Leakage detection device and tank bottom valve

Abstract

A leakage prevention detection device and a tank bottom valve, comprising: a valve body; a liquid leakage pipeline arranged in the valve body, the liquid leakage pipeline comprising: a liquid leakage feed port connected to a retention cavity arranged in the circumferential direction of a valve core of a tank bottom valve of a storage tank, and a liquid leakage discharge port for detecting whether a medium has leaked; a sealing member drivenly arranged on a fluid channel of the liquid leakage pipeline, the sealing member having a closed position for blocking the fluid channel and an open position for connecting the fluid channel; the above-mentioned leakage prevention detection device is provided to solve the problem that the leakage of the existing tank bottom valve is not discovered until the valve body has already leaked liquid.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and mainly relates to a leakage prevention detection device and a tank bottom valve. Background Art

[0002] Tank bottom valves are generally used in the production process systems of biopharmaceutical, fine chemical and food chemical industries. Tank bottom valves are generally installed at the bottom of the fermentation tanks. The sterility requirements of tank bottom valves used in these industries are very high.

[0003] Among them, in order to ensure the advantage of good sealing during use, the tank bottom valve generally adds a sealing ring in the circumferential direction of the valve core. The sealing ring can enhance the sealing effect of the valve core when closing the valve. However, in actual use, the tank bottom valve repeatedly opens and closes the valve core, which will cause wear of the sealing ring over time, resulting in leakage between the valve core and the valve after closing. However, in the existing technology, the tank bottom valve leakage can only be discovered after the tank bottom valve body has leaked liquid, resulting in the leakage of liquid in the storage tank, causing material waste and increasing the cost of the merchant. In addition, when the tank bottom valve body leaks, the leaked liquid will also mix with other liquids in the tank bottom valve body, causing the problem of cross contamination of liquids. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the leakage of the existing tank bottom valve is not discovered until the valve body has leaked liquid. To this end, the present invention provides an anti-leakage detection device, including: a valve body; a leakage pipeline, which is arranged in the valve body, and the leakage pipeline includes: a leakage feed port connected to a retention cavity arranged in the circumferential direction of the valve core of the tank bottom valve of the storage tank, and a leakage discharge port for detecting whether there is leakage in the medium; a sealing member, which is driven to be arranged on the fluid channel of the leakage pipeline, and the sealing member has a closed position for blocking the fluid channel, and an open position for connecting the fluid channel.

[0005] It also includes: a driving member connected to the sealing member, driving the sealing member to move toward the inner cavity of the valve body to close the leakage feed port; and a biasing member connected to the sealing member, applying a biasing force toward the sealing member to move it toward the open position.

[0006] The driving member is an air pump connected to the inner cavity of the valve body, and the air pump introduces a medium into the valve body to drive the sealing member to move to the closed position.

[0007] The biasing member is a spring connected to the sealing member and the inner cavity of the valve body respectively.

[0008] The spring is a compression spring sleeved on the sealing member; the inner cavity of the valve body is provided with an annular cavity, the sealing member is provided with an annular boss, one end of the compression spring is accommodated in the annular cavity, and the other end of the compression spring is abutted and connected with the annular boss.

[0009] A tank bottom valve with an anti-leakage detection device comprises: the anti-leakage detection device described above; a tank bottom valve body; a tank bottom valve core, disposed in the tank bottom valve body and driven to reciprocate; and the retention chamber is disposed on the tank bottom valve core.

[0010] It also includes: a cylinder, which is arranged below the valve body of the tank bottom valve; a piston ring, which is arranged in the cylinder and connected to the valve core of the tank bottom valve; a biasing member, which is respectively connected to the piston ring and the cylinder, and the biasing member applies a biasing force toward the piston ring to move it toward the material port to achieve closing of the material port; an air pump; a medium is passed into the cylinder to compress the biasing member to achieve opening of the material port.

[0011] The anti-leakage detection device also includes: a driving member connected to the sealing member, driving the sealing member to move toward the inner cavity of the valve body to close the leakage feed port; the driving member is an air pump connected to the valve body and the inner cavity of the cylinder respectively through a three-way joint.

[0012] One end of the tank bottom valve core facing the material port is a plane flush with the outer contour edge of the material port.

[0013] The tank bottom valve core is provided with annular sealing rings respectively located at the upper and lower sides of the retention cavity and arranged along the circumferential direction of the tank bottom valve core.

[0014] The technical solution of the present invention has the following advantages:

[0015] 1. The present invention provides a leak detection device, comprising: a valve body; a liquid leakage line disposed within the valve body, the liquid leakage line comprising: a liquid leakage inlet communicating with a retention chamber disposed circumferentially of a valve core of a tank bottom valve of a storage tank, and a liquid leakage outlet for detecting leakage of a medium; a seal drivenly disposed on a fluid passage of the liquid leakage line, the seal having a closed position blocking the fluid passage and an open position connecting the fluid passage. During actual use of the tank bottom valve, the valve core repeatedly opens and closes the material port, which can cause wear of the sealing ring over time, leading to leakage after the valve core and valve are closed. However, in the prior art, leakage is only detected visually after the tank bottom valve body has significantly leaked liquid, resulting in leakage of the liquid within the storage tank, wasting material, and increasing costs for the manufacturer. Furthermore, when the tank bottom valve body leaks, the leaked liquid can mix with other liquids within the tank bottom valve body, causing cross-contamination of the liquids. In this solution, when the tank bottom valve leaks, the material will flow into the retention chamber, then into the leakage pipeline through the leakage inlet, and out of the leakage outlet used to detect whether the medium is leaking. By detecting the leakage outlet, it can be determined in advance whether the valve core can effectively seal. Through this arrangement, it is possible to detect whether the tank bottom valve is leaking before the leaking material enters the inner cavity of the valve body, so that measures such as replacing the sealing ring can be taken in a timely manner, thereby improving the sealing effect of the tank bottom valve core, thereby preventing material waste and saving merchants costs. In addition, it can also prevent the occurrence of cross-contamination of liquids.

[0016] 2. The present invention provides an anti-leakage detection device, further comprising: a driving member connected to the sealing member, driving the sealing member to move toward the inner cavity of the valve body to close the leakage feed port; a biasing member connected to the sealing member, applying a biasing force toward the sealing member to cause it to move toward the open position; when the tank bottom valve is opened, the driving member drives the sealing member to move toward the inner cavity of the valve body to close the leakage feed port; at this time, the material will flow from the tank bottom valve material port into the tank bottom valve body, and then flow into other flow channels; when the tank bottom valve material port is closed, the driving member does not drive the sealing member to move toward the inner cavity of the valve body, the biasing member is connected to the sealing member, applying a biasing force toward the sealing member to cause it to move toward the open position, the sealing member moves to the open position, and the leakage feed port is communicated with the retention chamber. The above-mentioned biasing member can make the fluid channel remain in the open position without being affected by external forces and without power supply, effectively corresponding to the closed state of the tank bottom valve, and monitoring the leakage state of the tank bottom valve in real time. Moreover, the driving mode is simple and reliable. Once material leakage is found, it can be detected through the discharge port. The above setting mode can conveniently and quickly detect whether the tank bottom valve is leaking.

[0017] 3. The present invention provides an anti-leakage detection device, wherein the driving member is an air pump connected to the inner cavity of the valve body. The air pump introduces a medium into the valve body to drive the seal to move to the closed position. The air pump generates gas to generate a driving force on the seal, and the driving force is used to drive the seal toward the inner cavity of the valve body to close the leakage feed port. The device is simple and convenient to install and easy to operate.

[0018] 4. The present invention provides a leak detection device, wherein the biasing member is a spring connected to the sealing member and the inner cavity of the valve body. When the sealing member closes the leaking liquid feed port, and when the air pump is not compressing gas, the sealing member can be simply reset by elastic deformation of the spring, thereby quickly opening the leaking liquid feed port, ensuring continuity between the leaking liquid feed port and the leaking liquid pipeline, and ensuring that the leak detection device can detect whether material is leaking.

[0019] 5. The present invention provides an anti-leakage detection device, wherein the spring is a compression spring sleeved on the sealing member; the inner cavity of the valve body is provided with an annular cavity, and the sealing member is provided with an annular boss, one end of the compression spring is accommodated in the annular cavity, and the other end of the compression spring is abutted and connected with the annular boss. By sleeved on the sealing member, the compression spring can apply force to the sealing member evenly without causing force deviation, thereby improving the efficiency of the sealing member.

[0020] 6. The present invention provides a tank bottom valve with an anti-leakage detection device, comprising the anti-leakage detection device described above; and a tank bottom valve body; a tank bottom valve spool, which is arranged in the tank bottom valve body and is driven to reciprocate; the retention chamber is arranged on the tank bottom valve spool; the retention chamber is arranged on the tank bottom valve spool, and when the tank bottom valve spool and the material port are closed, the retention chamber is connected to the leakage feed port. When the tank bottom valve material leaks, the material will enter the leakage pipeline through the leakage feed port and flow out of the leakage outlet for detecting whether the medium has leakage. Through the above-mentioned arrangement, whether the tank bottom valve is leaking can be detected before the leaking material enters the valve body, thereby achieving the effect of rapid leak detection.

[0021] 7. The present invention provides a tank bottom valve with an anti-leakage detection device, which also includes: a cylinder, which is arranged below the tank bottom valve body; a piston ring, which is arranged in the cylinder and connected to the tank bottom valve core; a biasing member, which is respectively connected to the piston ring and the cylinder, and the biasing member applies a biasing force toward the piston ring to make it move toward the material port to close the material port; an air pump; a medium is passed into the cylinder to compress the biasing member to open the material port, and gas is generated by the air pump and passed into the cylinder to generate a driving force on the piston ring, and then the tank bottom valve core is pulled downward by the piston ring, thereby opening the material port and sending the material into the tank bottom valve body. When the air pump does not generate gas, the biasing member applies a biasing force toward the piston ring to make it move toward the material port to close the material port. The material port can be opened and closed simply and conveniently through the above-mentioned component arrangement.

[0022] 8. The present invention provides a tank bottom valve with an anti-leakage detection device, the anti-leakage detection device further comprising: a driving member connected to the sealing member, driving the sealing member to move toward the inner cavity of the valve body to close the leakage feed port; the driving member is an air pump connected to the valve body and the inner cavity of the cylinder through a three-way joint; the air pump generates gas and passes it into the three-way joint, the driving force generated by the gas can simultaneously drive the sealing member and the cylinder to move, when the sealing member is driven to move toward the inner cavity of the valve body to close the leakage feed port; when the leakage feed port is closed, the driving force generated by the gas drives the piston ring in the cylinder to open the material port, so that when the material port is opened, the material can be prevented from entering the leakage pipeline through the leakage feed port, causing leakage detection errors. The three-way joint simultaneously ventilates the inner cavity of the tank bottom valve and the inner cavity of the anti-leakage detection device, which can effectively block the conduction of the leakage pipeline when the tank bottom valve is opened, ensuring that the anti-leakage detection device is in a stopped working state, and preventing the anti-leakage detection device from affecting the normal operation of the tank bottom valve.

[0023] 9. The present invention provides a tank bottom valve with an anti-leakage detection device. The end of the tank bottom valve core facing the material port is a plane flush with the outer contour edge of the material port. Through the arrangement of the plane, there is no sanitary dead corner at the junction of the tank bottom valve material leak and the tank bottom valve core, making it difficult for bacteria to breed.

[0024] 10. The present invention provides a tank bottom valve with an anti-leakage detection device, wherein the valve core of the tank bottom valve is provided with annular sealing rings respectively located on the upper and lower sides of the retention chamber and arranged along the circumferential direction of the valve core of the tank bottom valve. The annular sealing rings arranged on the upper and lower sides of the retention chamber and along the circumferential direction of the valve core of the tank bottom valve can ensure good sealing between the valve core of the tank bottom valve and the material port when closed, thereby improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the tank bottom valve structure provided by the present invention;

[0027] Figure 2 A schematic structural diagram of the anti-leakage detection device provided by the present invention;

[0028] Description of reference numerals:

[0029] 1-valve body; 2-leakage liquid inlet; 3-leakage liquid outlet; 4-sealing element; 5-biasing element; 6-leakage liquid retention chamber; 8-material port; 9-tank bottom valve core; 10-cylinder; 11-piston ring; 13-leakage liquid pipeline; 14-annular sealing ring; 15-retention chamber; 16-tank bottom valve body; 17-annular cavity; 18-annular boss; 19-tee joint. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Example 1

[0035] A leak detection device is described, such as Figure 1 、 Figure 2 As shown, it includes: a valve body 1; a leakage pipeline 13, which is arranged in the valve body 1, and the leakage pipeline 13 includes: a leakage feed port 2 connected to a retention cavity 15 arranged in the circumferential direction of the valve core 9 of the tank bottom valve of the storage tank, and a leakage discharge port 3 for detecting whether there is leakage in the medium; a sealing member 4, which is driven to be arranged on the fluid channel of the leakage pipeline, and the sealing member 4 has a closed position for blocking the fluid channel and an open position for connecting the fluid channel; in actual use of the tank bottom valve, since the valve core repeatedly realizes the opening action and the closing action of the material port 8, it will cause wear of the sealing ring over time, resulting in leakage after the valve core and the valve are closed. However, in the prior art, the tank bottom valve is only leaking after the tank bottom valve body has seriously leaked liquid, and the inspector can only detect the leakage of the tank bottom valve through naked eye observation, which causes the liquid in the storage tank to leak out, resulting in material waste and increased costs for merchants. In addition, when the tank bottom valve body leaks, the leaked liquid will mix with other liquids in the tank bottom valve body, causing the problem of liquid cross contamination. In this solution, when the tank bottom valve leaks, the material will flow into the retention cavity 15, then enter the leakage pipeline 13 through the leakage feed port 2, and flow out of the leakage outlet 3 for detecting whether the medium has leaked. By detecting the leakage outlet 3, it can be determined in advance whether the valve core can play an effective sealing effect. Through the above-mentioned setting method, it is possible to detect whether the tank bottom valve is leaking before the leaking material enters the valve body cavity, so that measures such as replacing the sealing ring can be taken in time, thereby improving the sealing effect of the tank bottom valve core 9, thereby preventing material waste and saving merchants' costs, and also preventing the problem of liquid cross contamination.

[0036] Among them, it also includes: a driving member, connected to the sealing member 4, driving the sealing member 4 to move toward the inner cavity of the valve body 1 to close the leakage feed port 2; a biasing member 5, connected to the sealing member 4, applying a biasing force toward the sealing member 4 to move it toward the open position; when the tank bottom valve is opened, the driving member drives the sealing member 4 to move toward the inner cavity of the valve body 1 to close the leakage feed port 2; at this time, the material will flow from the tank bottom valve material port 8 into the tank bottom valve body 16, and then flow into other flow channels When the material port 8 of the tank bottom valve is closed, the driving member does not drive the sealing member 4 to move toward the inner cavity of the valve body 1. The biasing member 5 is connected to the sealing member 4 and applies a biasing force toward the sealing member 4 to move it toward the open position. The sealing member 4 moves to the open position, and the leakage feed port 2 is communicated with the retention chamber 15. The biasing member 5 can keep the fluid channel in the open position without being affected by external forces and without power supply, effectively corresponding to the closed state of the tank bottom valve and monitoring the leakage state of the tank bottom valve in real time. Moreover, the driving method is simple and reliable. Once material leakage is found, it can be detected through the discharge port 3. The above-mentioned setting method can quickly and conveniently detect whether the tank bottom valve is leaking; wherein, the driving member is an air pump connected to the inner cavity of the valve body 1, and the air pump introduces a medium into the valve body 1 to drive the seal 4 to move to the closed position, and generates gas through the air pump to generate a driving force for the seal 4, which drives the seal 4 toward the inner cavity of the valve body 1 to close the leakage feed port 2. The device is simple, convenient and easy to install, and easy to operate. The biasing member 5 is a spring connected to the seal 4 and the inner cavity of the valve body 1 respectively. When the sealing member 4 closes the leakage liquid feed port 2, when the air pump does not compress the gas, the sealing member 4 can be simply reset by the elastic deformation of the spring, thereby achieving the effect of quickly opening the leakage liquid feed port 2, ensuring the conduction between the leakage liquid feed port 2 and the leakage liquid pipeline 13, and ensuring that the anti-leakage detection device can detect whether there is material leakage. The spring is a compression spring sleeved on the sealing member 4; the inner cavity of the valve body 1 is provided with an annular cavity 17, and the sealing member 4 is provided with an annular boss 18, one end of the compression spring is accommodated in the annular cavity 17, and the other end of the compression spring is abutted and connected with the annular boss 18. By sleeved on the compression spring, the compression spring can apply force to the sealing member 4 evenly without causing force deviation, thereby reducing the efficiency of the sealing member 4.

[0037] This embodiment also describes a tank bottom valve with an anti-leakage detection device, including the anti-leakage detection device described above; and a tank bottom valve body 16; a tank bottom valve core 9, which is arranged in the tank bottom valve body 16 and is driven to reciprocate; the retention chamber 15 is arranged on the tank bottom valve core 9; the retention chamber 15 is arranged on the tank bottom valve core 9, and when the tank bottom valve core 9 and the material port 8 are closed, the retention chamber 15 is connected to the leakage feed port 2. When the tank bottom valve material leaks, the material will enter the leakage pipeline 13 through the leakage feed port 2 and flow out of the leakage outlet 3 for detecting whether the medium is leaking. Through the above-mentioned setting method, it is possible to detect whether the tank bottom valve is leaking before the leaking material enters the valve body, thereby achieving the effect of rapid leak detection.

[0038] Among them, the tank bottom valve with an anti-leakage detection device also includes: a cylinder 10, which is arranged below the tank bottom valve body 16; a piston ring 11, which is arranged in the cylinder 10 and connected to the tank bottom valve core 9; a biasing member 5, which is respectively connected to the piston ring 11 and the cylinder 10, and the biasing member 5 applies a biasing force toward the piston ring 11 to move it toward the material port 8 to achieve closing of the material port 8; an air pump; a medium is passed toward the cylinder 10 to compress the biasing member 5 to achieve closing of the material port 8 is opened, gas is generated by the air pump and passed into the cylinder 10, generating a driving force on the piston ring 11, and then the tank bottom valve core 9 is pulled downward by the piston ring 11, thereby opening the material port 8 and sending the material into the tank bottom valve body 16. When the air pump does not generate gas, the biasing member 5 applies a biasing force toward the piston ring 11 to move it toward the material port 8, thereby closing the material port 8. The above-mentioned component arrangement can simply and conveniently open and close the material port 8.

[0039] Among them, the anti-leakage detection device also includes: a driving member, connected to the sealing member 4, driving the sealing member 4 to move toward the inner cavity of the valve body 1 to close the leakage feed port 2; the driving member is an air pump connected to the valve body 1 and the inner cavity of the cylinder 10 respectively through the three-way joint 19; gas is generated by the air pump and passed into the three-way joint 19, and the driving force generated by the gas can simultaneously drive the sealing member 4 and the cylinder 10 to move, when the sealing member 4 is driven to move toward the inner cavity of the valve body 1 to close the leakage feed port 2; the leakage feed port 2 is closed, and the driving force generated by the gas drives the piston ring 11 in the cylinder to open the material port 8, so as to avoid the material from entering the leakage pipeline 13 through the leakage feed port 2 when the material port 8 is opened, causing leakage detection errors. By simultaneously ventilating the inner cavity of the tank bottom valve and the inner cavity of the valve body 1 of the anti-leakage detection device through the above-mentioned three-way joint 19, it is possible to effectively automatically block the conduction of the leakage pipeline 13 when the tank bottom valve is opened, thereby ensuring that the anti-leakage detection device is in a stopped working state and preventing the anti-leakage detection device from affecting the normal operation of the tank bottom valve.

[0040] In addition, the end of the tank bottom valve core 9 facing the material port 8 is a plane flush with the outer contour edge of the material port 8. Through the setting of the plane, there is no sanitary dead corner at the junction of the tank bottom valve material leak 8 and the tank bottom valve core 9, so it is not easy to breed bacteria.

[0041] The tank bottom valve core 9 is provided with annular sealing rings 14 respectively located on the upper and lower sides of the retention cavity 15 and arranged along the circumferential direction of the tank bottom valve core 9. The annular sealing rings 14 arranged on the upper and lower sides of the retention cavity 15 and along the circumferential direction of the tank bottom valve core 9 can ensure good sealing between the tank bottom valve core 9 and the material port 8 when closed, thereby improving the sealing effect.

[0042] Of course, the present invention does not specifically limit the specific type of the biasing member 5. It can also be in various forms such as a compression spring, a torsion spring, an electromagnetic relay, etc., which can generate a biasing force applied toward the piston ring 11 to move it toward the material port 8 to achieve the closure of the material port 8, or apply a biasing force toward the sealing member 4 to move it toward the open position.

[0043] Of course, the present invention does not specifically limit the specific type of the driving member. In addition to the air pump, it can also be a variety of mechanical push rods such as a lever and a four-bar structure, which can generate a driving force to drive the sealing member 4 toward the inner cavity of the valve body 1 to close the leakage feed port 2 or drive the biasing member 5 to be compressed to achieve the driving force to open the material port 8.

[0044] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A tank bottom valve with an anti-leakage detection device, characterized in that: include: Valve body (1); A liquid leakage pipeline is arranged in the valve body (1), and the liquid leakage pipeline comprises: a liquid leakage feed port (2) connected to a retention cavity (15) arranged in a circumferential direction of a valve core (9) of a tank bottom valve of the storage tank, and a liquid leakage discharge port (3) for detecting whether a medium has leaked; A sealing member (4) is driven and arranged on the fluid passage of the leakage pipeline, and the sealing member (4) has a closed position for blocking the fluid passage and an open position for connecting the fluid passage; Tank bottom valve body (16); The tank bottom valve core (9) is arranged in the tank bottom valve body (16) and is driven to reciprocate; the retention chamber (15) is arranged on the tank bottom valve core (9); when the tank bottom valve core (9) is closed, the retention chamber (15) is communicated with the leakage liquid feed port (2), and the sealing member (4) moves to the open position; when the tank bottom valve core (9) is opened, the sealing member (4) moves to the closed position.

2. The tank bottom valve with a leakage prevention detection device according to claim 1, characterized in that: Also includes: a driving member connected to the sealing member (4) and driving the sealing member (4) to move toward the inner cavity of the valve body (1) to close the leakage liquid feed port (2); A biasing member (5) is connected to the sealing member (4) and applies a biasing force toward the sealing member (4) to move the sealing member toward the open position.

3. The tank bottom valve with a leakage prevention detection device according to claim 2, characterized in that: The driving member is an air pump connected to the inner cavity of the valve body (1), and the air pump introduces a medium into the valve body (1) to drive the sealing member (4) to move to the closed position.

4. The tank bottom valve with a leakage prevention detection device according to claim 2 or 3, characterized in that: The biasing member (5) is a spring connected to the sealing member (4) and the inner cavity of the valve body (1) respectively.

5. The tank bottom valve with a leakage prevention detection device according to claim 4, characterized in that: The spring is a compression spring sleeved on the sealing member (4); the inner cavity of the valve body (1) is provided with an annular cavity, the sealing member (4) is provided with an annular boss, one end of the compression spring is accommodated in the annular cavity, and the other end of the compression spring is abutted and connected with the annular boss.

6. The tank bottom valve with a leak detection device according to claim 1, characterized in that: Also includes: A cylinder (10) is arranged below the tank bottom valve body (16); A piston ring (11) is disposed in the cylinder (10) and connected to the valve core (9) of the tank bottom valve; a biasing member (5), the biasing member (5) being connected to the piston ring (11) and the cylinder (10), respectively, and the biasing member (5) applying a biasing force toward the piston ring (11) to move the piston ring toward the material port (8) to close the material port (8); an air pump; and introducing a medium into the cylinder (10) to compress the biasing member (5) so as to open the material port (8).

7. The tank bottom valve with a leak detection device according to claim 6, characterized in that: The anti-leakage detection device further comprises: a driving member connected to the sealing member (4) for driving the sealing member (4) to move toward the inner cavity of the valve body (1) to close the leakage liquid feed port (2); The driving member is an air pump which is respectively connected to the valve body (1) and the inner cavity of the cylinder (10) through a three-way joint.

8. The tank bottom valve with a leakage prevention detection device according to claim 6 or 7, characterized in that: One end of the tank bottom valve core (9) facing the material port (8) is a plane flush with the outer contour edge of the material port (8).

9. The tank bottom valve with a leakage prevention detection device according to claim 6 or 7, characterized in that: The tank bottom valve core (9) is provided with an annular sealing ring (14) located at the upper and lower sides of the retention cavity (15) and arranged along the circumferential direction of the tank bottom valve core (9).

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