Safe starting device of magnetic drive pump

Abstract

The utility model discloses a safe starting device of a magnetic drive pump, which comprises a magnetic drive pump body, the inlet end of the magnetic drive pump body is connected with an inlet valve through a pipeline, the outlet end of the magnetic drive pump body is connected with an outlet valve through a pipeline, a travel switch is additionally arranged on the inlet valve, and the travel switch is an explosion-proof travel switch. According to the scheme, the pump can be started only when the inlet valve is in the open position and the travel switch contact is in the open state (the shutdown loop is not conducted), and when the inlet valve is in the closed position or the opening degree is insufficient, the travel switch contact is in the closed state (the shutdown loop is conducted), the pump cannot be started, and the use safety of the magnetic drive pump body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic pumps, in particular to a safety starting device for a magnetic pump. Background Art

[0002] In fine chemical production, numerous toxic, hazardous, flammable, and explosive media are involved. To minimize the possibility of media leakage during unloading and transportation, magnetic pumps are often used for both unloading and delivery pumps. Due to the nature of magnetic pumps, the heat generated can only be removed by the flowing medium itself. If this heat cannot be removed promptly, many media can easily expand or react rapidly, causing explosions. Currently, many manufacturers use conventional globe valves or ball valves for the inlet and outlet valves of their magnetic pumps. If personnel inadvertently start the magnetic pump without opening the inlet valve, the pump will run idle without material, causing a sharp rise in pump temperature. If the inlet valve is opened again at this point, the heated medium entering the pump can easily expand or react rapidly, potentially causing an explosion and resulting in loss of life and property. Utility Model Content

[0003] The purpose of the utility model is to provide a safe starting device for a magnetic pump, which can solve the problem that if a person starts the magnetic pump without opening the inlet valve of the magnetic pump by mistake, the magnetic pump will run idle without material, resulting in a sharp rise in the temperature of the pump body. At this time, if the inlet valve is opened again, it is very likely that the volume of the medium entering the pump body will expand rapidly or react after being heated, thereby causing an explosion accident and resulting in loss of life and property.

[0004] To achieve the above object, a safe starting device for a magnetic pump is provided, comprising a magnetic pump body, wherein the inlet end of the magnetic pump body is connected to an inlet valve via a pipeline, the outlet end of the magnetic pump body is connected to an outlet valve via a pipeline, and the inlet valve is additionally equipped with a travel switch;

[0005] A buffer seat is provided at the bottom of the magnetic pump body, a buffer cavity is opened inside the buffer seat, damping spring shock absorbers are symmetrically provided inside the buffer cavity, connecting plates are symmetrically provided on both inner walls of the buffer seat, a connecting rod is fixedly connected between the two connecting plates, a buffer spring is provided on the outer surface of the connecting rod, a slider is fixedly connected to the upper end of the buffer spring, the slider is slidably connected to the outer surface of the connecting rod, and a connecting frame is fixedly connected to one side of the slider.

[0006] According to the safety starting device of the magnetic pump, the travel switch is an explosion-proof travel switch.

[0007] According to the safety starting device of a magnetic pump, the upper ends of the damping spring shock absorber and the connecting frame are fixedly connected to the lower end of the magnetic pump body.

[0008] Compared with the prior art, the beneficial effects of the present invention are:

[0009] 1. This kind of safety starting device for magnetic pump connects the starting conditions of the magnetic pump body to electrical control, effectively reducing accidents caused by human negligence.

[0010] 2. This kind of magnetic pump safety starting device, when the inlet valve is in the open position, the travel switch contacts are in the disconnected state (the shutdown circuit is not conductive), and the pump can be started. When the inlet valve is in the closed position or the opening is not enough, the travel switch contacts are in the closed state (the shutdown circuit is conductive), and the pump cannot be started, thereby improving the safety of the magnetic pump body.

[0011] 3. The safety starting device of the magnetic pump is provided with a damping spring shock absorber to reduce vibration when the magnetic pump body is working, thereby improving its stability and at the same time improving the connection stability with the pipeline.

[0012] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0014] Figure 1 It is a schematic diagram of a magnetic pump in the prior art;

[0015] Figure 2 This is a schematic diagram of a safety starting device for a magnetic pump according to the present invention, in which the inlet valve is not opened;

[0016] Figure 3 This is a schematic diagram of the inlet valve of a safety starting device for a magnetic pump of the utility model in an open state;

[0017] Figure 4 This diagram illustrates the structure of the base and buffer seat of a magnetic pump safety starting device according to the present invention. The diagram includes: 1. Magnetic pump body; 2. Inlet valve; 3. Outlet valve; 4. Travel switch; 5. Buffer seat; 6. Buffer chamber; 7. Damping spring shock absorber; 8. Connecting plate; 9. Connecting rod; 10. Buffer spring; 11. Slider; 12. Connecting frame. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the utility model.

[0019] See also Figure 1-4 The embodiment of the utility model provides a technical solution: a safe starting device for a magnetic pump, comprising a magnetic pump body 1, the inlet end of the magnetic pump body 1 is connected to an inlet valve 2 through a pipeline, the outlet end of the magnetic pump body 1 is connected to an outlet valve 3 through a pipeline, and a travel switch 4 is installed on the inlet valve 2, which is an explosion-proof travel switch.

[0020] A buffer seat 5 is provided at the bottom of the magnetic pump body 1, and a buffer cavity 6 is opened inside the buffer seat 5. A damping spring shock absorber 7 is symmetrically provided inside the buffer cavity 6. Connecting plates 8 are symmetrically provided on both inner walls of the buffer seat 5. A connecting rod 9 is fixedly connected between the two connecting plates 8. A buffer spring 10 is provided on the outer surface of the connecting rod 9. A slider 11 is fixedly connected to the upper end of the buffer spring 10. The slider 11 is slidably connected to the outer surface of the connecting rod 9. A connecting frame 12 is fixedly connected to one side of the slider 11. By arranging the connecting rod 9, the buffer spring 10, the slider 11 and the connecting frame 12, buffering is performed. The upper ends of the damping spring shock absorber 7 and the connecting frame 12 are fixedly connected to the lower end of the magnetic pump body 1. By arranging the damping spring shock absorber 7, shock absorption is performed when the magnetic pump body 1 is working, thereby improving its stability and at the same time improving the connection stability with the pipeline.

[0021] Working principle: During use, when the inlet valve 2 is in the closed position or the opening is not enough, the contacts of the travel switch 4 are in the passage state, the motor shutdown circuit is connected, and the pump cannot be started; when the inlet valve 2 is in the open position, the contacts of the travel switch 4 are in the disconnected state, the motor shutdown circuit does not receive the shutdown signal, and the pump is allowed to start; thereby ensuring that the inlet valve 2 is open when the pump is started, effectively avoiding the explosion accident caused by the rapid temperature rise caused by the idling of the magnetic pump body 1 without material, and the volume expansion when the dangerous material enters again; after the magnetic pump body 1 is started, the magnetic pump body 1 is damped by the damping spring shock absorber 7.

[0022] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A safe starting device for a magnetic pump, comprising a magnetic pump body (1), characterized in that: The inlet end of the magnetic pump body (1) is connected to an inlet valve (2) via a pipeline, the outlet end of the magnetic pump body (1) is connected to an outlet valve (3) via a pipeline, and a travel switch (4) is installed on the inlet valve (2); A buffer seat (5) is provided at the bottom of the magnetic pump body (1), a buffer cavity (6) is provided inside the buffer seat (5), a damping spring shock absorber (7) is symmetrically provided inside the buffer cavity (6), connecting plates (8) are symmetrically provided on both inner walls of the buffer seat (5), a connecting rod (9) is fixedly connected between the two connecting plates (8), a buffer spring (10) is provided on the outer surface of the connecting rod (9), a slider (11) is fixedly connected to the upper end of the buffer spring (10), the slider (11) is slidably connected to the outer surface of the connecting rod (9), and a connecting frame (12) is fixedly connected to one side of the slider (11).

2. A safe starting device for a magnetic pump according to claim 1, characterized in that: The travel switch (4) is an explosion-proof travel switch.

3. A safe starting device for a magnetic pump according to claim 1, characterized in that: The upper ends of the damping spring shock absorber (7) and the connecting frame (12) are fixedly connected to the lower end of the magnetic pump body (1).

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