Emergency cut-off pressure relief device for liquid ammonia discharge

Abstract

The invention discloses a liquid ammonia unloading emergency cut-off pressure relief device and belongs to the field of liquid ammonia unloading, the liquid ammonia unloading emergency cut-off pressure relief device comprises a liquid ammonia storage tank, a base and a treatment box, the liquid ammonia storage tank is arranged on the back of the base, a transverse plate is arranged at the top of the base, an unloading compressor is fixedly connected to the top of the transverse plate, and the treatment box is arranged on the left side of the base. According to the mixing mechanism, the piston is driven by the electric push rod to do reciprocating motion in the runner pipe, and the efficient water circulating pump is formed through cooperation of the first one-way valve and the second one-way valve. The mechanism can continuously suck water at the bottom of the treatment box and spray the water to an upper water area at a high speed to form strong directional water flow and disturbance, so that the introduced ammonia gas and the water are forcibly, dynamically and violently mixed, a slow mode depending on natural diffusion of gas in traditional static contact is thoroughly broken through, and the service life of the ammonia gas is prolonged. The contact area and the contact time of a gas phase and a liquid phase are greatly increased, so that the dissolving speed and the absorption efficiency of ammonia gas are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of liquid ammonia unloading, and more specifically, to an emergency shut-off and pressure relief device for liquid ammonia unloading. Background Technology

[0002] Currently, the processing of chemical raw materials such as liquid ammonia and pharmaceutical raw materials often involves multiple processing stages. In order to meet different processing techniques, ensure product quality, and achieve effective and refined processing, batches of related raw materials often need to be transferred between multiple processing stages. The transfer process involves the loading and unloading of related materials.

[0003] In existing technologies, after an emergency shut-off valve closes, high-pressure liquid ammonia remains in a closed pipeline. If this liquid vaporizes due to ambient heat, it generates extremely high pressure, posing a risk of pipeline rupture. Pressure relief devices are used to handle this residue. Typically, pressure relief involves passing ammonia gas into water to create a diluted ammonia solution for further processing. However, the contact between ammonia gas and water is generally static, resulting in poor mixing and impacting subsequent treatment. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an emergency shut-off and pressure relief device for liquid ammonia unloading, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this application provides an emergency shut-off and pressure relief device for unloading liquid ammonia, comprising a liquid ammonia storage tank, a base, and a treatment box. The liquid ammonia storage tank is located on the back of the base, and a horizontal plate is provided on the top of the base. An unloading compressor is fixedly connected to the top of the horizontal plate. The treatment box is located on the left side of the base, and water is placed inside the treatment box. A first conveying pipe is provided connecting the unloading compressor and the liquid ammonia storage tank, and a second conveying pipe is provided connecting the first conveying pipe and the treatment box. A first solenoid valve is provided on the top of the first conveying pipe, and a second solenoid valve is provided on the top of the second conveying pipe. A mixing mechanism is provided inside the treatment box, and the mixing mechanism includes a fixed plate and a flow pipe. The fixed plate is fixedly connected to the inner wall of the treatment box, and the fixed plate is fixedly connected to the outer wall of the flow pipe.

[0006] Preferably, an electric push rod is fixedly connected to the inner wall of the right side of the processing box, and a piston is fixedly connected to the left side of the electric push rod. The piston is slidably connected to the inner wall of the flow pipe. A first one-way valve and a second one-way valve are provided on the inner wall of the flow pipe. The first one-way valve is located above the second one-way valve. During normal unloading, the first solenoid valve is open and the second solenoid valve is closed. The unloading compressor starts, and liquid ammonia is transported from the tanker to the liquid ammonia storage tank through the first delivery pipe. During this process, the mixing mechanism and the agitation mechanism are in a standby and static state. In case of emergencies such as leakage or fire, the control system receives a gas detector signal and immediately issues an instruction. The first solenoid valve quickly closes, cutting off the main liquid ammonia delivery channel. Almost simultaneously, the second solenoid valve opens, providing a release channel for the residual liquid ammonia in the pipeline sealed between the two valves. The residual liquid ammonia is introduced into the flow pipe of the treatment tank through the second delivery pipe. The signal of the second solenoid valve opening synchronously triggers the electric push rod of the mixing mechanism to start. The electric push rod drives the piston to reciprocate in the flow pipe. When the piston moves to the right, a negative pressure is formed in the flow pipe. The first one-way valve closes and the second one-way valve opens, and water at the bottom of the treatment tank is drawn into the flow pipe. When the piston moves to the left, the water in the pipe is pressurized. The second one-way valve closes and the first one-way valve opens, and water is sprayed out at high speed from the top. This process forces the released ammonia gas and the high-speed water jet to mix for the first time near the outlet of the flow pipe.

[0007] Preferably, a square plate is fixedly connected to the outer wall of the electric push rod, and a rack is fixedly connected to the back of the square plate. A first rotating rod is rotatably connected to the bottom inner wall of the processing box. A gear is fixedly connected to the outer wall of the first rotating rod, and the gear meshes with the rack. A scattering disc is fixedly connected to the top of the first rotating rod. While the electric push rod reciprocates, it drives the square plate and rack on its outer wall to move synchronously. The rack drives the gear meshing with it to rotate alternately in both directions. The gear drives the first rotating rod and the scattering disc on its top to rotate reciprocally. The scattering disc disperses the water sprayed from the mixing mechanism, forming finer water droplets that are then evenly scattered, achieving secondary distribution of the water and greatly increasing the contact area with ammonia. The mixing mechanism of this application, driven by the electric push rod, reciprocates within the flow pipe. Combined with the cooperation of the first and second one-way valves, it constitutes a highly efficient water circulation pump. This device continuously draws water from the bottom of the treatment tank and sprays it at high speed to the upper water area, creating a powerful directional water flow and disturbance. This forces the introduced ammonia gas to mix dynamically and violently with the water, completely breaking the slow mode of natural gas diffusion in traditional static contact. This greatly increases the contact area and contact time between the gas and liquid phases, thus significantly improving the dissolution rate and absorption efficiency of ammonia gas. Furthermore, through the meshing transmission of rack and pinion gears, the linear motion of the electric push rod is converted into the rotational motion of the dispersion disc. This dispersion disc, located above the water surface, breaks up the water droplets thrown up by the circulating pump, forming finer droplets that are evenly distributed and fall back like a "shower." This process achieves secondary breaking and distribution of the water, further increasing the gas-liquid contact surface area, and blocking and secondary absorbing rising ammonia bubbles, ensuring the comprehensiveness and thoroughness of the absorption effect and effectively preventing ammonia gas from escaping due to insufficient mixing.

[0008] Preferably, the processing box is provided with a disturbance mechanism, which includes an abutting rod fixedly connected to the bottom of a rack. A second rotating rod is rotatably connected to the inner wall of the processing box, and a push plate is fixedly connected to the outer wall of the second rotating rod. The push plate contacts the abutting rod.

[0009] Preferably, a torsion spring is wound around the outer wall of the second rotating rod, and three baffles are fixedly connected to the outer wall of the second rotating rod. When the rack reciprocates, the abutment rod at its bottom moves accordingly. The abutment rod periodically pushes the push plate, causing the second rotating rod to swing against the force of the torsion spring. When the abutment rod leaves, the second rotating rod returns to its original position under the action of the torsion spring. The reciprocating swing of the second rotating rod drives the multiple baffles on it to move in the water, generating multidimensional turbulence at the bottom of the treatment tank, completely eliminating the stagnant zone, and ensuring that ammonia can be fully absorbed throughout the entire tank.

[0010] Preferably, there are two mixing and agitation mechanisms, located on the left and right sides inside the treatment tank. The agitation mechanism drives a contact rod via a rack and pinion mechanism, periodically actuating a push plate with a torsion spring return mechanism, thereby causing multiple agitator plates to oscillate back and forth at the bottom of the treatment tank. These agitator plates generate non-directional, multi-dimensional turbulence within the tank, complementing the directional water flow generated by the mixing mechanism. This composite flow field effectively eliminates potential "stagnant zones" or "short-circuit flows" within the tank, ensuring that all water areas are fully agitated and participate in the absorption reaction. This avoids excessively high ammonia concentrations in localized areas leading to absorption saturation, thus comprehensively improving the utilization rate and absorption efficiency of the entire treatment tank volume.

[0011] Preferably, the top of the base is provided with a shock-absorbing mechanism, the shock-absorbing mechanism includes a base, the base is fixedly connected to the top of the base, and a top sleeve is movably fitted on the outer wall of the base, the top sleeve being fixedly connected to the cross plate.

[0012] Preferably, the base has a groove inside, and a slider is slidably connected inside the groove. A support rod is hinged between the slider and the cross plate, and a first spring is fixedly connected between the slider and the groove. If one side of the cross plate sinks, the support rod on that side will push the slider to move outward of the groove and stretch or compress the first spring on that side. If the cross plate wobbles horizontally, the support rod will also force the slider to slide, with the first spring providing the restoring force. The deformation of the first spring effectively absorbs the horizontal impact energy, and through its elastic restoring force, it always tends to pull the cross plate back to its equilibrium center position, greatly enhancing the anti-sway and stability of the equipment under complex working conditions.

[0013] Preferably, a damping rod is fixedly connected inside the base, the damping rod is fixedly connected to the cross plate, and a second spring is sleeved on the outer wall of the damping rod.

[0014] Preferably, a first buffer airbag is fixedly connected inside the base, and a second buffer airbag is fixedly connected to the bottom of the cross plate. The first and second buffer airbags are in contact. When the unloading compressor starts or an external impact causes vertical vibration, the vibration is transmitted through the cross plate to the piston rod of the damping rod fixedly connected to it and the top sleeve. The top sleeve transmits the force downward to the base and compresses the second spring inside it. At the same time, the piston inside the damping rod moves in the hydraulic oil. The oil generates huge frictional resistance through the narrow gaps, converting the vibration kinetic energy into heat energy and dissipating it. During this stage, the second spring absorbs the impact energy, while the damping rod is mainly responsible for rapidly dissipating the energy and preventing the spring from constantly rebounding, thereby achieving rapid stabilization. When there is a horizontal component of vibration or the equipment twists due to off-center load, the movement of the cross plate will drive the support rod hinged to it to move. The support rod will push the slider to slide in the groove. The shock absorption mechanism of this application constitutes a multi-stage energy-dissipating shock absorption system through the synergistic action of the damping rod, the first spring, the second spring, and the first and second buffer airbags. When the tank truck or external environment causes vibration and impact, this mechanism can efficiently attenuate and absorb vibration energy through the deformation of the springs, the oil friction of the damping rods, and the compression deformation of the buffer airbags. This effectively prevents vibration from being directly transmitted to the precision unloading compressor and connected piping system, ensuring its long-term operational stability and reliability, extending the equipment's service life. Furthermore, it not only provides vertical buffering but also, through the hinged and sliding cooperation of the support rods, sliders, and chutes, can handle a certain degree of lateral sway or off-center loading, providing comprehensive stable support for the upper horizontal plate and equipment. This design ensures that under dynamic working conditions, the connecting pipelines will not experience stress concentration or leakage risks due to excessive equipment displacement, maintaining the structural integrity and sealing safety of the entire unloading system.

[0015] The advantages of this application are: (1) The mixing mechanism of this application uses an electric push rod to drive a piston to reciprocate within the flow pipe. Combined with the cooperation of the first and second one-way valves, it forms a highly efficient water circulation pump. This mechanism can continuously draw water from the bottom of the treatment tank and spray it at high speed to the upper water area, forming a powerful directional water flow and disturbance. This forces the introduced ammonia gas to mix dynamically and violently with the water, completely breaking the slow mode of natural gas diffusion in traditional static contact. This greatly increases the contact area and contact time between the gas and liquid phases, thereby significantly improving the dissolution rate and absorption efficiency of ammonia gas. Furthermore, through the meshing transmission of rack and pinion, the linear motion of the electric push rod is converted into the rotational motion of the scattering disc. The scattering disc is located above the water surface and can break up the water droplets thrown up by the circulation pump, forming finer water droplets that are evenly scattered and fall back like a "shower". This process achieves secondary breaking and distribution of the water body, further increasing the gas-liquid contact surface area, and blocking and absorbing the rising ammonia bubbles, ensuring the comprehensiveness and thoroughness of the absorption effect, and effectively preventing ammonia from escaping due to insufficient mixing.

[0016] (2) The disturbance mechanism of this application drives the contact rod through rack and pinion motion, periodically actuating the push plate with torsion spring reset, thereby causing multiple disturbance plates to oscillate back and forth at the bottom of the treatment tank. These disturbance plates generate non-directional, multi-dimensional turbulence in the tank, which complements the directional water flow generated by the mixing mechanism. This composite flow field can effectively eliminate the "stagnant zone" or "short-circuit flow" that may exist in the water in the tank, ensuring that the water in all areas can be fully stirred and participate in the absorption reaction, avoiding excessively high ammonia concentration in local areas and absorption saturation, thereby comprehensively improving the utilization rate and absorption efficiency of the entire treatment tank volume.

[0017] (3) The shock absorption mechanism of this application constitutes a multi-stage energy-dissipating shock absorption system through the synergistic action of the damping rod, the first spring, the second spring, and the first and second buffer airbags. When the tank truck or the external environment brings vibration and impact, the mechanism can absorb and attenuate vibration energy step by step and efficiently through the deformation of the springs, the oil friction of the damping rods, and the compression deformation of the buffer airbags. This effectively prevents vibration from being directly transmitted to the precision unloading compressor and the connected pipeline system, ensuring its long-term stability and reliability, extending the service life of the equipment, and not only providing vertical buffering, but also coping with a certain degree of lateral sway or off-center loading through the hinged and sliding cooperation of the support rod, slider, and slide groove, providing all-round stable support for the upper horizontal plate and equipment. This design ensures that under dynamic working conditions, the connecting pipelines will not experience stress concentration or leakage risks due to excessive equipment displacement, maintaining the structural integrity and sealing safety of the entire unloading system. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a first sectional view of the present invention; Figure 4 This is a second sectional view of the present invention; Figure 5 This is an enlarged view of point A in the present invention; Figure 6 This is a partial view of the mixing mechanism and disturbance mechanism of the present invention; Figure 7 This is a partial schematic diagram of the shock absorption mechanism of the present invention; Figure 8 This is a cross-sectional view of the shock absorption mechanism of the present invention.

[0019] In the above image: 1. Liquid ammonia storage tank; 2. Base; 3. Horizontal plate; 4. Unloading compressor; 5. Processing tank; 61. First conveying pipe; 62. Second conveying pipe; 63. First solenoid valve; 64. Second solenoid valve; 7. Mixing mechanism; 711. Fixed plate; 712. Flow pipe; 713. Electric push rod; 714. Piston; 715. First check valve; 716. Second check valve; 717. Square plate; 718. Rack; 719. First rotating rod; 7 20. Gear; 721. Scattering disc; 8. Disturbance mechanism; 811. Contact rod; 812. Second rotating rod; 813. Spoiler; 814. Torsion spring; 815. Push plate; 9. Shock absorption mechanism; 911. Base; 912. Top sleeve; 913. Slide groove; 914. Slider; 915. First spring; 916. Support rod; 917. Damping rod; 918. Second spring; 919. First buffer airbag; 920. Second buffer airbag. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort should fall within the scope of protection of the present application.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Example 1, see Figures 1-8This embodiment provides an emergency shut-off and pressure relief device for unloading liquid ammonia, including a liquid ammonia storage tank 1, a base 2, and a processing tank 5. The liquid ammonia storage tank 1 is located on the back of the base 2, and a horizontal plate 3 is provided on the top of the base 2. A truck unloading compressor 4 is fixedly connected to the top of the horizontal plate 3. The processing tank 5 is located on the left side of the base 2, and water is placed inside the processing tank 5. A first conveying pipe 61 is provided to connect the truck unloading compressor 4 and the liquid ammonia storage tank 1, and a second conveying pipe 62 is provided to connect the first conveying pipe 61 and the processing tank 5. A first solenoid valve 63 is provided on the top of the first conveying pipe 61, and a second solenoid valve 64 is provided on the top of the second conveying pipe 62. The processing tank 5... An internal mixing mechanism 7 is provided, which includes a fixed plate 711 and a flow pipe 712. The fixed plate 711 is fixedly connected to the inner wall of the processing box 5 and the outer wall of the flow pipe 712. An electric push rod 713 is fixedly connected to the inner wall of the right side of the processing box 5. A piston 714 is fixedly connected to the left side of the electric push rod 713. The piston 714 is slidably connected to the inner wall of the flow pipe 712. A first one-way valve 715 and a second one-way valve 716 are provided on the inner wall of the flow pipe 712. The first one-way valve 715 is located above the second one-way valve 716. During normal unloading, the first solenoid valve 63 is open and the second solenoid valve 64 is closed.The unloading compressor 4 starts, transferring liquid ammonia from the tanker to the liquid ammonia storage tank 1 via the first delivery pipe 61. During this process, the mixing mechanism 7 and the agitation mechanism 8 are both in a standby, static state. In the event of an emergency such as a leak or fire, the control system receives a gas detector signal and immediately issues a command. The first solenoid valve 63 quickly closes, cutting off the main liquid ammonia delivery route. Almost simultaneously, the second solenoid valve 64 opens, providing a release route for the residual liquid ammonia trapped in the pipe between the two valves. The residual liquid ammonia is then released via the second delivery pipe... The water is introduced into the flow pipe 712 of the treatment tank 5 through pipe 62. The signal from the opening of the second solenoid valve 64 synchronously triggers the electric push rod 713 of the mixing mechanism 7 to start. The electric push rod 713 drives the piston 714 to reciprocate within the flow pipe 712. When the piston 714 moves to the right, a negative pressure is formed within the flow pipe 712, the first one-way valve 715 closes, and the second one-way valve 716 opens, drawing water from the bottom of the treatment tank 5 into the flow pipe 712. When the piston 714 moves to the left, it pressurizes the water in the pipe, and the second one-way valve 716 closes. When closed, the first one-way valve 715 opens, and water jets out at high speed from the top. This process forces the released ammonia gas and the high-speed water jet to mix for the first time near the outlet of the flow pipe 712. A square plate 717 is fixedly connected to the outer wall of the electric push rod 713, and a rack 718 is fixedly connected to the back of the square plate 717. A first rotating rod 719 is rotatably connected to the bottom inner wall of the treatment tank 5, and a gear 720 is fixedly connected to the outer wall of the first rotating rod 719. The gear 720 meshes with the rack 718. A scattering disc 721 is fixedly connected to the top. While the electric push rod 713 reciprocates, it drives the square plate 717 and rack 718 on its outer wall to move synchronously. The rack 718 drives the gear 720 meshing with it to rotate alternately in both directions. The gear 720 drives the first rotating rod 719 and the scattering disc 721 on its top to rotate back and forth. The scattering disc 721 disperses the water sprayed up by the mixing mechanism 7, forming smaller water droplets that are then evenly scattered, achieving secondary distribution of the water and greatly increasing the contact area with ammonia.

[0027] In actual use, during normal unloading, the first solenoid valve 63 is open and the second solenoid valve 64 is closed. The unloading compressor 4 starts, and liquid ammonia is transported from the tank truck to the liquid ammonia storage tank 1 through the first delivery pipe 61. During this process, the mixing mechanism 7 and the agitation mechanism 8 are in a standby static state. In case of emergencies such as leakage or fire, the control system receives a gas detector signal and immediately issues a command. The first solenoid valve 63 quickly closes, cutting off the main liquid ammonia delivery path. Almost simultaneously, the second solenoid valve 64 opens, providing a release path for the residual liquid ammonia trapped in the pipe between the two valves. The residual liquid ammonia is introduced into the flow pipe 712 of the treatment tank 5 through the second delivery pipe 62. The signal for the second solenoid valve 64 to open is... The electric push rod 713 of the synchronous trigger mixing mechanism 7 is started. The electric push rod 713 drives the piston 714 to reciprocate in the flow pipe 712. When the piston 714 moves to the right, a negative pressure is formed in the flow pipe 712. The first one-way valve 715 closes and the second one-way valve 716 opens. Water at the bottom of the treatment tank 5 is sucked into the flow pipe 712. When the piston 714 moves to the left, the water in the pipe is pressurized. The second one-way valve 716 closes and the first one-way valve 715 opens. The water is sprayed out at high speed from the top. This process forces the released ammonia gas and the high-speed sprayed water to mix for the first time near the outlet of the flow pipe 712. While the electric push rod 713 reciprocates, it drives the square plate 717 and rack 718 on its outer wall to move synchronously. The rack 718 drives the gear 720 meshing with it to rotate alternately in both directions. The gear 720 drives the first rotating rod 719 and the scattering disk 721 on its top to rotate reciprocally. The scattering disk 721 disperses the water sprayed up by the mixing mechanism 7, forming smaller water droplets that are then evenly scattered, achieving secondary distribution of the water and greatly increasing the contact area with ammonia.

[0028] Example 2, see Figures 1-8 The processing box 5 is equipped with a disturbance mechanism 8, which includes an abutment rod 811 fixedly connected to the bottom of the rack 718. A second rotating rod 812 is rotatably connected to the inner wall of the processing box 5. A push plate 815 is fixedly connected to the outer wall of the second rotating rod 812, and the push plate 815 contacts the abutment rod 811. A torsion spring 814 is wound around the outer wall of the second rotating rod 812, and three baffles 813 are fixedly connected to the outer wall of the second rotating rod 812. When the rack 718 reciprocates, the abutment rod 811 at its bottom moves accordingly. The contact rod 811 periodically pushes the push plate 815, causing the second rotating rod 812 to swing against the force of the torsion spring 814. When the contact rod 811 leaves, the second rotating rod 812 returns to its original position under the action of the torsion spring 814. The reciprocating swing of the second rotating rod 812 drives multiple turbulence plates 813 on it to move in the water, generating multidimensional turbulence at the bottom of the treatment tank 5, completely eliminating the stagnant zone, and ensuring that ammonia can be fully absorbed throughout the entire tank. There are two mixing mechanisms 7 and two disturbance mechanisms 8, which are located on the left and right sides inside the treatment tank 5.

[0029] When the above-mentioned equipment is in use, the rack 718 reciprocates, and the abutment rod 811 at its bottom moves accordingly. The abutment rod 811 periodically pushes the push plate 815, causing the second rotating rod 812 to swing against the force of the torsion spring 814. When the abutment rod 811 leaves, the second rotating rod 812 returns to its original position under the action of the torsion spring 814. The reciprocating swing of the second rotating rod 812 drives the multiple baffles 813 on it to move in the water, generating multidimensional turbulence at the bottom of the treatment tank 5, completely eliminating the stagnant zone, and ensuring that ammonia can be fully absorbed throughout the entire tank.

[0030] Example 3, see Figures 1-8 The base 2 is provided with a shock-absorbing mechanism 9 on its top. The shock-absorbing mechanism 9 includes a base 911, which is fixedly connected to the top of the base 2. A top sleeve 912 is movably fitted on the outer wall of the base 911. The top sleeve 912 is fixedly connected to the horizontal plate 3. A sliding groove 913 is provided inside the base 2. A slider 914 is slidably connected inside the sliding groove 913. A support rod 916 is hinged between the slider 914 and the horizontal plate 3. A first spring 915 is fixedly connected between the slider 914 and the sliding groove 913. If one side of the horizontal plate 3 sinks, the support rod 916 on that side will push the slider 914 to move outward of the sliding groove 913 and stretch or compress the first spring 915 on that side. If the horizontal plate 3 swings horizontally, the support rod 916 will also force the slider 914 to slide, and the first spring 915 will provide the restoring force. The deformation of the first spring 915 effectively absorbs the horizontal impact energy, and through its elastic restoring force, it always tends to pull the horizontal plate 3 back to its equilibrium center position, greatly enhancing the anti-sway and stability of the equipment under complex working conditions. A damping rod 917 is fixedly connected inside the base 911, and the damping rod 917 is fixedly connected to the horizontal plate 3. A second spring 918 is sleeved on the outer wall of the damping rod 917. A first buffer airbag 919 is fixedly connected inside the base 911, and a second buffer airbag 920 is fixedly connected to the bottom of the horizontal plate 3. The first buffer airbag 919 and the second buffer airbag 920 are in contact. When the unloading compressor 4 starts or external impact causes vertical vibration, the vibration is transmitted through the horizontal plate 3 to the piston rod of the damping rod 917 and the top sleeve 912, which are fixedly connected to it. The top sleeve 912 transmits the force downward to the base 911 and compresses the second spring 918 inside it. Simultaneously, the piston inside the damping rod 917 moves in the hydraulic oil. The oil generates significant frictional resistance through narrow gaps, converting the vibrational kinetic energy into heat energy for dissipation. During this stage, the second spring 918 absorbs the impact energy, while the damping rod 917 is primarily responsible for rapidly dissipating the energy and preventing the spring from continuously rebounding, thus achieving rapid stabilization. When the vibration has a horizontal component or the equipment twists due to off-center loading, the movement of the cross plate 3 will drive the hinged support rod 916 to move. The support rod 916 will then push the slider 914 to slide within the groove 913.

[0031] In practical use, when the unloading compressor 4 starts or an external impact causes vertical vibration, the vibration is transmitted through the cross plate 3 to the piston rod of the damping rod 917 and the top sleeve 912, which are fixedly connected to it. The top sleeve 912 transmits the force downward to the base 911 and compresses the second spring 918 inside it. At the same time, the piston inside the damping rod 917 moves in the hydraulic oil. The oil generates huge frictional resistance through the narrow gaps, converting the vibration kinetic energy into heat energy and dissipating it. During this stage, the second spring 918 absorbs the impact energy, while the damping rod 917 is mainly responsible for rapidly dissipating the energy and preventing the spring from constantly rebounding, thereby achieving rapid stabilization. When there is a horizontal component of vibration or the equipment twists due to off-center load, the movement of the cross plate 3 will drive the support rod 916, which is hinged to it, to move. The support rod 916 will push the slider 914 to slide in the groove 913. If one side of the horizontal plate 3 sinks, the support rod 916 on that side will push the slider 914 to move outward of the slide groove 913, and stretch or compress the first spring 915 on that side. If the horizontal plate 3 wobbles horizontally, the support rod 916 will also force the slider 914 to slide, with the first spring 915 providing the restoring force. The deformation of the first spring 915 effectively absorbs the impact energy in the horizontal direction, and through its elastic restoring force, it always tends to pull the horizontal plate 3 back to its equilibrium center position, greatly enhancing the anti-sway and stability of the equipment under complex working conditions.

[0032] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An emergency shut-off and pressure relief device for unloading liquid ammonia, comprising a liquid ammonia storage tank (1), a base (2), and a processing tank (5), characterized in that, The liquid ammonia storage tank (1) is located on the back of the base (2). A horizontal plate (3) is provided on the top of the base (2). A truck unloading compressor (4) is fixedly connected to the top of the horizontal plate (3). The processing box (5) is located on the left side of the base (2). Water is placed inside the processing box (5). A first conveying pipe (61) is provided between the truck unloading compressor (4) and the liquid ammonia storage tank (1). A second conveying pipe (62) is provided between the first conveying pipe (61) and the processing box (5). A first solenoid valve (63) is provided on the top of the first conveying pipe (61). A second solenoid valve (64) is provided on the top of the second conveying pipe (62). The processing box (5) is equipped with a mixing mechanism (7), which includes a fixing plate (711) and a flow pipe (712). The fixing plate (711) is fixedly connected to the inner wall of the processing box (5) and the fixing plate (711) is fixedly connected to the outer wall of the flow pipe (712).

2. The emergency shut-off and pressure relief device for liquid ammonia unloading according to claim 1, characterized in that, An electric push rod (713) is fixedly connected to the inner wall of the right side of the processing box (5), and a piston (714) is fixedly connected to the left side of the electric push rod (713). The piston (714) is slidably connected to the inner wall of the flow pipe (712). A first one-way valve (715) and a second one-way valve (716) are provided on the inner wall of the flow pipe (712). The first one-way valve (715) is located above the second one-way valve (716).

3. The emergency shut-off and pressure relief device for liquid ammonia unloading according to claim 2, characterized in that, A square plate (717) is fixedly connected to the outer wall of the electric push rod (713), and a rack (718) is fixedly connected to the back of the square plate (717). A first rotating rod (719) is rotatably connected to the bottom inner wall of the processing box (5). A gear (720) is fixedly connected to the outer wall of the first rotating rod (719). The gear (720) meshes with the rack (718). A scattering disc (721) is fixedly connected to the top of the first rotating rod (719).

4. The emergency shut-off and pressure relief device for liquid ammonia unloading according to claim 1, characterized in that, The processing box (5) is equipped with a disturbance mechanism (8), which includes an abutment rod (811). The abutment rod (811) is fixedly connected to the bottom of the rack (718). The inner wall of the processing box (5) is rotatably connected to a second rotating rod (812). The outer wall of the second rotating rod (812) is fixedly connected to a push plate (815). The push plate (815) contacts the abutment rod (811).

5. The emergency shut-off and pressure relief device for liquid ammonia unloading according to claim 4, characterized in that, The outer wall of the second rotating rod (812) is provided with a torsion spring (814), and three spoilers (813) are fixedly connected to the outer wall of the second rotating rod (812).

6. The emergency shut-off and pressure relief device for liquid ammonia unloading according to claim 5, characterized in that, The number of mixing mechanism (7) and disturbance mechanism (8) is two, and they are located on the left and right sides inside the processing box (5).

7. The emergency shut-off and pressure relief device for liquid ammonia unloading according to claim 6, characterized in that, The base (2) is provided with a shock-absorbing mechanism (9) at its top. The shock-absorbing mechanism (9) includes a base (911), which is fixedly connected to the top of the base (2). The outer wall of the base (911) is movably fitted with a top sleeve (912), which is fixedly connected to the horizontal plate (3).

8. The emergency shut-off and pressure relief device for liquid ammonia unloading according to claim 7, characterized in that, The base (2) has a groove (913) inside, and a slider (914) is slidably connected inside the groove (913). A support rod (916) is hinged between the slider (914) and the cross plate (3). A first spring (915) is fixedly connected between the slider (914) and the groove (913).

9. The emergency shut-off and pressure relief device for liquid ammonia unloading according to claim 8, characterized in that, A damping rod (917) is fixedly connected inside the base (911). The damping rod (917) is fixedly connected to the horizontal plate (3). A second spring (918) is sleeved on the outer wall of the damping rod (917).

10. The emergency shut-off and pressure relief device for liquid ammonia unloading according to claim 9, characterized in that, The base (911) is fixedly connected to a first buffer airbag (919), and the bottom of the horizontal plate (3) is fixedly connected to a second buffer airbag (920). The first buffer airbag (919) and the second buffer airbag (920) are in contact.

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