Jet flow vacuum generating device

Abstract

The utility model belongs to the technical field of vacuum generating devices, and particularly relates to a jet flow vacuum generating device which comprises a water tank and a Venturi tube, the water tank is connected with a circulating pump, a liquid inlet pipe and a liquid outlet pipe, and a circulating pipeline is formed; the venturi tube is mounted on the liquid inlet tube, and a negative pressure opening is formed in the side surface of the venturi tube; the circulating pump, the liquid inlet pipe, the Venturi pipe, the water tank and the liquid outlet pipe form the circulating pipeline, liquid flowing circularly is formed in the circulating pipeline, the negative pressure opening is formed in the side face of the Venturi pipe, and therefore a vacuum generating device can be formed to generate negative pressure to the condenser and the interior of the system. A receiving tank, a buffer tank, a vacuum pump and other devices of a conventional vacuum generator are omitted, the structure and the process are effectively simplified, and cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum generating devices, and particularly relates to a jet vacuum generating device. Background Art

[0002] In some vacuum distillation and wastewater concentration units where the condensate is water or similar materials, vacuum generators are usually used to generate negative pressure in the system. Traditional vacuum generators usually include equipment such as a receiving tank, a buffer tank, and a vacuum pump, with a relatively complex structure and process and high costs, thus needing improvement. Content of the Utility Model

[0003] The purpose of the utility model is to provide a jet vacuum generating device for the above-mentioned existing technical problems, achieving the effect of simplifying the structure of the vacuum generator and the process of generating negative pressure.

[0004] In view of this, the utility model provides a jet vacuum generating device, including:

[0005] A water tank, which is installed and connected with a circulation pump, a liquid inlet pipe, and a liquid outlet pipe, and forms a circulation pipeline;

[0006] A Venturi tube, which is installed on the liquid inlet pipe and has a negative pressure port on the side.

[0007] In the above technical solution, further, it also includes:

[0008] A liquid level sensor, which is installed on the side of the water tank and is used to detect the liquid level height in the water tank;

[0009] A bypass pipe, one end of which is connected to the liquid inlet pipe and the other end is connected to a storage tank;

[0010] Wherein, a bypass valve is arranged on the bypass pipe, and the bypass valve is electrically connected to the liquid level sensor.

[0011] In the above technical solution, further, it also includes:

[0012] A heat exchange mechanism, which is installed in the water tank and is used to keep the liquid pumped out of the water tank by the circulation pump for circulation at room temperature.

[0013] In the above technical solution, further, the heat exchange mechanism includes:

[0014] A housing, which internally forms a cooling chamber, and a cooling water inlet and a cooling water outlet are opened on the cooling chamber;

[0015] Heat exchange tubes, which are installed in the cooling chamber and are respectively communicated with the liquid outlet pipe and the water tank at both ends;

[0016] Wherein, the cooling water inlet is connected with a cooling water inlet pipe, and the cooling water outlet is connected with a cooling water outlet pipe.

[0017] In the above technical solution, further:

[0018] Among them, there are multiple heat exchange tubes, and they are arranged in a matrix.

[0019] In the above technical solution, further:

[0020] A converging chamber is formed between the shell and the inner wall of the water tank, and the liquid outlet pipe is connected to the inner wall of the converging chamber.

[0021] In the above technical solution, further, it further includes:

[0022] An air release pipe, which is installed at the top of the water tank and is used to discharge the gas in the water tank.

[0023] The beneficial effects of the present utility model are:

[0024] 1. A circulation pipeline is formed by a circulation pump, an inlet pipe, a Venturi tube, a water tank and a liquid outlet pipe, and a circulating liquid is formed inside. A negative pressure port is opened on the side of the Venturi tube, and thus a vacuum generating device can be formed to generate negative pressure on the condenser and in the system, canceling devices such as a receiving tank, a buffer tank and a vacuum pump of a conventional vacuum generator, effectively simplifying the structure and process and reducing costs.

[0025] 2. Through the detection and control of the liquid level height in the water tank by a liquid level sensor, when the liquid level in the water tank reaches the set value, the bypass valve on the bypass pipe is opened to discharge the liquid in the water tank, effectively ensuring the continuous operation of the vacuum generator.

[0026] 3. Through the setting of the heat exchange mechanism, the temperature of the liquid in the water tank is always kept at room temperature, avoiding the increase in the liquid temperature caused by the heat generated by the circulation pump and the circulating liquid flow. And under the negative pressure state, the increase in temperature may generate more gas, and the generated gas will affect the negative pressure effect at the Venturi tube. Therefore, the setting of the heat exchange mechanism can effectively maintain the stability and efficiency of the system.

[0027] 4. At the beginning of operation, the gas entering the circulation pipeline through the negative pressure port is mainly gas. Through the setting of the air release pipe, this part of the gas can be discharged to ensure the maintenance of the negative pressure state. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the present utility model;

[0029] Figure 2 is a top view of the present utility model;

[0030] Figure 3 is the present utility model Figure 2 a cross-sectional view taken along line A-A in;

[0031] Figure 4 is a cross-sectional view taken along line B-B in the present utility model Figure 2 ;

[0032] Figure 5 is an enlarged view at position C in the present utility model Figure 4 ;

[0033] The markings in the figure are indicated as follows: 1, water tank; 2, circulation pump; 3, liquid inlet pipe; 4, liquid outlet pipe; 5, Venturi tube; 6, negative pressure port; 7, liquid level sensor; 8, bypass pipe; 9, bypass valve; 10, heat exchange mechanism; 100, housing; 101, cooling chamber; 102, cooling water inlet; 103, cooling water outlet; 104, heat exchange tube; 105, cooling water inlet pipe; 106, cooling water outlet pipe; 107, confluence chamber; 11, gas discharge pipe. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0035] Embodiment 1:

[0036] This embodiment provides a jet vacuum generating device, including:

[0037] A water tank 1, which is installed and connected with a circulation pump 2, a liquid inlet pipe 3 and a liquid outlet pipe 4, and forms a circulation pipeline;

[0038] A Venturi tube 5, which is installed on the liquid inlet pipe 3 and has a negative pressure port 6 opened on the side;

[0039] Among them, the negative pressure port 6 is used to connect to a condenser in a vacuum distillation or wastewater concentration unit where the condensate is water or a similar material;

[0040] At the same time, valves for controlling the opening and closing of the pipeline are provided on both the liquid inlet pipe 3 and the liquid outlet pipe 4.

[0041] It can be seen from this embodiment that a circulation pipeline is formed by the circulation pump 2, the liquid inlet pipe 3, the Venturi tube 5, the water tank 1 and the liquid outlet pipe 4, and a circulating liquid is formed inside. A negative pressure port 6 is opened on the side of the Venturi tube 5, so as to form a vacuum generating device to generate negative pressure on the condenser and in the system, canceling devices such as a receiving tank, a buffer tank and a vacuum pump of a conventional vacuum generator, effectively simplifying the structure and process and reducing costs.

[0042] Embodiment 2:

[0043] This embodiment provides a jet vacuum generating device. In addition to including the technical solutions of the above embodiments, it also has the following technical features. It further includes:

[0044] A liquid level sensor 7, installed on the side of the water tank 1 and used to detect the liquid level height in the water tank 1;

[0045] A bypass pipe 8, one end of which is connected to the liquid inlet pipe 3 and the other end is connected to a storage tank;

[0046] Wherein, a bypass valve 9 is provided on the bypass pipe 8, and the bypass valve 9 is electrically connected to the liquid level sensor 7; and the bypass pipe 8 and the liquid inlet pipe 3 are connected through a tee pipe;

[0047] Moreover, the liquid level sensor 7 is provided with a maximum set liquid level height and a minimum set liquid level height. When the liquid in the water tank 1 reaches the maximum set liquid level height, the bypass valve 9 opens. When the liquid in the water tank 1 reaches the minimum set liquid level height after being discharged through the bypass pipe 8, the bypass valve 9 closes; the specific structure of the liquid level sensor 7 is a mature existing technology and will not be elaborated here;

[0048] Meanwhile, when the bypass valve 9 is opened, it is necessary to appropriately increase the input and output of the circulation pump 2 to reduce the significant decrease in water flow when discharging the liquid in the water tank 1 and avoid affecting the negative pressure effect of the negative pressure port 6 of the Venturi tube 5.

[0049] It can be seen from this embodiment that through the detection and control of the liquid level height in the water tank 1 by the liquid level sensor 7, when the liquid level in the water tank 1 reaches the set value, the bypass valve 9 on the bypass pipe 8 is opened to discharge the liquid in the water tank 1, effectively ensuring the continuous operation of the vacuum generator;

[0050] Moreover, when the liquid in the water tank 1 reaches the set value, it is only necessary to open the bypass valve 9 and appropriately adjust the input and output of the circulation pump 2. Then, only a single circulation pump 2 can be used to maintain the operation of the vacuum generating device, with a simple structure and low manufacturing cost.

[0051] Embodiment 3:

[0052] This embodiment provides a jet vacuum generating device. In addition to including the technical solutions of the above embodiments, it also has the following technical features. It further includes:

[0053] A heat exchange mechanism 10, installed in the water tank 1 and used to keep the liquid pumped out by the circulation pump 2 from the water tank 1 and used for circulation at room temperature.

[0054] As can be seen from this embodiment, through the setting of the heat exchange mechanism 10, the temperature of the liquid in the water tank 1 is always maintained at room temperature, avoiding the increase in the liquid temperature caused by the heat generated by the circulation pump 2 and the circulating flow of the liquid. Moreover, under the negative pressure state, with the increase in temperature, more gas may be generated, and the generated gas will affect the negative pressure effect at the Venturi tube 5. Therefore, the setting of the heat exchange mechanism 10 can effectively maintain the stability and efficiency of the system.

[0055] Embodiment 4:

[0056] This embodiment provides a jet vacuum generating device. In addition to including the technical solutions of the above embodiments, it also has the following technical features. The heat exchange mechanism 10 includes:

[0057] A housing 100, which forms a cooling chamber 101 inside, and a cooling water inlet 102 and a cooling water outlet 103 are opened on the cooling chamber 101;

[0058] A heat exchange tube 104, which is installed in the cooling chamber 101 and is respectively connected to the liquid outlet pipe 4 and the water tank 1 at both ends;

[0059] Among them, the cooling water inlet 102 is connected to a cooling water inlet pipe 105, and the cooling water outlet 103 is connected to a cooling water outlet pipe 106;

[0060] At the same time, the cooling water inlet pipe 105 is located at a high position of the housing 100, the cooling water outlet pipe 106 is located at a low position of the housing 100, and both the cooling water inlet pipe 105 and the cooling water outlet pipe 106 extend to the outside of the water tank 1.

[0061] As can be seen from this embodiment, by forming a cooling chamber 101 and a heat exchange tube 104 inside the housing 100, it is convenient to introduce cooling water into the cooling chamber 101 to exchange heat with the liquid in the heat exchange tube 104 through the heat exchange tube 104, and take away the heat of the liquid in the heat exchange tube 104, effectively ensuring that the liquid in the water tank 1 maintains room temperature and ensuring the stability of the system and the efficiency of generating negative pressure.

[0062] Embodiment 5:

[0063] This embodiment provides a jet vacuum generating device. In addition to including the technical solutions of the above embodiments, it also has the following technical features:

[0064] Among them, there are multiple heat exchange tubes 104, and they are arranged in a matrix.

[0065] As can be seen from this embodiment, by setting the heat exchange tubes 104 to be multiple, the heat exchange efficiency can be improved, the cooling effect on the liquid in the water tank 1 can be ensured, and it can be maintained at room temperature. Moreover, the matrix arrangement can effectively ensure the uniformity of heat exchange and further ensure the heat exchange efficiency.

[0066] Example 6:

[0067] This embodiment provides a jet vacuum generating device. In addition to including the technical solutions of the above embodiments, it also has the following technical features:

[0068] A converging chamber 107 is formed between the housing 100 and the inner wall of the water tank 1, and the liquid outlet pipe 4 is connected to the inner wall of the converging chamber 107.

[0069] It can be seen from this embodiment that by forming the converging chamber 107 between the housing 100 and the inner wall of the water tank 1, the liquid flowing out of the multiple heat exchange tubes 104 converges in the converging chamber 107, which is convenient for being stably extracted through the liquid outlet pipe 4 connected to the inner wall of the converging chamber 107, avoiding the situation of insufficient water volume or chaotic water flow that may be caused by the arrangement of the multiple heat exchange tubes 104, thereby effectively improving the stability and efficiency of the water flow;

[0070] Moreover, by placing the heat exchange mechanism 10 at the connection between the water tank 1 and the liquid outlet pipe 4, the temperature of the liquid entering the liquid outlet pipe 4 and the liquid inlet pipe 3 can be ensured to be stable, effectively preventing the generation of gas in the liquid in the liquid outlet pipe 4 and the liquid inlet pipe 3, and thus affecting the negative pressure state at the Venturi tube 5.

[0071] Example 7:

[0072] This embodiment provides a jet vacuum generating device. In addition to including the technical solutions of the above embodiments, it also has the following technical features, and further includes:

[0073] An air release pipe 11, which is installed at the top of the water tank 1 and is used to discharge the gas in the water tank 1.

[0074] It can be seen from this embodiment that at the beginning of operation, the gas entering the circulation pipeline through the negative pressure port 6 is mainly gas. Through the setting of the air release pipe 11, this part of the gas can be discharged to ensure the maintenance of the negative pressure state.

[0075] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are only illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A jet vacuum generating device, characterized in that, Comprising: A water tank (1) is installed and connected with a circulation pump (2), a liquid inlet pipe (3) and a liquid outlet pipe (4), and a circulation pipeline is formed. A Venturi tube (5) is installed on the liquid inlet pipe (3), and a negative pressure port (6) is provided on the side.

2. The jet vacuum generating device according to claim 1, characterized in that, It further comprises: A liquid level sensor (7) is installed on the side of the water tank (1) and is used to detect the liquid level height in the water tank (1). A bypass pipe (8), one end of which is connected to the liquid inlet pipe (3), and the other end is connected to a storage tank. Wherein, a bypass valve (9) is provided on the bypass pipe (8), and the bypass valve (9) is electrically connected to the liquid level sensor (7).

3. The jet vacuum generating device according to claim 1, characterized in that, It further comprises: A heat exchange mechanism (10) is installed in the water tank (1), and the liquid pumped out of the water tank (1) by the circulation pump (2) and used for circulation is in a normal temperature state.

4. The jet vacuum generating device according to claim 3, characterized in that, The heat exchange mechanism (10) comprises: A housing (100) has a cooling chamber (101) formed inside, and a cooling water inlet (102) and a cooling water outlet (103) are provided on the cooling chamber (101). A heat exchange tube (104) is installed in the cooling chamber (101), and both ends are respectively communicated with the liquid outlet pipe (4) and the water tank (1). Wherein, the cooling water inlet (102) is connected with a cooling water inlet pipe (105), and the cooling water outlet (103) is connected with a cooling water outlet pipe (106).

5. The jet vacuum generating device according to claim 4, characterized in that: Among them, The heat exchange tubes (104) are multiple and arranged in a matrix.

6. The jet vacuum generating device according to claim 5, characterized in that: A converging chamber (107) is formed between the housing (100) and the inner wall of the water tank (1), and the liquid outlet pipe (4) is connected to the inner wall of the converging chamber (107).

7. The jet vacuum generating device according to claim 1, characterized in that, It further comprises: An air release pipe (11) is installed on the top of the water tank (1) and is used to discharge the gas in the water tank (1).

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