Liquid nitrogen filling machine

Abstract

The application relates to the technical field of liquid nitrogen filling, and discloses a liquid nitrogen filling machine, which comprises a filling machine shell, a filling pipe is arranged at the right side of the filling machine shell, a liquid outlet pipe is arranged at the bottom of the filling machine shell, a valve ball is slidably arranged in the filling machine shell, the valve ball is matched with the liquid outlet pipe, a sliding seat is slidably arranged in the filling machine shell, the sliding seat is located at the left side of the valve ball, and a pressure monitoring mechanism is arranged between the sliding seat and the valve ball; an adjusting mechanism is arranged at the left side of the filling machine shell, a function box is fixedly arranged at the top of the filling machine shell, and a plate hole is formed in the right side of the function box. The application has the following advantages and effects: the monitoring mechanism can be used for accurately monitoring the pressure of liquid nitrogen, the system pressure state can be grasped by an operator in time, and the purpose of preventing safety hazards caused by abnormal pressure is achieved; and the adjusting mechanism can be used for flexibly adapting the pressure parameters under different filling scenes.

Description

Technical Field

[0001] This application relates to the field of liquid nitrogen injection technology, and in particular to a liquid nitrogen injection machine. Background Technology

[0002] In many fields such as modern industrial production, biomedicine, and food freezing, liquid nitrogen is widely used in cooling, freezing, and preservation processes due to its ultra-low temperature characteristics. As the core equipment for achieving precise liquid nitrogen delivery, the performance of the liquid nitrogen filling machine directly affects production quality and efficiency.

[0003] A search revealed a patent document with authorization announcement number CN210716926U, which discloses a liquid nitrogen filling machine. The machine includes an inlet pipe and an outlet connected to the inlet pipe. A liquid nitrogen buffer tank is connected to the inlet pipe, and a liquid nitrogen storage device is installed on the buffer tank. The liquid nitrogen storage device has an outlet and a sealing valve. The buffer tank includes an outer buffer box and an inner buffer box, with a buffer cavity inside the inner buffer box. The inlet pipe is connected to the buffer cavity, and multiple buffer plates are installed inside the buffer cavity. The buffer plates are fixedly connected to the inner buffer box. The liquid nitrogen storage device includes an outer storage box and an inner storage box, with a liquid nitrogen storage chamber inside the inner storage box. The buffer cavity and the liquid nitrogen storage chamber are connected via a double-layer vacuum pipe, and the outlet is connected to the liquid nitrogen storage chamber. This invention can reduce the impact of liquid nitrogen on the receiving device.

[0004] In practical use, it was found that during the operation of traditional equipment, it is difficult for operators to intuitively obtain key parameters such as liquid nitrogen pressure and valve ball status. Frequent shutdowns for inspection or the use of additional testing equipment are required, which not only reduces work efficiency but also increases the complexity of operation and labor intensity. Therefore, we have proposed a liquid nitrogen filling machine to solve the above problems. Utility Model Content

[0005] The purpose of this application is to address the shortcomings of existing technologies, such as the difficulty in intuitively obtaining key parameters like liquid nitrogen pressure and valve ball status, the need for frequent shutdowns for inspection or the use of additional testing equipment, which not only reduces work efficiency but also increases operational complexity and labor intensity. Therefore, a liquid nitrogen filling machine is proposed.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a liquid nitrogen filling machine, including a filling machine housing, a filling pipe provided on the right side of the filling machine housing, a liquid outlet pipe provided at the bottom of the filling machine housing, a valve ball slidably installed inside the filling machine housing, the valve ball being adapted to the liquid outlet pipe, a slide seat slidably installed inside the filling machine housing, the slide seat being located to the left of the valve ball, a pressure monitoring mechanism being provided between the slide seat and the valve ball; an adjustment mechanism being provided on the left side of the filling machine housing, a function box being fixedly installed on the top of the filling machine housing, a plate hole being opened on the right side of the function box, a rotating shaft being rotatably installed on the bottom inner wall of the function box, the top end of the rotating shaft extending to the outside of the function box, an indicating mechanism being provided between the rotating shaft and the function box, and a gear mechanism being provided between the rotating shaft and the plate hole.

[0007] A further feature of this application is that the monitoring mechanism includes a pressure sensor and a spring, with the pressure sensor located on the right side of the slide and the spring fixedly installed on the left side of the valve ball, the left end of the spring being adapted to the pressure sensor.

[0008] By adopting the above technical solution and setting up a monitoring mechanism, when the valve ball moves to the left, the spring is compressed accordingly. The left end of the spring contacts the pressure sensor on the right side of the slide and generates pressure. The pressure sensor can transmit the real-time pressure signal to the controller, which can realize accurate monitoring of liquid nitrogen pressure, so that operators can keep abreast of the system pressure status and prevent safety hazards caused by abnormal pressure.

[0009] A further configuration of this application is as follows: the adjustment mechanism includes a screw and a knob, the screw is threadedly installed on the left side of the injection machine housing, the right end of the screw extends into the injection machine housing, the right end of the screw is adapted to the left side of the slide, and a knob is provided on the left end of the screw.

[0010] By adopting the above technical solution and setting an adjustment mechanism, the screw can be rotated by turning the knob. This allows the screw to push the slide block to slide to the right inside the housing, changing the initial compression of the spring and thus adjusting the pressure value required to open the valve ball. This enables flexible adaptation of pressure parameters under different injection scenarios.

[0011] A further configuration of this application is as follows: the indicating mechanism includes a pointer, a dial, and scale values. A pointer is provided on a rotating shaft and is located outside the function box. A dial is provided on the top of the function box, and the rotating shaft is located inside the dial. Scale values ​​are provided on the inner wall of the dial, and the pointer and scale values ​​are matched.

[0012] By adopting the above technical solution and setting an indicating mechanism, the scale value pointed to by the pointer can intuitively reflect the displacement of the valve ball, thereby indirectly reflecting the pressure of liquid nitrogen. This enables a visual display of the pressure status, facilitating operators to quickly judge the operating status of the equipment.

[0013] A further feature of this application is that the gear mechanism includes a rack plate and a gear, the rack plate is slidably installed on the inner wall of the rear side of the plate hole, the gear is fixedly sleeved on the rotating shaft, the gear is located in the function box, the rack plate meshes with the gear, and a connecting mechanism is provided between the rack plate and the valve ball.

[0014] By adopting the above technical solution and by setting up a gear mechanism, the connecting plate can drive the gear to rotate through the rack plate, thereby achieving the purpose of driving the rotating shaft to rotate.

[0015] A further configuration of this application is as follows: the connecting mechanism includes a connecting rod and a connecting plate, a connecting rod is fixedly installed on the right side of the valve ball, the right end of the connecting rod extends to the outside of the filling machine housing, the filling pipe is located below the connecting rod, a connecting plate is fixedly installed on the right end of the rack plate, and the left side of the connecting plate is fixedly connected to the right end of the connecting rod.

[0016] By adopting the above technical solution and by setting a connecting mechanism, the valve ball can drive the rack plate to move synchronously when it moves.

[0017] A further feature of this application is that a controller is provided on the front side of the casing of the injection machine, and the controller is electrically connected to the pressure sensor.

[0018] By adopting the above technical solution and by setting up a controller, the controller can receive and process the pressure sensor signals.

[0019] A further feature of this application is that two support frames are fixedly installed at the bottom of the injection machine casing, and the liquid outlet pipe is located between the two support frames.

[0020] By adopting the above technical solution and setting up a support frame, the support frame can provide stable support for the equipment, avoid the equipment displacement caused by vibration during the grouting process, and ensure operational stability.

[0021] The beneficial effects of this application are:

[0022] (1) Through the cooperation of valve ball, spring, slide and pressure sensor, when the operator injects liquid nitrogen into the filling machine housing through the filling pipe, the liquid nitrogen enters the housing and generates pressure on the right side of valve ball, which can push valve ball to slide to the left. The spring is compressed accordingly. The pressure sensor can transmit the real-time pressure signal to the controller, which can realize accurate monitoring of liquid nitrogen pressure, so that the operator can grasp the system pressure status in time and prevent safety hazards caused by abnormal pressure.

[0023] (2) Through the cooperation of connecting rod, connecting plate, rack plate, gear, rotating shaft, pointer and scale value, the rack plate can be moved to the left by the valve ball, which can drive the rotating shaft to rotate. The scale value pointed to by the pointer can intuitively reflect the displacement of the valve ball, and thus indirectly reflect the pressure of liquid nitrogen. It can realize the visual display of pressure status, which is convenient for operators to quickly judge the operating status of the equipment.

[0024] (3) By cooperating with the knob, screw and slide, when it is necessary to adjust the pressure threshold according to the injection requirements, turn the knob to drive the screw to rotate, the screw will push the slide to slide to the right in the machine housing, change the initial compression degree of the spring, thereby adjusting the pressure value required to open the valve ball, so as to achieve the purpose of flexibly adapting the pressure parameters under different injection scenarios. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a liquid nitrogen filling machine according to this application;

[0027] Figure 2 This is a schematic diagram of the internal structure of the casing of a liquid nitrogen filling machine according to this application;

[0028] Figure 3 This is a schematic diagram of the internal structure of the functional box of a liquid nitrogen filling machine according to this application;

[0029] Figure 4 This is a schematic diagram of structure A of a liquid nitrogen filling machine according to this application.

[0030] In the diagram: 1. Filling machine housing; 2. Valve ball; 3. Slide seat; 4. Function box; 5. Screw; 6. Rotating shaft; 7. Dial; 8. Plate hole; 9. Support frame; 101. Filling pipe; 102. Discharge pipe; 201. Connecting rod; 202. Connecting plate; 301. Pressure sensor; 302. Spring; 501. Knob; 601. Pointer; 701. Scale value; 801. Rack plate; 802. Gear. Detailed Implementation

[0031] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] See Figures 1-4 This application provides a liquid nitrogen filling machine, including a filling machine housing 1. A filling pipe 101 is provided on the right side of the filling machine housing 1, and a liquid outlet pipe 102 is provided at the bottom of the filling machine housing 1. A valve ball 2 is slidably installed inside the filling machine housing 1, and the valve ball 2 is adapted to the liquid outlet pipe 102. A slide seat 3 is slidably installed inside the filling machine housing 1, and the slide seat 3 is located to the left of the valve ball 2. A pressure monitoring mechanism is provided between the slide seat 3 and the valve ball 2. An adjustment mechanism is provided on the left side of the filling machine housing 1. A function box 4 is fixedly installed on the top of the filling machine housing 1. A plate hole 8 is opened on the right side of the function box 4. A rotating shaft 6 is rotatably installed on the bottom inner wall of the function box 4. The top end of the rotating shaft 6 extends to the outside of the function box 4. An indicating mechanism is provided between the rotating shaft 6 and the function box 4. A gear mechanism is provided between the rotating shaft 6 and the plate hole 8.

[0033] Specifically, the monitoring mechanism includes a pressure sensor 301 and a spring 302. The pressure sensor 301 is installed on the right side of the slide block 3, and the spring 302 is fixedly installed on the left side of the valve ball 2. The left end of the spring 302 is adapted to the pressure sensor 301.

[0034] Specifically, the adjustment mechanism includes a screw 5 and a knob 501. The screw 5 is threadedly installed on the left side of the injection machine housing 1. The right end of the screw 5 extends into the injection machine housing 1. The right end of the screw 5 is adapted to the left side of the slide block 3. The knob 501 is provided on the left end of the screw 5.

[0035] Specifically, the indicating mechanism includes a pointer 601, a dial 7, and a scale value 701. The pointer 601 is mounted on the rotating shaft 6 and is located outside the function box 4. The dial 7 is mounted on the top of the function box 4, and the rotating shaft 6 is located inside the dial 7. The scale value 701 is set on the inner wall of the dial 7, and the pointer 601 is matched with the scale value 701.

[0036] Specifically, the gear mechanism includes a rack plate 801 and a gear 802. The rack plate 801 is slidably installed on the inner wall of the rear side of the plate hole 8. The gear 802 is fixedly sleeved on the rotating shaft 6. The gear 802 is located in the function box 4. The rack plate 801 and the gear 802 mesh with each other. A connecting mechanism is provided between the rack plate 801 and the valve ball 2.

[0037] Specifically, the connecting mechanism includes a connecting rod 201 and a connecting plate 202. The connecting rod 201 is fixedly installed on the right side of the valve ball 2. The right end of the connecting rod 201 extends to the outside of the filling machine housing 1. The filling pipe 101 is located below the connecting rod 201. The connecting plate 202 is fixedly installed on the right end of the rack plate 801. The left side of the connecting plate 202 is fixedly connected to the right end of the connecting rod 201.

[0038] Specifically, a controller is installed on the front side of the injection machine housing 1, and the controller is electrically connected to the pressure sensor 301.

[0039] Specifically, two support frames 9 are fixedly installed at the bottom of the injection machine casing 1, and the liquid outlet pipe 102 is located between the two support frames 9.

[0040] In this application, during use, the operator first injects liquid nitrogen into the casing 1 of the filling machine through the filling pipe 101. After the liquid nitrogen enters the casing, it generates pressure on the right side of the valve ball 2, which pushes the valve ball 2 to slide to the left. The spring 302 on the left side of the valve ball 2 is compressed accordingly. The left end of the spring 302 contacts the pressure sensor 301 on the right side of the slide block 3 and generates pressure. The pressure sensor 301 can transmit the real-time pressure signal to the controller, which can realize accurate monitoring of the liquid nitrogen pressure, so that the operator can keep abreast of the system pressure status and prevent safety hazards caused by abnormal pressure. At the same time, when the valve ball 2 moves to the left, it can drive the connecting plate 202 to move to the left synchronously through the connecting rod 201. The connecting plate 202 pulls the rack plate 801 to slide in the plate hole 8. The rack plate 801 meshes with the gear 802 to drive the rotating shaft 6 to rotate. The pointer 601 on the rotating shaft 6 rotates with the rotating shaft 6 in the dial 7. The scale value 701 pointed to by the pointer 601 can intuitively reflect the displacement of the valve ball 2. The volume indirectly reflects the liquid nitrogen pressure, enabling visual display of the pressure status and facilitating quick assessment of equipment operation by operators. When the pressure threshold needs adjustment based on injection requirements, rotating knob 501 rotates screw 5. Since screw 5 is threadedly connected to the left side of the injection machine housing 1, screw 5 pushes slide block 3 to slide to the right within the housing, changing the initial compression of spring 302 and thus adjusting the pressure value required to open valve ball 2. This allows for flexible adaptation of pressure parameters to different injection scenarios. When the liquid nitrogen pressure reaches the set threshold, valve ball 2 is fully pushed open, separating from the outlet pipe 102, allowing liquid nitrogen to flow steadily out through the outlet pipe 102 for injection. When the pressure is below the threshold, spring 302 pushes valve ball 2 back to its original position, closing the outlet pipe 102 and stopping injection, ensuring precise control of the injection volume. The two support frames 9 at the bottom provide stable support for the equipment, preventing displacement due to vibration during injection and ensuring operational stability.

Claims

1. A liquid nitrogen filling machine, characterized in that, The machine includes a filling machine housing (1), a filling pipe (101) is provided on the right side of the filling machine housing (1), a liquid outlet pipe (102) is provided at the bottom of the filling machine housing (1), a valve ball (2) is slidably installed inside the filling machine housing (1), the valve ball (2) is adapted to the liquid outlet pipe (102), a slide seat (3) is slidably installed inside the filling machine housing (1), the slide seat (3) is located to the left of the valve ball (2), and a pressure monitoring mechanism is provided between the slide seat (3) and the valve ball (2). An adjustment mechanism is provided on the left side of the casing (1) of the injection machine. A function box (4) is fixedly installed on the top of the casing (1). A plate hole (8) is opened on the right side of the function box (4). A rotating shaft (6) is rotatably installed on the inner wall of the bottom of the function box (4). The top end of the rotating shaft (6) extends to the outside of the function box (4). An indicator mechanism is provided between the rotating shaft (6) and the function box (4). A gear mechanism is provided between the rotating shaft (6) and the plate hole (8).

2. The liquid nitrogen filling machine according to claim 1, characterized in that: The monitoring mechanism includes a pressure sensor (301) and a spring (302). The pressure sensor (301) is provided on the right side of the slide (3), and the spring (302) is fixedly installed on the left side of the valve ball (2). The left end of the spring (302) is adapted to the pressure sensor (301).

3. The liquid nitrogen filling machine according to claim 1, characterized in that: The adjustment mechanism includes a screw (5) and a knob (501). The screw (5) is threadedly installed on the left side of the injection machine housing (1). The right end of the screw (5) extends into the injection machine housing (1). The right end of the screw (5) is adapted to the left side of the slide (3). The knob (501) is provided on the left end of the screw (5).

4. A liquid nitrogen filling machine according to claim 1, characterized in that: The indicating mechanism includes a pointer (601), a dial (7), and scale values ​​(701). The pointer (601) is mounted on the rotating shaft (6). The pointer (601) is located outside the function box (4). The dial (7) is mounted on the top of the function box (4). The rotating shaft (6) is located inside the dial (7). The scale values ​​(701) are mounted on the inner wall of the dial (7). The pointer (601) is matched with the scale values ​​(701).

5. A liquid nitrogen filling machine according to claim 4, characterized in that: The gear mechanism includes a rack plate (801) and a gear (802). The rack plate (801) is slidably installed on the inner wall of the rear side of the plate hole (8). The gear (802) is fixedly sleeved on the rotating shaft (6). The gear (802) is located in the function box (4). The rack plate (801) and the gear (802) mesh. A connecting mechanism is provided between the rack plate (801) and the valve ball (2).

6. A liquid nitrogen filling machine according to claim 5, characterized in that: The connecting mechanism includes a connecting rod (201) and a connecting plate (202). The connecting rod (201) is fixedly installed on the right side of the valve ball (2). The right end of the connecting rod (201) extends to the outside of the filling machine housing (1). The filling pipe (101) is located below the connecting rod (201). The connecting plate (202) is fixedly installed on the right end of the rack plate (801). The left side of the connecting plate (202) is fixedly connected to the right end of the connecting rod (201).

7. A liquid nitrogen filling machine according to claim 1, characterized in that: A controller is provided on the front side of the casing (1) of the injection machine, and the controller is electrically connected to the pressure sensor (301).

8. A liquid nitrogen filling machine according to claim 1, characterized in that: The bottom of the casing (1) of the injection machine is fixedly installed with two support frames (9), and the liquid outlet pipe (102) is located between the two support frames (9).

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