Automatic regulating system for pipeline pressure building

Abstract

The utility model relates to the technical field of chemical material conveying, in particular to a pipeline pressure building automatic adjusting system which comprises a storage tank, a feeding end of the storage tank is provided with a feeding pipeline, the feeding pipeline is provided with a first pressure sensor and a first valve, and the first valve is located between the first pressure sensor and the storage tank. The first valve is connected with the first pressure sensor through a control system, a discharging pipeline is arranged at the discharging end of the storage tank, a second pressure sensor and a second valve are arranged on the discharging pipeline, the second valve is located between the second pressure sensor and the storage tank, and a pump is arranged between the second valve and the second pressure sensor. A branch pipe is arranged between the feeding pipeline and the discharging pipeline, one end of the branch pipe is connected with the feeding end of the first valve, the other end of the branch pipe is connected with the discharging end of the pump, a third valve is arranged on the branch pipe, and the third valve is connected with the second pressure sensor through a control system. The problems of pressure building and even leakage of a material conveying pipeline can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of chemical material conveying, specifically to pipeline pressure accumulation automatic regulating system. BACKGROUND

[0002] In the chemical industry, storage tanks are one of the most important infrastructures, which undertake the task of storing, transferring and temporarily storing various liquid and gas materials. The feed end of the storage tank is connected with the feeding device through the feed pipeline, and the discharge end of the storage tank is connected with the discharge device through the discharge pipeline. During the conveying of chemical materials, the material receiving end is usually informed by the material sending end to open the valve, for example, when the feeding device conveys materials to the storage tank through the feed pipeline, the valve at the feeding device end is opened at the same time, and information is sent to the control system. After the control system receives the information from the feeding device end, it sends a receiving instruction to the storage tank end to control the opening of the valve of the storage tank, and the material enters the storage tank end from the feeding device end through the feed pipeline. However, this technical solution still has the following technical problems:

[0003] 1. During the conveying of materials, if the information transmission fails, the valve at the material receiving end may not be opened when the feeding device has already started to convey materials, which may cause the materials to accumulate in the pipeline, resulting in pipeline pressure accumulation and even pipeline leakage.

[0004] 2. When the material conveying system is in a non-working state, some materials may remain in the pipeline. In areas with high temperatures or during the summer, liquid materials are prone to gasification, which may increase the pressure in the pipeline and cause pipeline pressure accumulation and even leakage.

[0005] 3. In the prior art, when the pipeline pressure accumulates, the pressure information is transmitted to the DCS through the pressure transmitter arranged on the pipeline, the DCS monitor personnel then transmit the information to the field operators, and the field operators manually handle it. This information transmission method lacks stability and is prone to errors. Even if the information is transmitted in time, it may not be handled in time, which may cause pipeline pressure accumulation and even leakage, posing a high safety hazard. The information transmission and processing process is very complicated, inefficient and costly. INVENTION CONTENTS

[0006] The pipeline pressure accumulation automatic regulating system provided by the utility model can solve the problems of pipeline pressure accumulation and even leakage during material conveying, and low processing efficiency when pressure accumulation occurs.

[0007] The present application provides the following technical solutions:

[0008] The pipeline pressure holding automatic adjusting system comprises a storage tank, a feeding pipeline is arranged at the feeding end of the storage tank, a first pressure sensor and a first valve are arranged on the feeding pipeline, the first valve is located between the first pressure sensor and the storage tank, the first valve is connected with the first pressure sensor through a control system, a discharging pipeline is arranged at the discharging end of the storage tank, a second pressure sensor and a second valve are arranged on the discharging pipeline, the second valve is located between the second pressure sensor and the storage tank, a pump is arranged between the second pressure sensor and the second valve, a branch pipeline is arranged between the feeding pipeline and the discharging pipeline, one end of the branch pipeline is connected with the feeding end of the first valve, the other end of the branch pipeline is connected with the discharging end of the pump, a third valve is arranged on the branch pipeline, and the third valve is connected with the second pressure sensor through the control system.

[0009] Beneficial effects: The real-time pressure in the pipeline is transmitted to the control system through the pressure sensor, the opening and closing or closing of the valve is controlled through the control system, the pressure relief of the pipeline is realized, the pipeline gas holding or even leakage is prevented, the automatic adjustment of the pipeline pressure holding is realized, the automatic control of the material conveying pipeline is realized, the operation efficiency of the system is improved, the human operation errors are reduced, the work burden of the operator is reduced, and the stability of the material conveying system is ensured. The branch pipeline is arranged at the feeding end of the first valve and the discharging end of the pump, and the on-off of the branch pipeline is controlled through the third valve, so that the staged pressure relief of the discharging pipeline can be realized. When the pressure in the discharging pipeline becomes large, the control system controls the third valve to be opened, so that the material enters the feeding pipeline to perform the first-stage pressure relief. Since the feeding pipeline is long and has a certain accommodation space, when the material enters the feeding pipeline, if the pressure in the feeding pipeline does not reach the specified value, the first valve is always in the closed state, and the pressure relief of the discharging pipeline through the feeding pipeline can be realized. If the pressure in the feeding pipeline reaches the specified value, the first valve is opened, so that the material enters the storage tank to perform the second-stage pressure relief, and the pressure relief of the discharging pipeline through the feeding pipeline and the storage tank is realized. Therefore, even in the state that the storage tank is full of material and cannot be opened, the rapid pressure relief of the discharging pipeline can also be realized. The branch pipeline is connected with the feeding pipeline and the storage tank, too many pipelines and valves connected on the storage tank are avoided, and the safety and stability of the storage tank are ensured. Even if the information transmission process of the material sending end to the material receiving end to open the valve is wrong, the valve of the material receiving end can also be opened through the technical scheme, and the normal operation of the material is ensured.

[0010] Further, the control system is connected with a liquid level sensor arranged on the storage tank, the real-time liquid level information of the material in the storage tank is transmitted to the control system through the liquid level sensor, and when the liquid level of the material in the storage tank reaches the upper limit value set on the control system, the control system controls the first valve to be closed, so that the material cannot enter the storage tank.

[0011] Beneficial effects: The liquid level sensor can monitor the liquid level in the storage tank in real time, ensuring that the operator can learn about the state of the storage tank in a timely manner. The control system can also set a liquid level alarm value (such as high alarm and high-high alarm), and when the liquid level reaches the liquid level alarm value, the control system can issue a closing instruction to the first valve to ensure the normal operation of the storage tank. The control system can also set a priority, and only when the liquid level of the material in the storage tank does not reach the alarm value, the first valve can be opened for pipeline pressure relief operation.

[0012] Further, the control system is electrically connected with the alarm.

[0013] Beneficial effects: When the control system detects an abnormal situation, it can quickly send a signal to the alarm, and the alarm can immediately issue an alarm after receiving the signal from the control system, reminding the operator to take action.

[0014] Further, the storage tank is provided with a breather valve.

[0015] Beneficial effects: The breather valve allows air to enter and exit the storage tank to balance the internal pressure and prevent excessive high or low pressure caused by temperature changes, or liquid level fluctuations, or gas entering the storage tank. After the material in the feed pipe and discharge pipe is gasified, the gasified material will eventually enter the storage tank and be discharged through the breather valve, which can effectively treat the gasified material and prevent pollution of the surrounding environment.

[0016] Further, the storage tank is connected to the feed equipment through the feed pipe, and the fourth valve is provided between the feed equipment and the first pressure sensor.

[0017] Beneficial effects: The fourth valve controls the on-off of the feed equipment and the inlet pipe, and can also control the flow of the material in the feed pipe.

[0018] Further, the storage tank is connected to the discharge equipment through the discharge pipe, and the fifth valve is provided between the discharge equipment and the second pressure sensor.

[0019] Beneficial effects: The fifth valve controls the on-off of the discharge pipe and the discharge equipment, and can also effectively control the flow of the material.

[0020] Further, a degassing device is provided between the discharge equipment and the fifth valve.

[0021] Beneficial effects: The degassing device can reduce the gas content in the liquid material to prevent gas blockage and hinder the flow of the material.

[0022] Further, the control system uses a distributed control system.

[0023] Beneficial effects: The distributed control system can achieve centralized management and decentralized control.

[0024] Furthermore, the bracket is arranged in a section where the feed pipe and the discharge pipe are parallel to each other.

[0025] Beneficial effects: The bracket evenly distributes the weight and pressure of the pipeline, avoiding local stress concentration. At the same time, it facilitates the shortest path connection between the feed and discharge pipes, reducing the length of the branch pipe and lowering material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a structural diagram of the automatic pipeline pressure regulation system of the utility model. DETAILED DESCRIPTION

[0027] The following is further described in detail through specific implementation methods:

[0028] The symbols in the drawings of the specification include: feed pipe L1, discharge pipe L2, first valve 1, second valve 2, third valve 3, fourth valve 4, fifth valve 5, first pressure sensor 6, second pressure sensor 7, pump 8, and degassing device 9.

[0029] Example 1

[0030] like Figure 1 As shown, the pipeline pressure automatic regulation system includes a storage tank and a control system. The control system adopts a distributed control system (DCS), and the storage tank is equipped with a breathing valve. The feed end of the storage tank is provided with a feed pipe L1, and the feed pipe L1 is provided with a first pressure sensor 6 and a first valve 1. The first valve 1 is located between the first pressure sensor 6 and the storage tank. The first valve 1 is connected to the first pressure sensor 6 through the control system. The storage tank is connected to the feeding equipment through the feed pipe L1. A fourth valve 4 is provided between the feeding equipment and the first pressure sensor 6. The discharge end of the storage tank is provided with a discharge pipe L2. The discharge pipe L2 is provided with a second pressure sensor 7 and a second valve 2. The second valve 2 is located between the second pressure sensor 7 and the storage tank. A pump 8 is provided between the second valve 2 and the second pressure sensor 7. The storage tank is connected to the discharge equipment through the discharge pipe L2. A fifth valve 5 is provided between the discharge equipment and the second pressure sensor 7. A branch pipe is provided between the feed pipe L1 and the discharge pipe L2. One end of the branch pipe is connected to the feed port of the first valve 1, and the other end is connected to the discharge port of the pump 8. A third valve 3 is installed on the branch pipe, which is connected to the second pressure sensor 7 via the control system. The branch pipe is located in a section parallel to the feed pipe L1 and the discharge pipe L2. The branch pipe is perpendicular to the feed pipe L1 and the discharge pipe L2, and its diameter is smaller than that of the feed pipe L1 and the discharge pipe L2, reducing material costs. The second valve 2, the fourth valve 4, the fifth valve 5, and the pump 8 can be connected to the control system separately.

[0031] The control system is connected with the liquid level sensor arranged on the storage tank, the liquid level sensor transmits the real-time liquid level information of the material in the storage tank to the control system, when the liquid level of the material in the storage tank reaches the upper limit value of the liquid level set on the control system, the control system controls the first valve 1 to be closed, so that the material cannot enter the storage tank. The control system is connected with the alarm.

[0032] The working mode of the pipeline pressure holding automatic adjusting system includes: (the initial state of each valve is closed)

[0033] The first working mode: the first pressure sensor 6 transmits the real-time pressure information of the feeding pipeline to the control system, when the pressure of the feeding pipeline reaches the upper limit value, the control system controls the first valve 1 to be opened to release the pressure of the feeding pipeline L1. Specifically, the feeding equipment (such as an oil tank truck) is connected with the storage tank through the feeding pipeline L1 and feeds the material to the storage tank through the feeding pipeline L1, the fourth valve 4 is opened, the material enters the feeding pipeline L1, and the first valve 1 is still in the closed state, so that the pressure in the feeding pipeline L1 becomes larger; or, in the non-working state of the material conveying system, the material gasifies and remains in the feeding pipeline L1, when the pressure value of the feeding pipeline L1 received by the control system reaches the upper limit value (such as 0.8 MPa) of the feeding pressure set on the control system, the control system gives the first valve 1 an opening instruction to control the first valve 1 to be opened, so that the material enters the storage tank to release the pressure of the feeding pipeline L1, at the same time, the control system sends an alarm signal to the alarm, and the alarm gives an audible and light alarm to prompt the operator. After the feeding pipeline L1 is fed or the pressure is released, the control system gives the first valve 1 an opening instruction to control the first valve 1 to be closed.

[0034] The second working mode: the second pressure sensor 7 transmits the real-time pressure information of the discharge pipeline to the control system, when the pressure of the discharge pipeline reaches the upper limit value, the control system controls the first valve 1 and the third valve 3 to open at the same time, and the discharge pipeline L2 is depressurized. Specifically, the discharge equipment (such as a vehicle that needs to be filled with oil, or an oil gun, etc.) is connected with the storage tank through the discharge pipeline L2, the storage tank discharges through the discharge pipeline L2, the second valve 2 is opened, the pump 8 is started, the material enters the discharge pipeline L2, and the fifth valve 5 is still in the closed state, which causes the pressure in the discharge pipeline L2 to become larger; or the power of the pump 8 is too large, etc., which causes the pressure in the discharge pipeline L2 to become larger, when the control system receives the pressure value of the discharge pipeline L2 reaches the upper limit value of the discharge pressure set by the control system (such as 1.5 MPa), the control system gives the first valve 1 and the third valve 3 an opening instruction, and controls the first valve 1 and the third valve 3 to open at the same time, so that the material enters the storage tank through the branch pipe and the feed pipeline L1, at the same time, the alarm receives the alarm signal sent by the control system, and sends an audible and light alarm to the operator. After the discharge pipeline L2 is depressurized, the control system gives the first valve 1 and the third valve 3 a closing instruction, and controls the first valve 1 and the third valve 3 to close at the same time, the discharge pipeline L2 is normally discharged, and after the discharge is completed, the second valve 2, the pump 8 and the fifth valve 5 are closed.

[0035] The third working mode: when the material conveying system is in a non-working state, due to the gasification of the material remaining in the discharge pipeline L2, etc., the pressure in the discharge pipeline L2 becomes larger, the second pressure sensor 7 transmits the real-time pressure information of the discharge pipeline L2 to the control system, when the pressure of the discharge pipeline L2 reaches the upper limit value of the discharge pressure set by the control system, the control system controls the third valve 3 to open, so that the material enters the feed pipeline L1, and the discharge pipeline L2 is depressurized through the feed pipeline L1; the first pressure sensor 6 transmits the real-time pressure information of the feed pipeline L1 to the control system, when the pressure of the feed pipeline L1 reaches the upper limit value of the feed pressure set by the control system, the control system controls the first valve 1 to open, so that the material enters the storage tank, and the feed pipeline L1 is depressurized. After the material enters the storage tank, the liquid material in the material will remain in the storage tank, and the gas material in the material will be discharged from the storage tank through the breather valve. Since the feed pipeline L1 usually has a certain length and capacity, if the pressure value in the feed pipeline L1 is still below the upper limit value of the feed pressure after the material enters the feed pipeline L1 for the first stage of depressurization, the first valve 1 will not open, and the discharge pipeline L2 is depressurized through the feed pipeline L1. When the pressure in the discharge pipeline L2 becomes smaller to a specified value, the control system controls the third valve 3 to close.

[0036] Example two

[0037] The difference between the embodiment and the embodiment one is that the gas removal device 9 is arranged on the discharge pipeline L2, and the gas removal device 9 is located between the discharging device and the fifth valve 5.

[0038] The above is only an embodiment of the utility model, and the utility model is not limited to the field involved in the embodiment. The specific structure and characteristics and other common knowledge in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the structure of the utility model, a number of modifications and improvements can be made, which should also be considered as the protection scope of the utility model. The protection scope of the present application should be subject to the content of the claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A pipeline pressure containment automatic regulating system comprising a storage tank, characterized in that, The feed end of the storage tank is provided with a feed pipeline, the feed pipeline is provided with a first pressure sensor and a first valve, the first valve is located between the first pressure sensor and the storage tank, the first valve is connected with the first pressure sensor through a control system, the discharge end of the storage tank is provided with a discharge pipeline, the discharge pipeline is provided with a second pressure sensor and a second valve, the second valve is located between the second pressure sensor and the storage tank, a pump is arranged between the second valve and the second pressure sensor, a branch pipeline is arranged between the feed pipeline and the discharge pipeline, one end of the branch pipeline is connected with the feed end of the first valve, the other end of the branch pipeline is connected with the discharge end of the pump, a third valve is arranged on the branch pipeline, the third valve is connected with the second pressure sensor through the control system.

2. The pipe surge automatic regulating system of claim 1, wherein: The control system is connected with a liquid level sensor arranged on the storage tank.

3. The pipe surge automatic regulating system of claim 1, wherein: The control system is connected with an alarm.

4. The pipe surge automatic regulating system of claim 1, wherein: A breather valve is arranged on the storage tank.

5. The pipe surge automatic regulating system of claim 1, wherein: The storage tank is connected with a feeding device through the feed pipeline, a fourth valve is arranged between the feeding device and the first pressure sensor.

6. The pipe surge automatic regulating system of claim 1, wherein: The storage tank is connected with a discharging device through the discharge pipeline, a fifth valve is arranged between the discharging device and the second pressure sensor.

7. The pipe surge automatic regulating system of claim 6, wherein: A degassing device is arranged on the discharge pipeline, the degassing device is located between the discharging device and the fifth valve.

8. The pipe surge automatic regulating system of claim 1, wherein: The control system adopts a distributed control system.

9. The pipe surge automatic regulating system of claim 8, wherein: The branch pipeline is arranged in a section where the feed pipeline and the discharge pipeline are parallel to each other.

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