CN216851553U - Water supply, drainage and pressurization device for explosion-proof motor shell - Google Patents
Water supply, drainage and pressurization device for explosion-proof motor shell Download PDFInfo
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- CN216851553U CN216851553U CN202122959574.XU CN202122959574U CN216851553U CN 216851553 U CN216851553 U CN 216851553U CN 202122959574 U CN202122959574 U CN 202122959574U CN 216851553 U CN216851553 U CN 216851553U
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Abstract
The utility model relates to a water supply, drainage and pressurization device of an explosion-proof motor shell.A water tank outside is connected with a press of the explosion-proof motor shell to be tested through a manual ball valve, a horizontal water injection pump and a water injection electric control ball valve and is used for injecting water into the press of the explosion-proof motor shell to be tested; the external water tank is connected with a press of the explosion-proof motor shell to be tested through a manual ball valve, a vertical multistage centrifugal pump set, a check valve and an electric control ball valve, and is used for carrying out secondary pressurization on water pressure injected into the explosion-proof motor shell. The utility model does not adopt the structure of the traditional cycloid gear pump, but adopts a multistage centrifugal pump, adopts a secondary pressurization mode in order to ensure that the hydraulic pressure injected into the shell of the explosion-proof motor is satisfied, and simultaneously adopts a PLC control system to control the on and off of an electromagnetic ball valve and a water pump motor in order to avoid the misoperation of personnel; and increasing a pressure sensor in the pipeline to test the water pressure in the pipeline, and determining whether the detected water pressure meets the test requirement of the shell.
Description
Technical Field
The utility model relates to an explosion-proof motor shell, in particular to a water supply, drainage and pressurization device for the explosion-proof motor shell.
Background
The explosion-proof motor has wide application places, and is widely applied to industries such as petrifaction, coal mines, chemical engineering, medicines, foods and the like. Before the explosion-proof motor is assembled, a motor shell needs to be subjected to a hydraulic pressure withstand test, and in the test process, an operator needs to manually open a valve to perform a water injection withstand test. Because the existing equipment is old, the used water injection and return water are provided by a cycloid gear pump, a manual ball valve and the like, the gear pump is easy to be frequently damaged in the process of water inlet and return, and the water pressure is insufficient; if the ball valve is not closed in time by an operator, the waste of water resources is caused, and a simple booster pump is needed to supply water and boost pressure for the shell independently for improving the bearing capacity of the explosion-proof motor shell. This is likely to cause troublesome and inconvenient operations.
Disclosure of Invention
The utility model provides a water supply, drainage and pressurization device for an explosion-proof motor shell, which is used for solving and improving the water injection pressure of the explosion-proof motor shell and ensuring that the pressure required by a shell test can be achieved.
In order to achieve the purpose, the technical scheme of the utility model is as follows: a water supply, drainage and pressurization device of an explosion-proof motor shell comprises an external water tank, two sets of vertical multistage centrifugal pump sets, a check valve, a pressure sensor, a flow switch and an electric control ball valve, wherein the external water tank is connected with a press of the explosion-proof motor shell to be tested through a manual ball valve, a horizontal water injection pump and a water injection electric control ball valve and is used for injecting water into the press of the explosion-proof motor shell to be tested; the external water tank is connected with a press of the explosion-proof motor shell to be tested through a manual ball valve, two sets of vertical multistage centrifugal pump sets, a check valve and an electric control ball valve, and is used for carrying out secondary pressurization on water pressure injected into the explosion-proof motor shell.
Furthermore, a flow switch is arranged on a press of the tested explosion-proof motor casing, and the flow switch is connected with the horizontal water injection pump and the water injection electric control ball valve through a PLC controller and is used for controlling the horizontal water injection pump and the water injection electric control ball valve to work.
Furthermore, the two sets of vertical multistage centrifugal pump sets are formed by connecting a front water pump and a booster water pump in series.
Furthermore, a pressure sensor and a pressure sensor are arranged on an additional pipeline of a press of the tested explosion-proof motor shell; the pressure sensor sends a detected electric signal when the pressurization of the booster water pump reaches the required casing test pressure to the PLC controller, and the PLC controller outputs a control signal to the front water pump, the booster water pump motor and the electric control ball valve to stop the operation of the front water pump and the booster water pump motor and close the electric control ball valve, so that the water seal is stored in the motor casing to carry out corresponding test.
Furthermore, the PLC controller is connected with the booster water pump through the frequency converter, and the pressure sensor sends out an electric signal to control the frequency converter through the PLC controller, so that the rotating speed of a motor of the booster pump is controlled.
Furthermore, the press of the tested explosion-proof motor shell is connected with an external water tank through an electromagnetic valve and a water return pump, and the press is used for draining water in the tested explosion-proof motor shell through the electromagnetic valve and the water return pump and returning the water into the external water tank.
The utility model has the beneficial effects that:
the utility model does not adopt the structure of the traditional cycloid gear pump, but adopts a stainless steel multistage centrifugal pump. In order to ensure that the water pressure injected into the explosion-proof motor shell is met, a secondary pressurization mode and a secondary pressurization method are adopted. Meanwhile, in order to avoid misoperation of personnel, a PLC control system is adopted to control the on and off of the electromagnetic ball valve and the water pump motor; meanwhile, a pressure sensor is added in the pipeline to test the water pressure in the pipeline, and whether the detected water pressure meets the test requirement of the shell or not is judged.
Therefore, compared with the prior art, the utility model has the following advantages:
1. the control is convenient, and the testing pressure is adjustable and controllable.
2. The work efficiency is high, through PLC control operation, and degree of automation is high.
3. Low manufacturing cost, safety, reliability, wide application range and convenient maintenance.
4. The floor area is small, and limited resources such as personnel and fields are greatly saved.
Drawings
FIG. 1 is a schematic diagram of a water supply, drainage and pressurization device system of an explosion-proof motor casing.
Detailed Description
The utility model is further described with reference to the following figures and examples.
As shown in fig. 1, the water supply, drainage and pressurization device of the explosion-proof motor casing of the utility model comprises an external water tank 1, two sets of vertical multistage centrifugal pump sets, a check valve, a pressure sensor 9, a flow switch 11, an electric control ball valve 8 and the like.
The external water tank 1 is connected with a press of an explosion-proof motor shell to be tested through a manual ball valve, a horizontal water injection pump 4 and a water injection electric control ball valve 5. In the middle of this device, water in the middle of the outside water tank 1 is filled into the press of the explosion-proof motor casing that needs the test through horizontal water injection pump 4 and water injection automatically controlled ball valve 5, and the back of filling flows through flow switch 11, and flow switch 11 sends the electrical signal this moment, through electric system's PLC control, stops the motor stall of water injection pump 4. However, the water pressure in the housing is far from the required test pressure, which requires the corresponding pressure boosting device to operate.
The external water tank 1 is connected with a press of the explosion-proof motor shell to be tested through a manual ball valve, two sets of vertical multistage centrifugal pump sets, a check valve and an electric control ball valve 8. The two sets of vertical multistage centrifugal pump sets are formed by connecting a preposed water pump 6 (a small-lift vertical multistage centrifugal pump) and a booster water pump 7 (a large-lift vertical multistage centrifugal pump) in series. Water in the external water tank 1 enters the two-stage vertical multi-stage centrifugal pump set through the manual ball valve, enters the booster water pump 7 for secondary pressurization after flowing out of the outlet of the front water pump 6, and enters the pipeline through the check valve after pressurization. When the pressure sensor 9 detects that the pressure of the booster water pump 7 reaches the required casing test pressure, an electric signal is sent out, the motors of the front water pump 6 and the booster water pump 7 are controlled by the PLC to stop running, the electric control ball valve 8 is closed, water is sealed in the motor casing, and at the moment, the explosion-proof motor casing starts to perform corresponding tests.
The device can realize adjustable and controllable detection pressure of the explosion-proof motor shell. The measurement of the rotating speed of the motor of the booster pump and the pressure in the pipeline can be controlled by a frequency converter of the booster water pump 7 and a pressure sensor 9 in the booster system under the control of the PLC in the device, the detection specification of the shell of the explosion-proof motor can be effectively expanded through the mode, and the pressure of the test is accurate due to no artificial interference, so that the expected effect can be achieved.
After the test is finished, water in the explosion-proof motor shell is drained through the electromagnetic valve 3 and the water return pump 2, and the water is drained back into the water tank 1.
The technical parameters of the water supply, drainage and pressurization device of the explosion-proof motor shell are as follows:
1) water injection and drainage flow of a water pump entering and exiting the shell: not less than 12m3/h
2) The pressure which can be reached when the booster water pump injects water into the shell is as follows: not less than 2.5MPa
3) The pressure maintaining time can be achieved by injecting water into the shell by the booster water pump: less than or equal to 10 min.
Claims (3)
1. The utility model provides a water supply, drainage, supercharging device of explosion-proof machine casing which characterized in that: the device comprises an external water tank, two sets of vertical multistage centrifugal pump sets, a check valve, a pressure sensor, a flow switch and an electric control ball valve, wherein the external water tank is connected with a press of an explosion-proof motor shell to be tested through a manual ball valve, a horizontal water injection pump and a water injection electric control ball valve and is used for injecting water into the press of the explosion-proof motor shell to be tested; the external water tank is connected with a press of the explosion-proof motor shell to be tested through a manual ball valve, two sets of vertical multistage centrifugal pump sets, a check valve and an electric control ball valve and is used for carrying out secondary pressurization on water pressure injected into the explosion-proof motor shell; a flow switch is arranged on a press of the tested explosion-proof motor shell and is connected with the horizontal water injection pump and the water injection electric control ball valve through a PLC (programmable logic controller) and used for controlling the horizontal water injection pump and the water injection electric control ball valve to work; the pressure sensor and the pressure sensor are arranged on an additional pipeline of a press of the tested explosion-proof motor shell; the pressure sensor sends an electric signal to the PLC controller when the detected booster water pump pressure has reached the required casing test pressure, and the PLC controller outputs a control signal to the preposed water pump, the booster water pump motor and the electric control ball valve to stop the operation of the preposed water pump and the booster water pump motor and close the electric control ball valve, so that water is sealed in the motor casing to carry out corresponding test; the PLC controller is connected with the booster pump through the frequency converter, and the pressure sensor sends out an electric signal to control the frequency converter through the PLC controller, so that the rotating speed of a motor of the booster pump is controlled.
2. The water supply, water discharge and pressurization device for the explosion-proof motor shell according to claim 1, characterized in that: the two sets of vertical multistage centrifugal pump sets are formed by connecting a front water pump and a booster water pump in series.
3. The water supply, water discharge and pressurization device for the explosion-proof motor shell according to claim 1, characterized in that: and the press of the tested explosion-proof motor shell is connected with the external water tank through the electromagnetic valve and the water return pump, and is used for draining water in the tested explosion-proof motor shell through the electromagnetic valve and the water return pump and returning the water into the external water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122959574.XU CN216851553U (en) | 2021-11-29 | 2021-11-29 | Water supply, drainage and pressurization device for explosion-proof motor shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122959574.XU CN216851553U (en) | 2021-11-29 | 2021-11-29 | Water supply, drainage and pressurization device for explosion-proof motor shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216851553U true CN216851553U (en) | 2022-06-28 |
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ID=82104634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122959574.XU Active CN216851553U (en) | 2021-11-29 | 2021-11-29 | Water supply, drainage and pressurization device for explosion-proof motor shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216851553U (en) |
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2021
- 2021-11-29 CN CN202122959574.XU patent/CN216851553U/en active Active
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