Intelligent closing device for emergency cut-off valve of LPG tank car based on environmental perception

Abstract

The utility model relates to the technical field of valves, in particular to an intelligent closing device for an emergency cut-off valve of an LPG tank truck based on environmental perception. The utility model aims to provide an intelligent closing device for an emergency cut-off valve of an LPG tank car based on environmental perception. The device has the characteristics of simplicity in operation, safety and reliability. According to the technical scheme, the intelligent closing device for the emergency cut-off valve of the LPG tank car based on environmental perception comprises the emergency cut-off valve and a handle; the device is characterized by further comprising a controller, a concentration sensor and an automatic trigger, the handle and the automatic trigger are connected with the emergency cut-off valve through guide ropes; the automatic trigger comprises a sliding cylinder, a sliding block slidably positioned in the sliding cylinder, a plug pin used for locking the sliding block, a brake spring pulling the sliding block and an electromagnet attracting the plug pin to be separated from the sliding block. And the controller is electrically connected with the concentration sensor and the electromagnet.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely is a kind of LPG tank car emergency shut-off valve intelligent closing device based on environment perception. BACKGROUND

[0002] Liquefied gas tanker (liquefied gas tanker) is also called LPG transport vehicle, is used to transport propane, propylene, dimethyl ether, liquid ammonia, methylamine, acetaldehyde and other liquefied gas special automobile. Liquefied gas tanker is a kind of pressure vessel, according to the "pressure vessel safety technology supervision regulation" "liquefied gas automobile tank car safety supervision regulation" and GB150 "steel pressure vessel" issued by State Administration of Technical Supervision, it is a special transport vehicle using lightweight design, manufacturing, with reasonable structure, safe and reliable, easy to operate, easy to maintain and other characteristics. In order to ensure the safety of liquefied gas filling and unloading, transport vehicle is generally provided with emergency shut-off valve. At present, the mechanical type emergency shut-off valve of LPG transport vehicle generally has two control modes, one is to open or close the handle by manual operation, and the other is to pull the traction cable to remotely close the valve.

[0003] During the filling or unloading of tank car, its emergency shut-off is in open state, at this time, if LPG leakage occurs (such as rapid connector is separated and a large amount of leakage, interface is not tight and micro leakage, etc.), since the existing scheme cannot monitor the concentration of characteristic gas in the environment (air environment of loading and unloading area) in real time and automatically close the emergency shut-off valve when the environment depth exceeds the set threshold, accident is prone to occur. Such as "Linyi Jinyu Petrochemical Co., Ltd." 6·5 "tank car leakage major explosion and fire accident", that is, LPG leaks a lot, the on-site personnel fails to manually operate to close the emergency shut-off valve, so that the medium continues to leak a lot and finally explodes.

[0004] When tank car is driving or parking (such as parking for rest in service area), if there is medium leakage in tank body or pipeline (such as flange sealing part or early perforation or cracking of tank body), the existing technical scheme mainly depends on personnel inspection, but since it does not master the key information whether the environmental gas concentration is abnormal, on-site inspection often has no pertinence, combined with the limitation of on-site conditions and detection equipment, the early leakage often cannot be checked and found by vehicle personnel, which is easy to leave accident hidden danger. INVENTION CONTENTS

[0005] The utility model aims at overcoming the deficiency in the above background art, and provides an LPG tank car emergency shut-off valve intelligent closing device based on environment perception, which should have the characteristics of simple operation and safety and reliability.

[0006] The technical scheme of the utility model is:

[0007] An environmental perception-based LPG tank truck emergency cut-off valve intelligent closing device, comprising an emergency cut-off valve and a handle, characterized in that it further comprises a controller, a concentration sensor and an automatic trigger; the handle and the automatic trigger are connected to the emergency cut-off valve through a guide cable; the automatic trigger comprises a sliding cylinder, a sliding block slidably positioned in the sliding cylinder, a latch for locking the sliding block, a brake spring for pulling the sliding block and an electromagnet for attracting the latch to disengage from the sliding block; the controller is electrically connected to the concentration sensor and the electromagnet.

[0008] The emergency cut-off valve is provided with an action rod and a return spring.

[0009] The guide cable comprises a first guide cable, a second guide cable and a main guide cable; the handle is connected to the action rod through the second guide cable and the main guide cable; the sliding block is connected to the action rod through the first guide cable and the main guide cable.

[0010] The latch is slidably mounted on the cylinder wall of the sliding cylinder and extends into the sliding cylinder after passing through the sliding hole of the sliding cylinder.

[0011] The latch is further provided with a latch spring and an iron block.

[0012] The sliding block is provided with a pull rod which extends out of the sliding cylinder after passing through the sliding slot of the sliding cylinder; the outer circumferential surface of the sliding block is provided with an annular groove matched with the latch.

[0013] The sliding direction of the latch is perpendicular to the axis of the sliding cylinder.

[0014] The position of the electromagnet corresponds to the position of the iron block.

[0015] The beneficial effects of the utility model are:

[0016] 1. When medium leakage occurs during the loading and unloading of the LPG tank truck, the emergency cut-off valve can be triggered to close according to the concentration of the characteristic gas in the environment to prevent the medium from continuing to leak out. Compared with the prior art, the device can automatically control the closure of the emergency cut-off valve, solving the problem that personnel cannot approach and operate in the case of LPG rapid or large leakage.

[0017] 2. During the driving and parking of the LPG tank truck, the gas concentration sensor can continuously sense the concentration of the characteristic gas in the environment, dynamically determine the leakage condition of the tank truck, and is beneficial to early intervention of the leakage to prevent the accident from expanding. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the connection relationship schematic diagram of the utility model.

[0019] Figure 2 is one of the structure schematic diagrams of the automatic trigger of the utility model.

[0020] Figure 3 is the structure schematic view two of the automatic trigger of the utility model.

[0021] Figure 4 is the principle view of the utility model.

[0022] Reference signs:

[0023] Emergency cut-off valve 2, connecting rod 2.1, cable rod 2.2, reset spring 2.3, guide bracket 2.4, first guide cable 2.5, second guide cable 2.6, main guide cable 2.8, electromagnet 3.1, concentration sensor 3.2, automatic trigger 4, bolt 4.1, bolt spring 4.2, sliding block 4.3, annular groove 4.3.1, pull rod 4.3.2, brake spring 4.4, sliding cylinder 4.5, sliding groove 4.5.1, sliding hole 4.5.2, handle 5. DETAILED DESCRIPTION

[0024] In order to make the utility model purposes, technical scheme and advantages more clearly, the following will be combined with the drawings and examples, and the utility model will be further described in detail.It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0025] As shown in Figure 1 A kind of LPG tank truck emergency cut-off valve intelligent closing device based on environmental perception, including handle 5, emergency cut-off valve 2, controller, concentration sensor 3.2, automatic trigger 4.

[0026] The handle and automatic trigger are connected emergency cut-off valve by guide cable.This device senses the characteristic gas concentration in environment by concentration sensor, and when monitoring that tank car leaks, controller closes emergency cut-off valve, which can also be manually closed by handle.

[0027] The emergency cut-off valve (existing valve) is installed at the outlet position of IPG tank car.The emergency cut-off valve is provided with action rod, reset spring 2.3, guide bracket 2.4.The guide bracket is installed on the shell of emergency cut-off valve, and guide hole is provided on the guide bracket.The action rod includes connecting rod 2.1 and cable rod 2.2.

[0028] The connecting rod is swingably positioned on the shell of emergency cut-off valve, and rotating connecting rod can drive the internal valve of emergency cut-off valve to move, so as to open or close emergency cut-off valve, and the two ends of reset spring are connected with connecting rod and guide bracket respectively, for providing pulling force to connecting rod to reset (open emergency cut-off valve).The cable rod is swingably positioned on connecting rod.

[0029] The guide ropes include a first guide rope 2.5, a second guide rope 2.5, and a main guide rope 2.8. One end of the main guide rope is fixed to a rope rod, and the other end of the main guide rope is divided into two paths after passing through a guide support, one path being a first guide rope connected to an automatic trigger, and the other path being a second guide rope connected to a handle. When the handle is pulled, the second guide rope, the main guide rope, the rope rod, and a connecting rod are driven to rotate, and an emergency shut-off valve is closed. Alternatively, when the automatic trigger is started, the first guide rope, the main guide rope, the rope rod, and the connecting rod are driven to rotate, and the emergency shut-off valve is closed. When the handle is released or the automatic trigger is closed, the emergency shut-off valve is opened.

[0030] The concentration sensor is installed around the emergency shut-off valve and is used to continuously sense the concentration of the characteristic gas in the environment. The concentration sensor can be one or multiple.

[0031] As shown in Figure 1 , Figure 2 , Figure 3 The automatic trigger includes a sliding cylinder 4.5, a latch 4.1, a sliding block 4.3, a brake spring 4.4, and an electromagnet 3.1.

[0032] The sliding cylinder is provided with a sliding hole 4.5.2 and an axially extending sliding groove 4.5.1. The sliding block is axially slidably positioned in the sliding cylinder. The sliding block is fixed to the first guide rope, and the brake spring is arranged in the inner cavity of the sliding cylinder and has two ends fixed to the sliding cylinder and the sliding block, respectively, to provide a pulling force to the sliding block so that the connecting rod is driven to rotate through the first guide rope, the main guide rope, and the rope rod.

[0033] The latch is slidably installed on the sliding cylinder wall and has a sliding direction perpendicular to the axis of the sliding cylinder. One end of the latch extends into the sliding cylinder after passing through the sliding hole. The outer circumferential surface of the sliding block is provided with an annular groove 4.3.1 matched with the latch. The latch is provided with a latch spring 4.2 for resetting. The latch spring can drive the latch to be clamped into the annular groove to prevent the sliding block from sliding. The two ends of the latch spring are fixed to the sliding cylinder wall and the end boss of the latch, respectively. The end boss of the latch is further provided with an iron block (omitted in the figure). The position of the electromagnet corresponds to the position of the iron block. When the electromagnet is electrified, the iron block can be attracted to make the latch disengage from the annular groove and release the sliding block. The sliding block is further provided with a pull rod 4.3.2 which extends out of the sliding cylinder after passing through the sliding groove.

[0034] The controller is electrically connected to the electromagnet and the concentration sensor.

[0035] The above components are all existing structures and are installed on the tank car.

[0036] The working principle of the utility model is as follows:

[0037] The concentration sensor monitors the concentration of the characteristic gas in the environment in real time, when the concentration of the characteristic gas exceeds the set threshold, the controller sends a signal to the electromagnet, the electromagnet is powered to generate magnetic force, the plug is attracted to separate from the slider so that the brake spring pulls the slider, the slider drives the connecting rod to rotate through the first guide cable, the main guide cable and the cable rod, and the emergency shut-off valve is closed to ensure personnel safety.

[0038] When the fault is removed, the electromagnet is de-energized, the pull rod is manually pulled to reset, the plug is automatically inserted into the annular groove to lock the slider, the connecting rod is reset, and the emergency shut-off valve is automatically opened.

[0039] The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described in the specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

Claims

1. An environmental perception-based LPG tank truck emergency shut-off valve intelligent closing device, comprising an emergency shut-off valve (2), a handle (5); characterized in that: It also includes a controller, a concentration sensor (3.2), an automatic trigger (4); the handle and the automatic trigger are connected to an emergency cut-off valve through guide ropes; the automatic trigger includes a slide cylinder (4.5), a slide block (4.3) slidably positioned in the slide cylinder, a latch (4.1) for locking the slide block, a brake spring (4.4) for pulling the slide block, and an electromagnet (3.1) for attracting the latch to disengage from the slide block; the controller is electrically connected to the concentration sensor and the electromagnet.

2. The environment perception based LPG tank truck emergency cut valve intelligent closing device according to claim 1, characterized in that: The emergency cut-off valve is provided with an action rod and a return spring (2.3).

3. The environment perception based LPG tank truck emergency cut valve intelligent closing device according to claim 2, characterized in that: The guide ropes include a first guide rope (2.5), a second guide rope (2.6), and a main guide rope (2.8); the handle is connected to the action rod through the second guide rope and the main guide rope; the slide block is connected to the action rod through the first guide rope and the main guide rope.

4. The environment perception based LPG tank truck emergency cut valve intelligent closing device according to claim 3, characterized in that: The latch is slidably mounted on the slide cylinder wall and extends into the slide cylinder after passing through the slide hole of the slide cylinder.

5. The environment perception based LPG tank truck emergency cut valve intelligent closing device according to claim 4, characterized in that: The latch is also provided with a latch spring (4.2) and an iron block.

6. The environment perception based LPG tank truck emergency cut valve intelligent closing device according to claim 5, characterized in that: The slide block is provided with a pull rod (4.3.2) that extends outside the slide cylinder after passing through the slide slot of the slide cylinder; the outer circumferential surface of the slide block is provided with an annular groove (4.3.1) matched with the latch.

7. The environment perception based LPG tank truck emergency cut valve intelligent closing device according to claim 6, characterized in that: The sliding direction of the latch is perpendicular to the axis of the slide cylinder.

8. The environment perception based LPG tank truck emergency cut valve intelligent closing device according to claim 7, characterized in that: The position of the electromagnet corresponds to the position of the iron block.

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