas outlet of the vacuum breaking pipe. The second vertical pipe is provided with a liquid outlet, the bottom edge of the liquid outlet is flush with the liquid level of the second sealing liquid, and the liquid outlet is connected to the first pipe.

[0014] Optionally, the top of the air outlet pipe is connected to and communicated with the liquid outlet, and the air outlet pipe is communicated with the first pipeline through a connecting pipe.

[0015] Optionally, the pipeline water sealing device further includes a fluid replenishing device, wherein a fluid replenishing pipe of the fluid replenishing device is connected to the top end of the second vertical pipe and is used to replenish the sealing liquid to the second vertical pipe.

[0016] Optionally, the third pipeline includes a straight pipe arranged in parallel with the first pipeline, both ends of the straight pipe are connected to a sealing cover, a first through-hole is provided on the tube wall of the straight pipe, and the first through-hole is connected to the first pipeline; the bottom end of the vacuum breaking pipeline extends into the third pipeline, and the vacuum breaking pipeline extends into the second sealing liquid.

[0017] Optionally, a second through-hole is further provided on the tube wall of the straight tube, the distance between the first through-hole and the bottom end of the straight tube is greater than the distance between the second through-hole and the bottom end of the straight tube, the top end of the air outlet pipe is connected to the second through-hole, and the air outlet pipe is connected to the first pipeline through the straight tube.

[0018] Optionally, the pipeline water sealing device further includes a fluid replenishing device, wherein a fluid replenishing pipe of the fluid replenishing device is connected to the top end of the straight pipe and is used to replenish the sealing liquid to the straight pipe.

[0019] Optionally, the vacuum breaking pipe is detachably connected to the top end of the third pipe.

[0020] Optionally, the pipeline water seal device also includes a fourth pipeline, which is arranged in parallel with the second pipeline, the bottom end of the fourth pipeline is connected and communicated with the bottom end of the second pipeline, the top end of the fourth pipeline is communicated with the atmosphere, and the port at the top end of the fourth pipeline constitutes the drainage port of the second pipeline.

[0021] Optionally, the air outlet pipe is detachably connected to the top end of the second pipe.

[0022] Optionally, the second pipe is a pipe made of a transparent material.

[0023] Optionally, the pipeline water sealing device further includes a fluid replenishing device, and the second pipeline and the third pipeline are both connected to the fluid replenishing device, and the fluid replenishing device is used to replenish the sealing liquid to the second pipeline and the third pipeline.

[0024] The present invention also provides a sealing system for a pure water tank, comprising a nitrogen sealing device and any one of the pipeline water sealing devices provided in the above technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1A schematic structural diagram of a pipeline water seal device provided in an embodiment of the present invention;

[0026] Figure 2 A schematic structural diagram of a pipeline water seal device provided in an embodiment of the present invention.

[0027] Icons: 1-positive pressure protection component; 2-vacuum breaking protection component; 3-fluid infusion tube; 11-first pipeline; 12-second pipeline; 13-exhaust pipe; 14-exhaust pipe; 15-fourth pipeline; 16-downstream pipe; 17-connecting pipe; 21-third pipeline; 21a-"U"-shaped pipe; 21b-straight pipe; 22-vacuum breaking pipeline; 23-connecting pipe; 211-first vertical pipe; 212-second vertical pipe; 213-horizontal pipe. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0029] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a pipeline water seal device. For the convenience of explanation, the extension direction of the central axis of the first pipeline 11 is the vertical direction, and the direction perpendicular to the axis of the first pipeline 11 is the horizontal direction. The pipeline water seal device provided in this embodiment specifically includes: a positive pressure protection component 1 and a vacuum breaking protection component 2; the positive pressure protection component 1 includes: a first pipeline 11 and a second pipeline 12 arranged in parallel, and an air outlet pipe 13, wherein the first pipeline 11 and the second pipeline 12 can both be pipe fittings, and can both be made of plastic. The top of the first pipeline 11 is used to connect with the overflow port of the pure water tank. The overflow port of the pure water tank is generally located at the top of the pure water tank. The nitrogen used for nitrogen sealing in the pure water tank will gather at the top. The upper end of the first pipeline 11 is connected to the overflow port of the pure water tank, that is, it is connected to the top of the pure water tank, so that nitrogen can enter the first pipeline 11 through the overflow port. The bottom of the first pipeline 11 is connected to the bottom of the second pipeline 12. Specifically, the first The bottom end of the pipe 11 is flush with the bottom end of the second pipe 12, and can be connected through a horizontal transverse pipe fitting. The transverse pipe fitting and the first pipe 11 and the second pipe 12 are conveniently connected, simply and reliably. The top end of the second pipe 12 has an exhaust port. Specifically, a cover can be provided at the top end of the second pipe 12, and an opening is provided on the cover. This opening can form an exhaust port of the second pipe 12. Specifically, an exhaust pipe 14 can be connected to the exhaust port. In addition, a preset amount of a first sealing liquid for liquid sealing is filled in the first pipe 11 and the second pipe 12. The first sealing liquid can be water. The second pipe 12 is provided with a drain port. The plane flush with the drain port can form the discharge level of the first sealing liquid in the second pipe 12 (such as Figure 1 and Figure 212 , the bottom end of the air outlet pipe 13 is inserted into the second pipe 12 at the top end of the second pipe 12, and the port at the bottom end of the air outlet pipe 13 forms an air outlet. The air outlet pipe 13 is a thin tube with a smaller diameter. The diameter of the air outlet pipe 13 is much smaller than that of the second pipe 12. The air outlet pipe 13 is used to discharge the gas in the air outlet pipe 13 from the air outlet, and no external atmosphere will enter the first channel from the air outlet pipe 13. The bottom end of the air outlet pipe 13 is connected to the first pipe 11, and the bottom end of the air outlet pipe 13 is connected to the second pipe 12 at the top end of the second pipe 12. The top end of the second pipe 12 extends into the second pipe 12. Specifically, a through hole can be set on the cover of the second pipe 12, and the air outlet pipe 13 passes through the through hole. The bottom end of the air outlet pipe 13 extends to a certain depth in the second pipe 12, so that the air outlet extends into the first sealing liquid, and the air outlet is lower than the discharge liquid level. The second sealing liquid will form a first preset pressure between the air outlet and the discharge liquid level. When the pressure difference between the pressure at the air outlet and the atmospheric pressure is greater than the first preset pressure, the gas in the air outlet pipe 13 will be discharged from the air outlet, and the bubbles will emerge from the second sealing liquid in the second pipe 12, and thus be discharged to the outside.

[0030] The vacuum breaking protection assembly 2 includes: a third pipe 21 and a vacuum breaking pipe 22. The top of the vacuum breaking pipe 22 is connected to the atmosphere, and the port at the bottom of the vacuum breaking pipe 22 forms an air supply port. The air supply port is connected to the third pipe 21. The vacuum breaking pipe 22 is used to input air into the third pipe 21, and the vacuum breaking pipe 22 is only used for the outside atmosphere to input air into the third pipe 21. The third pipe 21 is connected to the first pipe 11. There is a preset amount of second sealing liquid in the third pipe 21, so that a second preset pressure is formed between the liquid level of the second sealing liquid in the third pipe 21 and the air supply port. When the pressure of the air supply port is greater than the pressure of the liquid level of the second sealing liquid, the air supply port is opened. Strong, that is, when the atmospheric pressure is greater than the gas pressure above the liquid surface of the second sealing liquid (the gas pressure above the liquid surface of the second sealing liquid is the gas pressure in the pure water tank), and the pressure difference between the gas inlet and the liquid surface of the second sealing liquid is greater than the second preset pressure, that is, the gas pressure in the pure water tank is negative, and the negative pressure reaches a certain value, so that the pressure difference between the atmospheric pressure and the negative pressure overcomes the second preset pressure, the vacuum breaking pipe 22 inputs air into the first pipe 11 through the third pipe 21, and the atmosphere enters the third pipe 21 from the vacuum breaking pipe 22, and then enters the first pipe 11, alleviating the negative pressure condition in the pure water tank.

[0031] It should be noted that the first sealing liquid and the second sealing liquid can be the same liquid, such as water, or other liquids used for sealing.

[0032] The following further explains the above-mentioned pipeline water seal device from the principle:

[0033] First of all, it should be noted that there will be a certain amount of nitrogen in the upper part of the pure water tank. Under normal circumstances, the gas pressure in the pure water tank will be within a certain range. The pure water tank is kept in a normal state, and the gas pressure in the pure water tank will also have a certain positive pressure or negative pressure. However, if the positive pressure or negative pressure in the pure water tank exceeds a certain value, it will cause damage to the pure water tank. After the above-mentioned pipeline water seal device is connected to the pure water tank, the following reference Figure 1 and Figure 2 Two cases are used to illustrate this:

[0034] When the pure water tank is under positive pressure, that is, the gas pressure in the pure water tank is greater than the external atmospheric pressure, the gas in the pure water tank will generate a certain pressure on the liquid level of the first sealing liquid in the first pipe 11. The bottom of the first pipe 11 and the second pipe 12 are connected, and the liquid level of the second pipe 12 will rise. When the positive pressure in the pure water tank reaches a certain level, for example, the positive pressure in the pure water tank exceeds the preset value, the first sealing liquid in the second pipe 12 will be discharged at the drain port, and the positive pressure at the air outlet of the air outlet pipe 13 exceeds the first preset pressure. The gas in the first pipe 11 will overcome the first preset pressure at the air outlet of the air outlet pipe 13 and emit bubbles, and be discharged at the exhaust port of the second pipe 12, so as to avoid excessive positive pressure in the pure water tank and damage to the pure water tank.

[0035] When the pure water tank is under negative pressure, that is, the gas pressure in the pure water tank is lower than the external atmospheric pressure, the atmospheric pressure will generate a certain pressure on the second sealing liquid at the gas outlet of the vacuum breaking pipe 22. The third pipe 21 is connected to the first pipe 11. When the negative pressure in the pure water tank exceeds the preset value, the atmospheric pressure will overcome the second preset pressure at the gas outlet, and air will enter the third pipe 21 from the gas outlet, and then enter the first pipe 11 and the pure water tank, thereby avoiding a vacuum in the pure water tank and preventing damage to the pure water tank due to excessive negative pressure in the pure water tank.

[0036] Therefore, the above-mentioned pipeline water seal device can alleviate the positive or negative pressure in the pure water tank when excessive positive or negative pressure occurs in the pure water tank, avoid rupture and damage of the pure water tank, and reduce the cost loss of production equipment. The pipeline water seal device in this embodiment is formed by pipeline assembly, which is convenient for processing and assembly. All connection parts are exposed to the outside, which is convenient for inspection, reliable for connection, and has high safety. It also occupies less space and has a low cost. Moreover, since the components are pipe fittings, the pipe fitting size can be selected or modified according to on-site test data for assembly. It is also convenient to change and modify, and has high flexibility in use.

[0037] Among them, in the above-mentioned pipeline water seal device, if Figure 1As shown, the vacuum breaking pipe 22 has a certain preset height in the vertical direction, and when the second sealing liquid is filled into the vacuum breaking pipe 22, a liquid column with a certain preset height is formed to prevent overflow of the anti-overflow liquid column. The anti-overflow liquid column forms a third preset pressure. The third preset pressure is greater than the first preset pressure. When the positive pressure in the pure water tank is too large, the gas is exhausted at the outlet of the gas outlet pipe 13, and no gas is discharged from the vacuum breaking pipe 22. The vacuum breaking pipe 22 includes the preset height section, and when the positive pressure is too large, it is filled with liquid to prevent gas from flowing. The air is discharged at the vacuum breaking pipe 22. When the negative pressure is too large, air enters the pure water tank through the vacuum breaking pipe 22. The vacuum breaking pipe 22 is equivalent to forming a one-way vent valve. Alternatively, a one-way vent valve is directly installed at the air inlet at the top of the vacuum breaking pipe 22, so that the air inlet of the vacuum breaking pipe 22 can only take in air. It can also prevent air from being discharged from the vacuum breaking pipe 22 when the positive pressure in the pure water tank is too large, or other methods can be used to achieve one-way ventilation in the vacuum breaking pipe 22. This is not limited to this embodiment.

[0038] Similarly, if Figure 1 As shown, for the air outlet pipe 13, a certain preset height is also set at a section of the air outlet of the air outlet pipe 13 upward, so that when the negative pressure in the pure water tank is too large, the pressure of the liquid column in a preset height near the air outlet in the air outlet pipe 13 forms a fourth preset pressure, and the fourth preset pressure is greater than the second preset pressure, so that when the negative pressure in the pure water tank is too large, the liquid in the water outlet pipe will not be sucked into the first pipe 11, and the air will not enter the first pipe 11 at the air outlet; or, at the air outlet pipe 13 near the air outlet A one-way vent valve is installed on the pipe section so that the gas can only flow from the outlet pipe 13 to the outlet port, and can only be discharged at the outlet port. Alternatively, the absolute value of the second preset pressure is directly set to be smaller than the absolute value of the first preset pressure. When negative pressure occurs, the vacuum breaking pipe 22 first overcomes the second preset pressure to relieve the negative pressure in the pure water tank. It can also avoid the outlet pipe 13 from sucking air into the first pipe 11 when negative pressure occurs. Alternatively, other methods are used to achieve one-way ventilation of the outlet pipe 13. This is not limited to this embodiment.

[0039] In a possible embodiment, the above-mentioned pipeline water seal device also includes a fluid replenishment device, and the second pipeline and the third pipeline are both connected to the fluid replenishment device. The fluid replenishment device is used to replenish the second pipeline and the third pipeline with sealing liquid. Since the third pipeline and the second pipeline are both connected to the atmosphere, in order to avoid the sealing liquid from being lost due to evaporation or other reasons, a fluid replenishment device is provided to replenish the second pipeline and the third pipeline with a small amount of sealing liquid to ensure that the pipeline water seal device can operate normally. The fluid replenishment device can be provided for timed fluid replenishment, or it can be real-time fluid replenishment with a continuous small flow rate. This embodiment is not limited thereto.

[0040] In specific implementation, there are multiple options for the structure of the vacuum breaking assembly, such as:

[0041] Method 1:

[0042] like Figure 1 As shown, the third pipeline 21 is configured as a "U"-shaped tube 21a. The "U"-shaped tube 21a includes a first vertical tube 211 and a second vertical tube 212 in parallel, and a horizontal tube 213 connecting the bottom end of the first vertical tube 211 and the bottom end of the second vertical tube 212. The first vertical tube 211 and the second vertical tube 212 are vertically arranged, and the horizontal tube 213 is horizontally arranged. The first vertical tube 211 and the second vertical tube 212 are connected through the horizontal tube 213. The top port of the first vertical tube 211 is connected to the gas outlet of the vacuum breaking pipe 22. A liquid outlet is provided on the second vertical tube 212. Specifically, the liquid outlet is provided on the tube wall of the second vertical tube 212. The bottom edge of the liquid outlet is flush with the liquid level of the second sealing liquid, and the liquid level of the liquid outlet is at the same level as the bottom side of the second vertical tube 212. The liquid column between the two forms a second preset pressure, and the liquid outlet is connected to the first pipe 11. When the negative pressure in the pure water tank is too large, the atmospheric pressure generates pressure on the second sealing liquid at the first vertical pipe 211. When the pressure difference between the atmospheric pressure and the pressure in the pure water tank is greater than the second preset pressure, the atmosphere in the vacuum breaking pipe 22 presses the second sealing liquid in the "U"-shaped tube 21a out at the liquid outlet, so that the vacuum breaking pipe 22 is connected to the first pipe 11 through the "U"-shaped tube 21a, and air enters the first pipe 11 and enters the pure water tank, alleviating the negative pressure state and avoiding damage to the pure water tank. The "U"-shaped tube 21a here is connected to the vacuum breaking pipe 22. The structure is simple and reliable, easy to manufacture, and easy to adjust, modify and replace, which greatly simplifies the overall structure and reduces the cost.

[0043] In order to further simplify the overall structure, based on the above method 1, continue to refer to Figure 1 As shown, the top of the air outlet pipe 13 is connected to and communicated with the liquid outlet, and an opening is provided at a position on the middle wall of the air outlet pipe 13, to which a connecting pipe 17 is connected. The connecting pipe 17 can be provided perpendicularly to the air outlet pipe 13, and the air outlet pipe 13 is communicated with the first pipeline 11 via the connecting pipe 17. The air outlet pipe 13 is a straight pipe, and the connecting pipe 17 is connected to the wall of the middle part of the air outlet pipe 13. The air outlet pipe 13 and the connecting pipe 17 form a tee pipe. The air outlet pipe 13 is divided into two parts at the connection port of the connecting pipe 17, the upper part being the upper pipe section and the lower part being the lower pipe section. The pipe opening on the upper side of the upper pipe section is communicated with the liquid outlet of the "U"-shaped pipe 21a, and the port of the lower pipe section forms the air outlet. The port of the connecting pipe 17 is connected to the wall of the first pipeline 11 and communicates with the first pipeline 11. Then, the "U"-shaped pipe 21a and the second pipeline 12 are connected via the tee pipe, and the structure is simple and reliable.

[0044] Next, continue to refer to Figure 1On the basis of the setting of the above-mentioned method 1, the infusion tube 3 of the infusion device is connected to the top end of the second vertical tube 212 and is used to replenish the sealing liquid to the second vertical tube 212. The sealing liquid in the infusion tube 3 can enter the second vertical tube 212, and the sealing liquid in the "U"-shaped tube 21a is replenished to a preset amount. After reaching the preset amount, the sealing liquid will flow out from the liquid outlet and enter the second pipe 12 along the air outlet pipe 13. The second pipe 12 can also be replenished with liquid. The overall structure is simple and reliable, and liquid replenishment is convenient.

[0045] Method 2:

[0046] As another embodiment of the structure of the vacuum breaking component, Figure 2 As shown, the third pipe 21 can be set as a straight pipe 21b set in parallel with the first pipe 11, and both ends of the straight pipe 21b are connected to a sealing cover. A first through-hole is set on the wall of the straight pipe 21b, and the first through-hole is connected to the first pipe 11 through a connecting pipe 23; the bottom end of the vacuum breaking pipe 22 passes through the sealing cover above and extends into the third pipe 21, and the vacuum breaking pipe 22 extends into the second sealing liquid, and the port at the bottom end of the vacuum breaking pipe 22 is below the liquid level of the second sealing liquid, and the port at the bottom end of the vacuum breaking pipe 22 is shaped The gas delivery port is formed, and the liquid column between the gas delivery port and the liquid surface of the second sealing liquid forms a second preset pressure. When the negative pressure in the pure water tank is too large and reaches the preset value, the atmospheric pressure is greater than the pressure in the pure water tank, and the pressure difference between the atmospheric pressure and the pressure in the pure water tank at the gas delivery port is greater than the second preset pressure, air will form bubbles at the gas delivery port of the vacuum breaking pipe 22 and enter the straight pipe 21b. The straight pipe 21b is connected to the first pipe 11, so the air will enter the pure water tank, avoiding damage to the pure water tank and reducing the cost loss of production equipment.

[0047] Specifically, if Figure 2 As shown, based on the setting of the above-mentioned method 2, a second through-hole is further provided on the tube wall of the straight tube 21b, and the distance between the first through-hole and the bottom end of the straight tube 21b is greater than the distance between the second through-hole and the bottom end of the straight tube 21b. In the vertical direction, the position of the second through-hole on the straight tube 21b is lower than the position of the first through-hole, and the top end of the air outlet pipe 13 is connected with the second through-hole, and the air outlet pipe 13 is connected with the first pipeline 11 through the straight tube 21b. The structure is simple, and the overall structural layout is simplified.

[0048] Preferably, a fluid replenishment tube 3 of a fluid replenishment device can be provided to be connected to the top end of the straight tube 21b and used to replenish the straight tube 21b with sealing liquid. When the sealing liquid reaches the liquid outlet of the straight tube 21b, it will flow along the liquid outlet into the air outlet pipe 13, and then enter the second pipe 12 to replenish the second pipe 12. The overall structure is simple and reliable, and fluid replenishment is convenient.

[0049] Specifically, in the above-mentioned method 2, the vacuum breaking pipe 22 is detachably connected to the top of the third pipe 21, which is convenient for replacement and modification. The vacuum breaking pipe 22 can be adjusted up and down relative to the third pipe 21 in the vertical direction, and the distance between the gas transmission port and the liquid surface of the second sealing liquid can be adjusted. The size of the second preset pressure can be adjusted to adapt to the on-site air pressure data of the pure water tank nitrogen seal, which is convenient and flexible to use.

[0050] Specifically, in the above-mentioned pipeline water seal device, the air outlet pipe 13 is detachably connected to the top end of the second pipe 12, and the air outlet pipe 13 can be adjusted up and down relative to the second pipe 12 in the vertical direction. The distance between the air outlet and the liquid surface of the first sealing liquid can be adjusted, and the size of the first preset pressure can be adjusted to adapt to the on-site air pressure data for the pure water tank nitrogen seal. It is easy and flexible to use.

[0051] In addition, in one possible embodiment, the second pipe 12 is a transparent pipe, which facilitates observation of the situation at the air outlet in the second pipe 12 and allows direct observation of whether there is exhaust at the air outlet. Specifically, the first pipe 11 can also be a transparent pipe, which allows direct observation of the liquid level in the first pipe 11 and the air pressure in the first pipe 11.

[0052] Furthermore, for the above-mentioned air outlet pipe, connecting pipe, communicating pipe, vacuum breaking pipe and "U"-shaped pipe, plastic pipe fittings can be used, and transparent pipe fittings can be used to facilitate observation.

[0053] Specifically, the above-mentioned pipeline water seal device also includes a fourth pipeline 15, which is arranged in parallel with the second pipeline 12. The bottom end of the fourth pipeline 15 is connected to and communicated with the bottom end of the second pipeline 12, the top of the fourth pipeline 15 is communicated with the atmosphere, and the port at the top of the fourth pipeline 15 constitutes the drainage port of the second pipeline 12. The top of the fourth pipeline 15 is connected to a downstream pipe 16, one end of the downstream pipe 16 is connected to the drainage port of the fourth pipeline 15, and the other end is grounded downward to avoid splashing of the discharged liquid.

[0054] In addition, bonding can be used for the interfaces between the above pipe fittings, which makes the connection convenient, firm and with good sealing.

[0055] This embodiment also provides a sealing system for a pure water tank, specifically including a nitrogen sealing device and any one of the pipeline water sealing devices provided in the above embodiments. The nitrogen sealing device is used to be connected to the pure water tank and to supply nitrogen to the pure water tank for sealing. The pipeline water sealing device is used to be connected to the overflow port of the pure water tank and to protect the pure water tank when positive pressure or negative pressure appears in the pure water tank, so as to avoid damage due to excessive pressure difference between the pure water tank and the outside world.

[0056] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A pipeline water seal device, characterized in that: include: Positive pressure protection components and vacuum protection components; The positive pressure protection component includes: A first pipe and a second pipe are arranged in parallel, the bottom of the first pipe is connected to the bottom of the second pipe, the top of the first pipe is used to communicate with the overflow port of the pure water tank, the top of the second pipe has an exhaust port, the first pipe and the second pipe contain a first sealing liquid for liquid sealing, and the second pipe is provided with a drain port to form a discharge liquid level of the first sealing liquid in the second pipe; an air outlet pipe, wherein the top end of the air outlet pipe is connected to the first pipe, the port at the bottom end of the air outlet pipe forms an air outlet, the bottom end of the air outlet pipe extends into the second pipe along the top end of the second pipe, and the air outlet extends into the first sealing liquid, the air outlet is lower than the discharge liquid level, and a first preset pressure is formed between the air outlet and the discharge liquid level; The vacuum breaking protection assembly comprises: A third pipeline and a vacuum breaking pipeline, the top of the vacuum breaking pipeline is connected to the atmosphere, and the port at the bottom of the vacuum breaking pipeline forms an air supply port, the air supply port is connected to the third pipeline, and the third pipeline is connected to the first pipeline. A preset amount of second sealing liquid is contained in the third pipeline, so that a second preset pressure is formed between the liquid level of the second sealing liquid in the third pipeline and the air supply port. When the pressure of the air supply port is greater than the pressure of the liquid level of the second sealing liquid, and the pressure difference between the air supply port and the liquid level of the second sealing liquid is greater than the second preset pressure, the vacuum breaking pipeline inputs air into the first pipeline through the third pipeline.

2. The pipeline water seal device according to claim 1, characterized in that: The third pipeline is a "U"-shaped tube, which includes a first vertical tube and a second vertical tube in parallel, and a horizontal tube connecting the bottom end of the first vertical tube and the bottom end of the second vertical tube. The first vertical tube is connected to the second vertical tube through the horizontal tube. The port at the top of the first vertical tube is connected to the gas outlet of the vacuum breaking pipeline. The second vertical tube is provided with a liquid outlet. The bottom edge of the liquid outlet is flush with the liquid level of the second sealing liquid. The liquid outlet is connected to the first pipeline.

3. The pipeline water seal device according to claim 2, characterized in that: The top of the air outlet pipe is connected to and communicated with the liquid outlet, and the air outlet pipe is communicated with the first pipeline through a connecting pipe.

4. The pipeline water seal device according to claim 3, characterized in that: It also includes a fluid replenishing device, wherein the fluid replenishing tube of the fluid replenishing device is connected to the top end of the second vertical pipe and is used to replenish the sealing liquid to the second vertical pipe.

5. The pipeline water seal device according to claim 1, characterized in that: The third pipeline includes a straight pipe arranged in parallel with the first pipeline, both ends of the straight pipe are connected to a sealing cover, a first through-hole is provided on the tube wall of the straight pipe, and the first through-hole is connected to the first pipeline; the bottom end of the vacuum breaking pipeline extends into the third pipeline, and the vacuum breaking pipeline extends into the second sealing liquid.

6. The pipeline water seal device according to claim 5, characterized in that: A second through-hole is also provided on the wall of the straight pipe, the distance between the first through-hole and the bottom end of the straight pipe is greater than the distance between the second through-hole and the bottom end of the straight pipe, the top end of the air outlet pipe is connected to the second through-hole, and the air outlet pipe is connected to the first pipeline through the straight pipe.

7. The pipeline water seal device according to claim 6, characterized in that: It also includes a fluid replenishing device, wherein the fluid replenishing tube of the fluid replenishing device is connected with the top end of the straight tube and is used to replenish the sealing liquid to the straight tube.

8. The pipeline water seal device according to claim 5, characterized in that: The vacuum breaking pipe is detachably connected to the top end of the third pipe.

9. The pipeline water seal device according to any one of claims 1 to 8, characterized in that: It also includes a fourth pipe, which is arranged in parallel with the second pipe, the bottom end of the fourth pipe is connected to and communicated with the bottom end of the second pipe, the top end of the fourth pipe is communicated with the atmosphere, and the port at the top end of the fourth pipe constitutes the drainage port of the second pipe.

10. The pipeline water seal device according to any one of claims 1 to 8, characterized in that: The air outlet pipe is detachably connected to the top end of the second pipe.

11. The pipeline water seal device according to any one of claims 1 to 8, characterized in that: The second pipe is a pipe made of transparent material.

12. The pipeline water seal device according to claim 1, characterized in that: It also includes a fluid replenishing device, to which the second pipeline and the third pipeline are both connected, and the fluid replenishing device is used to replenish the sealing liquid to the second pipeline and the third pipeline.

13. A sealing system for a pure water tank, characterized in that: It comprises a nitrogen sealing device and a pipeline water sealing device as described in any one of claims 1 to 12.

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