A device for filling a storage tank with cryogenic liquid

Abstract

The present invention provides a device for filling a storage tank with low-temperature liquid, comprising a transfer tank body, a sealing lip plate, a plurality of guide rods, a lightweight sleeve, a sealing float, a hard liquid pipe, a liquid guide port, a first sealing float plate, an exhaust hole, a connecting rod, a liquid guide hole, a second sealing float plate for sealing the liquid guide hole movably arranged below the liquid guide hole, the lower end of the connecting rod is connected to the second sealing float plate, and when the first sealing float plate seals the inlet and outlet, the second sealing float plate seals the liquid guide hole. The device for filling a storage tank with low-temperature liquid of the present invention can achieve quantitative automatic filling, be more humane, and improve production efficiency. It can also solve the problems of blocked vision, liquid splashing, and difficulty in controlling dosage caused by contact between liquid and air during the filling process, making the working conditions more humane, improving efficiency, and reducing human resource consumption.

Description

Technical Field

[0001] The invention relates to the technical field of cryogenic liquid transfer storage, and in particular to a device for filling a storage tank with cryogenic liquid. Background Art

[0002] Industrial cryogenic liquids such as liquid nitrogen and liquid argon are usually transported by cryogenic tank trucks during preparation and transportation, and then filled at the place of use through distribution. When used, they are filled in temporary containers. Due to the characteristics of cryogenic liquids, insulated containers consisting of inner and outer layers are usually used. Vacuum insulation or insulation particles are used in the interlayer to reduce the absorption of ambient heat by the cryogenic liquid, thereby reducing the loss of cryogenic liquid. When the end product is used (such as in factories and food), there is a lack of a convenient, safe and quantitative automatic filling tank system.

[0003] The temperature of cryogenic liquid is very low. For example, the working temperature of liquid nitrogen is usually around -196℃. The existing final stage lacks a good filling system. When directly filling or pouring into the insulated storage tank during use, the liquid comes into direct contact with the air during use, resulting in waste of cryogenic liquid and atomization of water vapor in the air, which blocks the line of sight and affects the operation. Liquid leakage and splashing will make it difficult to control the usage, which can only be done by experience. During the activation process, the container needs to be lifted frequently for dumping, which is not user-friendly, resulting in low efficiency and great consumption of human resources. Summary of the invention

[0004] In view of this, the present invention aims to provide a low-temperature liquid filling tank system which has a simple structure, can automatically fill quantitatively, is more user-friendly and has improved production efficiency, and solves the problems of blocked vision, liquid splashing and difficulty in controlling dosage caused by contact between liquid and air during the filling process, making the working conditions more user-friendly, improving efficiency and reducing human resource consumption.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for filling a storage tank with low-temperature liquid, including a transfer tank body, a circular sealing lip plate is arranged below the upper opening of the transfer tank body, a plurality of guide rods are vertically arranged on the inner bottom of the transfer tank body, and a lightweight sleeve is slidably arranged on the plurality of guide rods, a lightweight sealed floating barrel with an inlet and outlet on the top is fixedly connected to the lightweight sleeve, a hard liquid pipe is fixedly connected to the inner bottom of the sealed floating barrel, the upper end of the hard liquid pipe extends out of the top of the sealed floating barrel, a liquid guide port is opened on the lower end side wall of the hard liquid pipe, and a sealing sleeve for sealing is slidably arranged on the hard liquid pipe. The first sealing floating plate of the inlet and outlet, the circumferential surface of the first sealing floating plate is in sliding sealing cooperation with the inner wall of the sealing floating barrel, an exhaust hole is provided on the first sealing floating plate located outside the inlet and outlet, a connecting rod is vertically arranged at the bottom center of the first sealing floating plate, a liquid guide hole with an inner diameter larger than the outer diameter of the connecting rod is provided at the bottom center of the sealing floating barrel, a second sealing floating plate for sealing the liquid guide hole is movably arranged below the liquid guide hole, the lower end of the connecting rod is connected to the second sealing floating plate, and when the first sealing floating plate seals the inlet and outlet, the second sealing floating plate seals the liquid guide hole.

[0006] The bottom edge of the sealed float is provided with an annular edge extending downward, and a drainage hole is provided on the annular edge. The annular edge and the drainage hole not only allow the cryogenic liquid to enter the sealed float and be discharged, but also prevent the bottom of the sealed float from directly contacting and fitting with the bottom of the storage tank, which would prevent the cryogenic liquid from entering the sealed float and being discharged.

[0007] A handle is provided on the upper part of the hard liquid tube, and a sealing rod is rotatably provided on the handle. A fan-shaped locking plate is provided at the lower end of the sealing rod. A locking column is provided at the top center of the first sealing floating plate, and an annular groove matching the locking plate is provided on the circumferential surface of the locking column.

[0008] The locking plate comprises a guiding section and a locking section, the top surface of the guiding section is a transitional arc surface, and the locking section is a plane.

[0009] The side end of the handle is also hingedly provided with a support rod which can be clamped and fixed with the top side end of the storage tank.

[0010] The top of the sealing rod is also provided with an operating block located above the handle. The operating block can not only limit the sealing rod, but also enable the user to conveniently rotate the sealing rod.

[0011] The bottom center of the transfer tank is a downwardly protruding sink, into which the lower part of the sealed float can fall. The sink can prevent a large amount of cryogenic liquid from being retained at the bottom of the transfer tank and away from the sealed float so that it cannot enter the sealed float for discharge.

[0012] The sealing lip plate is also provided with an air release pipe, and the air release pipe is also provided with an air buzzer.

[0013] A shock plate is also provided on the top of the locking column, an L-shaped connecting plate is also provided on the top of the sealing float, the end of the connecting plate is also provided on the indicator light, and an electrode contact piece adapted to the shock plate is also provided on the bottom of the indicator light; the lightweight sleeve is also provided with an air escape hole for preventing excessive air pressure inside the transfer tank.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: first, when transferring and filling the cryogenic liquid, the contact between the cryogenic liquid and the air can be reduced through the hard liquid pipe, so that the heat absorption of the cryogenic liquid is reduced, and the liquefied gas in the air can be prevented from blocking the line of sight and preventing the user from being unable to observe the filling of the liquid; when the cryogenic liquid is filled into the storage tank, it enters the sealed floating barrel through the hard liquid pipe and flows into the transfer tank body from the liquid guide hole at the bottom of the sealed floating barrel, which reduces the contact between the cryogenic liquid and the outside air. At the same time, the vaporized liquid can be sprayed out through the inlet and outlet above to complete the pre-cooling of the container and reduce the heat absorption of the liquid; when the liquid level rises to the bottom of the sealed floating barrel, the cryogenic liquid on the surrounding side can only be sprayed out from the upper vent pipe and the gas alarm after vaporization, which indicates that the filling of the cryogenic liquid has reached the predetermined value and the liquid inlet valve needs to be closed to complete the filling, which can avoid the previous filling process where the filling of the cryogenic liquid cannot be observed and can only be filled slowly by relying on experience or in small amounts multiple times.

[0015] Secondly, when taking liquid, when the cryogenic liquid in the sealed float is full, the cooperation of the connecting rod, locking column, electric contact plate, indicator light and motor contact piece can automatically remind the user, so that the user can easily take out a fixed amount of cryogenic liquid; in addition, taking and discharging liquid through the sealed float and hard liquid pipe can reduce the splashing, overflow and splashing of cryogenic liquid caused by human factors, reduce liquid waste, and make the operation process safer.

[0016] Thirdly, when discharging liquid, one end of the liquid guiding hose can be connected to the upper end of the hard liquid pipe, and the other end of the liquid guiding hose can be connected to the low-temperature liquid storage tank. Then, the sealing rod can be rotated by the operating block, thereby driving the locking plate to rotate, so that the locking plate can lock the annular groove at the side end of the locking column, and at the same time, the top of the sealing float barrel can be fitted and sealed with the lower part of the sealing lip plate, the top of the first sealing float plate can be fitted and sealed with the top of the sealing float barrel, and the second sealing float plate can be fitted and sealed with the bottom of the sealing float barrel, so that the internal space of the transfer tank body and the sealing float barrel can be sealed; then the handle can be lifted to seal the float barrel, the connecting rod, the sealing rod, The hard liquid pipe, handle and support rod are lifted as a whole. After being lifted to the maximum height, the support rod can be lowered and stuck on the upper edge of the transfer tank. After that, the top of the sealed float is in direct contact with the air, which will cause part of the low-temperature liquid inside the sealed float to vaporize, thereby increasing the air pressure inside the sealed float. However, since the liquid guide hole is sealed by the second sealing float plate and the inlet and outlet are sealed by the first sealing float plate, the low-temperature liquid in the sealed float can only enter the hard liquid pipe through the liquid guide port at the lower part of the hard liquid pipe inside the sealed float, flow out from the hard liquid pipe, and enter the low-temperature liquid storage tank through the liquid guide hose, thereby completing the automatic liquid discharge process. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0019] Figure 3 It is a front cross-sectional structural schematic diagram of the present invention;

[0020] Figure 4 For the present invention Figure 3 A is a schematic diagram of the partially enlarged structure of the middle part;

[0021] Figure 5 It is a structural schematic diagram of the annular groove, the guide section and the locking section of the present invention.

[0022] In the figure: 101, transfer tank; 102, sealing lip plate; 103, guide rod; 104, sealing float; 105, connecting rod; 106, exhaust hole; 107, hard liquid pipe; 108, grip; 109, sealing rod; 110, annular groove; 111, locking plate; 112, liquid guide port; 113, liquid guide hole; 114, sink; 115, inlet and outlet; 116, annular edge ; 117, drainage hole; 118, lightweight sleeve; 119, air escape hole; 120, first sealing floating plate; 121, second sealing floating plate; 122, locking column; 123, guide section; 124, locking section; 201, support rod; 202, operating block; 203, air release pipe; 204, air buzzer; 301, electric shock board; 302, connecting plate; 303, indicator light; 304, electrode contact. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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.

[0024] like Figure 1 , 2As shown in Figures 3 and 4, a device for filling a storage tank with a cryogenic liquid comprises a transfer tank body 101, wherein a circular sealing lip plate 102 is arranged below the upper opening of the transfer tank body 101, a plurality of guide rods 103 are vertically arranged at the inner bottom of the transfer tank body 101, a lightweight sleeve 118 is also slidably arranged on the plurality of guide rods 103, a lightweight sealed float 104 with an inlet and outlet 115 on the top is fixedly connected to the lightweight sleeve 118, a hard liquid tube 107 is fixedly connected to the inner bottom of the sealed float 104, the upper end of the hard liquid tube 107 extends out of the top of the sealed float 104, a liquid guide port 112 is opened on the lower end side wall of the hard liquid tube 107, a first sealed float for sealing the inlet and outlet 115 is slidably arranged on the hard liquid tube 107 The first sealing floating plate 120 has a circumferential surface that is in sliding sealing cooperation with the inner wall of the sealing floating barrel 104. The first sealing floating plate 120 located outside the inlet and outlet 115 is provided with an exhaust hole 106. A connecting rod 105 is vertically arranged at the bottom center of the first sealing floating plate 120. A liquid guide hole 113 with an inner diameter larger than the outer diameter of the connecting rod 105 is arranged at the bottom center of the sealing floating barrel 104. A second sealing floating plate 121 for sealing the liquid guide hole 113 is movably arranged below the liquid guide hole 113. The lower end of the connecting rod 105 is connected to the second sealing floating plate 121. When the first sealing floating plate 120 seals the inlet and outlet 115, the second sealing floating plate 121 seals the liquid guide hole 113. There are four guide rods 103, which are equally arranged at the top of the storage tank. The material of the hard liquid pipe 107 is plastic or stainless steel; the material of the lightweight sleeve 118 and the sealing floating barrel 104 is plastic.

[0025] like Figure 2 , 3 As shown, the bottom edge of the sealed floating barrel 104 is provided with an annular edge 116 extending downward, and the annular edge 116 is provided with a drainage hole 117 .

[0026] like Figure 1 , 2 As shown in Figure 3, a handle 108 is provided on the upper part of the hard liquid tube 107, and a sealing rod 109 is rotatably provided on the handle 108. A fan-shaped locking plate 111 is provided at the lower end of the sealing rod 109. A locking column 122 is provided at the top center of the first sealing floating plate 120, and an annular groove 110 matching the locking plate 111 is provided on the circumferential surface of the locking column 122.

[0027] like Figure 5 As shown, the locking plate 111 includes a guiding section 123 and a locking section 124 . The top surface of the guiding section 123 is a transitional arc surface, and the locking section 124 is a plane.

[0028] like Figure 1 , 2 As shown in Figure 3, the side end of the handle 108 is also hingedly provided with a support rod 201 that can be clamped and fixed to the top side end of the storage tank.

[0029] like Figure 1 , 2 As shown in FIG. 3 , the top of the sealing rod 109 is also provided with an operating block 202 located above the handle 108. The bottom center of the transfer tank 101 is a downwardly protruding sink 114, and the lower part of the sealing float 104 can fall into the sink 114. The sealing lip plate 102 is also provided with an air release pipe 203, and the air release pipe 203 is also provided with an air buzzer 204.

[0030] like Figure 3 As shown, the top of the locking column 122 is also provided with an electric shock plate 301, the top of the sealing buoy is also provided with an L-shaped connecting plate 302, the end of the connecting plate 302 is also provided with an indicator light 303, and the bottom of the indicator light 303 is also provided with an electrode contact piece 304 adapted to the electric shock plate 301. The lightweight sleeve 118 is also provided with an air escape hole 119 for preventing excessive air pressure inside the transfer tank.

[0031] Specifically, when the cryogenic liquid needs to be transferred and stored, the cryogenic liquid can flow out through the liquid guide port 112 of the hard liquid pipe 107 and enter the sealed floating barrel 104, which will have an impact on the second sealed floating plate 121, so that the second sealed floating plate 121 is separated from the first liquid guide hole 113, and then the cryogenic liquid will flow along the liquid guide hole 113 to the second sealed floating plate 121, and then enter the internal space of the transfer tank 101 through the drainage of the second sealed floating plate 121; when the liquid level of the cryogenic liquid reaches the bottom surface of the sealed floating barrel 104, the second sealed floating plate 121 will block the liquid guide hole 113 under the action of buoyancy, and make the connecting rod 105 and the lock The tightening column 122 and the annular groove 110 move upward synchronously until the annular groove 110 moves upward to a position adapted to the locking plate 111. At this time, the gas formed by the vaporization of the cryogenic liquid around the sealing float 104 can only overflow from the vent pipe 203 and pass through the gas alarm 204. When a large amount of gas quickly passes through the gas alarm 204, it will cause the gas alarm 204 to emit a high-frequency sound, prompting the operator that the filling of the cryogenic liquid has been completed; thereafter, the sealing rod 109 can be rotated by the operating block 202, so that the locking plate 111 and the annular groove 110 are clamped and fixed together, and the connection between the sealing float 104 and the first sealing float plate 120 is sealed.

[0032] When discharging liquid, one end of the liquid guide hose can be connected to the upper end of the hard liquid pipe 107, and the other end of the liquid guide hose can be connected to the low-temperature liquid storage tank. Then, the switch of the indicator light 303 is turned on, and then the support rod 201 is lifted, the handle 108 is pressed, and the sealing rod 109 is rotated by the operating block 202 to separate the locking plate 111 from the annular groove 110, so that the seal between the sealing float 104 and the first sealing float 120 is released, and the low-temperature liquid will flow through the liquid guide hole 113. The liquid flows into the sealed float 104, and the gas after the cryogenic liquid is vaporized will be discharged from the sealed float 104 through the exhaust hole 106 and the inlet and outlet 115. After the liquid fills the sealed float 104, the connecting rod 105 will float up, thereby driving the locking column 122 and the electric contact plate 301 to move upward synchronously, and the electric contact plate 301 on the top of the locking column 122 will contact the electrode contact piece 304 at the bottom of the indicator light 303, so that the circuit of the indicator light 303 is connected and lights up, indicating that the next step can be carried out. You can also wait until the next step is needed.

[0033] The next step of the operation is to first rotate the sealing rod 109 through the operating block 202 so that the locking plate 111 and the annular groove 110 are clamped and fixed together, so that the first sealing floating plate 120 seals the top of the sealing float 104, and then lift the handle 108 upward, and when the handle 108 is lifted to the highest position, lower the support rod 201 so that the support rod 201 is clamped and fixed to the top side end of the storage tank, and the sealing float 104, the connecting rod 105, the sealing rod 109, the hard liquid pipe 107, the handle 108, the sealing plate 120 ... The connection rod 108 and the support rod 201 will be stuck at the top of the transfer tank 101 as a whole. At this time, the top of the sealed float 104 will come into contact with the air, causing part of the low-temperature liquid in the sealed float 104 to absorb the heat from the outside air and vaporize and expand, thereby increasing the pressure inside the sealed float 104 and the connecting rod 105, causing the low-temperature liquid to enter the liquid guide port 112, be discharged from the hard liquid pipe 107, and enter the low-temperature liquid storage tank through the liquid guide hose, thereby completing the automatic liquid discharge process.

[0034] After the cryogenic liquid is discharged, the sealing rod 109 can be rotated through the operating block 202 to separate the locking plate 111 from the annular groove 110, so that the seal between the sealing float 104 and the connecting rod 105 is released, thereby discharging the gas. Then, the handle 108 is lifted, and the lower part of the support rod 201 is removed to separate the support rod 201 from the top side end of the transfer tank body 101. The sealing float 104, the connecting rod 105, the sealing rod 109, the hard liquid tube 107, the handle 108, and the support rod 201 are moved downward as a whole, so that the sealing float 104 and the connecting rod 105 enter the interior of the transfer tank body 101, and the cryogenic liquid will be refilled into the sealing float 104 and wait for the next use.

[0035] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A device for filling a storage tank with cryogenic liquid, comprising a transfer tank body (101), Features: A circular sealing lip plate (102) is arranged below the upper opening of the transfer tank body (101), and a plurality of guide rods (103) are vertically arranged on the inner bottom of the transfer tank body (101). A lightweight sleeve (118) is slidably arranged on the plurality of guide rods (103). A lightweight sealing float (104) with an inlet and outlet (115) on the top is fixedly connected inside the lightweight sleeve (118). A hard liquid pipe (107) is fixedly connected to the inner bottom of the sealing float (104). The upper end of the hard liquid pipe (107) extends out of the top of the sealing float (104). A liquid guide port (112) is provided on the lower side wall of the hard liquid pipe (107). A first sealing float plate for sealing the inlet and outlet (115) is slidably arranged on the hard liquid pipe (107). The circumferential surface of the plate (120) is slidably sealed with the inner wall of the sealing floating barrel (104); an exhaust hole (106) is provided on the first sealing floating plate (120) located outside the inlet and outlet (115); a connecting rod (105) is vertically arranged at the bottom center of the first sealing floating plate (120); a liquid guide hole (113) whose inner diameter is larger than the outer diameter of the connecting rod (105) is provided at the bottom center of the sealing floating barrel (104); a second sealing floating plate (121) for sealing the liquid guide hole (113) is movably arranged below the liquid guide hole (113); the lower end of the connecting rod is connected to the second sealing floating plate (121); when the first sealing floating plate (120) seals the inlet and outlet (115), the second sealing floating plate (121) seals the liquid guide hole (113) at the same time.

2. The device for filling a storage tank with cryogenic liquid according to claim 1, Features: The bottom edge of the sealed floating barrel (104) is provided with an annular edge (116) extending downward, and a drainage hole (117) is opened on the annular edge.

3. The device for filling a storage tank with cryogenic liquid as claimed in claim 2, Features: The upper part of the hard liquid tube is provided with a handle (108), and a sealing rod (109) is rotatably provided on the handle (108). The lower end of the sealing rod (109) is provided with a fan-shaped locking plate (111). The top center of the first sealing floating plate (120) is provided with a locking column (122), and the circumferential surface of the locking column (122) is provided with an annular groove (110) that matches the locking plate (111).

4. The device for filling a storage tank with cryogenic liquid as claimed in claim 3, Features: The locking plate (111) comprises a guiding section and a locking section, the top surface of the guiding section is a transitional arc surface, and the locking section is a plane.

5. The device for filling a storage tank with cryogenic liquid according to claim 3 or 4, Features: The side end of the handle (108) is also hingedly provided with a support rod (201) that can be clamped and fixed to the top side end of the transfer tank (101).

6. The device for filling a storage tank with cryogenic liquid according to claim 3, Features: The top of the sealing rod (109) is also provided with an operating block (202) located above the handle (108).

7. The device for filling a storage tank with cryogenic liquid according to claim 1 or 6, Features: The center of the bottom of the transfer tank (101) is a sink protruding downward, and the lower part of the sealing float (104) can fall into the sink.

8. The device for filling a storage tank with cryogenic liquid according to claim 1, Features: The sealing lip plate (102) is also provided with an air release pipe (203), and the air release pipe (203) is also provided with an air buzzer (204).

9. The device for filling a storage tank with cryogenic liquid according to claim 3, Features: The top of the locking column (122) is also provided with an electric shock plate (301), the top of the sealing float barrel (104) is also provided with an L-shaped connecting plate (302), the end of the connecting plate (302) is also provided with an indicator light (303), and the bottom of the indicator light (303) is also provided with an electrode contact piece (304) adapted to the electric shock plate (301).

10. The device for filling a storage tank with cryogenic liquid according to claim 1, Features: The lightweight sleeve (118) is also provided with an air escape hole (119) for preventing excessive air pressure inside the transfer tank (101).

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