Fireproof floor drain core

Abstract

The utility model relates to a fireproof floor drain core, which comprises at least one floating ball module, the floating ball module comprises a tubular floating ball module shell and a floating ball arranged in the floating ball module shell, a drain hole is formed at the bottom end of the floating ball module shell, and the diameter of the drain hole is smaller than that of the floating ball. The device can achieve the isolation effects of fire prevention, smoke prevention, gas permeation prevention and the like, and is simple in structure, free of regular water adding, low in cost, few in parts and convenient to maintain and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of floor drains, in particular to a fireproof floor drain core. Background Art

[0002] Fire or explosion caused by open flames in nuclear power plants often lead to the release of radioactive materials into the external environment, thus causing danger to the environment and the public. Therefore, fire prevention plays an important role in nuclear power plants. Nuclear power plants must have sufficient fire prevention capabilities under all circumstances, and various fire prevention measures must be considered and taken in design and operation, including early detection of fire alarms, fire extinguishing or limiting the spread of fire. Therefore, the floor drains used in nuclear power plants must also have fire prevention functions. At present, the fireproof floor drain core of nuclear power plants adopts the conventional U-shaped floor drain core structure.

[0003] If there is a sealing problem with such a setting, it will not only affect the integrity of the fire barrier, but also affect the analysis results of internal flooding accidents. At the same time, due to fire protection requirements, it is necessary to add water to the floor drain regularly. It is a large workload to add water to all the floor drains inside and outside the factory at one time. At the same time, secondary problems will arise during the water addition process due to pressure differences and other issues. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an improved fireproof floor drain core.

[0005] The utility model adopts the following technical solutions:

[0006] A fireproof floor drain core is constructed, comprising at least one float module, wherein the float module comprises a tubular float module shell and a float arranged in the float module shell, a drainage hole is formed at the bottom end of the float module shell, and the drainage hole is smaller than the diameter of the float.

[0007] In some embodiments, the float module shell includes a tubular main body and a tubular partition portion arranged at the bottom end of the main body, the top end of the partition portion is connected to the bottom end of the main body, and the diameter gradually decreases from the top end to the bottom end, and the drainage hole is formed at the bottom end of the partition portion.

[0008] In some embodiments, the float module includes a first float module and a second float module, the first float module includes a first float and a tubular first float module shell, the second float module includes a second float and a tubular second float module shell, the first float module shell is connected to the second float module shell, and the second float is arranged between the first float module shell and the second float module shell, and is located below the first float.

[0009] In some embodiments, the inner diameter of the second float module housing is greater than or equal to the outer diameter of the first float module housing, and the second float module housing is sleeved outside the first float module.

[0010] In some embodiments, the second float module is longer than the first float module.

[0011] In some embodiments, the first float module housing includes a first main body and at least one first limiting portion, and the first limiting portion protrudes outwardly from the outer side of the first main body;

[0012] The outer contour defined by the at least one first limiting portion is larger than the inner contour of the second float module housing.

[0013] In some embodiments, the second float module housing includes a second main body and a second limiting portion, and the second limiting portion protrudes outwardly from the outer side of the second main body.

[0014] In some embodiments, it also includes at least one water seal module that forms a water seal structure by storing water, and the water seal module is connected to the at least one float module.

[0015] In some embodiments, the water seal module includes a water seal module shell, which includes a tubular third main body and a water storage part for storing water to form a water seal, and the third main body is respectively connected to the water storage part and the float module shell.

[0016] In some embodiments, the water storage part is in the form of a double-layer ring with a closed bottom, and its cross section along the axis is in the form of two parallel U-shaped sections spaced apart, its outer ring end is connected to the float module housing, and the inner ring is surrounded to form a third drainage hole;

[0017] The water seal module further comprises a water seal cover, which is arranged on the water storage part and covers the third drainage hole. The water seal cover and the water storage part define a through hole connected to the third drainage hole.

[0018] The utility model has the following advantages:

[0019] The present application sets a float and a drainage hole smaller than the diameter of the float, so that when water seepage is required, the float can float under the buoyancy of the water flow, and the water flows out through the drainage hole. When water seepage is not required, the float is located at the bottom of the float module shell due to its own gravity, covering the drainage hole, thereby blocking the water seepage channel, playing a role of isolation such as fire prevention, smoke prevention, and gas penetration prevention; at the same time, the present application has a simple structure, does not require regular water addition, has low cost, has few parts, and is easy to repair and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 It is a schematic cross-sectional structure diagram of the first float module of the fireproof floor drain core in one embodiment of the utility model;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of the second float module of the fireproof floor drain core in one embodiment of the utility model;

[0023] Figure 3 yes Figure 1 The first float module shown is Figure 2 The schematic cross-sectional structure diagram of the second float module assembled together is shown;

[0024] Figure 4 It is a schematic cross-sectional structure diagram of a water seal module of a fireproof floor drain core in one embodiment of the utility model;

[0025] Figure 5 yes Figure 4 The water seal module shown is Figure 1 The first float module and Figure 2 The cross-sectional structure diagram of the second float module assembled together is shown. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods 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", "rear", "up", "down", "left", "right", "vertical", "horizontal", "bottom", "inside", "inside", "outside", etc. are based on the directions or positional relationships shown in some of the drawings, and are constructed and operated in a specific direction. They are only for the convenience of describing the present technical solution, and do not indicate that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0027] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, 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 intermediate elements. The terms "first", "second", 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 technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0028] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0029] Figures 1 to 3 The fireproof floor drain core in one embodiment of the utility model is shown, which can realize the water seepage function of the existing floor drain core and has good isolation effects such as fire prevention, smoke prevention, and gas penetration prevention. The fireproof floor drain core includes at least one float module 1. The float module 1 includes a float module shell and a float. The float module shell is tubular and constitutes a partial shell of the fireproof floor drain core. The float is arranged in the float module shell and at the bottom end of the float module shell. The bottom end of the float module shell is also formed with a drainage hole, which is smaller than the diameter of the float.

[0030] The present application sets a float and a drainage hole smaller than the diameter of the float, so that when water seepage is required, the float can float under the buoyancy of the water flow, and the water flows out through the drainage hole. When water seepage is not required, the float is located at the bottom of the float module shell due to its own gravity, covering the drainage hole, thereby blocking the water seepage channel, playing the role of fire prevention, smoke prevention, gas penetration prevention, etc. The present application has a simple structure, does not need to add water regularly, has low cost, has few parts, and is easy to repair and replace.

[0031] In some embodiments, the float module housing includes a main body and a barrier portion, wherein the main body and the barrier portion are both arranged in a tubular shape, the barrier portion is arranged at the bottom end of the main body, the top end of the barrier portion is connected to the bottom end of the main body, and a drainage hole is formed at the bottom end.

[0032] Specifically, in this embodiment, the main body is in the shape of a tube with a constant diameter, and the diameter of the barrier portion gradually decreases from the top to the bottom, and the inner diameter of the bottom is the diameter of the drainage hole.

[0033] By setting up a funnel-shaped barrier, the float can be naturally positioned and smoothly moved to the bottom of the barrier to cover the drainage hole when the water flow gradually decreases and disappears, avoiding the situation of incomplete sealing, so as to ensure the isolation effect. At the same time, when encountering earthquakes, it can also avoid the deformation of the extrusion structure. After the float stops vibrating, it can automatically fall into the covered drainage hole, which has a good earthquake-resistant effect.

[0034] In some other optional embodiments, the main body may also be configured as a tubular shape with a variable diameter. The barrier portion may also have some sections with a constant diameter and some sections with a variable diameter.

[0035] In some other optional embodiments, the blocking portion can also be configured as an ambient plate, located at the bottom end of the main body, and its outer diameter is equal to the diameter of the bottom end of the main body.

[0036] like Figure 3 As shown, in this embodiment, the number of the float modules 1 is two, which are now defined as a first float module 11 and a second float module 12 respectively.

[0037] like Figure 1 As shown, the first float module 11 includes a first float module housing 111 and a first float 112. The first float module housing 111 includes a first main body 1111 and a first barrier 1113. The first barrier 1113 forms a first drain hole 1114 at an end away from the first main body 1111. Figure 2 As shown, the second float module 12 includes a second float module housing 121 and a second float. The second float module housing 121 includes a second main body 1211 and a second blocking portion 1213 . The second blocking portion 1213 forms a second drainage hole 1214 at an end away from the second main body 1211 .

[0038] Specifically, the first float module 11 is connected to the second float module 12. The first float module housing 111 is connected to the second float module housing 121, and the second float 122 is disposed between the first float module housing 111 and the second float module housing 121, and the second float 122 is located below the first float 112.

[0039] That is, the two float modules 1 can be connected and connected, and during the water seepage process, the water flows through the first float module 11 and then the second float module 12 before continuing to flow outward. At the same time, when there is no water flow, the two float modules 1 form two layers of barriers, thereby improving the isolation effect of the fireproof floor drain core.

[0040] In some other optional embodiments, the number of the float modules 1 can also be set to three, four or other numbers.

[0041] Furthermore, if Figure 2 As shown, the second float module housing 121 is sleeved outside the first float module 11 , and the inner diameter of the second float module housing 121 is greater than or equal to the outer diameter of the first float module housing 111 .

[0042] In this embodiment, the length of the second float module housing 121 is greater than the length of the first float module housing 111, and the first float module housing 111 further includes at least one first limiting portion 1112, and the first limiting portion 1112 protrudes outside the first main body 1111. The outer diameter of the first main body 1111 is smaller than the inner diameter of the second main body 1211, and the outer contour defined by the first limiting portion 1112 is larger than the inner contour of the second main body 1211.

[0043] By setting at least one first limiting portion 1112, the first float module 11 and the second float module 12 do not need to be interconnected through interference fit or setting a connecting structure. During use, it is only necessary to place the first float module 11 in the second float module 12 to complete the assembly. The first float module 11 and the second float module 12 can be produced separately. The modular structure facilitates production and manufacturing, and also facilitates users to flexibly choose to use according to different usage scenarios.

[0044] In some other optional embodiments, when the inner diameter of the second float module housing 121 is equal to the inner diameter of the first float module housing 111, the second float module housing 121 and the first float module housing 111 can also be connected in the axial direction, and the two float modules 1 can be connected to each other by providing a flange and other connecting structures and providing a sealing gasket and other components. The two can also be sleeved by interference fit.

[0045] Specifically, in this embodiment, the number of the first limiting portion 1112 is one, which is in the shape of an annular plate, the extension direction of the plane of which is perpendicular to the axis of the first main body 1111, and the inner periphery is connected to the outer periphery of the first main body 1111. Its outer diameter is greater than the inner diameter of the second main body 1211.

[0046] In some other optional embodiments, the first limiting portion 1112 can also be set to other shapes such as plates, ear blocks, columns, etc. The number can also be set to two, three, or other multiples. When the number is set to multiple, they can be evenly spaced or unevenly spaced on the periphery of the first main body 1111. It should be understood that the number and shape of the first limiting portion 1112 can achieve that the first float module 11 can be accommodated and limited in the second float module housing 121.

[0047] like Figure 3 As shown, in some embodiments, the length of the second float module 12 is greater than the length of the first float module 11 .

[0048] Specifically, the length of the second float module housing 121 (the second main body 1211 ) is greater than the length of the first float module housing 111 (the first main body 1111 ).

[0049] In this embodiment, the length of the second main body 1211 is greater than that of the first main body 1111, and the inner diameter of the second main body 1211 is greater than the outer diameter of the first main body 1111, and the first limiting portion 1112 protrudes outside the top of the first main body 1111. This allows the first float module 11 to be directly placed in the second float module housing 121 during assembly. The first float module 11 falls due to its own gravity, and the first limiting portion 1112 at the top is limited to the top of the second main body 1211, so that when the first float module 11 and the second float module 12 are assembled together, the top of the first float module 11 and the top of the second float module 12 are roughly at the same position, and the bottom of the first float module 11 is located above the bottom of the second float module 12.

[0050] In some other optional embodiments, when the two are assembled together, the top of the first float module 11 can also be higher than the top of the second float module 12, that is, part of the upper end of the first float module 11 is located outside the second float module housing 121. This can be achieved by setting the first limiting portion 1112 at a non-top position of the first main body 1111, or by assembling the first main body 1111 and the second main body 1211 through interference fit.

[0051] In some other optional embodiments, the length of the second float module 12 may also be less than or equal to the length of the first float module 11. This may be achieved by providing a connection structure such as a flange between the first float module 11 and the second float module 12, or by providing the first limit portion 1112 at a non-top position of the first main body 1111, or by assembling the first main body 1111 and the second main body 1211 through interference fit.

[0052] It should be understood that the first float module 11 is housed in the second float module housing 121, and the position between the two needs to ensure that when water flow needs to be transmitted, the water flow can smoothly float the first float 112 and the second float 122, so that the first drainage hole 1114 and the second drainage hole 1214 are opened.

[0053] For example Figure 3 As shown, in this embodiment, even if the first float 112 is located above the second float 122, the first float 112 and the second float 122 are spaced apart from each other, so that the second float 122 has a space to float.

[0054] For example Figure 2 As shown, in some embodiments, the second float module housing 121 may also include a second limit portion 1212, and the second limit portion 1212 protrudes from the outside of the second main body 1211. That is, the second float module 12 has the same overall shape as the first float module 11, and only the size difference between the parts exists, so as to facilitate modular production and manufacturing, and to facilitate flexible selection and use by users. When the user chooses to set three or more float modules 1 to assemble and connect to form the entire fireproof floor drain core, he can choose a float module 1 with a size smaller than the first float module 11 and place it in the first float module 11, or choose a float module 1 with a size larger than the second float module 12 and set it outside the second float module 12.

[0055] It should be understood that for the float modules 1 of different sizes, not only the length and diameter of the main body can be different, but also the size of the partition can be different, so that the diameter of the drainage hole formed is different, and then the floats of different sizes can be selected. It is also possible to set only the length and diameter of the main body to different sizes, and the sizes of the other parts are the same, etc., which is not specifically limited here.

[0056] In this embodiment, the housing of each float module is cylindrical, and the float is spherical, so that no matter how the float rotates or moves when floating, the drain hole can be covered when the float falls into the drain hole.

[0057] In some other optional embodiments, the float module housing and / or the float and / or the drain hole may also be configured in other shapes, and the configuration of the shapes only needs to ensure that the drain hole can be covered when the float falls.

[0058] like Figure 4 and Figure 5As shown, in some embodiments, the fireproof floor drain core further includes at least one water seal module 2, which forms a seal by storing water therein, and is connected to at least one float module 1. By combining two different sealing methods, water seal and ball seal, the isolation effect of the fireproof floor drain core is further improved.

[0059] Specifically, the water seal module 2 includes a water seal module housing 21, which is arranged in a tubular shape and communicates with the float module housing, and includes a tubular third main body 211 and a water storage part 212. The third main body 211 is connected to the water storage part 212 and the float module housing respectively. The water storage part 212 is used to store water to form a water seal.

[0060] In this embodiment, the water storage part 212 is a double-layer ring with a closed bottom, and its cross section along the axis is two parallel U-shaped shapes. The outer ring end of the water storage part 212 is connected to the floating ball module shell, and the inner ring is surrounded to form a third drainage hole 214 for drainage. The water seal module 2 also includes a water seal cover 22 for covering the third drainage hole 214.

[0061] Specifically, the water seal module housing 21 is in the shape of a circular tube, the third drainage hole 214 is also circular, and the water seal cover 22 is in the shape of a cylinder with a closed top, which includes a circular top wall and a side wall with a circular cross section, and its inner diameter is larger than the diameter of the third drainage hole 214. It is buckled on the top of the inner ring of the water storage part 212 and covers the third drainage hole 214 to achieve isolation functions such as fire prevention and smoke prevention.

[0062] In some embodiments, the inner diameter of the side wall of the water seal cover 22 is larger than the outer diameter of the inner ring of the water storage part 212, that is, there is a gap between the water seal cover 22 and the inner ring wall of the water storage part 212 for water flow.

[0063] Furthermore, the end of the side wall of the water seal cover 22 away from the top wall is also recessed to form at least one groove 221. When the water seal cover 22 is buckled on the water storage part 212, the end of the side wall of the water seal cover 22 away from the top wall abuts against the U-shaped bottom wall of the water storage part 212, so that the groove 221 is blocked by the U-shaped bottom wall of the water storage part 212 to form a through hole. The through hole is connected to the third drainage hole 214 through the gap between the water seal cover 22 and the inner annular wall of the water storage part 212, thereby realizing the drainage function of the water seal module 2.

[0064] In this embodiment, there are several grooves 221 which are evenly spaced around the circumference of the side wall, thereby ensuring smooth and uniform drainage.

[0065] In some embodiments, the end of the side wall of the water seal cover 22 away from the top wall where the groove 221 is not provided is also formed with a snap-fit ​​structure, and the U-shaped bottom wall of the water storage part 212 is correspondingly formed with a snap-fit ​​structure and the like. The snap-fit ​​structure is limited in the snap-fit ​​groove by screwing and the like, thereby realizing the detachable connection between the water seal cover 22 and the water storage part 212. This is to prevent the water seal cover 22 from floating up due to the buoyancy of water during the drainage process. After drainage, it cannot fall back to the position of covering the third drainage hole 214, resulting in failure of the water seal.

[0066] In some other optional embodiments, the water seal cover 22 may be fixed to the water storage part 212 by welding, integral molding, etc., or by using connecting members such as bolts to achieve a detachable connection with the water storage part 212.

[0067] In some other optional embodiments, the water seal module housing 21 can also be configured as a tubular configuration with other cross-sectional shapes. The third drain hole 214 and the water seal cover 22 can also be configured as other non-circular shapes, and the shape of the water seal cover 22 can also be different from the shape of the third drain hole 214. It should be understood that the configuration of the shape only requires that the water seal cover 22 can block the third drain hole 214 when no water flows through.

[0068] In some other optional embodiments, the water storage part 212 can also be set to a U-shaped tube with a U-shaped axis, one end connected to the third main body 211, and the other end connected to the external environment or the float module, and water storage can also be achieved through the concave U-shaped part.

[0069] In some embodiments, a third limiting portion 213 may be further provided on the outer side surface of the third main body portion 211 for connecting with the float module 1 .

[0070] In this embodiment, the third limiting portion 213 is disposed on the outside of the top end of the third main body portion 211. In some other optional embodiments, it can also be disposed on the outside of other positions of the third main body portion 211.

[0071] When the water seal module 2 is not provided with the third limiting portion 213, it can also be connected to the float module 1 by providing a connecting structure such as a flange or by integral molding, interference fit, etc.

[0072] It should be understood that the size relationship between the water seal module 2 and the float module 1 is flexibly selected according to the positional relationship between the water seal module 2 and the float module 1. If the water seal module 2 is arranged inside the float module 1, the outer diameter of at least the third main body 211 thereof needs to be less than or equal to the inner diameter of the main body of the float module shell. If the water seal module 2 is arranged outside the float module 1, the inner diameter of at least the third main body 211 thereof needs to be greater than or equal to the outer diameter of the main body of the float module shell. The selection criteria for the size are the same as those for the size selection criteria between multiple float modules 1, which have been explained above and will not be repeated again.

[0073] The water seal module 2 can be provided with one, which can be located between two float modules 1, or at one end of all float modules 1. It can also be provided with two, three, etc., and multiple water seal modules 2 can be provided adjacent to each other, or can be provided alternately with the float modules 1, etc., which is not specifically limited here, and can be flexibly selected according to the specific needs of users.

[0074] When the water seal module 2 is arranged between the two float modules 1, when there is no water flow, the two ends of the two float modules 1 are isolated, which can prevent the stored water in the water seal module 2 from volatilizing and losing the water seal effect, thereby ensuring the water seal timeliness of the water seal module 2 and improving the fireproof, smokeproof and odor-proof effects of the fireproof floor drain core.

[0075] It should be understood that, for special cases such as negative pressure chambers, the diameter of the float and / or the weight of the float can be increased to prevent the float from being sucked up by negative pressure when there is no water flow and losing its sealing and isolation effect.

[0076] It should be understood that the overall diameter, material, float, and material of the water seal cover 22 of the fireproof floor drain core can be flexibly selected according to the specific needs of the user and are not specifically limited here.

[0077] It should be understood that the aforementioned positional relationships such as “top”, “bottom”, “upper”, “lower”, “above”, and “below” are based on Figure 3 and Figure 5 Angle shown.

[0078] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A fireproof floor drain core, characterized in that: The invention comprises at least one float module (1), wherein the float module (1) comprises a tubular float module housing and a float arranged in the float module housing, wherein a drainage hole is formed at the bottom end of the float module housing, and the drainage hole is smaller than the diameter of the float.

2. The fireproof floor drain core according to claim 1, characterized in that: The float module shell includes a tubular main body and a tubular partition portion arranged at the bottom end of the main body, the top end of the partition portion is connected to the bottom end of the main body, and the diameter gradually decreases from the top end to the bottom end, and the drainage hole is formed at the bottom end of the partition portion.

3. The fireproof floor drain core according to claim 1, characterized in that: The float module (1) comprises a first float module (11) and a second float module (12); the first float module (11) comprises a first float (112) and a tubular first float module shell (111); the second float module (12) comprises a second float (122) and a tubular second float module shell (121); the first float module shell (111) is connected to the second float module shell (121); the second float (122) is arranged between the first float module shell (111) and the second float module shell (121), and is located below the first float (112).

4. The fireproof floor drain core according to claim 3, characterized in that: The inner diameter of the second float module housing (121) is greater than or equal to the outer diameter of the first float module housing (111), and the second float module housing (121) is sleeved outside the first float module (11).

5. The fireproof floor drain core according to claim 4, characterized in that: The second float module (12) is longer than the first float module (11).

6. The fireproof floor drain core according to claim 3, characterized in that: The first float module housing (111) comprises a first main body (1111) and at least one first limiting portion (1112), wherein the first limiting portion (1112) protrudes outwardly from the outer side of the first main body (1111); The outer contour defined by the at least one first limiting portion (1112) is larger than the inner contour of the second float module housing (121).

7. The fireproof floor drain core according to claim 6, characterized in that: The second float module housing (121) comprises a second main body portion (1211) and a second limiting portion (1212), wherein the second limiting portion (1212) protrudes outwardly from the outer side of the second main body portion (1211).

8. The fireproof floor drain core according to claim 1, characterized in that: It also comprises at least one water seal module (2) which forms a water seal structure by storing water, and the water seal module (2) is connected to the at least one float module (1).

9. The fireproof floor drain core according to claim 8, characterized in that: The water seal module (2) comprises a water seal module housing (21), the water seal module housing (21) comprising a tubular third main body (211) and a water storage part (212) for storing water to form a water seal, the third main body (211) being connected to the water storage part (212) and the float module housing, respectively.

10. The fireproof floor drain core according to claim 9, characterized in that: The water storage part (212) is in the form of a double-layered ring with a closed bottom, and its cross section along the axis is in the form of two parallel U-shaped sections spaced apart, its outer ring end is connected to the float module housing, and its inner ring is surrounded to form a third drainage hole (214); The water seal module (2) further comprises a water seal cover (22), the water seal cover (22) being arranged on the water storage portion (212) and covering the third drainage hole (214), the water seal cover (22) and the water storage portion (212) defining a through hole connected to the third drainage hole (214).

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