CN219932366U - Hydraulic pump for calibration with pressure release early warning - Google Patents
Hydraulic pump for calibration with pressure release early warning Download PDFInfo
- Publication number
- CN219932366U CN219932366U CN202320790156.9U CN202320790156U CN219932366U CN 219932366 U CN219932366 U CN 219932366U CN 202320790156 U CN202320790156 U CN 202320790156U CN 219932366 U CN219932366 U CN 219932366U
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- Prior art keywords
- pressure
- calibration
- early warning
- hydraulic pump
- audible
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- 230000000007 visual effect Effects 0.000 claims abstract description 17
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000012795 verification Methods 0.000 abstract description 5
- 208000027418 Wounds and injury Diseases 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 3
- 208000014674 injury Diseases 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
A hydraulic pump for calibration with pressure relief early warning. For the high-pressure liquid pressure pump for verification, because the pressure is high, if the equipment is dismantled when the pressure is not relieved due to careless errors in verification work, personal injury can be caused, and a jet of high-pressure liquid directly penetrates through a human body, so that accidents occur. The composition of the utility model comprises: the lithium battery comprises a pressure cavity (11) and a hand pump (6), wherein two sides of the top surface of the pressure cavity are respectively fixed with a sensor (3), the side surface of the pressure cavity is fixed with a pressure switch (1), and the bottom surface of the pressure cavity is fixed with an audible and visual alarm (9) and a lithium battery (10); and after being connected in parallel, the normally open nodes of the two sensors are connected with the normally open node of the pressure switch in series and then are connected to a power supply circuit of the audible and visual alarm. The pressure relief early warning device is used for pressure relief early warning of the hydraulic pump for calibration.
Description
Technical Field
The utility model relates to a hydraulic pump for calibration with pressure relief early warning.
Background
With the development of society, pressure transmitters, pressure gauges, pressure controllers and other devices are increased in industrial production, so that the metering verification and calibration work is more and more complicated. For the high-pressure liquid pressure pump for verification, because the pressure is high, if the equipment is dismantled when the pressure is not relieved due to careless errors in verification work, personal injury can be caused, and a jet of high-pressure liquid directly penetrates through a human body, so that accidents occur.
Disclosure of Invention
The utility model aims to provide a hydraulic pump for calibration with pressure relief early warning.
The above object is achieved by the following technical scheme:
a hydraulic pump for calibration with pressure relief early warning, its composition includes: the device comprises a pressure cavity and a hand pump, wherein sensors are respectively fixed on two sides of the top surface of the pressure cavity, a pressure switch is fixed on the side surface of the pressure cavity, and an audible and visual alarm, a driver and a lithium battery are fixed on the bottom surface of the pressure cavity;
and the normally open contacts of the two sensors are connected in parallel and then connected with the normally open contact of the pressure switch in series on a power supply circuit of the audible and visual alarm.
The hydraulic pump for calibration with pressure relief early warning function is characterized in that the sensor is an infrared photoelectric switch sensor.
Advantageous effects
1. According to the utility model, the sensor is arranged, when the standard device is put on the hand and the joint of the detected equipment needs to be disassembled, the sensor is connected due to the shielding of the hand, a group of connected electrical contact signals are sent out, meanwhile, the pressure switch detects the liquid pressure in the pressure cavity, the pressure switch is connected to the audible and visual alarm device through a lead, when the pressure detected by the pressure switch is higher than the pressure node, a contact is sent out, and the contact signals and the sensor contact signals are connected in series to the audible and visual alarm device to give an alarm to prevent an operator from disassembling at the moment.
2. The utility model can prevent the standard device and the inspected equipment from being removed without pressure release during inspection, and prevent personal injury caused by the removal without pressure release.
Drawings
FIG. 1 is a top view of the present utility model;
FIG. 2 is a bottom view of the present utility model;
FIG. 3 is a circuit diagram of the present utility model;
FIG. 4 is a circuit diagram of a left sensor;
FIG. 5 is a circuit diagram of the right sensor;
in the figure: 1. a pressure switch; 2. a calibrated meter interface; 3. a sensor; 4. a standard table interface; 5. a pressure release valve; 6. a hand pump; 7. a liquid storage cup; 8. adding and reducing a pressure fine tuning pump; 9. an audible and visual alarm; 10. a lithium battery; 11. a pressure chamber.
Detailed Description
A hydraulic pump for calibration with pressure relief early warning, its composition includes: the pressure sensor comprises a pressure cavity 11 and a hand pump 6, wherein the two sides of the top surface of the pressure cavity are respectively fixed with a sensor 3, the side surface of the pressure cavity is fixed with a pressure switch 1, and the bottom surface of the pressure cavity is fixed with an audible and visual alarm 9 and a lithium battery 10;
and the normally open contacts of the two sensors are connected in parallel and then connected with the normally open contact of the pressure switch in series on a power supply circuit of the audible and visual alarm.
The circuit diagram of the alarm is shown in fig. 3, the circuit diagrams of the two sensors are respectively shown in fig. 4 and 5, SG in the diagram is an audible and visual alarm, YL is a normally open contact of a pressure switch, J1 and J2 are 12V direct current relays, J1-1 is a normally open contact of a J112V direct current relay, J2-1 is a normally open contact of a J212V direct current relay, C1 is an electrolytic capacitor, R1 and R1 are metal film resistors, D3 is an infrared transmitting tube, D4 is an infrared receiving tube, TWH8751 is a switch driving chip, W1 is a potentiometer, and D1 is a diode;
the sensor consists of an infrared emission tube, a receiving tube and a corresponding circuit, and is an infrared photoelectric switch sensor, and the working principle is as follows: the hand I is put on the joint of the standard device and the detected device, and the infrared transmitting tube reflects the infrared tube and is received by the infrared receiving tube due to the shielding of the hand, and a corresponding circuit is started to send out a group of connected electric contact signals;
the circuit principle is as follows: when light is applied, the 1 pin of the chip TWH8751 is at high potential, the TWH8751 is cut off, J is powered off, and J1-1 (J2-1) is disconnected. When the hand stretches in to block light, D4 presents a large resistance, the 2 pin of the IC is at a low potential, the output end of the IC is conducted, and J1-1 (J2-1) is connected.
The pressure switch is a microminiature pressure switch which is commonly used in the market, the pressure input interface end is connected with the pressure cavity and is used for detecting the pressure in the pressure pump, an electrical contact signal is provided for the audible and visual annunciator, the normally open contact is closed at the moment, the pressure node is set to be between 0.02Mpa and 0.05Mpa through a test, for example, the pressure node of the pressure sensor is set to be 0.02Mpa, the pressure switch can be set to be higher than 0.02Mpa and is connected to be lower than 0.02Mpa, a contact is sent when the pressure detected by the pressure switch is higher than 0.02Mpa, the normally open contact of the pressure switch is closed and is connected to the audible and visual annunciator through a wire, the audible and visual annunciator is connected to send an alarm at the moment, and when the pressure detected by the pressure switch is lower than 0.02Mpa, the normally open contact of the audible and visual annunciator is not connected, and therefore the audible and visual annunciator can be disassembled.
Claims (2)
1. A hydraulic pump for calibration with pressure relief early warning, its composition includes: pressure chamber and hand pump, characterized by: the two sides of the top surface of the pressure cavity are respectively fixed with a sensor, the side surface of the pressure cavity is fixed with a pressure switch, and the bottom surface of the pressure cavity is fixed with an audible and visual alarm and a lithium battery;
and the normally open contacts of the two sensors are connected in parallel and then connected with the normally open contact of the pressure switch in series on a power supply circuit of the audible and visual alarm.
2. The hydraulic pump for calibration with pressure relief warning of claim 1, wherein: the sensor is an infrared photoelectric switch sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320790156.9U CN219932366U (en) | 2023-04-11 | 2023-04-11 | Hydraulic pump for calibration with pressure release early warning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320790156.9U CN219932366U (en) | 2023-04-11 | 2023-04-11 | Hydraulic pump for calibration with pressure release early warning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219932366U true CN219932366U (en) | 2023-10-31 |
Family
ID=88489610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320790156.9U Active CN219932366U (en) | 2023-04-11 | 2023-04-11 | Hydraulic pump for calibration with pressure release early warning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219932366U (en) |
-
2023
- 2023-04-11 CN CN202320790156.9U patent/CN219932366U/en active Active
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