A liquid loading manifold

Abstract

The utility model provides a kind of liquid inlet manifold, including main pipeline, liquid inlet pipeline, side branch, main pipeline includes the first end and tail end oppositely arranged in its extension direction, multiple liquid inlet pipelines are arranged along the extension direction of main pipeline and are connected with main pipeline, side branch includes first port, first port is connected with liquid inlet pipeline, first filling plugging member is detachably arranged in first port, to separate side branch and liquid inlet pipeline.The utility model discloses a kind of liquid inlet manifold, first filling plugging member realizes the effect of separating side branch and liquid inlet pipeline, when not needing to discharge, first filling plugging member makes fluid unable to enter side branch, avoid the problem of cyclone and aggravate sand caused by fluid entering side branch, simultaneously also will not affect the normal flow of fluid in main pipeline and liquid inlet pipeline;When needing to discharge, first filling plugging member can be detached, to facilitate by side branch to knock open pump cavity in valve discharge.

Description

Technical Field

[0001] This utility model relates to the field of fracturing equipment technology, and more specifically, to an upper fluid manifold. Background Technology

[0002] The fluid manifold is a crucial piece of equipment in fracturing operations, determining the suction performance of the fracturing pump and affecting its service life. Currently, fracturing operations are complex, and the fluid manifold, during operation, needs to draw in fluids containing various solid impurities. It frequently encounters the following problems: cavitation: While the first few manifolds on the main pipeline can successfully draw fluid, the manifolds at the rear are prone to cavitation due to decreased fluid velocity, leading to air bubbles inside the pipe, causing abnormal noise and wear in the valve chamber; erosion failure: Uneven fluid velocity distribution within the manifold, with higher velocities in some areas, accelerates erosion of the pipe wall, causing localized thinning, especially at weld seams, which are prone to crack initiation, stress concentration, and accelerated fatigue failure; instantaneous fracturing: During fracturing pump operation, the alternating opening and closing of the valve body... The combination of these factors can cause sudden changes in the flow rate and pressure of the liquid in the pipeline, resulting in water hammer pressure, which may lead to cracking and leakage of the welded parts of the pipe fittings. Sand settling occurs because, on the one hand, during the liquid filling process, the fluid velocity in the pipe gradually decreases due to the suction of the cylinder and fluid loss along the flow path. The solid particles carried by the fluid are easy to settle at the bottom of the manifold, which will cause serious sand blockage over time. On the other hand, during on-site operations, stopping the pump will cause the residual fluid velocity in the pipe to drop to zero. Subsequently, the solid particles carried by the fluid will settle. Moreover, the pump stops frequently, once every few hours, which inevitably leads to the accumulation of solid particles in the manifold, affecting the performance and lifespan of the manifold.

[0003] In order to open the valve in the pump chamber and release liquid, the upper liquid manifold in the existing technology is equipped with a side branch pipe. However, the presence of the side branch pipe has a certain impact on the flow field in the upper liquid manifold, resulting in obvious swirling flow. This will aggravate the sand settling phenomenon and make it difficult to clean the sand. Utility Model Content

[0004] The main purpose of this utility model is to provide a liquid supply manifold to solve the technical problems of existing liquid supply manifolds where swirling flow causes sand settling and makes sand cleaning inconvenient.

[0005] To achieve the above objectives, this utility model provides a liquid supply manifold, including a main pipe, a liquid supply pipe, and side branch pipes. The main pipe includes a head end and a tail end that are arranged opposite each other in its extension direction. A plurality of liquid supply pipes are arranged along the extension direction of the main pipe and connected to the main pipe. The side branch pipe includes a first port that is connected to the liquid supply pipe. A first filling and sealing element is detachably provided in the first port to separate the side branch pipe and the liquid supply pipe.

[0006] Furthermore, it also includes a first port sealing component, and the side branch pipe also includes a second port, on which the first port sealing component is installed.

[0007] Furthermore, the inner wall of the first port is provided with a first step to abut against the first filling and sealing member.

[0008] Furthermore, it also includes a sand-cleaning tailpipe and a second port sealing component. The sand-cleaning tailpipe includes a third port and a fourth port. The third port is connected to the main pipeline at the tail end, and the second port sealing component is installed at the fourth port.

[0009] Furthermore, a second filling and sealing component is detachably provided in the third port to separate the main pipe and the sand-cleaning tailpipe.

[0010] Furthermore, the second filling and sealing member is provided with a flow guiding surface, which extends from the tail end to the liquid inlet pipe closest to the tail end.

[0011] Furthermore, the second port sealing component includes a plug and a clamp, wherein the plug is installed on the fourth port by means of the clamp; the second filling sealing component is connected to the plug.

[0012] Furthermore, the main pipeline includes a first pipe section, a second pipe section, and a third pipe section connected sequentially from the first end to the last end. Each of the first, second, and third pipe sections is a circular pipe, and the upper side of their cross-sections is tangent to the same plane. The axis of the first pipe section is horizontal, and the flow area of ​​each part of the first pipe section remains constant. The flow area of ​​the second pipe section gradually decreases from the first end to the last end. The axis of the third pipe section is horizontal, and the flow area of ​​each part of the third pipe section remains constant. The flow area of ​​the third pipe section is equal to the flow area of ​​the liquid-filling pipe closest to the last end. The first, second, and third pipe sections are smoothly connected.

[0013] Furthermore, the wall thickness of the main pipeline gradually increases from the first end to the last end.

[0014] Furthermore, the lower sidewall of the sand-cleaning tailpipe is smoothly connected to the lower sidewall of the main pipe near the tail end.

[0015] The fluid supply manifold of this invention is connected to the fluid supply pipeline via a main pipeline. Fluid enters the main pipeline and flows from its beginning to its end, supplying fluid to the fracturing pump through multiple fluid supply pipes arranged along the extension direction of the main pipeline. The first port of the side branch pipe is connected to the fluid supply pipe, and a first filling and sealing element is detachably installed inside the first port. This first filling and sealing element effectively separates the side branch pipe from the fluid supply pipeline. When fluid release is not required, the first filling and sealing element prevents fluid from entering the side branch pipe, avoiding swirling and aggravated sand settling problems caused by fluid entering the side branch pipe, while also not affecting the normal flow of fluid in the main pipeline and the fluid supply pipeline. When fluid release is required, the first filling and sealing element can be removed, facilitating fluid release by opening the valve in the pump chamber through the side branch pipe. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 One of the schematic diagrams of the liquid supply manifold provided in the embodiment of this utility model;

[0018] Figure 2 A second schematic diagram of the upper liquid manifold provided for an embodiment of this utility model;

[0019] Figure 3 A third schematic diagram of the upper liquid manifold provided for an embodiment of this utility model;

[0020] Figure 4 A fourth schematic diagram of the upper liquid manifold provided for an embodiment of this utility model;

[0021] Figure 5 Fifth schematic diagram of the liquid supply manifold provided for an embodiment of this utility model;

[0022] Figure 6 A schematic diagram of the upper liquid manifold provided for an embodiment of this utility model, number six;

[0023] Figure 7 Schematic diagram seven of the liquid supply manifolds provided for embodiments of this utility model;

[0024] Figure 8 Eighth schematic diagram of the upper liquid manifold provided for an embodiment of this utility model;

[0025] Figure 9 A cross-sectional view of the upper liquid manifold provided in an embodiment of this utility model;

[0026] Figure 10The flow field streamline diagram in the liquid inlet manifold (without the first filling and sealing component and the second filling and sealing component) provided in the embodiment of this utility model.

[0027] The above figures include the following reference numerals:

[0028] 1. Main pipe; 01. First pipe section; 02. Second pipe section; 03. Third pipe section; 2. Liquid supply pipe; 3. Side branch pipe; 31. First port; 311. First filling and sealing component; 3111. Second step; 312. First step; 32. Second port; 4. First port sealing component; 5. Sand removal tail pipe; 51. Third port; 511. Second filling and sealing component; 5111. Guide surface; 52. Fourth port; 521. Positioning groove; 6. Second port sealing component; 61. Plug; 62. Clamp; 7. Flange plate; 71. First reinforcing rib; 72. Discharge port; 73. Sealing groove; 74. Mounting hole; 75. Connection and fixing hole; 751. Connection and fixing component; 8. Liquid inlet connector. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present 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 the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present 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 this application. 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] This utility model provides a liquid supply manifold, including a main pipe 1, a liquid supply pipe 2, and a side branch pipe 3. The main pipe 1 includes a head end and a tail end that are arranged opposite each other in its extension direction. A plurality of liquid supply pipes 2 are arranged along the extension direction of the main pipe 1 and connected to the main pipe 1. The side branch pipe 3 includes a first port 31, which is connected to the liquid supply pipe 2. A first filling and sealing member 311 is detachably provided in the first port 31 to separate the side branch pipe 3 and the liquid supply pipe 2.

[0033] Combination Figure 1 As shown, the three-dimensional structure of the upper fluid manifold is illustrated, combined with... Figure 2 As shown, the beginning and end of the main pipeline 1 are marked relative to each other in its extension direction. Correspondingly, the beginning end of the main pipeline 1 is the liquid inlet end of the main pipeline 1. Typically, a liquid inlet connector 8 is installed at the beginning end of the main pipeline 1. The liquid inlet connector 8 has a connection interface for connecting to the liquid supply pipeline. For example, threads, grooves, and other structures can be machined on the liquid inlet connector 8 to accommodate different sizes and connection methods with the liquid supply pipeline. The liquid inlet connector 8 can adopt structures such as clamp joints, threaded union joints, or welded joints. Combined with... Figure 2 As shown, multiple fluid supply pipes 2 are arranged along the extension direction of the main pipe 1 (i.e., the spacing direction of two adjacent fluid supply pipes 2 is consistent with the extension direction of the main pipe 1). After the fluid enters the main pipe 1 from the head end, it flows to the tail end. The fluid in the main pipe 1 enters the corresponding fluid supply pipe 2 to supply fluid to the fracturing pump.

[0034] Combination Figure 1 and Figure 2As shown, the fluid supply manifold in this embodiment includes five fluid supply pipes 2, corresponding to cylinders 1, 2, 3, 4, and 5 of the fracturing pump from tail to head. Each fluid supply pipe 2 is connected to a side branch pipe 3, which is connected to the fluid supply pipe 2 through its first port 31. Fluid can be released by opening the valve in the pump chamber through the side branch pipe 3. Figure 10 The diagram shows the flow field distribution in the upper fluid manifold without the first filling and sealing component 311 when the lower valves of cylinders 2 and 4 of the fracturing pump are open and the lower valves of cylinders 1, 3 and 5 are closed at a certain moment. It can be seen that the fluid will enter the side branch pipe 3 to form a swirling flow, which will increase the probability of sand and gravel deposition, aggravate the sand settling phenomenon, increase the difficulty and cost of cleaning, and thus lead to low sand cleaning efficiency.

[0035] Combination Figure 5 , Figure 6 As shown, to solve the above problems, a first filling and sealing member 311 is detachably installed in the first port 31 of the side branch pipe 3. The first filling and sealing member 311 can be made of materials such as metal or rubber as needed, as long as it can separate the side branch pipe 3 and the liquid supply pipe 2. Its shape can also be designed as needed, as long as it can provide sufficient isolation and sealing effect. In this embodiment, a rod-shaped first filling and sealing member 311 is used. The inner diameter of the first port 31 of the side branch pipe 3 matches the outer diameter of one end of the first filling and sealing member 311, so that they can be inserted and fitted together, thereby playing a separation role. This can prevent fluid from entering the side branch pipe 3, and at the same time, it will not affect the normal flow of fluid in the main pipe 1 and the liquid supply pipe 2. When liquid needs to be released, the first filling and sealing component 311 can be detached (that is, the first filling and sealing component 311 is inserted into the inner cavity of the side branch pipe 3 to achieve a detachable connection), which makes it easier to open the pump chamber valve. The first filling and sealing component 311 can be connected to the first port 31 through any other detachable connection method, which is only an example here.

[0036] Preferably, the shape of the first filling and sealing member 311 matches the inner cavity shape of the side branch pipe 3. For example, if the side branch pipe 3 is a round pipe, the first filling and sealing member 311 is cylindrical (rod-shaped), which can better fill the inner cavity of the side branch pipe 3 and achieve better sealing performance.

[0037] The fluid supply manifold in this invention is connected to the fluid supply pipeline via the main pipeline 1. After entering the main pipeline 1, the fluid flows from the beginning to the end of the main pipeline 1, and supplies fluid to the fracturing pump through multiple fluid supply pipes 2 arranged in the extension direction of the main pipeline 1. The first port 31 of the side branch pipe 3 is connected to the fluid supply pipe 2. A first filling and sealing member 311 is detachably installed in the first port 31, which separates the side branch pipe 3 from the fluid supply pipe 2. When fluid release is not required, the first filling and sealing member 311 prevents fluid from entering the side branch pipe 3, avoiding the swirling flow caused by fluid entering the side branch pipe 3 and aggravating the problem of sand settling. At the same time, it does not affect the normal flow of fluid in the main pipeline 1 and the fluid supply pipe 2. When fluid release is required, the first filling and sealing member 311 can be removed, making it easy to release fluid by opening the valve in the pump chamber through the side branch pipe 3.

[0038] In one embodiment, the main pipe 1, the liquid supply pipe 2, and the side branch pipe 3 are connected in an integral manner. For example, the liquid supply manifold, including the main pipe 1, the liquid supply pipe 2, and the side branch pipe 3, is manufactured using an integral casting process.

[0039] This design offers better reliability compared to traditional welding or threaded connections, reduces the risk of leakage at pipe joints, and the integrated structure facilitates the creation of smoother, more complex pipe wall surfaces, which in turn promotes a more stable flow field within the pipe.

[0040] Furthermore, combined Figure 5 and Figure 6 As shown, it also includes a first port sealing component 4, combined with Figure 2 As shown, the side branch pipe 3 also includes a second port 32, and the first port sealing member 4 is installed on the second port 32.

[0041] For example, combined Figure 5 and Figure 6 As shown, the first port sealing element 4 uses a union assembly. When liquid needs to be drained, the union assembly can be opened to remove the first filling sealing element 311, facilitating the opening of the valve in the pump chamber for liquid drainage. When liquid drainage is not required, the first filling sealing element 311 can be detachably installed inside the first port 31. Closing the union assembly can provide a certain degree of limitation for the first filling sealing element 311 and ensure the sealing performance at the second port 32. The first port sealing element 4 can also use other structures that can achieve a seal at the second port 32, such as a screw plug; this is not limited here.

[0042] Preferably, the inner wall of the first port 31 is provided with a first step 312 to abut against the first filling and sealing member 311.

[0043] Combination Figure 6As shown, the inner wall of the first port 31 of the side branch pipe 3 is provided with a first step 312, which can be integrally formed by casting. The first filling and sealing member 311 is correspondingly provided with a second step 3111. The first step 312 and the second step 3111 abut against each other, thereby limiting the first filling and sealing member 311. Furthermore, when the first port sealing member 4 is provided, the first port sealing member 4 and the first step 312 limit the first port sealing member 4 from both sides, which can achieve a better limiting effect and help to achieve better sealing performance.

[0044] Furthermore, it also includes a sand-cleaning tailpipe 5 and a second port sealing component 6. The sand-cleaning tailpipe 5 includes a third port 51 and a fourth port 52. The third port 51 is connected to the main pipe 1 at the tail end, and the second port sealing component 6 is installed at the fourth port 52.

[0045] Combination Figure 1 and Figure 2 As shown, the tail end of the main pipe 1 is connected to the third port 51 of the sand-cleaning tail pipe 5. The sand-cleaning tail pipe 5 is provided with a sand-cleaning port (i.e., the fourth port 52) ​​for tools to be inserted for sand-cleaning work. The second port sealing member 6 is installed on the fourth port 52 of the sand-cleaning tail pipe 5. Exemplarily, the second port sealing member 6 includes a plug 61 and a clamp 62. The plug 61 is installed to the fourth port 52 by the clamp 62 to achieve a relatively tight seal.

[0046] Combination Figure 10 The diagram shows the flow field distribution in the upper fluid manifold without the second filling and sealing component 511 when the lower valves of cylinders 2 and 4 of the fracturing pump are open and the lower valves of cylinders 1, 3 and 5 are closed at a certain moment. It can be seen that the fluid will enter the sand removal tailpipe 5 and form a swirling flow, which will increase the probability of sand and gravel deposition, aggravate the sand settling phenomenon, increase the difficulty and cost of cleaning, and thus lead to low sand removal efficiency.

[0047] Combination Figures 1 to 8 As shown, it also includes a flange plate 7, to which each of the liquid supply pipes 2 is connected. Preferably, the main pipe 1, the liquid supply pipe 2, the side branch pipe 3, and the flange plate 7 are all integrally connected; furthermore, a first reinforcing rib 71 is integrally connected between the flange plate 7 and the liquid supply pipe 2, and the first reinforcing rib 71 is integrally connected to the main pipe 1, thereby improving the overall strength of the liquid supply manifold structure. The first reinforcing rib 71 and the flange plate 7 form an angle of 30° to 60°; the upper side wall of the side branch pipe 3 is connected to the flange plate 7 through a rounded transition, and the side branch pipe 3 and the flange plate 7 form an angle of 10° to 30°. The lower side wall of the side branch pipe 3 forms an angle of 1° to 2° with the horizontal plane to improve casting processability.

[0048] Combination Figures 2 to 5As shown, the flange plate 7 is provided with a discharge port 72 for communication with the liquid supply pipe 2. The flange plate 7 is also provided with a sealing groove 73 and a mounting hole 74. The sealing groove 73 is used to install a sealing element, and the mounting hole 74 is used to install a connecting element such as a bolt. Optionally, the flange plate 7 is provided with a connection fixing hole 75. The connection fixing element 751 is installed in the connection fixing hole 75 and is used to fix the chain of the union assembly (i.e., the first port sealing element 4 adopts a union assembly, which includes a union end cap, a union interface and a chain connected to the end cap) to prevent the union end cap from being lost.

[0049] Preferably, a second filling and sealing component 511 is detachably provided in the third port 51 to separate the main pipe 1 and the sand-cleaning tailpipe 5.

[0050] Combination Figure 9 As shown, a second filling and sealing element 511 is detachably installed in the third port 51 of the sand-cleaning tailpipe 5. The second filling and sealing element 511 can be made of materials such as metal or rubber, as long as it effectively separates the main pipe 1 and the sand-cleaning tailpipe 5. Its shape can also be designed to provide sufficient isolation and sealing. The inner diameter of the third port 51 of the sand-cleaning tailpipe 5 matches the outer diameter of one end of the second filling and sealing element 511, allowing for a plug-in connection (i.e., a detachable connection via plugging). This separation prevents fluid from entering the sand-cleaning tailpipe 5 and causing swirling flow, reducing sand settling without affecting the normal flow of fluid in the main pipe 1 and the liquid supply pipe 2.

[0051] Preferably, in this embodiment, the second filling and sealing member 511 is provided with a flow guiding surface 5111, which extends from the tail end to the liquid inlet pipe 2 closest to the tail end.

[0052] Combination Figure 9 As shown, the second filling and sealing component 511 is provided with a guide surface 5111. The guide surface 5111 can be a slanted surface or a curved surface, etc. The tail end of the self-contained pipe 1 extends to the liquid supply pipe 2 closest to the tail end (i.e., the liquid supply pipe 2 on the far right in the figure). Through the guidance of the guide surface 5111, the fluid can enter the liquid supply pipe 2 at the tail end more smoothly, which helps to reduce the flow rate attenuation of the fluid at the tail end, making the liquid suction of the corresponding fracturing pump cylinder at the tail end smoother and reducing the occurrence of air cavitation.

[0053] Preferably, the second filling and sealing element 511 is connected to the plug 61. Figure 9 As shown, in this embodiment, the second filling and sealing member 511 is integrally connected with the plug 61, so that the second filling and sealing member 511 can be pulled out when the plug 61 is opened. It is understood that other non-integral connection methods can also be used, as long as the second filling and sealing member 511 can be pulled out when the plug 61 is opened.

[0054] In this way, by connecting the second filling and sealing element 511 to the plug 61, it is convenient to open the plug 61 and pull out the second filling and sealing element 511 together when cleaning sand, which helps to improve the sand cleaning efficiency.

[0055] In addition, combined Figure 7 As shown, the second filling and sealing member 511 is connected to the plug 61, and the fourth port 52 is provided with a positioning groove 521. Correspondingly, the second port sealing member 6 is provided with a positioning block (not shown in the figure). The positioning block and the positioning groove 521 are connected to each other, so as to facilitate accurate installation of the second port sealing member 6 and ensure that the guide surface 5111 is in the correct direction.

[0056] Further, the main pipeline 1 includes a first pipe section 01, a second pipe section 02, and a third pipe section 03 connected sequentially from the first end to the last end. Each of the three pipe sections is a circular pipe, and the upper side of their cross-sections is tangent to the same plane. The axis of the first pipe section 01 is horizontal, and the flow area of ​​each part of the first pipe section 01 remains constant. The flow area of ​​the second pipe section 02 gradually decreases from the first end to the last end. The axis of the third pipe section 03 is horizontal, and the flow area of ​​each part of the third pipe section 03 remains constant. The flow area of ​​the third pipe section 03 is equal to the flow area of ​​the liquid-filling pipeline 2 closest to the last end. The first pipe section 01, the second pipe section 02, and the third pipe section 03 are smoothly connected.

[0057] Combination Figure 9As shown, the first pipe section 01, the second pipe section 02, and the third pipe section 03 are all circular pipes, and the upper side of their cross-sections is tangent to the same plane (the dotted line in the figure represents this "plane"). The first pipe section 01 of the main pipe 1 is designed with a constant flow area and a horizontal structure. This is because the fluid velocity near the inlet end (the beginning end) is stable, so the corresponding upper pipe 2 will basically not experience cavitation. Using a horizontal pipe structure with a constant flow area can reduce production and processing costs. The second pipe section 02 is designed with a gradually decreasing flow area (since the upper side of the cross-sections of the circular pipes in each part of the main pipe 1 is tangent to the same horizontal plane, the bottom wall of the second pipe section 02 needs to gradually shrink upwards from the beginning end to the end to achieve the change in flow area). This is because the closer to the end... The liquid suction capacity of the liquid inlet pipe 2 at the end gradually weakens. Through the variable diameter design with a gradually decreasing flow area, the fluid velocity gradually increases, thereby meeting the liquid suction requirements of the corresponding liquid inlet pipe 2. The third pipe section 03 of the main pipe 1 is set as a structure with a constant flow area and a horizontal setting, so as to connect with the sand cleaning tail pipe 5 at the tail end. To a certain extent, the sand cleaning tail pipe 5 can be designed to be shorter, thereby reducing the occurrence of swirling phenomenon here. The first pipe section 01, the second pipe section 02, and the third pipe section 03 are smoothly connected. For example, the main pipe 1 is formed by the integral connection of the first pipe section 01, the second pipe section 02, and the third pipe section 03, so that the inner wall of the main pipe 1 is smooth as a whole, avoiding the problem of pipe cracking caused by local protrusions on the inner wall (such as weld seams) leading to increased fluid velocity.

[0058] In addition, the third pipe section 03 and the upper liquid pipe 2 closest to the tail end have equal flow areas. This avoids the problem of throttling at the lower valve caused by an insufficiently small upper liquid pipe 2, enhances the fluid's sand-carrying capacity, and reduces the risk of cavitation.

[0059] In the above embodiments, the wall thickness of the main pipe 1 can be designed as needed, and can be of uniform wall thickness or of variable wall thickness.

[0060] Preferably, the wall thickness of the main pipe 1 gradually increases from the first end to the last end.

[0061] Since the erosion caused by the sand-carrying liquid inside the pipe mainly occurs near the tail end, gradually increasing the pipe wall thickness from the head end to the tail end can, to some extent, prevent the occurrence of erosion.

[0062] Preferably, the lower sidewall of the sand-cleaning tailpipe 5 is smoothly connected to the lower sidewall of the main pipe 1 near the tail end.

[0063] Combination Figure 9As shown, the lower side wall of the sand-cleaning tailpipe 5 is tangent to the lower side wall of the main pipe 1 near the tail end, thus achieving a smooth connection. This allows the sand-cleaning tailpipe 5 to be set as low as possible, avoiding the formation of a step at the connection between the sand-cleaning tailpipe 5 and the main pipe 1. This can prevent erosion caused by the increased local fluid velocity and also provide more space during sand cleaning.

[0064] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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 of each component itself.

[0065] 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.

[0066] 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.

[0067] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A liquid supply manifold, characterized in that, It includes a main pipe (1), a liquid supply pipe (2), and a side branch pipe (3). The main pipe (1) includes a head end and a tail end that are arranged opposite each other in its extension direction. Multiple liquid supply pipes (2) are arranged along the extension direction of the main pipe (1) and connected to the main pipe (1). The side branch pipe (3) includes a first port (31) that is connected to the liquid supply pipe (2). A first filling and sealing element (311) is detachably provided in the first port (31) to separate the side branch pipe (3) and the liquid supply pipe (2).

2. The upper liquid manifold according to claim 1, characterized in that, It also includes a first port plug (4), and the side branch pipe (3) also includes a second port (32), with the first port plug (4) installed at the second port (32).

3. The upper liquid manifold according to claim 1, characterized in that, The inner wall of the first port (31) is provided with a first step (312) to abut against the first filling and sealing member (311).

4. The upper liquid manifold according to claim 1, characterized in that, It also includes a sand-clearing tailpipe (5) and a second port sealing component (6). The sand-clearing tailpipe (5) includes a third port (51) and a fourth port (52). The third port (51) is connected to the main pipe (1) at the tail end, and the second port sealing component (6) is installed at the fourth port (52).

5. The upper liquid manifold according to claim 4, characterized in that, The third port (51) is detachably provided with a second filling and sealing component (511) to separate the main pipe (1) and the sand-clearing tail pipe (5).

6. The upper liquid manifold according to claim 5, characterized in that, The second filling and sealing member (511) is provided with a flow guiding surface (5111), which extends from the tail end to the liquid inlet pipe (2) closest to the tail end.

7. The upper liquid manifold according to claim 5, characterized in that, The second port sealing component (6) includes a plug (61) and a clamp (62), and the plug (61) is installed on the fourth port (52) by the clamp (62); the second filling sealing component (511) is connected to the plug (61).

8. The upper liquid manifold according to claim 1 or 4, characterized in that, The main pipeline (1) includes a first pipe section (01), a second pipe section (02), and a third pipe section (03) connected sequentially from the first end to the last end. The first pipe section (01), the second pipe section (02), and the third pipe section (03) are all circular pipes, and the upper side of their cross-sections is tangent to the same plane. The axis of the first pipe section (01) is horizontally set, and the flow area of ​​each part of the first pipe section (01) remains unchanged. The flow area of ​​the second pipe section (02) gradually decreases from the first end to the last end. The axis of the third pipe section (03) is horizontally set, and the flow area of ​​each part of the third pipe section (03) remains unchanged. The flow area of ​​the third pipe section (03) is equal to the flow area of ​​the liquid supply pipeline (2) closest to the last end. The first pipe section (01), the second pipe section (02), and the third pipe section (03) are smoothly connected.

9. The upper liquid manifold according to claim 1, characterized in that, The wall thickness of the main pipe (1) gradually increases from the first end to the last end.

10. The upper liquid manifold according to claim 4, characterized in that, The lower side wall of the sand-cleaning tail pipe (5) is smoothly connected to the lower side wall of the main pipe (1) near the tail end.

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