Sound velocity nozzle fluid detection device

Abstract

The utility model relates to the technical field of gas meter detection, and discloses a sonic nozzle fluid detection device which comprises a stagnation container. The nozzle assembly comprises a nozzle mounting plate and a sonic nozzle body; the backpressure container is provided with a second cavity, and the stagnation container is detachably connected with the backpressure container through a nozzle mounting plate; the base is provided with a bearing surface, a guide rail is arranged on the bearing surface, the guide rail extends in the arrangement direction of the stagnation container and the backpressure container, and the stagnation container is in sliding connection with the guide rail through a first connecting mechanism. When the connection relation among the stagnation container, the nozzle mounting plate and the backpressure container is removed, the stagnation container can be easily pushed towards one side far away from the backpressure container along the extension direction of the guide rail, so that the disassembly of the sonic nozzle body is conveniently realized. Therefore, when large-flow detection is carried out, inconvenience caused by the size and the quality of the device can be overcome, and the disassembly and assembly efficiency of the sonic nozzle body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas meter detection, and particularly relates to a sonic nozzle fluid detection device. Background Art

[0002] A sonic nozzle is a common standard device in the metering detection of gas meters and is usually applied in fluid detection devices. Since it will be continuously contaminated by flowing gas during use, the sonic nozzle must be frequently sent for inspection and maintenance. Therefore, the sonic nozzle needs to be detachably installed in the fluid detection device.

[0003] However, if the sonic nozzle fluid detection device is applied to large-flow detection, its size and mass are relatively large, which will cause inconvenience in disassembling and installing the sonic nozzle, thus reducing the disassembly and installation efficiency of the sonic nozzle.

[0004] Therefore, how to design a sonic nozzle fluid detection device that is easy to assemble, so as to improve the disassembly and installation efficiency of the sonic nozzle, has become an urgent technical problem in this field. Summary of the Utility Model

[0005] The purpose of the utility model is to at least solve the problem of how to improve the disassembly and installation efficiency of the sonic nozzle. This purpose is achieved through the following technical solutions:

[0006] In a first aspect, the utility model provides a sonic nozzle fluid detection device, which includes: a stagnation container having a first cavity, and one end of the stagnation container has an air inlet; a nozzle assembly including a nozzle mounting plate and at least one sonic nozzle body mounted on the nozzle mounting plate; a back pressure container having a second cavity, one end of the stagnation container away from the air inlet is detachably connected to one end of the back pressure container close to the air inlet through the nozzle mounting plate, the sonic nozzle body is located in the second cavity, and the first cavity is communicated with the second cavity through the sonic nozzle body; and a base having a bearing surface, on which a guide rail is provided, the guide rail extends along the arrangement direction of the stagnation container and the back pressure container, and the stagnation container is slidably connected to the guide rail through a first connection mechanism.

[0007] When this sonic nozzle fluid detection device needs to send the sonic nozzle body for inspection and maintenance, first, the connection relationships among the stagnation container, the nozzle mounting plate, and the backpressure container are released. Since the stagnation container is slidably connected to the guide rail through the first connection mechanism, at this time, it is easy to push the stagnation container along the extension direction of the guide rail for a certain distance away from the backpressure container to leave enough space for disassembling the nozzle assembly between the stagnation container and the backpressure container. Then, the nozzle assembly can be disassembled, and thus, the disassembly of the sonic nozzle body can be conveniently achieved. When installing, just reverse the above process, which will not be elaborated here. Therefore, when performing large-flow detection, this sonic nozzle fluid detection device can overcome the inconvenience brought by the size and mass of the device itself and improve the disassembly and assembly efficiency of the sonic nozzle body.

[0008] In some embodiments of the present utility model, the sonic nozzle fluid detection device further includes mounting screws, which sequentially pass through the stagnation container, the nozzle mounting plate, and the backpressure container.

[0009] In some embodiments of the present utility model, the first connection mechanism includes a first connecting member. One end of the first connecting member is connected to the stagnation container, and the other end of the first connecting member is connected with a slider, and the slider has a chute that mates with the guide rail.

[0010] In some embodiments of the present utility model, there are multiple sliders, at least two guide rails are arranged on the bearing surface, and each guide rail is at least arranged in cooperation with one slider.

[0011] In some embodiments of the present utility model, the first cavity and the second cavity cooperate to form a working cavity, and the nozzle mounting plate has a limiting portion, and the limiting portion is configured to be able to limit the relative movement between the nozzle mounting plate and the working cavity in the radial direction of the working cavity.

[0012] In some embodiments of the present utility model, the backpressure container is fixedly connected to the bearing surface through a second connection mechanism. The second connection mechanism includes a second connecting member. One end of the second connecting member is connected to the backpressure container, and the other end of the second connecting member is detachably fixedly connected to the bearing surface.

[0013] In some embodiments of the present utility model, a first mounting member for installing a meter under test is provided at the air inlet, and an air outlet is provided on the side wall of the backpressure container, and a second mounting member for installing a fan is provided at the air outlet.

[0014] In some embodiments of the present utility model, the sonic nozzle fluid detection device further includes a plugging assembly, which includes: a cylinder mounting plate installed at one end of the backpressure container away from the stagnation container; a baffle valve passing through the cylinder mounting plate; and a cylinder body located in the second cavity. The cylinder body has a plugging head, and the baffle valve is used to drive the cylinder body to move so that the plugging head plugs or moves away from the sonic nozzle body.

[0015] In some embodiments of the present utility model, there are multiple sonic nozzle bodies, baffle valves, and cylinder bodies. The multiple sonic nozzle bodies, multiple baffle valves, and multiple cylinder bodies are arranged in one-to-one correspondence.

[0016] In some embodiments of the present utility model, a first sealing ring is provided between the back pressure container and the cylinder mounting plate, a second sealing ring is provided between the nozzle mounting plate and the back pressure container, and a third sealing ring is provided between the stagnation container and the nozzle mounting plate.

[0017] The above description is only an overview of the technical solution of this application. In order to be able to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of this application more obvious and understandable, the following specifically describes the specific implementation manners of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0019] Figure 1 is a schematic structural diagram of the sonic nozzle fluid detection device provided by the embodiment of the present utility model when assembled;

[0020] Figure 2 is a schematic diagram of the sonic nozzle fluid detection device provided by the embodiment of the present utility model from another angle;

[0021] Figure 3 is a cross-sectional view of the sonic nozzle fluid detection device provided by the embodiment of the present utility model;

[0022] Figure 4 is a schematic structural diagram of the sonic nozzle fluid detection device provided by the embodiment of the present utility model after the nozzle assembly is disassembled;

[0023] Figure 5 is a schematic structural diagram of the nozzle assembly in the sonic nozzle fluid detection device provided by the embodiment of the present utility model.

[0024] The reference numerals are as follows:

[0025] 100, sonic nozzle fluid detection device;

[0026] 1, stagnation container; 11, first cavity; 111, air inlet; 12, first mounting member;

[0027] 2. Nozzle assembly; 21. Nozzle mounting plate; 211. First boss; 212. Second boss; 22. Sonic nozzle body;

[0028] 3. Back pressure vessel; 31. Second cavity; 311. Air outlet; 32. Second mounting part;

[0029] 4. Base; 41. Bearing surface; 42. Guide rail;

[0030] 5. First connection mechanism; 51. First connecting part; 52. Slide block;

[0031] 6. Second connection mechanism; 61. Second connecting part; 62. Connecting block;

[0032] 71. Mounting screw; 72. Auxiliary screw;

[0033] 81. Cylinder mounting plate; 82. Damper valve; 83. Cylinder body; 831. Plugging head;

[0034] 9. Fastening screw. Detailed implementation manners

[0035] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully communicated to those skilled in the art.

[0036] It should be understood that the terms used herein are only for the purpose of describing specific exemplary embodiments and are not intended to be limiting. Unless otherwise clearly specified in the context, the singular forms "a", "an" and "the" as used herein may also represent the plural form. The terms "comprising", "including", "containing" and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is explicitly stated. It should also be understood that additional or alternative steps can be used.

[0037] Although terms such as first, second, and third may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms do not imply an order or sequence when used herein. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0038] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "upper", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented as "above" or "upper" another element or feature. Thus, the exemplary term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are interpreted accordingly.

[0039] Figure 1 FIG. is a schematic structural diagram of the sonic nozzle fluid detection device provided by the embodiment of the present utility model when assembled; Figure 2 FIG. is a schematic diagram of the sonic nozzle fluid detection device provided by the embodiment of the present utility model from another angle; Figure 3 FIG. is a cross-sectional view of the sonic nozzle fluid detection device provided by the embodiment of the present utility model; Figure 4 FIG. is a schematic structural diagram of the sonic nozzle fluid detection device provided by the embodiment of the present utility model after the nozzle assembly is disassembled.

[0040] As Figures 1 to 4As shown, an embodiment of the present invention provides a sonic nozzle fluid detection device 100, which includes: a stagnation container 1, having a first cavity 11, and an air inlet 111 at one end of the stagnation container 1; a nozzle assembly 2, including a nozzle mounting plate 21 and at least one sonic nozzle body 22 mounted on the nozzle mounting plate 21; a back pressure container 3, having a second cavity 31, and an end of the stagnation container 1 away from the air inlet 111 is detachably connected to an end of the back pressure container 3 close to the air inlet 111 through the nozzle mounting plate 21, the sonic nozzle body 22 is located in the second cavity 31, and the first cavity 11 is connected to the second cavity 31 through the sonic nozzle body 22; and a base 4, having a bearing surface 41, on which a guide rail 42 is provided, which extends along the arrangement direction of the stagnation container 1 and the back pressure container 3, and the stagnation container 1 is slidably connected to the guide rail 42 through a first connecting mechanism 5.

[0041] In this embodiment, when the sonic nozzle body 22 needs to be inspected and maintained, the connection between the stagnation container 1, the nozzle mounting plate 21, and the back-pressure container 3 is first released. Since the stagnation container 1 is slidably connected to the guide rail 42 via the first connecting mechanism 5, the stagnation container 1 can be easily pushed a distance along the extension direction of the guide rail 42 toward the side away from the back-pressure container 3, thereby leaving sufficient space between the stagnation container 1 and the back-pressure container 3 for removing the nozzle assembly 2. Figure 4 As shown, the nozzle assembly 2 is then disassembled, and the sonic nozzle body 22 can be easily disassembled. When installing, the above process can be reversed, which will not be repeated here.

[0042] Therefore, the sonic nozzle fluid detection device 100 provided in this embodiment can overcome the inconvenience caused by the size and weight of the device itself when performing large flow detection, and improve the efficiency of disassembly and assembly of the sonic nozzle body 22.

[0043] refer to Figures 1 to 4 According to an optional embodiment of the present invention, the sonic nozzle fluid detection device 100 further includes a mounting screw 71, which is sequentially passed through the stagnation container 1, the nozzle mounting plate 21 and the back pressure container 3.

[0044] In this embodiment, the arrangement of the mounting screws 71 can ensure the stability of the connection between the stagnation container 1, the nozzle mounting plate 21 and the back pressure container 3 while facilitating assembly and disassembly.

[0045] Specifically, according to an optional embodiment of the present invention, there are multiple mounting screws 71, and the multiple mounting screws 71 can be evenly spaced around the circumference of the stagnation container 1, such as Figure 1 As shown, this further ensures that the sonic nozzle fluid detection device 100 is subjected to uniform force and has stable connection.

[0046] In addition, referring to Figure 2 and Figure 4 , the sonic nozzle fluid detection device 100 may further include an auxiliary screw 72. The auxiliary screw 72 is passed through the connecting back pressure vessel 3 and the nozzle mounting plate 21 to fix the nozzle mounting plate 21 to the connecting back pressure vessel 3. That is, the nozzle mounting plate 21 is mounted on the back pressure vessel 3 by two fixing methods of mounting screws 71 and auxiliary screws 72, thereby further improving the stability of the nozzle mounting plate 21.

[0047] Similarly, the number of auxiliary screws 72 can also be set to two or more. The specific number should be based on the actual working conditions and meet the requirement of improving the stability of the nozzle mounting plate 21 during assembly. Referring to Figure 1 , according to an optional embodiment of the present invention, the first connecting mechanism 5 includes a first connecting member 51. One end of the first connecting member 51 is connected to the stagnation vessel 1, and the other end of the first connecting member 51 is connected with a slider 52. The slider 52 has a chute that cooperates with the guide rail 42.

[0048] In this embodiment, when the connection relationship between the stagnation vessel 1, the nozzle mounting plate 21 and the back pressure vessel 3 is released, the stagnation vessel 1 can be pushed along the extension direction of the guide rail 42 towards the side away from the back pressure vessel 3. That is, the slider 52 slides along the guide rail 42 towards the side away from the back pressure vessel 3 through the chute until the moving distance is sufficient to leave a space for disassembling the nozzle assembly 2, and then the nozzle assembly 2 can be disassembled, so that the disassembly of the sonic nozzle body 22 can be conveniently realized. During installation, the above process can be reversed, which will not be elaborated here. It is easy to understand that the cooperation between the slider 52 and the guide rail 42 can also achieve the effects of saving time and effort and being convenient for operation in the sonic nozzle fluid detection device 100.

[0049] Therefore, in this embodiment, by the setting method of the cooperation between the chute on the slider 52 and the guide rail 42, when performing large-flow detection, it can overcome the inconvenience brought by the size and mass of the sonic nozzle fluid detection device 100 itself and improve the disassembly and assembly efficiency of the sonic nozzle body 22; and the structure of the cooperation between the slider 52 and the chute is simple, easy to manufacture and has a low cost.

[0050] Continuing to refer to Figure 1 , according to an optional embodiment of the present invention, there are multiple sliders 52, and at least two guide rails 42 are provided on the bearing surface 41. Each guide rail 42 is at least cooperatively provided with one slider 52.

[0051] Among them, for the convenience of description, the extending direction of the guide rail 42 is defined as the first direction; taking the example that there are two guide rails 42 provided on the bearing surface 41, the arranging direction of the two guide rails 42 is defined as the second direction. It is easy to understand that if there are three, four or more guide rails 42 provided on the bearing surface 41, the multiple guide rails 42 are also arranged at intervals along the second direction.

[0052] In addition, it is easy to understand that in order to improve the support strength, the first connecting member 51 can be set as a plate-like structure.

[0053] In this embodiment, in order to improve the stability of the stagnation container 1 when sliding on the guide rail 42, at least two guide rails 42 arranged along the second direction can be provided.

[0054] As Figure 1 shown, taking the example that the sonic nozzle fluid detection device 100 is provided with two guide rails 42 and two first connection mechanisms 5 in total, one slider 52 can be provided on each side of each first connecting member 51 along the second direction, so two sliders 52 are arranged in cooperation on each guide rail 42.

[0055] This setting method enables the stagnation container 1 to be supported more stably, thereby improving the stability of the stagnation container 1 when sliding along the first direction.

[0056] According to an optional embodiment of the present invention, the first cavity 11 and the second cavity 31 cooperate to form a working cavity, and the nozzle mounting plate 21 has a limiting portion, and the limiting portion is configured to be able to limit the relative movement between the nozzle mounting plate 21 and the working cavity in the radial direction of the working cavity.

[0057] In this embodiment, the setting of the limiting portion can play a role in positioning the nozzle mounting plate 21 in the radial direction of the working cavity, thereby improving the assembly efficiency of the nozzle mounting plate 21. At the same time, it also further ensures the stability of the finally assembled sonic nozzle fluid detection device 100.

[0058] Figure 5 This is a schematic structural diagram of the nozzle assembly in the sonic nozzle fluid detection device provided by the embodiment of the present invention. Referring together to Figures 3 to 5 , according to an optional embodiment of the present invention, the two sides of the nozzle mounting plate 21 can be respectively provided with a first boss 211 and a second boss 212. The outer wall of the first boss 211 is used to cooperate with the inner wall of the first cavity 11, and the outer wall of the second boss 212 is used to cooperate with the inner wall of the second cavity 31. The first boss 211 and the second boss 212 together constitute the limiting portion.

[0059] When assembling this nozzle mounting plate 21, the first boss 211 is extended from the end of the first cavity 11 facing away from the air inlet 111 into the first cavity 11 and is clamped to the inner wall of the first cavity 11, and the second boss 212 is extended from the end of the second cavity 31 close to the first cavity 11 into the second cavity 31 and is clamped to the inner wall of the second cavity 31; under the blocking action of the first boss 211 and the second boss 212, the nozzle mounting plate 21 cannot move relative to the working cavity along the radial direction of the working cavity, thereby playing a role in limiting the nozzle mounting plate 21 in the radial direction of the working cavity.

[0060] Specifically, the shape and size of the outer wall of the first boss 211 can be set according to the shape and size of the inner wall of the first cavity 11. In this way, when assembled, the outer wall of the first boss 211 will completely fit the inner wall of the first cavity 11. Similarly, the shape and size of the outer wall of the second boss 212 can also be set according to the shape and size of the inner wall of the second cavity 31. Therefore, this setting method can ultimately make the nozzle mounting plate 21 more stably connected to the working cavity, thereby strengthening the limiting effect of the nozzle mounting plate 21 in the radial direction of the working cavity. Figure 1 According to an optional embodiment of the present invention, the back pressure container 3 is fixedly connected to the bearing surface 41 through a second connecting mechanism 6, and the second connecting mechanism 6 includes a second connecting member 61, one end of the second connecting member 61 is connected to the back pressure container 3, and the other end of the second connecting member 61 is detachably fixedly connected to the bearing surface 41.

[0061] In this embodiment, similarly, it is easy to understand that in order to improve the supporting strength, the second connecting member 61 can be configured as a plate-shaped structure.

[0062] In addition, the second connecting mechanism 6 may further include a connecting block 62, which may be disposed at the lower end of the second connecting member 61. The connecting block 62 may be detachably connected to the bearing surface 41 via screws. Specifically, each second connecting member 61 may be provided with a connecting block 62 on both sides along the second direction to further enhance the stability of the backpressure container 3.

[0063] refer to Figures 1 to 4 According to an optional embodiment of the present invention, a first mounting member 12 for mounting a meter under test is provided at the air inlet 111. An air outlet 311 is provided on the sidewall of the backpressure container 3. A second mounting member 32 for mounting a fan is provided at the air outlet 311. In this embodiment, both the first mounting member 12 and the second mounting member 32 can be flanges. The flange connection offers a simple structure, convenient operation, and guaranteed connection stability.

[0064] like Figures 1 to 4As shown, according to an optional embodiment of the present utility model, the sonic nozzle fluid detection device 100 further includes a plugging component, and the plugging component includes: a cylinder mounting plate 81, mounted at one end of the back pressure container 3 away from the stagnation container 1; a baffle valve 82, passing through the cylinder mounting plate 81; and a cylinder body 83, located in the second cavity 31. The cylinder body 83 has a plugging head 831, and the baffle valve 82 is used to drive the cylinder body 83 to move so that the plugging head 831 plugs or moves away from the sonic nozzle body 22.

[0065] Among them, the cylinder mounting plate 81 can be detachably connected to the stagnation container 1 through fastening screws 9.

[0066] In this embodiment, when the sonic nozzle body 22 is not working, in order to prevent air leakage, it is necessary to plug the sonic nozzle body 22. Therefore, a plugging component is provided. During operation, the baffle valve 82 is controlled outside the second cavity 31 to drive the cylinder body 83 to move in the first direction so that the plugging head 831 plugs the sonic nozzle body 22. The operation is simple and convenient, and the accuracy is high. It is easy to understand that when it is necessary to release the plugging of the sonic nozzle body 22, only need to make the baffle valve 82 drive the cylinder body 83 to move in the opposite direction of the first direction, so that the plugging head 831 moves away from the sonic nozzle body 22.

[0067] Reference Figure 3 , specifically, according to an optional embodiment of the present utility model, there are multiple sonic nozzle bodies 22, multiple baffle valves 82, and multiple cylinder bodies 83, and the multiple sonic nozzle bodies 22, multiple baffle valves 82, and multiple cylinder bodies 83 are arranged in one-to-one correspondence.

[0068] In this embodiment, since the flow rate detected each time is different, multiple sonic nozzle bodies 22 can be selected with specifications corresponding to different flow rates. After confirming the sonic nozzle body 22 corresponding to the fluid specification, keep the sonic nozzle body 22 in an open state, and control the plugging component to plug other sonic nozzle bodies 22, thereby ensuring the detection accuracy of the sonic nozzle fluid detection device 100.

[0069] Since each sonic nozzle body 22 has a uniquely corresponding cylinder body 83 and baffle valve 82, this setting method can select the sonic nozzle body 22 with the corresponding specification to work according to the different flow rates detected under actual working conditions, improving the overall working efficiency of the sonic nozzle fluid detection device 100.

[0070] According to an optional embodiment of the present utility model, a first sealing ring is provided between the back pressure container 3 and the cylinder mounting plate 81, a second sealing ring is provided between the nozzle mounting plate 21 and the back pressure container 3, and a third sealing ring is provided between the stagnation container 1 and the nozzle mounting plate 21.

[0071] In this embodiment, the provision of the first sealing ring can prevent gas from leaking from the side of the back-pressure container 3 on which the cylinder mounting plate 81 is mounted, thereby ensuring the sealing of the second cavity 31; similarly, since the stagnation container 1, the nozzle mounting plate 21 and the back-pressure container 3 are all detachably connected, in order to ensure the sealing of the first cavity 11 and the second cavity 31, a second sealing ring is provided between the nozzle mounting plate 21 and the back-pressure container 3, and a third sealing ring is provided between the stagnation container 1 and the nozzle mounting plate 21. Combined with the provision of the above-mentioned first sealing ring, the overall sealing of the sonic nozzle fluid detection device 100 is ensured, thereby ensuring the detection accuracy of the sonic nozzle fluid detection device 100.

[0072] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A sonic nozzle fluid detection device, characterized in that: include: A stagnation container having a first cavity, wherein one end of the stagnation container has an air inlet; a nozzle assembly comprising a nozzle mounting plate and at least one sonic nozzle body mounted on the nozzle mounting plate; a backpressure container having a second cavity, wherein an end of the stagnation container away from the air inlet is detachably connected to an end of the backpressure container near the air inlet via the nozzle mounting plate, the sonic nozzle body is located in the second cavity, and the first cavity is connected to the second cavity via the sonic nozzle body; and The base has a bearing surface, a guide rail is provided on the bearing surface, the guide rail extends along the arrangement direction of the stagnation container and the back pressure container, and the stagnation container is slidably connected to the guide rail through a first connecting mechanism.

2. The sonic nozzle fluid detection device according to claim 1, characterized in that: The sonic nozzle fluid detection device further includes a mounting screw, which is sequentially passed through the stagnation container, the nozzle mounting plate, and the back pressure container.

3. The sonic nozzle fluid detection device according to claim 1, characterized in that: The first connecting mechanism includes a first connecting member, one end of which is connected to the stagnation container, and the other end of the first connecting member is connected to a slider, and the slider has a sliding groove that cooperates with the guide rail.

4. The sonic nozzle fluid detection device according to claim 3, characterized in that: There are multiple sliders, at least two guide rails are arranged on the bearing surface, and each guide rail is arranged in cooperation with at least one slider.

5. The sonic nozzle fluid detection device according to claim 1, characterized in that: The first cavity cooperates with the second cavity to form a working cavity. The nozzle mounting plate has a limiting portion configured to limit relative movement between the nozzle mounting plate and the working cavity in a radial direction of the working cavity.

6. The sonic nozzle fluid detection device according to claim 1, characterized in that: The back pressure container is fixedly connected to the bearing surface via a second connecting mechanism, wherein the second connecting mechanism includes a second connecting member, one end of the second connecting member is connected to the back pressure container, and the other end of the second connecting member is detachably fixedly connected to the bearing surface.

7. The sonic nozzle fluid detection device according to claim 1, characterized in that: A first mounting piece for mounting a meter under inspection is provided at the air inlet, an air outlet is provided on the side wall of the back pressure container, and a second mounting piece for mounting a fan is provided at the air outlet.

8. The sonic nozzle fluid detection device according to any one of claims 1 to 7, characterized in that: The sonic nozzle fluid detection device further includes a blocking component, which includes: a cylinder mounting plate, mounted on an end of the back pressure container away from the stagnation container; a baffle valve, which is installed on the cylinder mounting plate; and The cylinder body is located in the second cavity, and the cylinder body has a plugging head. The baffle valve is used to drive the cylinder body to move so that the plugging head blocks or moves away from the sonic nozzle body.

9. The sonic nozzle fluid detection device according to claim 8, characterized in that: There are multiple sonic nozzle bodies, multiple baffle valves and multiple cylinder bodies, and the multiple sonic nozzle bodies, multiple baffle valves and multiple cylinder bodies are arranged in a one-to-one correspondence.

10. The sonic nozzle fluid detection device according to claim 8, characterized in that: A first sealing ring is provided between the back pressure container and the cylinder mounting plate, a second sealing ring is provided between the nozzle mounting plate and the back pressure container, and a third sealing ring is provided between the stagnation container and the nozzle mounting plate.

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