Special-shaped space sealing device for breather valve fluid test

Abstract

The utility model discloses a special-shaped space sealing device for breather valve fluid testing, and relates to the technical field of valve body detection, and the device comprises an upper pressing plate, a lower pressing plate, a foam composite body, a conical double-hole air nozzle mechanism, a pressing mechanism, a ratchet wheel self-tightening bundling structure and a supporting plate; the upper pressing plate is arranged at the upper end of the foam composite body, the lower pressing plate is arranged at the bottom of the foam composite body, the conical double-hole air nozzle mechanism sequentially penetrates through the upper pressing plate, the foam composite body, the lower pressing plate and the pressing mechanism, the double-hole air nozzle end of the conical double-hole air nozzle mechanism is arranged at the bottom of the pressing mechanism, and the pressing mechanism abuts against the bottom of the lower pressing plate. The supporting plate is arranged on the top of the breather valve, and the ratchet wheel self-tightening bundling structure is connected with the bottom of the lower pressing plate and the top of the supporting plate. The sealing device can be used for temporarily and efficiently sealing special-shaped breathing openings of various breathing valves, good conditions are provided for breathing valve testing, and meanwhile the sealing cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of valve body detection technology, and in particular to a special-shaped space sealing device for testing fluid in a breathing valve. Background Art

[0002] At present, in the petrochemical industry, hazardous chemicals industry and fine chemical industry, storage tank pipeline control technology is widely used. Various flammable and explosive gases or liquid-gas mixtures flow in the storage tanks. Therefore, in order to ensure safe production, breathing valves of various specifications are widely used in the storage tank system.

[0003] Since the breathing valve needs to be regularly and compulsorily tested for performance, including leakage and opening pressure, the exhalation port and the inhalation port need to be temporarily sealed during the test. However, due to the large number of breathing valves that need to be tested and the various specifications, and the shapes of the breathing interfaces corresponding to the exhalation port and the inhalation port vary greatly, there are a large number of breathing ports with special-shaped structures and strange structures. In addition, under the condition of poor sealing conditions and high sealing difficulty, the sealing cost of the breathing port of the breathing valve is high and the efficiency is low. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a special-shaped space sealing device for breathing valve fluid testing, which can be used for temporary and efficient sealing of various special-shaped breathing ports of breathing valves, providing good conditions for breathing valve testing and also reducing sealing costs.

[0005] The present application provides a special-shaped space sealing device for breathing valve fluid testing, comprising: an upper pressing plate, a lower pressing plate, a foam composite, a conical double-hole air nozzle mechanism, a clamping mechanism, a ratchet self-tightening binding structure and a support plate;

[0006] The upper pressing plate is arranged on the top of the foam composite body, the lower pressing plate is arranged on the bottom of the foam composite body, the conical double-hole air nozzle mechanism is sequentially penetrated through the upper pressing plate, the foam composite body, the lower pressing plate and the clamping mechanism, the double-hole air nozzle end of the conical double-hole air nozzle mechanism is arranged on the bottom of the clamping mechanism, the clamping mechanism abuts against the bottom of the lower pressing plate, the support plate is arranged on the top of the breathing valve, the ratchet self-tightening binding structure is respectively connected to the bottom of the lower pressing plate and the top of the support plate, and the shape of the foam composite body corresponds to the shape of the breathing port of the breathing valve;

[0007] The ratchet self-tightening binding structure is used to press the lower pressure plate against the breathing port of the breathing valve so that the foam composite can seal the breathing port of the breathing valve. The size of the foam composite is much larger than the size of the breathing port, and the size of the upper pressure plate is smaller than the size of the breathing port. The clamping mechanism is used to adjust the distance between the lower pressure plate and the foam composite to adjust the degree of compression of the foam composite against the breathing port.

[0008] According to some embodiments of the present application, the double-hole air nozzle end of the conical double-hole air nozzle mechanism includes a first air nozzle and a second air nozzle, the first air nozzle is used to connect to the pressure sensor, and the second air nozzle is used to connect to the air source pipeline.

[0009] According to some embodiments of the present application, the breathing valve has two breathing ports symmetrically arranged, and the number of the upper pressure plate, the lower pressure plate, the foam composite, the conical double-hole air nozzle mechanism, the clamping mechanism and the ratchet self-tightening binding structure corresponds to the number of the breathing ports.

[0010] According to some embodiments of the present application, the clamping mechanism includes a connecting plate, a first extrusion screw and a second extrusion screw, the first extrusion screw and the second extrusion screw are respectively passed through the two ends of the connecting plate, and the first extrusion screw and the second extrusion screw are both threadedly connected to the connecting plate, the first extrusion screw and the second extrusion screw are both abutted against the bottom of the lower pressure plate, the double-hole air nozzle end of the conical double-hole air nozzle mechanism is passed through the connecting plate, and the conical double-hole air nozzle mechanism is arranged between the first extrusion screw and the second extrusion screw.

[0011] According to some embodiments of the present application, first arc-shaped limiting plates are symmetrically arranged at both ends of the lower pressure plate.

[0012] According to some embodiments of the present application, the ratchet self-tightening binding structure includes at least two ratchet tensioning straps, and the two ratchet tensioning straps are arranged side by side on the support plate, and the two ratchet tensioning straps are respectively connected to the bottom of the lower pressure plate and the top of the support plate.

[0013] According to some embodiments of the present application, a through hole corresponding to the conical double-hole air nozzle mechanism is formed on the foam composite body, and the conical double-hole air nozzle mechanism passes through the foam composite body through the through hole.

[0014] In the present application, the size of the upper pressure plate is smaller than the size of the breathing port, and the lower pressure plate is pressed against the breathing port of the breathing valve by the ratchet self-tightening binding structure, so that the upper ends of the upper pressure plate and the conical double-hole air nozzle mechanism are extended into the breathing port, and the lower pressure plate pushes the foam composite to press and seal the breathing port of the breathing valve; by setting the pressing mechanism, the distance between the lower pressure plate and the foam composite is adjusted to adjust the degree of pressing the foam composite against the breathing port, ensuring that the foam composite material expands in a specific direction according to the constraint, and the expansion force is controllable to ensure the sealing effect; the foam composite is fixed by setting the upper and lower pressure plates, and the foam composite is tied to the breathing port of the breathing valve by the ratchet self-tightening binding structure, and the foam composite is expanded under force, Sealing of the breathing port is achieved; the size of the foam composite is much larger than that of the breathing port, and the foam composite is used to expand and seal. The foam composite processed once can adapt to breathing valves of various specifications and sizes and can be reused; the seal is a foam composite material, which can be quickly cut and processed on site with a tool, which is efficient and low cost, and the foam composite has excellent elastic deformation performance. Under the action of the inner and outer plywood and the ratchet self-tightening tie band, it can adapt to the complex sealing surface shape of the breathing port, overcome pits, protrusions, scars, and rough surfaces, make adaptive deformation, strongly wrap the breathing port, and effectively achieve sealing; a unique conical double-hole air nozzle mechanism is adopted, and the mutual cooperation of the conical surface and the foam composite is utilized to achieve effective sealing with compression and expansion. Through this setting, the present application can be used for temporary and efficient sealing of various special-shaped breathing ports of breathing valves, providing good conditions for breathing valve testing, while also reducing sealing costs.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 A front cross-sectional view of a special-shaped space sealing device provided in an embodiment of the present application for testing fluid in a breathing valve;

[0018] Figure 2 A side cross-sectional view of a special-shaped space sealing device provided in an embodiment of the present application for testing fluid in a breathing valve;

[0019] Figure 3 A schematic top view of a special-shaped space sealing device provided in an embodiment of the present application for testing fluid in a breathing valve;

[0020] Figure 4A partial structural front view of the special-shaped space sealing device for breathing valve fluid testing provided by the embodiment of the present application, excluding the ratchet self-tightening binding structure;

[0021] Figure 5 A partial structural top view of the special-shaped space sealing device for breathing valve fluid testing provided by an embodiment of the present application, excluding the ratchet self-tightening binding structure;

[0022] Figure 6 A partial structural side view of the special-shaped space sealing device for breathing valve fluid testing provided by an embodiment of the present application, excluding the ratchet self-tightening binding structure;

[0023] Figure 7 A bottom view of a portion of the structure of the special-shaped space sealing device for breathing valve fluid testing provided by an embodiment of the present application, excluding the ratchet self-tightening binding structure;

[0024] Figure 8 A schematic structural diagram of a conical double-hole air nozzle mechanism provided in an embodiment of the present application;

[0025] Fig. 9 A schematic cross-sectional view of the tapered double-hole air nozzle mechanism provided in an embodiment of the present application.

[0026] Reference numerals:

[0027] Foam composite 110, upper pressing plate 111, lower pressing plate 112, support plate 113, first arc-shaped limiting plate 114, ratchet tensioning binding belt 115, second arc-shaped limiting plate 116;

[0028] A connecting plate 121, a first extrusion screw 122, and a second extrusion screw 123;

[0029] Conical double-hole air nozzle mechanism 130, a first air nozzle 131, and a second air nozzle 132;

[0030] Breathing valve 210 and breathing port 211 . DETAILED DESCRIPTION

[0031] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0032] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0035] At present, in the petrochemical industry, hazardous chemicals industry and fine chemical industry, storage tank pipeline control technology is widely used. Various flammable and explosive gases or liquid-gas mixtures flow in the storage tanks. Therefore, in order to ensure safe production, breathing valves of various specifications are widely used in the storage tank system.

[0036] Since the breathing valve needs to be regularly and compulsorily tested for performance, including leakage and opening pressure, the exhalation port and the inhalation port need to be temporarily sealed during the test. However, due to the large number of breathing valves that need to be tested and the various specifications, and the shapes of the breathing interfaces corresponding to the exhalation port and the inhalation port vary greatly, there are a large number of breathing ports with special-shaped structures and strange structures. In addition, under the condition of poor sealing conditions and high sealing difficulty, the sealing cost of the breathing port of the breathing valve is high and the efficiency is low.

[0037] In order to solve the above-mentioned problems, the present application proposes a special-shaped space sealing device for breathing valve fluid testing. The embodiments of the present application are further explained below in conjunction with the accompanying drawings.

[0038] Reference Figures 1 to 9The present application provides a special-shaped space sealing device for breathing valve fluid testing, comprising: an upper pressing plate 111, a lower pressing plate 112, a foam composite body 110, a conical double-hole air nozzle mechanism 130, a clamping mechanism, a ratchet self-tightening binding structure and a support plate 113; the upper pressing plate 111 is arranged at the top of the foam composite body 110, the lower pressing plate 112 is arranged at the bottom of the foam composite body 110, the conical double-hole air nozzle mechanism 130 is sequentially penetrated through the upper pressing plate 111, the foam composite body 110, the lower pressing plate 112 and the clamping mechanism, the double-hole air nozzle end of the conical double-hole air nozzle mechanism 130 is arranged at the bottom of the clamping mechanism, the clamping mechanism abuts against the bottom of the lower pressing plate 112, and the support plate 113 is provided. The support plate 113 is arranged at the top of the breathing valve 210, and the ratchet self-tightening binding structure is respectively connected to the bottom of the lower pressure plate 112 and the top of the support plate 113; the ratchet self-tightening binding structure is used to press the lower pressure plate 112 against the breathing port 211 of the breathing valve 210 so that the foam composite 110 can seal the breathing port 211 of the breathing valve 210. The size of the foam composite 110 is much larger than the size of the breathing port 211, and the size of the upper pressure plate 111 is smaller than the size of the breathing port 211. The clamping mechanism is used to adjust the distance between the lower pressure plate 112 and the foam composite 110 to adjust the degree of compression of the foam composite 110 against the breathing port 211.

[0039] Specifically, after cutting appropriate foam on site according to the size of the breathing port 211, the composite material is wrapped and applied on the foam to form the foam composite body 110; the foam composite body 110 is fixed by the upper pressing plate 111 and the lower pressing plate 112, and is tied to the breathing port 211 of the breathing valve 210 through the ratchet self-tightening binding structure, and the foam composite body 110 is forced to expand to achieve the sealing of the breathing port 211. The size of the foam composite body 110 is much larger than the size of the breathing port 211, and can adapt to breathing valves 210 of various specifications, without the need to frequently replace the sealing device, and because the sealing part is a foam composite material, it can be temporarily cut and processed on site with a tool, which is efficient and low cost.

[0040] It should be noted that the foam composite 110 is bounded by a ratchet self-tightening binding structure to compress and seal the breathing port 211 of the breathing valve 210 , with controllable force, simple and efficient structure, and easy operation.

[0041] In some embodiments, according to the actual situation of the special-shaped breathing port 211 of the breathing valve 210, the foam elastic composite can be processed into an appropriate shape, which can be a round cake shape, a frustum shape or a trapezoidal table shape, all of which can achieve a good sealing effect, and the embodiments of the present application are not limited here.

[0042] It should be noted that the foam composite 110 is composed of three materials: EPE foam, high temperature resistant butter and plastic wrap. The EPE foam is cut into shape, the surface is coated with butter, and it is wrapped with multiple layers of plastic wrap. The advantages of the three materials in terms of sealing are combined to form the foam composite 110. Because EPE foam is easily deformed and expanded under pressure, the capillaries in the foam are blocked by butter, and the multi-layer plastic wrap has high strength, self-adsorption, self-adhesion, and good sealing, which protects and constrains the foam from cracking and damage under pressure; the foam composite 110 formed by the combination of the three materials can be deformed under pressure, adapt to itself, fill the sealed space, and automatically fill and fit with the pits and protrusions, thereby achieving a sealing effect.

[0043] In the present application, the size of the upper pressure plate 111 is smaller than the size of the breathing port 211, and the lower pressure plate 112 is pressed against the breathing port 211 of the breathing valve 210 by the ratchet self-tightening binding structure, so that the upper ends of the upper pressure plate 111 and the conical double-hole air nozzle mechanism 130 are both extended into the breathing port 211, and the lower pressure plate 112 pushes the foam composite 110 to press and seal the breathing port 211 of the breathing valve 210; by setting the pressing mechanism, the distance between the lower pressure plate 112 and the foam composite 110 is adjusted to adjust the degree of pressing the foam composite 110 against the breathing port 211, to ensure that the foam composite material expands in a specific direction according to the constraint, and the expansion force is controllable to ensure the sealing effect; by setting the upper pressure plate 111 and the lower pressure plate 112 to fix the foam composite 110, and using the ratchet self-tightening binding structure to tie the foam composite 110 to the breathing port 211 of the breathing valve 210, the foam composite The combined body 110 expands under force to achieve sealing of the breathing port 211; the size of the foam composite 110 is much larger than the size of the breathing port 211. The foam composite 110 is used to seal the expansion property. The foam composite 110 processed once can adapt to breathing valves 210 of various specifications and sizes and can be reused; the seal is a foam composite material and can be quickly cut and processed on site with a tool, which is efficient and low in cost. The foam composite 110 has excellent elastic deformation performance, moderate elasticity, strong adaptability, and good sealing effect. Under the action of the inner and outer splints and the ratchet self-tightening tie bands, it can self-adapt to the complex sealing surface shape of the breathing port 211, overcome pits, protrusions, scars, and rough surfaces, make adaptive deformation, strongly wrap the breathing port 211, and effectively achieve sealing; a unique conical double-hole air nozzle mechanism 130 is adopted, and the mutual cooperation of the conical surface and the foam composite 110 is utilized to achieve effective sealing through compression and expansion. Through this setting, the present application can be used for temporary and efficient sealing of various special-shaped breathing ports 211 of breathing valves 210, providing good conditions for testing the breathing valves 210, while also reducing sealing costs, improving the efficiency of online breathing valve 210 detection in the petrochemical industry, improving work efficiency, and meeting production safety requirements.

[0044] Reference Fig. 9It can be understood that the double-hole air nozzle end of the conical double-hole air nozzle mechanism 130 includes a first air nozzle 131 and a second air nozzle 132, the first air nozzle 131 is used to connect to the pressure sensor, and the second air nozzle 132 is used to connect to the air source pipeline.

[0045] It should be noted that the conical surface of the conical double-hole air nozzle mechanism 130 cooperates with the foam composite 110 to achieve sealing under the action of expansion, that is, the conical double-hole air nozzle mechanism 130 can not only effectively achieve sealing, but also can connect the pressure sensor and the air source pipeline to facilitate testing operations.

[0046] Reference Figure 1 to Figure 2 It can be understood that there are two breathing ports 211 of the breathing valve 210 symmetrically arranged, and the number of the upper pressure plate 111, the lower pressure plate 112, the foam composite 110, the conical double-hole air nozzle mechanism 130, the clamping mechanism and the ratchet self-tightening binding structure corresponds to the number of the breathing ports 211.

[0047] It should be noted that the two breathing ports 211 include an exhalation port and an inhalation port, respectively, and the exhalation port and the inhalation port are symmetrically arranged at two ends of the breathing valve 210 .

[0048] In some embodiments, the breathing valve 210 needs to be sealed with a special-shaped breathing port 211, and the sealing condition of the breathing port 211 of the breathing valve 210 is poor, and there are welding slag, protrusions, spikes and gaps at the interface. The steps of making the special-shaped space sealing device for the fluid test of the breathing valve 210 are specifically as follows: draw lines to cut the EPE foam, trim and round the foam, and then drill holes with a hole opener; select high-temperature resistant butter, evenly apply the butter on all surfaces around the foam block, apply more butter on the opening, and wrap the foam block with plastic wrap (wrap at least 15 layers); apply butter to the conical surface of the conical double-hole air nozzle mechanism 130, and wrap the conical surface with 6 layers of plastic wrap. When the conical double-hole air nozzle mechanism 130 passes through the foam hole, a thin plastic bag should be put on in advance to prevent the butter from entering the inner wall of the conical double-hole air nozzle mechanism 130, and the upper and lower sides of the foam composite 110 with the conical double-hole air nozzle mechanism 130 An upper pressure plate 111 and a lower pressure plate 112 are installed on the side; some plastic wrap is laid in advance and butter is applied to the places where there are welding slag and protrusions, corners and damaged places on the breathing port 211 of the breathing valve 210, and the foam composite 110 is fixed to the breathing port 211 with a ratchet self-tightening binding structure. At this time, the ratchet self-tightening binding structure should not be pulled too tight, and a little butter can be applied on the sealing contact surface to enhance the sealing effect; then the binding belt is tightened step by step, sequentially and evenly through the ratchet self-tightening binding structure. Under the extrusion of the ratchet self-tightening binding structure, the foam composite 110 deforms and expands toward the sealing surface, squeezing the gap space until it is completely and tightly fitted to the sealing surface to achieve a sealing effect; the first air nozzle 131 of the conical double-hole air nozzle mechanism 130 is connected to an air pressure gauge or an air pressure sensor, and the second air nozzle 132 is connected to the air source pipeline to test the leakage and opening pressure of the breathing valve 210.

[0049] Reference Figure 4 It can be understood that the clamping mechanism includes a connecting plate 121, a first extrusion screw 122 and a second extrusion screw 123, the first extrusion screw 122 and the second extrusion screw 123 are respectively passed through the two ends of the connecting plate 121, and the first extrusion screw 122 and the second extrusion screw 123 are both threadedly connected to the connecting plate 121, the first extrusion screw 122 and the second extrusion screw 123 are both abutted against the bottom of the lower pressing plate 112, the double-hole air nozzle end of the conical double-hole air nozzle mechanism 130 is passed through the connecting plate 121, and the conical double-hole air nozzle mechanism 130 is arranged between the first extrusion screw 122 and the second extrusion screw 123.

[0050] It should be noted that, by means of the threaded connection between the first extrusion screw 122 and the second extrusion screw 123, it is possible to press or abandon the pressing operation on the lower pressure plate 112 by adjusting the distance between the connecting plate 121 and the first extrusion screw 122 and the second extrusion screw 123, and then drive the foam composite 110 to be pressed toward the breathing port 211 of the breathing valve 210 through the lower pressure plate 112.

[0051] Reference Figure 6 to Figure 7 It can be understood that the first arc-shaped limiting plates 114 are symmetrically arranged at both ends of the lower pressing plate 112 .

[0052] In some embodiments, reference Figure 7 The special-shaped space sealing device for breathing valve fluid testing also includes two first arc-shaped limit plates 114 and two second arc-shaped limit plates 116. The two first arc-shaped limit plates 114 are respectively connected to the side walls of the lower pressure plate 112, and the two first arc-shaped limit plates 114 are symmetrically arranged. The first arc-shaped limit plates 114 are bent along the direction of the foam composite 110. The side wall of the lower pressure plate 112 adjacent to the first arc-shaped limit plate 114 is connected to the second arc-shaped limit plate 116. The two second arc-shaped limit plates 116 are symmetrically arranged, and the second arc-shaped limit plates 116 are bent in the opposite direction of the foam composite 110.

[0053] It should be noted that by providing the first arc-shaped limiting plates 114 at both ends of the lower pressure plate 112, the bottom of the first arc-shaped limiting plates 114 bends inward to better limit the foam composite 110 and prevent the corners of the first arc-shaped limiting plates 114 from being too sharp and cutting the ratchet self-tightening binding structure.

[0054] Reference Figures 1 to 3 It can be understood that the ratchet self-tightening binding structure includes at least two ratchet tensioning straps 115, and the two ratchet tensioning straps 115 are arranged side by side on the support plate 113, and the two ratchet tensioning straps 115 are respectively connected to the bottom of the lower pressure plate 112 and the top of the support plate 113.

[0055] It should be noted that the ratchet tensioning strap 115 has a simple structure and is easy to operate. The ratchet tensioning strap 115 can be easily tightened and is safe and reliable after tightening. The ratchet tensioning strap 115 can be adjusted at any time after it becomes loose. The adjustment process is simple and easy, which greatly saves manpower and material resources.

[0056] In the present embodiment, each foam composite body 110 is provided with two ratchet tensioning straps 115 arranged side by side and at intervals; in some embodiments, more than two ratchet tensioning straps 115 may be provided, and are not limited to the embodiment of the present application.

[0057] It can be understood that a through hole corresponding to the conical double-hole air nozzle mechanism 130 is opened on the foam composite body 110 , and the conical double-hole air nozzle mechanism 130 passes through the foam composite body 110 through the through hole.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] The above is a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

[0060] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A special-shaped space sealing device for breathing valve fluid testing, characterized in that: include: An upper pressing plate, a lower pressing plate, a foam composite body, a conical double-hole air nozzle mechanism, a clamping mechanism, a ratchet self-tightening binding structure and a supporting plate; The upper pressing plate is arranged at the top of the foam composite body, the lower pressing plate is arranged at the bottom of the foam composite body, the conical double-hole air nozzle mechanism is sequentially penetrated through the upper pressing plate, the foam composite body, the lower pressing plate and the clamping mechanism, the double-hole air nozzle end of the conical double-hole air nozzle mechanism is arranged at the bottom of the clamping mechanism, the clamping mechanism abuts against the bottom of the lower pressing plate, the support plate is arranged at the top of the breathing valve, and the ratchet self-tightening binding structure is respectively connected to the bottom of the lower pressing plate and the top of the support plate; The ratchet self-tightening binding structure is used to press the lower pressure plate against the breathing port of the breathing valve so that the foam composite can seal the breathing port of the breathing valve. The size of the foam composite is much larger than the size of the breathing port, and the size of the upper pressure plate is smaller than the size of the breathing port. The clamping mechanism is used to adjust the distance between the lower pressure plate and the foam composite to adjust the degree of compression of the foam composite against the breathing port.

2. The special-shaped space sealing device for breathing valve fluid testing according to claim 1 is characterized in that: The double-hole gas nozzle end of the conical double-hole gas nozzle mechanism includes a first gas nozzle and a second gas nozzle, the first gas nozzle is used to connect to the pressure sensor, and the second gas nozzle is used to connect to the gas source pipeline.

3. The special-shaped space sealing device for breathing valve fluid testing according to claim 1, characterized in that: The breathing valve has two breathing ports symmetrically arranged, and the number of the upper pressing plate, the lower pressing plate, the foam composite body, the conical double-hole air nozzle mechanism, the clamping mechanism and the ratchet self-tightening binding structure corresponds to the number of the breathing ports.

4. The special-shaped space sealing device for breathing valve fluid testing according to claim 1, characterized in that: The clamping mechanism includes a connecting plate, a first extrusion screw and a second extrusion screw, the first extrusion screw and the second extrusion screw are respectively passed through the two ends of the connecting plate, and the first extrusion screw and the second extrusion screw are both threadedly connected to the connecting plate, the first extrusion screw and the second extrusion screw are both abutted against the bottom of the lower pressure plate, the double-hole air nozzle end of the conical double-hole air nozzle mechanism is passed through the connecting plate, and the conical double-hole air nozzle mechanism is arranged between the first extrusion screw and the second extrusion screw.

5. The special-shaped space sealing device for breathing valve fluid testing according to claim 1, characterized in that: First arc-shaped limiting plates are symmetrically arranged at both ends of the lower pressing plate.

6. The special-shaped space sealing device for breathing valve fluid testing according to claim 1, characterized in that: The ratchet self-tightening binding structure includes at least two ratchet tensioning binding belts, the two ratchet tensioning binding belts are arranged side by side on the support plate, and the two ratchet tensioning binding belts are respectively connected to the bottom of the lower pressure plate and the top of the support plate.

7. The special-shaped space sealing device for breathing valve fluid testing according to claim 1, characterized in that: The foam composite body is provided with a through hole corresponding to the conical double-hole air nozzle mechanism, and the conical double-hole air nozzle mechanism passes through the foam composite body through the through hole.

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