Gear pump and working method thereof

Abstract

The invention belongs to the technical field of valves, and particularly relates to a gear pump and a working method thereof.The gear pump comprises a pump body provided with an outflow pipe used for being connected with an equipment inflow pipe; the flow guide funnel is positioned in the flow outlet pipe and is arranged close to a pipe orifice of the flow outlet pipe; a flow inlet and a flow outlet are formed in the two ends of the flow guide funnel respectively, and the inner diameter of the flow inlet is larger than that of the flow outlet; wherein the outflow pipe is horizontally arranged; the flow outlet is located in the pipe opening side of the flow outlet pipe. The flow guide funnel is suitable for gathering the medium in the flow outlet pipe and guiding the gathered medium to be sprayed towards the axis of the equipment flow inlet pipe so as to reduce the impact force of the medium on the end face of the equipment flow inlet pipe; according to the gear pump and the working method thereof, the diversion funnel is arranged in the outflow pipe to gather the medium in the outflow pipe, so that most of the medium directly flows into the inflow pipe of the equipment, and the force borne by the end face of the inflow pipe of the equipment is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and specifically relates to a metering device, and in particular to a gear pump and a working method thereof. Background Art

[0002] The outlet pipe of the gear pump needs to be connected to the inlet pipe of the equipment to transport the medium to the equipment.

[0003] In order to reduce the impact force, the inlet pipe of the equipment is generally set horizontally, so the outlet pipe of the gear pump also needs to be set horizontally for connection; at the same time, the connection of the gear pump generally adopts internal threads to provide the pump body with sufficient wall thickness to withstand high pressure and mechanical stress.

[0004] However, after the pipeline is threaded, the inner walls of the connection will not be in the same plane, causing the impact force of the medium in the outlet pipe to act on the end face of the inlet pipe. After the inlet pipe is under stress for a long time, it is easy to cause the pipeline to loosen.

[0005] Therefore, how to solve the technical problem that when the outlet pipe is arranged horizontally, the conveyed medium easily impacts the inlet pipe and causes it to loosen is urgently needed to be solved by those skilled in the art.

[0006] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the Invention

[0007] The embodiments of the present disclosure provide at least one gear pump and a working method thereof.

[0008] In the first aspect, an embodiment of the present disclosure provides a gear pump, comprising: a pump body, on which an outlet pipe for connecting to an equipment inlet pipe is provided; a diversion funnel, located in the outlet pipe and arranged near the pipe mouth of the outlet pipe; the two ends of the diversion funnel are respectively an inlet and an outlet, and the inner diameter of the inlet is larger than the inner diameter of the outlet; wherein the outlet pipe is arranged horizontally; the outlet is located on the pipe mouth side of the outlet pipe; the diversion funnel is suitable for gathering the medium in the outlet pipe and guiding the gathered medium to be sprayed toward the axis of the equipment inlet pipe, so as to reduce the impact force of the medium on the end face of the equipment inlet pipe.

[0009] In an optional embodiment, the outlet pipe includes: a first flow channel section and a second flow channel section; an annular mounting groove is provided on the end surface of the first flow channel section facing the second flow channel section, and an elastic piston assembly is arranged in the annular mounting groove; wherein the outlet of the diversion funnel is connected to the elastic piston assembly; a suction hole group is provided on the inner wall of the annular mounting groove located below; when the valve is opened, the diversion funnel is forced to squeeze the elastic piston assembly; after the valve is closed, the elastic piston assembly resets and moves to create negative pressure in the annular mounting groove, and absorbs the residual medium in the first flow channel section through the suction hole group.

[0010] In an optional embodiment, the elastic piston assembly includes: a sleeve and a spring group; one end of the sleeve is slidably arranged in an annular mounting groove; the spring group is arranged in the annular mounting groove and connected to the sleeve; when the valve is opened, the diversion funnel is forced to push the sleeve to squeeze the spring group; after the valve is closed, the spring group drives the sleeve to reset and move to create negative pressure in the annular mounting groove.

[0011] In an optional embodiment, a mounting ring is provided at the other end of the sliding sleeve, and the outlet of the guide funnel is connected to the mounting ring; wherein the inner diameter of the mounting ring is smaller than the inner diameter of the first flow channel section; the inner diameter of the mounting ring is the same as the inner diameter of the outlet; when the valve is opened, the pressure in the first flow channel section is smaller than the pressure in the annular mounting groove, and impurities accumulated in the annular mounting groove are absorbed by negative pressure.

[0012] In an optional embodiment, the inner diameter of the outlet is smaller than the inner diameter of the equipment inlet pipe.

[0013] In an optional embodiment, the diversion funnel is made of an elastic diaphragm, one end of which is connected to the inner wall of the second flow channel section, and the other end is connected to the mounting ring; after closing the valve, the spring group pushes the mounting ring to make the outlet and inlet of the diversion funnel close to each other.

[0014] In an optional embodiment, the side wall of the diversion funnel is evenly provided with a plurality of avoidance gaps along the axial direction; when the valve is opened, the mounting ring is pressurized to compress the spring group, and a recoil zone is formed between the inlet and the mounting ring to reduce the flow rate of the medium.

[0015] In a second aspect, an embodiment of the present disclosure also provides a working method of a gear pump, including: the outlet pipe of the pump body is horizontally arranged and connected to the inlet pipe of the equipment; the medium in the outlet pipe is gathered by a diversion funnel in the outlet pipe, and the gathered medium is guided to be sprayed toward the axis of the inlet pipe of the equipment to reduce the impact force of the medium on the inlet pipe of the equipment.

[0016] In an optional embodiment, when the valve is opened, the medium impacts the diversion funnel to squeeze the elastic piston assembly; after the valve is closed, the elastic piston assembly is reset to cause the annular mounting groove to absorb the residual medium in the first flow channel section through the negative pressure of the suction hole group.

[0017] In an optional embodiment, when the valve is opened, the first flow channel section absorbs impurities accumulated in the annular mounting groove through negative pressure.

[0018] The beneficial effects of the present invention are that the gear pump and its working method are such that a diversion funnel is provided in the outlet pipe to gather the medium in the outlet pipe, thereby allowing most of the medium to flow directly into the equipment inlet pipe, thereby reducing the force exerted on the end face of the equipment inlet pipe; at the same time, negative pressure is created in the annular mounting groove by the resetting movement of the elastic piston assembly, thereby sucking away the residual medium in the outlet pipe, thereby preventing the medium from corroding the connection between the outlet pipe and the equipment inlet pipe; and, the flow of the medium in the first flow channel section is accelerated to increase the negative pressure in the first flow channel section, thereby sucking out impurities accumulated in the annular mounting groove, thereby preventing the accumulation of impurities and causing blockage of the annular mounting groove.

[0019] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited herein and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic structural diagram of a gear pump provided in an embodiment of the present disclosure; Figure 2 A schematic diagram of a partial cross-sectional structure of a gear pump provided in an embodiment of the present disclosure; Figure 3 A schematic cross-sectional view of a diversion funnel provided in an embodiment of the present disclosure.

[0023] In the picture: Pump body 1; Outlet pipe 2, first flow channel section 21, annular mounting groove 211, liquid hole 212, second flow channel section 22; Diversion funnel 3, inlet 31, avoidance gap 311, recoil zone 312, outlet 32; Elastic piston assembly 4, sliding sleeve 41, spring assembly 42, mounting ring 43; Equipment inlet pipe 5. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] In the related art, the equipment inlet pipe 5 is screwed into the outlet pipe 2, that is, the end face of the equipment inlet pipe 5 is located inside the outlet pipe 2; since the outlet pipe 2 is arranged horizontally, the medium (corrosive) in the outlet pipe 2 will impact the end face of the equipment inlet pipe 5 when entering the equipment inlet pipe 5, causing the equipment inlet pipe 5 to vibrate and become loose.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, in the drawings, the thickness of components may be exaggerated or reduced in order to effectively describe the technical content.

[0027] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0028] like Figures 1 to 3 As shown, at least one embodiment provides a gear pump, comprising: a pump body 1, on which is provided an outlet pipe 2 for connecting to an equipment inlet pipe 5; a guide funnel 3, located in the outlet pipe 2 and arranged near the pipe mouth of the outlet pipe 2; the two ends of the guide funnel 3 are an inlet 31 and an outlet 32 ​​respectively, and the inner diameter of the inlet 31 is larger than the inner diameter of the outlet 32; wherein the outlet pipe 2 is arranged horizontally; the outlet 32 ​​is located on the pipe mouth side of the outlet pipe 2; the guide funnel 3 is suitable for gathering the medium in the outlet pipe 2 and guiding the gathered medium to be sprayed toward the axis of the equipment inlet pipe 5, so as to reduce the impact force of the medium on the end face of the equipment inlet pipe 5.

[0029] In this embodiment, a diversion funnel 3 is provided in the outlet pipe 2 to gather the medium in the outlet pipe 2 so that most of the medium flows directly into the equipment inlet pipe 5, thereby reducing the force on the end face of the equipment inlet pipe 5.

[0030] In some embodiments, as Figure 3 As shown, the outlet pipe 2 includes: a first flow channel section 21 and a second flow channel section 22, the inner diameter of the first flow channel section 21 is smaller than the inner diameter of the second flow channel section 22; an annular mounting groove 211 is provided on the end surface of the first flow channel section 21 facing the second flow channel section 22, and an elastic piston assembly 4 is arranged in the annular mounting groove 211.

[0031] Specifically, the outlet 32 ​​of the diversion funnel 3 is connected to the elastic piston assembly 4 , and a liquid suction hole group 212 is provided on the inner wall below the annular mounting groove 211 .

[0032] Specifically, when the valve is opened, the guide funnel 3 is forced to squeeze the elastic piston assembly 4; after the valve is closed, the elastic piston assembly 4 returns to its original position to create a negative pressure in the annular mounting groove 211, and absorbs the residual medium in the first flow channel section 21 through the suction hole group 212.

[0033] In this embodiment, after the valve is closed, no medium flows through the diversion funnel 3; however, since the outlet pipe 2 is arranged horizontally, medium will remain in the first flow channel section 21, and the residual medium will corrode the connection between the outlet pipe 2 and the equipment inlet pipe 5. Therefore, the resetting movement of the elastic piston assembly 4 creates a negative pressure in the annular mounting groove 211, thereby sucking away the residual medium in the outlet pipe 2 to prevent the medium from corroding the connection between the outlet pipe 2 and the equipment inlet pipe 5.

[0034] In some embodiments, as Figure 3 As shown, the elastic piston assembly 4 includes: a sleeve 41 and a spring group 42; one end of the sleeve 41 is slidably arranged in the annular mounting groove 211; the spring group 42 is arranged in the annular mounting groove 211 and connected to the sleeve 41; when the valve is opened, the guide funnel 3 is forced to push the sleeve 41 to squeeze the spring group 42; after the valve is closed, the spring group 42 drives the sleeve 41 to return to its original position to create a negative pressure in the annular mounting groove 211.

[0035] Specifically, one end of the sliding sleeve 41 is slidably disposed in the annular mounting groove 211 and realizes dynamic sealing, that is, when the sliding sleeve 41 moves away from the annular mounting groove 211 , negative pressure is generated in the annular mounting groove 211 .

[0036] In this embodiment, a spring assembly 42 is used as a power source. When the valve is opened, the impact force of the medium causes the sleeve 41 to be squeezed by the spring assembly 42; after the valve is closed, the spring assembly 42 recovers its deformation and pushes the sleeve 41 outward to create a negative pressure in the annular mounting groove 211.

[0037] In some embodiments, as Figure 3 As shown, a mounting ring 43 is provided at the other end of the sliding sleeve 41, and the outlet 32 ​​of the guide funnel 3 is connected to the mounting ring 43; the inner diameter of the mounting ring 43 is smaller than the inner diameter of the first flow channel section 21; the inner diameter of the mounting ring 43 is the same as the inner diameter of the outlet 32; when the valve is opened, the pressure in the first flow channel section 21 is lower than the pressure in the annular mounting groove 211, and the impurities accumulated in the annular mounting groove 211 are absorbed by the negative pressure.

[0038] In this embodiment, after the valve is closed, the annular mounting groove 211 will absorb the residual medium under negative pressure. There may be impurities in the medium, and these impurities will be deposited in the annular mounting groove 211; when the valve is opened, the medium in the first flow channel section 21 is accelerated to increase the negative pressure in the first flow channel section 21, thereby sucking out the impurities accumulated in the annular mounting groove 211, preventing the accumulation of impurities and causing blockage of the annular mounting groove 211.

[0039] In some embodiments, as Figure 3 As shown, the inner diameter of the outlet 32 ​​is smaller than the inner diameter of the equipment inlet pipe 5, so that the gathered medium is sprayed toward the axis of the equipment inlet pipe 5 to reduce the impact force of the medium on the end face of the equipment inlet pipe 5.

[0040] In some embodiments, as Figure 3 As shown, the diversion funnel 3 is made of an elastic diaphragm, one end of which is connected to the inner wall of the second flow channel section 22, and the other end is connected to the mounting ring 43; after closing the valve, the spring group 42 pushes the mounting ring 43 to make the outlet 32 ​​of the diversion funnel 3 close to the inlet 31.

[0041] In some embodiments, as Figure 3 As shown, the side wall of the guide funnel 3 is uniformly provided with a plurality of avoidance notches 311 along the axial direction; when the valve is opened, the mounting ring 43 is compressed to compress the spring assembly 42 and form a recoil zone 312 between the inlet 31 and the mounting ring 43 to reduce the flow rate of the medium.

[0042] Specifically, when the medium impacts the mounting ring 43 , the medium will flow in the reverse direction to collide with the medium in the normal flow direction, thereby reducing the flow rate of the medium.

[0043] In this embodiment, the flow rate of the medium is reduced in order to reduce the impact force of the medium on the end face of the equipment inlet pipe 5 .

[0044] At least one embodiment provides a working method of a gear pump, including: the outlet pipe 2 of the pump body 1 is horizontally arranged and connected to the equipment inlet pipe 5; the medium in the outlet pipe 2 is gathered by the diversion funnel 3 in the outlet pipe 2, and the gathered medium is guided to be sprayed toward the axis of the equipment inlet pipe 5 to reduce the impact force of the medium on the equipment inlet pipe 5.

[0045] Regarding the specific structure and implementation process of the gear pump, please refer to the relevant discussion in the above embodiments and will not be repeated here.

[0046] In some embodiments, when the valve is opened, the medium impacts the diversion funnel 3 to squeeze the elastic piston assembly 4; after the valve is closed, the elastic piston assembly 4 is reset and moves, so that the annular mounting groove 211 absorbs the residual medium in the first flow channel section 21 through the suction hole group 212 under negative pressure.

[0047] In some embodiments, when the valve is opened, the first flow channel section 21 absorbs impurities accumulated in the annular mounting groove 211 through negative pressure.

[0048] In summary, the gear pump and its working method are configured such that a guide funnel 3 is provided in the outlet pipe 2 to gather the medium in the outlet pipe 2, so that most of the medium flows directly into the equipment inlet pipe 5, thereby reducing the force exerted on the end face of the equipment inlet pipe 5; at the same time, the elastic piston assembly 4 is reset to create a negative pressure in the annular mounting groove 211, thereby sucking away the residual medium in the outlet pipe 2 to prevent the medium from corroding the connection between the outlet pipe 2 and the equipment inlet pipe 5; and, the medium in the first flow channel section 21 is accelerated to flow, thereby increasing the negative pressure in the first flow channel section 21, thereby sucking out impurities accumulated in the annular mounting groove 211, thereby preventing the accumulation of impurities and causing blockage of the annular mounting groove 211.

[0049] Herein, when it is mentioned that a first component is located on a second component, this may mean that the first component may be directly formed on the second component or a third component may be interposed between the first component and the second component.

[0050] As used herein, when an element or layer is referred to as being "located on," "engaged to," "connected to," "attached to," or "coupled to" another element or layer, it may be directly located on, engaged, connected, attached to, or coupled to the other element or layer, or there may be intervening elements or layers. Conversely, when an element is referred to as being "directly on," "directly engaged to," "directly connected to," "directly attached to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0051] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." when following a list of elements modify the entire list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0052] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limiting. As used herein, the singular articles "a", "an" and "the" may also be intended to include plural forms, unless otherwise clearly indicated herein. The terms "comprise", "include" and "have" are inclusive and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the particular order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0053] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects, or designs. Instead, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0054] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0055] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used herein unless expressly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

[0056] Spatially relative terms, such as "inside," "outside," "below," "beneath," "down," "above," "on," etc., may be used herein to describe the relationship of one element or feature to another element or feature as illustrated in the figures. In addition to the orientations depicted in the figures, spatially relative terms may be intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as being "below" or "below" other elements or features will be oriented to be "above" the other elements or features. Thus, the example term "below" may encompass both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0057] In the above discussion, unless otherwise indicated, the terms "about," "approximately," "substantially," etc., when used to describe a numerical value, mean a variation of + / - 10% of the value.

[0058] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A gear pump, characterized in that: include: A pump body (1) is provided with an outlet pipe (2) for connecting to an inlet pipe (5) of a device; A diversion funnel (3) is located inside the outlet pipe (2) and is arranged close to the outlet pipe (2); The two ends of the diversion funnel (3) are respectively an inlet (31) and an outlet (32), and the inner diameter of the inlet (31) is larger than the inner diameter of the outlet (32); The outlet pipe (2) is arranged horizontally; The outlet (32) is located at the outlet side of the outlet pipe (2); The guide funnel (3) is suitable for gathering the medium in the outlet pipe (2) and guiding the gathered medium to be sprayed toward the axis of the equipment inlet pipe (5) to reduce the impact force of the medium on the end face of the equipment inlet pipe (5).

2. The gear pump according to claim 1, wherein The outlet pipe (2) comprises: a first flow channel section (21) and a second flow channel section (22); An annular mounting groove (211) is provided on the end surface of the first flow channel section (21) facing the second flow channel section (22), and an elastic piston assembly (4) is provided in the annular mounting groove (211); wherein The outlet (32) of the diversion funnel (3) is connected to the elastic piston assembly (4); The inner wall of the annular mounting groove (111) is provided with a liquid suction hole group (212); When the valve is opened, the diversion funnel (3) is forced to squeeze the elastic piston assembly (4); After the valve is closed, the elastic piston assembly (4) resets and moves to create negative pressure in the annular mounting groove (211), and absorbs the residual medium in the first flow channel section (21) through the liquid suction hole group (212).

3. The gear pump according to claim 2, wherein: The elastic piston assembly (4) comprises: a sliding sleeve (41) and a spring assembly (42); One end of the sliding sleeve (41) is slidably disposed in the annular mounting groove (211); The spring assembly (42) is arranged in the annular mounting groove (211) and is connected to the sliding sleeve (41); When the valve is opened, the guide funnel (3) is forced to push the sliding sleeve (41) to compress the spring assembly (42); After the valve is closed, the spring assembly (42) drives the sliding sleeve (41) to reset and move so as to create negative pressure in the annular mounting groove (211).

4. The gear pump according to claim 3, wherein The other end of the sliding sleeve (41) is provided with a mounting ring (43), and the outlet (32) of the diversion funnel (3) is connected to the mounting ring (43); wherein The inner diameter of the mounting ring (43) is smaller than the inner diameter of the first flow channel section (21); The inner diameter of the mounting ring (43) is the same as the inner diameter of the outlet (32); When the valve is opened, the pressure in the first flow channel section (21) is lower than the pressure in the annular mounting groove (211), and impurities accumulated in the annular mounting groove (211) are absorbed by the negative pressure.

5. The gear pump according to claim 4, wherein The inner diameter of the outlet (32) is smaller than the inner diameter of the equipment inlet pipe (5).

6. The gear pump according to claim 5, wherein The diversion funnel (3) is made of an elastic diaphragm, one end of which is connected to the inner wall of the second flow channel section (22), and the other end is connected to the mounting ring (43); After the valve is closed, the spring assembly (42) pushes the mounting ring (43) to bring the outlet (32) of the diversion funnel (3) into close proximity with the inlet (31).

7. The gear pump according to claim 6, wherein The side wall of the diversion funnel (3) is evenly provided with a plurality of avoidance notches (311) along the axial direction; When the valve is opened, the mounting ring (43) is pressurized to compress the spring assembly (42), and a backwash zone (312) is formed between the inlet (31) and the mounting ring (43) to reduce the flow rate of the medium.

8. A method for operating a gear pump according to any one of claims 1 to 7, characterized in that: include: The outlet pipe (2) of the pump body (1) is arranged horizontally and is connected to the inlet pipe (5) of the equipment; The medium in the outlet pipe (2) is gathered by the guide funnel (3) in the outlet pipe (2), and the gathered medium is directed to be ejected toward the axis of the equipment inlet pipe (5), so as to reduce the impact force of the medium on the equipment inlet pipe (5).

9. The operating method of the gear pump according to claim 8, characterized in that: When the valve is opened, the medium impacts the diversion funnel (3) to squeeze the elastic piston assembly (4); After the valve is closed, the elastic piston assembly (4) is reset to allow the annular mounting groove (211) to absorb the residual medium in the first flow channel section (21) through the liquid suction hole group (212) under negative pressure.

10. The operating method of the gear pump according to claim 9, characterized in that: When the valve is opened, the first flow channel section (21) absorbs impurities accumulated in the annular mounting groove (211) through negative pressure.

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