CN218211733U - Low-range micro-difference pressure sensor structure - Google Patents

Abstract

The utility model discloses a poor pressure sensor technical field's a low-range poor pressure sensor structure a little, including casing, coupling, collet chuck includes cylinder section, round platform section, presss from both sides the tube hole, sets up a plurality of bar breachs that link up with pressing from both sides the tube hole on the round platform section outer peripheral edge, and common cover is equipped with the unsteady board in two cylinder sections, is equipped with the taper groove that matches with the round platform section appearance on the unsteady board, and the unsteady board is moved by its direction of keeping away from the casing of elastic drive subassembly drive for round platform section card is gone into in the taper groove. The floating plate is driven by the elastic driving assembly to move towards the outer side of the shell, so that the circular truncated cone section can be clamped into the conical groove, the inner wall of the conical groove generates radial and inner extrusion force on the outer wall of the circular truncated cone section, the circular truncated cone section is elastically contracted, an air pipe which is inserted in the pipe joint and is located in the pipe clamping hole is clamped tightly, gaps between the air pipe and the pipe joint are reduced, and the influence on the detection precision of the differential pressure sensor can be reduced.

Description

Low-range micro-difference pressure sensor structure

Technical Field

The utility model relates to a poor pressure sensor technical field specifically is a low-range poor pressure sensor structure.

Background

A differential pressure sensor is a sensor used to measure the difference between two pressures, and is typically used to measure the pressure difference across a device or component. For example, in a ventilator apparatus, the pressure at the time of inhalation or exhalation of a patient is detected by a micro differential pressure sensor, thereby controlling the air supply time and exhalation time.

Because the current low-range differential pressure sensor has a small measurement range, the air tightness between the air pipe connected with the differential pressure sensor and the pipe joint influences the detection precision of the differential pressure sensor to a great extent, namely, when a gap is generated between the air pipe and the pipe joint on the differential pressure sensor, air leakage is caused, the detection precision of the differential pressure sensor is influenced, and therefore the air tightness between the pipe joint on the differential pressure sensor and an external air pipe needs to be ensured.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art's defect, provide a low range differential pressure sensor structure, in order to solve the above-mentioned technical problem, the utility model provides a following technical scheme:

the utility model provides a: the utility model provides a low-range differential pressure sensor structure, includes differential pressure sensor's casing and locates two coupling on the casing, be equipped with two collet chuck on the casing, two collet chuck corresponds two coupling respectively, collet chuck is including connecting the cylinder section on the casing, the coaxial round platform section that is equipped with of one end that the casing was kept away from to the cylinder section, the external diameter of round platform section scales up in proper order towards the direction of keeping away from the casing, the coaxial double-layered nose hole of a through-hole form of having seted up in the round platform section, the coupling is located double-layered nose hole, set up a plurality ofly on the round platform section outer peripheral edge and press from both sides the bar breach that the nose hole link up, two the common cover is equipped with on the cylinder section floats the board, be equipped with the taper groove that matches with round platform section appearance on the float board, float the board by its direction removal of keeping away from the casing of elastic drive subassembly drive, make round platform section card is gone into in the taper groove.

In the structure of the low-range micro-differential pressure sensor, the elastic driving assembly comprises a groove arranged on the floating plate, a return spring is arranged in the groove, and one end of the return spring, which penetrates out of the groove, elastically abuts against the outer wall of the shell.

In the structure of the low-range differential pressure sensor, a fixed column is arranged on one surface of the floating plate away from the shell, a limiting block is fixedly connected to the fixed column, a cover plate is sleeved on the fixed column, two ends of the cover plate are respectively provided with a rubber layer, when the cover plate rotates to the length direction of the cover plate to be parallel to the length direction of the floating plate, the two rubber layers respectively cover the openings of the two pipe joints, a buffer spring is sleeved on the fixed column, and two ends of the buffer spring in the elastic direction respectively elastically abut against the cover plate and the limiting block.

In the structure of the low-range micro-differential pressure sensor, the cover plate is provided with a plurality of bumps on one surface facing the shell, and the floating plate is provided with positioning grooves for clamping the bumps.

In the structure of the low-range micro-differential pressure sensor, the whole elastic chuck is made of engineering plastic.

Compared with the prior art, the beneficial effects of the utility model are that: the floating plate is driven by the elastic driving assembly to move towards the outer side of the shell, so that the circular truncated cone section can be clamped into the circular truncated cone groove, the inner wall of the circular truncated cone groove generates radial and inner extrusion force on the outer wall of the circular truncated cone section, the circular truncated cone section generates elastic contraction, the air pipe which is inserted in the pipe joint and is positioned in the pipe clamping hole is clamped, gaps between the air pipe and the pipe joint are reduced, the influence on the detection precision of the differential pressure sensor can be reduced, the cover plate is arranged to rotate, when the cover plate rotates to the length direction of the cover plate is consistent with the length direction of the floating plate, the mouth parts of the two pipe joints can be sealed by the two rubber layers, the idle state is realized, external foreign matters and dust can not enter the pipe joints, and the influence on the detection precision of the differential pressure sensor is further caused.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is an assembly structure diagram of a low-range differential pressure sensor structure according to the present invention;

FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1;

fig. 3 is an enlarged schematic view of a portion a of fig. 2.

In the figure: 1-shell, 2-cylindrical section, 3-floating plate, 4-buffer spring, 5-limiting block, 6-cover plate, 7-pipe joint, 8-rubber layer, 9-lug, 10-strip notch, 11-reset spring, 12-pipe clamping hole, 13-circular table section, 14-fixed column, 15-positioning groove and 16-conical groove.

Detailed Description

The preferred embodiments of the present invention will be described hereinafter with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are merely for purposes of illustration and explanation, and are not intended to limit the present invention.

Examples

As shown in fig. 1-3, the present embodiment provides a technical solution: a low-range differential pressure sensor structure comprises a shell 1 of a differential pressure sensor and two pipe joints 7 arranged on the shell 1, two elastic chucks are arranged on the shell 1 and respectively correspond to the two pipe joints 7, each elastic chuck comprises a cylindrical section 2 connected to the shell 1, one end of the cylindrical section 2, which is far away from the shell 1, is coaxially provided with a circular table section 13, the outer diameter of the circular table section 13 is sequentially increased in a direction far away from the shell 1, the circular table section 13 is coaxially provided with a pipe clamping hole 12 in a through hole form, each pipe joint 7 is positioned in the pipe clamping hole 12, the outer periphery of the circular table section 13 is provided with a plurality of strip-shaped notches 10 communicated with the pipe clamping holes 12, two cylindrical sections 2 are jointly sleeved with a floating plate 3, the floating plate 3 is provided with a conical groove 16 matched with the appearance of the circular table section 13, the floating plate 3 is driven by an elastic driving assembly to move in a direction far away from the shell 1, when an external air pipe is installed, the floating plate is firstly extruded towards the direction of the shell 1 to ensure that the conical groove on the floating plate is separated from the clamping state with the conical groove 16, then the external air pipe is inserted and sleeved on the two pipe connectors, the air pipe is positioned in the pipe clamping hole, after the air pipe is inserted in place, a small gap is formed between the air pipe and the outer wall of the pipe connector due to the influence of the manufacturing precision of any one of the air pipe and the pipe connector, and further the detection precision of the differential pressure sensor is influenced due to the air leakage, at the moment, only the floating plate needs to be loosened, the elastic driving component drives the floating plate to move towards the direction far away from the shell, and the conical groove can be clamped, so that the inner wall of the conical groove generates the extrusion force on the radial inner side of the outer periphery of the conical groove, the conical groove generates the elastic shrinkage, and the pipe clamping hole clamps the air pipe, therefore, the gap between the air pipe and the pipe joint can be reduced, and the detection precision of the differential pressure sensor is further prevented from being influenced.

The elastic driving assembly in the embodiment comprises a groove arranged on the floating plate 3, a return spring 11 is arranged in the groove, one end, penetrating out of the groove, of the return spring 11 elastically abuts against the outer wall of the shell 1, and the return spring elastically abuts against the floating plate, so that the floating plate moves towards the direction far away from the shell.

The elastic chuck in the embodiment is integrally made of engineering plastic materials, so that the elastic deformation degree of the elastic chuck is better, and the plastic deformation is reduced.

In this embodiment, a fixing column 14 is disposed on a side of the floating plate 3 away from the housing 1, a limiting block 5 is fixedly connected to the fixing column 14, a cover plate 6 is sleeved on the fixing column 14, two ends of the cover plate 6 are respectively provided with a rubber layer 8, when the cover plate 6 rotates to a position where the length direction of the cover plate is parallel to the length direction of the floating plate 3, the two rubber layers 8 respectively shield mouth portions of the two pipe joints 7, a buffer spring 4 is wound on the fixing column 14, two ends of the elastic direction of the buffer spring 4 respectively elastically abut against the cover plate 6 and the limiting block 5, when the differential pressure sensor is in an idle state, the two pipe joints are exposed outside, at this time, a foreign object in an external environment may enter the housing through the pipe joints, and further may affect the detection accuracy of the differential pressure sensor, at this time, by rotating the cover plate, the length direction of the cover plate is parallel to the length direction of the floating plate, and further, the two rubber layers can rotate to correspond to the pipe joints, and under the elastic abutting against the elastic force of the floating plate, the two rubber layers can respectively abut against end surfaces of the pipe joints, and further seal the pipe joints, thereby reducing the phenomenon that the foreign object enters the pipe joints.

The one side of apron 6 towards casing 1 in this embodiment is equipped with a plurality of lugs 9, be equipped with the constant head tank 15 that supplies lug 9 block on the floating plate 3, when rotating the apron, at first stir the apron toward the direction of stopper, make the apron produce the compression to buffer spring, and make the apron rotate 90, then loosen the apron, elasticity through buffer spring to the apron is to the apical force, make the apron remove towards the casing direction, and make the lug card go into in the corresponding constant head tank, make the rubber layer on the apron seal when the butt-pipe joint like this, can not produce not hard up.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a low-range differential pressure sensor structure, includes differential pressure sensor's casing (1) and locates two coupling (7) on casing (1), its characterized in that, be equipped with two collet chuck, two on casing (1) collet chuck corresponds two coupling (7) respectively, collet chuck is including connecting cylinder section (2) on casing (1), the one end coaxial of casing (1) is kept away from in cylinder section (2) is equipped with round platform section (13), the external diameter of round platform section (13) is progressively increased in proper order towards the direction of keeping away from casing (1), coaxial clamp pipe hole (12) of having seted up a through-hole form on round platform section (13), coupling (7) are located clamp pipe hole (12), set up a plurality of bar breach (10) that link up with clamp pipe hole (12) on round platform section (13) outer peripheral edges, two the common cover is equipped with float board (3) on cylinder section (2), be equipped with taper groove (16) that match with round platform section (13) appearance on float board (3), float board (3) are driven assembly (3) by elasticity drive assembly towards the direction card and keep away from its removal casing (13) for the taper groove (16) card is gone into.

2. The structure of the low-range micro-differential pressure sensor according to claim 1, wherein the elastic driving component comprises a groove arranged on the floating plate (3), a return spring (11) is arranged in the groove, and one end of the return spring (11) penetrating through the groove elastically abuts against the outer wall of the shell (1).

3. The structure of the low-range micro-differential pressure sensor according to claim 1, wherein a fixed column (14) is arranged on one surface of the floating plate (3) far away from the housing (1), a limit block (5) is fixedly connected to the fixed column (14), a cover plate (6) is sleeved on the fixed column (14), rubber layers (8) are respectively arranged at two ends of the cover plate (6), when the cover plate (6) rotates to the length direction of the cover plate to be parallel to the length direction of the floating plate (3), the two rubber layers (8) respectively shield the mouth parts of the two pipe joints (7), a buffer spring (4) is wound on the fixed column (14), and two ends of the buffer spring (4) in the elastic direction respectively elastically abut against the cover plate (6) and the limit block (5).

4. A structure of a low range differential pressure sensor according to claim 3, characterized in that the cover plate (6) has a plurality of protrusions (9) on its surface facing the housing (1), and the floating plate (3) has positioning slots (15) for the protrusions (9) to engage.

5. The structure of claim 1, wherein the collet is made entirely of an engineering plastic material.

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