CN114377735A - Differential pressure indicator - Google Patents

Abstract

The invention discloses a pressure difference indicator, which comprises a seat body, a pressing ring and an elastic flexible sheet, wherein the seat body is provided with a conical opening with a gradually-reduced caliber and an axial through hole communicated with the center of the conical opening, the flexible sheet is tightly pressed and connected to the end surface of a large opening of the conical opening of the seat body through the pressing ring, and a plurality of indicating convex structures which are arranged in a gradually-reduced manner from the direction of the large opening of the conical opening to the direction of a small opening and can form abutting fit with the flexible sheet to indicate the pressure difference on two sides of the flexible sheet are arranged on the inner wall of the conical opening. According to the invention, the pressure difference condition of the indoor environment and the outdoor environment of the laboratory can be visually observed through the deformation of the flexible sheet, and the pressure difference value can be roughly known through the number of the convex structures correspondingly formed on the flexible sheet when the flexible sheet is deformed.

Description

a differential pressure indicator

technical field

The invention relates to the technical field of differential pressure display devices, in particular to a differential pressure indicator.

Background technique

At present, all kinds of biochemical laboratories require their internal space to be kept in a relatively closed or negative pressure environment to prevent safety accidents caused by leakage of samples in the laboratory and contamination of the external environment. The visual indication device of the pressure difference inside and outside the laboratory makes it difficult for the staff to quickly and intuitively understand the pressure difference between the inside and outside of the laboratory and the external environment in real time.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention provides a differential pressure indicator. The flexible sheet with elasticity in the differential pressure indicator can be bent and deformed under the action of the pressure difference on both sides, and is connected with the inner wall of the conical opening in the seat body. Each indicator protrusion structure is matched, so that it is convenient for 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.

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

A differential pressure indicator, comprising a seat body, a pressure ring and an elastic flexible sheet, the seat body is provided with a conical opening with a tapered diameter and an axial through hole communicating with the center of the conical opening, the flexible sheet The pressure ring is tightly crimped on the end face of the large mouth of the conical opening of the seat body, and on the inner wall of the conical opening, a plurality of tapered openings are arranged in a gradually lowering shape from the large mouth direction of the conical opening to the small mouth direction, and can be formed with the flexible sheet. The interference fit is used to indicate the indicating protrusion structure of the pressure difference between the two sides of the flexible sheet.

Further, the indicating protrusion structure is composed of a plurality of annular ribs arranged coaxially with the center of the conical opening, and the annular ribs are arranged on the inner wall of the conical opening in a stepped shape that gradually decreases from outside to inside.

Further, the flexible sheet is configured such that when the air pressure on the pressure ring side of the flexible sheet is greater than the air pressure on the seat body side, the flexible sheet will elastically deform towards the seat body direction under the action of the pressure difference between the two sides and stick to the cone. An annular convex structure corresponding to the annular rib is formed on the inner wall of the conical opening and on the flexible sheet. The contact area between the sheet and the inner wall of the conical opening increases, and the flexible sheet can 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 visually indicate the pressure on both sides of the flexible sheet. difference size.

Further, the flexible sheet is a film-like flexible sheet of rubber material.

Further, the pressure ring and the base are fastened together by a detachable connection structure.

Further, the pressure ring and the seat body are provided with a number of lock hole structures arranged coaxially up and down, so that the pressure ring and the seat body are locked together by screws and the flexible sheet is tightly clamped and fixed on the large end face of the conical opening. place.

Further, 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.

Further, the end of the seat body away from the pressure ring is provided with a mounting handle for fixing the seat body.

The above-mentioned technical scheme has the following advantages or beneficial effects:

In the differential pressure indicator according to the present invention, a conical opening and an axial through hole are provided on the seat body, and a plurality of conical openings are arranged on the inner wall of the conical opening and gradually decrease from the direction of the large mouth to the direction of the small mouth. The indicator protrusion structure is arranged, and an elastic flexible sheet is tightly crimped by a pressure ring at the end face of the large conical opening. When in use, the differential pressure indicator can be sealed on the wall of the laboratory. At the same time, a ventilation hole connected to the axial through hole is opened on the wall, so that the staff can intuitively observe the environmental pressure difference inside and outside the laboratory through the deformation of the flexible sheet, and when the flexible sheet is deformed, the corresponding The number of protruding structures formed on it can roughly understand the pressure difference value. Preferably, a pressure difference indicator can be installed on the inside and outside of the laboratory wall, so that no matter the pressure difference between the inside and outside of the laboratory is positive. The value or negative value can be roughly understood through the pressure difference indicator on the corresponding side, so that in the event of an accident, it is convenient for workers to take timely countermeasures to relieve potential safety hazards.

Description of drawings

FIG. 1 is a schematic three-dimensional structure diagram of a differential pressure indicator according to an embodiment of the present invention.

FIG. 2 is an exploded schematic diagram of the three-dimensional structure of the differential pressure indicator according to the embodiment of the present invention.

FIG. 3 is a schematic three-dimensional structural diagram of another angle of the differential pressure indicator according to the embodiment of the present invention.

FIG. 4 is an exploded schematic diagram of another perspective three-dimensional structure of the differential pressure indicator according to the embodiment of the present invention.

5 is a structural cross-sectional view of a differential pressure indicator according to an embodiment of the present invention.

Label description:

1. Seat body, 2. Pressure ring, 3. Flexible sheet, 11. Conical opening, 12. Axial through hole, 13. Annular rib, 14. Annular sealing groove, 15. Mounting handle, 21. Annular seal Raised.

Detailed ways

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

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", " The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, so as to The specific orientation configuration and operation are therefore not to be construed as limitations of the present invention.

Referring to Figures 1 to 5, an embodiment of the present invention provides a differential pressure indicator, which includes a seat body 1, a pressure ring 2 and an elastic flexible sheet 3. The seat body 1 is provided with a diameter gradually increasing A constricted conical opening 11 and an axial through hole 12 communicating with the center of the conical opening 11, the flexible sheet 3 is tightly crimped on the large end face of the conical opening 11 of the base body 1 through the pressure ring 2, and is in the conical shape. The inner wall of the opening 11 is provided with a plurality of indicating protrusions that are arranged in a gradually lowering shape from the large mouth direction of the conical opening 11 to the small mouth direction, and can form a conflicting fit with the flexible sheet 3 to indicate the size of the pressure difference on both sides of the flexible sheet 3 . structure. 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 on the inner wall of the conical opening 11 are arranged a plurality of conical openings 11 from the large mouth direction to the small mouth direction. The indicator convex structure is arranged in a gradually lowering shape, and an elastic flexible sheet 3 is tightly crimped by a pressure ring 2 at the end face of the large mouth of the conical opening 11. When in use, the differential pressure indicator can be installed in a sealed manner. On the wall of the laboratory, at the same time, there is a ventilation hole connected to the axial through hole 12 on the wall, so that the staff can intuitively observe the environmental pressure difference inside and outside the laboratory through the deformation of the flexible sheet 3, and , when the flexible sheet 3 is deformed, the pressure difference value can be roughly understood by the corresponding number of raised structures formed on it. Preferably, a pressure difference indicator can be installed on the inside and outside of the laboratory wall, so that Regardless of whether the pressure difference between the inside and outside of the laboratory is positive or negative, the pressure difference indicator on the corresponding side can roughly understand the difference, so that in the event of an accident, it is convenient for workers to take timely countermeasures to eliminate potential safety hazards.

Please refer to FIG. 1 to FIG. 5 , in one of the preferred embodiments, 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 in a conical shape. The inner wall of the opening 11 is arranged in a stepped shape gradually decreasing from the outside to the inside. However, those skilled in the art should understand that, in other embodiments, the indicator protrusion structures disposed on the inner wall of the conical opening 11 are not limited to the annular ribs 13 arranged in a plurality of steps disclosed in this embodiment. It can also be a single-point convex structure that is arranged at a lower and lower interval from the outer circumference to the center on the inner wall of the conical opening 11. It can be a simple convex structure, or it can be 1, 2, 3, or one or two. The three-dimensional digital raised structures are not limited to be arranged on the same straight line in a straight line and gradually lower, and the corresponding raised structures can also be arranged at other positions corresponding to the height. As long as the flexible sheet 3 is bent and deformed under the action of the pressure difference between the two sides and is in close contact with the inner wall of the conical opening 11, the corresponding convex structure can generate a raised convex structure at the corresponding position of the flexible sheet 3 for use in Indicate the size of the differential pressure.

Please refer to accompanying drawings 1 to 5 , in one of the preferred embodiments, the flexible sheet 3 is configured such that when the air pressure on the pressure ring side of the flexible sheet 3 is greater than the air pressure on the seat body side, the flexible sheet 3 is at Under the action of the pressure difference on both sides, it will elastically deform in the direction of the seat body 1 and stick 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 flexible sheet 3 The greater the pressure difference between the two sides (the air pressure value on the pressure ring side minus the air pressure value on the seat side), the more the flexible sheet 3 is bent and deformed toward the bottom of the conical opening 11, so that the flexible sheet 3 and the conical opening are bent and deformed. The contact area of the inner wall of the flexible sheet 11 is increased, and the flexible sheet 3 can form a conflict with the more annular ribs 13 on the inner wall of the conical opening 11 to form a corresponding number of annular raised structures on the surface of the flexible sheet 3 to visually indicate the two sides of the flexible sheet 3. pressure difference. It can be understood that, in this embodiment, when the difference between the air pressure value of the pressure ring side of the flexible sheet 3 minus the air pressure value of the seat body side is greater, the flexible sheet 3 will have more parts that are in close contact with the conical shape. On the inner wall of the opening 11, in this way, a corresponding number of annular convex structures can be generated on the flexible sheet 3 through the corresponding annular ribs 13. The larger the annular convex structure corresponding to the flexible sheet 3, the greater the pressure difference between the two sides. bigger.

Please refer to FIG. 2 , FIG. 4 and FIG. 5 , in one of the preferred embodiments, the flexible sheet 3 is a film-shaped flexible sheet made of rubber material. However, those skilled in the art should immediately understand that, in other embodiments, the flexible sheet 3 can also be made of other materials with the same or similar elastic properties as rubber, and is not limited to a film-like structure made of rubber materials.

Please refer to FIG. 1 to FIG. 4 , in one of the preferred embodiments, the pressure ring 2 and the seat body 1 are fastened together by a detachable connection structure. Preferably, a plurality of locking hole structures are provided on the pressure ring 2 and the base body 1, respectively, which are arranged coaxially 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 tightly clamped and fixed on the At the large end face of the conical opening 11 . In this embodiment, preferably, the pressure ring 2 is provided with an annular sealing protrusion 21 , and the seat body 1 is provided with an annular sealing groove 14 corresponding to the annular sealing protrusion 21 . Through the mutual cooperation of the annular sealing grooves 14 correspondingly provided by the annular sealing protrusions 21 , the flexible sheet 3 can be well sealed on 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 seat body 1 can also be detachably connected together through other detachable connecting structures such as snaps, which are not limited to those in this embodiment. Open screw locking.

Referring to FIG. 1 , an end of the seat body 1 away from the pressure ring 2 is provided with a mounting handle 15 for fixing the seat body 1 . By fitting the mounting handle 15 into the vent hole of the wall, the differential pressure indicator can be more stably installed and fixed on the wall, and can be achieved by injecting glass glue into the gap between the differential pressure indicator and the wall Good sealing installation performance.

As mentioned above, the embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be used for the foregoing implementations. The technical solutions described in the examples are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention, so those of ordinary skill in the art All other embodiments obtained without creative work fall within the protection scope of the present invention.

Claims (8)

1. A differential pressure indicator, comprising: including pedestal (1), clamping ring (2) and have elastic flexible piece (3), set up a bore and be conical opening (11) of convergent form and one axial through-hole (12) with conical opening (11) center intercommunication on pedestal (1), flexible piece (3) closely ground joint is in conical opening (11) major orifice end face department of pedestal (1) through clamping ring (2), and be provided with a plurality ofly on the inner wall of conical opening (11) and be gradually low form by conical opening (11) major orifice direction towards the minor orifice direction and arrange, and can form conflict cooperation with flexible piece (3) and be used for instructing the protruding structure of instruction of flexible piece (3) both sides pressure differential size.

2. The differential pressure indicator of claim 1, wherein: the indication convex structure is composed of a plurality of annular convex ribs (13) which are coaxially arranged with the center of the conical opening (11), and each annular convex rib (13) is arranged on the inner wall of the conical opening (11) in a step shape which is gradually lowered from outside to inside.

3. The differential pressure indicator of claim 2, wherein: the flexible sheet (3) is configured to: when the air pressure on one side of the pressing ring of the flexible sheet (3) is larger than the air pressure on one side of the base body, the flexible sheet (3) generates elastic deformation towards the base body (1) under the action of the pressure difference on the two sides to cling to the inner wall of the conical opening (11) and form an annular convex structure corresponding to the annular convex rib (13) on the flexible sheet (3), and the larger the pressure difference value on the two sides of the flexible sheet (3), the more the flexible sheet (3) bends and deforms towards the bottom direction of the conical opening (11) so as to increase the contact area between the flexible sheet (3) and the inner wall of the conical opening (11), and the more the annular convex ribs (13) on the inner wall of the conical opening (11) can form collision to form a corresponding number of annular convex structures on the surface of the flexible sheet (3) so as to visually indicate the pressure difference on the two sides of the flexible sheet (3).

4. A differential pressure indicator as claimed in any one of claims 1 to 3, wherein: the flexible sheet (3) is a rubber film-shaped flexible sheet.

5. A differential pressure indicator as claimed in any one of claims 1 to 3, wherein: the pressing ring (2) and the base body (1) are fastened and connected together through a detachable connecting structure.

6. The differential pressure indicator of claim 5, wherein: the pressing ring (2) and the seat body (1) are provided with a plurality of lock hole structures which are coaxially arranged up and down respectively, so that the pressing ring (2) and the seat body (1) are locked together through screws and the flexible sheet (3) is clamped and fixed on the large-opening end face of the conical opening (11) in a sealing manner.

7. A differential pressure indicator as claimed in any one of claims 1 to 3, wherein: an annular sealing bulge (21) is arranged on the pressing ring (2), and an annular sealing groove (14) corresponding to the annular sealing bulge (21) is arranged on the seat body (1).

8. A differential pressure indicator as claimed in any one of claims 1 to 3, wherein: and one end of the seat body (1) far away from the pressing ring (2) is provided with a mounting handle (15) for fixing the seat body (1).

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