Vacuumizing system with automatic start-stop function

Abstract

The utility model relates to the technical field of pharmaceutical equipment, in particular to a vacuumizing system with an automatic start-stop function, which comprises a water ring vacuum pump, a vacuum tank and a water storage tank, the water ring vacuum pump is provided with a cooling water inlet, a discharge outlet and an air suction port, the vacuum tank is connected with an air suction pipeline, and the air suction port of the water ring vacuum pump is connected to the air suction pipeline; a circulating water inlet pipe is installed at the bottom of the water storage tank and connected with a cooling water inlet of the water ring vacuum pump, a discharge outlet of the water ring vacuum pump is connected to the top of the water storage tank through a circulating water return pipe, and a vacuum electric contact pressure gauge is arranged on the vacuum tank and connected with an alternating current contactor. The alternating current contactor is electrically connected with the water ring vacuum pump and used for controlling starting and stopping of the water ring vacuum pump, the automatic starting and stopping function of the whole vacuumizing system is achieved, the water ring vacuum pump can be prevented from being overused, equipment abrasion is reduced, the service life of the water ring vacuum pump is prolonged, and maintenance cost and production interruption risks are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pharmaceutical equipment, in particular to a vacuum pumping system with automatic start and stop functions. Background Art

[0002] Pharmaceutical production lines use many types of equipment. In order to ensure the safety of pharmaceutical production, various equipment needs to operate under different conditions. For example, some equipment has very high requirements for vacuum during operation, so a vacuum system is needed to evacuate the equipment.

[0003] At present, in the commonly used vacuum extraction system, the structure mainly includes a vacuum tank and a vacuum pump. When in use, the vacuum tank is connected to the equipment to be vacuumed through a pipeline, and the vacuum tank is vacuumed by a vacuum pump, and the vacuum tank is used to store vacuum. However, since the vacuum pump will generate heat during operation, it is necessary to cool the vacuum pump. There are many ways to cool the vacuum pump. The most common one is to use a water ring vacuum pump and use cooling water for circulating cooling. Specifically, a water ring vacuum pump cooling water recycling energy-saving device with a patent with announcement number CN216342798U includes a water ring vacuum pump, a cooling water storage tank and an air-cooled chiller. The water ring vacuum pump includes a discharge port and a cooling water inlet. The discharge port is connected to the cooling water storage tank through a pipeline, and the cooling water storage tank is connected to the air-cooled chiller through a pipeline. The air-cooled chiller is connected to the cooling water inlet through a cooling water pipeline.

[0004] However, in the above-mentioned prior art, when the vacuum tank is evacuated by the water ring vacuum pump, the water ring vacuum pump cannot be automatically shut down after the vacuum tank reaches a certain vacuum degree, resulting in the water ring vacuum pump being in operation all the time, and the purpose of automatic operation of the water ring vacuum pump cannot be achieved. Utility Model Content

[0005] The main purpose of the utility model is to provide a vacuum pumping system with automatic start and stop functions, aiming to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, the utility model proposes a vacuum pumping system with automatic start and stop function, including a water ring vacuum pump, a vacuum tank and a water storage tank, the water ring vacuum pump is provided with a cooling water inlet, a discharge port and an air suction port, the vacuum tank is connected with an air suction pipe, and the air suction port of the water ring vacuum pump is connected to the air suction pipe; a circulating water inlet pipe is installed at the bottom of the water storage tank, the circulating water inlet pipe is connected to the cooling water inlet of the water ring vacuum pump, the discharge port of the water ring vacuum pump is connected to the top of the water storage tank through a circulating water return pipe, a vacuum electric contact pressure gauge is arranged on the vacuum tank for detecting the pressure in the vacuum tank, the vacuum electric contact pressure gauge is connected to the AC contactor, and the AC contactor is electrically connected to the water ring vacuum pump.

[0007] Preferably, the vacuum electric contact pressure gauge is an HC-Z810 digital vacuum electric contact pressure gauge.

[0008] Preferably, a water inlet pipe is connected to the upper part of the water storage tank, the water inlet end of the water inlet pipe is connected to a water source, the water outlet of the water inlet pipe extends into the interior of the water storage tank, and a float valve is arranged on the water outlet of the water inlet pipe.

[0009] Preferably, a drain pipe is connected to the water tank, a water inlet end of the drain pipe extends into the interior of the water tank near the bottom wall, and a water pump is provided on the drain pipe.

[0010] Preferably, a thermostat is provided on the water tank, and a temperature sensor is provided on the thermostat for monitoring the temperature of the water inside the water tank; the thermostat is electrically connected to the water pump.

[0011] Preferably, the thermostat is arranged on the top of the water tank, and the temperature sensor extends downward into the water inside the water tank.

[0012] Preferably, the number of the water ring vacuum pumps is three, the suction ports of the three water ring vacuum pumps are connected in parallel to the suction pipe; the cooling water inlets of the three water ring vacuum pumps are connected in parallel to the circulating water inlet pipe; and the discharge ports of the three water ring vacuum pumps are connected in parallel to the circulating water return pipe.

[0013] Preferably, the internal height of the water tank is H, and the distance between the float valve and the bottom wall of the water tank is h, and the two satisfy:

[0014] Preferably, a filter screen is provided at the water inlet end of the circulating water inlet pipe, and the filter screen is fixedly mounted on the inner wall of the water storage tank.

[0015] Preferably, the model of the AC contactor is Schneider LC1D25M7.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the utility model are as follows:

[0017] (1) In the utility model, a vacuum electric contact pressure gauge is provided on the vacuum tank for detecting the pressure inside the vacuum tank, and the vacuum electric contact pressure gauge is connected to an AC contactor, which is electrically connected to a water ring vacuum pump for controlling the start and stop of the water ring vacuum pump, thereby realizing the automatic start and stop function of the entire vacuum pumping system.

[0018] (2) In the present invention, by adopting the form of three water ring vacuum pumps connected in parallel, firstly, the vacuuming power can be increased, and secondly, when one of the water ring vacuum pumps fails, the other two water ring vacuum pumps can still operate normally, thereby ensuring the stability of the operation of the entire vacuuming system and reducing the risk of production interruption.

[0019] (3) In the present invention, a drain pipe is connected to the water tank, and the water inlet end of the drain pipe extends into the water tank near the bottom wall. A water pump is provided on the drain pipe, and the start and stop of the water pump is controlled by a thermostat. When the temperature sensor on the thermostat detects that the water temperature is too high, the water pump can be started to drain water. When the water level drops to the normal level, the float valve opens to realize the automatic water replenishment function.

[0020] (4) In the present invention, since the vacuum electric contact pressure gauge is electrically connected to the water ring vacuum pump to realize the automatic start and stop function, the overuse of the water ring vacuum pump can be avoided, the wear of the equipment can be reduced, the service life can be extended, the maintenance cost and the risk of production interruption can be reduced. In addition, the unattended operation of the vacuum system can be realized, the production efficiency and response speed can be improved, and the errors of manual intervention can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a structural diagram of the vacuum pumping system with automatic start and stop functions proposed by the utility model.

[0023] Explanation of the accompanying figures: 1. Water ring vacuum pump; 2. Vacuum tank; 3. Water storage tank; 3a. Circulating water inlet pipe; 3b. Circulating water return pipe; 4. Vacuum electric contact pressure gauge; 5. Water inlet pipe; 6. Drain pipe; 7. Float valve; 8. Water pump; 9. Thermostat; 10. Filter. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] Combination Figure 1 As shown, a vacuum pumping system with automatic start and stop function includes a water ring vacuum pump 1, a vacuum tank 2 and a water storage tank 3. The water ring vacuum pump 1 is provided with a cooling water inlet, a discharge port and an air suction port. The vacuum tank 2 is connected with an air suction pipe 2a, and the air suction port of the water ring vacuum pump 1 is connected to the air suction pipe 2a; a circulating water inlet pipe 3a is installed at the bottom of the water storage tank 3, and the circulating water inlet pipe 3a is connected to the cooling water inlet of the water ring vacuum pump 1. The discharge port of the water ring vacuum pump 1 is connected to the top of the water storage tank 3 through a circulating water return pipe 3b. A vacuum electric contact pressure gauge 4 is arranged on the vacuum tank 2, and the vacuum electric contact pressure gauge 4 is connected to the AC contactor 11. The AC contactor 11 is electrically connected to the water ring vacuum pump 1, and is used to control the start and stop of the water ring vacuum pump 1, thereby realizing the automatic start and stop function of the entire vacuum pumping system. Specifically, the vacuum electric contact pressure gauge 4 is a HC-Z810 digital vacuum electric contact pressure gauge, which monitors the pressure inside the vacuum tank 2. When the pressure reaches the set value, the vacuum electric contact pressure gauge 4 sends a command to the AC contactor 11 to shut down the water ring vacuum pump 1. When the pressure is lower than the set value, the vacuum electric contact pressure gauge 4 sends a command to the AC contactor 11 to start the water ring vacuum pump 1, thereby achieving the purpose of automatic control.

[0027] A water inlet pipe 5 is connected to the upper part of the water storage tank 3, and the water inlet end of the water inlet pipe 5 is connected to a water source. Specifically, the water inlet end of the water inlet pipe 5 can be connected to a tap water pipe as a water source, and the water inlet end of the water inlet pipe 5 can also be connected to a cooling water tank as a water source. The water outlet of the water inlet pipe 5 extends into the interior of the water storage tank 3, and a float valve 8 is arranged on the water outlet of the water inlet pipe 5. In the process of cooling the water ring vacuum pump 1, a very small amount of water will evaporate and consume the cooling water. When the water level is lower than the normal water level, the automatic water replenishment function is realized by using the float valve 8 to keep the water storage tank 3 in a normal water level state.

[0028] A drain pipe 6 is connected to the water tank 3, and the water inlet end of the drain pipe 6 extends into the water tank 3 near the bottom wall. A water pump 8 is provided on the drain pipe 6. When the water in the water tank 3 needs to be removed for replacement, the water pump 8 is started to pump water. In addition, a thermostat 9 is provided on the water tank 3, and the thermostat 9 is provided with a temperature sensor 9a for monitoring the temperature of the water inside the water tank 3; the thermostat 9 is electrically connected to the water pump 8. When the temperature sensor 9a detects that the water temperature is higher than the set value, the thermostat 9 starts the water pump 8 to discharge the high-temperature water in the water tank 3. This ensures that the water temperature in the water tank 3 is within the set range.

[0029] Combination Figure 1As shown, the water tank 3 used in this embodiment is a rectangular water tank, the temperature controller 9 is arranged on the top of the water tank 3, and the temperature sensor 9a extends downward into the water body inside the water tank 3.

[0030] Combination Figure 1 As shown, there are three water ring vacuum pumps 1, and the air intakes of the three water ring vacuum pumps 1 are connected in parallel to the air intake pipe 2a; the cooling water inlets of the three water ring vacuum pumps 1 are connected in parallel to the circulating water inlet pipe 3a; the discharge ports of the three water ring vacuum pumps 1 are connected in parallel to the circulating water return pipe 3b. By adopting the form of three water ring vacuum pumps 1 connected in parallel, firstly, the vacuuming power can be increased, and secondly, when one of the water ring vacuum pumps 1 fails, the other two water ring vacuum pumps 2 can still operate normally, thereby ensuring the stability of the operation of the entire vacuuming system and reducing the risk of production interruption.

[0031] Combination Figure 1 As shown, the internal height of the water tank 3 is H, and the distance between the float valve 8 and the bottom wall of the water tank 3 is h, and the two satisfy: The height of the float valve 8 is set to maintain the normal water level.

[0032] Furthermore, a filter screen 10 is provided at the water inlet end of the circulating water inlet pipe 3a, and the filter screen 10 is fixedly mounted on the inner wall of the water storage tank 3. The purpose of providing the filter screen 10 is to prevent debris in the water from entering the water ring vacuum pump 1.

[0033] In this embodiment, the model of the AC contactor 11 is Schneider LC1D25M7.

[0034] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made under the concept of the present invention using the contents of the specification and drawings of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A vacuum pumping system with an automatic start-stop function, comprising a water ring vacuum pump (1), a vacuum tank (2) and a water storage tank (3), wherein the water ring vacuum pump (1) is provided with a cooling water inlet, a discharge port and an air suction port, the vacuum tank (2) is connected with an air suction pipe (2a), and the air suction port of the water ring vacuum pump (1) is connected to the air suction pipe (2a); a circulating water inlet pipe (3a) is installed at the bottom of the water storage tank (3), the circulating water inlet pipe (3a) is connected to the cooling water inlet of the water ring vacuum pump (1), and the discharge port of the water ring vacuum pump (1) is connected to the top of the water storage tank (3) through a circulating water return pipe (3b), characterized in that: A vacuum electric contact pressure gauge (4) is provided on the vacuum tank (2) for detecting the pressure in the vacuum tank (2); the vacuum electric contact pressure gauge (4) is connected to an AC contactor (11); and the AC contactor (11) is electrically connected to a water ring vacuum pump (1).

2. A vacuum pumping system with automatic start and stop function as claimed in claim 1, characterized in that: The vacuum electric contact pressure gauge (4) is a HC-Z810 digital vacuum electric contact pressure gauge.

3. A vacuum pumping system with automatic start and stop function as claimed in claim 1, characterized in that: A water inlet pipe (5) is connected to the upper part of the water storage tank (3), the water inlet end of the water inlet pipe (5) is connected to a water source, the water outlet of the water inlet pipe (5) extends into the interior of the water storage tank (3), and a float valve (7) is arranged on the water outlet of the water inlet pipe (5).

4. A vacuum pumping system with automatic start and stop function as claimed in claim 1, characterized in that: A drainage pipe (6) is connected to the water storage tank (3), the water inlet end of the drainage pipe (6) extends into the water storage tank (3) near the bottom wall, and a water pump (8) is arranged on the drainage pipe (6).

5. A vacuum pumping system with automatic start and stop function as claimed in claim 4, characterized in that: A thermostat (9) is arranged on the water storage tank (3), and a temperature sensor (9a) is provided on the thermostat (9) for monitoring the temperature of the water inside the water storage tank (3); the thermostat (9) is electrically connected to the water pump (8).

6. A vacuum pumping system with automatic start and stop function as claimed in claim 5, characterized in that: The temperature controller (9) is arranged on the top of the water storage tank (3), and the temperature sensor (9a) extends downward into the water body inside the water storage tank (3).

7. A vacuum pumping system with automatic start and stop function as claimed in claim 1, characterized in that: The number of the water ring vacuum pumps (1) is three; the air intake ports of the three water ring vacuum pumps (1) are connected in parallel to the air intake pipe (2a); the cooling water inlets of the three water ring vacuum pumps (1) are connected in parallel to the circulating water inlet pipe (3a); and the discharge ports of the three water ring vacuum pumps (1) are connected in parallel to the circulating water return pipe (3b).

8. A vacuum pumping system with automatic start and stop function as claimed in claim 3, characterized in that: The internal height of the water tank (3) is H, and the distance between the float valve (7) and the bottom wall of the water tank (3) is h, and the two satisfy:

9. A vacuum pumping system with automatic start and stop function as claimed in claim 1, characterized in that: A filter screen (10) is provided at the water inlet end of the circulating water inlet pipe (3a), and the filter screen (10) is fixedly mounted on the inner wall of the water storage tank (3).

10. A vacuum pumping system with automatic start and stop function as claimed in claim 1, characterized in that: The model of the AC contactor (11) is Schneider LC1D25M7.

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