An ammonia unloading device for liquid ammonia tanks

Abstract

The present invention relates to the technical field of ammonia water transportation, and specifically to an ammonia unloading device for a liquid ammonia tank, comprising a liquid ammonia tank body, an input port fixedly installed on the liquid ammonia tank body, and a first flange fixedly installed on the end of an output pipe of the liquid ammonia tank body, a connecting pipe fixedly installed on one side of the first flange, and a buffer mechanism for reducing the internal pressure of the connecting pipe is provided inside the connecting pipe. The present invention provides a buffer mechanism inside the ammonia unloading device, and after ammonia is input into the liquid ammonia tank body through the input port, ammonia is unloaded from the output pipe end on one side of the liquid ammonia tank body after a series of operations to form liquid ammonia, and a connecting pipe is provided on one side of the first flange, eliminating the previous direct connection of two flanges by screws and nuts, reducing ammonia leakage caused by loose screws between flanges, and reducing the pressure of liquid ammonia on the first flange, the second flange, the connecting pipe and other components under the buffering effect of the buffer mechanism, thereby protecting the ammonia unloading device.

Description

Technical Field

[0001] The invention relates to the technical field of ammonia water transportation, in particular to an ammonia unloading device for a liquid ammonia tank. Background Art

[0002] Liquid ammonia, also known as anhydrous ammonia, is a colorless liquid with a strong pungent odor. As an important chemical raw material, ammonia is usually pressurized or cooled to obtain liquid ammonia and stored in tanks for the convenience of transportation and storage. Liquid ammonia is easily soluble in water, and after dissolving in water, it forms ammonium ions NH4+ and hydroxide ions OH-, and the solution is alkaline.

[0003] The liquid ammonia tank is composed of a tank shell, an inner layer, an ammonia charging device, an ammonia unloading device and other mechanisms. The ammonia unloading device is composed of an ammonia unloading pipeline, an ammonia unloading pump and other components. The pipeline parts connected to the ammonia charging device and the ammonia unloading device are installed with flanges to facilitate the loading and unloading of liquid ammonia. The existing flange connection between the ammonia unloading device and the liquid ammonia tank is mostly fixed with screws and nuts.

[0004] When unloading ammonia, liquid ammonia is discharged to the outside through the pipe at the outlet. The long-term liquid output in the pipe will cause the pressure to cause damage to the pipe, resulting in liquid leakage and pollution. The pipes are connected by flanges. The existing flanges and pipes are simply fixed with bolts and nuts. Under long-term working conditions, the sealing reliability of the pipe between the two flanges is gradually reduced due to the loosening of the bolts, resulting in misalignment of the flange connection.

[0005] To this end, an ammonia unloading device for a liquid ammonia tank is proposed. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an ammonia unloading device for a liquid ammonia tank. The technical problem to be solved by the present invention is that the gas pressure in the liquid ammonia tank and the flow pressure of the liquid ammonia during ammonia unloading cause damage to the ammonia unloading device, resulting in loosening of the connection between the ammonia unloading device and the liquid ammonia tank.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: an ammonia unloading device for a liquid ammonia tank, comprising a liquid ammonia tank body, a first flange fixedly installed at an input port of the liquid ammonia tank body, and a first flange fixedly installed at an end of an output pipe of the liquid ammonia tank body, a connecting pipe fixedly installed on one side of the first flange, a buffer mechanism for relieving the internal pressure of the connecting pipe is provided inside the connecting pipe, a second flange is provided at the other end of the connecting pipe, a connecting head is fixedly installed on one side of the second flange, the connecting pipe and the connecting head are fixed by a clamping mechanism, the buffer mechanism comprises a first groove opened on the inner wall of the connecting pipe, two symmetrically arranged rubber plates are provided inside the connecting pipe, a connecting block is fixedly installed on one side of the two rubber plates, two symmetrically arranged connecting rods are hinged on the connecting block, one end of the two connecting rods are hinged with a slider, a first fixing rod is fixedly installed on the side wall of the first groove, two first springs are sleeved on the first fixing rod, two symmetrically arranged sliders are slidably installed on the first fixing rod, one end of the two first springs are respectively fixedly installed on the side wall of the slider, and the other end of the first spring is fixedly connected to the side wall of the first groove.

[0008] In a preferred embodiment, two symmetrically arranged clamping plates are fixedly mounted on the bottom wall of one of the rubber plates, and two symmetrically arranged clamping grooves are provided on the top wall of the other rubber plate.

[0009] In a preferred embodiment, the locking mechanism includes a plurality of second grooves formed inside the connector, a second spring is fixedly connected to the side walls of the plurality of second grooves, an insertion rod is fixedly connected to one end of the second spring, and a plurality of slots are formed on the inner wall of the connecting tube.

[0010] In a preferred embodiment, four symmetrically arranged second fixing rods are fixedly installed on one side of the first flange, and the four second fixing rods are evenly distributed on both sides of the connecting pipe. A third spring is sleeved on the second fixing rod, and the second fixing rod passes through the side wall of the second flange and is slidably connected to the second flange. The second fixing rod is fixedly connected to the third fixing rod, and a nut is fixedly installed on the middle part of the third fixing rod, and a threaded rod is threadedly connected to the nut.

[0011] In a preferred embodiment, two symmetrically arranged buffer plates are fixedly mounted on the inner walls of the two rubber plates, two symmetrically arranged fourth springs are fixedly mounted inside the two buffer plates, and a plurality of through holes are equidistantly provided inside the buffer plates.

[0012] In a preferred embodiment, the inner diameter of the connecting pipe is equal to the outer diameter of the connecting head, and the connecting head is just connected to the connecting pipe.

[0013] In a preferred embodiment, the buffer plate is made of butyl rubber.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention arranges a buffer mechanism inside the ammonia unloading device. After ammonia is input into the liquid ammonia tank body through the input port and a series of operations are performed to form liquid ammonia, the ammonia is unloaded from the output pipe end on one side of the liquid ammonia tank body. A connecting pipe is arranged on one side of the first flange, and the previous direct connection of the two flanges by screws and nuts is cancelled, thereby reducing the leakage of ammonia due to loose screws between the flanges. When the liquid ammonia is output, the pressure in the tank increases. When the liquid ammonia flows into the connecting pipe, the liquid ammonia pushes the two rubber plates to move in the direction close to the inner wall of the connecting pipe respectively. The two rubber plates drive the connecting block to move, thereby driving the connecting rod to deflect. The connecting rod drives the slider to slide on the first fixed rod in the direction close to the inner wall of the first groove, thereby squeezing the first spring to form a contraction. Under the buffering action of the buffer mechanism, the pressure of the liquid ammonia on the first flange, the second flange, the connecting pipe and other components is reduced, thereby realizing the protection of the ammonia unloading device.

[0016] 2. The present invention provides a second groove, a second spring and other mechanisms, and utilizes the method of inserting the connecting head into the interior of the connecting tube. The inner wall of the connecting tube squeezes the insertion rod, and the insertion rod overcomes the elastic force of the second spring and contracts into the interior of the second groove. When the second groove moves to the bottom of the slot, the insertion rod is bounced up under the elastic force of the second spring, so that the insertion rod is inserted into the slot, thereby fixing the connecting head and the connecting tube and achieving sealing of the connecting head and the connecting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a three-dimensional diagram of the connecting pipe of the present invention;

[0019] Figure 3 It is a side sectional view of the first flange of the present invention;

[0020] Figure 4 It is a side sectional view of the second flange of the present invention;

[0021] Figure 5 It is a front cross-sectional view of the connecting pipe of the present invention;

[0022] Figure 6 It is a side sectional view of the second flange of the present invention;

[0023] Figure 7 It is an enlarged view of the buffer mechanism of the present invention;

[0024] Figure 8 For the present invention Figure 3 A magnified view of the structure at center;

[0025] Fig. 9 It is an enlarged view of the engaging mechanism of the present invention.

[0026] In the figure: 1. liquid ammonia tank body; 2. input port; 3. first flange; 4. connecting pipe; 5. second flange; 6. connector; 7. buffer mechanism; 701. first groove; 702. rubber plate; 703. connecting block; 704. connecting rod; 705. slider; 706. first fixing rod; 707. first spring; 708. clamping plate; 709. clamping groove; 8. clamping mechanism; 801. second groove; 802. second spring; 803. plug rod; 804. slot; 901. second fixing rod; 902. third spring; 903. third fixing rod; 904. nut; 905. threaded rod; 1001. buffer plate; 1002. fourth spring; 1003. through hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Reference Figure 1 , 2 , 3, 4, 7, the present invention provides an ammonia unloading device for a liquid ammonia tank, comprising a liquid ammonia tank body 1, an input port 2 fixedly installed on the liquid ammonia tank body 1, and a first flange 3 fixedly installed on the end of the output pipe of the liquid ammonia tank body 1, a connecting pipe 4 is fixedly installed on one side of the first flange 3, and a buffer mechanism 7 for relieving the internal pressure of the connecting pipe 4 is provided inside the connecting pipe 4, a second flange 5 is provided at the other end of the connecting pipe 4, a connecting head 6 is fixedly installed on one side of the second flange 5, the connecting pipe 4 and the connecting head 6 are fixed by a clamping mechanism 8, the buffer mechanism 7 comprises a first groove 701 opened on the inner wall of the connecting pipe 4, and two pairs of A rubber plate 702 is provided, and a connecting block 703 is fixedly installed on one side of the two rubber plates 702. Two symmetrically arranged connecting rods 704 are hinged on the connecting block 703, and one end of the two connecting rods 704 is hinged with a slider 705. A first fixing rod 706 is fixedly installed on the side wall of the first groove 701, and two first springs 707 are sleeved on the first fixing rod 706. Two symmetrically arranged sliders 705 are slidably installed on the first fixing rod 706, and one end of the two first springs 707 is respectively fixedly installed on the side wall of the slider 705, and the other end of the first spring 707 is fixedly connected to the side wall of the first groove 701.

[0029] Compared with the prior art, the present invention provides a buffer mechanism 7 inside the ammonia unloading device. After ammonia is input into the liquid ammonia tank body 1 through the input port 2, liquid ammonia is formed through a series of operations and then unloaded from the output pipe end on one side of the liquid ammonia tank body 1. A connecting pipe 4 is provided on one side of the first flange 3, and the previous direct connection of the two flanges by screws and nuts is cancelled, thereby reducing the leakage of ammonia due to loose screws between the flanges. When the liquid ammonia is output, the pressure in the tank increases. When the liquid ammonia flows into the connecting pipe 4, the liquid ammonia pushes the two rubber plates 702 to move in the direction close to the inner wall of the connecting pipe 4 respectively. The two rubber plates 702 drive the connecting block 703 to move, thereby driving the connecting rod 704 to deflect. The connecting rod 704 drives the slider 705 to slide on the first fixing rod 706 in the direction close to the inner wall of the first groove 701, thereby squeezing the first spring 707 to form a contraction. Under the buffering action of the buffer mechanism 7, the pressure of the liquid ammonia on the first flange 3, the second flange 5, the connecting pipe 4 and other components is reduced, thereby achieving protection of the ammonia unloading device.

[0030] Reference Figure 3 , 8 Two symmetrically arranged card plates 708 are fixedly mounted on the bottom wall of one of the rubber plates 702 , and two symmetrically arranged card slots 709 are opened on the top wall of the other rubber plate 702 .

[0031] In the embodiment of the present application, the two rubber plates 702 can be tightly fitted together when they are not moving due to the engagement of the card plate 708 and the card slot 709. When liquid ammonia flows into the connecting pipe 4, the two rubber plates 702 move in opposite directions respectively. The upper rubber plate 702 drives the card plate 708 to slide in the card slot 709, but the card plate 708 does not slide out of the card slot 709, so that the rubber plate 702 continues to buffer the connecting pipe 4, thereby achieving continued protection of the ammonia unloading device.

[0032] Reference Figure 3 , 4 9. The locking mechanism 8 includes a plurality of second grooves 801 provided inside the connector 6, and a second spring 802 is fixedly connected to the side walls of the plurality of second grooves 801. An insertion rod 803 is fixedly connected to one end of the second spring 802. A plurality of slots 804 are provided on the inner wall of the connecting tube 4.

[0033] In the embodiment of the present application, by providing a second groove 801, a second spring 802 and other mechanisms, the connecting head 6 is inserted into the interior of the connecting tube 4, and the inner wall of the connecting tube 4 squeezes the insertion rod 803. The insertion rod 803 overcomes the elastic force of the second spring 802 and contracts to the interior of the second groove 801. When the second groove 801 moves to the bottom of the slot 804, the insertion rod 803 is bounced up under the elastic force of the second spring 802, so that the insertion rod 803 is inserted into the interior of the slot 804, thereby fixing the connecting head 6 and the connecting tube 4 and achieving sealing of the connecting head 6 and the connecting tube 4.

[0034] Reference Figure 2 , 3 4. Four symmetrically arranged second fixing rods 901 are fixedly installed on one side of the first flange 3. The four second fixing rods 901 are evenly distributed on both sides of the connecting pipe 4. A third spring 902 is sleeved on the second fixing rod 901. The second fixing rod 901 passes through the side wall of the second flange 5 and is slidably connected to the second flange 5. The second fixing rod 901 is fixedly connected to the third fixing rod 903. A nut 904 is fixedly installed on the middle part of the third fixing rod 903. A threaded rod 905 is threadedly connected to the nut 904.

[0035] In the embodiment of the present application, the first flange 3 and the second flange 5 are connected by the second fixing rod 901, so that the positions of the first flange 3 and the second flange 5 are maintained at the same horizontal position, thereby achieving the fixing and limiting of the first flange 3 and the second flange 5; by utilizing the threaded connection between the threaded rod 905 and the nut 904, the staff rotates the threaded rod 905, the threaded rod 905 slides in the nut 904, and drives the second flange 5 to move toward the direction close to the first flange 3, and the third spring 902 contracts due to the pressure, and after the threaded rod 905 is no longer rotated, the second flange 5 is fixed under the joint action of the elastic force of the third spring 902 and the threaded rod 905, thereby achieving the adjustment of the tightness between the first flange 3 and the second flange 5.

[0036] Reference Figure 5 Two symmetrically arranged buffer plates 1001 are fixedly installed on the inner walls of the two rubber plates 702, and two symmetrically arranged fourth springs 1002 are fixedly installed inside the two buffer plates 1001. A plurality of through holes 1003 are opened at equal distances inside the buffer plates 1001.

[0037] In the embodiment of the present application, the fourth spring 1002 inside the buffer plate 1001 is used to reduce the pressure generated by the liquid inside the pipeline; the through hole 1003 on the buffer plate 1001 is used to reduce the speed of the liquid to prevent the liquid from flowing too fast and damaging the ammonia unloading device.

[0038] Reference Figure 3 , 4The inner diameter of the connecting pipe 4 is equal to the outer diameter of the connecting head 6 , and the connecting head 6 is just connected to the connecting pipe 4 .

[0039] In the embodiment of the present application, the inner diameter of the connecting pipe 4 and the outer diameter of the connecting head 6 are set to the same diameter, so that the liquid ammonia flowing through the connecting pipe 4 can flow unimpeded along the inner wall of the connecting head 6 after passing through the buffer mechanism 7, without causing severe impact on the interior of the second flange 5.

[0040] Reference Figure 5 The material of the buffer plate 1001 is butyl rubber.

[0041] In the embodiment of the present application, butyl rubber has good chemical stability and thermal stability. It is resistant to heat, ozone, aging, and chemicals, and has shock absorption and electrical insulation properties. It can be exposed to animal or vegetable oils or oxidizable chemicals, thereby extending the service life of the buffer plate 1001 and reducing the replacement of the buffer plate 1001 during use.

[0042] Working principle:

[0043] The connector 6 is inserted into the interior of the connecting tube 4, and the inner wall of the connecting tube 4 squeezes the plug rod 803. The plug rod 803 overcomes the elastic force of the second spring 802 and contracts into the interior of the second groove 801. When the second groove 801 moves to the right below the slot 804, the plug rod 803 is bounced up under the elastic force of the second spring 802, so that the plug rod 803 is inserted into the slot 804 to fix the connector 6 and the connecting tube 4. The staff rotates the threaded rod 905, and the threaded rod 905 slides in the nut 904, and drives the second flange 5 to approach the second groove 801. The first flange 3 moves in the direction of the third spring 902, and the third spring 902 is compressed by the pressure. After the threaded rod 905 is no longer rotated, the second flange 5 is fixed under the joint action of the elastic force of the third spring 902 and the threaded rod 905. Ammonia is input into the liquid ammonia tank body 1 through the input port 2. After a series of operations to form liquid ammonia, ammonia is unloaded from the output pipe end on one side of the liquid ammonia tank body 1. A connecting pipe 4 is arranged on one side of the first flange 3, and the previous direct connection of the two flanges by screws and nuts is cancelled, thereby reducing the leakage of ammonia caused by loose screws between the flanges. The pressure in the tank increases when the liquid ammonia is discharged. When the liquid ammonia flows into the connecting pipe 4, the liquid ammonia pushes the two rubber plates 702 to move toward the inner wall of the connecting pipe 4 respectively. The two rubber plates 702 drive the connecting block 703 to move, thereby driving the connecting rod 704 to deflect. The connecting rod 704 drives the slider 705 to slide on the first fixing rod 706 toward the inner wall of the first groove 701, thereby squeezing the first spring 707 to form a contraction. Under the buffering effect of the buffer mechanism 7, the impact of the liquid ammonia on the first flange 3, the second flange 5, and the connecting pipe 4 is reduced. The pressure of the equal components, under the engagement of the card plate 708 and the card slot 709, the two rubber plates 702 can be tightly fitted together when not moving. When the liquid ammonia flows into the connecting pipe 4, the two rubber plates 702 move in opposite directions respectively. The upper rubber plate 702 drives the card plate 708 to slide in the card slot 709, but the card plate 708 does not slide out of the card slot 709, so that the rubber plate 702 continues to buffer the connecting pipe 4, and the fourth spring 1002 and the through hole 1003 inside the buffer plate 1001 are used to slow down the speed of the liquid.

[0044] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0045] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0046] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ammonia unloading device for a liquid ammonia tank, comprising a liquid ammonia tank body (1), an input port (2) fixedly mounted on the liquid ammonia tank body (1), and a first flange (3) fixedly mounted on the end of an output pipe of the liquid ammonia tank body (1), characterized in that: A connecting pipe (4) is fixedly mounted on one side of the first flange (3); a buffer mechanism (7) for relieving the internal pressure of the connecting pipe (4) is provided inside the connecting pipe (4); a second flange (5) is provided at the other end of the connecting pipe (4); a connecting head (6) is fixedly mounted on one side of the second flange (5); the connecting pipe (4) and the connecting head (6) are fixedly mounted via a snap-fit ​​mechanism (8); the buffer mechanism (7) comprises a first groove (701) formed on the inner wall of the connecting pipe (4); two symmetrically arranged rubber plates (702) are provided inside the connecting pipe (4); a connecting block (701) is fixedly mounted on one side of the two rubber plates (702); 03), two symmetrically arranged connecting rods (704) are hinged on the connecting block (703), one end of each of the two connecting rods (704) is hinged with a slider (705), a first fixing rod (706) is fixedly installed on the side wall of the first groove (701), two first springs (707) are sleeved on the first fixing rod (706), two symmetrically arranged sliders (705) are slidably installed on the first fixing rod (706), one end of the two first springs (707) are respectively fixedly installed on the side wall of the slider (705), and the other end of the first spring (707) is fixedly connected to the side wall of the first groove (701); Two symmetrically arranged clamping plates (708) are fixedly mounted on the bottom wall of one of the rubber plates (702), and two symmetrically arranged clamping grooves (709) are opened on the top wall of the other rubber plate (702); The locking mechanism (8) comprises a plurality of second grooves (801) formed inside the connector (6); a second spring (802) is fixedly connected to the side walls of the plurality of second grooves (801); an insertion rod (803) is fixedly connected to one end of the second spring (802); and a plurality of slots (804) are formed on the inner wall of the connecting tube (4); Four symmetrically arranged second fixing rods (901) are fixedly mounted on one side of the first flange (3), the four second fixing rods (901) are evenly distributed on both sides of the connecting pipe (4), a third spring (902) is sleeved on the second fixing rod (901), the second fixing rod (901) passes through the side wall of the second flange (5) and is slidably connected to the second flange (5), the second fixing rod (901) is fixedly connected to the third fixing rod (903), a nut (904) is fixedly mounted on the middle part of the third fixing rod (903), and a threaded rod (905) is threadedly connected to the nut (904); Two symmetrically arranged buffer plates (1001) are fixedly mounted on the inner walls of the two rubber plates (702), two symmetrically arranged fourth springs (1002) are fixedly mounted inside the two buffer plates (1001), and a plurality of through holes (1003) are provided at equal distances inside the buffer plates (1001); The inner diameter of the connecting pipe (4) is equal to the outer diameter of the connecting head (6), and the connecting head (6) is just connected to the connecting pipe (4); The material of the buffer plate (1001) is butyl rubber.

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