A flowmeter housing and flowmeter

Abstract

The utility model discloses a flowmeter shell and flowmeter, flowmeter shell includes extension board and two protective shell, and the side of two protective shell can contact to form the casing structure with the accommodation cavity, and the accommodation cavity is used for placing the measuring mechanism, and extension board is connected with one of two protective shell, and extends to the other of two protective shell, and extension board covers the joint between two protective shell and is located in the accommodation cavity, is used for making the joint between two protective shell and the accommodation cavity apart, and two protective shell have the joint between, and through extension board and one of two protective shell are connected, and extend to the other of two protective shell, can cover the joint between two protective shell, and make the joint and the accommodation cavity apart, set up like this, when welding at the joint of two protective shell, extension board can effectively prevent the welding dross produced when welding from falling into the casing inside, and then avoid the welding fixed process of casing to influence the service life of flowmeter.

Description

Technical Field

[0001] This utility model relates to the field of physical measurement instrument technology, and in particular to a flow meter housing and a flow meter. Background Technology

[0002] The Coriolis mass flow meter is a type of flow meter that works by generating a phase difference related to mass flow rate and a frequency related to density through the torsional vibration of the measuring mechanism, thereby measuring mass flow rate and density.

[0003] Coriolis mass flow meters require an outer casing to form an independent space that houses the measuring mechanism and isolates it from the outside world, ensuring that the vibration of the measuring mechanism is not disturbed. In the existing technology, the casing of the flow meter is often welded to the main body of the flow meter. However, the welding process inevitably produces spatter that enters the casing. The weld slag that falls after the spatter can affect the vibration of the measuring tube, causing inaccurate measurement, or even burn out components such as coils and wires, rendering the flow meter unusable.

[0004] Therefore, how to provide a flow meter housing and flow meter to improve the shortcomings of the above-mentioned prior art is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a flow meter housing and a flow meter that can effectively prevent welding slag generated during welding from falling into the housing, thereby avoiding the welding and fixing process of the housing from affecting the service life of the flow meter.

[0006] To achieve the above objectives, this utility model provides a flow meter housing, including an extension plate and two protective shells. The opposing sides of the two protective shells can contact each other to form a housing structure with a receiving cavity. The receiving cavity is used to house the measuring mechanism. The extension plate is connected to one of the two protective shells and extends toward the other of the two protective shells. The extension plate covers the seam between the two protective shells and is located inside the receiving cavity, so as to separate the seam between the two protective shells from the receiving cavity.

[0007] In one possible implementation, the protective shell includes a first base plate and a plurality of first side plates. The first base plate is a convex polygonal plate. All the first side plates are connected to the edge of the first base plate and bent toward the same side of the first base plate. All the first side plates are connected in sequence to form a first protective plate. The two ends of the first protective plate in its extension direction are spaced apart at the edge of the first base plate on the same side to form an opening. The opening is used to allow the measuring mechanism located in the receiving cavity to communicate with the metering liquid circuit located outside the receiving cavity.

[0008] In one possible implementation, all first side plates in the same protective shell are perpendicular to the first bottom plate, and the connection between the first side plates and the first bottom plate in the same protective shell is set as a rounded corner.

[0009] In one possible implementation, an extension plate is connected to the inside of a first guard plate, and the extension plate includes a mating section extending in a direction away from the first base plate to form a protruding part of the first guard plate, the mating section being used to contact the inside of another first guard plate so that the opposing ends of the two first guard plates are aligned and form a seam.

[0010] In one possible implementation, the protective shell includes a second base plate, a second protective plate, and a third protective plate. The second base plate is a U-shaped plate, including an inner edge portion, an outer edge portion, and a connecting edge portion connecting the inner edge portion and the outer edge portion. The second protective plate is connected to the inner edge portion and bent toward one side of the second base plate. The third protective plate is connected to the outer edge portion and bent toward one side of the second base plate. The second protective plate and the third protective plate are located on the same side of the second base plate, and the connecting edge portion is located between the ends of adjacent second and third protective plates.

[0011] In one possible implementation, the second protective plate is perpendicular to the second bottom plate in the same protective shell, and the connection between the second protective plate and the second bottom plate in the same protective shell is set as a rounded corner;

[0012] The third protective plate in the same protective shell is perpendicular to the second bottom plate, and the connection between the third protective plate and the second bottom plate in the same protective shell is set as a rounded corner.

[0013] In one possible implementation, the extension plate includes an inner extension plate and an outer extension plate;

[0014] The inner extension plate is connected to one of the two second guard plates and is located on the side of the second guard plate facing the third guard plate. The inner extension plate includes an inner mating section extending in a direction away from the second base plate to form an inner mating section protruding from the second guard plate. The inner mating section is used to contact the other second guard plate so that the opposing ends of the two second guard plates are aligned and form a seam.

[0015] The outer extension plate is connected to one of the two third guard plates and is located on the side of the third guard plate facing the second guard plate. The outer extension plate includes an outer mating section extending in a direction away from the second base plate to form an outer mating section protruding from the third guard plate. The outer mating section is used to contact the other third guard plate so that the opposing ends of the two third guard plates are aligned and form a seam.

[0016] In one possible implementation, a fixing plate is also included, which is used to fix relative to the measuring mechanism. Two protective shells are fixedly connected to the fixing plate, and at least part of the fixing plate is embedded in the receiving cavity along its own thickness direction, so that the shell structure formed by the two protective shells is fixed relative to the measuring mechanism.

[0017] In one possible implementation, at least one protective housing is provided with a wire hole, or a vent hole, or a purge hole.

[0018] A flow meter includes a measuring mechanism and a flow meter housing as described above, wherein the measuring mechanism is installed inside the flow meter housing and is externally connected to a metering liquid path via a flow divider.

[0019] Compared with the above-mentioned background technology, the flow meter housing provided by this utility model includes an extension plate and two protective shells. The two protective shells can contact each other on opposite sides to form a housing structure with a receiving cavity. The receiving cavity is used to place the measuring mechanism. The extension plate is connected to one of the two protective shells and extends toward the other of the two protective shells. The extension plate covers the seam between the two protective shells and is located in the receiving cavity, so as to separate the seam between the two protective shells from the receiving cavity.

[0020] Specifically, when the two protective shells come into contact on opposite sides, they form a shell structure with a receiving cavity. The measuring mechanism is placed inside the receiving cavity, and then the two protective shells are fixed. There is a seam between the two protective shells. An extension plate is connected to one of the two protective shells and extends towards the other of the two protective shells. This extension plate can cover the seam between the two protective shells and separate the seam from the receiving cavity. With this configuration, when welding at the seam between the two protective shells, the extension plate can effectively prevent the welding slag generated during welding from falling into the shell, thereby avoiding the welding and fixing process of the shell from affecting the service life of the flow meter. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the flow meter housing provided in the first embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the flow meter housing provided in the first embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of two protective shells joined together, as provided in the first embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the protective shell provided in the first embodiment of the present utility model;

[0026] Figure 5 This is a structural schematic diagram of the protective shell provided in the first embodiment of the present invention from another perspective.

[0027] Figure 6 This is a schematic diagram of the structure of the flow meter housing provided in the second embodiment of the present invention;

[0028] Figure 7 This is an exploded view of the flow meter housing provided in the second embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of two protective shells connected together, provided in the second embodiment of this utility model;

[0030] Figure 9 This is a schematic diagram of the structure of the protective shell provided in the second embodiment of the present invention;

[0031] Figure 10 This is a structural schematic diagram of the protective shell provided in the second embodiment of the present invention from another perspective.

[0032] in:

[0033] 100 - Extension plate, 110 - Inner extension plate, 120 - Outer extension plate;

[0034] 200-Protective shell, 210-First base plate, 220-First side plate, 230-Opening, 240-Second base plate, 241-Connecting edge, 250-Second protective plate, 260-Third protective plate, 270-Seam;

[0035] 300-Fixed Plate;

[0036] 400 - Measuring mechanism;

[0037] 500-Splitter;

[0038] 600 - Support beam. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] In the description of this utility model, it should be understood that the terms "inner" and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model.

[0042] The purpose of this invention is to provide a flow meter housing and a flow meter that can effectively prevent welding slag generated during welding from falling into the housing, thereby avoiding the welding and fixing process of the housing from affecting the service life of the flow meter.

[0043] Please see Figures 1 to 5 To achieve the above objectives, this utility model provides a flowmeter housing, including an extension plate 100 and two protective shells 200. The opposing sides of the two protective shells 200 can contact each other to form a housing structure with a receiving cavity. The protective shells 200 can be formed by cutting sheet metal and bending it, such as by laser cutting or shearing (stamping). The receiving cavity is used to house the measuring mechanism 400. The extension plate 100 is connected to one of the two protective shells 200 and extends towards the other of the two protective shells 200. The extension plate 100 covers the joint 270 between the two protective shells 200 and is located inside the receiving cavity, thereby separating the joint 270 between the two protective shells 200 from the receiving cavity.

[0044] When the two protective shells 200 come into contact with each other on opposite sides, they can form a shell structure with a receiving cavity. The measuring mechanism 400 is placed in the receiving cavity, and then the two protective shells 200 are fixed. There is a seam 270 between the two protective shells 200. An extension plate 100 is connected to one of the two protective shells 200 and extends toward the other of the two protective shells 200. It can cover the seam 270 between the two protective shells 200 and separate the seam 270 from the receiving cavity. With this configuration, when welding at the seam 270 of the two protective shells 200, the extension plate 100 can effectively prevent the welding slag generated during welding from falling into the shell, thereby avoiding the welding and fixing process of the shell from affecting the service life of the flow meter.

[0045] In a first possible embodiment, the protective shell 200 includes a first base plate 210 and a plurality of first side plates 220. The first base plate 210 is a convex polygonal plate. All the first side plates 220 are connected to the edge of the first base plate 210 and bent toward the same side of the first base plate 210. All the first side plates 220 are connected in sequence to form a first protective plate. The two ends of the first protective plate in its extension direction are spaced apart at the edge of the same side of the first base plate 210 to form an opening 230. The opening 230 is used to allow the measuring mechanism 400 located in the receiving cavity to communicate with the metering liquid circuit located outside the receiving cavity. All the first side plates 220 in the same protective shell 200 are perpendicular to the first base plate 210. The connection between the first side plates 220 and the first base plate 210 in the same protective shell 200 is set as a rounded corner.

[0046] The first base plate 210 can be a hexagonal plane plate, with first side plates 220 on each of the five sides of the hexagonal plane. The sheet metal of the first side plates 220 is bent relative to the same side of the first base plate 210, so that five first side plates 220 are connected sequentially to form a first guard plate. The connection between adjacent first side plates 220 can be, but is not limited to, a welded connection. The distance between the end of each of the five first side plates 220 facing away from the first base plate 210 and the first base plate 210 is equal. No special features are provided in the hexagonal plane plate. One side of the first side plate 220 is used to form the opening 230 between the two ends of the first protective plate. The protective shell 200 adopts the sheet metal bending forming process. Since no other machining is required, there are no other processing costs, which can greatly reduce the processing time and processing cost of the protective shell 200. After the protective shell 200 is bent by sheet metal or stamped by mold, the rigidity of the shell can be increased, the deformation during the assembly and welding process can be reduced, and the components of the shell can be assembled more closely, thus improving the assembly efficiency.

[0047] The protective shell 200 can be a one-piece structure, produced by blanking and then sheet metal bending or die stamping, or it can be assembled from several parts. The protective shell 200 can be fully unfolded into a flat shape, precisely cut out with a laser cutting machine, and then bent into the designed shape under a CNC bending machine. All bent parts have rounded corners (rounded corners). The gaps at the edges can be made using, but are not limited to, cold welding, laser welding, or arc welding, while avoiding deformation of the protective shell 200 during the welding process. The protective shell 200 has a simple structure, is easy to process, saves materials, and has low parts processing costs.

[0048] Furthermore, the extension plate 100 is connected to the inner side of a first guard plate, and the extension plate 100 includes a mating section extending in a direction away from the first base plate 210 to form a protrusion from the first guard plate. The mating section is used to contact the inner side of another first guard plate so that the opposing ends of the two first guard plates are aligned and a seam 270 is formed. The extension plate 100 can be made of sheet metal or welded. The shape and thickness of the extension plate 100 are not limited.

[0049] When the first guard plate without the extension plate 100 moves toward the first guard plate with the extension plate 100, the mating section of the extension plate 100 enters the inner side of the first guard plate without the extension plate 100. When the two first guard plates are mated, the mating section can restrict the movement of the first guard plate without the extension plate 100 in a plane perpendicular to the mating direction. At the same time, the mating section can support the first guard plate without the extension plate 100, avoiding the problem that the installation process is more troublesome when the first guard plate is not manually supported. In addition, the first guard plate without the extension plate 100 and the mating section can be set to an interference fit to further restrict the first guard plate without the extension plate 100 from detaching in the opposite direction of the mating direction.

[0050] Please see Figures 6 to 10 In a second possible embodiment, the protective shell 200 includes a second base plate 240, a second protective plate 250, and a third protective plate 260. The second base plate 240 is a U-shaped plate, that is, the second base plate 240 includes two vertical portions and a horizontal portion connecting the two vertical portions. The second base plate 240 includes an inner edge portion, an outer edge portion, and a connecting edge portion 241 connecting the inner edge portion and the outer edge portion. The connecting edge portion 241 is located at one end of the two vertical portions away from the horizontal portion. The second protective plate 250 is connected to the inner edge portion and bent toward one side of the second base plate 240. The third protective plate... 260 is connected to the outer edge and bent toward the side of the second base plate 240, and the second guard plate 250 and the third guard plate 260 are located on the same side of the second base plate 240. The second guard plate 250, the third guard plate 260, and the second base plate 240 connected to the second guard plate 250 and the third guard plate 260 together form a protective shell 200 with a cavity. The shell structure with the above-mentioned receiving cavity is formed by the docking between the two protective shells 200. The connecting edge portion 241 is located between the ends of the adjacent second guard plate 250 and the third guard plate 260 to form an inlet and outlet communicating with the receiving cavity.

[0051] In one possible implementation, the second protective plate 250 in the same protective shell 200 is perpendicular to the second bottom plate 240, and the connection between the second protective plate 250 and the second bottom plate 240 in the same protective shell 200 is set with rounded corners; the third protective plate 260 in the same protective shell 200 is perpendicular to the second bottom plate 240, and the connection between the third protective plate 260 and the second bottom plate 240 in the same protective shell 200 is set with rounded corners. The second protective plate 250 can be formed by sequentially connecting several second side plates connected to the second base plate 240 after bending them relative to the second base plate 240. The third protective plate 260 can be formed by sequentially connecting several third side plates connected to the second base plate 240 after bending them relative to the second base plate 240. The second base plate 240, some of the second side plates, and some of the third side plates can be integrated into a single structure, produced by blanking, sheet metal bending, or die stamping. Then, missing second and third side plates are added to their preset positions and connected to adjacent second and third plates. Alternatively, different sections of the protective shell 200 can be produced separately by sheet metal bending or die stamping and then welded together. Gaps at the corners can be achieved using, but are not limited to, cold welding, laser welding, or arc welding, while avoiding deformation of the protective shell 200 during welding. Rounded corners prevent easy breakage at the connection between the second protective plate 250 and the second base plate 240; similarly, this prevents easy breakage at the connection between the third protective plate 260 and the second base plate 240.

[0052] Further, the extension plate 100 includes an inner extension plate 110 and an outer extension plate 120; the inner extension plate 110 is connected to one of the two second guard plates 250 and is located on the side of the second guard plate 250 facing the third guard plate 260, the inner extension plate 110 includes an inner mating section extending in a direction away from the second base plate 240 to form an inner mating section protruding from the second guard plate 250, the inner mating section being used to contact the other second guard plate 250 so that the opposing ends of the two second guard plates 250 are aligned and form a seam 270; the outer extension plate 120 is connected to the two third guard plates. One of the 260s, and located on the side of the third guard plate 260 facing the second guard plate 250, the outer extension plate 120 includes an outer mating section extending in a direction away from the second base plate 240 to form an outer mating section protruding from the third guard plate 260. The outer mating section is used to contact the other third guard plate 260 so that the opposing ends of the two third guard plates 260 are aligned and form a seam 270. The outer extension plate 120 and the inner extension plate 110 can be made of sheet metal or welded. The shape and thickness of the outer extension plate 120 and the inner extension plate 110 are not limited.

[0053] The inner extension plate 110 and the outer extension plate 120 can be disposed in the same protective shell 200, that is, the second protective plate 250 in the same protective shell 200 is connected to the inner extension plate 110, and the third protective plate 260 is connected to the outer extension plate 120; or the inner extension plate 110 and the outer extension plate 120 can be disposed in different protective shells 200, that is, the second protective plate 250 in one protective shell 200 is connected to the inner extension plate 110, and the third protective plate 260 in another protective shell 200 is connected to the outer extension plate 120; when the second protective plate 250 without the inner extension plate 110 and the second protective plate 250 with the inner extension plate 110 move towards each other, the mating section of the inner extension plate 110 enters the side of the second protective plate 250 without the inner extension plate 110 facing the third protective plate 260; when the third protective plate 250 without the outer extension plate 120 moves towards each other, the mating section of the inner extension plate 110 enters the side of the second protective plate 250 without the inner extension plate 110 facing the third protective plate 260; When plate 260 and the third protective plate 260 with outer extension plate 120 move towards each other, the mating section of outer extension plate 120 enters the side of the third protective plate 260 without outer extension plate 120 facing the second protective plate 250. This can be used to position and support the second protective plate 250 without inner extension plate 110 and the third protective plate 260 without outer extension plate 120, avoiding the problem that the installation process is more troublesome because the protective shell 200 still needs to be manually held after docking to prevent misalignment. In addition, the mating section between the second protective plate 250 without inner extension plate 110 and the inner extension plate 110 can be set as an interference fit, and the mating section between the third protective plate 260 without outer extension plate 120 and the outer extension plate 120 can be set as an interference fit to further restrict the two protective shells 200 from separating from each other in the opposite direction of docking after docking.

[0054] Based on the two embodiments described above, the flow meter housing in this application further includes a fixing plate 300. The fixing plate 300 is used to fix relative to the measuring mechanism 400. Two protective shells 200 are fixedly connected to the fixing plate 300, and at least part of the fixing plate 300 is embedded in the receiving cavity along its own thickness direction, so that the housing structure formed by the two protective shells 200 is fixed relative to the measuring mechanism 400. The measuring mechanism 400 is connected to the flow divider 500, and the flow divider is fixed by the supporting beam 600. The fixing plate 300 is fixed to the flow divider 500, thereby achieving relative fixation between the fixing plate 300 and the measuring mechanism 400, and thus achieving relative fixation between the protective shell 200 fixedly connected to the fixing plate 300 and the measuring mechanism 400.

[0055] It should be noted that when the protective shell 200 uses a convex polygonal plate as the first base plate 210, it can be adapted to the approximately triangular measuring mechanism 400. Only one side of the base plate without the first side plate 220 forms a single opening 230. In this case, the number of fixing plates 300 can be set to one. The fixing plate 300 is welded or cast onto the distributor 500, so that the fixing plate 300 is fixed relative to the measuring mechanism 400. Thus, the protective shell 200 welded to the fixing plate 300 at the opening 230 is fixed relative to the measuring mechanism 400. During welding, the fixing plate 300 is first welded onto the distributor 500, then one protective shell 200 is welded onto the fixing plate 300, and then another protective shell 200 is snapped onto the first protective shell 200. The joint 270 at the joint is sealed and welded. Finally, surface treatment is carried out by sandblasting, shot blasting and other processes. The fixing plate 300 is sunk into the receiving cavity by a certain distance to ensure the welding strength.

[0056] When the protective shell 200 uses a U-shaped plate as the second base plate 240, it can be adapted to the U-shaped measuring mechanism 400. The inner edge of the second base plate 240 is connected to the second protective plate 250, and the outer edge is connected to the third protective plate 260. One end of the second protective plate 250 and one end of the third protective plate 260 form an inlet and outlet, and the other end of the second protective plate 250 and the other end of the third protective plate 260 form another inlet and outlet. At this time, the number of fixing plates 300 can be set to two. A diverter 500 is connected to each end of the measuring mechanism 400. The fixing plates 300 are welded or cast. On the corresponding diverter 500, the fixing plate 300 is fixed relative to the measuring mechanism 400, thereby fixing the protective shell 200 welded to the fixing plate 300 at the inlet and outlet relative to the measuring mechanism 400. During welding, the fixing plate 300 is first welded to the corresponding diverter 500, then one protective shell 200 is welded to the fixing plate 300, and then another protective shell 200 is interlocked with the first protective shell 200 to seal the joint 270 at the joint. Finally, surface treatment is carried out by sandblasting, shot blasting and other processes. The fixing plate 300 is sunk into the receiving cavity by a certain distance to ensure the welding strength.

[0057] In one possible implementation, at least one protective shell 200 is provided with a threading hole, a vent hole, or a purge hole. The location and number of the threading hole, vent hole, and purge hole are not limited. The threading hole serves to thread the wire, the vent hole serves to vent, and the purge hole serves to purge. Raised features, recesses, engravings, or company trademarks may also be provided. Unless otherwise specified, the protective shell 200 should not obstruct the provision of the above structures; therefore, different provision methods should also fall within the scope of this embodiment.

[0058] This application also provides a flow meter, including a measuring mechanism 400 and the aforementioned flow meter housing. The measuring mechanism 400 is installed inside the flow meter housing and is externally connected to a metering liquid path via a flow divider 500. This flow meter also possesses all the beneficial effects of the flow meter housing, which will not be elaborated here.

[0059] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A flowmeter housing characterized by, The device includes an extension plate (100) and two protective shells (200), the two protective shells (200) being able to contact each other on opposite sides to form a shell structure with a receiving cavity for housing a measuring mechanism (400). The extension plate (100) is connected to one of the two protective shells (200) and extends toward the other of the two protective shells (200). The extension plate (100) covers the seam (270) between the two protective shells (200) and is located within the receiving cavity, thereby separating the seam (270) between the two protective shells (200) from the receiving cavity.

2. The flow meter housing according to claim 1, characterized in that, The protective shell (200) includes a first base plate (210) and a plurality of first side plates (220). The first base plate (210) is a convex polygonal plate. All the first side plates (220) are connected to the edge of the first base plate (210) and bent toward the same side of the first base plate (210). All the first side plates (220) are connected in sequence to form a first protective plate. The two ends of the first protective plate in its extension direction are spaced apart at the edge of the first base plate (210) on the same side to form an opening (230). The opening (230) is used to allow the measuring mechanism (400) located in the receiving cavity to communicate with the metering liquid circuit located outside the receiving cavity.

3. The flow meter housing according to claim 2, characterized in that, All the first side plates (220) in the same protective shell (200) are perpendicular to the first bottom plate (210), and the connection between the first side plate (220) and the first bottom plate (210) in the same protective shell (200) is set with rounded corners.

4. The flow meter housing according to claim 2, characterized in that, The extension plate (100) is connected to the inside of one of the first guard plates, and the extension plate (100) includes a mating section extending in a direction away from the first base plate (210) to form a protruding part of the first guard plate, the mating section being used to contact the inside of the other first guard plate so that the opposing ends of the two first guard plates are aligned and form a seam (270).

5. The flow meter housing according to claim 1, characterized in that, The protective shell (200) includes a second base plate (240), a second protective plate (250), and a third protective plate (260). The second base plate (240) is a U-shaped plate. The second base plate (240) includes an inner edge portion, an outer edge portion, and a connecting edge portion (241) connecting the inner edge portion and the outer edge portion. The second protective plate (250) is connected to the inner edge portion and bent toward one side of the second base plate (240). The third protective plate (260) is connected to the outer edge portion and bent toward one side of the second base plate (240). The second protective plate (250) and the third protective plate (260) are located on the same side of the second base plate (240). The connecting edge portion (241) is located between the ends of adjacent second protective plates (250) and third protective plates (260).

6. The flow meter housing according to claim 5, characterized in that, In the same protective shell (200), the second protective plate (250) is perpendicular to the second bottom plate (240), and the connection between the second protective plate (250) and the second bottom plate (240) in the same protective shell (200) is set with rounded corners; The third protective plate (260) in the same protective shell (200) is perpendicular to the second bottom plate (240), and the connection between the third protective plate (260) and the second bottom plate (240) in the same protective shell (200) is set as a rounded corner.

7. The flow meter housing according to claim 5, characterized in that, The extension plate (100) includes an inner extension plate (110) and an outer extension plate (120). The inner extension plate (110) is connected to one of the two second guard plates (250) and is located on the side of the second guard plate (250) facing the third guard plate (260). The inner extension plate (110) includes an inner mating section extending in a direction away from the second base plate (240) to form an inner mating section protruding from the second guard plate (250). The inner mating section is used to contact the other second guard plate (250) so that the opposing ends of the two second guard plates (250) are aligned and form a seam (270). The outer extension plate (120) is connected to one of the two third guard plates (260) and is located on the side of the third guard plate (260) facing the second guard plate (250). The outer extension plate (120) includes an outer mating section extending in a direction away from the second base plate (240) to form an outer mating section protruding from the third guard plate (260). The outer mating section is used to contact the other third guard plate (260) so that the opposing ends of the two third guard plates (260) are aligned and form a seam (270).

8. The flow meter housing according to any one of claims 1-7, characterized in that, It also includes a fixing plate (300) for fixing relative to the measuring mechanism (400), two protective shells (200) are fixedly connected to the fixing plate (300), and at least part of the fixing plate (300) is embedded in the receiving cavity along its own thickness direction, so that the shell structure formed by the two protective shells (200) is fixed relative to the measuring mechanism (400).

9. The flow meter housing according to claim 8, characterized in that, At least one of the protective shells (200) is provided with a wire hole, or a vent hole, or a purge hole.

10. A flow meter, characterized in that, It includes a measuring mechanism (400) and a flow meter housing as described in any one of claims 1-9, wherein the measuring mechanism (400) is installed inside the flow meter housing and the measuring mechanism (400) is externally connected to a metering liquid path via a flow divider (500).

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