Pump conveying pipeline pressure relief protection device and pump conveying system

Abstract

According to the pump conveying pipeline pressure relief protection device and the pump conveying system, by arranging a storage tank, a medium output pipeline, a pump body and a pressure relief valve, a first connector on the pressure relief valve is connected with the storage tank, a second connector on the pressure relief valve is connected with the input end of the pump body, and a third connector on the pressure relief valve is connected with the medium output pipeline; when the internal pressure of the medium output pipeline is smaller than or equal to the preset pressure, the pressure release valve enters a normal use state, namely, the first connector is communicated with the second connector, the third connector is closed, the storage tank is directly communicated with the input end of the pump body at the moment, and the pump body transports the medium from the storage tank to the medium output pipeline; when the internal pressure of the medium output pipeline is larger than the preset pressure, the pressure release valve enters a pressure release state, namely the first connector, the second connector and the third connector are communicated, the pump body input end and the pump body output end are communicated at the moment, and the pump body reaches a self-circulation state, so that the internal pressure of the medium output pipeline is released, and the occurrence of pump suffocation is reduced; therefore, the service lives of the pump body and related elements behind the pump body are prolonged.

Description

Technical Field

[0001] This application relates to the field of pipeline transportation technology, and in particular to a pressure relief protection device for pump transportation pipelines and a pump transportation system. Background Technology

[0002] With the development of pipeline transportation technology, pump transportation pipeline technology has emerged. In pharmaceutical water systems and liquid preparation systems, when transporting clean materials, in order to prevent excessive pressure during transportation, the relevant technologies use variable frequency pumps with flow rate and pressure within a certain range to transport the material medium.

[0003] When selecting a variable frequency pump, the following two situations may occur:

[0004] 1) The wrong model of variable frequency pump was selected, resulting in an excessively high pressure setting.

[0005] 2) There is a blockage in the pipeline at the rear end of the pump.

[0006] Both of these situations can lead to excessive pressure in the pipeline behind the pump. If the pump operates for a long time, it can damage the fittings, instruments, valves, and other components in the pipeline behind the variable frequency pump. The variable frequency pump itself can also be damaged due to excessive pressure at the delivery end. Furthermore, it can cause the variable frequency pump to start at high frequency for a long time, which will affect its service life. Utility Model Content

[0007] Therefore, it is necessary to provide a pressure relief protection device for pump delivery pipelines and a pump delivery system to address the problem of excessive pressure in pump delivery pipelines.

[0008] A pressure relief protection device for a pump delivery pipeline, comprising:

[0009] Storage tank, the storage tank being used to store a medium;

[0010] A medium output pipe, wherein the medium output pipe is used to output the medium;

[0011] The pump body has a pump body inlet and a pump body outlet, and the pump body outlet is connected to the medium outlet pipeline;

[0012] A pressure relief valve has a first interface, a second interface, and a third interface. The first interface is connected to the storage tank, the second interface is connected to the pump body input end, and the third interface is connected to the medium output pipeline. The pressure relief valve has a normal operating state that connects the first interface and the second interface and closes the third interface, and a pressure relief state that allows the first interface, the second interface, and the third interface to communicate with each other.

[0013] Specifically, when the internal pressure of the medium output pipeline is less than or equal to the preset pressure, the pressure relief valve enters the normal operating state; when the internal pressure of the medium output pipeline is greater than the preset pressure, the pressure relief valve enters the pressure relief state.

[0014] The technical solution will be further explained below:

[0015] In one embodiment, a first valve is provided on the pipeline connecting the first interface to the storage tank. The first valve is used to connect or disconnect the connecting pipeline between the first interface and the storage tank. The first valve can be opened when the pressure relief valve reaches the normal operating state; the first valve can be closed when the pressure relief valve reaches the pressure relief state.

[0016] In one embodiment, a second valve is provided on the medium output pipeline, the second valve being used to connect or disconnect the medium output pipeline.

[0017] In one embodiment, both the first valve and the second valve can be one of a pneumatic diaphragm valve, a pneumatic ball valve, or a pneumatic butterfly valve.

[0018] In one embodiment, a pressure transmitter is provided on the medium output pipeline, the pressure transmitter being used to detect the magnitude of the internal pressure of the medium output pipeline.

[0019] In one embodiment, the pressure relief valve further includes a fourth interface for connecting to the compressed air source, which outputs air at the preset pressure to the pressure relief valve.

[0020] In one embodiment, a third valve is provided on the pipe connecting the fourth interface to the compressed air source, the third valve being used to connect or disconnect the connecting pipe between the fourth interface and the compressed air source.

[0021] In one embodiment, the third valve may be one of a pneumatic diaphragm valve, a pneumatic ball valve, or a pneumatic butterfly valve.

[0022] In one embodiment, a cavity is provided at one end of the pressure relief valve. The first interface, the second interface, the third interface, and the fourth interface are all connected to the cavity. The first interface and the second interface are arranged opposite each other and located on both sides of the third interface. The third interface and the fourth interface are arranged opposite each other. A plate is movably disposed in the cavity. When the internal pressure of the medium output pipeline is less than or equal to the preset pressure, the plate closes the third interface to allow the pressure relief valve to enter the normal operating state. When the internal pressure of the medium output pipeline is greater than the preset pressure, the plate opens the third interface to allow the pressure relief valve to enter the pressure relief state.

[0023] A pump delivery system includes the pump delivery pipeline pressure relief protection device described in the above embodiments.

[0024] The aforementioned pump delivery pipeline pressure relief protection device and pump delivery system, through the installation of a storage tank, a medium output pipeline, a pump body, and a pressure relief valve, connects the first port of the pressure relief valve to the storage tank, the second port to the pump body input end, and the third port to the medium output pipeline. When the internal pressure of the medium output pipeline is less than or equal to the preset pressure, the pressure relief valve enters the normal operating state, that is, the first port connects to the second port and the third port is closed. At this time, the storage tank and the pump body input end are directly connected, and the pump body transports the medium from the storage tank to the medium output pipeline. When the internal pressure of the medium output pipeline is greater than the preset pressure, the pressure relief valve enters the pressure relief state, that is, the first port, the second port, and the third port are interconnected. At this time, the pump body input end and the pump body output end are connected, and the pump body reaches a self-circulation state, thereby relieving the internal pressure of the medium output pipeline, reducing the pressure at the pump body output end, effectively ensuring that the pressure at the pump body output end does not exceed the pressure tolerance limit of the related components downstream of the pump body, reducing the occurrence of pump stalling, and thus extending the service life of the pump body and related components downstream of the pump body. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0026] 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.

[0027] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the various components are shown as examples only and not necessarily to scale. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a pump delivery pipeline pressure relief protection device according to an embodiment.

[0029] Figure 2 This is a schematic diagram of the structure of a pressure relief valve according to one embodiment.

[0030] 1. Pressure relief valve; 11. First port; 12. Second port; 13. Third port; 14. Fourth port; 15. Cavity; 16. Plate; 2. Storage tank; 21. First valve; 3. Pump body; 31. Pump body input end; 32. Pump body output end; 4. Medium output pipeline; 41. Second valve; 42. Pressure transmitter; 5. Compressed air source; 51. Third valve. Detailed Implementation

[0031] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0032] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0037] like Figure 1 As shown, 1. The pump delivery pipeline pressure relief protection device of this embodiment includes: a storage tank 2, a medium output pipeline 4, a pump body 3, and a pressure relief valve 1.

[0038] The storage tank 2 is used to store the medium; the medium output pipeline 4 is used to output the medium; the pump body 3 has a pump body input end 31 and a pump body output end 32, and the pump body output end 31 is connected to the medium output pipeline 4; the pressure relief valve 1 has a first interface 11, a second interface 12 and a third interface 13, the first interface 11 is connected to the storage tank 2, the second interface 12 is connected to the pump body input end 31, and the third interface 13 is connected to the medium output pipeline 4. The pressure relief valve 1 has a normal operating state that connects the first interface 11 and the second interface 12 and closes the third interface 13, and a pressure relief state that allows the first interface 11, the second interface 12 and the third interface 13 to communicate with each other.

[0039] When the internal pressure of the medium output pipeline 4 is less than or equal to the preset pressure, the pressure relief valve 1 enters the normal operating state; when the internal pressure of the medium output pipeline 4 is greater than the preset pressure, the pressure relief valve 1 enters the pressure relief state.

[0040] It should be noted that the aforementioned pump delivery pipeline pressure relief protection device and pump delivery system, through the installation of a storage tank 2, a medium output pipeline 4, a pump body 3, and a pressure relief valve 1, connects the first port 11 of the pressure relief valve 1 to the storage tank 2, the second port 12 to the pump body input end 31, and the third port 13 to the medium output pipeline 4. When the internal pressure of the medium output pipeline 4 is less than or equal to a preset pressure, the pressure relief valve 1 enters normal operating mode, that is, the first port 11 connects to the second port 12 and the third port 13 is closed. At this time, the storage tank 2 and the pump body input end 31 are directly connected, and the pump body 3 delivers the medium from the storage tank 2... The medium is transported to the medium output pipeline 4. When the internal pressure of the medium output pipeline 4 is greater than the preset pressure, the pressure relief valve 1 enters the pressure relief state, that is, the first port 11, the second port 12 and the third port 13 are interconnected. At this time, the pump body input end 31 and the pump body output end 32 are connected, and the pump body 3 reaches the self-circulation state, thereby relieving the internal pressure of the medium output pipeline 4, reducing the pressure at the pump body output end 32, effectively ensuring that the pressure at the pump body output end 32 will not exceed the pressure tolerance limit of the related components after the pump body 3, reducing the occurrence of pump blockage, and thus extending the service life of the pump body 3 and the related components after the pump body 3.

[0041] like Figure 1 As shown, in some embodiments, a first valve 21 is provided on the pipeline connecting the first interface 11 and the storage tank 2. The first valve 21 is used to connect or disconnect the connecting pipeline between the first interface 11 and the storage tank 2. Specifically, the first valve 21 can be opened when the pressure relief valve 1 reaches the normal operating state; the first valve 21 can be closed when the pressure relief valve 1 reaches the pressure relief state, so as to prevent the medium in the pipeline from flowing back and contaminating the storage tank 2.

[0042] like Figure 1 As shown, in some embodiments, a second valve 41 is provided on the medium output pipeline 4. The second valve is used to connect or disconnect the medium output pipeline. Specifically, the second valve 41 can be opened when the pressure relief valve 1 reaches the normal operating state; the second valve 41 can be closed when the pressure relief valve 1 reaches the pressure relief state, so that the pump body input end 31 is only interconnected with the pump body output end 32, and the pump body 3 reaches the self-circulation state.

[0043] like Figure 1 As shown, in some embodiments, the first valve 21 and the second valve 41 can both be one of a pneumatic diaphragm valve, a pneumatic ball valve, or a pneumatic butterfly valve. Specifically, different types of valve components can be selected according to different working conditions, the type of medium being transported, and other factors.

[0044] like Figure 1 As shown, in some embodiments, a pressure transmitter 42 is provided on the medium output pipeline 4. The pressure transmitter 42 is used to detect the magnitude of the internal pressure of the medium output pipeline 4 and transmit the data to the control system. The control system then processes the data to control the opening and closing of the first valve 21 and the second valve 41.

[0045] like Figure 1 As shown, in some embodiments, the pressure relief valve 1 further includes a fourth interface 14, which is used to connect to a compressed air source 5. The compressed air source 5 is used to output air at a preset pressure to the pressure relief valve 1. Specifically, the preset pressure is set within a certain range according to the pressure tolerance limit of specific pipe fittings and instrument valves and other components.

[0046] like Figure 1 As shown, in some embodiments, a third valve 51 is provided on the pipe connecting the fourth interface 14 and the compressed air source 5. The third valve 51 is used to connect or disconnect the connecting pipe between the fourth interface 14 and the compressed air source 5. During the operation of the pump delivery pipeline pressure relief protection device and the pump delivery system, the third valve 51 will maintain the connection between the fourth interface 14 and the compressed air source 5. In other situations such as maintenance, the third valve 51 will disconnect the connection between the fourth interface 14 and the compressed air source 5.

[0047] like Figure 1 As shown, in some embodiments, the third valve 51 may be one of a pneumatic diaphragm valve, a pneumatic ball valve, or a pneumatic butterfly valve. Specifically, different types of valve components may be selected according to different working conditions, the type of medium being transported, and other factors.

[0048] like Figure 1 As shown, in some embodiments, one end of the pressure relief valve 1 is provided with a cavity 15. The first port 11, second port 12, third port 13, and fourth port 14 are all connected to the cavity 15. The first port 11 and second port 12 are positioned opposite each other and located on both sides of the third port 13. The third port 13 and fourth port 14 are positioned opposite each other. A plate 16 is movably disposed in the cavity 15. When the internal pressure of the medium output pipeline 4 is less than or equal to a preset pressure, the plate 16 closes the third port 13, allowing the pressure relief valve 1 to enter normal operating condition. When the internal pressure of the medium output pipeline 4 exceeds the preset pressure, the plate 16 opens the third interface 13 to allow the pressure relief valve 1 to enter the pressure relief state, so that the pump body input end 31 is only connected to the pump body output end 32, and the pump body 3 reaches the self-circulation state, thereby relieving the internal pressure of the medium output pipeline 4, reducing the pressure at the pump body output end 32, effectively ensuring that the pressure at the pump body output end 32 will not exceed the pressure tolerance limit of the related components after the pump body 3, reducing the occurrence of pump blockage, and thus extending the service life of the pump body 3 and the related components after the pump body 3.

[0049] like Figure 1 As shown, a pump delivery system in one embodiment includes the pump delivery pipeline pressure relief protection device in the above embodiment. When the pipeline connected to the pump body output end 32 experiences pressure buildup, the pump delivery pipeline pressure relief protection device can release the pressure, ensuring that the pressure at the pump body output end 32 does not exceed the pressure tolerance limit of the related components after the pump body 3, reducing the occurrence of pump buildup, thereby extending the service life of the pump body 3 and the related components after the pump body 3.

[0050] Specifically, such as Figure 1 As shown, in some embodiments, the detailed operating principle of the above-mentioned pump delivery pipeline pressure relief protection device is as follows:

[0051] The third valve 3 remains open, and the compressed air source 5 outputs air at a preset pressure to the cavity 15 through the fourth port 14. The upper part of the plate 16 is subjected to the preset downward pressure of the air. The medium inside the medium output pipe 4 enters the cavity 15 through the third port 13, and the lower part of the plate 16 is subjected to the upward pressure of the medium.

[0052] When the pressure transmitter 42 detects that the pressure inside the medium output pipeline 4 is less than or equal to the preset pressure, the first valve 21 and the second valve 41 remain open under the control of the control system. The downward pressure on the plate 16 is greater than or equal to the upward pressure, so the plate 16 remains in the position of closing the third interface 13, so that the first interface 11 and the second interface 12 are connected, that is, the pressure relief valve 1 enters the normal use state. The storage tank 2 is connected to the pump body input end 31 through the first interface 11 and the second interface 12. The pump body 3 operates normally and transports the medium from the storage tank 2 to the medium output pipeline 4.

[0053] When the pressure transmitter 42 detects that the pressure inside the medium output pipeline 4 is greater than the preset pressure, the first valve 21 and the second valve 41 remain closed under the control of the control system. The downward pressure on the plate 16 is less than the upward pressure, so the plate 16 is pushed up by the medium inside the medium output pipeline 4, causing the third port 13 to open. This allows the first port 11, the second port 12, and the third port 13 to communicate with each other, meaning the pressure relief valve 1 enters the pressure relief state. The pump body input end 31 is connected to the pump body output end 32 through the third port 13 and the second port 12, allowing the pump body 3 to reach a self-circulation state. At this time, the pump body 3 operates at a low frequency, thereby relieving the pressure inside the medium output pipeline 4 until it is less than the preset pressure, at which point the pressure relief valve 1 returns to the normal operating state.

[0054] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A pressure relief protection device for a pump delivery pipeline, characterized in that, include: Storage tank (2), the storage tank (2) is used to store the medium; Medium output pipe (4), the medium output pipe (4) is used to output the medium; Pump body (3), the pump body (3) has a pump body input end (31) and a pump body output end (32), the pump body output end (32) is connected to the medium output pipe (4); The pressure relief valve (1) has a first interface (11), a second interface (12) and a third interface (13). The first interface (11) is connected to the storage tank (2), the second interface (12) is connected to the pump body input end (31), and the third interface (13) is connected to the medium output pipeline (4). The pressure relief valve (1) has a normal operating state that connects the first interface (11) and the second interface (12) and closes the third interface (13), and a pressure relief state that allows the first interface (11), the second interface (12) and the third interface (13) to communicate with each other. When the internal pressure of the medium output pipeline (4) is less than or equal to the preset pressure, the pressure relief valve (1) enters the normal operating state; when the internal pressure of the medium output pipeline (4) is greater than the preset pressure, the pressure relief valve (1) enters the pressure relief state.

2. The pump delivery pipeline pressure relief protection device according to claim 1, characterized in that, A first valve (21) is provided on the pipe connecting the first interface (11) and the storage tank (2). The first valve (21) is used to connect or disconnect the connecting pipe between the first interface (11) and the storage tank (2).

3. The pump delivery pipeline pressure relief protection device according to claim 2, characterized in that, A second valve (41) is provided on the medium output pipeline (4), and the second valve (41) is used to connect or disconnect the medium output pipeline (4).

4. The pump delivery pipeline pressure relief protection device according to claim 3, characterized in that, Both the first valve (21) and the second valve (41) can be one of the following: a pneumatic diaphragm valve, a pneumatic ball valve, or a pneumatic butterfly valve.

5. The pump delivery pipeline pressure relief protection device according to claim 1, characterized in that, A pressure transmitter (42) is installed on the medium output pipeline (4), and the pressure transmitter (42) is used to detect the magnitude of the internal pressure of the medium output pipeline (4).

6. The pump delivery pipeline pressure relief protection device according to claim 1, characterized in that, The pressure relief valve (1) also includes a fourth interface (14), which is used to connect to a compressed air source (5), and the compressed air source (5) is used to output air at the preset pressure to the pressure relief valve (1).

7. The pump delivery pipeline pressure relief protection device according to claim 6, characterized in that, A third valve (51) is provided on the pipe connecting the fourth interface (14) and the compressed air source (5). The third valve (51) is used to connect or disconnect the connecting pipe between the fourth interface (14) and the compressed air source (5).

8. The pump delivery pipeline pressure relief protection device according to claim 7, characterized in that, The third valve (51) may be one of a pneumatic diaphragm valve, a pneumatic ball valve, or a pneumatic butterfly valve.

9. The pump delivery pipeline pressure relief protection device according to claim 6, characterized in that, One end of the pressure relief valve (1) is provided with a cavity (15). The first interface (11), the second interface (12), the third interface (13) and the fourth interface (14) are all connected to the cavity (15). The first interface (11) and the second interface (12) are arranged opposite to each other and located on both sides of the third interface (13). The third interface (13) and the fourth interface (14) are arranged opposite to each other. A plate (16) is movably arranged in the cavity (15). When the pressure inside the medium output pipe (4) is less than or equal to the preset pressure, the plate (16) closes the third interface (13) so that the pressure relief valve (1) enters the normal use state. When the pressure inside the medium output pipe (4) is greater than the preset pressure, the plate (16) opens the third interface (13) so that the pressure relief valve (1) enters the pressure relief state.

10. A pump delivery system, characterized in that, Includes the pump delivery pipeline pressure relief protection device as described in any one of claims 1-9.

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