Vacuum buffer tank
By introducing a float and sealing structure into the vacuum buffer tank, combined with a pressure sensor and lifting structure, the problem of vacuum level decrease caused by liquid accumulation in the prior art is solved, and automatic liquid discharge and system pressure stabilization are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI NEW KAILUN RAIL TRANSIT NEW MATERIALS CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-05-12
AI Technical Summary
In a vacuum buffer tank, the accumulation of liquid phase substances leads to a decrease in vacuum level. Existing technologies make it difficult to effectively control liquid discharge, affecting the stability of system pressure.
A vacuum buffer tank was designed, comprising a buffer tank body, a drain pipe, a float, and a sealing ball structure. The automatic discharge of liquid is achieved through the coordinated movement of the float and the sealing ball. Combined with a pressure sensor and a lifting structure, it ensures that the liquid is discharged in time when there is excess.
This effectively prevents droplets or mist from entering the downstream vacuum system, maintains the dryness of the system, and prevents excessive liquid from affecting the vacuum level, thus enabling timely control of the liquid.
Smart Images
Figure CN224229741U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of buffer tank technology, specifically a vacuum buffer tank. Background Technology
[0002] Vacuum buffer tanks, as a common gas-liquid separation and pressure stabilization device, are widely used in vacuum systems such as those in waterproof coating production lines. Their main functions include: providing buffer volume for gaseous substances to stabilize system pressure, and separating and temporarily storing liquid components entrained in the gas phase.
[0003] In the existing technology, when a vacuum buffer tank is used to process gaseous materials containing liquid components, the liquid phase continuously accumulates in the tank, causing the liquid in the vacuum buffer tank to increase continuously. Excessive liquid will excessively affect the vacuum degree in the vacuum buffer tank. Therefore, a vacuum buffer tank is proposed to discharge some of the liquid when there is an excess of liquid in the vacuum buffer tank. Utility Model Content
[0004] Based on the above description, this utility model provides a vacuum buffer tank that solves the technical problems pointed out in the background art.
[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A vacuum buffer tank, comprising:
[0006] The buffer tank has a drain pipe at the bottom;
[0007] The overload discharge structure includes a sealing plate located at the center of the bottom wall of the buffer tank. A float is positioned above the sealing plate, and a sealing ball is connected to the bottom of the float via a connecting part. The sealing plate has a discharge port that communicates with a drain pipe. The lower part of the sealing ball matches the discharge port. A slide is provided on the inner wall of the buffer tank, and a slide rail is provided on the outer side of the slide. A slider is slidably connected in the slide rail, and a connecting rod is provided between the slider and the connecting part, allowing the float and the sealing ball to move only up and down.
[0008] Based on the above technical solution, the present invention can be further improved as follows.
[0009] Furthermore, the connecting part consists of a connecting cylinder and a threaded column. The bottom of the connecting cylinder is fixedly connected to the sealing ball, and a threaded cavity is provided at the top of the connecting cylinder. The top of the threaded column is fixedly connected to the float ball, and the threaded column is threadedly connected to the connecting cylinder through the threaded cavity, so that the distance between the float ball and the sealing ball can be adjusted.
[0010] Furthermore, it also includes a lifting structure, in which the sealing plate is vertically and vertically mounted in the buffer tank.
[0011] Furthermore, the lifting structure includes an L-shaped frame, which consists of a long plate fixed to the bottom of the buffer tank and a short plate integrally connected to the bottom of the long plate. A telescopic component is provided on the short plate, and the telescopic end of the telescopic component penetrates through the bottom of the buffer tank and is fixedly connected to the sealing plate.
[0012] Furthermore, the telescopic component is either an electric push rod or a cylinder, and the telescopic stroke of the telescopic component is half the height of the slide rail.
[0013] Furthermore, a sliding rod is vertically fixed in the slide rail, and a sliding hole is provided in the middle of the slider. The slider is slidably connected to the outside of the sliding rod through the sliding hole, and a spring is provided between the slider and the top of the slide rail.
[0014] Furthermore, a pressure sensor is installed on the buffer tank, and the detection end of the pressure sensor is located inside the buffer tank.
[0015] Furthermore, the buffer tank is fixed with an inlet pipe and an outlet pipe, the tops of which both extend from the top of the buffer tank. Initially, the bottom of the buffer tank stores liquid, and the bottom outlet of the inlet pipe is located below the liquid level provided by this liquid.
[0016] Furthermore, the outer side of the buffer tank is welded with three sets of support legs arranged in a circumferential array, so that the bottom of the drain pipe is higher than the ground.
[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0018] 1. The design of the inlet pipe of this vacuum buffer tank allows the material to be directly guided to the bottom of the buffer tank below the liquid surface through this inlet pipe, which can avoid the material being sprayed or splashed directly from the top of the tank. This significantly reduces the possibility of droplets or mist being carried into the downstream vacuum system by the vacuum airflow, thus maintaining relative dryness.
[0019] 2. This vacuum buffer tank is designed with an overload discharge structure, which can discharge excess liquid when liquid material gradually accumulates excessively at the bottom of the buffer tank, thereby controlling the excess liquid and preventing excessive liquid from affecting the vacuum level inside the vacuum buffer tank. Attached Figure Description
[0020] Figure 1 A schematic diagram of the structure of a vacuum buffer tank provided in an embodiment of this utility model;
[0021] Figure 2 for Figure 1 A schematic diagram of a half-section structure;
[0022] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;
[0023] Figure 4 for Figure 1 A schematic diagram of the half-section structure from another perspective;
[0024] Figure 5 This is a schematic diagram of the float and its connecting structure in an embodiment of this utility model.
[0025] The attached diagram lists the components represented by each number as follows:
[0026] 1. Buffer tank; 11. Drain pipe; 12. Inlet pipe; 13. Outlet pipe; 2. Overload discharge structure; 21. Sealing plate; 22. Float; 23. Sealing ball; 24. Slide frame; 25. Slide rail; 26. Sliding block; 27. Connecting rod; 28. Connecting cylinder; 29. Threaded column; 3. Lifting structure; 31. L-shaped frame; 32. Telescopic component; 4. Slide rod; 5. Spring; 6. Pressure sensor; 7. Support leg. Detailed Implementation
[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0028] like Figure 1-5 As shown, a vacuum buffer tank in this embodiment includes a buffer tank body 1 and an overload discharge structure 2. The buffer tank body 1 is a vertical cylindrical container with a cone-shaped bottom for drainage, while the overload discharge structure 2 is used to discharge excess liquid when there is too much liquid in the buffer tank body 1.
[0029] In the above structural design, firstly, a drain pipe 11 is welded to the bottom of the buffer tank 1. An inlet pipe 12 and an outlet pipe 13 are fixed on the buffer tank 1. The tops of the inlet pipe 12 and the outlet pipe 13 both extend from the top of the buffer tank 1. Initially, the bottom of the buffer tank 1 stores liquid. The selection of the liquid depends on the process material itself. Its selection is determined by the industry characteristics and is the liquid phase contained in the input gas medium. For example, if the gas medium contains toluene liquid phase, then this liquid is toluene. However, in the design, the bottom outlet of the inlet pipe 12 is located below the liquid level provided by this liquid.
[0030] With this design, the material is directly guided through this inlet pipe to below the bottom liquid level of the buffer tank 1, avoiding direct spraying or splashing of the material from the top of the tank. This significantly reduces the possibility of droplets or mist being carried into the downstream vacuum system by the vacuum airflow, maintaining relative dryness, and forming a liquid seal to prevent gas or material from flowing back through this pipe.
[0031] In addition, a pressure sensor 6 is installed on the buffer tank 1. The detection end of the pressure sensor 6 is located inside the buffer tank 1 and is used to monitor the pressure inside the buffer tank 1 to support its safe use. For example, the model is the Siemens QBM81. This is existing technology and will not be described in detail here.
[0032] The overload discharge structure 2 is the core structure for achieving overload discharge in this vacuum buffer tank. Specifically, the overload discharge structure 2 includes a sealing plate 21 located at the center of the bottom wall of the buffer tank 1. Its maximum diameter when viewed from above is larger than the diameter of the drain pipe 11. A float 22 is located above the sealing plate 21, and the bottom of the float 22 is connected to a sealing ball 23 via a connecting part. The sealing plate 21 has a discharge port that communicates with the drain pipe 11. That is, when the sealing plate 21 is attached to the bottom wall of the buffer tank 1, the discharge port is the only channel for liquid to flow to the drain pipe 11. The discharge port is, for example, hemispherical, and the lower part of the sealing ball 23 matches the discharge port. In this way, the sealing ball 23 can seal the discharge port. To ensure that the sealing ball 23 and the float 22 can only move linearly up and down, a slide 24 is fixedly installed on the inner wall of the buffer tank 1. A slide rail 25 is opened on the outer side of the slide 24. There are two sets of slides 24, which are arranged opposite to each other. That is, there are also two sets of slide rails 25. For example, on the opposite side of the two sets of slides 24, a slider 26 is slidably connected in the slide rail 25. The slider 26 is affected by the slide rail 25 and can only slide up and down. A connecting rod 27 is provided between the slider 26 and the connecting part. In this way, the float 22 and the sealing ball 23 can only move up and down.
[0033] It should be noted that three sets of support legs 7 arranged in a circular array are welded to the outside of the buffer tank 1, so that the bottom of the drain pipe 11 is higher than the ground. When this vacuum buffer tank is used, an open container needs to be placed below the drain pipe 11 to collect the liquid discharge. The open container is not shown in the figure.
[0034] With this design, initially, the liquid in the buffer tank 1 is lower than the float 22 and higher than the bottom outlet of the inlet pipe 12, while the sealing ball 23 seals the discharge port by gravity. When the feed pipe 12 is fed, the liquid material gradually accumulates at the bottom of the buffer tank 1, the float 22 rises, and drives the sealing ball 23 to rise, the discharge port opens, and the excess liquid is discharged through the drain pipe 11, thereby controlling the excess liquid and preventing the excessive liquid from affecting the vacuum degree in the vacuum buffer tank.
[0035] In one embodiment, a slide rod 4 is vertically fixed in the slide 25, and a sliding hole is opened in the middle of the slider 26. The slider 26 is slidably connected to the outside of the slide rod 4 through the sliding hole. A spring 5 is provided between the slider 26 and the top of the slide 25. It should be noted that the maximum elastic force provided by the spring 5 shall not exceed the buoyancy provided by the float 22, that is, the float 22 will not fail to float. With this design, the spring 5 can provide downward pressure to ensure that the sealing ball 23 is in full contact with the discharge port, ensuring better sealing under normal conditions. In addition, during the subsequent process of the liquid level rising and then falling, the sealing ball 23 can return to its position as soon as possible to complete the sealing.
[0036] To allow the float 22 to be adjusted in level within the buffer tank 1 during initial installation, the connecting part consists of a connecting cylinder 28 and a threaded post 29. The connecting rod 27 is fixedly connected to the connecting cylinder 28, and the bottom of the connecting cylinder 28 is fixedly connected to the sealing ball 23. A threaded cavity is provided at the top of the connecting cylinder 28, and the top of the threaded post 29 is fixedly connected to the float 22. The threaded post 29 is threadedly connected to the connecting cylinder 28 through the threaded cavity, allowing the distance between the float 22 and the sealing ball 23 to be adjusted, thereby controlling the level of the float 22 in the buffer tank 1, i.e., controlling when to perform excessive discharge.
[0037] In addition, considering that sometimes the liquid in the buffer tank 1 needs to be completely drained, in one embodiment, the vacuum buffer tank also includes a lifting structure 3, and the sealing plate 21 is raised and lowered in the buffer tank 1 through the lifting structure 3.
[0038] Further explanation: The lifting structure 3 includes an L-shaped frame 31, which consists of a long plate fixed to the bottom of the buffer tank 1 and a short plate integrally connected to the bottom of the long plate. A telescopic component 32 is fixedly installed on the short plate by bolts. The telescopic end of the telescopic component 32 passes through the bottom of the buffer tank 1 and is fixedly connected to the sealing plate 21.
[0039] It should be noted that the telescopic component 32 is either an electric push rod or a cylinder, and the telescopic stroke of the telescopic component 32 is half the height of the slide rail 25, ensuring that the slider 26 always slides within the effective stroke of the slide rail 25, thus avoiding damage to the spring 5.
[0040] With this design, when it is necessary to drain all the liquid in the buffer tank 1, the telescopic component 32 can be activated to raise the sealing plate 21, so that the buffer tank 1 can directly drain the liquid from the drain pipe 11.
[0041] In summary:
[0042] Initial state: The liquid in the buffer tank 1 is below the float 22 and above the bottom outlet of the inlet pipe 12, forming a liquid seal, which prevents gas or material from flowing back through this pipe. Since the material is directly guided to the bottom liquid level of the buffer tank 1 through this inlet pipe, it can avoid the material from being sprayed or splashed directly from the top of the tank. This significantly reduces the possibility of droplets or mist being carried into the downstream vacuum system by the vacuum airflow, keeping it relatively dry. In addition, the sealing ball 23 is limited by gravity and spring 5, allowing the sealing ball 23 to better seal the discharge port.
[0043] Liquid level rise triggers drainage: When gaseous material containing liquid phase components is fed from feed pipe 12, the liquid phase material gradually accumulates at the bottom of buffer tank 1. When the liquid level causes float 22 to rise, sealing ball 23 will also rise, that is, the discharge port opens, and excess liquid is discharged through drain pipe 11, thereby controlling the excess liquid. After the discharge is in place, sealing ball 23 returns to its position and re-seals.
[0044] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A vacuum buffer tank, characterized in that, include: The buffer tank (1) is equipped with a drain pipe (11) at the bottom. The overload discharge structure (2) includes a sealing plate (21) located at the center of the bottom wall of the buffer tank (1). A float (22) is provided above the sealing plate (21). The bottom of the float (22) is connected to a sealing ball (23) through a connecting part. The sealing plate (21) has a discharge port connected to the drain pipe (11). The lower part of the sealing ball (23) matches the discharge port. A slide (24) is provided on the inner wall of the buffer tank (1). A slide rail (25) is provided on the outer side of the slide rail (24). A slider (26) is slidably connected in the slide rail (25). A connecting rod (27) is provided between the slider (26) and the connecting part, so that the float (22) and the sealing ball (23) can only move up and down.
2. A vacuum buffer tank according to claim 1, characterized in that: The connecting part consists of a connecting cylinder (28) and a threaded column (29). The bottom of the connecting cylinder (28) is fixedly connected to the sealing ball (23). A threaded cavity is provided at the top of the connecting cylinder (28). The top of the threaded column (29) is fixedly connected to the float (22). The threaded column (29) is threadedly connected to the connecting cylinder (28) through the threaded cavity, so that the distance between the float (22) and the sealing ball (23) can be adjusted.
3. A vacuum buffer tank according to claim 2, characterized in that: It also includes a lifting structure (3), in which the sealing plate (21) is mounted in the buffer tank (1) in a way that allows it to be lifted and lowered via the lifting structure (3).
4. A vacuum buffer tank according to claim 3, characterized in that: The lifting structure (3) includes an L-shaped frame (31), which consists of a long plate fixed to the bottom of the buffer tank (1) and a short plate integrally connected to the bottom of the long plate. A telescopic component (32) is provided on the short plate. The telescopic end of the telescopic component (32) passes through the bottom of the buffer tank (1) and is fixedly connected to the sealing plate (21).
5. A vacuum buffer tank according to claim 4, characterized in that: The telescopic component (32) is either an electric push rod or a cylinder, and the telescopic stroke of the telescopic component (32) is half the height of the slide rail (25).
6. A vacuum buffer tank according to claim 5, characterized in that: A slide rod (4) is vertically fixed in the slide rail (25). A sliding hole is provided in the middle of the slider (26). The slider (26) is slidably connected to the outside of the slide rod (4) through the sliding hole. A spring (5) is provided between the slider (26) and the top of the slide rail (25).
7. A vacuum buffer tank according to claim 6, characterized in that: A pressure sensor (6) is installed on the buffer tank (1), and the detection end of the pressure sensor (6) is located inside the buffer tank (1).
8. A vacuum buffer tank according to any one of claims 1-7, characterized in that: The buffer tank (1) is fixed with an inlet pipe (12) and an outlet pipe (13). The tops of the inlet pipe (12) and the outlet pipe (13) both protrude from the top of the buffer tank (1). The bottom of the buffer tank (1) is initially filled with liquid, and the bottom outlet of the inlet pipe (12) is below the liquid level provided by this liquid.
9. A vacuum buffer tank according to claim 8, characterized in that: The buffer tank (1) is welded with three sets of support legs (7) arranged in a circular array on the outside, so that the bottom of the drain pipe (11) is higher than the ground.