Dry pumping prevention device of dissolving pump

Abstract

A dry pumping prevention device of a dissolution pump comprises a dissolution kettle body, a dissolution kettle outlet pipe is arranged on the dissolution kettle body and connected to a buffer tank inlet pipe at the top of a buffer tank body, and a buffer tank outlet pipe is arranged at the bottom of the side wall of the buffer tank body and connected to the dissolution pump; a tuning fork switch is arranged in the buffer tank body, and the tuning fork switch and the dissolving pump are both connected with the controller. With the adoption of the structure, the buffer tank and a related detection control mechanism are arranged, so that the dissolving pump can always work in the state of enough liquid, and the dry pumping phenomenon of the dissolving pump is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a dissolution pump anti-dry pumping device. Background Art

[0002] In chemical production, the dissolving pump is a key piece of equipment that transports materials from the dissolving kettle to subsequent processes. Existing dissolving pumps are installed directly below the dissolving kettle's discharge port. When the dissolving kettle is completely drained, if the pump is not stopped promptly, a "dry pumping" phenomenon occurs. The dissolving pump then runs idle, causing the pump to heat up rapidly, burning out the seals and, in severe cases, damaging other components such as the impeller. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a dissolution pump anti-dry pumping device, which aims to ensure that the dissolution pump always operates in a state with sufficient liquid by setting a buffer tank and related detection and control mechanisms, thereby avoiding the occurrence of dry pumping.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a dissolution pump anti-dry pumping device, comprising a dissolution kettle body, a dissolution kettle outlet pipe is provided on the dissolution kettle body, the dissolution kettle outlet pipe is connected to the buffer tank inlet pipe at the top of the buffer tank body, a buffer tank outlet pipe is provided at the bottom of the side wall of the buffer tank body, and the buffer tank outlet pipe is connected to the dissolution pump;

[0005] A tuning fork switch is provided in the buffer tank, and both the tuning fork switch and the dissolution pump are connected to the controller.

[0006] In a preferred solution, a residual material discharge port is provided at the bottom of the buffer tank body, a residual material discharge pipe is connected to the residual material discharge port, and the residual material discharge pipe is connected to the residual material temporary storage tank.

[0007] In a preferred solution, a vent pipe is provided on the top of the buffer tank.

[0008] In a preferred solution, a first discharge valve is provided on the outlet pipe of the dissolving kettle;

[0009] A second discharge valve is provided on the outlet pipe of the buffer tank;

[0010] The residual material discharge pipe is provided with a third discharge valve.

[0011] In a preferred solution, the minimum liquid level height set by the tuning fork switch is not lower than the height of the outlet pipe of the buffer tank.

[0012] The anti-dry pump device for a dissolving pump provided by the utility model has the following beneficial effects by adopting the above structure:

[0013] (1) By installing a tuning fork switch in the buffer tank and connecting it to the controller, when the liquid level in the buffer tank is lower than the preset value, the controller will automatically stop the operation of the dissolution pump. This design effectively prevents the dissolution pump from running in a liquid-free state, thereby greatly reducing the wear and damage to the pump body caused by dry pumping, extending the service life of the dissolution pump and reducing maintenance costs;

[0014] (2) The design of the buffer tank allows a certain amount of liquid to remain in the tank after the dissolving pump stops working, waiting to be used when it is started next time. This not only ensures that there is sufficient liquid supply when the pump starts, but also reduces the waste of resources caused by frequent additions. At the same time, the unused material is discharged into the temporary storage tank through the residual material discharge pipe and can be reused, further saving the cost of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] In the figure: dissolution kettle body 1, buffer tank body 2, buffer tank outlet pipe 3, buffer tank inlet pipe 4, residual material discharge port 5, vent pipe 6, dissolution pump 7, dissolution kettle outlet pipe 8, tuning fork switch 9, residual material temporary storage tank 10, residual material discharge pipe 11, first discharge valve 12, second discharge valve 13, third discharge valve 14. DETAILED DESCRIPTION

[0018] like Figure 1 A dissolving pump anti-dry pumping device includes a dissolving kettle body 1, a dissolving kettle body 1 is provided with a dissolving kettle outlet pipe 8, the dissolving kettle outlet pipe 8 is connected to the buffer tank inlet pipe 4 at the top of the buffer tank body 2, a buffer tank outlet pipe 3 is provided at the bottom of the side wall of the buffer tank body 2, and the buffer tank outlet pipe 3 is connected to the dissolving pump 7;

[0019] A tuning fork switch 9 is provided in the buffer tank 2 , and the tuning fork switch 9 and the dissolution pump 7 are both connected to a controller.

[0020] In a preferred solution, a residual material discharge port 5 is provided at the bottom of the buffer tank body 2 , the residual material discharge port 5 is connected to a residual material discharge pipe 11 , and the residual material discharge pipe 11 is connected to a residual material temporary storage tank 10 .

[0021] In a preferred solution, a vent pipe 6 is provided on the top of the buffer tank 2 .

[0022] In a preferred embodiment, a first discharge valve 12 is provided on the outlet pipe 8 of the dissolving kettle;

[0023] The buffer tank outlet pipe 3 is provided with a second discharge valve 13;

[0024] The residual material discharge pipe 11 is provided with a third discharge valve 14 .

[0025] In a preferred solution, the minimum liquid level height set by the tuning fork switch 9 is not lower than the height of the buffer tank outlet pipe 3.

[0026] The present invention discloses a device for preventing dry pumping of a dissolving pump, which is used to:

[0027] When the dissolving kettle body 1 completes the dissolution of the material, the first discharge valve 12 is opened to discharge the material in the dissolving kettle body 1. During the process, the material first enters the buffer tank body 2 until the liquid level of the material is higher than the input end height of the buffer tank outlet pipe 3. Then, the second discharge valve 13 is opened and the dissolving pump 7 is started at the same time. The dissolving pump 7 is used to transport the material continuously injected into the buffer tank body 2. During the whole process, the tuning fork switch 9 monitors the material liquid level. In the later stage of the feeding operation, the liquid level in the buffer tank body 2 gradually decreases. When the liquid level drops to the lowest liquid point set by the tuning fork switch 9 (the liquid level is still not lower than the buffer tank outlet pipe 3 at this time), the liquid level signal of the tuning fork switch 9 is transmitted to the controller, and the controller controls the dissolving pump 7 to shut down to avoid idling of the dissolving pump 7.

[0028] After completing the above operations, the excess material remaining in the buffer tank body 2 can be used as the material supply when the dissolution pump 7 is started next time. If the entire dissolution and conveying operation is completed, the third discharge valve 14 can be opened to naturally empty the remaining material in the buffer tank body 2 into the residual material temporary storage tank 10. The material in the residual material temporary storage tank 10 can be discharged through the discharge pipe at the bottom thereof or adsorbed into the material tank by negative pressure.

Claims

1. A dissolving pump anti-dry pumping device, comprising a dissolving kettle (1), characterized in that: The dissolving tank body (1) is provided with a dissolving tank outlet pipe (8), which is connected to the buffer tank inlet pipe (4) at the top of the buffer tank body (2); a buffer tank outlet pipe (3) is provided at the bottom of the side wall of the buffer tank body (2), and the buffer tank outlet pipe (3) is connected to the dissolving pump (7); A tuning fork switch (9) is provided in the buffer tank (2), and the tuning fork switch (9) and the dissolution pump (7) are both connected to the controller; The lowest liquid level height set by the tuning fork switch (9) is not lower than the height of the buffer tank outlet pipe (3).

2. The anti-dry pump device for a dissolving pump according to claim 1, characterized in that: The bottom of the buffer tank body (2) is provided with a residual material discharge port (5), the residual material discharge port (5) is connected to a residual material discharge pipe (11), and the residual material discharge pipe (11) is connected to the residual material temporary storage tank (10).

3. The anti-dry pump device of claim 1, characterized in that: A vent pipe (6) is provided on the top of the buffer tank (2).

4. The anti-dry pump device for a dissolving pump according to claim 2, characterized in that: The dissolving kettle outlet pipe (8) is provided with a first discharge valve (12); A second discharge valve (13) is provided on the outlet pipe (3) of the buffer tank; The residual material discharge pipe (11) is provided with a third discharge valve (14).

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