A horizontal centrifugal pump liquid induction device and system

Abstract

The utility model provides a kind of horizontal centrifugal pump liquid induction device and system, by setting higher vacuum liquid induction tank of horizontal centrifugal pump and liquid storage pool and limiting its volume less than horizontal centrifugal pump, make device form high liquid seal environment after liquid injection valve first liquid injection, when horizontal centrifugal pump starts, pump cavity negative pressure is passed to vacuum liquid induction tank top space by liquid outlet pipe, vacuum effect is formed in tank, liquid storage pool liquid is inhaled into vacuum liquid induction tank under the action of atmospheric pressure through liquid inlet pipe, realize the active liquid induction of low liquid level liquid storage pool;Liquid inlet pipe and liquid outlet pipe adopt detachable connection mode, can be adjusted according to the actual use of the specific installation site of device, with higher flexibility.The utility model can be used for existing conventional horizontal centrifugal pump, solve the technical problems that existing horizontal centrifugal pump is difficult to cope with common low liquid level working condition, restrict production efficiency and equipment selection flexibility.

Description

Technical Field

[0001] This utility model belongs to the technical field, specifically relating to a horizontal centrifugal pump priming device and system. Background Technology

[0002] Horizontal centrifugal pumps play a vital role in chemical production processes due to their simple structure, stable and reliable operation, and relatively convenient maintenance. They are widely used to transport various process liquids, circulating cooling water, raw material solutions, and wastewater treatment, and are one of the basic equipment to ensure the continuous and efficient operation of chemical plants. Their mature design and wide applicability make them one of the preferred pump types for fluid transportation in the chemical industry.

[0003] However, when the liquid level is lower than the pump shaft (i.e., in a low-level operating condition), such as when taking liquid from a low-level collection tank, treating liquid in a low-level storage tank, or utilizing a natural low-level water source, ordinary horizontal centrifugal pumps cannot effectively start due to their lack of self-priming capability. This forces chemical companies to choose submersible pumps or submersible pumps, which are complex to install, difficult to maintain, and expensive, or to purchase large, fixed-structure, and expensive dedicated horizontal centrifugal pumps with built-in priming devices. This not only significantly increases equipment investment and maintenance costs, but its inherent installation limitations also make it difficult to flexibly adapt to the complex and ever-changing spatial layout and process requirements of chemical plant areas, becoming a bottleneck problem that urgently needs to be solved, restricting production efficiency and equipment selection flexibility. Utility Model Content

[0004] To address the technical problem that existing horizontal centrifugal pumps are unable to cope with common low liquid level conditions, thus restricting production efficiency and equipment selection flexibility, this utility model provides a horizontal centrifugal pump priming device and system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] In a first aspect, this utility model provides a liquid priming device for a horizontal centrifugal pump, used between a horizontal centrifugal pump and a storage tank. The liquid priming device for the horizontal centrifugal pump includes: a vacuum priming tank, an inlet pipe, and an outlet pipe.

[0007] The vacuum priming tank is positioned above the horizontal centrifugal pump and the storage tank, and the volume of the vacuum priming tank is smaller than the volume of the horizontal centrifugal pump.

[0008] One end of the inlet pipe is detachably connected to the vacuum liquid priming tank, and the other end extends into the liquid storage tank;

[0009] The two ends of the outlet pipe are detachably connected to the vacuum priming tank and the inlet of the horizontal centrifugal pump, and the outlet pipe is lower than the inlet pipe on the vacuum priming tank.

[0010] Furthermore, the vacuum liquid priming tank is also equipped with a liquid injection valve.

[0011] Optionally, the outlet pipe is in multiple sections, which are connected to each other by flanges, and the outlet pipes at both ends are connected to the vacuum priming tank and the inlet of the horizontal centrifugal pump through flanges.

[0012] Optionally, the vacuum liquid priming tank is provided with a drain valve, which is located at the bottom of the vacuum liquid priming tank.

[0013] Optionally, the vacuum liquid priming tank is provided with reinforcing ribs and a support ring;

[0014] There are multiple reinforcing ribs and multiple supporting rings;

[0015] Multiple reinforcing ribs are evenly arranged on the outer wall of the vacuum liquid priming tank;

[0016] Multiple support rings are evenly arranged on the inner wall of the vacuum liquid priming tank.

[0017] Optionally, the horizontal centrifugal pump priming device further includes a base and a support;

[0018] The support is mounted on the base and supports the vacuum liquid collection tank.

[0019] Optionally, the support member is a lifting device.

[0020] Optionally, a filter element is provided between the outlet pipe and the inlet of the horizontal centrifugal pump.

[0021] Secondly, this utility model provides a horizontal centrifugal pump priming system, including a horizontal centrifugal pump, a storage tank, and a horizontal centrifugal pump priming device of any of the above-mentioned types.

[0022] The liquid priming device of the horizontal centrifugal pump is connected to the liquid inlet of the horizontal centrifugal pump and the liquid storage tank.

[0023] The beneficial effects of this utility model are:

[0024] This invention provides a liquid priming device for a horizontal centrifugal pump. By setting up a vacuum priming tank higher than the horizontal centrifugal pump and the storage tank, and limiting its volume to be smaller than that of the horizontal centrifugal pump, the device creates a high-level liquid seal environment after the initial liquid injection valve. When the horizontal centrifugal pump starts, the negative pressure in the pump chamber is transmitted to the top space of the vacuum priming tank through the outlet pipe, creating a vacuum effect inside the tank. Under atmospheric pressure, the liquid in the storage tank is drawn into the vacuum priming tank through the inlet pipe, realizing active priming of the low-level storage tank. The inlet and outlet pipes are detachably connected, allowing for adjustment of the device's installation position according to the actual installation space of the horizontal centrifugal pump, providing greater flexibility. The design of the outlet pipe's interface on the vacuum priming tank being lower than the inlet pipe ensures that the liquid naturally settles after entering the tank and is stably transported from the bottom to the horizontal centrifugal pump inlet, eliminating the impact of gas-liquid mixing on the pump body. This invention can be used with existing conventional horizontal centrifugal pumps, solving the technical problem that existing horizontal centrifugal pumps are unable to cope with common low liquid level conditions, thus restricting production efficiency and equipment selection flexibility. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the liquid priming device of the horizontal centrifugal pump in this utility model;

[0026] Figure 2 This is a schematic diagram of the liquid outlet pipe of the horizontal centrifugal pump priming device in this utility model when it has multiple sections;

[0027] Figure 3 This is a schematic diagram of the base and support components of the priming device for the horizontal centrifugal pump in this utility model.

[0028] The components include: 1. Horizontal centrifugal pump; 11. Liquid inlet; 2. Liquid storage tank; 3. Vacuum priming tank; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Liquid injection valve; 61. Priming pump; 7. Liquid discharge valve; 8. Base; 9. Support components. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0032] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0033] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0035] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] Firstly, see [the following] Figure 1 and Figure 2 The diagram shows a schematic of a priming device for a horizontal centrifugal pump according to the present invention. This priming device is used between a horizontal centrifugal pump 1 and a storage tank 2. The priming device includes a vacuum priming tank 3, an inlet pipe 4, and an outlet pipe 5. The vacuum priming tank 3 is positioned higher than the horizontal centrifugal pump 1 and the storage tank 2, and its volume is smaller than that of the horizontal centrifugal pump 1. One end of the inlet pipe 4 is detachably connected to the vacuum priming tank 3, and the other end extends into the storage tank 2. Both ends of the outlet pipe 5 are detachably connected to the inlet 11 of the horizontal centrifugal pump 1 and the vacuum priming tank 3, with the outlet pipe 5 positioned lower than the inlet pipe 4. An injection valve 6 is also provided on the vacuum priming tank 3.

[0037] In this embodiment, a priming device for a horizontal centrifugal pump is provided. By setting a vacuum priming tank 3 higher than the horizontal centrifugal pump 1 and the storage tank 2 and limiting its volume to be smaller than that of the horizontal centrifugal pump 1, the device forms a high-level liquid seal environment after the initial injection of liquid through the injection valve 6. When the horizontal centrifugal pump 1 starts, the negative pressure of the pump chamber is transmitted to the top space of the vacuum priming tank 3 through the outlet pipe 5, forming a vacuum effect inside the tank. Under atmospheric pressure, the liquid in the storage tank 2 is drawn into the vacuum priming tank 3 through the inlet pipe 4, realizing the active priming of the low-level storage tank 2. The inlet pipe 4 and the outlet pipe 5 are detachably connected, and the specific installation position of the device can be adjusted according to the installation space of the horizontal centrifugal pump 1 in actual use, which has greater flexibility. The interface position of the outlet pipe 5 on the vacuum priming tank 3 is lower than that of the inlet pipe 4, ensuring that the liquid settles naturally after entering the tank and is stably transported from the bottom to the inlet 11 of the horizontal centrifugal pump 1, eliminating the impact of gas-liquid mixing flow on the pump body. This invention can be used in existing conventional horizontal centrifugal pumps 1, solving the technical problem that existing horizontal centrifugal pumps 1 are unable to cope with common low liquid level conditions, thus restricting production efficiency and equipment selection flexibility.

[0038] Furthermore, the inlet pipe 4 and outlet pipe 5 of this utility model are connected to the vacuum priming tank 3 and the inlet 11 of the horizontal centrifugal pump 1 in a detachable manner, which greatly simplifies the pipeline replacement process caused by medium crystallization or corrosion in chemical sites, avoids overall disassembly, and can be replaced and repaired by removing the inlet pipe 4 or outlet pipe 5 when a fault occurs.

[0039] Furthermore, the vacuum liquid priming tank 3 in this invention has a volume smaller than that of the horizontal centrifugal pump 1, which satisfies the minimum liquid seal requirement and avoids negative pressure response lag.

[0040] Furthermore, the liquid injection valve 6 in this utility model is installed on the vacuum liquid priming tank 3 so that liquid can be injected into the vacuum liquid priming tank 3 through the liquid injection valve 6 before the device is started. After the liquid is full, the liquid injection valve 6 is closed to ensure that there is no residual air cavity in the vacuum liquid priming tank 3. This provides a structural basis for establishing a high-purity negative pressure environment when the horizontal centrifugal pump 1 is started, and directly improves the liquid priming response speed.

[0041] Furthermore, refer to Figure 3 Alternatively, the injection valve 6 can be set at the bottom of the vacuum priming tank 3 and connected to the storage tank 2 through the priming pump 61, and the inlet pipe 4 can be set at the top of the vacuum priming tank 3. Before the device is started, the liquid is injected into the vacuum priming tank 3 from bottom to top through the priming pump 61 and the injection valve 6. The original air in the tank is naturally squeezed by the liquid and is preferentially discharged from the top inlet pipe 4 into the storage tank 2 and then into the atmosphere (no additional exhaust device is required). At the same time, the problem of insufficient vacuum caused by residual air in the vacuum priming tank 3 is avoided.

[0042] Optionally, refer to Figure 2In this utility model, the liquid outlet pipe 5 is multi-segmented, and the multi-segment liquid outlet pipe 5 is connected to each other by flanges. The liquid outlet pipes 5 at both ends are connected to the vacuum liquid tank 3 and the liquid inlet 11 of the horizontal centrifugal pump 1 through flanges.

[0043] In this embodiment, the multi-segment outlet pipe 5, through its modular design with flange connections, enables the pipeline system to be maintained in sections. When conveying chemical media containing solid particles or easily crystallizing chemicals, local blockages only require disassembling the corresponding flange and replacing the pipe segment, eliminating the need for complete dismantling and significantly reducing downtime and maintenance costs. The rigid sealing structure of the flange connection can stably withstand vacuum negative pressure conditions, avoiding potential airtightness failures of flexible connections under negative pressure. The segmented design also gives the outlet pipe 5 a strong adaptability to layout: by adjusting the pipe segment length or flange angle, it can flexibly avoid obstacles in chemical plant areas or adapt to narrow pipe gallery spaces, making it particularly suitable for renovation projects of old workshops. At the same time, the standardized flange interface is compatible with pipe segments of different materials (such as corrosion-resistant alloy pipe segments), facilitating customized material selection based on the characteristics of the chemical media.

[0044] Optionally, refer to Figure 2 The vacuum liquid priming tank 3 of this utility model is equipped with a drain valve 7, which is located at the bottom of the vacuum liquid priming tank 3.

[0045] In this embodiment, the configuration of the drain valve 7 at the bottom of the vacuum liquid tank 3 enables the active removal of sediments inside the tank and the system emptying function. When conveying chemical media containing impurities or easily precipitated substances, the heavier particles that accumulate at the bottom of the tank can be discharged by opening the drain valve 7, avoiding the sediments from affecting the stability of the vacuum or contaminating the conveyed medium. In particular, when the device is shut down for a long time, emptying the liquid inside the tank can prevent the residual medium from evaporating and corroding the tank wall or freezing and damaging the equipment in a low-temperature environment. The drain valve 7 can also be used as a system debugging tool: by controlling the opening of the drain valve 7, the initial liquid level in the tank can be precisely adjusted to optimize the vacuum establishment efficiency. The drain valve 7 and the injection valve 6 work together to form a dual-channel liquid level management system, ensuring safe switching between multiple states such as operation, maintenance, and standby.

[0046] Optionally, the vacuum liquid priming tank 3 of this utility model is provided with reinforcing ribs and support rings; there are multiple reinforcing ribs and support rings; multiple reinforcing ribs are evenly arranged on the outer wall of the vacuum liquid priming tank 3; multiple support rings are evenly arranged on the inner wall of the vacuum liquid priming tank 3.

[0047] In this embodiment, the reinforcing ribs uniformly arranged on the outer wall of the vacuum liquid priming tank 3 and the support rings uniformly arranged on the inner wall constitute a composite pressure-resistant system. The reinforcing ribs on the outer wall are arranged in an axial or mesh pattern to improve the radial stiffness of the tank body and resist the pressure deformation of the outer shell caused by the vacuum liquid priming tank 3 being filled with liquid. The support rings on the inner wall inhibit the tank body from collapsing inward through the ring skeleton. During transportation, or when the vacuum liquid priming tank 3 is quickly emptied, or even when an internal vacuum occurs due to some misoperation, the inner wall of the vacuum liquid priming tank 3 is supported to prevent collapse.

[0048] Optionally, refer to Figure 3 The horizontal centrifugal pump priming device of this utility model also includes a base 8 and a support 9; the support 9 is disposed on the base 8 and supports the vacuum priming tank 3.

[0049] In this embodiment, the combination of the base 8 and the support 9 enables the vacuum liquid tank 3 to have an independent support structure, eliminating the risk of interface stress leakage caused by the weight of the tank on the inlet and outlet pipes 5.

[0050] Optionally, the support member 9 in this utility model is a lifting device.

[0051] In this embodiment, the lifting support 9 enables dynamic and precise adjustment of the height of the vacuum priming tank 3. By controlling the vertical position of the tank (with millimeter-level adjustment accuracy) through a mechanical or hydraulic lifting mechanism, the siphon pressure difference can be optimized for chemical media of varying viscosities (such as high-viscosity polymer solutions). Automated lifting avoids the safety risks of manual elevation operations and is particularly compliant with operating procedures in chemical explosion-proof areas. This design also expands the application scenarios of the device: in the case of fluctuating liquid levels in the storage tank 2, by adjusting the tank height in real time to maintain optimal priming conditions, it solves the failure problem of traditional fixed devices under variable liquid level conditions.

[0052] Furthermore, in this utility model, the support member 9 can be selected as a jack, a hydraulic cylinder, or a telescopic motor.

[0053] Optionally, a filter element is provided between the liquid outlet pipe 5 and the liquid inlet 11 of the horizontal centrifugal pump 1 in this utility model.

[0054] In this embodiment, the filter element installed between the outlet pipe 5 and the inlet 11 of the horizontal centrifugal pump 1 forms a protective barrier in front of the pump, filtering out impurity particles (such as catalyst debris or polymer agglomerates) that may be sucked in during the liquid introduction process. The filter element effectively intercepts and prevents impurities from entering the pump chamber of the horizontal centrifugal pump 1, causing wear or blockage.

[0055] Secondly, this utility model provides a horizontal centrifugal pump priming system, including a horizontal centrifugal pump 1, a storage tank 2, and a horizontal centrifugal pump priming device of any one of the above.

[0056] The liquid priming device of the horizontal centrifugal pump is connected to the liquid inlet 11 of the horizontal centrifugal pump 1 and the liquid storage tank 2.

[0057] In this embodiment, a horizontal centrifugal pump priming system is provided, including a horizontal centrifugal pump 1, a storage tank 2, and a horizontal centrifugal pump priming device of any one of the above. It should be noted that the horizontal centrifugal pump priming device in this system is completely the same as the horizontal centrifugal pump priming device described above, and its usage process and beneficial effects are also the same, so it will not be described in detail here.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A priming device for a horizontal centrifugal pump, used between a horizontal centrifugal pump (1) and a storage tank (2), characterized in that, The horizontal centrifugal pump priming device includes: a vacuum priming tank (3), an inlet pipe (4), and an outlet pipe (5); The vacuum priming tank (3) is positioned higher than the horizontal centrifugal pump (1) and the storage tank (2), and the volume of the vacuum priming tank (3) is smaller than the volume of the horizontal centrifugal pump (1). One end of the inlet pipe (4) is detachably connected to the vacuum liquid priming tank (3), and the other end extends into the liquid storage tank (2); The two ends of the outlet pipe (5) are detachably connected to the vacuum priming tank (3) and the inlet (11) of the horizontal centrifugal pump (1), and the outlet pipe (5) is lower than the inlet pipe (4) on the vacuum priming tank (3). Furthermore, the vacuum liquid priming tank (3) is also equipped with a liquid injection valve (6).

2. The priming device for a horizontal centrifugal pump according to claim 1, characterized in that, The outlet pipe (5) is in multiple sections, and the multiple outlet pipe sections (5) are connected to each other by flanges. The outlet pipes (5) at both ends are connected to the vacuum priming tank (3) and the inlet (11) of the horizontal centrifugal pump (1) through flanges.

3. The priming device for a horizontal centrifugal pump according to claim 1, characterized in that, The vacuum liquid priming tank (3) is equipped with a drain valve (7), which is located at the bottom of the vacuum liquid priming tank (3).

4. The priming device for a horizontal centrifugal pump according to claim 1, characterized in that, The vacuum liquid priming tank (3) is provided with reinforcing ribs and support rings; There are multiple reinforcing ribs and multiple supporting rings; Multiple reinforcing ribs are evenly arranged on the outer wall of the vacuum liquid priming tank (3); Multiple support rings are evenly arranged on the inner wall of the vacuum liquid priming tank (3).

5. The priming device for a horizontal centrifugal pump according to claim 1, characterized in that, The horizontal centrifugal pump priming device also includes a base (8) and a support (9); The support member (9) is disposed on the base (8) and supports the vacuum liquid priming tank (3).

6. The priming device for a horizontal centrifugal pump according to claim 5, characterized in that, The support member (9) is a lifting device.

7. The priming device for a horizontal centrifugal pump according to any one of claims 1 to 6, characterized in that, A filter element is provided between the liquid outlet pipe (5) and the liquid inlet (11) of the horizontal centrifugal pump (1).

8. A horizontal centrifugal pump priming system, characterized in that, It includes a horizontal centrifugal pump (1), a liquid storage tank (2), and a liquid priming device for the horizontal centrifugal pump according to any one of claims 1 to 7; The liquid priming device of the horizontal centrifugal pump is connected to the liquid inlet (11) of the horizontal centrifugal pump (1) and the liquid storage tank (2).

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