A differential pressure indicator

Abstract

The present invention discloses a pressure differential indicator, comprising a base, a pressure ring, and an elastic flexible sheet. The base is provided with a tapered conical opening with a tapered diameter and an axial through hole connected to the center of the conical opening. The flexible sheet is tightly pressed against the large end face of the conical opening of the base via the pressure ring, and a plurality of indicating protrusion structures are provided on the inner wall of the conical opening. The protrusions are arranged in a gradually decreasing shape from the large end face of the conical opening toward the small end face, and can form an interference fit with the flexible sheet to indicate the pressure differential between the two sides of the flexible sheet. The present invention can visually observe the pressure differential between the internal and external environments of the laboratory through the deformation of the flexible sheet, and when the flexible sheet is deformed, the pressure differential value can be roughly understood by the number of corresponding protrusion structures formed thereon.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure difference display equipment, and in particular to a pressure difference indicator. Background Art

[0002] At present, all types of biochemical laboratories require their internal spaces to be kept in a relatively closed or negative pressure environment to prevent samples from leaking out of the laboratory and contaminating the external environment, causing safety accidents. However, there is currently no intuitive indicator device specifically for the pressure difference between the inside and outside of the laboratory in the existing technology, making it difficult for staff to quickly and intuitively understand the internal and external pressure difference between the laboratory and the external environment in real time. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a pressure differential indicator. The elastic flexible sheet in the pressure differential indicator can bend and deform under the action of the pressure difference on both sides and cooperate with the various indicating protrusion structures on the inner wall of the conical opening in the base body, thereby enabling the staff to intuitively understand the pressure difference on both sides of the flexible sheet by corresponding to the number of protrusions formed on the flexible sheet.

[0004] To achieve the above object, the present invention is achieved through the following technical solutions:

[0005] A pressure differential indicator comprises a base, a pressure ring and an elastic flexible sheet. The base is provided with a conical opening with a gradually decreasing diameter and an axial through hole connected to the center of the conical opening. The flexible sheet is tightly pressed onto the large end face of the conical opening of the base through the pressure ring. A plurality of indicating protrusion structures are provided on the inner wall of the conical opening. The structures are arranged in a gradually decreasing shape from the large end face of the conical opening toward the small end face, and can form an interference fit with the flexible sheet to indicate the pressure differential on both sides of the flexible sheet.

[0006] Furthermore, the indicating protrusion structure is composed of a plurality of annular ribs coaxially arranged with the center of the conical opening, and the annular ribs are arranged in a stepped manner from the outside to the inside on the inner wall of the conical opening.

[0007] Furthermore, the flexible sheet is configured as follows: when the air pressure on one side of the pressure ring of the flexible sheet is greater than the air pressure on the side of the seat body, the flexible sheet will be elastically deformed toward the seat body under the action of the pressure difference on both sides and tightly adhere to the inner wall of the conical opening and form an annular convex structure corresponding to the annular rib on the flexible sheet. The greater the pressure difference on both sides of the flexible sheet, the more the flexible sheet bends and deforms toward the bottom of the conical opening, so that the contact area between the flexible sheet and the inner wall of the conical opening increases. The flexible sheet can form a conflict with more annular ribs on the inner wall of the conical opening to form a corresponding number of annular convex structures on the surface of the flexible sheet to intuitively indicate the pressure difference on both sides of the flexible sheet.

[0008] Furthermore, the flexible sheet is a thin film-shaped flexible sheet made of rubber material.

[0009] Furthermore, the pressure ring and the seat body are fastened together via a detachable connecting structure.

[0010] Furthermore, the pressing ring and the seat body are provided with a plurality of coaxial locking hole structures, so that the pressing ring and the seat body are locked together by screws and the flexible sheet is sealed and clamped to the large end face of the conical opening.

[0011] Furthermore, the pressure ring is provided with an annular sealing protrusion, and the seat body is provided with an annular sealing groove corresponding to the annular sealing protrusion.

[0012] Furthermore, a mounting handle for fixing the seat body is provided on one end of the seat body away from the pressure ring.

[0013] The above technical solution has the following advantages or beneficial effects:

[0014] In the pressure differential indicator described in the present invention, a conical opening and an axial through hole are provided on the base body, and a plurality of indicating protrusion structures are arranged in a gradually decreasing shape from the large mouth of the conical opening toward the small mouth direction, and a flexible sheet with elasticity is tightly pressed together at the end face of the large mouth of the conical opening by a pressure ring. When in use, the pressure differential indicator can be sealed and installed on the wall of the laboratory. At the same time, a vent hole connected to the axial through hole is provided on the wall. In this way, the staff can intuitively observe the pressure difference between the inside and outside of the laboratory through the deformation of the flexible sheet. Moreover, when the flexible sheet is deformed, the pressure difference value can be roughly understood by the number of corresponding protrusion structures formed thereon. Preferably, a pressure differential indicator can be installed on the inside and outside of the laboratory wall respectively. In this way, no matter whether the pressure difference between the inside and outside of the laboratory is positive or negative, the difference value can be roughly understood through the pressure differential indicator on the corresponding side, so that when an accident occurs, it is convenient for workers to take timely countermeasures to eliminate safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 2 is a schematic diagram of the three-dimensional structure of a pressure differential indicator according to an embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the exploded three-dimensional structure of the pressure differential indicator according to an embodiment of the present invention.

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the pressure differential indicator according to an embodiment of the present invention from another angle.

[0018] Figure 4 It is a schematic diagram of the exploded three-dimensional structure of the pressure differential indicator according to an embodiment of the present invention from another angle.

[0019] Figure 54 is a structural cross-sectional view of a pressure differential indicator according to an embodiment of the present invention.

[0020] Description of labels:

[0021] 1. Seat body, 2. Pressing ring, 3. Flexible sheet, 11. Conical opening, 12. Axial through hole, 13. Annular rib, 14. Annular sealing groove, 15. Mounting handle, 21. Annular sealing protrusion. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0024] Please refer to the attached Figure 1 To the attached Figure 5 One embodiment of the present invention provides a pressure differential indicator, including a base body 1, a pressure ring 2 and an elastic flexible sheet 3. The base body 1 is provided with a conical opening 11 with a gradually decreasing diameter and an axial through hole 12 connected to the center of the conical opening 11. The flexible sheet 3 is tightly pressed onto the large end face of the conical opening 11 of the base body 1 through the pressure ring 2, and a plurality of indicating protrusion structures are arranged on the inner wall of the conical opening 11 in a gradually decreasing shape from the large mouth direction toward the small mouth direction of the conical opening 11, and can form an interference fit with the flexible sheet 3 to indicate the pressure difference on both sides of the flexible sheet 3. It can be understood that in this embodiment, a conical opening 11 and an axial through hole 12 are provided on the base body 1, and a plurality of indicating protrusion structures are arranged in a gradually decreasing shape from the large mouth direction of the conical opening 11 to the small mouth direction, and a flexible sheet 3 with elasticity is tightly pressed at the large mouth end face of the conical opening 11 through a pressure ring 2. When in use, the pressure differential indicator can be sealed and installed on the wall of the laboratory. At the same time, a vent hole connected to the axial through hole 12 is provided on the wall. In this way, the staff can intuitively observe the pressure difference between the inside and outside of the laboratory through the deformation of the flexible sheet 3. Moreover, when the flexible sheet 3 is deformed, the pressure difference value can be roughly understood by the number of corresponding protrusion structures formed thereon. Preferably, a pressure differential indicator can be installed on the inside and outside of the laboratory wall respectively. In this way, no matter whether the pressure difference between the inside and outside of the laboratory is positive or negative, the difference value can be roughly understood through the pressure differential indicator on the corresponding side, so that when an accident occurs, it is convenient for workers to take timely countermeasures to eliminate safety hazards.

[0025] Please refer to the attached Figure 1 To the attached Figure 5 In one preferred embodiment, the indicating raised structure is composed of a plurality of annular ribs 13 coaxially arranged with the center of the conical opening 11, and each annular rib 13 is arranged in a stepped manner from the outside to the inside on the inner wall of the conical opening 11. However, it should be understood by those skilled in the art that in other embodiments, the indicating raised structure provided on the inner wall of the conical opening 11 is not limited to being composed of a plurality of annular ribs 13 arranged in a stepped manner as disclosed in this embodiment, but may also be a single-point raised structure arranged in a gradually descending order from the outer circumference to the center on the inner wall of the conical opening 11. It may be a simple raised structure or a three-dimensional raised structure with numbers 1, 2, 3 or one, two, three, etc., and each raised structure is not limited to being arranged in a linear manner on the same straight line, and the corresponding raised structures may also be arranged at other positions of corresponding heights. As long as the flexible sheet 3 bends and deforms under the pressure difference on both sides and clings to the inner wall of the conical opening 11 , the corresponding protrusion structure can generate a raised protrusion structure at the corresponding position of the flexible sheet 3 to indicate the size of the pressure difference.

[0026] Please refer to the attached Figure 1 To the attached Figure 5 In one preferred embodiment, the flexible sheet 3 is configured as follows: when the air pressure on the pressure ring side of the flexible sheet 3 is greater than the air pressure on the seat side, the flexible sheet 3 will be elastically deformed toward the seat 1 under the action of the pressure difference on both sides and tightly adhere to the inner wall of the conical opening 11 and form an annular convex structure corresponding to the annular rib 13 on the flexible sheet 3, and the greater the pressure difference value on both sides of the flexible sheet 3 (the air pressure value on the pressure ring side minus the air pressure value on the seat side), the more the flexible sheet 3 bends and deforms toward the bottom of the conical opening 11, so that the contact area between the flexible sheet 3 and the inner wall of the conical opening 11 increases, and the more annular ribs 13 on the inner wall of the conical opening 11 that the flexible sheet 3 can form a conflict with, so as to form a corresponding number of annular convex structures on the surface of the flexible sheet 3 to intuitively indicate the pressure difference on both sides of the flexible sheet 3. It can be understood that in this embodiment, the greater the difference between the air pressure value on the pressure ring side of the flexible sheet 3 and the air pressure value on the seat body side, the more parts of the flexible sheet 3 will be tightly attached to the inner wall of the conical opening 11. In this way, a corresponding number of annular protrusion structures can be generated on the flexible sheet 3 through each corresponding annular rib 13. The larger the annular protrusion structure generated by the flexible sheet 3, the greater the pressure difference on both sides.

[0027] Please refer to the attached Figure 2 , Attachment Figure 4 and attached Figure 5In one preferred embodiment, the flexible sheet 3 is a thin film-shaped flexible sheet made of rubber. However, those skilled in the art will readily appreciate that in other embodiments, the flexible sheet 3 may also be made of other materials having the same or similar elastic properties as rubber, and is not limited to a thin film-shaped sheet structure made of rubber.

[0028] Please refer to the attached Figure 1 To the attached Figure 4 In one preferred embodiment, the pressure ring 2 and the base body 1 are fastened together by a detachable connecting structure. Preferably, a plurality of lock hole structures are provided on the pressure ring 2 and the base body 1, which are coaxially arranged up and down, so that the pressure ring 2 and the base body 1 are locked together by screws and the flexible sheet 3 is sealed and clamped to the large end face of the conical opening 11. In this embodiment, preferably, an annular sealing protrusion 21 is provided on the pressure ring 2, and an annular sealing groove 14 corresponding to the annular sealing protrusion 21 is provided on the base body 1. Through the mutual cooperation of the annular sealing groove 14 corresponding to the annular sealing protrusion 21, the flexible sheet 3 can be well sealed and crimped to the large end face of the conical opening 11 of the base body 1 through the pressure ring 2. However, those skilled in the art should understand that in other embodiments, the pressure ring 2 and the base body 1 can also be detachably connected together by other detachable connecting structures such as snaps, and are not limited to the screw locking disclosed in this embodiment.

[0029] Please refer to the attached Figure 1 The end of the base body 1 away from the pressure ring 2 is provided with a mounting handle 15 for fixing the base body 1. By fitting the mounting handle 15 into the vent hole of the wall, the pressure differential indicator can be more firmly fixed to the wall, and a good sealing performance can be achieved by injecting glass glue into the gap between the pressure differential indicator and the wall.

[0030] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A differential pressure indicator, characterized in that: The invention comprises a seat body (1), a pressure ring (2) and an elastic flexible sheet (3); the seat body (1) is provided with a conical opening (11) with a gradually decreasing diameter and an axial through hole (12) connected to the center of the conical opening (11); the flexible sheet (3) is tightly pressed onto the large end face of the conical opening (11) of the seat body (1) through the pressure ring (2); and a plurality of indicating protrusion structures are provided on the inner wall of the conical opening (11), which are arranged in a gradually decreasing shape from the large end face of the conical opening (11) toward the small end face and can form a conflict with the flexible sheet (3) to indicate the pressure difference between the two sides of the flexible sheet (3).

2. The pressure differential indicator according to claim 1, characterized in that: The indicating protrusion structure is composed of a plurality of annular ribs (13) coaxially arranged with the center of the conical opening (11), and each annular rib (13) is arranged on the inner wall of the conical opening (11) in a stepped manner from the outside to the inside.

3. The pressure differential indicator according to claim 2, characterized in that: The flexible sheet (3) is configured such that when the air pressure on one side of the pressure ring of the flexible sheet (3) is greater than the air pressure on one side of the seat body, the flexible sheet (3) will be elastically deformed toward the seat body (1) under the action of the pressure difference on both sides and will be closely attached to the inner wall of the conical opening (11), and an annular convex structure corresponding to the annular rib (13) will be formed on the flexible sheet (3), and the greater the pressure difference on both sides of the flexible sheet (3), the more the flexible sheet (3) bends and deforms toward the bottom of the conical opening (11), so that the contact area between the flexible sheet (3) and the inner wall of the conical opening (11) increases, and the more annular ribs (13) on the inner wall of the conical opening (11) the flexible sheet (3) can form a conflict with, so as to form a corresponding number of annular convex structures on the surface of the flexible sheet (3) to intuitively indicate the pressure difference on both sides of the flexible sheet (3).

4. The pressure differential indicator according to any one of claims 1 to 3, characterized in that: The flexible sheet (3) is a thin film-shaped flexible sheet made of rubber material.

5. The pressure differential indicator according to any one of claims 1 to 3, characterized in that: The pressing ring (2) and the seat body (1) are fastened together via a detachable connecting structure.

6. The pressure differential indicator according to claim 5, characterized in that: The pressing ring (2) and the seat (1) are provided with a plurality of locking hole structures which are coaxially arranged up and down, so that the pressing ring (2) and the seat (1) are locked together by screws and the flexible sheet (3) is sealed and clamped to the large end face of the conical opening (11).

7. The pressure differential indicator according to any one of claims 1 to 3, characterized in that: An annular sealing protrusion (21) is provided on the pressing ring (2), and an annular sealing groove (14) corresponding to the annular sealing protrusion (21) is provided on the seat body (1).

8. The pressure differential indicator according to any one of claims 1 to 3, characterized in that: An installation handle (15) for fixing the seat body (1) is provided on one end of the seat body (1) away from the pressure ring (2).

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