A sealing fluid adding device and mechanical sealing tank

Abstract

This application discloses a sealing fluid adding device and a mechanical seal tank. The sealing fluid adding device includes a storage tank, a connecting pipe, and a adding pipe. The connecting pipe and the adding pipe are installed on the storage tank. The connecting pipe connects the storage tank to the atmosphere, and the adding pipe connects the storage tank to the mechanical seal tank. The first end of the adding pipe is higher than the second end, and the adding pipe is a siphon pipe. The sealing fluid in the adding pipe flows within the connecting pipe under the pressure difference, realizing the automatic addition of sealing fluid from the storage tank to the mechanical seal tank. The sealing fluid adding device disclosed in this solution delivers the sealing fluid to the mechanical seal tank through the storage tank and the connecting pipe. During the addition process, the sealing fluid is not exposed to the air, reducing its evaporation into the surrounding environment, optimizing the working environment for workers, and reducing the harm to workers caused by the sealing fluid addition process.

Description

Technical Field

[0001] This application relates to the field of chemical technology, and in particular to a sealing liquid addition device and a mechanical sealing tank. Background Technology

[0002] In related technologies, when the liquid level in the mechanical seal tank is low or there is no sealing liquid, the liquid is manually added by the staff.

[0003] However, the addition of corrosive and volatile sealing fluids can cause them to evaporate into the surrounding environment, resulting in pollution and harm to workers.

[0004] Therefore, how to reduce the environmental pollution and harm to workers caused by the addition of sealing fluid has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] This application discloses a sealant adding device to reduce the harm to workers caused by adding sealant. This application also discloses a mechanically sealed tank having the above-mentioned sealant adding device.

[0006] To achieve the above objectives, this application provides a sealing fluid adding device, including a storage tank, a connecting pipe, and a adding pipe; the storage tank is used to hold the sealing fluid; the connecting pipe is disposed on the storage tank and is used to connect the storage tank to the atmosphere, and a first opening and closing element is provided on the connecting pipe; a first end of the adding pipe is connected to the storage tank, and a second end of the adding pipe is connected to the mechanical seal tank, the height of the first end of the adding pipe is higher than the height of the second end of the adding pipe, and the adding pipe is used to inject the sealing fluid from the storage tank into the mechanical seal tank, and a second opening and closing element is provided on the adding pipe.

[0007] Optionally, in the above-mentioned sealing fluid adding device, one end of the connecting pipe that is connected to the atmosphere is connected to the inlet of the pump of the mechanical seal tank; a pressure gauge is installed on the connecting pipe to detect the pressure of the sealing fluid in the connecting pipe; a third opening and closing element is installed upstream of the pressure gauge.

[0008] Optionally, in the above-mentioned sealing liquid adding device, the storage tank includes an inflation valve and a first vent valve; the inflation valve is used to fill the storage tank with protective gas; the first vent valve is used to discharge the gas in the storage tank.

[0009] Optionally, in the above-mentioned sealing fluid adding device, a filter is provided on the adding pipe, the filter is used to filter the sealing fluid supplied to the mechanical seal tank; the second opening and closing element is located upstream of the filter.

[0010] Optionally, the above-mentioned sealing liquid adding device also includes a slag discharge pipe for discharging impurities deposited in the storage tank, and the slag discharge pipe is provided with a fourth opening and closing element.

[0011] Optionally, in the above-mentioned sealing liquid adding device, the slag discharge pipe is connected to the storage tank; or, the slag discharge pipe is connected to the liquid adding pipe, the connection position between the liquid adding pipe and the slag discharge pipe is located between the second opening and closing element and the filter, and the liquid adding pipe is provided with a fifth opening and closing element downstream of the filter.

[0012] Optionally, the above-mentioned sealing fluid adding device also includes a bypass pipe; the first end of the bypass pipe is connected to the storage tank, the second end of the bypass pipe is connected to the adding pipe, and a sixth opening and closing element is provided on the bypass pipe; the height of the connection position between the first end of the bypass pipe and the storage tank is higher than the height of the connection position between the adding pipe and the storage tank.

[0013] Optionally, in the above-mentioned sealing liquid adding device, a first liquid level gauge is provided on the liquid storage tank, which is used to display the liquid level height of the liquid storage tank.

[0014] Secondly, this application discloses a mechanically sealed can, including a mechanically sealed can body and a sealing fluid adding device, wherein the sealing fluid adding device is the sealing fluid adding device described in any of the above-mentioned schemes.

[0015] Optionally, in the above-mentioned mechanical seal tank, a second level gauge is provided on the mechanical seal tank body, which is used to display the liquid level height of the sealing liquid inside the mechanical seal tank body.

[0016] This application provides a sealing fluid adding device, including a storage tank, a connecting pipe, and a adding pipe. The storage tank is equipped with the connecting pipe and the adding pipe. The connecting pipe connects the storage tank to the atmosphere, and the adding pipe connects the storage tank to the mechanical seal tank. The first end of the adding pipe is higher than the second end, and the adding pipe is a siphon pipe. The sealing fluid in the adding pipe flows within the connecting pipe under the pressure difference, realizing the automatic addition of sealing fluid from the storage tank to the mechanical seal tank. The sealing fluid adding device disclosed in this solution delivers the sealing fluid to the mechanical seal tank through the storage tank and the connecting pipe, ensuring that the sealing fluid is not exposed to the air during the adding process. This reduces the evaporation of the sealing fluid into the surrounding environment, optimizes the working environment for workers, and reduces the harm to workers during sealing fluid addition.

[0017] This application also discloses a mechanically sealed can, including a can body and a sealing fluid adding device, wherein the sealing fluid adding device is the same as described in any of the above-mentioned embodiments. Since the sealing fluid adding device has the aforementioned technical effects, the mechanically sealed can with this device also has the same technical effects, and will not be elaborated further here. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort, and this application can be applied to other similar scenarios based on the provided drawings. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0019] Figure 1 This is a schematic diagram of the structure of a mechanically sealed tank with a sealing liquid adding device provided in an embodiment of this application.

[0020] in:

[0021] 1-Storage tank; 2-Connecting pipe; 3-Adding pipe; 4-Mechanical seal tank body; 5-First opening and closing element; 6-Second opening and closing element; 7-Pump; 8-Pressure gauge; 9-Third opening and closing element; 10-Air filling valve; 11-First vent valve; 12-Filter; 13-Slag discharge pipe; 14-Fourth opening and closing element; 15-Fifth opening and closing element; 16-Bypass pipe; 17-Sixth opening and closing element; 18-First level gauge; 19-Second level gauge; 20-Second vent valve. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. The described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0023] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0024] It should be understood that the terms "system," "apparatus," "unit," and / or "module" used in this application are a method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0025] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0026] In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0027] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0028] Please see Figure 1 This is a schematic diagram of the mechanically sealed tank with a sealing fluid adding device disclosed in this application. For ease of subsequent description, this solution is illustrated using a methanol circulation pump adding methanol as an example, where the mechanically sealed tank adds methanol to the methanol circulation pump.

[0029] To ensure the normal operation of the methanol circulation pump, workers need to repeatedly add methanol to the mechanical seal tank.

[0030] Methanol is corrosive, toxic, and volatile. During the addition of formaldehyde, methanol is exposed to the air and evaporates into the surrounding environment. This not only pollutes the environment but also harms workers who are exposed to methanol, as the volatile methanol can corrode their skin and respiratory tract.

[0031] In addition, if methanol splashes during the addition process, it can cause secondary injuries to workers.

[0032] It should be noted that the scope of application of the sealing fluid addition device disclosed in this solution is not limited to methanol, but can also include other sealing fluids, all of which are within the protection scope of this application.

[0033] The sealing fluid adding device includes a storage tank 1, a connecting pipe 2, and a adding pipe 3.

[0034] Among them, storage tank 1 is used to hold sealing liquid;

[0035] The connecting pipe 2 is installed on the liquid storage tank 1 to connect the liquid storage tank 1 with the atmosphere so that the gas pressure inside the liquid storage tank 1 is equal to the atmospheric pressure.

[0036] The first end of the filling pipe 3 is connected to the storage tank 1, and the second end of the filling pipe 3 is connected to the mechanical seal tank. The height of the first end of the filling pipe 3 is higher than the height of the second end of the filling pipe 3. The filling pipe 3 is used to connect the storage tank 1 and the mechanical seal tank. The sealing liquid of the storage tank 1 is injected into the mechanical seal tank through the filling pipe 3.

[0037] Storage tank 1 is a closed container. The sealing fluid is contained within this closed container, reducing its evaporation into the surrounding environment and minimizing pollution. This improves the working environment for staff and reduces the risk of harm from the sealing fluid.

[0038] A first opening and closing element 5 is provided on the connecting pipe 2. When it is necessary for the storage tank 1 to inject sealing fluid into the mechanical seal tank, the first opening and closing element 5 is opened, and the storage tank 1 is connected to the atmosphere through the connecting pipe 2; when it is not necessary for the storage tank 1 to inject sealing fluid into the mechanical seal tank, the first opening and closing element 5 is closed, blocking the connection between the storage tank 1 and the atmosphere.

[0039] The first opening and closing element 5 can be a valve or other opening and closing structure that can control whether the connecting pipe 2 is connected to the atmosphere, and all of them are within the protection scope of this application.

[0040] A second opening and closing element 6 is provided on the liquid filling pipe 3. When it is necessary for the liquid storage tank 1 to inject sealing fluid into the mechanical seal tank, the second opening and closing element 6 is opened, and the liquid storage tank 1 delivers sealing fluid to the mechanical seal tank through the liquid filling pipe 3; when it is not necessary for the liquid storage tank 1 to inject sealing fluid into the mechanical seal tank, the second opening and closing element 6 is closed, blocking the connection between the liquid filling pipe 3 and the mechanical seal tank.

[0041] The height of the first end of the filling pipe 3 is higher than the height of the second end of the filling pipe 3. The filling pipe 3 is a siphon pipe. The sealing liquid in the filling pipe 3 flows in the connecting pipe 2 under the driving force of the pressure difference, so that the sealing liquid is automatically injected from the storage tank 1 into the mechanical seal tank without external power input, which reduces the energy consumption of adding sealing liquid.

[0042] Optionally, the height of the storage tank 1 is higher than the top height of the mechanical seal tank, ensuring that the liquid level in the storage tank 1 is always higher than the liquid level in the mechanical seal tank after it is filled with sealing fluid. The storage tank 1 automatically adds liquid to the mechanical seal tank, keeping the mechanical seal tank always full of sealing fluid and ensuring timely replenishment.

[0043] When the sealing fluid in the storage tank 1 is completely discharged or impurities are discharged from the storage tank 1, the mechanical seal tank is always in working condition; after the storage tank 1 is filled with liquid or impurities are discharged, the sealing fluid is injected into the storage tank 1, and the storage tank 1 resumes the function of automatically adding sealing fluid to the mechanical seal tank.

[0044] When the sealing fluid adding device adds sealing fluid to the mechanical seal tank, the first opening and closing element 5 opens, making the pressure in the storage tank 1 equal to the atmospheric pressure; the second opening and closing element 6 opens, connecting the storage tank 1 and the mechanical seal tank, and the sealing fluid in the storage tank 1 is injected into the mechanical seal tank through the connecting pipe 2 under the pushing action of the pressure difference.

[0045] When the sealing fluid adding device does not add sealing fluid to the mechanical seal tank, the first opening and closing element 5 is closed, blocking the connection between the storage tank 1 and the outside world; the second opening and closing element 6 is closed, blocking the connection between the storage tank 1 and the mechanical seal tank.

[0046] Optionally, the first opening / closing element 5 and the second opening / closing element 6 can be opened or closed simultaneously, or opened or closed sequentially.

[0047] The sealing fluid addition device disclosed in this solution delivers the sealing fluid to the mechanical sealing tank through the storage tank 1 and the connecting pipe 2. This ensures that the sealing fluid is not exposed to the air during the addition process, reducing the evaporation of the sealing fluid into the surrounding environment, optimizing the working environment for workers, and reducing the harm to workers caused by the addition of the sealing fluid.

[0048] Optionally, the first opening and closing element 5 and the second opening and closing element 6 are solenoid valves. The first opening and closing element 5 and the second opening and closing element 6 are automatically opened and closed through remote control, realizing the automatic addition and automatic stop of sealing fluid, replacing manual operation and reducing the manual labor intensity of adding sealing fluid.

[0049] The process of adding sealant requires almost no operator intervention, reducing the possibility of injury to workers due to operator error and improving safety.

[0050] In some embodiments, the connecting pipe 2 is connected to the liquid injection port of the mechanical seal tank, and the liquid injection port is the liquid injection port that the mechanical seal tank itself has;

[0051] In other embodiments, the mechanical seal can has an interface for connecting to the connecting pipe 2, the connecting pipe 2 is connected to the interface, and the liquid injection port on the mechanical seal can serves as a backup interface for injecting sealing fluid into the mechanical seal can.

[0052] The connection method between the connecting pipe 2 and the mechanical seal can is not limited to the two embodiments described above. Other methods that can connect the connecting pipe 2 and the mechanical seal can also be used, and all of them are within the protection scope of this application.

[0053] For ease of subsequent description, the end of the connecting pipe 2 that is connected to the liquid storage tank 1 is named the first end of the connecting pipe 2, and the end of the connecting pipe 2 that is not connected to the liquid storage tank 1 is named the second end of the connecting pipe 2. The second end of the connecting pipe 2 is connected to the atmosphere.

[0054] In some embodiments, the second end of the connecting pipe 2 is directly connected to the atmosphere. A first opening and closing element 5 is provided at the second end of the connecting pipe 2 to cut off the connection between the second end of the connecting pipe 2 and the atmosphere when it is not necessary, thereby preventing the sealing liquid from evaporating into the surrounding environment through the second end of the connecting pipe 2.

[0055] In other embodiments, the second end of the connecting pipe 2 is connected to the inlet of the pump 7 of the mechanical seal tank. The sealing liquid evaporated from the storage tank 1 through the connecting pipe 2 enters the inlet of the pump 7 through the connecting pipe 2, and is pumped out as the pump 7 starts. The amount of sealing liquid evaporated into the surrounding environment can be used as the circulating liquid for the pump 7, reducing waste. A first opening / closing element 5 is provided at the first end of the connecting pipe 2 near the inlet of the pump 7; when the pump 7 is turned on, the first opening / closing element 5 is closed.

[0056] The connection position of the second end of the connecting pipe 2 is not limited to the above embodiment. It can also be any other position that can enable the connecting pipe 2 to communicate with the atmosphere and reduce the evaporation of the sealing liquid into the surrounding environment. All of these positions are within the scope of protection of this application.

[0057] Optionally, the first end of the connecting pipe 2 connected to the storage tank 1 is located at the highest end of the storage tank 1, so that the sealing liquid of the storage tank 1 can be poured into the storage tank 1 as much as possible without affecting the storage capacity of the storage tank 1 for the sealing liquid; at the same time, it can also reduce the sealing difficulty at the connection between the connecting pipe 2 and the storage tank 1 to a certain extent.

[0058] In an embodiment where the second end of the connecting pipe 2 is connected to the inlet of the pump 7 of the mechanical seal tank, optionally, a pressure gauge 8 is provided between the connection position of the connecting pipe 2 and the inlet of the pump 7 and the first opening and closing element 5.

[0059] The inlet of pump 7 is typically connected to a methanol storage tank or container. The second end of connecting pipe 2 is also connected to the inlet of pump 7, and correspondingly, the second end of connecting pipe 2 is also connected to the methanol storage tank or container, which can supply methanol to storage tank 1 via connecting pipe 2. This solution, by connecting connecting pipe 2 to the inlet of pump 7, ensures that the injection of sealing fluid into storage tank 1 is carried out within a closed pipeline, preventing the sealing fluid from being exposed to air, reducing its evaporation into the surrounding environment, optimizing the working environment for personnel, and eliminating the need for manual intervention during the addition process, thus not increasing labor intensity.

[0060] Pressure gauge 8 is used to detect the pressure of methanol supplied from the storage tank or container to the storage tank 1.

[0061] Optionally, a third opening / closing element 9 is provided upstream of pressure gauge 8. The function of the third opening / closing element 9 is to prevent methanol from entering the connecting pipe 2 when methanol is being transported through pump 7. In this scheme, opening / closing elements are provided both upstream and downstream of pressure gauge 8, and pressure gauge 8 is installed between the two opening / closing elements.

[0062] Here, upstream and downstream are defined with reference to the flow direction of the sealing liquid in the connecting pipe 2. The end closer to the methanol supply tank or container is upstream, and the end farther away from the methanol supply tank or container is downstream.

[0063] Methanol is flammable and explosive. To improve the safety of injecting methanol into the storage tank 1, the storage tank 1 may optionally be equipped with a purging valve 10, through which protective gas is introduced into the storage tank 1. The protective gas can be an inert gas, such as nitrogen.

[0064] The storage tank 1 is also equipped with a first vent valve 11, which is used to release the gas in the storage tank 1.

[0065] Before injecting methanol into the storage tank 1, both the inflation valve 10 and the first vent valve 11 are opened. Protective gas is injected into the storage tank 1 through the inflation valve 10 to replace the air in the storage tank 1. The air is discharged through the first vent valve 11.

[0066] Then, methanol is injected into the storage tank 1, the charging valve 10 is closed, and the first vent valve 11 is opened. As methanol is injected, the protective gas in the storage tank 1 is discharged through the first vent valve 11.

[0067] The first vent valve 11 can also release some of the gas in the storage tank 1 when the gas pressure in the storage tank 1 is high, so as to regulate the pressure in the storage tank 1.

[0068] Optionally, a filter 12 is installed on the liquid filling pipe 3 to filter the sealing fluid injected into the mechanical seal tank, filter out impurities in the sealing fluid, reduce impurities entering the mechanical seal tank, and to a certain extent protect the methanol circulation pump.

[0069] Optionally, a filter 12 can also be installed on the pipeline that injects sealing fluid into the storage tank 1 to filter the sealing fluid supplied to the storage tank 1 and reduce impurities entering the storage tank 1.

[0070] Filter 12 can be a screen filter or a bag filter, etc.

[0071] The filtration accuracy of the filters 12 located upstream and downstream of the liquid storage tank 1 can be the same or different.

[0072] After the sealing fluid is left to stand in the storage tank 1, impurities will settle at the bottom of the storage tank 1. To prevent impurities settling at the bottom of the storage tank 1 from entering the mechanical seal tank, the sealing fluid adding device disclosed in this solution may optionally include a slag discharge pipe 13, which is used to discharge impurities from the storage tank 1.

[0073] In some embodiments, the slag discharge pipe 13 is connected to the storage tank 1. Optionally, the slag discharge pipe 13 is connected to the bottom of the storage tank 1, and impurities located at the bottom of the storage tank 1 are discharged from the storage tank 1 through the slag discharge pipe 13.

[0074] In other embodiments, the slag discharge pipe 13 is connected to the liquid filling pipe 3. Optionally, the connection between the slag discharge pipe 13 and the liquid filling pipe 3 is located between the second opening and closing element 6 and the filter 12, so that when the impurities in the storage tank 1 are discharged through the slag discharge pipe 13, the impurities do not pass through the filter 12.

[0075] A fourth opening and closing element 14 is provided on the slag discharge pipe 13. When the liquid storage tank 1 injects sealing fluid into the mechanical seal tank, the fourth opening and closing element 14 is in the closed state; the fourth opening and closing element 14 is only opened when the slag discharge pipe 13 discharges slag outward.

[0076] In the embodiment where the slag discharge pipe 13 is connected to the liquid filling pipe 3, the liquid filling pipe 3 is provided with a fifth opening and closing element 15 downstream of the filter 12. When injecting sealing fluid into the mechanical seal tank, the second opening and closing element 6 and the fifth opening and closing element 15 are opened, and the fourth opening and closing element 14 is closed; when discharging slag, both the second opening and closing element 6 and the fourth opening and closing element 14 are opened, and the fifth opening and closing element 15 is closed, ensuring that the sealing fluid containing impurities only passes through the slag discharge pipe 13.

[0077] To ensure the reliability of the sealing fluid addition device, the sealing fluid addition device disclosed in this solution also includes a bypass pipe 16, which serves as a backup pipeline for the addition pipe 3.

[0078] like Figure 1 As shown, the first end of the bypass pipe 16 is connected to the storage tank 1, and the second end of the bypass pipe 16 is connected to the end of the filling pipe 3 near the mechanical seal tank or directly to the mechanical seal tank. Optionally, the height of the position where the bypass pipe 16 connects to the storage tank 1 is higher than the height of the position where the filling pipe 3 connects to the storage tank 1, so as to reduce impurities entering the mechanical seal tank through the bypass pipe 16.

[0079] Optionally, the connection point between the connecting pipe 2 and the storage tank 1 is located on the bottom wall of the storage tank 1, and the connection point between the bypass pipe 16 and the storage tank 1 is located on the side wall of the storage tank 1.

[0080] In the event of a blockage or leak in the filling pipe 3, the sealing fluid in the storage tank 1 is injected into the mechanical seal tank through the bypass pipe 16. Optionally, a filter 12 is also installed on the bypass pipe 16 to filter the sealing fluid supplied to the mechanical seal tank through the bypass pipe 16.

[0081] A sixth opening and closing element 17 is provided on the bypass pipe 16. When it is necessary to inject sealing fluid into the mechanical seal tank through the bypass pipe 16, the sixth opening and closing element 17 is opened; when it is not necessary to inject sealing fluid into the mechanical seal tank through the bypass pipe 16, the sixth opening and closing element 17 is closed.

[0082] To facilitate staff in checking the level of the sealing liquid in the storage tank 1, optionally, a first level gauge 18 is installed on the storage tank 1, which is used to display the liquid level height of the storage tank 1.

[0083] Whether injecting sealing fluid into storage tank 1 or discharging sealing fluid from storage tank 1 to mechanical seal tank, the operator can check the level of sealing fluid in storage tank 1 without opening it.

[0084] The liquid storage tank 1 can be a cylindrical structure with semi-circular ends, a cubic structure, a cylindrical structure, or other shapes that can hold the sealing liquid, all of which are within the scope of protection of this application.

[0085] The liquid storage tank 1 can be a fully enclosed tank structure with an injection port only at the top; or the liquid storage tank 1 can be a tank structure with an open top, and the top of the liquid storage tank 1 is sealed by a sealing cap.

[0086] Optionally, all opening and closing components in this solution are electrically controlled.

[0087] Secondly, this application also discloses a mechanical seal can, including a mechanical seal can body 4 and a sealing liquid adding device, wherein the sealing liquid adding device is the sealing liquid adding device described in any of the above-mentioned schemes.

[0088] Since the sealing fluid addition device has the aforementioned technical effects, the mechanically sealed tank equipped with this device also has the same technical effects, which will not be elaborated further here. It can be used on a large scale in the liquid addition devices of mechanically sealed tanks in chemical plants.

[0089] Please continue reading. Figure 1 The mechanical seal tank is equipped with a second level gauge 19, which is used to display the liquid level of the sealing liquid inside the mechanical seal tank body 4.

[0090] The sealing fluid adding device injects sealing fluid into the mechanical seal tank body 4. Specifically, the fourth opening and closing element 14 and the sixth opening and closing element 17 are closed; the first opening and closing element 5 and the third opening and closing element 9 are opened, and the liquid storage tank 1 is connected to the atmosphere; the second opening and closing element 6 and the fifth opening and closing element 15 are opened, and the liquid storage tank 1 is connected to the mechanical seal tank through the connecting pipe 2; the liquid storage tank 1 injects sealing fluid into the mechanical seal tank until the liquid level of the sealing fluid in the mechanical seal tank reaches the preset height.

[0091] The sealing fluid adding device stops adding sealing fluid to the mechanical seal tank body 4 once the liquid level reaches a preset height. Specifically, the first opening and closing element 5, the second opening and closing element 6, the third opening and closing element 9, the fourth opening and closing element 14, the fifth opening and closing element 15, and the sixth opening and closing element 17 are all closed.

[0092] When the connecting pipe 2 of the sealing fluid addition device malfunctions or the filter 12 of the connecting pipe 2 needs to be replaced, the storage tank 1 injects sealing fluid into the mechanical seal tank through the bypass pipe 16. Specifically, the first opening and closing element 5 and the third opening and closing element 9 are opened, and the storage tank 1 is connected to the atmosphere; the second opening and closing element 6 and the fifth opening and closing element 15 are closed, and the storage tank 1 is not connected to the mechanical seal tank through the connecting pipe 2; the fourth opening and closing element 14 is closed; the sixth opening and closing element 17 is opened, and the storage tank 1 is connected to the mechanical seal tank through the bypass pipe 16, and the storage tank 1 injects sealing fluid into the mechanical seal tank.

[0093] When impurities need to be discharged from the storage tank 1 of the sealing fluid addition device, the first opening and closing element 5 and the third opening and closing element 9 are opened, and the storage tank 1 is connected to the atmosphere; the sixth opening and closing element 17 and the fifth opening and closing element 15 are closed, and the storage tank 1 is not connected to the mechanical seal tank through the connecting pipe 2 and the bypass pipe 16; the fourth opening and closing element 14 is opened, and the sealing fluid containing impurities at the bottom of the storage tank 1 is discharged through the slag discharge pipe 13.

[0094] The mechanical seal tank body 4 is also equipped with a second vent valve 20. During the process of injecting sealing fluid from the storage tank 1 into the mechanical seal tank body 4, the first vent valve 20 is opened to release the gas in the storage tank 1, ensuring that the sealing fluid can be smoothly injected into the mechanical seal tank.

[0095] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed, and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. The scope of this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described application concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A sealed liquid additive device, characterized by, It includes a storage tank (1), a connecting pipe (2), and a liquid filling pipe (3); The storage tank (1) is used to hold the sealing liquid; The connecting pipe (2) is installed on the liquid storage tank (1) to connect the liquid storage tank (1) with the atmosphere. The connecting pipe (2) is provided with a first opening and closing element (5). The first end of the filling pipe (3) is connected to the storage tank (1), and the second end of the filling pipe (3) is connected to the mechanical seal tank. The height of the first end of the filling pipe (3) is higher than the height of the second end of the filling pipe (3). The filling pipe (3) is used to inject the sealing liquid of the storage tank (1) into the mechanical seal tank. The filling pipe (3) is provided with a second opening and closing element (6).

2. The sealed liquid additive device of claim 1, wherein, One end of the connecting pipe (2) that is connected to the atmosphere is connected to the inlet of the pump (7) of the mechanical seal tank; A pressure gauge (8) is provided on the connecting pipe (2), and the pressure gauge (8) is used to detect the pressure of the sealing fluid in the connecting pipe (2); A third opening and closing element (9) is provided upstream of the pressure gauge (8).

3. The sealed liquid additive device of claim 1, wherein The storage tank (1) includes an inflation valve (10) and a first vent valve (11). The gas filling valve (10) is used to fill the liquid storage tank (1) with protective gas; The first vent valve (11) is used to discharge the gas in the liquid storage tank (1).

4. The sealed liquid additive device of claim 1, wherein A filter (12) is provided on the liquid addition pipe (3), and the filter (12) is used to filter the sealing liquid supplied to the mechanical seal tank; The second opening and closing element (6) is located upstream of the filter (12).

5. The sealed liquid additive device of claim 4, wherein, It also includes a slag discharge pipe (13) for discharging impurities deposited in the storage tank (1). The slag discharge pipe (13) is provided with a fourth opening and closing element (14).

6. The sealed liquid additive device of claim 5, wherein, The slag discharge pipe (13) is connected to the liquid storage tank (1); or, The slag discharge pipe (13) is connected to the liquid addition pipe (3). The connection position between the liquid addition pipe (3) and the slag discharge pipe (13) is located between the second opening and closing element (6) and the filter (12). The liquid addition pipe (3) is provided with a fifth opening and closing element (15) downstream of the filter (12).

7. The sealed liquid additive device of any one of claims 1-6, wherein, It also includes a bypass pipe (16); The first end of the bypass pipe (16) is connected to the liquid storage tank (1), and the second end of the bypass pipe (16) is connected to the end of the liquid filling pipe (3) near the mechanical seal tank. A sixth opening and closing element (17) is provided on the bypass pipe (16). The height of the first end of the bypass pipe (16) connected to the liquid storage tank (1) is higher than the height of the liquid filling pipe (3) connected to the liquid storage tank (1).

8. The sealed liquid additive device of any one of claims 1-6, wherein, The storage tank (1) is equipped with a first liquid level gauge (18), which is used to display the liquid level height of the storage tank (1).

9. A machine closure can, characterized by It includes a mechanical seal tank body (4) and a sealing fluid adding device, wherein the sealing fluid adding device is the sealing fluid adding device according to any one of claims 1-8.

10. The machine closure can according to claim 9, characterized in that The mechanical seal tank body (4) is provided with a second liquid level gauge (19), which is used to display the liquid level height of the sealing liquid inside the mechanical seal tank body (4).

Images