Anti-pressure differential fireproof floor drain core device and anti-pressure differential fireproof floor drain core device test device

Abstract

The present invention discloses a pressure differential fireproof floor drain core device and a pressure differential fireproof floor drain core device test device. The pressure differential fireproof floor drain core device includes a main body, a float and a sealing assembly. The main body includes a base and a cavity installed on the base. The base includes a top wall, and a first tubular portion and a second tubular portion protruding from the upper and lower ends of the top wall. The first tubular portion and the second tubular portion are coaxially arranged and the inner cavities of the two are connected. The float is installed in the inner cavity of the cavity, and the bottom of the float is used to seal the first tubular portion. The sealing assembly is connected to the base and is used to seal the second tubular portion. The device can be directly installed at the installation position of the original fireproof floor drain without changing the on-site civil engineering structure. Whether the floor drain liquid can be sucked away or sprayed out in a room with a pressure difference can achieve the integrity of the fire partition. In addition, it can also realize the function of solving multiple working conditions (without considering the positive and negative pressure of the room) with a single floor drain solution type. It has a wide range of applications and strong applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of power plants, in particular to a pressure differential proof fireproof floor drain core device and a pressure differential proof fireproof floor drain core device test device. Background Art

[0002] like Figure 1 As shown, most nuclear power plants currently use conventional floor drain devices 10 for fireproof floor drains. This floor drain device 10 may include a cavity and a pipe 11 connected to the cavity. The cavity forms a storage space 12. According to the fire zoning isolation requirements, firefighting floor drain fluid is added to a portion of the volume space 12 to form a water seal to ensure the integrity of the fire zoning. Due to the large pressure difference between the interior of the room and the drain pipe and the limited height of the water seal, the floor drain fluid in some areas may be sucked away (due to strong positive pressure in the room) or sprayed out of the floor drain (due to strong negative pressure in the room). This problem causes the floor drain fluid height to fail to meet design requirements and fire zoning management regulations, affecting the fire-retardant and anti-odor functions of the floor drain. At the same time, the frequent addition of floor drain fluid increases the amount of floor drain fluid used, increasing the subsequent investment costs. If the U-shaped water seal needs to be modified, it involves many types and quantities, which is difficult to implement and costly.

[0003] At present, products without fireproof floor drains can solve the problem of fire partitions being destroyed when the room is under large positive and negative pressure. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a pressure differential proof fireproof floor drain core device and a pressure differential proof fireproof floor drain core device test device.

[0005] The technical solution adopted by the present invention to solve the technical problem is: constructing a pressure difference proof fireproof floor drain core device, including a main body, a float and a sealing assembly;

[0006] The main body includes a base and a cavity mounted on the base, the base includes a top wall, and a first tubular portion and a second tubular portion protruding from the upper and lower ends of the top wall, the first tubular portion and the second tubular portion are coaxially arranged and the inner cavities of the first tubular portion and the second tubular portion are connected;

[0007] The float is installed in the inner cavity of the cavity, and the bottom of the float is used to seal the first tubular portion;

[0008] The sealing assembly is connected to the base and is used for sealing the second tubular portion.

[0009] In some embodiments, the bottom of the float is a sealing portion, the sealing portion has a sealing surface, and the sealing surface is a curved surface.

[0010] In some embodiments, an annular portion is further provided at the bottom of the float, the inner diameter of the annular portion is larger than the outer diameter of the first tubular portion, so that it is sleeved on the outer circumference of the first tubular portion, and the inner circumference of the annular portion and the outer circumference of the first tubular portion form a liquid-sealed space.

[0011] In some embodiments, the inner circumference of the upper end of the first tubular portion is a curved surface.

[0012] In some embodiments, the base further includes a side wall extending downwardly from the top wall;

[0013] The sealing assembly includes a sealing cover which is rotatably mounted on the side wall to seal or conduct the second tubular portion.

[0014] In some embodiments, the side wall has a notch, the first end of the sealing cover is rotatably mounted on the notch via a rotating shaft, and a counterweight is provided at the first end of the sealing cover.

[0015] In some embodiments, the pressure difference proof fireproof floor drain core device further includes a guide frame, the guide frame is arranged in the inner cavity of the cavity, and the float is movably installed in the guide frame.

[0016] In some embodiments, a limiting groove is provided on the top wall for installation of the lower end of the guide frame.

[0017] In some embodiments, the pressure differential proof fireproof floor drain core device further includes a lap joint portion provided on an upper edge of the cavity.

[0018] The present invention further provides a pressure differential fireproof floor drain core device test device, which is used to test the pressure differential fireproof floor drain core device described in any of the above embodiments, comprising a bracket, an airflow component and a water flow component;

[0019] The bracket is used for installing the pressure difference proof fireproof floor drain core device, and the airflow component includes a first air path, a second air path, and a pressure stabilizing container;

[0020] The first gas path and the second gas path are both connected to the pressure-stabilizing container, and the pressure-stabilizing container is connected to the upper end of the bracket;

[0021] The first air circuit includes a first air pump and an air intake valve connected in sequence, one end of the air intake valve is connected to the first air pump and the other end is connected to the pressure-stabilizing container; the second air circuit includes a second air pump and an air intake valve connected in sequence, one end of the air intake valve is connected to the second air pump and the other end is connected to the pressure-stabilizing container; the pressure-stabilizing container is provided with a first differential pressure gauge and an exhaust port;

[0022] The water flow component includes a water supply pipeline connected to the upper end of the bracket and a drainage pipeline connected to the lower end of the bracket.

[0023] The implementation of the present invention has the following beneficial effects: the pressure difference anti-fireproof floor drain core device of the present invention can be directly installed at the installation position of the original fireproof floor drain without changing the on-site civil engineering structure. Whether the floor drain liquid can be sucked away or sprayed out in a room with a pressure difference can achieve the integrity of the fire protection partition. In addition, it can also realize the function of solving multiple working conditions (without considering the positive and negative pressure of the room) with one type of floor drain solution, and has a wide range of applications and strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0025] Figure 1 It is a structural diagram of a floor drain core in related technology;

[0026] Figures 2 to 3 Schematic diagram of the structure of the pressure differential proof fireproof floor drain core device in some embodiments of the present invention;

[0027] Figure 4 is a cross-sectional view of a pressure differential proof fireproof floor drain core device in some embodiments of the present invention;

[0028] Figure 5 This is a schematic structural diagram of a pressure differential proof fireproof floor drain core device omitting the cavity in some embodiments of the present invention;

[0029] Figures 6 and 7 is a schematic structural diagram of a base in some embodiments of the present invention;

[0030] Figure 8 is a schematic structural diagram of a floating body in some embodiments of the present invention;

[0031] Figure 9 is a schematic structural diagram of a sealing assembly in some embodiments of the present invention;

[0032] Figure 10 yes Figure 9 Exploded view of the seal assembly in the;

[0033] Figure 11 is a schematic structural diagram of a guide frame in some embodiments of the present invention;

[0034] Figure 12 It is a structural schematic diagram of a test device for a pressure differential proof fireproof floor drain core device in some embodiments of the present invention. DETAILED DESCRIPTION

[0035] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0036] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0037] In the following description, specific details such as particular system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0038] See also Figures 2 to 11 The present invention shows a pressure differential and fireproof floor drain core device 20, which includes a main body 21, a float 22 and a sealing assembly 23.

[0039] The main body 21 may include a base 211 and a cavity 212 mounted on the base 211. The base 211 includes a top wall 2111 and a first tubular portion 2113 and a second tubular portion 2114 protruding from the upper and lower ends of the top wall 2111. The first tubular portion 2113 and the second tubular portion 2114 are coaxially arranged and the inner cavities of the first tubular portion 2113 and the second tubular portion 2114 are connected.

[0040] The float 22 is installed in the inner cavity of the cavity 212, and the bottom of the float 22 is used to seal the first tubular portion 2113 and, under the action of force, move away from the first tubular portion 2113 so that liquid can flow into the first tubular portion 2113;

[0041] The sealing assembly 23 is connected to the base 211 and is used to seal the second tubular portion 2114 and, under the action of force, move away from the second tubular portion 2114 so that liquid can flow into the second tubular portion 2113 and flow downstream from the first tubular portion 2113.

[0042] It can be understood that the pressure difference proof fireproof floor drain core device 20 can be directly installed at the installation position of the original fireproof floor drain without changing the on-site civil engineering structure. Whether the floor drain liquid can be sucked away or sprayed out in a room with a pressure difference can achieve the integrity of the fire protection partition. In addition, it can also realize the function of solving multiple working conditions (without considering the positive and negative pressure of the room) with one type of floor drain solution, which has a wide range of applications and strong applicability.

[0043] In some embodiments, the cavity 212 may be a circular tube structure, the length of which is greater than the length of the float 22 , so that the cavity 212 has a sufficiently large inner cavity for the float 22 to move.

[0044] In some embodiments, the float 22 is generally a columnar structure, including but not limited to a cylindrical structure. It can be a solid columnar structure or a hollow columnar structure, or the float 22 has an inner cavity, which can be filled with foam blocks, etc. Preferably, the float 22 can be made of a metal material, such as stainless steel, aluminum, or an aluminum alloy.

[0045] The bottom of the float 22 is a sealing portion 221 . The sealing portion 221 has a sealing surface that is a curved surface.

[0046] Preferably, the inner circumference of the upper end of the first tubular portion 2113 is a curved surface to facilitate cooperation with the sealing portion 221 .

[0047] In some embodiments, the bottom of the float 22 is further provided with an annular portion 222, the inner diameter of the annular portion 222 is larger than the outer diameter of the first tubular portion 2113, so that it is sleeved on the outer periphery of the first tubular portion 2113, and the inner periphery of the annular portion 222 and the outer periphery of the first tubular portion 2113 form a liquid-sealed space A.

[0048] See Figure 9 and Figure 10 In some embodiments, the base 211 further includes a side wall 2112 extending downward from the top wall 2111 , and the sealing assembly 23 includes a sealing cover 231 , which can be rotatably mounted on the side wall 2112 to seal or conduct the second tubular portion 2114 .

[0049] Furthermore, the side wall 2112 has a notch, and the first end of the sealing cover 231 is rotatably mounted at the notch via a rotating shaft 232, and a counterweight 233 is provided at the first end of the sealing cover 231. It is understandable that the sealing assembly 23 uses a lever structure to rotate the sealing cover 231, and the initial state of the sealing cover 231 is to seal the second tubular portion 2113. The shape and mass of the counterweight 233 can be selected and set according to actual needs and are not specifically limited here. Preferably, the sealing cover 231 can be made of a metal material such as aluminum or an aluminum alloy. The rotating shaft 232 and the counterweight 233 can be made of a metal material such as stainless steel.

[0050] See Figure 11 The pressure differential fireproof floor drain core device 20 further includes a guide frame 24, which is provided in the inner cavity of the cavity 212, and the float 22 is movably installed in the guide frame 24. Preferably, the guide frame 24 can be made of stainless steel, such as 304 stainless steel.

[0051] Preferably, the guide frame 24 may include a first annular body 241 and a second annular body 242 that are relatively arranged, and a plurality of connecting bodies 243 connecting the first annular body 241 and the second annular body 242. The outer periphery of the first annular body 241 and / or the second annular body 242 may also be provided with a protrusion 244 to abut against the inner side surface of the cavity 212, or be welded to the inner side surface of the cavity 212.

[0052] Preferably, a limiting groove B is provided on the top wall 2111 for mounting the lower end of the guide frame 24. Preferably, the lower end of the guide frame 24 can be welded to the top wall 2111.

[0053] Furthermore, a step may be provided on the upper edge of the top wall 2111 to facilitate positioning and installation of the cavity 212. The step is located on the outer circle of the limiting groove B.

[0054] Preferably, the main body 21 can be an integral structure, that is, the base 211 and the cavity 212 can be an integral structure. Alternatively, the base 211 and the cavity 212 can be separate structures, and the two can be connected and fixed by a snap-fit ​​or threaded connection. Preferably, the main body 21 can be made of stainless steel, such as 304 stainless steel.

[0055] In some embodiments, the pressure differential fireproof floor drain core device 20 further includes a lap joint 25 provided on the upper edge of the cavity 212 to overlap the upper edge of the pipe. The lap joint 25 can be an integral structure with the cavity 212, or the two can be separately provided. The lap joint 25 can be a whole annular structure, or can be a plurality of raised structures arranged at intervals. Preferably, the lap joint 25 can be made of stainless steel, such as 304 stainless steel.

[0056] It can be understood that the entire pressure differential fireproof floor drain core device 20 can be directly hung on the upper edge of the drainage pipe on site through the overlapping part 25, and the pressure differential fireproof floor drain core device 20 can be externally sealed with the drainage pipe using a flame retardant sealing gasket or flame retardant sealant.

[0057] It can be understood that the pressure difference anti-fireproof floor drain core device 20 has a three-layer sealing mechanism. From top to bottom, the first layer is the water seal formed between the first tubular part 2113 and the annular part 222, the second layer is the mechanical seal formed by the sealing part 221 and the first tubular part 2113 relying on the gravity of the float 22, and the third layer is the mechanical seal formed by the sealing cover 231 and the second annular part 2114 through the lever principle of the counterweight block 233.

[0058] In this embodiment, the working process of the anti-pressure differential fireproof floor drain core device 20 is as follows:

[0059] According to the characteristics of the on-site environment, it can be divided into three types: (1) there is no pressure difference between the upstream and downstream of the pressure differential fireproof floor drain core device 20, (2) the upstream pressure of the pressure differential fireproof floor drain core device 20 is greater than the downstream pressure, that is, the room is a positive pressure environment, (3) the upstream pressure of the pressure differential fireproof floor drain core device 20 is less than the downstream pressure, that is, the room is a negative pressure environment.

[0060] (1) There is no pressure difference between the upstream and downstream sides of the floor drain, that is, the upstream pressure is approximately equal to the downstream pressure:

[0061] Under normal circumstances, there is a certain amount of residual water in the cavity 212 to form a water seal, but due to the action of gravity, the float 22 will be at the bottom of the cavity 212. At this time, the bottom of the float 22 seals the first tubular part 2113 to achieve the upstream sealing of the floor drain; the sealing cover 231 is located at the top through the gravity of the counterweight block 233 through a lever. At this time, the sealing cover 231 seals the second tubular part 2114 to achieve the downstream sealing of the floor drain. Under normal circumstances where there is no water upstream, water seal + double mechanical seal can be achieved.

[0062] When water comes from upstream, the water level in the cavity 11 continues to rise, generating buoyancy on the float 22. When the buoyancy can overcome the weight of the float 22, the float 22 is lifted, driving the bottom of the float 22 away from the first tubular portion 2113. At this time, the first tubular portion 2113 is in an open state, and the upstream water can flow through the first tubular portion 2113 to the sealing cover 231. Due to the gravity of the water, the sealing cover 231 will be triggered to open, and the water can be drained normally. When the water is drained, the float 22 and the sealing cover 231 return to the closed state under normal circumstances.

[0063] (2) The upstream pressure of the floor drain is greater than the downstream pressure

[0064] Under normal circumstances, the float 22 is subjected to the gravity + positive pressure of the room, and the first tubular portion 2113 is in a closed state. The sealing cover 231 is in a closed state due to the gravity of the counterweight block 233.

[0065] In the case of water coming from upstream, when the buoyancy of water on the float 22 is greater than the gravity and the positive pressure generated by the room, the float 22 rises, driving the bottom of the float 22 away from the first tubular portion 2113. At this time, the first tubular portion 2113 is in an open state, and the upstream water can flow through the first tubular portion 2113 to the sealing cover 231. Due to the gravity of the water, the sealing cover 231 will be triggered to open, and the water can be drained normally. When the water is drained, the float 22 and the sealing cover 231 return to the closed state under normal circumstances.

[0066] (3) The upstream pressure of the floor drain is lower than the downstream pressure

[0067] Under normal circumstances, the sealing cover 231 is closed to the second tubular portion 2114 due to the force of gravity and the positive pressure downstream of the floor drain. The first tubular portion 2113 is closed due to the force of the float 22 and its own gravity.

[0068] In the case of water coming from upstream, when the buoyancy of water on the float 22 is greater than the gravity of the float 22 itself, the first tubular part 2113 will be triggered to open. When the gravity of water on the sealing cover 231 is greater than the force transmitted to the sealing cover 231 by the counterweight block 233 + the negative pressure generated downstream of the floor drain, the sealing cover 231 will open to drain water, and return to normal state after drainage is completed.

[0069] Understandably, before this, nuclear power fireproof floor drains all used the method of adding fireproof floor drain fluid to form a water seal to achieve fire compartmentation. Due to the large pressure difference between the interior of the room and the drain pipe and the limited height of the water seal, the floor drain fluid in some areas would be sucked away (the room has a strong positive pressure) or sprayed out of the floor drain (the room has a strong negative pressure), and the fire compartmentation would be destroyed.

[0070] The pressure differential fireproof floor drain core device 20 of the present invention prevents frequent spraying or suction of floor drain fluid, ensuring normal floor drainage in the room without the need for frequent replenishment of floor drain fluid to ensure the integrity of the fire compartment. This reduces the cost of dedicated fireproof floor drain fluid, the labor cost of constantly replenishing fireproof floor drain fluid, and the cost and risk of renovation, thereby avoiding the risk of fire compartments failing to meet specifications due to a lack of fireproof floor drain fluid.

[0071] It can be understood that the pressure difference proof fireproof floor drain core device 20 has the following advantages: simple structure, few parts, and easy maintenance.

[0072] The device can not only realize the anti-odor and normal drainage functions of conventional floor drains, but also realize the fire retardant function, and can also realize mechanical water sealing under different pressure difference environments.

[0073] The whole is made of metal with stable structure, which can prevent and isolate fire.

[0074] The size of the float 22, the outer diameter of the cavity 212 and the weight of the counterweight 233 can be adjusted according to the actual site environment. They are easy to replace and can adapt to rooms with different pressure differences and different floor drain pipe diameters.

[0075] A single device can simultaneously realize the basic functions of a fireproof floor drain in a ventilation room with a positive or negative pressure difference, and can adapt to occasions where the on-site environment is constantly changing.

[0076] The overlapping portion 25 can be used for step-type hanging installation, and on-site installation and disassembly are convenient.

[0077] In addition to being specifically used as fireproof floor drains in nuclear power ventilation rooms with fire protection partition requirements, this device can also be used in situations where there are pressure difference environments in the room and there are requirements for anti-odor, fire protection or normal drainage.

[0078] See Figure 12 The present invention also discloses a pressure differential fireproof floor drain core device test device 30, which is used to test the pressure differential fireproof floor drain core device 20, including a bracket 31, an airflow component and a water flow component;

[0079] Among them, the bracket 31 is used for installing the pressure difference and fireproof floor drain core device 20, and the airflow component includes a first air path 32, a second air path 33, and a pressure stabilizing container 34.

[0080] The first gas path 32 and the second gas path 33 are both connected to a pressure stabilizing container 34, and the pressure stabilizing container 34 is connected to the upper end of the bracket 31;

[0081] The first air path 32 includes a first air pump 321 and an air inlet valve 322 connected in sequence. One end of the air inlet valve 322 is connected to the first air pump 321, and the other end is connected to the pressure-stabilizing container 34. The first air pump 321 can be an air pump to pressurize the pressure-stabilizing container 34, thereby increasing the pressure upstream of the bracket 31.

[0082] The second air circuit 33 includes a second air pump 331 and an air intake valve 332 connected in sequence, one end of the air intake valve 332 is connected to the second air pump 331, and the other end is connected to the pressure-stabilizing container 34; the second air pump 331 can be an air extraction pump to extract pressure from the pressure-stabilizing container 34, so that the pressure upstream of the bracket 31 is reduced.

[0083] The pressure stabilizing container 34 is provided with a first differential pressure gauge 341 and an exhaust port 342 ; preferably, the first gas path 32 may also be provided with a second differential pressure gauge 323 at one end close to the pressure stabilizing container 34 .

[0084] The water flow assembly includes a water supply pipeline 35 connected to the upper end of the bracket 31 and a drainage pipeline 36 connected to the lower end of the bracket 31.

[0085] The water supply pipeline 35 may include a water supply pipe 351 , one end of which is connected to the upper end of the bracket 31 , and the other end of which is connected to a water source. A water inlet valve 352 is provided on the water supply pipe 351 .

[0086] The drainage pipeline 36 may include a drainage pipe 361 , one end of which is connected to the lower end of the bracket 31 and the other end of which is connected to the water collection tank. A drainage valve 362 is provided on the drainage pipe 361 .

[0087] The pressure differential proof fireproof floor drain core device test device 30 can simulate the working conditions of the pressure differential proof fireproof floor drain core device 20 last week to verify offline whether the pressure differential proof fireproof floor drain core device 20 meets the requirements.

[0088] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A pressure differential and fireproof floor drain core device, characterized in that: It includes a main body (21), a float (22) and a sealing assembly (23); The main body (21) comprises a base (211) and a cavity (212) mounted on the base (211); the base (211) comprises a top wall (2111), and a first tubular portion (2113) and a second tubular portion (2114) protruding from upper and lower ends of the top wall (2111); the first tubular portion (2113) and the second tubular portion (2114) are coaxially arranged and their inner cavities are connected; The float (22) is installed in the inner cavity of the cavity (212), and the bottom of the float (22) is used to seal the first tubular portion (2113); The sealing assembly (23) is connected to the base (211) and is used to seal the second tubular portion (2114); The bottom of the float (22) is a sealing portion (221), and the sealing portion (221) has a sealing surface, and the sealing surface is a curved surface; The bottom of the float (22) is further provided with an annular portion (222), the inner diameter of which is larger than the outer diameter of the first tubular portion (2113), so as to be sleeved on the outer circumference of the first tubular portion (2113), and the inner circumference of the annular portion (222) and the outer circumference of the first tubular portion (2113) form a liquid-sealed space.

2. The pressure differential and fireproof floor drain core device according to claim 1, characterized in that: The inner circumference of the upper end of the first tubular portion (2113) is a curved surface.

3. The pressure differential and fireproof floor drain core device according to claim 1, characterized in that: The base (211) further includes a side wall (2112) extending downward from the top wall (2111); The sealing assembly (23) comprises a sealing cover (231), and the sealing cover (231) is rotatably mounted on the side wall (2112) to seal or conduct the second tubular portion (2114).

4. The pressure differential and fireproof floor drain core device according to claim 3, characterized in that: The side wall (2112) has a notch, and the first end of the sealing cover (231) is rotatably mounted on the notch via a rotating shaft (232), and a counterweight (233) is provided at the first end of the sealing cover (231).

5. The pressure differential proof fireproof floor drain core device according to any one of claims 1 to 4, characterized in that: The pressure differential-proof fireproof floor drain core device further comprises a guide frame (24), wherein the guide frame (24) is arranged in the inner cavity of the cavity (212), and the float (22) is movably installed in the guide frame (24).

6. The pressure differential and fireproof floor drain core device according to claim 5, characterized in that: A limiting groove is provided on the top wall (2111) for mounting the lower end of the guide frame (24).

7. The pressure differential proof fireproof floor drain core device according to any one of claims 1 to 4, characterized in that: The pressure difference-proof fireproof floor drain core device further comprises an overlapping portion (25) provided on the upper edge of the cavity (212).

8. A pressure differential fireproof floor drain core device test device, used for testing the pressure differential fireproof floor drain core device according to any one of claims 1 to 7, characterized in that: It includes a bracket (31), an air flow component and a water flow component; The bracket (31) is used for installing the pressure differential and fireproof floor drain core device, and the airflow component includes a first air path (32), a second air path (33), and a pressure stabilizing container (34); The first gas path (32) and the second gas path (33) are both connected to the pressure-stabilizing container (34), and the pressure-stabilizing container (34) is connected to the upper end of the bracket (31); The first air circuit (32) includes a first air pump (321) and an air intake valve (322) connected in sequence, one end of the air intake valve (322) is connected to the first air pump (321), and the other end is connected to the pressure-stabilizing container (34); the second air circuit (33) includes a second air pump (331) and an air intake valve (332) connected in sequence, one end of the air intake valve (332) is connected to the second air pump (331), and the other end is connected to the pressure-stabilizing container (34); the pressure-stabilizing container (34) is provided with a first differential pressure gauge (341) and an exhaust port (342); The water flow assembly comprises a water delivery pipeline (35) connected to the upper end of the bracket (31) and a drainage pipeline (36) connected to the lower end of the bracket (31).

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