CN214493465U - Explosion-proof evacuation nitrogen charging device - Google Patents
Explosion-proof evacuation nitrogen charging device Download PDFInfo
- Publication number
- CN214493465U CN214493465U CN202120774958.1U CN202120774958U CN214493465U CN 214493465 U CN214493465 U CN 214493465U CN 202120774958 U CN202120774958 U CN 202120774958U CN 214493465 U CN214493465 U CN 214493465U
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- vacuum
- explosion
- proof
- mounting assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The utility model discloses an explosion-proof vacuumizing nitrogen charging device, which comprises a vacuumizing system, an electrical system, a mounting assembly and a nitrogen charging system, wherein the vacuumizing system is electrically connected with the electrical system and comprises an air exhaust end, the air exhaust end of the vacuumizing system is connected with the mounting assembly, the air inlet end of the mounting assembly is connected to an object to be pumped, and the nitrogen charging system and the vacuumizing system share the mounting assembly; and a filter for oil-gas separation is arranged between the vacuumizing system and the mounting assembly. The utility model discloses electric system controls the break-make of motor rotation circuit through the closure of relay, and the circuit can effectively reduce the production of motor circular arc spark among the circular telegram process to guarantee motor and operator's safety.
Description
Technical Field
The utility model belongs to the technical field of equipment evacuation nitrogen charging storage under water uses equipment, concretely relates to explosion-proof evacuation nitrogen charging device.
Background
At present, the storage of a lot of substances, equipment and food needs to be carried out sealed storage on the packaging box, the safe storage and the sealing property of the equipment must be ensured during the storage, the oxygen must be ensured as little as possible in the box, enough nitrogen is provided for isolating the oxygen, the oxidation and the corrosion of the equipment can be effectively prevented, and the equipment is well protected. Therefore, the storage environment inside the package directly affects the performance of the equipment or food.
The packing box evacuation mainly realizes through evacuation equipment, therefore, evacuation equipment's quality will directly influence product quality and efficiency of software testing, and traditional evacuation fills nitrogen equipment operation about 30min after, makes the evacuation speed slow because of generating heat, causes vacuum pump oil emulsification easily especially under the condition of being full of complicated gas and granule, and receives the influence of pipeline loss and connected mode, has reduced equipment work efficiency by a wide margin, has prolonged the oxygen extraction time. Can not meet the requirements of mass production and nitrogen-filling sealing storage of packing boxes, and is not beneficial to the generalization of nitrogen-filling equipment.
At present, an efficient explosion-proof vacuumizing nitrogen filling device is lacked in the field of vacuumizing nitrogen filling.
SUMMERY OF THE UTILITY MODEL
After the evacuation nitrogen filling equipment that exists moves a period to among the prior art, make the extraction vacuum speed slow down because of generating heat, and the reduction equipment that leads to causes vacuum pump oil emulsification easily, has prolonged the problem of oxygen extraction time, the utility model provides an explosion-proof evacuation nitrogen filling device.
In order to solve the technical problem, the utility model discloses a following technical scheme:
an explosion-proof vacuumizing nitrogen charging device comprises a vacuumizing system, an electrical system, a mounting assembly and a nitrogen charging system, wherein the vacuumizing system is electrically connected with the electrical system and comprises a pumping end, the pumping end of the vacuumizing system is connected with the mounting assembly, the gas inlet end of the mounting assembly is connected to an object to be pumped, and the nitrogen charging system and the vacuumizing system share the mounting assembly;
and a filter for oil-gas separation is arranged between the vacuumizing system and the mounting assembly.
When the anti-explosion circuit is implemented, the circuit controls the on-off of the motor rotating circuit through the closing of the relay, and the circuit can effectively reduce the generation of arc sparks in the electrifying process of the motor, so that the safety of the motor and an operator is ensured, and the anti-explosion effect is achieved.
During the use, an operator firstly controls the work of the vacuum pumping system through a relay of the electrical system, gas in the object to be pumped is pumped out to reach a preset vacuum degree value, then the vacuum pumping system is closed, and the nitrogen charging system is opened to charge nitrogen into the object to be pumped until the preset pressure value is reached.
When the vacuum pumping system selects a specific power pump, a hydraulic ejector, a steam type jet pump, a reciprocating pump, an explosion-proof vacuum pump and the like can be selected. The power pump is connected with the filter, lubricating oil in the power pump and the pumped gas are discharged into the oil separator together, oil and gas are separated under the action of the exhaust filter, the lubricating oil falls back to the bottom of the oil separator and enters the working cavity again through the float valve, and the gas without oil is discharged to the atmosphere through the exhaust nozzle.
Further, the electrical system comprises an air switch and a relay electrically connected with the air switch, wherein the relay is used for controlling the starting or stopping of a vacuum pump motor of the vacuum pumping system.
Furthermore, the electric system also comprises a control circuit of the relay, the control circuit comprises a normally closed switch, a normally open switch and a coil of the relay which are sequentially connected in series to form a serial loop, and the two ends of the normally open switch are also connected with the normally open contact switch of the relay in parallel. The main function is a circuit for controlling the starting and stopping of the motor, and the control circuit controls whether a coil of the relay is electrified or not through a 'starting' switch so as to control the starting and the stopping of the motor of the vacuum-pumping system.
Further, the electric system still includes fuse and thermal protector, the vacuum pump motor is connected through thermal protector, relay's contactor, fuse in proper order air switch. The circuit is additionally provided with a fuse protector and a thermal protector, and the double protection effect is achieved on the operation of the whole motor.
Further, the installation component comprises a pipeline formed by connecting air pipes, a joint is arranged at one end of the pipeline and used for being connected to an object to be pumped, a vacuum gauge for measuring vacuum degree and a vacuum pressure gauge for displaying the vacuum degree are installed on the pipeline, and a normally closed interface of the vacuum gauge is connected in series to a control circuit of the relay.
Further, the joint of installation component uses the universal joint, and each connects the adapter that can dismantle and be connected with multiple different models.
The sensor for measuring the vacuum degree is arranged at the air suction opening of the object to be sucked, the collected vacuum pressure value in the object to be sucked is fed back to the vacuum gauge, and when the pressure value in the object to be sucked reaches the set value of the vacuum gauge, the normally closed interface J1 of the vacuum gauge is disconnected, so that the circuit for controlling the rotation of the motor is disconnected, the motor stops rotating, and the vacuumizing is stopped.
The sensor for measuring the vacuum degree can adopt a vacuum gauge: the vacuum pressure value in the pumped part can be timely and accurately known, and a ZDR series resistance type vacuum gauge is selected. The model adopts a constant-power constant-temperature technology, and has the characteristics of super-strong stability, wide effective measurement range, extremely high response speed, small zero/full scale drift and the like. It is especially suitable for coarse and low vacuum measurement and control. The resistance vacuum gauge consists of a resistance gauge (Pirani gauge) and an electronic circuit, wherein the circuit completes the constant temperature power regulation of a heating wire of the resistance gauge, the sampling of a measurement bridge circuit voltage signal which changes along with the vacuum degree, the amplification conditioning, the A/D conversion, the nonlinear processing and the operation of a microprocessor and the display of the microprocessor.
Further, the vacuum pumping system comprises an explosion-proof vacuum pump, and the explosion-proof vacuum pump is connected to the filter through an air pipe.
In operation, the eccentrically mounted rotor rotates within the pump body and centrifugal force forces the vanes to slide along the slots of the rotor toward the inner wall of the pump body. The crescent space between the pump body and the rotor is divided into a plurality of working cavities by the blades. When the working chamber is connected to the gas inlet, gas is sucked in. As the rotor continues to rotate, the drawn-in gas is compressed and then discharged into the oil separator. The constant pressure differential forces the vacuum pump lubrication oil into the compression chambers. The lubricating oil and the pumped gas are discharged into the oil separator together, oil and gas are separated under the action of the exhaust filter, the lubricating oil falls back to the bottom of the oil separator and enters the working cavity again through the float valve, and the gas without oil is discharged to the atmosphere through the exhaust nozzle.
The temperature coefficient is the temperature of room temperature and the gas sucked into the vacuum pump, and the higher the coefficient is with the increase of working time, the more efficient heat dissipation design is needed for the required product, and the oil lubrication type vacuum pump is a better choice. The environmental coefficient refers to the problems of noise, heat and environmental pollution caused by vacuum products. The oil-sealed vacuum pump cannot pollute the environment; the noise generated in the operation process does not exceed 70 db; under the normal working state, the temperature of the oil-sealed vacuum pump is not more than 85 ℃, so that the pump is suitable for use. The gas composition coefficient refers to whether the gas sucked into the vacuum pump contains high water content or high corrosiveness. Because the interior of the tested product is subjected to electroplating and paint spraying treatment, certain corrosive gas is generated, and therefore the selected vacuum pump has the requirement of corrosion resistance.
Further, the nitrogen charging system comprises a nitrogen charging connector connected with the air pipe of the installation assembly, and the nitrogen charging connector is used for being connected with a nitrogen source.
Furthermore, the vacuum-pumping system, the electrical system, the mounting assembly and the nitrogen charging system are all fixed in the cabinet body. The lower corner of the cabinet body can be provided with a static conductive grounding terminal, and after the cabinet is properly placed, a static grounding lead is connected so as to lead away static accumulated in the cabinet body in time. During actual installation, the nitrogen charging system or the vacuumizing system can be installed outside the cabinet body and designed according to actual requirements.
Vacuum manometer and vacuum gauge directly adorn on the pipeline, can the pressure value of real-time observation gas circuit, and the one end joint of the installation component who makes up is connected with being taken out the object, and vacuum gauge signal cable is connected with electrical system, and nitrogen gas connects and is connected with the gas source, realizes the evacuation of object and detects and fill the nitrogen process.
When the set vacuum pressure value is reached, the vacuum ball valve is closed after the explosion-proof vacuum pump is stopped, the nitrogen control valve is opened, the packing box can be inflated, the utilization rate of equipment is greatly improved, materials are saved, and the testing time is shortened. The cabinet body sub-unit connection has a plurality of wheels that remove to improve equipment's mobility.
Compared with the prior art, the scheme has the beneficial effects that:
1. the electric system who designs air switch and relay carries out the electric control to vacuum pumping system, and this circuit controls the break-make of motor rotation circuit through the closure of relay, and the circuit can effectively reduce the production of motor circular arc spark in-process, avoids the explosion under being full of inflammable and explosive dust operational environment, has increased the reliability that the equipment used to guarantee motor and operator's safety. Lubricating oil in the evacuation system enters the compression chambers by designing a filter between the evacuation system and the mounting assembly. The lubricating oil and the pumped gas are discharged into the filter together, oil and gas are separated under the action of the filter, the lubricating oil falls back to the bottom of the oil separator and enters the working cavity again through the float valve, and the gas without oil is discharged to the atmosphere through the exhaust nozzle.
2. The nitrogen charging system and the vacuumizing system share one mounting assembly, one end of the mounting assembly is connected with an object to be pumped, the other end of the mounting assembly is connected with an air source, after the device is started, the vacuumizing system starts to work to gradually pump air in the object to be pumped, when the pressure value in the object to be pumped reaches a set value, a circuit of the vacuumizing system is controlled to be disconnected, vacuumizing is stopped, the nitrogen charging system is opened, the object to be pumped can be inflated, the utilization rate of the device is greatly improved, materials are saved, and the test time is shortened.
Drawings
FIG. 1 is a schematic view of an explosion-proof vacuum nitrogen charging device;
FIG. 2 is a schematic view of a mounting assembly;
FIG. 3 is a schematic circuit diagram of an explosion-proof vacuum-pumping nitrogen-charging device.
The reference numbers in the figures are in order: the device comprises an object to be pumped 1, a vacuum pumping system 2, a filter 21, a pipeline 22, a flange 23, an explosion-proof vacuum pump 24, a vacuum ball valve 25, a four-way joint 26, an electrical system 3, a mounting assembly 4, a vacuum pressure gauge 41, a vacuum gauge 42, a vacuum control valve 43, a nitrogen charging system 5, a nitrogen charging joint 51 and a nitrogen charging control valve 52.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, an explosion-proof vacuum-pumping nitrogen-charging device comprises a vacuum-pumping system 2, an electrical system 3, a mounting assembly 4 and a nitrogen-charging system 5, wherein the vacuum-pumping system 2 is electrically connected with the electrical system 3, the vacuum-pumping system 2 comprises a gas-pumping end, the mounting assembly 4 is connected to the gas-pumping end of the vacuum-pumping system 2, the gas-inlet end of the mounting assembly 4 is connected to an object 1 to be pumped, and the nitrogen-charging system 5 and the vacuum-pumping system 2 share the mounting assembly 4;
a filter 21 for oil-gas separation is arranged between the vacuum-pumping system 2 and the mounting component 4.
As shown in figure 3, when the anti-explosion circuit is implemented, the circuit controls the on-off of the motor rotating circuit through the closing of the relay, and the circuit can effectively reduce the generation of arc sparks in the process of electrifying the motor, so that the safety of the motor and an operator is ensured, and the anti-explosion effect is achieved.
During the use, an operator firstly controls the work of the vacuumizing system 2 through a relay of the electrical system 3, gas in the object 1 to be pumped is pumped out to reach a preset vacuum degree value, then the vacuumizing system 2 is closed, and the nitrogen charging system 5 is opened to charge nitrogen into the object 1 to be pumped until a preset pressure value is reached.
When the vacuum pumping system 2 selects a specific power pump, a hydraulic ejector, a steam jet pump, a reciprocating pump, an explosion-proof vacuum pump 24 and the like can be selected. The power pump is connected with the filter 21, the lubricating oil in the power pump and the pumped fluid are discharged into the oil separator together, oil and gas are separated under the action of the exhaust filter 21, the lubricating oil falls back to the bottom of the oil separator and enters the working cavity again through the float valve, and the gas without oil is discharged to the atmosphere through the exhaust nozzle.
Further, the electrical system 3 also includes a fuse and a thermal protector. The circuit is additionally provided with a fuse protector and a thermal protector, so that the operation of the whole motor is protected doubly, the working time of the vacuum pump is about 30 minutes generally, and the fuse protector and the thermal protector are selected to be lower than the rated current in order to protect the motor of the vacuum pump.
Further, the electric system 3 also comprises a control circuit for controlling the relay, the main function of the control circuit is to realize the starting and stopping of the motor of the vacuum pump, and the control circuit controls whether the coil of the relay is electrified or not through a 'starting 2' normally-open switch and a 'stopping 2' normally-closed switch, so that the starting and the stopping of the motor of the vacuum pumping system 2 are controlled. When the 'start 2' button is pressed, a self-locking circuit is formed after the relay is electrified, so that a coil of the relay KM1 is always in an electrified state after the starting switch is disconnected, the relay KM1 is always in a closed state, three-phase 380V voltage is supplied to a three-phase motor, and the vacuum pump runs. Or pressing a 'stop 2' button to disconnect the control circuit to realize the emergency stop control of the motor. Or when the temperature of the thermal protector KM2 is too high, the corresponding normally-closed switch KM2-NC is opened, and the control circuit is also opened, so that the motor is protected from overheating operation.
The 220V alternating current in the circuit is obtained by converting 380V through the converter, and the converter can avoid three-phase loss or three-phase power mismatching caused by control circuit faults, so that the three-phase motor is not interfered by an external circuit.
Further, the installation component 4 comprises a pipeline 22 formed by connecting air pipes, a joint is arranged at one end of the pipeline 22 and used for being connected to the pumped object 1, a vacuum gauge for measuring vacuum degree and a vacuum pressure gauge 41 for displaying vacuum degree are installed on the pipeline 22, and a normally closed interface of the vacuum gauge is connected in series to a control circuit of the relay. The sensor for measuring the vacuum degree is arranged at the air suction opening of the object 1 to be sucked, the collected vacuum pressure value in the object 1 to be sucked is fed back to the vacuum gauge, and when the pressure value in the object 1 to be sucked reaches the set value of the vacuum gauge, the normally closed interface J1 of the vacuum gauge is disconnected, so that the circuit for controlling the motor to rotate is disconnected, the motor stops rotating, and the vacuum pumping is stopped.
The sensor for measuring the degree of vacuum may employ a vacuum gauge 42: the vacuum pressure value in the pumped part can be timely and accurately known, and a ZDR series resistance type vacuum gauge is selected. The model adopts a constant-power constant-temperature technology, and has the characteristics of super-strong stability, wide effective measurement range, extremely high response speed, small zero/full scale drift and the like. It is especially suitable for coarse and low vacuum measurement and control. The resistance vacuum gauge consists of a resistance gauge (Pirani gauge) and an electronic circuit, wherein the circuit completes the constant temperature power regulation of a heating wire of the resistance gauge, the sampling of a measurement bridge circuit voltage signal which changes along with the vacuum degree, the amplification conditioning, the A/D conversion, the nonlinear processing and the operation of a microprocessor and the display of the microprocessor.
Fig. 3 is also provided with a working indicator lamp control circuit, when the button 'start 1' is pressed, the corresponding starting indicator lamp is powered on, and when the button 'stop 1' is pressed, the starting indicator lamp is powered off and is extinguished, and the stopping indicator lamp is powered on and is lighted.
Further, the joint of installation component 4 uses the universal joint, and each connects the adapter that can dismantle and be connected with multiple different models.
The universal mounting interface is considered during design, the structure of the clamping type vacuum quick-release flange 23 is utilized, and the mounting interface with the vacuum quick-release flange 23 is designed, so that the mounting interfaces of different models can be rapidly replaced, the mounting interfaces of different models can correspond to different objects 1 to be pumped, and the universality of the equipment is improved.
Further, the vacuum pumping system 2 comprises an explosion-proof vacuum pump 24 at the air exhaust end, the explosion-proof vacuum pump 24 is connected with a filter 21 through an air pipe, and the filter 21 is connected to the mounting assembly 4 through an air pipe.
In operation, the eccentrically mounted rotor rotates within the pump body and centrifugal force forces the vanes to slide along the slots of the rotor toward the inner wall of the pump body. The crescent space between the pump body and the rotor is divided into a plurality of working cavities by the blades. When the working chamber is connected to the gas inlet, gas is sucked in. As the rotor continues to rotate, the drawn-in gas is compressed and then discharged into the oil separator. The constant pressure differential forces the vacuum pump lubrication oil into the compression chambers. The lubricating oil and the pumped gas are discharged into the oil separator together, oil and gas are separated under the action of the exhaust filter 21, the lubricating oil falls back to the bottom of the oil separator and enters the working cavity again through the float valve, and the gas without oil is discharged to the atmosphere through the exhaust nozzle.
The explosion-proof vacuum pump 24 is an important component of the explosion-proof vacuum pumping and nitrogen charging device, the temperature coefficient refers to the temperature of the room temperature and the gas sucked into the vacuum pump, the higher the coefficient is with the increase of the working time, the more efficient the heat dissipation design is required for the required product, and the oil lubrication type vacuum pump is a better choice. The environmental coefficient refers to the problems of noise, heat and environmental pollution caused by vacuum products. The oil-sealed vacuum pump cannot pollute the environment; the noise generated in the operation process does not exceed 70 db; under the normal working state, the temperature of the oil-sealed vacuum pump is not more than 85 ℃, so that the pump is suitable for use. The gas composition coefficient refers to whether the gas sucked into the vacuum pump contains high water content or high corrosiveness. Because the interior of the tested product is subjected to electroplating and paint spraying treatment, certain corrosive gas is generated, and therefore the selected vacuum pump has the requirement of corrosion resistance.
Further, the nitrogen charging system 5 comprises a nitrogen charging connector 51 connected with the air pipe of the installation component 4, a nitrogen charging control valve 52 is arranged on the pipeline 22 between the nitrogen gas connector and the vacuum control valve 43, and the nitrogen charging connector 51 is connected with a nitrogen gas source.
Vacuum pressure gauge 41 and vacuum gauge 42 directly adorn on pipeline 22, connect vacuum control valve 43 on pipeline 22 specifically, install vacuum pressure gauge 41 on vacuum control valve 43, the pressure value of can real-time observation gas circuit, the one end joint of the installation component 4 that makes up is connected with by the object 1 of taking out, vacuum gauge 42 signal cable is connected with electrical system 3, nitrogen gas connects with the air supply and is connected, realizes the evacuation of object and detects and fill the nitrogen process.
The pipeline is connected with a vacuum ball valve 25, the vacuum ball valve 25 is connected with a four-way joint 26, the four-way joint 26 is connected with a vacuum gauge pipe 42, and a signal line cable of the vacuum gauge pipe 42 outputs a signal to an electric control system. When the set vacuum pressure value is reached, the vacuum ball valve 25 is closed after the explosion-proof vacuum pump 24 is shut down, and the nitrogen control valve is opened, so that the pumped object 1 can be inflated, the utilization rate of the equipment is greatly improved, the material is saved, and the test time is reduced.
Furthermore, the vacuum-pumping system, the electrical system, the mounting assembly and the nitrogen charging system are all fixed in the cabinet body. The cabinet body is internally provided with a plurality of cooling fans which are arranged on two sides of the cabinet body. The lower part of the cabinet body is connected with a plurality of movable wheels. To improve the mobility of the device.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the technical scope of the present invention, and the technical scope of the present invention is also considered to fall into the scope of the claims.
Claims (10)
1. The utility model provides an explosion-proof evacuation nitrogen charging device which characterized in that: the nitrogen filling device comprises a vacuumizing system, an electrical system, a mounting assembly and a nitrogen filling system, wherein the vacuumizing system is electrically connected with the electrical system and comprises a pumping end, the pumping end of the vacuumizing system is connected with the mounting assembly, the air inlet end of the mounting assembly is connected to an object to be pumped, and the nitrogen filling system and the vacuumizing system share one mounting assembly;
and a filter for oil-gas separation is arranged between the vacuumizing system and the mounting assembly.
2. An explosion-proof evacuated nitrogen-filling device as defined in claim 1, wherein: the electric system comprises an air switch and a relay electrically connected with the air switch, and the relay is used for controlling the starting or stopping of a vacuum pump motor of the vacuum pumping system.
3. An explosion-proof evacuated nitrogen dosing device as claimed in claim 2, wherein: the electric system further comprises a control circuit of the relay, the control circuit comprises a normally closed switch, a normally open switch and a coil of the relay, the normally closed switch, the normally open switch and the coil of the relay are sequentially connected in series to form a serial circuit, and the normally open contact switch of the relay is further connected in parallel at two ends of the normally open switch.
4. An explosion-proof evacuated nitrogen dosing device as claimed in claim 3, wherein: the electric system further comprises a fuse protector and a thermal protector, and the vacuum pump motor is connected with the air switch sequentially through the thermal protector, a contactor of the relay and the fuse protector.
5. An explosion-proof evacuated nitrogen dosing device as claimed in claim 3, wherein: the installation component comprises a pipeline formed by connecting air pipes, a joint is arranged at one end of the pipeline and used for being connected to an object to be pumped, a vacuum gauge for measuring vacuum degree and a vacuum pressure gauge for displaying the vacuum degree are installed on the pipeline, and a normally closed interface of the vacuum gauge is connected in series to be connected into a control circuit of the relay.
6. An explosion-proof evacuated nitrogen dosing device as claimed in claim 5, wherein: the joint of installation component uses the universal joint, and each connects the adapter that can dismantle and be connected with multiple different models.
7. An explosion-proof evacuated nitrogen-filling device as defined in claim 1, wherein: the vacuum pumping system comprises an explosion-proof vacuum pump, and the explosion-proof vacuum pump is connected to the filter through an air pipe.
8. An explosion-proof evacuated nitrogen-filling device as defined in claim 1, wherein: the nitrogen charging system comprises a nitrogen charging connector connected with the air pipe of the mounting assembly, and the nitrogen charging connector is used for being connected with a nitrogen source.
9. An explosion-proof evacuated nitrogen-filling device as defined in claim 1, wherein: the vacuum-pumping system, the electrical system, the mounting assembly and the nitrogen-charging system are all fixed in the cabinet body.
10. An explosion-proof evacuated nitrogen dosing device as claimed in claim 9, wherein: the lower part of the cabinet body is connected with a plurality of movable wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120774958.1U CN214493465U (en) | 2021-04-15 | 2021-04-15 | Explosion-proof evacuation nitrogen charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120774958.1U CN214493465U (en) | 2021-04-15 | 2021-04-15 | Explosion-proof evacuation nitrogen charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214493465U true CN214493465U (en) | 2021-10-26 |
Family
ID=78203124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120774958.1U Active CN214493465U (en) | 2021-04-15 | 2021-04-15 | Explosion-proof evacuation nitrogen charging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214493465U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115258318A (en) * | 2022-06-30 | 2022-11-01 | 河北汉光重工有限责任公司 | High-temperature inflating device and method |
-
2021
- 2021-04-15 CN CN202120774958.1U patent/CN214493465U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115258318A (en) * | 2022-06-30 | 2022-11-01 | 河北汉光重工有限责任公司 | High-temperature inflating device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214493465U (en) | Explosion-proof evacuation nitrogen charging device | |
| CN110748478A (en) | Air compressor machine performance testing platform | |
| CN207500115U (en) | Screw type water steam compression system | |
| CN107701442A (en) | Screw type water steam compression system | |
| CN201910689U (en) | Positive-pressure shell type three-phase asynchronous motor | |
| CN201934299U (en) | Energy-saving control system of mechanical vacuum pump | |
| CN2660773Y (en) | Vacuum cooling fan | |
| CN217199955U (en) | Nitrogen bag type safety and environment protection device for normal-pressure oil product storage tank | |
| CN105927541B (en) | Air blast for the supercharging of inflammable and explosive etchant gas or blower unit | |
| CN202541907U (en) | Control circuit for vacuum packaging machine | |
| CN200953451Y (en) | Closed bus-bar micro-positive voltage controller | |
| CN212867907U (en) | Screw air compressor control system | |
| CN110094967A (en) | A kind of vacuum drying oven using dry type screw pump | |
| CN215626775U (en) | Skid-mounted refueling device with oil gas recovery system | |
| CN202732345U (en) | Vacuum air exhauster | |
| CN107631169A (en) | A kind of circumscribed is evacuated aerating device | |
| CN210686265U (en) | Leakage detection device for high-performance petroleum vacuum pump | |
| CN210111458U (en) | Gas insulation switch cabinet | |
| CN208057344U (en) | A kind of novel non-oil air compressor with temperature protection control function | |
| CN205779703U (en) | Air blast or blower unit for inflammable and explosive etchant gas supercharging | |
| CN207069762U (en) | The special Flame-Proof Three-Phase Induction Motors of colliery conveyer | |
| CN206770151U (en) | A kind of vacuum air pump | |
| CN112594184A (en) | Main unit of aluminum alloy rotor oil-free screw compressor (Single stage) | |
| CN201574933U (en) | Starting unloading valve for Root's blower | |
| CN101769255A (en) | Long-lifetime compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |