Differential pressure alarm

Abstract

The utility model relates to the field of alarm devices, in particular to a differential pressure alarm which comprises a shell, a partition is arranged in the shell and divides the space in the shell into a first cavity and a second cavity, liquid is arranged in the first cavity and the second cavity, a one-way valve is arranged on the partition in a penetrating mode, and a pressure sensor is arranged on the one-way valve. The one-way valve only allows liquid to enter the second cavity from the first cavity, the shell is further provided with an air inlet and a control valve in a penetrating mode, the air inlet is communicated with the first cavity and the outside, one end of the control valve is communicated with the first cavity, the other end of the control valve is communicated with the second cavity, and a pressure sensor is arranged in the second cavity. By arranging the first cavity, the second cavity, the one-way valve and the control valve, the air pressure in the second cavity cannot be autonomously reduced, so that when the air pressure fluctuates, once the air pressure exceeds a specified value, the buzzer can continuously give an alarm, and the situation that a worker cannot notice the alarm is avoided.

Description

Technical Field

[0001] The utility model relates to the field of alarm devices, in particular to a pressure difference alarm. Background Art

[0002] The differential pressure alarm is a device used in industrial production. It is used to monitor the pressure difference or change inside a machine or at a specific location, and sound an alarm when it exceeds the preset safety range, thereby ensuring the normal operation of the machine.

[0003] At present, the gas pressure differential alarm is generally realized by installing a pressure differential switch or a pressure sensor, and then assembling a pressure differential instrument or connecting an alarm light. The pressure differential alarm device will alarm after receiving a pressure differential exceeding the specified value. However, since the pressure differential may change, the alarm device will stop alarming after the pressure differential is restored, so the operator may not notice the alarm; the alarm device may also alarm frequently when the pressure fluctuates, interfering with the operator's judgment. Therefore, it is necessary for us to improve such a structure to overcome the above defects. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a pressure difference alarm, which is achieved through the following technical solutions:

[0005] A pressure difference alarm comprises a shell, wherein a partition is arranged inside the shell, wherein the partition divides the space inside the shell into a first cavity and a second cavity, wherein both the first cavity and the second cavity are provided with liquid, and a one-way valve is arranged through the partition, wherein the one-way valve can only allow liquid to enter the second cavity from the first cavity, and an air inlet and a control valve are also arranged through the shell, wherein the air inlet connects the first cavity and the outside, one end of the control valve is connected to the first cavity, and the other end is connected to the second cavity, and a pressure sensor is arranged in the second cavity.

[0006] In the above technical scheme: the shell is used to set up the remaining structures and components; the partition is used to separate the first cavity from the second cavity; the one-way valve is used to allow the liquid in the first cavity to enter the second cavity when the air pressure in the first cavity increases, and will not flow back, so that the air pressure in the second cavity increases to be consistent with that in the second cavity; the air inlet is used to connect the first cavity with the position to be detected so that the air pressure of the two is consistent; the control valve is used to release the pressure in the second cavity to release the alarm, and the alarm mode of the pressure sensor can be changed by controlling the opening and closing of the valve. When the valve is closed, once the air pressure exceeds the specified value, the air pressure in the second cavity will not decrease, so the alarm can continue. When the valve is opened, the first cavity and the second cavity are connected, the one-way valve does not take effect, and the alarm will stop after the air pressure is restored; the pressure sensor is used to sense the air pressure and output an electrical signal.

[0007] A further setting of the present utility model is that the outer shell includes a housing and a cover, and the cover covers above the housing, so that the first cavity and the second cavity are enclosed.

[0008] In the above technical solution, the arrangement of the housing and the cover facilitates the setting of various mechanisms on the inner wall of the outer shell and the setting of liquid into the first cavity and the second cavity.

[0009] A further setting of the present utility model is that the pressure sensor is fixedly arranged on the cover, and the position of the pressure sensor corresponds to the position of the second cavity.

[0010] In the above technical solution, the pressure sensor is fixed on the cover to avoid contact between the liquid and the pressure sensor to the greatest extent; the position of the pressure sensor corresponds to the position of the second cavity, so that when the cover and the housing are assembled, the pressure sensor can be located in the second cavity.

[0011] A further setting of the present utility model is that an installation groove is provided on the housing, a sealing ring is arranged in the installation groove, and the sealing ring also keeps in contact with the cover.

[0012] In the above technical solution, the installation groove is used for arranging the sealing ring; the sealing ring is used to ensure the sealing performance of the first cavity and the second cavity.

[0013] A further setting of the present utility model is that it further includes a buzzer and a control main board, the control main board is electrically connected to the pressure sensor, and the control main board is also electrically connected to the buzzer.

[0014] In the above technical solution, the control main board is used to receive the electrical signal sent by the pressure sensor, process it, and then control the opening or closing of the buzzer; the buzzer is used to emit an alarm sound.

[0015] The present utility model discloses a differential pressure alarm. Compared with the prior art:

[0016] 1. By setting the first cavity, the second cavity, the one-way valve and the control valve, the air pressure in the second cavity will not decrease autonomously, so that when the air pressure fluctuates, once the air pressure exceeds the specified value, the buzzer can continuously alarm to avoid the situation that the staff fails to notice the alarm.

[0017] 2. The present utility model can also be adjusted to the mode of alarming when the air pressure exceeds the specified value and stopping alarming after returning to the normal value by keeping the control valve open. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a sectional view of the present utility model;

[0019] Figure 2 Schematic diagram of the interior of the housing of the present utility model.

[0020] The corresponding component names represented by the numbers and letters in the figure: 10 - housing; 101 - housing body; 101a - mounting groove; 102 - cover body; 103 - partition; 104 - first cavity; 105 - second cavity; 20 - one-way valve; 30 - air inlet; 40 - control valve; 50 - pressure sensor; 60 - sealing ring. Detailed implementation manners

[0021] The embodiments of the present utility model will be described in detail below. These embodiments are implemented on the premise of the technical solution of the present utility model, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present utility model is not limited to the following embodiments.

[0022] As Figure 1-2 shown, a differential pressure alarm proposed by the present utility model includes a housing 10. A partition 103 is provided inside the housing 10. The partition 103 divides the space inside the housing 10 into a first cavity 104 and a second cavity 105. Liquids are provided in both the first cavity 104 and the second cavity 105. A one-way valve 20 is provided through the partition 103. The one-way valve 20 only allows the liquid to enter the second cavity 105 from the first cavity 104. An air inlet 30 and a control valve 40 are also provided through the housing 10. The air inlet 30 communicates the first cavity 104 with the outside. One end of the control valve 40 communicates with the first cavity 104, and the other end communicates with the second cavity 105. A pressure sensor 50 is provided in the second cavity 105. Among them, the first cavity 104 includes a gas storage part and a connection part. The connection part is symmetrically arranged with the second cavity 105. The connection part connects the gas storage part and the second cavity 105. Preferably, the cross-sectional area of the gas storage part is the same as the cross-sectional area of the second cavity 105; the air inlet 30 does not contact the liquid in the first cavity 104.

[0023] As Figure 1-2 shown, a differential pressure alarm proposed by the present utility model, the housing 10 includes a housing body 101 and a cover body 102. The cover body 102 covers above the housing body 101, so that the first cavity 104 and the second cavity 105 are enclosed.

[0024] As Figure 1-2 shown, a differential pressure alarm proposed by the present utility model, the pressure sensor 50 is fixedly arranged on the cover body 102, and the position of the pressure sensor 50 corresponds to the position of the second cavity 105.

[0025] As Figure 1-2As shown in the figure, a differential pressure alarm proposed by the present utility model. An installation groove 101a is provided on the housing 101, and a sealing ring 60 is arranged in the installation groove 101a. The sealing ring 60 also remains in contact with the cover 102. Among them, the height of the sealing ring 60 is slightly greater than the depth of the installation groove 101a.

[0026] As Figure 1-2 shown in the figure, a differential pressure alarm proposed by the present utility model further includes a buzzer and a control main board. The control main board is electrically connected to the pressure sensor 50, and the control main board is also electrically connected to the buzzer. Among them, the buzzer can also be replaced with other sound and light alarm components.

[0027] The working principle of the present utility model is as follows:

[0028] a) When the air pressure at the monitored position rises;

[0029] b) The air pressure in the first cavity connected to this position rises accordingly;

[0030] c) Part of the liquid in the first cavity is compressed and enters the second cavity through the one-way valve;

[0031] d) The liquid in the second cavity increases and the air pressure rises;

[0032] e) The pressure sensor senses the pressure and emits an electrical signal;

[0033] f) The control main board analyzes the signal and then activates the buzzer;

[0034] g) The buzzer alarms;

[0035] h) After contacting the air pressure problem at the monitored position, open the control valve so that the air pressure in the second cavity is restored; i) Stop the alarm.

[0036] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and all should be covered within the protection scope of the present utility model.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

Claims

1. A differential pressure alarm, characterized in that: The invention comprises a housing (10), wherein a partition (103) is arranged inside the housing (10), wherein the partition (103) divides the space inside the housing (10) into a first cavity (104) and a second cavity (105), wherein both the first cavity (104) and the second cavity (105) are provided with liquid, wherein a one-way valve (20) is arranged through the partition (103), wherein the one-way valve (20) can only allow liquid to enter the second cavity (105) from the first cavity (104), and wherein an air inlet (30) and a control valve (40) are also arranged through the housing (10), wherein the air inlet (30) connects the first cavity (104) and the outside, wherein one end of the control valve (40) is connected to the first cavity (104), and the other end is connected to the second cavity (105), and wherein a pressure sensor (50) is arranged in the second cavity (105).

2. A differential pressure alarm according to claim 1, characterized in that: The housing (10) comprises a shell (101) and a cover (102); the cover (102) covers the shell (101), so that the first cavity (104) and the second cavity (105) are closed.

3. A differential pressure alarm according to claim 2, characterized in that: The pressure sensor (50) is fixedly arranged on the cover body (102), and the position of the pressure sensor (50) corresponds to the position of the second cavity (105).

4. A differential pressure alarm according to claim 3, characterized in that: The housing (101) is provided with a mounting groove (101a), a sealing ring (60) is provided in the mounting groove (101a), and the sealing ring (60) is also in contact with the cover body (102).

5. A differential pressure alarm according to claim 4, characterized in that: It also includes a buzzer and a control mainboard, wherein the control mainboard is electrically connected to the pressure sensor (50), and the control mainboard is also electrically connected to the buzzer.

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