Filling residual gas recovery system

Abstract

The utility model discloses a filling residual gas recovery system, and aims to provide a system capable of reducing the cost and improving the production efficiency. Comprising a filling main pipeline, a residual gas recovery main pipeline and a plurality of filling recovery branch pipelines, each filling recovery branch pipeline comprises a filling pipeline, a residual gas recovery pipeline and a filling gun pipeline, the filling pipeline is provided with a filling control valve, the outlet end of the filling control valve is connected with the inlet end of the residual gas recovery pipeline and the inlet end of the filling gun pipeline, the residual gas recovery pipeline is provided with a recovery control valve, and the recovery control valve is connected with the filling gun pipeline. The inlet end of each filling pipeline is connected with the main filling pipeline, and the outlet end of each residual gas recovery pipeline is connected with the main residual gas recovery pipeline; the residual gas recovery main pipeline is connected with an inlet of the gas storage tank through the recovery pump, and an outlet of the gas storage tank is connected with the filling main pipeline through the residual gas conveying pump. The system can reduce the cost. Meanwhile, the gas recovery time of the recovery pump is shortened, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to filling technology field more specifically, is related to a kind of filling residual gas recovery system. BACKGROUND

[0002] In the process of filling liquefied petroleum gas bottle, after filling is completed, a small amount of liquefied petroleum gas remains in filling gun pipeline, cannot be excluded cleanly, if not processing, when gun is pulled, it will be directly discharged to the surrounding environment, causing the waste of liquefied petroleum gas. At the same time, when accumulated to a certain concentration, there is the risk of explosion, there is a security risk. In order to avoid the above problems, residual gas recovery system is applied.

[0003] The above technical solution is in the filling system comprising multiple electronic filling machines, each electronic filling machine is equipped with a set of recovery gas circuit, each set of recovery gas circuit includes a recovery pump, after filling is completed, the liquefied petroleum gas in the pipeline from filling gun head to filling stop valve is sucked out by using recovery pump, the liquefied petroleum gas in the pipeline from gun head to liquefied petroleum gas filling stop valve is recovered, and is directly sent back to liquefied petroleum gas pipeline. The above technical solution occupies large area, increases the investment of system, and causes resource waste. At the same time, more connection points also increase more leakage risk, and there are more security risks. SUMMARY

[0004] The utility model aims at the technical defects in prior art, and provides a kind of filling residual gas recovery system that can reduce cost and improve production efficiency.

[0005] The technical scheme for realizing the purpose of the utility model is as follows:

[0006] A kind of filling residual gas recovery system, including filling main pipeline, residual gas recovery main pipeline and several filling recovery branch pipeline;Each branch filling recovery branch pipeline includes filling pipeline, residual gas recovery pipeline and filling gun pipeline, filling control valve is arranged on the filling pipeline, the outlet end of the filling control valve is connected with the inlet end of the residual gas recovery pipeline and the inlet end of the filling gun pipeline respectively, recovery control valve is installed on the residual gas recovery pipeline, the inlet end of each filling pipeline is connected with the filling main pipeline, the outlet end of each residual gas recovery pipeline is connected with the residual gas recovery main pipeline;The outlet end of each filling gun pipeline is connected with filling gun respectively;The residual gas recovery main pipeline is connected with the inlet of gas storage tank by recovery pump, and the outlet of the gas storage tank is connected with the filling main pipeline by residual gas delivery pump.

[0007] The recovery pump is 2, the inlet end of each recovery pump is connected with the residual gas recovery main pipeline, and the outlet end of each recovery pump is connected with the inlet of the gas storage tank.

[0008] The inlet end and the outlet end of the recovery pump and the inlet end and the outlet end of the residual gas conveying pump are respectively provided with a one-way valve.

[0009] The connection between the filling main pipeline and each filling pipeline and the connection between the residual gas recovery main pipeline and each residual gas recovery pipeline are respectively provided with a valve.

[0010] The residual gas conveying pump is two.

[0011] The filling control valve and the recovery control valve adopt stop valves.

[0012] The residual gas recovery main pipeline and the gas storage tank are respectively provided with a pressure gauge.

[0013] The valve is a ball valve.

[0014] Compared with the prior art, the beneficial effects of the present application are:

[0015] 1. The filling residual gas recovery system reduces the number of recovery pumps, saves cost and reduces resource waste.

[0016] 2. In the filling residual gas recovery system, each recovery pump is connected with the residual gas recovery main pipeline to extract the residual gas in the pipeline after filling and store it in the gas storage tank. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The figure shows the schematic diagram of the filling residual gas recovery system. DETAILED DESCRIPTION

[0018] The present application will be described in detail below in combination with the drawings and specific embodiments.

[0019] The schematic diagram of the filling residual gas recovery system of the present application is as shown in Figure 1As shown, it comprises a filling main pipeline 1, a residual gas recovery main pipeline 2 and a plurality of filling recovery branch pipelines 3. Each of the filling recovery branch pipelines 3 comprises a filling pipeline 3-1, a residual gas recovery pipeline 3-4 and a filling gun pipeline 3-6, the filling pipeline 3-1 is provided with a filling control valve 3-2, the outlet end of the filling control valve 3-2 is connected with the inlet end of the residual gas recovery pipeline 3-4 and the inlet end of the filling gun pipeline 3-6 through a three-way joint 3-3, and the residual gas recovery pipeline 3-4 is provided with a recovery control valve 3-5. The inlet end of each of the filling pipelines 3-1 is connected with the filling main pipeline 1, the outlet end of each of the residual gas recovery pipelines 3-4 is connected with the residual gas recovery main pipeline 2, and the outlet end of each of the filling gun pipelines 3-6 is connected with a filling gun 4. The residual gas recovery main pipeline 2 is connected with the inlet of a gas storage tank 6 through a recovery pump 5, and the outlet of the gas storage tank 6 is connected with the filling main pipeline 1 through a residual gas delivery pump 7. Preferably, two residual gas delivery pumps 7 are used.

[0020] In order to detect the pressure state of the residual gas recovery main pipeline and the gas storage tank, preferably, a pressure gauge 8 is installed on the residual gas recovery main pipeline 2 and the gas storage tank 6 respectively.

[0021] Preferably, the number of the recovery pumps 5 is adjusted according to the number of filling devices, and preferably two recovery pumps 5 are used, the inlet end of each of the recovery pumps 5 is connected with the residual gas recovery main pipeline 2, and the outlet end of each of the recovery pumps 5 is connected with the inlet of the gas storage tank 6.

[0022] Preferably, the inlet end and the outlet end of each of the recovery pumps 5 and the inlet end and the outlet end of each of the residual gas delivery pumps 7 are respectively provided with a one-way valve 9 to prevent gas backflow.

[0023] Preferably, a valve 10 is arranged at the connection between the filling main pipeline 1 and each of the filling pipelines 3-1 and at the connection between the residual gas recovery main pipeline 2 and each of the residual gas recovery pipelines 3-4. In this embodiment, the valve 10 is a ball valve.

[0024] Preferably, the filling control valve 3-2 and the recovery control valve 3-5 are stop valves.

[0025] In use, first, the filling gun 4 is aimed at the valve port of the cylinder angle valve 11, then the cylinder angle valve 11 is opened, and then the filling control valve 3-2 is opened, and the liquefied petroleum gas in the filling main pipeline 1 is filled into the filling gun 4 through the filling pipeline 3-1, the filling control valve 3-2, the filling gun pipeline 3-6. When the filling reaches the set weight value, the filling control valve is closed to stop filling, and the cylinder angle valve is closed. Then the recovery control valve 3-5 is opened, the recovery pump 5 connected to the gas tank recovery main pipeline is started, the liquefied petroleum gas in the pipeline from the filling gun head to the filling control valve is sucked out and sent to the recovery main pipeline 2 and the gas tank. When the set recovery pressure is reached, the recovery pump 5 stops recovery, the recovery control valve 3-5 is closed, and the filling gun is separated from the cylinder angle valve. When the residual gas in the gas tank 6 reaches a certain pressure, the residual gas delivery pump 7 is started to send the liquefied petroleum gas in the gas tank to the filling main pipeline 1. When the set recovery pressure is reached, the residual gas delivery pump stops.

[0026] The filling residual gas recovery system of the utility model reduces the number of recovery pumps, can save cost, and reduce resource waste. At the same time, due to fewer connection points, it is beneficial to reduce the risk of leakage and improve the safety of production.

[0027] The above only describes the preferred embodiments of the utility model, and it should be pointed out that for ordinary technical personnel in the technical field, several improvements and refinements can be made without departing from the principles of the utility model, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. A filling waste gas recovery system, characterized in that, The system includes a main filling pipeline, a main residual gas recovery pipeline, and several branch filling and recovery pipelines. Each branch filling and recovery pipeline includes a filling pipeline, a residual gas recovery pipeline, and a filling gun pipeline. A filling control valve is installed on the filling pipeline, with its outlet connected to both the inlet of the residual gas recovery pipeline and the inlet of the filling gun pipeline. A recovery control valve is installed on the residual gas recovery pipeline. The inlet of each filling pipeline is connected to the main filling pipeline, and the outlet of each residual gas recovery pipeline is connected to the main residual gas recovery pipeline. The outlet of each filling gun pipeline is connected to a filling gun. The main residual gas recovery pipeline is connected to the inlet of a gas storage tank via a recovery pump, and the outlet of the gas storage tank is connected to the main filling pipeline via a residual gas delivery pump.

2. The filling waste gas recovery system according to claim 1, characterized in that, There are two recovery pumps. The inlet of each recovery pump is connected to the residual gas recovery main pipe, and the outlet of each recovery pump is connected to the inlet of the gas storage tank.

3. The filling residual gas recovery system according to claim 2, characterized in that, One-way valves are respectively installed at the inlet and outlet of the recovery pump and at the inlet and outlet of the residual gas transfer pump.

4. The filling residual gas recovery system according to claim 1, characterized in that, Valves are installed at the connection points between the main filling pipeline and each filling pipeline, and at the connection points between the main residual gas recovery pipeline and each residual gas recovery pipeline.

5. The filling residual gas recovery system according to claim 3, characterized in that, There are two residual gas transfer pumps.

6. The filling residual gas recovery system according to claim 1, characterized in that, The filling control valve and the recovery control valve are shut-off valves.

7. The filling residual gas recovery system according to claim 1, characterized in that, Pressure gauges are installed on the main pipeline for residual gas recovery and the gas storage tank.

8. The filling residual gas recovery system according to claim 4, characterized in that, The valve is a ball valve.

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