Mechanical minimum pressure alarm
By adopting elastic diaphragm to sense the pressure of the medium and combining the damper and limit plate design, the sensor has high requirements for power supply stability and high cost, and a low-cost, high-stability and high-reliability pressure alarm is achieved, which is suitable for pressure detection of fuel pipelines.
Patent Information
- Application Number
- CN202422021278.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-20
AI Technical Summary
Existing pressure signal detection sensors have high requirements for power supply stability, are prone to static electricity and overvoltage damage, which cannot meet the requirements for fuel pressure measurement in fuel pipelines, and conventional mechanical alarms are costly and lack reliability.
The elastic diaphragm is used to sense the pressure of the medium, and the mechanical contacts are controlled through the elastic displacement of the diaphragm to achieve pressure alarm, and a damper is installed at the pressure guide end to reduce the damage of instantaneous high pressure and particle impurities, and use limiting plates and reinforced shrapnel components to improve stability.
It realizes low-cost, high stability and high reliability pressure alarm functions, avoids damage and false alarms of the diaphragm in high-pressure environments, and improves the reliability and durability of the equipment.
Smart Images
Figure CN223064739U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure alarms, and particularly to a mechanical minimum pressure alarm. Background Art
[0002] The minimum pressure alarm (signaler) is commonly used to monitor the fuel pressure threshold of the inlet of a gear pump, and sends an alarm signal to an electronic controller when the fuel pressure is too low; the detection of the minimum pressure in the engine fuel pipeline can timely reflect faults such as pipeline damage and oil pump failure, can avoid pipeline damage and leakage accidents, and reduce downtime to ensure operation safety. Conventional pressure signal detection sensors have high requirements for power supply stability and are prone to electrostatic and overvoltage damage. In view of the fuel pressure measurement requirements in the fuel pipeline, a mechanical minimum fuel pressure signal alarm is needed to solve the above technical problems. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a mechanical minimum pressure alarm, which uses an elastic diaphragm to sense the medium pressure, and the elastic displacement of the diaphragm controls the on-off of mechanical contacts to achieve pressure alarm. It has the characteristics of low cost, high stability and high reliability.
[0004] To achieve the above purpose, the technical solution of the utility model is as follows: a mechanical minimum pressure alarm, including a protective housing; one end of the protective housing is provided with a sealed electrical connector, and the other end is provided with a pressure inlet nozzle; wherein: a pressure-sensitive diaphragm assembly and a contact and elastic sheet assembly are respectively installed inside the protective housing; the sealed electrical connector is electrically connected to the contact and elastic sheet assembly; a damper is installed inside the pressure inlet nozzle; the pressure is transmitted to the pressure-sensitive diaphragm assembly through the damper; the pressure-sensitive diaphragm assembly generates elastic displacement with the change of the measured medium pressure, driving the conduction or disconnection of the contact and elastic sheet assembly to achieve pressure detection and alarm.
[0005] Further as an improvement of the technical solution of the utility model, the pressure-sensitive diaphragm assembly includes a corrugated diaphragm, a stud, a limit plate and a compression ring; the stud is arranged in the middle of the corrugated diaphragm; the corrugated diaphragm is built into the protective housing through the compression ring; the limit plate is arranged above the corrugated diaphragm to adapt to the deformation of the corrugated diaphragm.
[0006] Further as an improvement of the technical solution of the utility model, the contact and elastic sheet assembly includes a U-shaped movable elastic sheet, a static elastic sheet, a support column and an insulating pad; one end of the U-shaped movable elastic sheet is installed on the stud through a screw; the support column is installed on the protective housing; the static elastic sheet is installed on the support column through a lining plate; the U-shaped movable elastic sheet is insulated from the static elastic sheet through the insulating pad; a moving contact is arranged on the U-shaped movable elastic sheet; a static contact is arranged on the static elastic sheet; the moving contact and the static contact are arranged opposite to each other.
[0007] As a further improvement of the technical solution of the utility model, the damper includes a damper housing, a damper nozzle, a central hole damper baffle, a side hole damper baffle and a partition; the damper nozzle is installed at one end of the damper housing; the partition is installed at the other end of the damper housing; the central hole damper baffle and the side hole damper baffle are arranged at intervals inside the damper housing.
[0008] As a further improvement of the technical solution of the utility model, the contact and the elastic sheet assembly further include a lead wire; the U-shaped movable elastic sheet is electrically connected to the sealed electrical connector through the lead wire.
[0009] As a further improvement of the technical solution of the utility model, a reinforcing elastic sheet assembly is arranged at the top end of the U-shaped movable elastic sheet; the reinforcing elastic sheet assembly is mainly composed of two cross-shaped elastic sheets.
[0010] As a further improvement of the technical solution of the utility model, the installation plane of the static contact is higher than the installation plane of the stud.
[0011] As a further improvement of the technical solution of the utility model, the limiting plate is a stepped limiting plate; the shape of the stepped limiting plate is set according to the deformation of the corrugated diaphragm.
[0012] As a further improvement of the technical solution of the utility model, a dust-proof net is arranged on the partition.
[0013] In summary, the utility model has the following beneficial effects:
[0014] The mechanical minimum pressure alarm of the utility model uses a corrugated diaphragm as an elastic element. The corrugated diaphragm drives the U-shaped movable elastic sheet to move, and switches the on-off state with the static elastic sheet to realize the pressure alarm function. The utility model installs a damper at the pressure guiding end (pressure guiding nozzle), which can effectively reduce the damage of instantaneous high pressure and particulate impurities to the diaphragm; under high pressure conditions, the limiting plate can mechanically limit the corrugated diaphragm, effectively controlling the stress on the corrugated diaphragm in a high pressure environment and avoiding overload damage of the corrugated diaphragm in a high pressure environment; at the free end of the U-shaped movable elastic sheet, a reinforcing elastic sheet assembly is installed to avoid the formation of a cantilever structure of the movable elastic sheet and avoid false alarms caused by the vibration displacement of the U-shaped movable elastic sheet. Description of the Drawings
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0016] Figure 1Schematic diagram of the overall structure of a mechanical minimum pressure alarm in an embodiment of the present utility model;
[0017] Figure 2 Schematic diagram of the damper structure in an embodiment of the present utility model;
[0018] Figure 3 Schematic diagram of the pressure-sensitive diaphragm assembly in an embodiment of the present utility model;
[0019] Figure 4 Schematic diagram of the assembly structure of the pressure-sensitive diaphragm assembly, contact and elastic sheet assembly in an embodiment of the present utility model;
[0020] Figure 5 Schematic diagram of the structure of the reinforcing elastic sheet assembly in an embodiment of the present utility model.
[0021] Reference numerals in the accompanying drawings of the specification include: 1 - Sealed electrical connector; 2 - Protection housing; 3 - Support pillar; 4 - Reinforcing elastic sheet assembly; 5 - Contact and elastic sheet assembly; 6 - Pressure-sensitive diaphragm assembly; 7 - Damper; 8 - Pressure-introducing nozzle; 9 - Lead wire; 10 - Nut; 11 - Insulating pad; 12 - Stud; 13 - Corrugated diaphragm; 14 - Limiting plate; 15 - Pressing ring; 16 - U-shaped movable elastic sheet; 17 - Static elastic sheet; 18 - Lining plate; 19 - Second bolt; 20 - Moving contact; 21 - Static contact; 22 - Damper housing; 23 - Damper nozzle; 24 - Central hole damper baffle; 25 - Side hole damper baffle; 26 - Partition plate; 27 - Dust-proof net. Detailed implementation manners
[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0024] In the present utility model, unless otherwise clearly defined and limited, the term "connection" shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0025] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0026] The following further details the present utility model with reference to the accompanying drawings.
[0027] Refer to Figures 1 to 5 , a mechanical minimum pressure alarm, comprising a protective housing 2; one end of the protective housing 2 is provided with a sealed electrical connector 1, and the other end is provided with a pressure guiding nozzle 8; wherein: a pressure sensing diaphragm assembly 6 and a contact and spring sheet assembly 5 are respectively installed inside the protective housing 2; the sealed electrical connector 1 is electrically connected to the contact and spring sheet assembly 5; a damper 7 is installed inside the pressure guiding nozzle 8; the pressure is transmitted to the pressure sensing diaphragm assembly 6 through the damper 7; the pressure sensing diaphragm assembly 6 generates an elastic displacement with the change of the pressure of the measured medium, driving the conduction or disconnection of the contact and spring sheet assembly 5 to realize pressure detection and alarm. The pressure sensing diaphragm assembly 6 of the present utility model can generate an elastic displacement with the change of the pressure of the measured medium, and the diaphragm of the pressure sensing diaphragm assembly 6 drives the contact and spring sheet assembly 5 to realize the conduction and disconnection functions when the position changes, so as to realize the pressure point alarm function.
[0028] Specifically, in the solution of this embodiment, the pressure-sensitive diaphragm assembly 6 includes a corrugated diaphragm 13, a stud 12, a limit plate 14, and a retaining ring 15; the stud 12 is arranged in the middle of the corrugated diaphragm 13; the corrugated diaphragm 13 is built into the protective housing 2 through the retaining ring 15; the limit plate 14 is arranged above the corrugated diaphragm 13 to adapt to the deformation of the corrugated diaphragm 13. The limit plate 14 is a stepped limit plate; the shape of the stepped limit plate is set according to the deformation of the corrugated diaphragm 13; it should be noted that a stepped limit plate is designed at the upper end of the corrugated diaphragm 13, which effectively reduces the stress of the corrugated diaphragm 13 in a high-pressure environment and can effectively protect the elastic diaphragm in a high-pressure environment. The stud 12 is welded to the corrugated diaphragm 13 and moves up and down with the elastic displacement of the corrugated diaphragm 13. It should be noted that the change of the external pressure causes the corrugated diaphragm 13 to generate elastic displacement, driving the contact to conduct and disconnect with the elastic sheet assembly 5 to realize pressure detection.
[0029] Specifically, in the solution of this embodiment, the contact and elastic sheet assembly 5 includes a U-shaped movable elastic sheet 16, a static elastic sheet 17, a support column 3, and an insulating pad 11; one end of the U-shaped movable elastic sheet 16 is installed on the stud 12 through a screw; the support column 3 is installed on the protective housing 2; the static elastic sheet 17 is installed on the support column 3 through a lining plate 18; the U-shaped movable elastic sheet 16 is insulated from the static elastic sheet 17 through the insulating pad 11; a moving contact 20 is arranged on the U-shaped movable elastic sheet 16 through a second bolt 19; a static contact 21 is arranged on the static elastic sheet 17; the moving contact 20 and the static contact 21 are arranged opposite to each other. It should be noted that the U-shaped movable elastic sheet 16 is fixed on the stud 12 of the pressure-sensitive component through a screw and is insulated from the pressure-sensitive diaphragm assembly 6 through a T-shaped insulating pad and an annular insulating pad. The moving contact 20 (silver-nickel alloy contact) is welded on the U-shaped movable elastic sheet 16 and contacts and disconnects with the static contact 21 of the static elastic sheet 17 as the pressure changes.
[0030] Specifically, in the solution of this embodiment, the damper 7 includes a damper housing 22, a damper nozzle 23, a central hole damper baffle 24, a side hole damper baffle 25, and a partition plate 26; the damper nozzle 23 is installed at one end of the damper housing 22; the partition plate 26 is installed at the other end of the damper housing 22; the central hole damper baffle 24 and the side hole damper baffle 25 are arranged at intervals inside the damper housing 22. Specifically, in the solution of this embodiment, a dust-proof net 27 is arranged on the partition plate 26. It should be noted that by installing the damper 7 in the pressure guiding nozzle 8, the damper 7 adopts a multi-hole laminated structure and is installed with a dust-proof net 27, which can reduce the damage of transient overload pressure and impurity particles to the elastic diaphragm and improve the product reliability.
[0031] Specifically, in the solution of this embodiment, the contact and the elastic sheet assembly 5 further include a lead wire 9; the U-shaped movable elastic sheet 16 is electrically connected to the sealed electrical connector 1 through the lead wire 9.
[0032] Specifically, in the solution of this embodiment, a reinforcing elastic sheet assembly 4 is installed at the top end of the U-shaped movable elastic sheet 16 through a nut 10; the reinforcing elastic sheet assembly 4 is mainly composed of two cross-shaped elastic sheets. It should be noted that the top end of the movable elastic sheet is reinforced by the reinforcing elastic sheet assembly 4 to avoid false alarm phenomena caused by vibration displacement of the movable elastic sheet under impact and vibration environments.
[0033] Specifically, in the solution of this embodiment, the installation plane of the static contact 21 is higher than the installation plane of the stud 12. It should be noted that the installation plane of the static contact 21 is higher than the installation hole plane, so that there is a pre-tightening force after the static elastic sheet liner is installed, avoiding vibration of the static elastic sheet.
[0034] The mechanical minimum pressure alarm of the present utility model uses a corrugated diaphragm 13 as an elastic element. The corrugated diaphragm 13 drives the U-shaped movable elastic sheet 16 to move, switching the on-off state with the static elastic sheet to achieve the pressure alarm function. In the present utility model, a damper 7 is installed at the pressure guiding end (pressure guiding nozzle 8), which can effectively reduce the damage to the diaphragm caused by instantaneous high pressure and particulate impurities; in the high-pressure state, the limiting plate can mechanically limit the corrugated diaphragm 13, effectively controlling the stress on the corrugated diaphragm 13 in the high-pressure environment and avoiding overload damage of the corrugated diaphragm 13 in the high-pressure environment; at the free end of the U-shaped movable elastic sheet 16, a reinforcing elastic sheet assembly 4 is installed to avoid the formation of a cantilever structure of the movable elastic sheet and avoid false alarms caused by vibration displacement of the U-shaped movable elastic sheet 16.
[0035] The above are only the embodiments of the present utility model. Common general knowledge such as specific structures and characteristics known in the solution is not described in detail here. Those of ordinary skill in the art know all the common general knowledge in the technical field to which the utility model belongs before the application date or the priority date, can know all the existing technologies in this field, and have the ability to apply conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application, complete and implement this solution in combination with their own abilities. Some typical well-known structures or well-known methods should not become an obstacle for those of ordinary skill in the art to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.
Claims
1. A mechanical minimum pressure alarm, comprising a protective housing; one end of the protective housing is provided with a sealed electrical connector, and the other end is provided with a pressure guiding nozzle; characterized in that: A pressure-sensitive diaphragm assembly and a contact and elastic sheet assembly are respectively installed inside the protective housing; the sealed electrical connector is electrically connected to the contact and elastic sheet assembly; a damper is installed inside the pressure guiding nozzle; the pressure is transmitted to the pressure-sensitive diaphragm assembly through the damper; the pressure-sensitive diaphragm assembly generates elastic displacement with the change of the pressure of the measured medium, driving the conduction or disconnection of the contact and elastic sheet assembly to realize pressure detection and alarm.
2. The mechanical minimum pressure alarm according to claim 1, characterized in that: The pressure-sensitive diaphragm assembly includes a corrugated diaphragm, a stud, a limiting plate and a pressing ring; the stud is arranged in the middle of the corrugated diaphragm; the corrugated diaphragm is built into the protective housing through the pressing ring; the limiting plate is arranged above the corrugated diaphragm to adapt to the deformation of the corrugated diaphragm.
3. The mechanical minimum pressure alarm according to claim 2, characterized in that: The contact and elastic sheet assembly includes a U-shaped movable elastic sheet, a static elastic sheet, a support column and an insulating pad; one end of the U-shaped movable elastic sheet is installed on the stud through a screw; the support column is installed on the protective housing; the static elastic sheet is installed on the support column through a lining plate; the U-shaped movable elastic sheet is insulated from the static elastic sheet through the insulating pad; a moving contact is arranged on the U-shaped movable elastic sheet; a static contact is arranged on the static elastic sheet; the moving contact and the static contact are arranged opposite to each other.
4. A mechanical minimum pressure alarm according to claim 1, characterized in that: The damper includes a damper housing, a damper nozzle, a central hole damper baffle, a side hole damper baffle and a partition plate; the damper nozzle is installed at one end of the damper housing; the partition plate is installed at the other end of the damper housing; the central hole damper baffle and the side hole damper baffle are arranged at intervals inside the damper housing.
5. A mechanical minimum pressure alarm according to claim 3, characterized in that: The contact and elastic sheet assembly further includes a lead wire; the U-shaped movable elastic sheet is electrically connected to the sealed electrical connector through the lead wire.
6. The mechanical minimum pressure alarm according to claim 3, characterized in that: A reinforcing elastic sheet assembly is arranged at the top end of the U-shaped movable elastic sheet; the reinforcing elastic sheet assembly is mainly composed of two cross-shaped elastic sheets.
7. A mechanical minimum pressure alarm according to claim 6, characterized in that: The installation plane of the static contact is higher than the installation plane of the stud.
8. The mechanical minimum pressure alarm according to claim 7, wherein: The limiting plate is a stepped limiting plate; the shape of the stepped limiting plate is set according to the deformation of the corrugated diaphragm.
9. A mechanical minimum pressure alarm according to claim 4, characterized in that: A dust-proof net is arranged on the partition plate.