Highly reliable vacuum system

Abstract

The application discloses a high-reliability vacuum system, and belongs to the field of water pump equipment, and solves the problem that the existing vacuum system cannot control the start and stop of a vacuum pump in time, and the vacuum pump is damaged too early. In the application, the vacuum system comprises a lower shell and an upper vacuum tank; the upper vacuum tank is installed at the top end of the lower shell, a communication channel is arranged between the top end of the lower shell and the lower end of the upper vacuum tank, and the inside of the lower shell and the inside of the upper vacuum tank are communicated through the communication channel; a liquid level sensor is installed on the inner side wall of the lower shell, and the horizontal height of the liquid level sensor is higher than the top end of an impeller of a water pump assembly; and the communication channel between the lower shell and the upper vacuum tank is provided with a floating sealing mechanism for sealing the communication channel when the inside of the lower shell is flooded by liquid. The high-reliability vacuum system has multistage protection, can cope with various abnormal working conditions, and ensures the reliability of the equipment.

Description

Technical Field

[0001] This utility model relates to a highly reliable vacuum system and belongs to the field of water pump equipment. Background Technology

[0002] Some water pumps are not self-priming due to their own structure. That is, when the inlet water level is lower than the volute, the water pump itself cannot draw water into the volute and needs an auxiliary vacuum system to draw water into the volute before it can start continuously pumping the medium.

[0003] Early vacuum systems could not control the start and stop of the vacuum pump in a timely manner. In practical applications, fibrous foreign objects in the medium were often sucked into the vacuum pump, causing premature damage to the vacuum pump and affecting its use. Utility Model Content

[0004] This invention provides a highly reliable vacuum system with multi-level protection, capable of handling various abnormal operating conditions and ensuring equipment reliability.

[0005] The technical solution adopted by this utility model is a highly reliable vacuum system, including a water pump assembly. The water pump assembly has a volute, and the water inlet end of the volute is connected to a water inlet connector pipe. The middle section of the water inlet connector pipe is connected to a vacuum system.

[0006] The vacuum system includes a lower housing and an upper vacuum tank; the upper vacuum tank is installed at the top of the lower housing, and there is a communication channel between the top of the lower housing and the bottom of the upper vacuum tank, and the interior of the lower housing and the interior of the upper vacuum tank are connected through the communication channel.

[0007] A liquid level sensor is installed on the inner side wall of the lower housing, and the horizontal height of the liquid level sensor is higher than the top of the impeller of the water pump assembly.

[0008] The communication channel between the lower housing and the upper vacuum tank has a floating sealing mechanism that closes the communication channel when the liquid submerges the interior of the lower housing.

[0009] The optimized, highly reliable vacuum system described above includes a floating sealing mechanism comprising a guide rod, a foam float, and a rubber float; the upper end of the guide rod is fixed relative to the opening of the communication channel facing the interior of the lower housing;

[0010] The foam float and the rubber float are sleeved on the guide rod and slide along the guide rod, with the foam float located below the rubber float.

[0011] The optimized, highly reliable vacuum system described above, including the floating sealing mechanism, further includes a fixed bracket for fixing the guide rod. The fixed bracket is fixed to the top of the lower housing and to the guide rod; the foam float and the rubber float are located inside the fixed bracket.

[0012] The optimized, highly reliable vacuum system described above has a float switch installed inside the upper vacuum tank, with the float of the float switch located on the lower-middle side wall inside the upper vacuum tank.

[0013] The optimized, highly reliable vacuum system described above has pressure gauges and manual valves connected to the vacuum pump installed on the side walls of the upper middle section of the upper vacuum tank.

[0014] The pressure gauge and manual valve are connected to the interior of the upper vacuum tank.

[0015] The optimized, highly reliable vacuum system described above has a transparent observation window built on the side wall of the lower housing, which is configured in conjunction with the floating sealing mechanism.

[0016] The advantages of this application are as follows: The technical solution of this application involves a multi-level protection vacuum system, which automatically controls the start and stop of the vacuum pump by real-time monitoring of the liquid level; at the same time, there is a physical switch to ensure that the vacuum pump can still be stopped in time when the first-level liquid level monitoring fails, so as to ensure that the medium does not enter the vacuum pump and increase the reliability of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this application;

[0018] Figure 2 This is a schematic diagram of the structure in this application when the float switch is not activated and the rubber float rises to seal the upper vacuum tank;

[0019] Figure 3 This is a schematic diagram of the structure after the float switch is activated in this application. Detailed Implementation

[0020] The technical features of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown, this utility model is a highly reliable vacuum system, including a water pump assembly and a vacuum system. The water pump assembly can utilize a conventional water pump structure from the prior art.

[0022] In one embodiment of this application, the pump assembly has a volute 1, and an inlet pipe 2 is connected to the inlet end of the volute 1. The pumped medium enters the volute 1 through the inlet pipe 2. One port of the inlet pipe 2 is connected to an inlet pipeline, and the end of the inlet pipeline away from the inlet pipe 2 is immersed in the medium to be pumped. The power input end of the volute 1 is connected to the motor structure of the pump drive unit 14. The outlet end of the volute 1 is connected to the outlet pipeline through a right-angle ball check valve 15.

[0023] In this application, the vacuum system is connected to the middle section of the water inlet connection pipe 2. For example... Figure 1As shown, the vacuum system of this application includes a lower housing 3 and an upper vacuum tank 4. In this application, the water inlet connection pipe 2 can be configured as a tee pipe, and the lower end of the lower housing 3 is connected to one of the interfaces of the water inlet connection pipe 2 through a flange. The interior of the lower housing 3 is in communication with the interior of the water inlet connection pipe 2.

[0024] The upper vacuum tank 4 is installed at the top of the lower housing 3. A communication channel exists between the top of the lower housing 3 and the bottom of the upper vacuum tank 4, and the interior of the lower housing 3 is connected to the interior of the upper vacuum tank 4 through this channel. The upper vacuum tank 4 is connected to the vacuum pump's evacuation end via a manual valve 12. A coaxial solenoid valve can be installed between the manual valve 12 and the vacuum pump to promptly close the pipeline when the vacuum pump stops working, reducing the amount of steam entering the vacuum pump; it can also prevent external pressure from allowing media to enter the vacuum pump under special circumstances, thus extending the vacuum pump's service life.

[0025] like Figure 2 As shown, in one embodiment of this application, a baffle is installed in a pipe that is open at the bottom and closed at the top, dividing the pipe into a lower shell 3 and an upper vacuum tank 4. The baffle has an opening in the middle. A flange is installed at the lower opening of the pipe, which connects to the corresponding port of the water inlet connection pipe 2. The opening in the middle of the baffle is closed by a gasket. The middle of the gasket is formed by stamping to create a funnel-shaped channel protruding upwards into the upper vacuum tank 4, which serves as a connecting channel. The shape of the lower opening of the connecting channel is designed to match the rubber float 8, allowing the rubber float 8 to seal the lower opening of the connecting channel after it rises.

[0026] The communication channel between the lower housing 3 and the upper vacuum tank 4 has a floating sealing mechanism that closes the communication channel when the liquid submerges the interior of the lower housing 3.

[0027] In one embodiment of this application, the floating enclosure mechanism includes a guide rod 6, a foam float 7, and a rubber float 8. The upper end of the guide rod 6 is fixed relative to the opening of the communication channel facing the interior of the lower housing 3.

[0028] Foam float 7 and rubber float 8 are sleeved on guide rod 6 and slide along guide rod 6, with foam float 7 located below rubber float 8.

[0029] When the liquid enters the lower shell 3 and submerges the foam float 7, the foam float 7 rises under the action of buoyancy and pushes the rubber float 8 upward.

[0030] In one embodiment of this application, the floating enclosure mechanism further includes a fixed bracket 601 for fixing the guide rod 6. The fixed bracket 601 is fixed to the top of the lower housing 3 and fixed to the guide rod 6. The foam float 7 and the rubber float 8 are located inside the fixed bracket 601.

[0031] In one embodiment of this application, the lower end of the guide rod 6 can be fixed to the support plate at the lower part of the fixed bracket 601, while the upper end of the guide rod 6 is spaced apart from the lower opening of the connecting channel. Alternatively, in another embodiment of this application, the lower end of the guide rod 6 can be fixed to the support plate at the lower part of the fixed bracket 601, while the upper end of the guide rod 6 is inserted into the lower opening of the connecting channel but spaced apart from the inner wall of the connecting channel. This ensures that the lower housing 3 and the upper vacuum tank 4 remain in communication when the rubber float 8 does not block the lower opening of the connecting channel.

[0032] In the technical solution of this application, the liquid level inside the lower shell 3 and the upper vacuum tank 4 can be sensed by multiple sensors set at different heights.

[0033] A liquid level sensor 5 is installed on the inner side wall of the lower housing 3, and the level of the liquid level sensor 5 is higher than the top of the impeller of the water pump assembly. A float switch 10 is installed inside the upper vacuum tank 4, and the float of the float switch 10 is located on the lower middle section of the inner side wall of the upper vacuum tank 4. The control output terminal of the float switch 10 is connected to the control input terminal of the vacuum pump.

[0034] Pressure gauges 11 and manual valves 12 connected to vacuum pumps are respectively installed on the side walls of the upper middle section of the upper vacuum tank 4. Pressure gauges 11 and manual valves 12 are connected to the interior of the upper vacuum tank 4.

[0035] A transparent observation window 13 is constructed on the side wall of the lower housing 3, and the observation height of the transparent observation window 13 is set in coordination with the floating sealing mechanism.

[0036] In the technical solution of this application, the right-angle ball check valve 15, the volute 1, the lower shell 3, the upper vacuum tank 4, and the end of the water inlet pipe are immersed in the medium to form a sealed cavity. After the vacuum pump is turned on, it draws a vacuum.

[0037] When the medium is drawn into the lower housing 3, the level sensor 5 detects the medium. At this time, the impeller is completely submerged in the medium, and the pumping of the medium can begin. After a certain delay to avoid frequent start-stop of the vacuum pump, the vacuum pump is turned off. If the level sensor 5 does not detect the medium, the vacuum pump is restarted.

[0038] If oil or other foreign objects in the medium damage the level sensor 5, causing the vacuum pump to fail to stop, the liquid level in the lower housing 3 will continue to rise. At this time, the foam float 7 will float up and raise the rubber float 8 to the top, contacting the lower opening of the connecting channel. The elastic deformation of the rubber float 8 will seal the lower opening of the connecting channel, thereby sealing the upper vacuum tank 4 to prevent the liquid level from rising further. If the operator can observe this situation in time through the transparent observation window, they can manually shut down the vacuum pump and check the level sensor and other components. Even without operator intervention, the rubber ball can seal the vacuum tank 4, preventing the medium from being sucked into the vacuum pump.

[0039] In more severe conditions, such as when fibrous foreign objects in the medium are trapped between the rubber float 8 and the lower opening of the connecting channel, and the vacuum pump is still running, the medium will enter the upper vacuum tank 4. Because the gap between the rubber float 8 and the lower opening of the connecting channel is small, there will be very few fibrous foreign objects in the medium entering the upper part. When the liquid level continues to rise and the float of the float switch 10 is lifted, the circuit of the vacuum pump will be directly disconnected, the vacuum pump will be shut down, and the coaxial valve will be closed at the same time.

[0040] In summary, this vacuum system can ensure overall reliability without the need for tooling personnel to monitor it in real time.

[0041] Staff can monitor the liquid level through the transparent viewing cover, and the pressure gauge on top can detect whether the vacuum pump is working properly. If necessary, the vacuum pump can be manually turned off.

[0042] Of course, the above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A highly reliable vacuum system, comprising a water pump assembly having a volute (1) and an inlet pipe (2) connected to the inlet end of the volute (1); characterized in that: A vacuum system is connected to the middle section of the water inlet connection pipe (2); The vacuum system includes a lower housing (3) and an upper vacuum tank (4); the upper vacuum tank (4) is installed at the top of the lower housing (3), and there is a communication channel between the top of the lower housing (3) and the lower end of the upper vacuum tank (4), and the interior of the lower housing (3) is connected to the interior of the upper vacuum tank (4) through the communication channel. A liquid level sensor (5) is installed on the inner side wall of the lower housing (3), and the horizontal height of the liquid level sensor (5) is higher than the top of the impeller of the water pump assembly. The communication channel between the lower housing (3) and the upper vacuum tank (4) has a floating sealing mechanism that closes the communication channel when the liquid submerges the interior of the lower housing (3).

2. The high-reliability vacuum system according to claim 1, characterized in that: The floating enclosure mechanism includes a guide rod (6), a foam float (7), and a rubber float (8); the upper end of the guide rod (6) is fixed relative to the opening of the connecting channel facing the interior of the lower housing (3); The foam float (7) and the rubber float (8) are sleeved on the guide rod (6) and slide along the guide rod (6), with the foam float (7) located below the rubber float (8).

3. The high-reliability vacuum system according to claim 2, characterized in that: The floating enclosure mechanism also includes a fixed bracket (601) for fixing the guide rod (6). The fixed bracket (601) is fixed to the top of the lower housing (3) and fixed to the guide rod (6). The foam float (7) and the rubber float (8) are located inside the fixed bracket (601).

4. The high-reliability vacuum system according to claim 1, characterized in that: The upper vacuum tank (4) is equipped with a float switch (10), and the float of the float switch (10) is located on the lower middle section of the inner side wall of the upper vacuum tank (4).

5. The high-reliability vacuum system according to claim 1, characterized in that: Pressure gauges (11) and manual valves (12) connected to the vacuum pump are respectively installed on the upper and middle sections of the upper vacuum tank (4). The pressure gauge (11), manual valve (12) are connected to the interior of the upper vacuum tank (4).

6. The high-reliability vacuum system according to claim 1, characterized in that: A transparent observation window (13) is constructed on the side wall of the lower housing (3), and the transparent observation window (13) is configured in conjunction with the floating sealing mechanism.

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