Liquid ammonia mass flow detection device and method

Abstract

This invention relates to a liquid ammonia mass flow rate detection device and method, belonging to the technical field of detection devices. It includes a stirring and feeding device, a cooling and conveying device, a leak detection device, a flow rate detection device, and a recooling device. The flow rate detection device includes a feeding pipe, a flow meter, and a display screen. The bottom end of the flow meter is connected to the feeding pipe, and the top end is connected to the display screen. When gas flows in, the flow meter will detect it and then generate a value on the display screen.

Description

Technical Field

[0001] This invention belongs to the field of detection devices, and more specifically, relates to a liquid ammonia mass flow detection device and method. Background Technology

[0002] Ammonia gas flow meters can detect the volume of ammonia gas, helping to determine its concentration and density.

[0003] A search revealed a Chinese utility model patent titled "A Refrigerant Preparation Device" (application number: CN201020185353.0, application date: 2010-05-10). The device includes a frame, with a liquid ammonia storage unit and a refrigerant preparer arranged above and below the frame. The opening at the bottom of the liquid ammonia storage unit is connected to the opening at the bottom of the refrigerant preparer via a connecting pipe. A switch control valve is installed on the connecting pipe. The outlet at the bottom of the liquid ammonia storage unit is also connected to a liquid ammonia filling pipe, which is equipped with a liquid ammonia filling control valve. A four-way connector is located at the top of the refrigerant preparer. One port of the four-way connector is connected to the refrigerant preparer, and the other three ports are respectively connected to a water inlet pipe, a vacuum device, and a helium connecting pipe. The opening at the bottom of the refrigerant preparer is connected to a refrigerant outlet pipe. This invention is a relatively independent device that can pre-prepare the refrigerant before it is delivered to the charging machine. It eliminates the need for additional refrigerant preparation time and does not affect the normal charging of refrigerant, thus greatly improving the charging efficiency and increasing production. However, this structure cannot achieve the cooling of liquid ammonia or the detection of its volume concentration.

[0004] This invention discloses a liquid ammonia mass flow rate detection device and method. Liquid ammonia is added by unscrewing the nut at the top of a storage tank. After stirring, it flows from the outlet at the bottom of the storage tank into a transmission pipe. The flow of liquid ammonia is controlled by opening and closing a valve. Outside air enters the storage tank through a suction pipe and a blower via a coolant, where it is cooled. The cooled air is then transported to a cooling tank to further cool the liquid ammonia. When the cooled liquid ammonia flows into a connecting pipe, an exhaust valve releases the air, and the gas flow rate on each pipe is detected. The ammonia then flows into a transport pipe for further cooling and flow rate detection. By comparing the values ​​from the two flow meters, the amount of ammonia produced is determined, and the exhaust valve is used to determine whether cooling fins in the cooling pipe are needed for further cooling. Summary of the Invention

[0005] 1. The technical problem that the invention aims to solve

[0006] The purpose of this invention is to address the shortcomings of existing detection technologies, which cannot perform dual cooling and dual detection, and cannot reduce the error of the detection volume by comparing the values ​​on both sides.

[0007] 2. Technical Solution

[0008] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0009] The present invention provides a liquid ammonia mass flow rate detection device and method, comprising a stirring and feeding device, a cooling and conveying device, a leak detection device, a flow rate detection device, and a recooling device. The flow rate detection device includes a conveying pipe, a flow meter, and a display screen. The bottom end of the flow meter is connected to the conveying pipe, and the top end is connected to the display screen.

[0010] Preferably, the mixing and feeding device includes a motor, a mixing blade, a storage tank, a first valve, a transmission pipe, and a discharge port. A first stud and a first nut are provided at the center of the upper end of the storage tank. The first stud and the first nut are spirally connected. The upper end of the first stud is open. The motor is connected to the upper end of the storage tank. The mixing blade passes through the upper end of the storage tank and is connected to the motor, extending into the interior of the storage tank. The discharge port is located directly below the bottom of the storage tank. The transmission pipe is connected to the discharge port. The first valve is located on the transmission pipe.

[0011] Preferably, the discharge port of the mixing and feeding device has the same diameter as the transmission pipe, and the number of motors and mixing blades is 2, which are distributed on the left and right sides inside the storage tank, and the two mixing blades are staggered.

[0012] Preferably, the cooling conveying device includes a cooling conveying pipe, an air pump, an air intake pipe, a cooling tank, a No. 2 stud, a No. 2 nut, an air storage tank, and a No. 2 valve. The air storage tank is connected to the air pump. The upper end of the No. 2 stud is provided with a coolant filling port. The No. 2 stud and the No. 2 nut are screwed together. One end of the cooling conveying pipe is connected to the upper end of the cooling tank, and the other end is connected to the upper end of the air pump. The air intake pipe is connected to the air pump, and the air intake pipe is provided with a No. 2 valve. The No. 2 stud is oriented from top to bottom.

[0013] Preferably, the leak detection device includes a connecting pipe and an exhaust valve, the exhaust valve being connected to the connecting pipe, and one end of the connecting pipe being connected to the cooling tank of the cooling conveying device.

[0014] Preferably, the feed pipe of the flow detection device is connected to the connecting pipe of the air leakage detection device. There are 6 connecting pipes arranged in a 60-degree circular array. Only the connecting pipe at the top is equipped with an exhaust valve, which is always facing upwards and cannot be rotated.

[0015] Preferably, the recooling device includes a cooling plate, a cooling pipe and a conveying pipe, one end of the connecting pipe of the leak detection device is connected to the conveying pipe, the cooling pipe is provided with a cooling plate and the cooling pipe is embedded in the conveying pipe.

[0016] Preferably, the diameter of the cooling pipe in the recooling device is smaller than the diameter of the transport pipe, and the number of cooling fins is 10, arranged in a 60-degree annular array on the inner wall of the cooling pipe.

[0017] Preferably, the flow meters and display screens of the flow detection device are distributed on the outer walls of the conveying pipe and the transport pipe, and the number is 6. The flow meters and display screens on the conveying pipe correspond one-to-one with the number of connecting pipes.

[0018] Preferably, the steps are as follows:

[0019] S100: By unscrewing the nut at the top of the storage tank, liquid ammonia is added. After stirring, it flows into the transmission pipe from the outlet at the bottom of the storage tank. The flow of liquid ammonia is controlled by opening and closing valve number one.

[0020] S200: Through the action of the coolant, outside air enters the storage tank through the intake pipe and intake pump, where it is cooled and delivered to the cooling tank to cool the liquid ammonia.

[0021] S300: When the cooled liquid ammonia flows into the connecting pipe, an exhaust valve will release the air, and the gas flow rate on each pipe will be detected.

[0022] S400 then flows into the delivery pipe, where the liquid ammonia is further cooled and its flow rate is monitored. By comparing the values ​​of the two flow meters, it is determined whether a large amount of ammonia has been produced, and the exhaust valve is used to determine whether the cooling fins in the cooling pipe need to be cooled.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0025] (1) A liquid ammonia mass flow detection device and method of the present invention, by unscrewing the No. 2 nut to add coolant, the coolant flows into the gas storage tank along the No. 2 stud. When the suction pump is working, the outside air enters the gas storage tank through the suction pipe and will be cooled. The cold air is delivered to the cooling tank to perform the first cooling of the liquid ammonia. When the liquid ammonia flows into the cooling pipe, the liquid ammonia is cooled by the cooling plate, which can perform the second cooling. This design can perform dual cooling.

[0026] (2) A liquid ammonia mass flow detection device and method of the present invention: when liquid ammonia passes through the conveying pipe, the flow meter starts to work to detect the flow rate and the value will be displayed on the display screen to perform the first detection of the gas. When the ammonia passes through the conveying pipe, it will be detected a second time by the flow meter on its outer wall and the display screen. This design can perform dual detection. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a liquid ammonia mass flow detection device and method according to the present invention;

[0028] Figure 2This is a schematic diagram of the stirring and feeding device structure of a liquid ammonia mass flow detection device and method according to the present invention.

[0029] Figure 3 This is a schematic diagram of the cooling and conveying device structure of a liquid ammonia mass flow detection device and method according to the present invention;

[0030] Figure 4 This is a schematic diagram of the leakage detection device of a liquid ammonia mass flow rate detection device and method according to the present invention.

[0031] Figure 5 This is a schematic diagram of the flow detection device structure of a liquid ammonia mass flow detection device and method according to the present invention.

[0032] Figure 6 This is a schematic diagram of the recooling device structure of a liquid ammonia mass flow rate detection device and method according to the present invention.

[0033] Explanation of the labels in the diagram:

[0034] 100. Mixing and feeding device; 110. Motor; 120. Mixing blade; 130. Storage tank; 140. No. 1 valve; 150. Transmission pipe; 160. Discharge port; 170. No. 1 stud; 180. No. 1 nut;

[0035] 200. Propulsion device; 210. Cooling conveying pipe; 220. Suction pump; 230. Suction pipe; 240. Cooling tank; 250. Stud No. 2; 260. Nut No. 2; 270. Air storage tank; 280. Valve No. 2;

[0036] 300. Leak detection device; 310. Connecting pipe; 320. Exhaust valve;

[0037] 400. Recycling and circulation device; 410. Conveying pipe; 420. Flow meter; 430. Display screen;

[0038] 500. Recooling device; 510. Cooling plate; 520. Cooling pipe; 530. Transport pipe. Detailed Implementation

[0039] To facilitate understanding of the present invention, a more complete description of the invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough and complete.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element; the terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] Example 1

[0043] See attached document Figures 1-6 As shown in the figure, this embodiment of a liquid ammonia mass flow rate detection device and method is characterized by: including a stirring and feeding device 100, a cooling and conveying device 200, a leak detection device 300, a flow rate detection device 400, and a recooling device 500. The flow rate detection device 400 includes a feeding pipe 410, a flow meter 420, and a display screen 430. The bottom end of the flow meter 420 is connected to the feeding pipe 410, and the top end is connected to the display screen 430. When liquid ammonia passes through the feeding pipe 410, the flow meter 420 starts to work to detect the flow rate, and the value will be displayed on the display screen 430. This design can detect gas flow rate.

[0044] The mixing and feeding device 100 in this embodiment includes a motor 110, a mixing blade 120, a storage tank 130, a first valve 140, a transmission pipe 150, and a discharge port 160. A first stud 170 and a first nut 180 are provided at the center of the upper end of the storage tank 130. The first stud 170 and the first nut 180 are spirally connected, and the upper end of the first stud 170 is open. The motor 110 is connected to the upper end of the storage tank 130, and the mixing blade 120 passes through the upper end of the storage tank 130 and is connected to the motor 110. Extending into the storage tank 130, the outlet 160 is located directly below the bottom of the storage tank 130. The transmission pipe 150 is connected to the outlet 160, and the first valve 140 is located on the transmission pipe 150. By unscrewing the first nut 180, liquid ammonia is added. After being stirred by the stirring plate 120, it flows from the outlet 160 at the bottom of the storage tank 130 into the transmission pipe 150. The transmission of liquid ammonia is controlled by opening and closing the first valve 140. This design can transport liquid ammonia and control the transport rate.

[0045] In this embodiment, the discharge port 160 of the mixing and feeding device 100 has the same diameter as the transmission pipe 150. There are two motors 110 and two stirring blades 120, which are distributed on the left and right sides inside the storage tank 130. The two stirring blades 120 are staggered. The liquid ammonia comes out of the discharge port 160 due to gravity. Since the discharge port 160 has the same diameter as the transmission pipe 150, this design can ensure that the liquid ammonia will not be leaked and that the mixing is more thorough.

[0046] The cooling conveying device 200 in this embodiment includes a cooling conveying pipe 210, a suction pump 220, a suction pipe 230, a cooling tank 240, a second stud 250, a second nut 260, an air storage tank 270, and a second valve 280. The air storage tank 270 is connected to the suction pump 220. The upper end of the second stud 250 is provided with a coolant filling port. The second stud 250 and the second nut 260 are spirally connected. One end of the cooling conveying pipe 210 is connected to the upper end of the cooling tank 240, and the other end is connected to the suction pipe 230. The upper end of the air pump 220 is connected to the suction pipe 230, which is connected to the air pump 220. The suction pipe 230 is equipped with a second valve 280, and the second stud 250 is oriented from top to bottom. Coolant is added by unscrewing the second nut 260. The coolant flows into the air storage tank 270 along the second stud 250. When the air pump is working, outside air enters the air storage tank 270 through the suction pipe 230 and is cooled. The cold air is then delivered to the cooling tank 240 for the first cooling of the liquid ammonia.

[0047] The leak detection device 300 in this embodiment includes a connecting pipe 310 and an exhaust valve 320. The exhaust valve 320 is connected to the connecting pipe 310. One end of the connecting pipe 310 is connected to the cooling tank 240 of the cooling conveying device 200. When liquid ammonia flows in, the exhaust valve 320 detects whether air needs to be discharged. This design can ensure smooth flow of liquid ammonia and discharge of air.

[0048] In this embodiment, the feed pipe 410 of the flow detection device 400 is connected to the connecting pipe 310 of the leak detection device 300. There are 6 connecting pipes 310 arranged in a 60-degree circular array. Only the connecting pipe 310 at the top is equipped with an exhaust valve 320, which is always facing upwards and cannot be rotated. When liquid ammonia flows in, the exhaust valve 320 detects whether air needs to be discharged. This design can ensure smooth flow of liquid ammonia and better venting.

[0049] The recooling device 500 in this embodiment includes a cooling plate 510, a cooling pipe 520, and a transport pipe 530. One end of the connecting pipe 310 of the leak detection device 300 is connected to the transport pipe 530. The cooling plate 510 is installed inside the cooling pipe 520 and is embedded in the transport pipe 530. When liquid ammonia flows in, it is cooled by the cooling plate 510. This design can ensure smooth flow of liquid ammonia and allow for a second cooling.

[0050] In this embodiment, the diameter of the cooling pipe 520 of the recooling device 500 is smaller than that of the transport pipe 530. The number of cooling fins 510 is 6, arranged in a 60-degree ring array on the inner wall of the cooling pipe 520. When liquid ammonia enters, it is cooled. This design makes the cooling effect better.

[0051] In this embodiment, the flow detection device 400 has six flow meters 420 and a display screen 430 distributed on the outer walls of the conveying pipe 410 and the transport pipe 530. The flow meters 420 and the display screen 430 on the conveying pipe 410 correspond one-to-one with the number of the connecting pipe 310. When ammonia passes through the transport pipe 530, it will be detected a second time by the flow meters 420 and the display screen 430 on its outer wall. This design can ensure that ammonia will be detected a second time.

[0052] The steps of this embodiment are as follows:

[0053] S100: By unscrewing the No. 1 nut 180 at the top of the storage tank 130, liquid ammonia is added. After stirring, it flows from the discharge port 160 at the bottom of the storage tank 130 into the transmission pipe 150. The transmission of liquid ammonia is controlled by opening and closing the No. 1 valve 140.

[0054] S200. Through the action of the coolant, when the suction pump 220 is working, the outside air enters the storage tank 270 through the suction pipe 230 and is cooled. The cold air is then transported to the cooling tank 240 to cool the liquid ammonia.

[0055] S300 When the cooled liquid ammonia flows into the connecting pipe 310, the exhaust valve 320 will discharge the air and detect the gas flow rate on each connecting pipe 310.

[0056] S400 then flows into the transport pipe 530, where the liquid ammonia is further cooled and its flow rate is monitored. By comparing the values ​​of the two flow meters, it is determined whether a large amount of ammonia has been generated, and combined with the exhaust valve 320, it is determined whether the cooling fins 510 in the cooling pipe 520 are needed for cooling.

[0057] The above-described embodiments are merely illustrative of certain implementations of the present invention, and are described in a relatively specific and detailed manner. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A liquid ammonia mass flow detection device, characterized by: It includes a mixing and feeding device (100), a cooling and conveying device (200), a leak detection device (300), a flow detection device (400), and a recooling device (500). The flow detection device (400) includes a conveying pipe (410), a flow meter (420), and a display screen (430). The bottom end of the flow meter (420) is connected to the conveying pipe (410), and the top end is connected to the display screen (430). The mixing and feeding device (100) includes a motor (110), a stirring blade (120), a storage tank (130), a first valve (140), a transmission pipe (150), and a discharge port (160). The storage tank (130) has a first stud (170) and a first nut (180) at the center of its upper end. The first stud (170) and the first nut (180) are spirally connected. The upper end of the first stud (170) is open. The motor (110) is connected to the upper end of the storage tank (130). The stirring blade (120) passes through the upper end of the storage tank (130) and is connected to the motor (110), extending into the interior of the storage tank (130). The discharge port (160) is located directly below the bottom of the storage tank (130). The transmission pipe (150) is connected to the discharge port (160). The first valve (140) is located on the transmission pipe (150). The cooling conveying device (200) includes a cooling conveying pipe (210), an air pump (220), an air suction pipe (230), a cooling tank (240), a second stud (250), a second nut (260), an air storage tank (270), and a second valve (280). The air storage tank (270) is connected to the air pump (220). The upper end of the second stud (250) is provided with a coolant filling port. The second stud (250) and the second nut (260) are spirally connected. One end of the cooling conveying pipe (210) is connected to the upper end of the cooling tank (240), and the other end is connected to the upper end of the air pump (220). The air suction pipe (230) is connected to the air pump (220), and the second valve (280) is provided on the air suction pipe (230). The direction of the second stud (250) is from top to bottom. The leak detection device (300) includes a connecting pipe (310) and an exhaust valve (320). The exhaust valve (320) is connected to the connecting pipe (310), and one end of the connecting pipe (310) is connected to the cooling tank (240) of the cooling conveying device (200). The feed pipe (410) of the flow detection device (400) is connected to the connecting pipe (310) of the air leakage detection device (300). There are 6 connecting pipes (310) arranged in a 60-degree circular array. Only the connecting pipe (310) at the top is equipped with an exhaust valve (320), and its direction is always upward and cannot be rotated. The recooling device (500) includes a cooling plate (510), a cooling pipe (520) and a transport pipe (530). One end of the connecting pipe (310) of the leak detection device (300) is connected to the transport pipe (530). The cooling pipe (520) is provided with a cooling plate (510) and is embedded in the transport pipe (530). The flow detection device (400) has a flow meter (420) and a display screen (430) distributed on the outer wall of the conveying pipe (410) and the transport pipe (530), and the number is 10. The flow meters (420) and the display screen (430) on the conveying pipe (410) correspond one-to-one with the number of the connecting pipe (310).

2. The liquid ammonia mass flow detection device according to claim 1, characterized in that: The discharge port (160) of the mixing and feeding device (100) has the same diameter as the transmission pipe (150). There are two motors (110) and two stirring blades (120), which are distributed on the left and right sides inside the storage tank (130), and the two stirring blades (120) are staggered.

3. The liquid ammonia mass flow detection device of claim 1, wherein: The diameter of the cooling pipe (520) of the recooling device (500) is smaller than that of the transport pipe (530), and the number of cooling plates (510) is 6, arranged in a 60-degree annular array on the inner wall of the cooling pipe (520).

4. A method for detecting the mass flow rate of liquid ammonia, applied to the liquid ammonia mass flow rate detection device according to claim 1, characterized in that: The steps are as follows: S100. By unscrewing the No. 1 nut (180) at the top of the storage tank (130), liquid ammonia is added. After stirring, it flows from the discharge port (160) at the bottom of the storage tank (130) into the transmission pipe (150). The liquid ammonia is transferred or not transferred by controlling the opening and closing of the No. 1 valve (140). S200. Through the action of the coolant, when the suction pump (220) is working, the outside air enters the storage tank (270) through the suction pipe (230) and is cooled. The cold air is then transported to the cooling tank (240) to cool the liquid ammonia. S300 When the cooled liquid ammonia flows into the connecting pipe (310), an exhaust valve (320) will be used to discharge air, and the gas flow rate on each connecting pipe (310) will be detected. S400 then flows into the transport pipe (530), where the liquid ammonia is further cooled and its flow rate is detected. By comparing the values ​​of the two flow meters, it is determined whether a lot of ammonia is produced, and combined with the exhaust valve (320), it is determined whether the cooling fins (510) in the cooling pipe (520) are needed for cooling.

Images