Liquid ammonia storage tank leakage detection mechanism

Abstract

The utility model discloses a liquid ammonia storage tank leakage detection mechanism which comprises a support and a plurality of detectors used for detecting ammonia gas, a liquid ammonia storage tank is horizontally installed on the support, and the detectors are installed on the liquid ammonia storage tank. A top plate is horizontally arranged above the liquid ammonia storage tank in the length direction of the liquid ammonia storage tank, the two ends of the top plate are downwards, vertically and fixedly connected with vertical rods, and the vertical rods are installed on the ground. Two overturning plates are symmetrically arranged on the two sides of the top plate, and the edges, close to the top plate, of the overturning plates are rotationally connected to the top plate; an overturning driving assembly is mounted on the vertical rod, and the overturning driving assembly is connected with the two overturning plates; a plurality of spraying heads are installed at the bottom of the overturning plate and communicate with a water supply mechanism. According to the device, effective leakage detection can be carried out on the liquid ammonia storage tank, after a leakage accident occurs, the overturning plate can swing to be close to the storage tank and spray clear water, leaked ammonia gas is effectively absorbed, the spraying and adsorption effects are excellent, and the ammonia gas can be effectively prevented from being diffused and escaping outwards.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of chemical equipment, concretely relates to a liquid ammonia storage tank leakage detection mechanism. BACKGROUND

[0002] Liquid ammonia is the core raw material of nitrogen fertilizer industry and is mainly used for producing urea, compound fertilizer, ammonium nitrate and other products. Liquid ammonia storage tank is a key storage equipment in chemical industry and is mainly used for storing and transporting liquid ammonia, so it is particularly important to detect the leakage of liquid ammonia storage tank. The liquid ammonia storage tank leakage detection mechanism is generally provided with a detection sensor and a spraying mechanism. When the detection sensor detects a leakage problem, the spraying mechanism sprays water to the storage tank to absorb the leaked ammonia gas. However, the spraying effect of the spraying mechanism of the existing leakage detection device is not good after detecting the leakage, and residual ammonia gas often diffuses outward, which has certain safety hazards. UTILITY MODEL CONTENTS

[0003] In order to solve the problems in the prior art, the utility model provides a liquid ammonia storage tank leakage detection mechanism. The device can effectively detect the leakage of the liquid ammonia storage tank. After a leakage accident occurs, the turnover plate can swing close to the storage tank and spray clean water to effectively absorb the leaked ammonia gas. The spraying and adsorption effect is excellent, and ammonia gas can be effectively prevented from diffusing outward.

[0004] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0005] A liquid ammonia storage tank leakage detection mechanism, comprising a support and a plurality of detectors for detecting ammonia gas, wherein the liquid ammonia storage tank is horizontally installed on the support, and the detectors are installed on the liquid ammonia storage tank; a top plate is horizontally arranged above the liquid ammonia storage tank along the length direction thereof, and vertical rods are perpendicularly and fixedly connected to the both ends of the top plate downward, and the vertical rods are installed on the ground; two turnover plates are symmetrically arranged on the both sides of the top plate, and the turnover plates are rotatably connected to the top plate close to the edges of the top plate; a turnover driving assembly is installed on the vertical rods, the turnover driving assembly is connected with the two turnover plates, and is used for driving the two turnover plates to synchronously rotate downward to the both sides of the liquid ammonia storage tank; a plurality of spray heads are installed on the bottom of the turnover plate, and the spray heads are connected with a water supply mechanism in communication.

[0006] Preferably, the water supply mechanism comprises a water tank and a water pump, a water conveying cavity is arranged in the turnover plate, the spray heads are in communication with the water conveying cavity; a water inlet head in communication with the water conveying cavity is arranged on the top of the turnover plate, the water inlet head is connected with the water outlet of the water pump through a water pipe, and the water inlet of the water pump is in communication with the water outlet of the water tank.

[0007] Preferably, the water pipe adopts a flexible communication pipe.

[0008] Preferably, a water storage pool is arranged around the lower part of the liquid ammonia storage tank, and the support is installed in the water storage pool.

[0009] Preferably, a drain port is arranged on the lower side wall of the water storage pool, and the drain port is connected to the recovery system through a control valve.

[0010] Preferably, the turnover plate is an arc-shaped plate, and the edge of the arc-shaped plate is rotationally connected with the edge of the top plate.

[0011] Preferably, the turnover driving assembly comprises a hydraulic cylinder and two sets of symmetrically arranged linkage mechanisms, the two linkage mechanisms are vertically installed on the side end of the vertical rod and the side end of the top plate and are connected with the end face of the two turnover plates; the linkage mechanism comprises a first linkage rod, a second linkage rod and a swing plate, the lower end of the swing plate is rotationally connected with the vertical rod fixed on the top plate through a first rotating shaft, one side of the upper end of the swing plate is rotationally connected with one end of the first linkage rod, and the other end of the first linkage rod is rotationally connected with the turnover plate below and close to the side of the top plate; the other side of the upper end of the swing plate is rotationally connected with the upper end of the second linkage rod; the hydraulic cylinder is vertically arranged upwards, and the tail of the hydraulic cylinder is rotationally installed on the vertical rod; the lower end of the second linkage rod of the two linkage mechanisms is rotationally connected with the piston rod of the hydraulic cylinder.

[0012] The utility model has the beneficial effect that:

[0013] 1. When the turnover plate is in a non-spraying operation state, the turnover driving assembly lifts it to be on both sides of the top plate, at this time, the turnover plate plays the role of the ceiling, and can effectively protect the liquid nitrogen storage tank below. When the detector detects that the liquid nitrogen storage tank leaks, the turnover driving assembly acts to drive the turnover plates on both sides to turn down, so that they swing to the left and right sides of the liquid nitrogen storage tank, and then the water pump in the water tank is pumped to the spraying head inside the turnover plate. Since the turnover plate is arc-shaped, it can better adapt to the outer wall of the liquid nitrogen storage tank, and the water mist sprayed by the spraying head can completely cover the liquid nitrogen storage tank from both sides, so that the leaked ammonia gas can be effectively absorbed, and ammonia gas overflow is avoided.

[0014] 2. When a leakage accident occurs, the hydraulic cylinder of the utility model contracts downwards, the swing plate is pulled by the second linkage rod to rotate and swing around the first rotating shaft to the central vertical rod, and then the first linkage rod drives the turnover plate to rotate and swing downwards to the side of the liquid nitrogen storage tank, and the spraying head sprays water mist to absorb ammonia gas, effectively preventing diffusion. After the danger of the accident is eliminated, the hydraulic cylinder is elongated upwards, the swing plate is reversely rotated by the second linkage rod, the first linkage rod lifts the turnover plate upwards to reset, and thus the quick resetting operation of the turnover plate is completed, which is very convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a structural schematic view of the utility model;

[0016] Fig. 2 is a structural schematic view of the water conveying cavity in the turnover plate of the utility model. DETAILED DESCRIPTION

[0017] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of application of this utility model.

[0018] like Figs. 1-2 As shown, this utility model proposes a liquid ammonia storage tank leak detection mechanism, including a support 12 and multiple detectors 51 for detecting ammonia gas. The liquid ammonia storage tank 5 is horizontally installed on the support 12. A water storage pool 1 is provided around the bottom of the liquid ammonia storage tank 5, and the support 12 is installed in the water storage pool 1. When a leak occurs and water is sprayed, the water pool 1 can effectively store water, preventing the sprayed water from flowing out and facilitating the recycling of wastewater after ammonia gas adsorption. Multiple detectors 51 are evenly installed on the outer wall of the liquid ammonia storage tank 5, which can perform all-round leak detection of the liquid ammonia storage tank 5.

[0019] A top plate 4 is horizontally installed along the length of the liquid ammonia storage tank 5. Vertical poles 3 are fixed downwards at both ends of the top plate 4 and are installed on the ground. Two symmetrically arranged tilting plates 6 are located on the left and right sides of the top plate 4. The tilting plates 6 are arc-shaped, and their edges are rotatably connected to the edges of the top plate 4. A tilting drive assembly is installed on the poles 3, connected to the two tilting plates 6, and used to drive the two tilting plates 6 to rotate synchronously downwards to the sides of the liquid ammonia storage tank 5. Multiple spray heads 62 are installed at the bottom of the tilting plates 6, and these spray heads 62 are connected to a water supply mechanism. The water supply mechanism includes a water tank 2 and a water pump 21. A water delivery chamber 60 is provided inside the tilting plate 6, and the spray heads 62 communicate with the water delivery chamber 60. A water inlet 61, connected to the water delivery chamber 60, is located at the top of the tilting plate 6. The water inlet 61 is connected to the outlet of the water pump 21 via a water pipe, and the inlet of the water pump 21 is connected to the outlet of the water tank 2. Water from water tank 2 is pumped by water pump 21 through a water pipe into the water delivery chamber 60 inside the tilting plate 6. Water mist is then sprayed outwards from the spray head 62, effectively absorbing leaked ammonia gas. The water pipe is a flexible connecting pipe, which delivers water to the tilting plate 6 without affecting its tilting action. A drain outlet 11 is provided on the lower side wall of the water storage tank 1. The drain outlet 11 is connected to a recovery system via a control valve 111. This recovery system can recycle the water containing ammonia gas, improving resource utilization.

[0020] When the turnover plate 6 is in a non-spraying operation state, the turnover driving assembly is lifted to be on both sides of the top plate 4, at this time, the turnover plate 6 plays a role of a ceiling, and can effectively protect the liquid nitrogen storage tank 5 below. When the detector 51 detects that the liquid nitrogen storage tank 5 leaks, the turnover driving assembly is driven to make the two side turnover plates 6 turn down, so that the two side turnover plates 6 are swung to the left and right sides of the liquid nitrogen storage tank 5, and then the water pump 21 in the water tank 2 is used to spray water to the spraying head 62 on the inner side of the turnover plate 6, since the turnover plate 6 is designed in an arc shape and can better adapt to the outer wall of the liquid nitrogen storage tank 5, the water mist sprayed by the spraying head 62 can completely cover the liquid nitrogen storage tank 5 from both sides, so that the leaked ammonia gas can be effectively absorbed, and ammonia gas overflow is avoided.

[0021] The turnover driving assembly comprises a hydraulic cylinder 71 and two groups of symmetrically arranged connecting rod mechanisms, the two connecting rod mechanisms are vertically installed on the side ends of the vertical rod 3 and the top plate 4 and are connected with the end faces of the two turnover plates 6; the connecting rod mechanism comprises a first connecting rod 74, a second connecting rod 72 and a swing plate 73, the lower end of the swing plate 73 is rotationally connected to the vertical rod 41 fixedly connected below the top plate 4 through a first rotating shaft, one side of the upper end of the swing plate 73 is rotationally connected to one end of the first connecting rod 74, and the other end of the first connecting rod 74 is rotationally connected below the turnover plate 6 close to the side of the top plate 4; the other side of the upper end of the swing plate 73 is rotationally connected to the upper end of the second connecting rod 72; the hydraulic cylinder 71 is vertically arranged upwards, and the tail part thereof is rotationally installed on the vertical rod 3; the lower ends of the second connecting rods 72 of the two connecting rod mechanisms are rotationally connected to the piston rod of the hydraulic cylinder 71.

[0022] When a leakage accident occurs, the hydraulic cylinder 71 is contracted downwards, the swing plate 73 is pulled by the second connecting rod 72 to rotate and swing in the direction of the middle vertical rod 3 as the center of the first rotating shaft, and then the first connecting rod 74 drives the turnover plate 6 to rotate and swing downwards to the side of the liquid nitrogen storage tank 5, water mist is sprayed by the spraying head 62 to absorb ammonia gas, and diffusion is effectively prevented. After the danger of the accident is eliminated, the hydraulic cylinder 71 is elongated upwards, the swing plate 73 is reversely rotated through the second connecting rod 72, the first connecting rod 74 lifts the turnover plate 6 upwards to reset, and thus the quick resetting operation of the turnover plate 6 is completed, and the use is very convenient.

[0023] When the detector 51 detects that the liquid ammonia storage tank 5 leaks, the control system controls the hydraulic cylinder 71 to contract, the second connecting rod 72, the swing plate 73 and the first connecting rod 74 are cooperatively connected and driven to make the turnover plate 6 rotate and swing downwards, so that the turnover plate 6 is rotated to the left and right sides of the liquid nitrogen storage tank 5, and then the water pump 21 in the water tank 2 is used to spray water to the spraying head 62 on the inner side of the turnover plate 6, the water mist sprayed by the spraying head 62 can completely cover the liquid nitrogen storage tank 5 from both sides, so that the leaked ammonia gas can be effectively absorbed, and ammonia gas overflow is avoided.

[0024] Obviously, the above-described embodiments are only some embodiments but not all the embodiments of the present application, the preferred embodiments of the present application are shown in the drawings, but do not limit the patent scope of the present application. The present application can be implemented in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent replacements to some technical features therein. Any equivalent structure made by using the content of the specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A liquid ammonia storage tank leakage detection mechanism comprising a support and a plurality of detectors for detecting ammonia gas, characterized in that: The liquid ammonia storage tank is horizontally installed on a support, and the detector is installed on the liquid ammonia storage tank; a top plate is horizontally arranged above the liquid ammonia storage tank along the length direction of the liquid ammonia storage tank, vertical rods are fixedly connected to the two ends of the top plate downwards, and the vertical rods are installed on the ground; two turnover plates are symmetrically arranged on the two sides of the top plate, and the turnover plates are rotatably connected to the top plate near the edges of the top plate; a turnover driving assembly is installed on the vertical rods, the turnover driving assembly is connected with the two turnover plates, and is used for driving the two turnover plates to synchronously rotate downwards to the two sides of the liquid ammonia storage tank; a plurality of spray heads are installed on the bottom of the turnover plate, and the spray heads are connected with a water supply mechanism in communication.

2. The liquid ammonia storage tank leak detection mechanism of claim 1, wherein: The water supply mechanism comprises a water tank and a water pump, a water conveying cavity is arranged in the turnover plate, the spray heads are in communication with the water conveying cavity; a water inlet head in communication with the water conveying cavity is arranged on the top of the turnover plate, the water inlet head is connected with the water outlet of the water pump through a water pipe, and the water inlet of the water pump is in communication with the water outlet of the water tank.

3. The liquid ammonia storage tank leak detection mechanism of claim 2, wherein: The water pipe is a flexible communication pipe.

4. The liquid ammonia storage tank leak detection mechanism of claim 1, wherein: A water storage pool is arranged around the lower side of the liquid ammonia storage tank, and the support is installed in the water storage pool.

5. The liquid ammonia storage tank leak detection mechanism of claim 4, wherein: A drain port is arranged on the sidewall below the water storage pool, and the drain port is connected with a recovery system through a control valve.

6. The liquid ammonia storage tank leak detection mechanism of claim 1, wherein: The turnover plate is an arc-shaped plate, and the edge of the arc-shaped plate is rotatably connected with the edge of the top plate.

7. The liquid ammonia storage tank leak detection mechanism of claim 1, wherein: The turnover driving assembly comprises a hydraulic cylinder and two groups of symmetrically arranged connecting rod mechanisms, the two connecting rod mechanisms are vertically installed on the side ends of the vertical rods and the top plate and are connected with the end faces of the two turnover plates; the connecting rod mechanism comprises a first connecting rod, a second connecting rod and a swing plate, the lower end of the swing plate is rotatably connected to the vertical rod fixedly connected to the top plate through a first rotating shaft, one side of the upper end of the swing plate is rotatably connected to one end of the first connecting rod, the other end of the first connecting rod is rotatably connected to the lower side of the turnover plate close to the top plate; the other side of the upper end of the swing plate is rotatably connected to the upper end of the second connecting rod; the hydraulic cylinder is vertically arranged upwards, and the tail of the hydraulic cylinder is rotatably installed on the vertical rod; the lower ends of the second connecting rods of the two connecting rod mechanisms are rotatably connected to the piston rods of the hydraulic cylinder.

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