CN212779713U

CN212779713U - Differential pressure signal device

Info

Publication number: CN212779713U
Application number: CN202022201585.7U
Authority: CN
Inventors: 刘红梅; 刘志涛; 白琳
Original assignee: Sichuan Xinchuan Aviation Instrument Co ltd
Current assignee: Sichuan Xinchuan Aviation Instrument Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-03-23
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a pressure difference signal ware, including casing and the valve subassembly of slidable mounting in the casing, the valve subassembly can form high-pressure chamber and low pressure chamber with the casing is sealed and in sealing position both sides, the valve subassembly is located the inherent permanent magnet of one end in high-pressure chamber, slidable mounting has the signal cap isolated with high-pressure chamber and is provided with the first elastic component that is used for outwards releasing the signal cap with signal cap complex on the casing, the signal cap has the magnetic part that is used for with the permanent magnet actuation with the one end that the permanent magnet is relative, and the valve subassembly produces the displacement to the low pressure side and removes the actuation of permanent magnet and magnetic part when the pressure differential in high-pressure chamber and low pressure chamber reaches the default. Use the utility model provides a pressure differential signaling device, when pressing the difference, through popping out of signal cap in order to carry out mechanical warning, mechanical structure is reliable and stable, has avoided the warning ageing that the signal indication lamp damage arouses, has improved pressure differential signaling device's reliability.

Description

Differential pressure signal device

Technical Field

The utility model relates to a sensor technical field, more specifically say, relate to a pressure differential signaling ware.

Background

After the fuel filter is used for a period of time, the filtered impurities are gradually accumulated and attached to the surface of the filter element, so that the resistance of the filter element is increased, if the filter element cannot be replaced or cleaned in time, the power of an engine is reduced, and the engine cannot be normally used seriously. However, the period of replacing or cleaning the fuel filter mainly depends on subjective judgment of a user, and the filter element is replaced or cleaned regularly according to experience, so that the blockage condition of the fuel filter element cannot be accurately judged, and two conditions can be caused: firstly, the filter element is replaced in advance without reaching the service life, thereby causing unnecessary waste; secondly, the filter element reaches the service life and is not replaced in time, so that the normal work of the engine is influenced. Therefore, the blockage condition of the filter element of the filter is judged by using a mechanical differential pressure sensor at present according to the differential pressure of the oil inlet end and the oil outlet end of the filter.

A common differential pressure sensor generally adopts a mechanical valve component type structure to sense pressure, and when the differential pressure is lower than an indicated value, a differential pressure annunciator is not started; when the pressure difference reaches or is higher than the indicated value, the pressure difference annunciator is started, the micro switch is switched on, and the signal indicator lamp is switched on to warn that the pressure difference is too high. However, the signal indicator light may be damaged, which results in low reliability of the differential pressure annunciator, and if the technician fails to notice the warning signal in time, it is easy to cause the related equipment in the high-pressure chamber to be damaged under high pressure.

In summary, how to effectively solve the problems that the differential pressure sensor adopts the signal indicating lamp to indicate that the differential pressure is too high, the reliability is low, and the like, is a problem to be solved by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a differential pressure annunciator, the structural design of which can effectively solve the problem that the differential pressure sensor adopts the signal indicating lamp to indicate the lower reliability of the over-high differential pressure.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a pressure difference signal ware, including casing and slidable mounting in valve subassembly in the casing, valve subassembly can with the casing is sealed and forms high-pressure chamber and low pressure chamber in sealed position both sides, valve subassembly is located the inherent permanent magnet of one end in high-pressure chamber, slidable mounting on the casing have with isolated signal cap in high-pressure chamber and with signal cap complex be provided with be used for with the outside first elastic component who releases of signal cap, the signal cap with the relative one end of permanent magnet have be used for with the magnetic part of permanent magnet actuation, just valve subassembly is in the high-pressure chamber with produce the displacement to the low pressure side and remove when the pressure differential in low pressure chamber reaches the default the permanent magnet with the actuation of magnetic part.

Preferably, in the above differential pressure annunciator, the permanent magnet is magnetic steel.

Preferably, in the above differential pressure annunciator, the magnetic member is a magnetizer.

Preferably, in the above differential pressure annunciator, a stopper sleeve is fixed in the casing in front of the magnetizer and the permanent magnet, and the stopper sleeve has magnetic permeability.

Preferably, in the above differential pressure annunciator, the housing is provided with an installation through hole, a baffle is fixed in the installation through hole, the signal cap is slidably installed in the baffle, and the inner end of the signal cap is provided with a boss capable of abutting against the baffle to limit the maximum outward movement distance of the signal cap.

Preferably, in the differential pressure annunciator, a first retainer ring is fixed in the housing, and the baffle abuts against the first retainer ring.

Preferably, in the above differential pressure annunciator, the inner wall of the housing includes a circle of circular table surface, the diameter of the circular table surface is gradually increased from the high pressure side to the low pressure side, one end of the valve assembly abuts against the circular table surface to seal with the housing, and the valve assembly generates displacement to the low pressure side when the differential pressure between the high pressure chamber and the low pressure chamber reaches a preset value, and communicates the high pressure chamber with the low pressure chamber.

Preferably, in the differential pressure annunciator, a blocking cover is fixed in the housing, and a second elastic member for pushing the shutter assembly to move to the high-pressure side is arranged between the blocking cover and the shutter assembly.

Preferably, in the above differential pressure annunciator, a second collar is fixed in the housing, and the blocking cover abuts against the second collar to be limited in the housing

The utility model provides a pressure differential signaling device includes casing, valve assembly, signal cap and first elastic component. The valve assembly is arranged in the shell in a sliding mode, can be sealed with the shell, and forms a high-pressure cavity and a low-pressure cavity on two sides of the sealed position; the permanent magnet is fixed at one end of the valve assembly, which is positioned in the high-pressure cavity, the signal cap is slidably arranged on the shell and isolated from the high-pressure cavity, and the first elastic piece is matched with the signal cap and used for pushing the signal cap outwards; the end of the signal cap opposite to the permanent magnet is provided with a magnetic part for attracting the permanent magnet, and the valve component generates displacement to the low-pressure side when the pressure difference between the high-pressure cavity and the low-pressure cavity reaches a preset value and removes the attraction between the permanent magnet and the magnetic part.

Use the utility model provides a pressure difference signal ware, the signal cap passes through the magnetic part and cooperates with the permanent magnet on the valve subassembly. When the pressure difference between the high-pressure cavity and the low-pressure cavity does not reach a preset value, the valve assembly is located at the attraction position of the permanent magnet and the magnetic part, so that the signal cap can be attracted to the retraction position magnetically. When the pressure difference between the high-pressure cavity and the low-pressure cavity reaches a preset value, the valve assembly generates displacement towards the low-pressure side, the attraction of the permanent magnet to the magnetic part is released, and the signal cap is pushed out under the action of the first elastic part, so that the purpose of mechanical alarm indication is achieved. In conclusion, the pressure difference annunciator that this application provided, when pressing the difference, through popping up of signal cap in order to carry out mechanical warning, mechanical structure is reliable and stable, has avoided the warning ageing that the signal indicator damaged and arouse, has improved pressure difference annunciator's reliability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a differential pressure annunciator according to an embodiment of the present invention.

The drawings are numbered as follows:

1. a housing; 2. a second collar; 3. a blocking cover; 4. a second elastic member; 5. a shutter assembly; 6. a seal ring; 7. a first collar; 8. a baffle plate; 9. a signal cap; 10. a first elastic member; 11. a stop sleeve; 12. adjusting the gasket; 13. a circular table top; A. a high pressure chamber; B. a low pressure chamber.

Detailed Description

The embodiment of the utility model discloses pressure difference signaling device to improve the reliability of warning.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a differential pressure annunciator according to an embodiment of the present invention.

In one embodiment, the present invention provides a differential pressure annunciator including a housing 1, a shutter assembly 5, a signal cap 9, and a first resilient member 10.

Wherein, the valve assembly 5 is slidably mounted in the housing 1, and can be sealed with the housing 1 and form a high pressure chamber a and a low pressure chamber B at two sides of the sealed position. That is, the valve assembly 5 is used to form a high pressure chamber a and a low pressure chamber B inside the product, and specifically, the opening may be formed in the housing 1 to communicate the high pressure chamber a with the high pressure of the environment and communicate the low pressure chamber B with the low pressure of the environment. The sealing manner of the shutter assembly 5 with the inner wall of the housing 1 is not limited herein.

The shutter assembly 5 is slidably mounted within the housing 1 so that it can move along the housing 1 under the pressure differential between the high pressure chamber a and the low pressure chamber B. That is, when the pressure difference between the high pressure chamber a and the low pressure chamber B does not reach the preset value, the valve assembly 5 is located at the first position, such as the corresponding left end position in fig. 1, and when the pressure difference between the high pressure chamber a and the low pressure chamber B reaches the preset value, such as the pressure difference annunciator is used in cooperation with the oil filter of the hydraulic system, for under the condition of indication of filter element blockage, when the pressure difference between the oil filter high pressure chamber a and the low pressure chamber B reaches the preset value, the valve assembly 5 can move from the high pressure side to the low pressure side, such as moving to the right by a certain distance as shown in fig. 1. It should be noted that the high pressure side and the low pressure side referred to herein and hereinafter refer to the directions of high pressure and low pressure in correspondence with the high pressure chamber a and the low pressure chamber B.

The signal cap 9 is slidably mounted on the housing 1 and is isolated from the high pressure chamber a. The signal cap 9 is isolated from the high pressure chamber a, specifically, by the housing 1, or by providing a sealing member or structure. The signal cap 9 is slidably mounted on the housing 1, which means that it can move linearly relative to the housing 1 and cannot be removed from the housing 1.

The permanent magnet is fixed at one end of the valve component 5, which is positioned in the high-pressure cavity A, a magnetic part used for attracting the permanent magnet is arranged at one end, which is opposite to the permanent magnet, of the signal cap 9, and the first elastic part 10 is matched with the signal cap 9 and used for pushing the signal cap 9 outwards. Specifically, when the pressure difference between the high pressure chamber a and the low pressure chamber B does not reach the preset value, the valve assembly 5 is located at a position where the permanent magnet and the magnetic member attract each other, and when the pressure difference between the high pressure chamber a and the low pressure chamber B reaches the preset value, the valve assembly 5 generates displacement towards the low pressure side to remove the magnetic attraction effect of the permanent magnet and the magnetic member, and then the signal cap 9 is pushed out under the action of the first elastic member 10. It should be noted that, when the pressure difference between the high pressure chamber a and the low pressure chamber B does not reach the preset value, the valve assembly 5 is located at the attraction position of the permanent magnet and the magnetic member, and the signal cap 9 can be reset by pressing the signal cap 9 through an external force and the permanent magnet and the magnetic member are attracted, so that the signal cap 9 keeps the reset retraction state under the action of the magnetic attraction. The first elastic member 10 may be embodied as a spring, such as a compression spring, which compresses the first elastic member 10 when the signal cap 9 is in the retracted state. Of course, the restoring force of the first elastic member 10 should be smaller than the magnetic attraction between the permanent magnet and the magnetic member to ensure that the signal cap 9 is kept in the reset fixing state under the magnetic attraction.

A sealing ring 6 can be arranged outside the shell 1 to realize the sealing installation of the differential pressure annunciator.

Use the utility model provides a pressure difference signal ware, signal cap 9 passes through the magnetic part and cooperates with the permanent magnet on the valve subassembly 5. When the pressure difference between the high pressure chamber A and the low pressure chamber B does not reach the preset value, the valve component 5 is positioned at the attraction position of the permanent magnet and the magnetic part, so that the signal cap 9 can be magnetically attracted to the retraction position. When the pressure difference between the high-pressure cavity A and the low-pressure cavity B reaches a preset value, the valve component 5 generates displacement towards the low-pressure side, the attraction of the permanent magnet to the magnetic part is released, and the signal cap 9 is pushed out under the action of the first elastic part 10, so that the purpose of mechanical alarm indication is achieved. In conclusion, the pressure difference annunciator provided by the application is used for mechanically warning through popping up the signal cap 9 when the pressure difference exists, is stable and reliable in mechanical structure, avoids warning aging caused by damage of the signal indicating lamp and improves the reliability of the pressure difference annunciator.

Specifically, the permanent magnet is magnetic steel. The magnetic steel has good mechanical property and magnetism, can ensure reliable attraction with the magnetic part, has high hardness and is not easy to damage. Other conventional materials may be used for the permanent magnets as desired. The magnetic part is specifically a magnetizer, such as an iron part and the like, and can be magnetized under the action of the permanent magnet so as to attract the permanent magnet due to the magnetic permeability. Of course, the magnetic member may be a permanent magnet capable of attracting the permanent magnet on the shutter assembly 5 as required.

Further, a stopping sleeve 11 is fixed between the magnetizer and the permanent magnet in the casing 1, and the stopping sleeve 11 has magnetic permeability. The stopping sleeve 11 has magnetic permeability, so the magnetic part can be magnetized under the action of the permanent magnet, and the permanent magnet attracts the magnetic part on the signal cap 9 through the stopping sleeve 11. Meanwhile, the stop sleeve 11 can play a limiting role, and the permanent magnet is prevented from directly contacting and colliding with the signal cap 9.

Specifically, a mounting through hole is formed in the shell 1, a baffle plate 8 is fixed in the mounting through hole, the signal cap 9 is slidably mounted in the baffle plate 8, and a boss capable of abutting against the baffle plate 8 to limit the maximum outward movement distance of the signal cap 9 is arranged at the inner end of the signal cap 9. The maximum outward moving distance of the signal cap 9 is limited by the arrangement of the baffle plate 8 and the boss, so that the signal cap 9 is prevented from being separated from the shell 1. According to the needs, the signal cap 9 can be installed in a sliding mode and not detached through the structure of the shell 1 and the structure of the signal cap 9. That is, through setting up baffle 8 with installation signal cap 9, the product equipment of being convenient for, the shape of specific baffle 8 sets up according to the appearance of installation through-hole and signal cap 9 correspondingly, and here is no longer repeated.

Furthermore, a first clamping ring 7 is fixedly arranged on the inner wall of the shell 1, and the baffle plate 8 is abutted against the first clamping ring 7. The installation of the baffle 8 is facilitated by the arrangement of the first collar 7. Baffle 8 may also snap directly into housing 1 or may be otherwise fixedly secured as desired.

On the basis of the above embodiments, the inner wall of the casing 1 includes a circle of round table surface 13, the diameter of the round table surface 13 is gradually increased from the high pressure side to the low pressure side, one end of the valve assembly 5 abuts against the round table surface 13 to be sealed with the casing 1, and the valve assembly 5 generates displacement to the low pressure side when the pressure difference between the high pressure chamber a and the low pressure chamber B reaches a preset value, and communicates the high pressure chamber a and the low pressure chamber B. The circular table surface 13, i.e. the partial conical surface, is inclined as shown in fig. 1, and the diameter gradually increases from the high pressure side to the low pressure side, so that the abutting position of the shutter assembly 5 and the housing 1 is inclined. That is, when the pressure difference between the high pressure chamber a and the low pressure chamber B does not reach the preset value, one end of the valve assembly 5 abuts against the circular table surface 13 to be sealed with the housing 1, and the high pressure chamber a and the low pressure chamber B are isolated. And when the pressure differential of high-pressure chamber A and low pressure chamber B reached the default, valve subassembly 5 moved to the low pressure side under the effect of pressure differential, namely to the side of keeping away from signal cap 9 and remove, because the shape of mesa 13, then valve subassembly 5 no longer offsets with it, valve subassembly 5 has constituted bypass valve, the switching on of high-pressure chamber A with low pressure chamber B has been realized, thereby when the filter core of filter blockked, both can remind through the signal cap, can realize switching on of high-pressure chamber A with low pressure chamber B through the aforesaid setting simultaneously, equipment damage in the high-pressure chamber A has been prevented effectively.

In the above embodiments, the housing 1 is fixed with the blocking cover 3, and the second elastic member 4 for pushing the shutter assembly 5 to move to the high pressure side is disposed between the blocking cover 3 and the shutter assembly 5. The second elastic member 4 may be a spring, such as a compression spring having two ends respectively abutting against the blocking cover 3 and the shutter assembly 5, or other parts capable of providing a damping force. By the arrangement of the second elastic member 4, the second elastic member 4 is deformed by acting on the shutter assembly 5 when it moves, and thus the elastic force of the second elastic member 4 is overcome. When the pressure difference between the high pressure chamber A and the low pressure chamber B is larger than the acting force of the second elastic member 4, the valve assembly 5 is pushed to move. The event sets up the steerable default that promotes valve assembly 5 and remove corresponding pressure differential through the pretightning force size of second elastic component 4, namely sets up the regulation that realizes the pressure value of warning through the pretightning force size of second elastic component 4. The pretightening force of the second elastic element 4 can be controlled by the structure of the second elastic element 4. According to the requirement, the adjusting gasket 12 can be squeezed between the second elastic member 4 and the shutter assembly 5 so as to adjust the pretightening force of the second elastic member 4.

Because the pretightening force of the second elastic part 4 is generally far greater than the acting force of the permanent magnet and the magnetic part, the influence of the acting force of the permanent magnet and the magnetic part on the preset value of the pressure difference can be ignored. Of course, the influence of the acting force of the permanent magnet and the magnetic part can be introduced into the control of the preset value in a debugging mode and the like. The second elastic member 4 may not be provided according to the setting of a specific pressure difference preset value.

In order to facilitate the installation of the blocking cover 3, a second clamping ring 2 is fixed in the housing 1, and the blocking cover 3 is abutted against the second clamping ring 2 to be limited in the housing 1. If necessary, the second elastic member 4 may be attached by the shape of the housing 1 itself, but the second retainer 2 and the shield cover 3 are inconvenient to assemble.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a pressure difference signal ware, its characterized in that, including casing and slidable mounting in valve subassembly in the casing, valve subassembly can with the casing is sealed and forms high-pressure chamber and low pressure chamber in sealed position both sides, valve subassembly is located the inherent permanent magnet of one end in high-pressure chamber, slidable mounting on the casing with isolated signal cap in high-pressure chamber and with signal cap complex be provided with be used for with the outside first elastic component who releases of signal cap, the signal cap with the one end that the permanent magnet is relative have be used for with the magnetic part of permanent magnet actuation, just valve subassembly is in the high-pressure chamber with produce the displacement to the low pressure side and remove when the pressure differential in low-pressure chamber reaches the default the permanent magnet with the actuation of magnetic part.

2. The differential pressure annunciator of claim 1, wherein the permanent magnet is magnetic steel.

3. A differential pressure signaler according to claim 1, wherein the magnetic member is a magnetizer.

4. The differential pressure annunciator of claim 3, wherein a stop sleeve is fixed within the housing between the magnetizer and the permanent magnet, and the stop sleeve has magnetic permeability.

5. The differential pressure annunciator of claim 1, wherein the housing defines a mounting through hole, a baffle is fixed in the mounting through hole, the signal cap is slidably mounted in the baffle, and a boss is provided at an inner end of the signal cap and capable of abutting against the baffle to limit a maximum outward movement distance of the signal cap.

6. A differential pressure signaler as claimed in claim 5 wherein a first collar is secured within the housing, the blocking plate abutting the first collar.

7. The differential pressure annunciator of any one of claims 1 to 5, wherein the inner wall of the housing comprises a circle of round table surface, the diameter of the round table surface is gradually increased from a high pressure side to a low pressure side, one end of the valve assembly abuts against the round table surface to seal the housing, and the valve assembly generates displacement to the low pressure side when the differential pressure between the high pressure chamber and the low pressure chamber reaches a preset value and communicates the high pressure chamber with the low pressure chamber.

8. A differential pressure signaler according to any one of claims 1 to 5, wherein a cover is fixed in the housing, and a second elastic member for urging the shutter assembly to move to a high pressure side is provided between the cover and the shutter assembly.

9. A differential pressure signaler as claimed in claim 8 wherein a second collar is secured within the housing, the cover abutting the second collar to be retained within the housing.