Mechanical seal cooling water start-stop control system

Abstract

The utility model discloses a mechanical seal cooling water start-stop control system which comprises a control end and a circulating water pool, the circulating water pool is provided with a mechanical seal cooling water inlet pipeline and a mechanical seal cooling water outlet pipeline, and a spoke type weighing sensor is arranged at the bottom of the circulating water pool. Valves are arranged on the mechanical seal cooling water inlet pipeline and the mechanical seal cooling water drainage pipeline, and the control end controls opening and closing of the mechanical seal cooling water inlet pipeline and the mechanical seal cooling water drainage pipeline through electric signals of the spoke type weighing sensor. According to the mechanical seal cooling water start-stop control system, the situation of water storage in a circulating water pool is judged in a weighing mode, input of mechanical seal cooling water is controlled through a weighing numerical value, an air pump enables air pressure in the circulating water pool to be balanced through an electric signal of a pressure sensor, meanwhile, air is compressed, and the air concentration is increased; therefore, the leakage of harmful gas can be detected by the gas sensor, and the leakage of the medium through the circulating cooling water can be prevented from two aspects of sealing performance and gas detection.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of mechanical cooling equipment technical field, specifically a kind of machine seal cooling water start-stop control system. BACKGROUND

[0002] Machine seal cooling water, i.e. mechanical seal cooling water, is mainly used for cooling and lubricating mechanical seal devices, etc. The machine seal cooling water system is an important auxiliary system for ensuring the normal operation of mechanical seals. For some media that are easily vaporized at high temperatures, such as high-temperature hydrocarbon media in the petroleum and chemical industry, the temperature rise at the machine seal may cause the media to vaporize near the sealing surface, forming a vapor film that destroys the integrity of the seal and causes leakage. Machine seal cooling can reduce the temperature of the medium, prevent its vaporization, and ensure the sealing performance. At the same time, in some special working conditions, such as media with corrosive and toxic properties, cooling water can play a role in isolating the medium, preventing the medium from leaking into the environment, and protecting the environment and personnel safety.

[0003] Sealing components of mechanical equipment, such as sealing rings and sealing pads, may age and wear out after long-term use, leading to a decrease in sealing performance. The sealing components in the machine seal cooling water system may also age, which may cause the medium of the equipment to enter the cooling water, and as the cooling water circulates, it may cause safety hazards. To improve the safety of equipment operation, technical improvements are made to existing equipment to improve the safety of the machine seal cooling water system. SUMMARY

[0004] The purpose of the utility model is to provide a machine seal cooling water start-stop control system to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] A machine seal cooling water start-stop control system includes a control end and a circulating water pool. The circulating water pool is provided with a machine seal cooling water inlet pipeline and a machine seal cooling water outlet pipeline. The bottom of the circulating water pool is provided with a spoke type weighing sensor. Valves are arranged on the machine seal cooling water inlet pipeline and the machine seal cooling water outlet pipeline. The control end controls the opening and closing of the machine seal cooling water inlet pipeline and the machine seal cooling water outlet pipeline through the electrical signal of the spoke type weighing sensor.

[0007] As a further scheme of the utility model: a buffer tank is arranged on the machine seal cooling water inlet pipeline.

[0008] As a further scheme of the utility model: the circulating water pool is further connected with a gas phase separation pipeline. The other end of the gas phase separation pipeline is connected with a gas detection tank. The gas detection tank is provided with a gas sensor and a gas output pipeline. The gas sensor is electrically connected with the control end.

[0009] As a further scheme of the utility model: the gas phase separation pipeline is provided with a gas pump, and a direct connection pipeline is further provided on the gas phase separation pipeline and is connected with the gas pump in parallel, and valves for controlling the gas path are arranged on both sides of the gas pump and the direct connection pipeline.

[0010] As a further scheme of the utility model: the inside of the circulating water pool is provided with a pressure sensor, and the control end controls the power of the gas pump through the electric signal of the pressure sensor.

[0011] As a further scheme of the utility model: the machine seal cooling water drainage pipeline is provided with a control valve and a discharge pipeline connected with the control valve in parallel, and a liquid pump for discharging the cooling water to the circulating water pool is arranged on the discharge pipeline.

[0012] As a further scheme of the utility model: the control end controls the liquid pump, the control valve and the valve arranged on the machine seal cooling water inlet pipeline through the electric signal detected by the spoke type weighing sensor.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] The machine seal cooling water start-stop control system judges the water storage condition in the circulating water pool through the weighing mode, controls the input of the machine seal cooling water through the weighing value, and the gas pump balances the internal pressure of the circulating water pool through the electric signal of the pressure sensor, simultaneously compresses the gas to improve the gas concentration, so that the harmful gas leakage is detected by the gas sensor, and the medium leakage through the circulating cooling water is prevented from the two aspects of the sealing property and the gas detection. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of a machine seal cooling water start-stop control system.

[0016] In the drawing: 1, circulating water pool; 2, machine seal cooling water inlet pipeline; 3, machine seal cooling water drainage pipeline; 4, spoke type weighing sensor; 5, gas phase separation pipeline; 6, gas pump; 7, gas detection tank; 8, gas output pipeline; 9, direct connection pipeline; 10, gas sensor; 11, pressure sensor; 12, discharge pipeline; 13, control liquid pump; 14, buffer tank. DETAILED DESCRIPTION

[0017] Please refer to Figure 1The utility model discloses an embodiment of a kind of machine seal cooling water start-stop control system, including control end and circulating water pool 1, circulating water pool 1 is provided with machine seal cooling water inlet pipeline 2 and machine seal cooling water drainage pipeline 3, the bottom of circulating water pool 1 is provided with spoke type load cell 4, machine seal cooling water inlet pipeline 2 and machine seal cooling water drainage pipeline 3 are all provided with valve, control end is through the electrical signal of spoke type load cell 4 control machine seal cooling water inlet pipeline 2 and the opening and closing of machine seal cooling water drainage pipeline 3, conventional circulating water pool 1 passes through float switch or liquid level sensor and so on Equipment, detect the water level height in circulating water pool 1, this mode maintenance is very difficult, need to set manhole door, manually join overhauls, the more window that circulating water pool 1 opens, the sealing property of appointment equipment is influenced, lead to harmful gas leakage, the present application utilizes spoke type load cell 4 to detect circulating water pool 1 weight, circulating water pool 1 is 20 cubic meters, after circulating water is added, full load is less than 20 tons, so set value, when the weight compared to empty load that spoke type load cell 4 detects rises in 15-18 tons, the valve on machine seal cooling water drainage pipeline 3 opens, circulating water is sent out and enters circulating water membrane pool, so that circulating water pool 1 is in full closed state, avoid to participate in circulating cooling water medium leakage, improve the sealing property of equipment.

[0018] In a preferred embodiment, the machine seal cooling water inlet pipeline 2 is provided with a buffer tank 14.

[0019] In a preferred embodiment, the circulating water pool 1 is also connected with a gas phase separation pipeline 5, the other end of the gas phase separation pipeline 5 is connected with a gas detection tank 7, the gas detection tank 7 is provided with a gas sensor 10 and a gas output pipeline 8, the gas sensor 10 is electrically connected with the control end, because the circulating water pool 1 is in a closed state, therefore, when the circulating cooling water enters the circulating water pool 1, the air pressure in the circulating water pool 1 increases, therefore, with the entering of the circulating cooling water into the circulating water pool 1, the gas is sent to the gas detection tank 7 for temporary storage, avoiding the pressure in the circulating water pool 1 being too large, causing the circulating cooling water to be blocked.

[0020] In a preferred embodiment, the gas phase separation pipeline 5 is provided with a gas pump 6, and a direct connection pipeline 9 is connected with the gas pump 6 in parallel, valves for controlling the gas path are arranged on both sides of the gas pump 6 and the direct connection pipeline 9, as more and more circulating cooling water enters the circulating water pool 1, the air pressure in the circulating water pool 1 increases accordingly, therefore, the gas is compressed into the gas detection tank 7 by the gas pump 6, and the compressed gas in the gas detection tank 7 has the following advantages:

[0021] 1. The gas is compressed, so that the gas detection tank 7 can store more gas;

[0022] 2. The concentration of the compressed gas increases, so that the gas sensor 10 can detect the leakage of harmful gas.

[0023] In a preferred embodiment, the inside of the circulating water pool 1 is provided with a pressure sensor 11, the control end controls the power of the air pump 6 through the electric signal of the pressure sensor 11, and the air is pumped out from the inside of the circulating water pool 1 through the pressure sensor 11 and the air pump 6, so as to keep the pressure balance in the circulating water pool 1 and ensure that the machine seal cooling water enters the circulating water pool 1 frequently.

[0024] In a preferred embodiment, the machine seal cooling water drainage pipeline 3 is provided with a control valve and a discharge pipeline 12 connected in parallel with the control valve, the discharge pipeline 12 is provided with a liquid pump 13 for discharging the cooling water to the circulating water pool, the control end controls the liquid pump 13, the control valve and the valve provided on the machine seal cooling water inlet pipeline 2 through the electric signal detected by the spoke type weighing sensor 4, the gas detection tank 7 stores a certain pressure of gas, after the machine seal cooling water in the circulating water pool 1 is filled, the valve provided on the machine seal cooling water inlet pipeline 2 is closed, the valve on the direct connection pipeline 9 is opened, the control valve provided on the machine seal cooling water drainage pipeline 3 is opened, the air pressure returns to the circulating water pool 1, and the circulating cooling water in the circulating water pool 1 is pushed out under the action of the air pressure and is sent to the circulating water pool, after the pressure in the circulating water pool 1 becomes smaller, the liquid pump 13 is used to pump out the cooling water in the mode of electric signal control, so as to save energy as much as possible, and the buffer tank 14 is used for temporary storage of the cooling water during the closing of the valve provided on the machine seal cooling water inlet pipeline 2.

[0025] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has different emphases, and the description not described in detail in individual embodiments can be referred to the description in other embodiments.

[0026] The above described embodiments only express the implementation of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A mechanical seal cooling water start-stop control system comprising a control terminal and a circulating water pool (1), the circulating water pool (1) being provided with a mechanical seal cooling water inlet pipeline (2) and a mechanical seal cooling water outlet pipeline (3), characterized in that, The bottom of the circulating water pool (1) is provided with a spoke type weighing sensor (4), valves are arranged on the machine seal cooling water inlet pipeline (2) and the machine seal cooling water outlet pipeline (3), and the opening and closing of the machine seal cooling water inlet pipeline (2) and the machine seal cooling water outlet pipeline (3) are controlled by the electric signal of the spoke type weighing sensor (4) at the control end.

2. The machine seal cooling water start-stop control system of claim 1, wherein, The machine seal cooling water inlet pipeline (2) is provided with a buffer tank (14).

3. The machine seal cooling water start-stop control system of claim 1, wherein, The circulating water pool (1) is further communicated with a gas phase separation pipeline (5), the other end of the gas phase separation pipeline (5) is communicated with a gas detection tank (7), the gas detection tank (7) is provided with a gas sensor (10) and a gas output pipeline (8), and the gas sensor (10) is electrically connected with the control end.

4. The machine seal cooling water start-stop control system of claim 3, wherein, The gas phase separation pipeline (5) is provided with a gas pump (6), and the gas phase separation pipeline (5) is further provided with a direct connection pipeline (9) connected with the gas pump (6) in parallel, and valves for controlling the gas paths are arranged on both sides of the gas pump (6) and the direct connection pipeline (9).

5. The machine seal cooling water start-stop control system of claim 4, wherein, The inside of the circulating water pool (1) is provided with a pressure sensor (11), and the power of the gas pump (6) is controlled by the electric signal of the pressure sensor (11) at the control end.

6. The machine seal cooling water start-stop control system of claim 4, wherein, The machine seal cooling water outlet pipeline (3) is provided with a control valve and a discharge pipeline (12) connected with the control valve in parallel, the discharge pipeline (12) is provided with a liquid pump (13) for discharging cooling water to the circulating water film pool.

7. The machine seal cooling water start-stop control system of claim 6, wherein, The control end controls the liquid pump (13), the control valve and the valve arranged on the machine seal cooling water inlet pipeline (2) by the electric signal detected by the spoke type weighing sensor (4).

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