A pressure vessel weighing device with support position switching function

Abstract

The utility model provides a kind of pressure vessel weighing device with support position switching function, including weighing sensor, rack, jacking mechanism, slewing mechanism and rotary disc;Rotary disc is located at the top of support platform, rotary disc is equipped with support position, pressure vessel is equipped with tray, and the outside of tray has weighing block, weighing sensor is equipped at the top of rotary disc, and the detection end of weighing sensor is not contacted with any structure when not weighing;When weighing, weighing block is contacted with weighing sensor;Jacking mechanism is installed below support platform, for driving pressure vessel to lift;Slewing mechanism is installed below support platform, and is connected with rotary disc, for driving rotary disc to rotate, and cooperate with the action of jacking mechanism, to switch the rotation angle of rotary disc.The weighing system of the utility model can fall in rotary disc and support when not weighing, to avoid that pressure vessel is long-term pressed on weighing device, and cause to appear weighing precision to drop etc.

Description

Technical Field

[0001] This utility model relates to the field of pressure vessel weighing technology, and in particular to a pressure vessel weighing device with a support position switching function. Background Technology

[0002] Currently, domestic users of bulk industrial gases such as hydrogen, nitrogen, and oxygen generally choose the "fixed storage tank + tank truck refueling" model. These users use fixed gas storage tanks to store high-pressure raw material gases or purified gases, centrally supplying the entire plant's process, experimental, and supporting needs. When the gas level in the tank drops to a set threshold, the gas supplier typically delivers the gas to the site via tank truck, and fills the storage tank with the raw material gas or purified gas from the tank truck through a connector.

[0003] Therefore, during the gas transfer process from tank trucks to storage tanks, trade settlement of the transferred gas volume is required. The specific operation process is as follows: before the gas tank truck is transported to the customer's company, it needs to be initially weighed at a third-party weighbridge; after the gas transfer operation is completed, it returns to the third-party weighbridge for final weighing, and finally calculates the actual gas volume transferred by the difference in mass between the two weighings. This traditional method has obvious drawbacks: on the one hand, the tank truck needs to make multiple trips between the weighbridge and the customer's company, especially in scenarios with long transportation distances or concentrated customer companies, which significantly increases transportation time, raises operating costs significantly, and highlights the problem of low efficiency; on the other hand, the weighing accuracy is constrained by multiple factors, such as ambient temperature, humidity, and the tank truck's parking location, all of which can affect the weighbridge's weighing accuracy. Furthermore, during transportation and gas transfer, vibration and temperature changes may cause gas leaks or pressure fluctuations, further aggravating weighing errors.

[0004] To address the aforementioned issues, a new weighing method has been proposed: installing the weighing device directly at the bottom of the gas tank. This method allows for direct measurement of the mass difference before and after filling during gas transfer, thus providing real-time data on the gas volume. Compared to traditional weighbridges, this method eliminates the need for multiple weighing trips, saving energy costs and improving efficiency. However, this direct weighing method also presents some challenges. Due to the significant weight of the gas tank, prolonged pressure on the weighing device can cause considerable stress, potentially leading to equipment damage or decreased weighing accuracy. Therefore, in practice, very few companies currently adopt this method for weighing the mass of gas transfers. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a pressure vessel weighing device with a support position switching function, which can solve the problem of decreased accuracy caused by long-term pressure on the weighing device.

[0006] This utility model is implemented as follows:

[0007] This utility model provides a pressure vessel weighing device with support position switching function, including a weighing sensor, and further including: a frame with a support platform, a lifting mechanism, a rotating mechanism and a rotating disk;

[0008] The rotating disk is mounted on the top of the support platform, and a tray is provided at the bottom of the pressure vessel. Several weighing blocks are located on the outside of the tray, and several weighing sensors are located on the top of the rotating disk. Each weighing sensor corresponds to one of the weighing blocks.

[0009] The support platform is provided with several support positions, and the bottom of the tray has several fixed support blocks. When not weighing, the fixed support blocks press on the support positions, so that the weighing sensor is separated from the weighing block. When weighing, the lifting mechanism and the rotating mechanism are activated, so that the weighing block presses on the weighing sensor.

[0010] The lifting mechanism is installed below the support platform. The rotating disk is provided with a first arc-shaped groove. A first through hole is opened in the middle of the support position. The support rod of the lifting mechanism passes through the first through hole and the first arc-shaped groove and contacts the tray to drive the pressure vessel to rise and fall.

[0011] The rotary mechanism is installed below the support platform and connected to the rotary disk. It is used to drive the rotary disk to rotate and cooperate with the lifting mechanism to switch the rotation angle of the rotary disk.

[0012] The tray is also equipped with a level for monitoring its horizontal position.

[0013] Furthermore, the lifting mechanism is a screw jack. Before weighing, the support rod of the screw jack can pass through the support platform and the rotating disk to contact the fixed support block at the bottom of the tray, thereby lifting the pressure vessel.

[0014] Furthermore, four screw jacks are provided, one of which is connected to a motor, and adjacent screw jacks are connected by a connecting rod so that the four screw jacks move synchronously.

[0015] Furthermore, four weighing sensors are provided, and the four weighing sensors are arranged in a circular array on the top of the rotating disk.

[0016] Furthermore, each of the aforementioned support positions consists of an outer ring and an inner ring installed inside the outer ring. The height of the outer ring is greater than the height of the inner ring, and the inner diameter of the outer ring is adapted to the fixed support block, so that when not weighing, the fixed support block is embedded in the outer ring and in contact with the top of the inner ring. In this state, the support position supports the gas cylinder via a tray, and the tray does not contact the rotating disk.

[0017] The advantages of this invention are as follows: the coordinated movement of the rotating disc and the lifting mechanism allows the pressure vessel to rest on the weighing sensor during weighing, ensuring the safety of the pressure vessel filling process; when not weighing, the pressure vessel can rest on the frame, preventing the pressure vessel from being pressed against the weighing device for extended periods, which could lead to decreased weighing accuracy. Furthermore, the separable design of the pressure vessel and the weighing device allows for periodic calibration and traceability of the weighing device, solving problems such as fatigue damage or sensor drift that may occur under long-term high-load operation, thus ensuring the accuracy and reliability of weighing. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the lifting mechanism in a pressure vessel weighing device with support position switching function of the present invention when it is raised.

[0020] Figure 2 This is an exploded view of a pressure vessel weighing device with a support position switching function according to the present invention. Figure 1 .

[0021] Figure 3 This is an exploded view of a pressure vessel weighing device with a support position switching function according to the present invention. Figure 2 .

[0022] Figure 4 This is a schematic diagram of the frame structure in this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of a pressure vessel weighing device with a support position switching function according to the present invention. Figure 2 .

[0024] Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle.

[0025] Explanation of the labels in the diagram:

[0026] 1. Pressure vessel; 2. Frame; 21. Support platform; 22. Support position; 221. Outer ring; 222. Inner ring; 223. First through hole; 3. Lifting mechanism; 4. Rotation mechanism; 5. Rotary disk; 6. Weighing block; 7. Tray; 71. Fixed support block; 8. First arc groove; 9. Weighing sensor. Detailed Implementation

[0027] Please see Figures 1 to 6This utility model provides a pressure vessel weighing device with a support position switching function, including a weighing sensor 9, and further including: a frame 2 with a support platform 21, a lifting mechanism 3, a rotating mechanism 4 and a rotating disk 5; in this embodiment, the pressure vessel 1 is a gas storage tank or a liquid storage tank; the frame 2 is set on the ground;

[0028] The rotating disk 5 is rotatably mounted on the top of the support platform 21. The support platform 21 has a circular hole at its center. A connecting part is provided at the center of the bottom of the rotating disk 5. The connecting part passes through the circular hole and connects to the rotary mechanism 4. There are several support positions 22 on the support platform 21. These support positions 22 are two concentric ring structures, with the height of the outer ring 221 being greater than the height of the inner ring 222. The outer ring 221 is also higher than the height of the weighing sensor 9.

[0029] Several support positions 22 are arranged in a circular array on the support platform 21 with the axis of the pressure vessel 1 as the center. A tray 7 is provided at the bottom of the pressure vessel 1. Several weighing blocks 6 are provided on the outside of the tray 7, and several fixed support blocks 71 are provided at the bottom of the tray 7. The fixed support blocks 71 are matched with the support positions 22. In the normal state (when not weighing), the fixed support blocks 71 are recessed into the support positions 22, which plays a fixing role, and the entire tray 7 is pressed on the support positions 22. At this time, the weighing blocks 6 are separated from the weighing sensor 9, that is, the weighing blocks 6 are not in contact with any structure.

[0030] Several weighing sensors 9 are arranged on the top of the rotating disk 5. During weighing, the lifting mechanism 3 and the rotating mechanism 4 are activated to make the weighing block 6 contact the weighing sensors 9.

[0031] The lifting mechanism 3 is installed below the support platform 21. The rotating disk 5 is provided with a first arc-shaped groove 8. The support platform 21 is provided with a support position 22. The support position 22 is provided with a first through hole 223 in the middle. The support rod of the lifting mechanism 3 passes through the first through hole 223 and the first arc-shaped groove 8 and contacts the fixed support block 71 at the lower end of the tray 7 to drive the pressure vessel 1 to rise and fall.

[0032] The rotary mechanism 4 is installed below the support platform 21 and connected to the rotating disk 5. It drives the rotating disk 5 to rotate and, in conjunction with the lifting mechanism 3, switches the rotation angle of the rotating disk 5. The rotary mechanism 4 is a turntable, driven by a second motor to rotate the rotating disk 5.

[0033] Specifically, the lifting mechanism 3 is a screw jack, and the support rod of the screw jack passes through the first through hole 223 of the support platform 21 and the first arc groove 8 of the rotating disk 5, and contacts the fixed support block 71 at the bottom of the tray 7.

[0034] Specifically, four screw jacks are provided, one of which is connected to a motor, and adjacent screw jacks are connected by a connecting rod so that the four screw jacks move synchronously.

[0035] Specifically, four weighing sensors 9 are provided, and the four weighing sensors 9 are arranged in a ring array on the top of the rotating disk 5.

[0036] Specifically, the pallet is also equipped with a level (not shown in the figure) for monitoring the level of the pallet. The level is used to monitor the level of the pressure vessel 1 in its normal state, weighing state, and lifting state.

[0037] Specifically, the support position is coaxial with the first through hole. Each support position is composed of an outer ring and an inner ring installed inside the outer ring. The height of the outer ring is greater than the height of the inner ring. The inner diameter of the outer ring is adapted to the fixed support block, so that when not weighing, the fixed support block is embedded in the outer ring and contacts the top of the inner ring.

[0038] One specific application of this embodiment is:

[0039] In the normal state when not weighing, the weighing block 6 is not in contact with any structure (the detection end of the weighing sensor 9 is separated from the weighing block 6), and the fixed support block 71 under the tray 7 at the bottom of the pressure vessel 1 is recessed into the support position 22, so that the weight of the pressure vessel is supported by the frame 2.

[0040] Before filling with gas (or liquid), the control system controls the support rod of the lifting mechanism 3 to smoothly lift the pressure vessel 1 to the set position. At the same time, the rotary mechanism 4 rotates the rotating disk 5 to the preset position, so that the weighing sensor 9 is directly below the weighing block 6.

[0041] Then, the control system controls the lifting mechanism 3 to fall back to the designated position, so that the weighing block 6 presses on the load cells 9. At this time, the lifting mechanism 3 is not in contact with the tray 7, and the total mass displayed by the four load cells 9 is the current weight of the pressure vessel 1. The total mass is displayed on the control panel.

[0042] After the pressure vessel 1 is filled with gas (or liquid), record the weight of the pressure vessel 1 after filling. By calculating the difference in mass before and after filling, the mass of the filled gas can be accurately obtained.

[0043] After weighing is completed, the control system controls the lifting mechanism 3 to lift again, so that the support rod of the lifting mechanism 3 can smoothly lift the pressure vessel 1 to the set position. Then, the rotary mechanism 4 rotates again, so that the fixed support block 71 is exactly above the support position 22 (at this time, the weighing sensor 9 is misaligned with the weighing block 6).

[0044] Then, the control system controls the lifting mechanism 3 to fall back, so that the fixed support block 71 is recessed into the support position 22, and the weight of the pressure vessel 1 is borne by the worktable 21, so as to avoid the pressure vessel 1 pressing on the weighing sensor 9 for a long time, which would cause problems such as a decrease in weighing accuracy.

[0045] Furthermore, since the weighing sensor 9 is not in contact with the weighing block 6 when not weighing, the requirement for periodic calibration of the weighing sensor 9 can be met, thus solving the problem that the weighing sensor 9 may experience fatigue damage or sensor drift under long-term high-load operation, and ensuring the accuracy and reliability of weighing.

[0046] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A pressure vessel weighing device with support position switching function, comprising a weighing sensor, characterized in that: Also includes: It has a frame supporting a platform, a lifting mechanism, a rotating mechanism, and a rotary table; The rotating disk is mounted on the top of the support platform, and a tray is provided at the bottom of the pressure vessel. Several weighing blocks are located on the outside of the tray, and several weighing sensors are located on the top of the rotating disk. Each weighing sensor corresponds to one of the weighing blocks. The support platform is provided with several support positions, and the bottom of the tray has several fixed support blocks. When not weighing, the fixed support blocks press on the support positions, so that the weighing sensor is separated from the weighing block. When weighing, the lifting mechanism and the rotating mechanism are activated, so that the weighing block presses on the weighing sensor. The lifting mechanism is installed below the support platform. The rotating disk is provided with a first arc-shaped groove. A first through hole is opened in the middle of the support position. The support rod of the lifting mechanism passes through the first through hole and the first arc-shaped groove and contacts the tray to drive the pressure vessel to rise and fall. The rotary mechanism is installed below the support platform and connected to the rotary disk. It is used to drive the rotary disk to rotate and cooperate with the lifting mechanism to switch the rotation angle of the rotary disk. The tray is also equipped with a level for monitoring its horizontal position.

2. The pressure vessel weighing device with support position switching function as described in claim 1, characterized in that: The lifting mechanism is a screw jack. Before weighing, the support rod of the screw jack can pass through the support platform and the rotating disk to contact the fixed support block at the bottom of the tray, thereby lifting the pressure vessel.

3. A pressure vessel weighing device with support position switching function as described in claim 2, characterized in that: The screw jack is provided in four parts, one of which is connected to a motor, and adjacent screw jacks are connected by a connecting rod so that the four screw jacks move synchronously.

4. A pressure vessel weighing device with support position switching function as described in claim 1, characterized in that: The weighing sensor is provided in four parts, which are arranged in a circular array on the top of the rotating disk.

5. A pressure vessel weighing device with support position switching function as described in claim 1, characterized in that: Each of the aforementioned support positions consists of an outer ring and an inner ring installed inside the outer ring. The height of the outer ring is greater than the height of the inner ring. The inner diameter of the outer ring is adapted to the fixed support block, so that when not weighing, the fixed support block is embedded in the outer ring and contacts the top of the inner ring.

Images