Automatic start-stop device for sweeping pump of coal preparation plant
By adopting a combination design of float ball and probe rod in the sweeping pump in the coal preparation plant, the electrodes are avoided from contacting sewage directly, and the problem of high failure rate of existing devices is solved, and the automatic start-stop and maintenance cost savings of the sweeping pump are achieved.
Patent Information
- Application Number
- CN202420171233.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-01-24
AI Technical Summary
The automatic start-stop device of the existing coal preparation plant sweeping pump contains grease and coal sludge and other debris, causing frequent electrode corrosion and failure, and the normal automatic start-stop function cannot be achieved. The failure rate is high and requires frequent maintenance.
Design an automatic start-stop device, using a combination of float ball and probe rod, which float ball floats on the liquid surface, and contacts are provided on the probe rod. The contact controls the start-stop of the sweeping pump through the proximity switch to prevent the electrode from directly contacting the water body. , reduce the occurrence of electrical control failures.
The complete automatic start-stop function of the sweeping pump is realized, which reduces maintenance costs, avoids equipment damage and sewage discharge accidents, and improves the reliability of the device.
Smart Images
Figure CN222254275U_ABST
Abstract
Description
[Technical field]
[0001] The utility model belongs to the technical field of wastewater treatment in coal preparation plants, and in particular relates to an automatic start-stop device for a sweeping pump in a coal preparation plant. [Background technology]
[0002] The sweeping pump of the coal preparation plant is generally used in the recovery and treatment of wastewater containing industrial sludge in the filter press underflow pump room. The existing control method for the sweeping pump is to use the water conductivity principle electrode control, and the sweeping pump is designed to have an automatic start and stop function; however, in actual operation, since the sewage contains a large amount of grease, coal slime, and flocculent debris, it will cause electrode point corrosion or electrode closure, resulting in frequent failures of the pump's automatic start and stop device and the inability to start automatically, or the phenomenon of idling all the time, resulting in a high failure rate, and it is impossible to truly achieve automatic start and stop and maintenance-free. [Contents of the utility model]
[0003] The utility model aims to provide an automatic start and stop device for a sweeping pump in a coal preparation plant, so as to solve the problem that the existing sweeping pump cannot maintain normal automatic start and stop.
[0004] The utility model adopts the following technical scheme: an automatic start-stop device for a sweeping pump in a coal preparation plant, comprising a support vertically arranged outside a pump pit; two support frames are arranged at intervals above and below the top of the vertical support, and a through hole is arranged on each of the two support frames, and the two through holes are coaxial;
[0005] An upper proximity switch and a lower proximity switch are provided on the pillar, below the support frame, and at intervals above and below;
[0006] A floating ball is arranged in the pump pit, and a vertically arranged probe rod is connected to the top of the floating ball, and the top of the probe rod passes through the through holes of the two support frames; a contact is arranged on the probe rod;
[0007] The float is used to float on the liquid surface in the pump pit and move up and down with the rise and fall of the liquid surface; the probe rod is used to follow the movement of the float and to trigger a signal to start the sweeping pump when the contact approaches the upper proximity switch; and to trigger a signal to close the sweeping pump when the contact approaches the lower proximity switch; the sweeping pump is used to suck the liquid in the pump pit.
[0008] Furthermore, upper contacts and lower contacts are provided at intervals above and below the probe rod; the upper contact is used to trigger a signal to start the sweeping pump when it approaches the upper proximity switch; the lower contact is used to trigger a signal to shut down the sweeping pump when it approaches the lower proximity switch.
[0009] Furthermore, the float is a hollow stainless steel ball with a diameter of 30 cm to 50 cm.
[0010] The beneficial effects of the utility model are as follows: the utility model changes the original design concept, completely separates the automatic start-stop device from the water body as a conductor, and uses the design concept of a float plus a probe rod to set the electrode contact at a high altitude, thereby avoiding electrical control failures caused by long-term contact of the contact with oil or water debris, so that the sweeping pump can completely achieve maintenance-free and automatic start-stop functions, saving workers' inspection and maintenance costs, and avoiding equipment damage or sewage discharge accidents caused by start-stop failures.
Brief Description of the Drawings
[0011] Figure 1 This is a diagram of an automatic start and stop device for a sweeping pump in a coal preparation plant according to the utility model;
[0012] Figure 2 The utility model is a schematic diagram of the state when the lower contact 4 of the automatic start and stop device for the sweeping pump of the coal preparation plant is close to the lower proximity switch 6.
[0013] Among them, 1. float, 2. probe rod, 3. upper contact, 4. lower contact, 5. upper proximity switch, 6. lower proximity switch, 7. pump pit, 8. pillar, 9. support frame. [Specific implementation method]
[0014] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.
[0015] The utility model provides an automatic start-stop device for a sweeping pump in a coal preparation plant. Figure 1 As shown, it includes a support 8 vertically arranged outside the pump pit 7; two support frames 9 are arranged at intervals on the top of the vertical support 8, and each of the two support frames 9 is provided with a through hole, and the two through holes are coaxial;
[0016] On the pillar 8, below the support frame 9, an upper proximity switch 5 and a lower proximity switch 6 are provided at intervals above and below;
[0017] A floating ball 1 is arranged in the pump pit 7, and a vertically arranged probe rod 2 is connected to the top of the floating ball 1, and the top of the probe rod 2 passes through the through holes of the two support frames 9; a contact is arranged on the probe rod 2;
[0018] The float 1 is used to float on the liquid surface in the pump pit 7 and move up and down with the rise and fall of the liquid surface. Figure 1 As shown, the probe rod 2 is used to follow the movement of the float 1 and to trigger a signal to start the sweeping pump when the contact approaches the upper proximity switch 5. Figure 2 As shown, the probe rod 2 is used to follow the movement of the float 1 and to trigger a signal to close the sweeping pump when the contact approaches the lower proximity switch 6. The sweeping pump is used to suck the liquid in the pump pit 7.
[0019] In some embodiments, an upper contact 3 and a lower contact 4 are provided at intervals on the upper and lower parts of the probe rod 2; the upper contact 3 is used to trigger a signal to turn on the sweeping pump when it is close to the upper proximity switch 5; the lower contact 4 is used to trigger a signal to turn off the sweeping pump when it is close to the lower proximity switch 6. Providing two contacts, namely the upper contact 3 and the lower contact 4, can shorten the length of the probe rod 2, reduce costs, and simplify the structure compared to providing only one contact.
[0020] In some embodiments, the float 1 is a hollow stainless steel ball with a diameter of φ30cm to φ50cm. The float is made of stainless steel to prevent rust damage. The diameter is set to φ30cm to φ50cm to increase buoyancy and prevent debris from attaching to the probe rod and affecting the floating effect.
[0021] The utility model discloses a method for using an automatic start-stop device for a sweeping pump in a coal preparation plant: a float floats on the surface of the liquid in the pump pit. When the water level in the pump pit rises, the float rises together with the probe rod, and the upper contact contacts the upper proximity switch, indicating that the water level in the pump pit has reached the upper limit. At this time, a signal is transmitted to the controller through the upper proximity switch, and the sweeping pump is started to start pumping water. After pumping water for a period of time, the water level drops to the point where the lower contact on the probe rod contacts the lower proximity switch, indicating that the water level in the pump pit has reached the lower limit. At this time, a signal is transmitted to the controller through the lower proximity switch, and the sweeping pump is closed to stop pumping water.
Claims
1. An automatic start-stop device for a sweeping pump in a coal preparation plant, characterized in that: It comprises a support (8) vertically arranged outside the pump pit (7); two support frames (9) are arranged vertically on the top of the support (8) and spaced apart from each other, and each of the two support frames (9) is provided with a through hole, and the two through holes are coaxial; An upper proximity switch (5) and a lower proximity switch (6) are provided on the pillar (8) and below the support frame (9) at intervals therebetween; A floating ball (1) is arranged in the pump pit (7), the top of the floating ball (1) is connected to a vertically arranged probe rod (2), the top of the probe rod (2) passes through the through holes of the two support frames (9); a contact is arranged on the probe rod (2); The float (1) is used to float on the liquid surface in the pump pit (7) and move up and down as the liquid surface rises and falls; the probe (2) is used to follow the movement of the float (1) and to trigger a signal to turn on the sweeping pump when the contact approaches the upper proximity switch (5); and to trigger a signal to turn off the sweeping pump when the contact approaches the lower proximity switch (6); the sweeping pump is used to suck the liquid in the pump pit (7).
2. The automatic start-stop device for a sweeping pump in a coal preparation plant according to claim 1, characterized in that: An upper contact (3) and a lower contact (4) are provided on the probe rod (2) at intervals above and below; the upper contact (3) is used to trigger a signal to turn on the sweeping pump when the upper contact (3) is close to the upper proximity switch (5); and the lower contact (4) is used to trigger a signal to turn off the sweeping pump when the lower contact (4) is close to the lower proximity switch (6).
3. An automatic start-stop device for a sweeping pump in a coal preparation plant as claimed in claim 1 or 2, characterized in that: The floating ball (1) is a hollow stainless steel ball with a diameter of 30 cm to 50 cm.