A high-safety hazardous chemical tank that is easy to drain accumulated liquid

Abstract

The present invention relates to the technical field of tank containers, and specifically to a high-safety hazardous chemical tank that is convenient for draining accumulated liquid, comprising a tank assembly, wherein the tank assembly comprises a tank body and a manhole assembly arranged on the top of the tank body; a liquid accumulation pit is arranged at the bottom of the tank body corresponding to the manhole assembly; a top discharge hole for installing a siphon is opened in the center of the manhole cover; the siphon, one end of the siphon passes through the top discharge hole and extends to the bottom of the liquid accumulation pit, the bottom of the siphon is connected with a telescopic assembly, the telescopic assembly is arranged in the liquid accumulation pit, and a floating extrusion assembly is arranged on the telescopic assembly to ensure that the telescopic assembly is tightly fitted with the inner wall of the liquid accumulation pit; a lining, the lining is arranged on the inner wall of the tank body, the surface of the manhole assembly in contact with the stored liquid, and the inner and outer walls of the siphon. The corrosion resistance of the tank body and the efficiency of the liquid discharge process are significantly improved, the need for manual intervention is reduced, and the safety and convenience of the operation process are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tank containers, and in particular to a high-safety hazardous chemical tank that is convenient for draining accumulated liquid. Background Art

[0002] Tank container tanks are key equipment for storing and transporting highly corrosive and highly toxic chemical liquids, and are widely used in the pharmaceutical and chemical industries. Their main function is to ensure the sealing, safety and efficient discharge of stored liquids. However, the liquid storage tanks in the prior art still have the following technical problems in actual use:

[0003] During the bottom emptying process of a traditional liquid storage tank, the siphon tube is usually close to the bottom of the tank. Due to the residual liquid and the liquid sealing phenomenon in the initial drainage stage, the drainage is often not smooth, affecting the efficiency. Especially when the bottom of the tank is designed to be an arc or flat bottom structure, the liquid sealing effect is more significant, causing fluid blockage and complicating the drainage operation.

[0004] Currently, most tanks are made of corrosion-resistant materials such as stainless steel. However, after long-term contact with the stored liquid, the inner wall of the tank and the components in contact with the stored liquid (such as siphons and manhole components) may still corrode and age, thus affecting the service life and safety of the equipment. Although lining coating technology has been used to enhance corrosion resistance, the existing coating process has insufficient adhesion, which can easily lead to lining shedding or partial failure.

[0005] Liquid residue often remains in the liquid accumulation area at the bottom of the liquid storage tank, which is difficult to completely empty through the existing siphon structure. This residual liquid problem not only requires manual intervention, increasing the complexity of operation, but also may cause secondary contamination and leakage risks of chemical liquids, affecting the overall efficiency of the liquid storage tank. Summary of the invention

[0006] The purpose of the present invention is to solve the problems in the background technology and to propose a high-safety hazardous chemical tank that is convenient for draining accumulated liquid.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a high-safety hazardous chemical tank that is convenient for draining accumulated liquid, comprising:

[0008] A tank assembly, comprising a tank body and a manhole assembly arranged on the top of the tank body;

[0009] A liquid accumulation pocket is provided at a position corresponding to the manhole assembly at the bottom of the tank body;

[0010] The manhole assembly comprises a manhole cover and a manhole flange, wherein the manhole cover is fixedly connected to the manhole flange by a plurality of evenly distributed fastening bolts; a top discharge hole for installing a siphon pipe is provided in the center of the manhole cover;

[0011] A siphon tube, one end of which passes through the top discharge hole and extends to the bottom of the liquid accumulation cavity, and the other end of which is sealed and connected to the top discharge hole;

[0012] The bottom of the siphon is connected with a telescopic component, which is arranged in the liquid accumulation cavity and used to empty the remaining stored liquid in the liquid accumulation cavity. A floating extrusion component is arranged on the telescopic component to ensure that the telescopic component is closely fitted with the inner wall of the liquid accumulation cavity.

[0013] The lining layer includes one or more composite layers of a lead layer, a rubber layer, a fiberglass layer, a polytetrafluoroethylene layer, an epoxy resin layer, and a stainless steel layer. The lining layer is arranged on the inner wall of the tank body, the surface inside the manhole assembly that contacts the stored liquid, and the inner and outer walls of the siphon.

[0014] Preferably, the contact surfaces of the manhole cover and the manhole flange are provided with an annular groove for improving the stability and sealing effect of the lining sealing surface and enhancing the bonding strength between the lining and the substrate.

[0015] Preferably, a siphon fixing assembly is provided on the outer side of the siphon;

[0016] The siphon tube fixing assembly includes a fixing plate fixed to the bottom of the tank body, with both sides of the fixing plate being arranged in an open shape, and a fixing ring being fixedly connected to the middle of the fixing plate, and the inner diameter of the fixing ring gradually decreases from top to bottom along the fixing ring, and the upper inner diameter is larger than the lower inner diameter, so as to facilitate the siphon tube to be inserted into the fixing ring and achieve stable positioning.

[0017] Preferably, the outer side of the fixing plate, the outer side of the fixing ring and the inner side of the fluid accumulation pocket are all covered with a lining layer.

[0018] Preferably, the telescopic assembly comprises a tube body connected to the lower end of the siphon tube, the tube body is inserted in the siphon tube, an arc-shaped regulating tube is integrally connected to the lower part of the tube body, an annular flange is arranged on the upper side of the outer surface of the arc-shaped regulating tube, an annular liquid storage groove is formed between the inner side of the annular flange and the outer side of the tube body, the lower end of the siphon tube is inserted in the annular liquid storage groove, when there is a solution in the annular liquid storage groove, the connection between the siphon tube and the arc-shaped regulating tube plays a sealing role, thereby improving the siphon effect, the lower end of the arc-shaped regulating tube abuts against the inner bottom of the liquid accumulation cavity, and a circle of opening grooves is provided on the side of the arc-shaped regulating tube close to the liquid accumulation cavity;

[0019] The tube body is made of polytetrafluoroethylene material, and the tube wall of the tube body is made of hollow material, so that the telescopic component maintains buoyancy in the liquid storage solution.

[0020] Preferably, the floating extrusion assembly comprises an arc-shaped hole opened in a cross shape on the fixed plate, an arc-shaped pressure box is arranged through the arc-shaped hole, a counterweight block is arranged in the arc-shaped pressure box, and an inclined plate is arranged on the lower inner side of the arc-shaped pressure box;

[0021] An outwardly inclined guide plate is arranged on the upper outer side of the annular flange, and the outer end of the inclined plate extends above the guide plate to guide the stored liquid into the annular liquid storage tank to ensure that the annular liquid storage tank remains filled with the stored solution.

[0022] Preferably, a pressure plate matching the arc-shaped pressure box is further provided on the outer side of the arc-shaped adjustment tube. When the arc-shaped pressure box moves downward, the pressure plate is squeezed so that the lower end of the arc-shaped adjustment tube fits tightly in the effusion pocket.

[0023] Preferably, the manhole assembly is also provided with an air inlet pipe and a one-way valve. The air inlet pipe is arranged on the manhole cover, and the one-way valve is installed on the air inlet pipe to allow air to enter the tank body during the drainage process to adjust the pressure balance inside and outside the tank body, prevent the tank body from deforming and improve the drainage efficiency. A connecting piece is connected to the valve body of the one-way valve, and a connecting rod is connected to the top of the arc pressure box. The other end of the connecting rod maintains intermittent contact with the connecting piece, and the connecting rod is driven to move by the up and down movement of the arc pressure box, thereby causing the connecting piece to vibrate, thereby preventing the valve body of the one-way valve from sticking due to crystallization of the stored liquid, resulting in difficulty in opening.

[0024] Compared with the existing technology, the advantages of the storage tank body that is convenient for draining accumulated liquid are:

[0025] 1. The present application greatly improves the smoothness of the drainage process by providing an arc-shaped adjustment tube at the bottom of the tank body and utilizing a floating tube body design, thereby avoiding the liquid seal effect commonly seen in traditional devices. Usually when draining the liquid, if the traditional siphon tube is directly attached to the bottom of the tank body, a liquid seal phenomenon is easily formed, that is, the airtight contact between the liquid and the bottom prevents the airflow from entering the siphon tube, resulting in obstruction of liquid flow, a significant slowdown in the initial discharge speed, and even uneven drainage. To solve this problem, the present application uses polytetrafluoroethylene material in the design and designs a hollow structure tube body so that it has a certain buoyancy in the liquid storage solution. During the drainage process, the tube body can naturally float up and maintain a reasonable gap with the bottom of the tank, avoiding the phenomenon of the arc-shaped adjustment tube being attached to the bottom of the effusion pit due to its own weight, thereby eliminating the risk of liquid seal. In addition, the annular flange and the guide plate structure work together to guide the stored liquid into the annular liquid storage tank, ensure the sealing of the connection between the siphon tube and the arc-shaped regulating tube, so that a high siphon effect can be maintained from beginning to end during the discharge, thereby ensuring that the tank body is discharged unimpeded and efficient. The device of the application can significantly improve the efficiency of the discharge process, reduce the need for manual intervention, and improve the safety and convenience of the operation process.

[0026] 2. This application significantly improves the corrosion resistance of the equipment by coating the inner wall of the tank, the siphon, and the parts where the manhole assembly contacts the stored liquid. In addition, the manhole assembly further enhances the stability and sealing effect of the lining by setting an annular groove. Such a design not only effectively isolates the direct contact between the stored liquid and the inner wall of the tank, prolongs the service life of the equipment, but also reduces the safety hazards caused by corrosion. While ensuring safety, it reduces the frequency of equipment maintenance and replacement, greatly improving the reliability and economic benefits of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 It is a front view structural schematic diagram of the present invention.

[0029] Figure 3 The present invention Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle.

[0030] Figure 4 It is a schematic diagram of the structure of the telescopic component in the present invention.

[0031] Figure 5 It is a schematic diagram of a local cross-sectional structure in the present invention.

[0032] Figure 6 It is a schematic diagram of a local three-dimensional cross-sectional structure in the present invention.

[0033] Figure 7 The present invention Figure 6 Enlarged structural diagram at A in the middle.

[0034] In the figure: 1. tank assembly; 11. tank body; 12. manhole assembly; 121. manhole cover; 122. manhole flange; 123. annular groove; 124. air inlet pipe; 125. one-way valve; 126. connecting piece; 13. liquid accumulation nest; 2. siphon; 3. telescopic assembly; 31. tube body; 32. arc-shaped adjustment tube; 33. annular flange; 34. annular liquid storage tank; 35. opening groove; 4. floating extrusion assembly; 41. arc-shaped hole; 42. arc-shaped pressure box; 43. inclined plate; 44. guide plate; 45. pressure plate; 46. connecting rod; 5. lining; 6. siphon fixing assembly; 61. fixing plate; 62. fixing ring. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] During the emptying process of the bottom of the liquid storage tank, the siphon tube is often close to the bottom of the tank, which may cause the drainage to be not smooth due to the residual liquid, especially in the initial drainage stage, it is easy to form a "liquid seal" phenomenon. Due to the existence of the liquid seal effect, the liquid storage solution will be blocked in the initial discharge stage, affecting the drainage efficiency. This problem is particularly significant when the bottom of the tank is designed to be curved or flat.

[0038] In order to solve the above problems, the present application provides a high-safety hazardous chemical tank that is convenient for draining accumulated liquid. Figure 1-Figure 4 , including: a tank assembly 1, which includes a tank body 11 and a manhole assembly 12 arranged on the top of the tank body 11; the tank body 11 is made of corrosion-resistant stainless steel material with a thickness of not less than 8mm, and can withstand the corrosion of the stored liquid, as well as the vibration and stress changes of the tank during transportation.

[0039] A liquid accumulation pocket 13 is provided at a position corresponding to the manhole assembly 12 at the bottom of the tank body 11. The liquid accumulation pocket 13 is designed to be an arc-shaped structure with a depth of 5% of the height of the bottom part of the tank body to ensure that the residual stored liquid at the bottom of the tank can be concentrated in the liquid accumulation pocket 13 for easy emptying. The arc-shaped structure can reduce the residual accumulated liquid and improve the drainage efficiency.

[0040] The manhole assembly 12 includes a manhole cover 121 and a manhole flange 122. The manhole cover 121 is fixedly connected to the manhole flange 122 by a plurality of evenly distributed fastening bolts to ensure the sealing performance of the manhole under high-pressure storage conditions. The fastening bolts are made of high-strength materials to ensure long-term reliability. A top discharge hole for installing a siphon pipe is provided in the center of the manhole cover 121.

[0041] Siphon tube 2, one end of which passes through the top discharge hole and extends to the bottom of the liquid accumulation nest 13, and the other end is sealed and connected to the top discharge hole; to ensure that the stored liquid inside the tank body 11 can be fully sucked out, the siphon tube 2 adopts a double-end sealing design to ensure a tight seal at the connection with the tank body 11 and the top discharge hole to prevent leakage of the stored liquid. The main material of the siphon tube 2 is a stainless steel tube.

[0042] The bottom of the siphon tube 2 is connected with a telescopic component 3, which is arranged in the liquid accumulation cavity 13 and used to empty the remaining stored liquid in the liquid accumulation cavity 13. A floating extrusion component 4 is arranged on the telescopic component 3 to ensure that the telescopic component 3 is closely fitted with the inner wall of the liquid accumulation cavity 13.

[0043] The structure of telescopic component 3 is as follows Figure 5-7 The figure shows a tube body 31 connected to the lower end of the siphon tube 2, the tube body 31 is inserted in the siphon tube 2, an arc-shaped regulating tube 32 is integrally connected to the lower part of the tube body 31, an annular flange 33 is arranged on the upper side of the outer surface of the arc-shaped regulating tube 32, an annular liquid storage groove 34 is formed between the inner side of the annular flange 33 and the outer side of the tube body 31, the function of the annular flange 33 is to ensure the sealing of the connection between the lower end of the siphon tube 2 and the arc-shaped regulating tube 32 through the annular liquid storage groove 34 inside it, when the annular liquid storage groove 34 is full of storage liquid, so as to enhance the siphon force, the lower end of the siphon tube 2 is inserted in the annular liquid storage groove 34, when there is solution in the annular liquid storage groove 34, the connection between the siphon tube 2 and the arc-shaped regulating tube 32 plays a sealing role, and the siphon effect is improved, the lower end of the arc-shaped regulating tube 32 abuts against the inner bottom of the liquid accumulation cavity 13, and a circle of opening grooves 35 is provided on the side of the arc-shaped regulating tube 32 close to the liquid accumulation cavity 13;

[0044] The tube body 31 is made of polytetrafluoroethylene, and the tube wall of the tube body 31 is a hollow material, so that the telescopic component 3 maintains buoyancy in the storage solution;

[0045] It should be noted that in traditional devices, the arc-shaped pipe structure often causes initial drainage problems due to direct contact with the bottom of the tank, because the bottom of the pipe may be in close contact with the bottom of the tank, forming a blockage phenomenon, which prevents the liquid from entering the drainage channel smoothly. This "liquid seal" effect is particularly prone to occur when the liquid is deposited, thereby affecting the initial discharge speed.

[0046] In the present application, when the storage solution is stored in the tank body 11, the tube body 31 is made of polytetrafluoroethylene, which has excellent corrosion resistance and light weight. The unique hollow design enables the tube body 31 to have a certain buoyancy in the storage solution. Because of the existence of buoyancy, when the storage solution is loaded in the tank body, the tube body 31 can remain in a floating state;

[0047] At this time, the arc-shaped adjusting tube 32 connected to the lower end of the tube body 31 will not directly adhere to the inner bottom of the liquid accumulation pit 13 at the bottom of the tank body. On the contrary, the buoyancy maintains a certain gap between the lower side of the arc-shaped adjusting tube 32 and the inner bottom of the liquid accumulation pit 13, thereby preventing the arc-shaped adjusting tube 32 from completely blocking the bottom of the liquid accumulation pit 13 due to its own weight or pressure during operation, thereby preventing similar liquid sealing phenomena from occurring in the initial stage of drainage. Therefore, the entire drainage process can be extremely smooth from the beginning, avoiding initial fluid blockage or clogging problems.

[0048] The lining 5 includes one or more composite layers of a lead layer, a rubber layer, a fiberglass layer, a polytetrafluoroethylene layer, an epoxy resin layer, and a stainless steel layer, and is arranged on the inner wall of the tank body 11, the surface inside the manhole assembly 12 in contact with the stored liquid, and the inner and outer walls of the siphon 2. After being treated by a coating process, the corrosive stored liquid can be effectively isolated from the metal surfaces in contact with the tank body 11 and the manhole assembly 12. According to the characteristics of the stored liquid, the coated lining 5 can be set to different types to prevent excessive corrosion of the tank wall and extend the service life of the tank.

[0049] In this embodiment, in order to enhance the sealing performance, the contact surfaces of the manhole cover 121 and the manhole flange 122 are provided with an annular groove 123 to improve the stability and sealing effect of the sealing surface of the lining 5 and enhance the bonding strength between the lining 5 and the substrate.

[0050] In one embodiment, when the lining layer 5 is a lead layer, the lead-plating process specifically includes:

[0051] S1: Surface treatment, sandblasting is used to remove the oxide layer, corrosion and other impurities on the inner wall of the tank. The surface should have a uniform roughness after sandblasting to enhance the adhesion of the lead lining. After sandblasting, it should be thoroughly cleaned to ensure that there is no residual dust, oil or moisture on the surface to prevent affecting the adhesion of the lead lining.

[0052] S2: The first tinning process is to tin the inner wall of the tank after sandblasting to enhance the bonding strength between lead and base metal, ensuring that the tin layer is evenly covered on the surface of the tank. The role of tinning is to serve as an adhesive layer between the lead lining and the base, thereby improving the adhesion strength of the lead lining and preventing the lead from falling off, splitting or blistering during long-term use.

[0053] S3: Lead-enamelling construction, for the inner wall of the cylinder of the tank body, the lead-enamelling operation is carried out by longitudinal reciprocating movement. The specific operation is: on the cylinder part of the tank body after tinning, the lead lining material is applied layer by layer to the inner wall of the cylinder through the hot enamelling process. When lead-enamelling, the operator should ensure the thickness and uniformity of each lead-enamelling to avoid defects or missing enamelling. The process of horizontal reciprocating lead-enamelling should ensure that the lead layer fits tightly to the inner wall, and the longitudinal movement covers the entire length of the cylinder. The lead-enamelling process should be based on different tank diameters and heights to ensure that the thickness and uniformity of the lead lining meet the design requirements. The lead-enamelling operation method of the inner wall of the tank head is different from that of the cylinder part. In order to effectively cover the spherical or conical arc surface of the head, especially the liquid accumulation area at the bottom center, it is necessary to adopt a lead-enamelling method that spirals from the middle bottom center to the outside: starting from the bottom center of the head, gradually cover the lead lining in a spiral upward and outward manner, and maintain a uniform thickness.

[0054] S4: After the lead lining process is completed, it needs to be cooled naturally to avoid cracking or deformation of the lead layer due to excessive cooling. After cooling, special testing equipment is used to check whether the thickness of the lead lining is uniform and whether there are defects such as bubbles, cracks, and voids on the surface. The tank body is tested for air tightness and leakage to ensure that the integrity and sealing performance of the lead lining meet the design standards and specifications, so as to ensure that the lead lining can resist the strong corrosion of the stored liquid for a long time.

[0055] In another embodiment, the lining layer is a polytetrafluoroethylene layer, and the specific process includes:

[0056] Surface treatment: Sandblast the inner wall surface of the tank to remove oxides and impurities, and at the same time form a certain degree of roughness to enhance the adhesion of the polytetrafluoroethylene layer to ensure that there is no residual oil and moisture on the inner wall.

[0057] Applying base glue: Evenly apply a layer of high temperature resistant adhesive on the inner wall after sandblasting, ensuring that it completely covers the surface of the tank and performs preliminary curing.

[0058] Laminating process: The prefabricated polytetrafluoroethylene film is covered on the inner wall by heat bonding, and the polytetrafluoroethylene layer is firmly bonded to the adhesive by high-temperature pressing process. The continuous annular pressing process is used in the liquid accumulation area of ​​the tank to ensure the complete coverage of the arc structure.

[0059] Inspection and repair: Use a spark detector to check the integrity of the PTFE layer and perform local repairs on any bubbles or pinholes found. After repair, inspect again to ensure there are no defects.

[0060] In order to further improve the fixing stability of the siphon tube 2 and prevent the siphon tube 2 from loosening due to vibration during transportation, a siphon tube fixing assembly 6 is provided on the outer side of the siphon tube 2;

[0061] The siphon tube fixing assembly 6 includes a fixing plate 61 fixed to the bottom of the tank body 11, and the two sides of the fixing plate 61 are arranged in an open shape. A fixing ring 62 is fixedly connected to the middle of the fixing plate 61. The inner diameter of the fixing ring 62 gradually decreases from top to bottom along the fixing ring 62, and the upper inner diameter is larger than the lower inner diameter, so that the siphon tube 2 can be inserted into the fixing ring 62 and be firmly positioned.

[0062] In this embodiment, the floating extrusion assembly 4 includes an arc-shaped hole 41 formed in a cross shape on the fixed plate 61, an arc-shaped pressure box 42 is provided through the arc-shaped hole 41, a counterweight is provided in the arc-shaped pressure box 42, and an inclined plate 43 is provided on the lower inner side of the arc-shaped pressure box 42;

[0063] An outwardly inclined guide plate 44 is provided above the annular flange 33 , and the outer end of the inclined plate 43 extends above the guide plate 44 to guide the stored liquid into the annular liquid storage tank 34 to ensure that the annular liquid storage tank 34 remains filled with the stored liquid solution.

[0064] The outer side of the arc-shaped regulating tube 32 is also provided with a pressing plate 45 matching the arc-shaped pressing box 42. When the arc-shaped pressing box 42 moves downward, the pressing plate 45 is squeezed to make the lower end of the arc-shaped regulating tube 32 fit tightly in the liquid accumulation cavity 13. When the liquid level in the tank decreases, the arc-shaped pressing box 42 continues to move toward the bottom, and the lower end of the arc-shaped regulating tube 32 is more closely fitted with the liquid accumulation cavity 13 through the squeezing force of the pressing plate 45, so that the residual liquid in the tank body can be discharged continuously, which reduces the need for manual intervention and improves the operation efficiency.

[0065] The coordinated design of the guide plate 44 and the inclined plate 43 allows the stored liquid to be placed at the bottom of the siphon tube 2 while the solution can smoothly enter the annular liquid storage groove 34 and cooperate with the siphon tube 2 to produce a stable suction force, so that the stored liquid near the bottom of the liquid accumulation cavity 13 can also be completely discharged.

[0066] In addition, after the stored liquid is emptied, the arc-shaped pressure box 42 is pressed on the arc-shaped adjustment tube 32 due to its own weight to prevent the empty tank from shaking when moving.

[0067] In order to ensure the balance of internal and external pressures of the tank body during the drainage process and reduce the deformation caused by internal and external pressures, the manhole assembly 12 is also provided with an air inlet pipe 124 and a one-way valve 125. The air inlet pipe 124 is arranged on the manhole cover 121, and the one-way valve 125 is installed on the air inlet pipe 124, which is used to allow air to enter the tank body 11 during the drainage process to adjust the internal and external pressure balance of the tank body 11, prevent the tank body 11 from deforming and improve the drainage efficiency. In order to prevent the one-way valve 125 from being blocked due to crystallization of stored liquid, a connecting piece 126 is connected to the valve body of the one-way valve 125, and a connecting rod 46 is connected to the top of the arc pressure box 42. The other end of the connecting rod 46 maintains intermittent contact with the connecting piece 126, and the connecting rod 46 is driven to move by the up and down movement of the arc pressure box 42, so that the connecting piece 126 vibrates, thereby preventing the valve body of the one-way valve 125 from bonding due to crystallization of stored liquid, resulting in difficulty in opening, greatly improving the safety during operation, and maintaining the service life of the valve body.

[0068] In order to further increase the structural strength of the tank body 11 , a reinforcing rib structure is provided on the outer wall of the tank body 11 .

[0069] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are conventional means well known to those skilled in the art.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-safety hazardous chemical tank that is convenient for draining accumulated liquid, characterized in that: include: A tank assembly, comprising a tank body and a manhole assembly arranged on the top of the tank body; A liquid accumulation pocket is provided at a position corresponding to the manhole assembly at the bottom of the tank body; The manhole assembly includes a manhole cover and a manhole flange. The manhole cover is fixedly connected to the manhole flange by a plurality of evenly distributed fastening bolts. A top discharge hole for installing a siphon pipe is provided in the center of the manhole cover. A siphon tube, one end of which passes through the top discharge hole and extends to the bottom of the liquid accumulation cavity, and the other end of which is sealed and connected to the top discharge hole; The bottom of the siphon is connected with a telescopic component, which is arranged in the liquid accumulation cavity and is used to empty the remaining stored liquid in the liquid accumulation cavity; The telescopic assembly includes a tube body connected to the lower end of the siphon tube, the tube body is inserted in the siphon tube, an arc-shaped adjustment tube is integrally connected to the lower part of the tube body, an annular flange is arranged on the upper side of the outer surface of the arc-shaped adjustment tube, and an annular liquid storage tank is formed between the inner side of the annular flange and the outer side of the tube body; A floating extrusion component is provided on the telescopic component to ensure that the telescopic component fits tightly with the inner wall of the effusion cavity; The floating extrusion assembly includes an arc-shaped hole opened in a cross shape on a fixing plate, the fixing plate is fixed to the bottom of the tank body, a fixing ring is fixedly connected to the middle of the fixing plate, a siphon is inserted into the fixing ring, the lower end of the siphon is inserted into the annular liquid storage tank, an arc-shaped pressure box is arranged through the arc-shaped hole, a counterweight is arranged in the arc-shaped pressure box, and an inclined plate is arranged on the lower inner side of the arc-shaped pressure box; An outwardly inclined guide plate is provided on the upper outer side of the annular flange, and the outer end of the inclined plate extends to the upper side of the guide plate, which is used to guide the storage liquid into the annular liquid storage tank to ensure that the annular liquid storage tank is kept filled with the storage solution; A pressure plate matching the arc-shaped pressure box is also arranged on the outer side of the arc-shaped adjusting tube; The lining layer is arranged on the inner wall of the tank body, the surface of the manhole assembly in contact with the stored liquid, and the inner and outer walls of the siphon.

2. A high-safety hazardous chemicals tank that is convenient for draining accumulated liquid according to claim 1, characterized in that: The contact surfaces of the manhole cover and the manhole flange are provided with an annular groove, which is used to improve the stability and sealing effect of the lining sealing surface and enhance the bonding strength between the lining and the substrate.

3. A high-safety hazardous chemicals tank that is convenient for draining accumulated liquid according to claim 1, characterized in that: A siphon fixing assembly is arranged on the outer side of the siphon; The siphon tube fixing assembly includes a fixing plate fixed to the bottom of the tank body, and the two sides of the fixing plate are arranged in an open shape. The inner diameter of the fixing ring gradually decreases from top to bottom along the fixing ring, and the upper inner diameter is larger than the lower inner diameter, so as to facilitate the siphon tube to be inserted into the fixing ring and achieve stable positioning.

4. A high-safety hazardous chemicals tank that is convenient for draining accumulated liquid according to claim 1, characterized in that: The outer side of the fixing plate, the outer side of the fixing ring and the inner side of the effusion pocket are all covered with a lining layer.

5. A high-safety hazardous chemicals tank that is convenient for draining accumulated liquid according to claim 1, characterized in that: When there is a solution in the annular liquid storage tank, the connection between the siphon tube and the arc-shaped regulating tube plays a sealing role, thereby improving the siphon effect. The lower end of the arc-shaped regulating tube abuts against the inner bottom of the liquid accumulation cavity, and a circle of open grooves is provided on one side of the arc-shaped regulating tube close to the liquid accumulation cavity. The tube body is made of polytetrafluoroethylene material, and the tube wall of the tube body is made of hollow material, so that the telescopic component maintains buoyancy in the liquid storage solution.

6. A high-safety hazardous chemicals tank that is convenient for draining accumulated liquid according to claim 5, characterized in that: When the arc-shaped pressure box moves downward, the lower end of the arc-shaped regulating tube is tightly fitted in the liquid accumulation cavity by squeezing the pressure plate.

7. A high-safety hazardous chemicals tank that is convenient for draining accumulated liquid according to claim 6, characterized in that: The manhole assembly is also provided with an air inlet pipe and a one-way valve. The air inlet pipe is arranged on the manhole cover, and the one-way valve is installed on the air inlet pipe, and is used for allowing air to enter the tank body during the drainage process to adjust the pressure balance inside and outside the tank body, prevent the tank body from deforming, and improve the drainage efficiency. A connecting piece is connected to the valve body of the one-way valve, and a connecting rod is connected to the top of the arc pressure box. The other end of the connecting rod maintains intermittent contact with the connecting piece, and the connecting rod is driven to move by the up and down movement of the arc pressure box, so that the connecting piece vibrates, thereby preventing the valve body of the one-way valve from sticking due to crystallization of the stored liquid, resulting in difficulty in opening.

8. The high-safety hazardous chemicals tank that is convenient for draining accumulated liquid according to claim 1 is characterized by: The lining layer includes one or more of a lead layer, a rubber layer, a glass fiber reinforced plastic layer, a polytetrafluoroethylene layer, an epoxy resin layer, and a stainless steel layer.

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