Full-automatic stable control system for vacuum water tank
By designing a fully automatic stability control system for vacuum sinks, the water level in the water tank is maintained by using multiple communication pipes and return mechanisms, the problem of vacuum sink pressure hysteresis is solved, the quality of the conduit is improved and the service life of the water pump is extended.
Patent Information
- Application Number
- CN202421996938.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-16
AI Technical Summary
In the prior art, the passage between the vacuum sink and the water tank is narrow, resulting in severe hysteresis of the pressure in the sink, making it difficult to reach the preset negative pressure range, affecting the quality of the conduit.
A vacuum sink fully automatic stability control system is designed, which connects the cooling water tank and the sink assembly through multiple communication pipes, and a return mechanism is set up, including vertical branch pipes, vertical rods, floating boxes and vertical grooves to ensure that the water level in the water tank remains stable and prevents pressure changes.
It achieves a rapid balance of negative pressure between the cooling water tank and the sink assembly, eliminates hysteresis, ensures that the negative pressure value in the sink is within the preset range, improves the quality of the conduit, and extends the service life of the water pump.
Smart Images
Figure CN223030329U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PVC conduit production, and particularly relates to a fully automatic stable control system for a vacuum water tank. Background Art
[0002] When producing PVC (or PU / PE) conduits, for some products, due to thin or thick wall thickness or other reasons, during conduit production, a vacuum water tank is required to be used in cooperation with equipment such as an extruder, a cooling water tank, and a traction cutting machine. Especially the vacuum water tank is a key device for the conduit to meet the process requirements. In the prior art, the vacuum water tank and the water tank are connected through a single pipeline, and the water tank is evacuated by a vacuum pump to make the water tank reach a vacuum. Due to the narrow channel between the water tank and the water tank, there is a serious lag phenomenon in the pressure inside the water tank, and it is often difficult to reach the preset negative pressure value range inside the water tank, thus affecting the quality of the conduit. Moreover, when the water level in the water tank suddenly changes, it will cause pressure changes and also affect the product quality. Therefore, the utility model proposes a fully automatic stable control system for a vacuum water tank. Summary of the Utility Model
[0003] The main purpose of the utility model is to provide a fully automatic stable control system for a vacuum water tank, which can quickly balance the pressure in the cooling water tank and the water tank assembly to prevent lag phenomenon, and through the reflux mechanism, keep a certain water level in the water tank to prevent the pressure change from affecting the product quality.
[0004] The utility model realizes the above purpose through the following technical solutions: a fully automatic stable control system for a vacuum water tank, including a cooling water tank, a control panel is arranged beside the cooling water tank, a water tank assembly is arranged above the cooling water tank, the water tank assembly is connected to the cooling water tank through a water inlet pipe and a water pump, a sizing sleeve is arranged inside the water tank assembly, a heat exchanger is arranged inside the cooling water tank, a negative pressure sensor is arranged inside the cooling water tank, a communication pipe is arranged between the water tank assembly and the cooling water tank, the cooling water tank is connected with a vacuum pump, a plurality of communication pipes are arranged, and a reflux mechanism for connecting the water tank and maintaining the water level in the water tank is connected to the water inlet pipe.
[0005] Preferably, the reflux mechanism includes a vertical branch pipe connecting the water tank, a vertical rod is slidably connected inside the branch pipe, a floating box is connected to the bottom end of the vertical rod, a sunken hole is arranged on the upper end surface of the vertical rod, and a plurality of vertical grooves are arranged on the top of the peripheral surface of the vertical rod along its axial direction and communicate with the sunken hole.
[0006] Preferably, a liquid level monitor is arranged inside the water tank assembly, and the liquid level monitor is connected to the control panel.
[0007] Preferably, air inlet valves are arranged on both the water tank assembly and the communication pipe.
[0008] The beneficial effects of the technical solution of the utility model are as follows:
[0009] A plurality of connecting pipes are connected between the cooling water tank and the water tank assembly. When the vacuum pump evacuates the cooling water tank, the negative pressure in the water tank assembly and the cooling water tank can quickly reach equilibrium, eliminating the lag phenomenon;
[0010] When all the water outlets of the water tank assembly are closed, the pressure of the water pump increases, the water level in the water tank decreases, the floating box descends, driving the vertical rod to descend, and the vertical groove is exposed outside the branch pipe. At this time, the branch pipe opens, and part of the water pumped into the water inlet pipe by the water pump flows back into the cooling water tank, preventing the water level in the water tank from being too low, keeping the water in the cooling water tank at a certain level, preventing pressure changes from causing product instability, and at the same time relieving the pressure of the water pump, preventing the water pump from burning out and prolonging the service life of the water pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is the layout diagram when the vacuum water tank full-automatic stable control system in the embodiment is working.
[0012] Figure 2 It is the structural schematic diagram of the reflux mechanism.
[0013] The numbers in the figure represent:
[0014] 1. Cooling water tank; 2. Water tank assembly; 3. Water inlet pipe; 4. Water pump; 5. Negative pressure sensor; 6. Connecting pipe; 7. Vacuum pump; 8. Branch pipe; 9. Vertical rod; 10. Floating box; 11. Counterbore; 12. Vertical groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] The present utility model will be further described in detail below with reference to specific embodiments.
[0016] Embodiment:
[0017] As Figure 1 and Figure 2As shown in the figure, a fully automatic stable control system for a vacuum water tank of the present utility model includes a cooling water tank 1. A control panel is provided beside the cooling water tank 1. A water tank assembly 2 is provided above the cooling water tank 1. The water tank assembly 2 is connected to the cooling water tank 1 through a water inlet pipe 3 and a water pump 4. A sizing sleeve is arranged inside the water tank assembly 2. A heat exchanger is arranged inside the cooling water tank 1. A negative pressure sensor 5 is arranged inside the cooling water tank 1. A communication pipe 6 is arranged between the water tank assembly 2 and the cooling water tank 1. The cooling water tank 1 is connected to a vacuum pump 7. A plurality of communication pipes 6 are arranged. A reflux mechanism for maintaining the water level in the water tank 1 and communicating with the water tank 1 is connected to the water inlet pipe 3. The reflux mechanism includes a vertical branch pipe 8 communicating with the water tank 1. A vertical rod 9 is slidably connected inside the branch pipe 8. A floating box 10 is connected to the bottom end of the vertical rod 9. A sunken hole 11 is arranged on the upper end surface of the vertical rod 9. A plurality of vertical grooves 12 arranged along its axial direction and communicating with the sunken hole 11 are arranged on the top of the circumferential surface of the vertical rod 9. The cooling water tank 1 is evacuated by the vacuum pump 7. A plurality of communication pipes 6 are connected between the cooling water tank 1 and the water tank assembly 2, so that the negative pressure in the water tank assembly 2 and the cooling water tank 1 quickly reaches equilibrium, eliminating the lag phenomenon. The negative pressure sensor 5 is used to monitor the negative pressure value to ensure that the negative pressure value in the water tank assembly 2 is within a preset range. The water pump 4 transports the water in the cooling water tank 1 into the water tank assembly 2. The extruded conduit is cooled and formed through the water tank assembly 2. At the beginning, the water levels in the cooling water tank 1 and the water tank assembly 2 are both in a balanced state. The vertical groove 12 on the vertical rod 9 is located inside the branch pipe 8, and the branch pipe 8 is in a closed state. As the cooling work progresses, the water in the water tank assembly 2 will be consumed. At this time, the water in the cooling water tank 1 needs to be replenished into the water tank assembly 2 through the water pump 4. When all the water outlets of the water tank assembly 2 are closed, the pressure of the water pump 4 increases, the water level in the water tank 1 decreases, the floating box 10 descends, driving the vertical rod 9 to descend, and the vertical groove 12 is exposed outside the branch pipe 8. At this time, the branch pipe 8 opens, and part of the water pumped into the water inlet pipe 3 by the water pump 4 flows back into the cooling water tank 1, preventing the water level in the water tank 1 from being too low, keeping the water in the cooling water tank 1 at a certain water level, preventing pressure changes from causing product instability, and at the same time relieving the pressure of the water pump 4 to prevent the water pump 4 from burning out; when the water level in the cooling water tank 1 is insufficient, the floating box 10 sinks to the bottommost part, and part of the water transported by the water pump 4 flows back to the cooling water tank 1. The water in the water tank cannot be replenished in time, and the water level decreases. An alarm is sent to the staff through a preset liquid level monitor and the control panel for timely water replenishment.
[0018] Liquid level monitors are arranged inside both the water tank assembly 2 and the cooling water tank 1, and the liquid level monitors are connected to the control panel.
[0019] An air inlet valve is provided on both the water tank assembly 2 and the communicating pipe 6.
[0020] The above are only some embodiments of the present utility model. For those of ordinary skill in the art, without departing from the inventive concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model.
Claims
1. A vacuum water tank fully automatic stable control system, comprising a cooling water tank, a control panel is provided on one side of the cooling water tank, a water tank assembly is provided above the cooling water tank, the water tank assembly is connected to the cooling water tank through a water inlet pipe and a water pump, a sizing sleeve is provided in the water tank assembly, a heat exchanger is provided in the cooling water tank, a negative pressure sensor is provided in the cooling water tank, a connecting pipe is provided between the water tank assembly and the cooling water tank, and the cooling water tank is connected to a vacuum pump, characterized in that: The connecting pipes are provided in plurality, and the water inlet pipe is connected with a reflux mechanism connected with the water tank and used for maintaining the water level in the water tank.
2. The fully automatic stable control system of a vacuum water tank according to claim 1, characterized in that: The reflux mechanism includes a vertically arranged branch pipe connected to the water tank, a vertical rod is slidably connected to the branch pipe, the bottom end of the vertical rod is connected to a float box, the upper end surface of the vertical rod is provided with a countersunk hole, and the top of the circumference of the vertical rod is provided with a plurality of vertical grooves arranged along its axial direction and connected to the countersunk hole.
3. The fully automatic stable control system of a vacuum water tank according to claim 1, characterized in that: A liquid level monitor is provided in the water tank assembly, and the liquid level monitor is connected to the control panel.
4. The fully automatic stable control system of a vacuum water tank according to claim 1, characterized in that: The water tank assembly and the connecting pipe are both provided with air intake valves.