Injection pump capable of increasing flow

Abstract

The invention provides an injection pump capable of increasing flow, and relates to the field of injection pumps. The jet pump capable of increasing flow comprises a pump body with a water inlet and a water outlet, a flow channel body structure is arranged in the pump body and comprises a partition wall, a jet flow channel and a flow increasing channel, the jet flow channel and the flow increasing channel are located on the two opposite sides of the partition wall, the jet flow channel is communicated with a water inlet cavity and a pressurizing cavity, and the flow increasing channel is communicated with the water inlet cavity and the jet flow channel. The isolation wall comprises a first section and a second section which are distributed in the extending direction of the jet flow channel, the second section is located on a diffusion section of the jet flow channel, the thickness of the second section is smaller than that of the first section, and a guide-out opening, used for guiding out fluid, of the flow increasing channel is formed in the second section. The performance of the jet pump capable of increasing the flow is further optimized on the basis of increasing the maximum flow speed of the jet pump.

Description

Technical Field

[0001] The present application relates to the field of jet pumps, and in particular to a jet pump capable of increasing flow. Background Art

[0002] A jet pump is a device for conveying liquids, including a motor and a pump body. The pump body is provided with a water inlet, a water inlet chamber, a jet channel, a boost chamber, a water outlet channel and a water outlet. An impeller is provided in the boost chamber. The water inlet is connected to the water inlet chamber, the water inlet chamber is connected to the jet channel, the water outlet is connected to the water outlet channel, and the boost chamber is connected to the jet channel and the water outlet channel respectively. The motor drives the impeller to rotate at high speed, and the external water flows into the boost chamber through the water inlet, the water inlet chamber and the jet channel in turn. After the boosting effect of the impeller, a high-pressure water flow is formed and enters the water outlet channel, and then discharged from the water outlet. As the fluid inside the impeller is continuously discharged, a low-pressure area is gradually formed at the center of the impeller, and even a vacuum is reached. At this time, the fluid at the inlet of the jet pump flows into the impeller through the water inlet under the action of atmospheric pressure, and then is thrown out by the impeller. In this process, the impeller transfers the mechanical energy of the pump shaft to the fluid, which is converted into pressure energy and kinetic energy of the fluid, and is reflected as the head output of the jet pump.

[0003] The performance of the jet pump depends on two working parameters: head and flow rate. The curve relationship between head and flow rate is inversely proportional, that is, the higher the head, the smaller the flow rate; the lower the head, the larger the flow rate. The flow rate of the jet pump is limited by the water inlet channel. Therefore, the existing jet pump increases the maximum achievable flow rate by setting a flow-increasing channel, but the performance is still poor and there is room for optimization. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a flow-increasing jet pump, which can increase the maximum achievable flow rate through structural improvement, avoid the influence of the structure of the flow-increasing channel on the working efficiency of the jet channel, and optimize the performance of the jet pump.

[0005] The embodiment of the present application provides a jet pump capable of increasing flow, which includes a pump body having a water inlet and a water outlet, wherein a water inlet chamber, a pressurizing chamber, and a flow channel structure are arranged in the pump body, wherein the water inlet chamber is connected to the water inlet, and the pressurizing chamber is connected to the water outlet;

[0006] The flow channel body structure includes a partition wall, and a jet channel and a flow-increasing channel located on opposite sides of the partition wall. The two ends of the jet channel are respectively connected to the water inlet chamber and the boosting chamber, and the two ends of the flow-increasing channel are respectively connected to the water inlet chamber and the jet channel.

[0007] The partition wall includes a first section and a second section distributed along the extension direction of the jet channel. The second section is located in the diffusion section of the jet channel. The thickness of the second section is smaller than that of the first section. The outlet of the flow-increasing channel for extracting the fluid is opened in the second section.

[0008] The flow-increasing jet pump provided by the present application, on the one hand, utilizes the flow-increasing channel to guide out the fluid, and the outlet is located in the diffusion section of the jet channel, so that the fluid guided out of the flow-increasing channel merges with the fluid in the flow-increasing channel before entering the pressurization chamber, which is beneficial to improving the reflux efficiency, and the suction range of the jet pump (i.e., the height to which the jet pump draws up the water) is improved, thereby improving the maximum flow rate; on the other hand, since the opposite sides of the partition wall are the jet channel and the flow-increasing channel, respectively, and the partition wall includes a first section and a second section distributed along the extension direction of the jet channel, therefore, by controlling the thickness of the second section to be smaller than that of the first section, The outlet of the flow-increasing channel for discharging the fluid is opened in the second section. On the one hand, it can alleviate or avoid the phenomena of disturbance and turbulence in the process of fluid passing through. On the other hand, it makes the flow direction of the fluid output from the flow-increasing channel almost the same as or similar to that of the fluid in the jet channel after entering the jet channel. It can not only effectively reduce the energy loss caused by the large angle collision of two liquid flows with large flow velocity differences after confluence, but also effectively alleviate the fluid turbulence caused by the collision, and avoid the influence of the jet channel on the turbulence of the fluid in the flow-increasing channel during high-speed injection, thereby improving the performance of the jet pump.

[0009] In some optional embodiments, the surface of the first section located in the flow-increasing channel is parallel or nearly parallel to the axis of the jet channel.

[0010] Through the above-mentioned arrangement, it is beneficial to rectify the fluid entering the flow-increasing channel from the water inlet chamber, improve the flow state of the fluid and then merge with the fluid in the flow-increasing channel, which is beneficial for the fluid to enter the flow-increasing channel from the outlet more evenly and merge, reducing energy loss and helping to improve the efficiency of the flow-increasing pump.

[0011] In some optional embodiments, the surface of the second section located in the flow-increasing channel is closer to the axis of the jet channel than the surface of the first section located in the flow-increasing channel.

[0012] Since the second section is located in the diffusion section of the jet channel, the above design is conducive to the fluid output from the outlet to converge in a manner that is almost the same or similar to the flow direction of the fluid in the jet channel, further alleviating the energy loss caused by the impact.

[0013] In some optional embodiments, the first section of the surface located in the flow-increasing channel and the second section of the surface located in the flow-increasing channel are transitioned through a first curved surface, and the first curved surface is recessed in the isolation wall.

[0014] The transition through the first arc surface is beneficial to guiding and stabilizing the flow of the fluid entering the second section from the first section, improving the flow state of the fluid output from the second section, and allowing the fluid to enter the flow-increasing channel from the outlet more evenly and converge, thereby helping to improve the efficiency of the jet pump capable of increasing flow and reduce the vibration of the jet pump capable of increasing flow.

[0015] In some optional embodiments, the circumferential dimension of the outlet in the jet channel gradually increases along the fluid direction; or,

[0016] The circumferential dimension of the outlet located in the jet channel gradually increases along the fluid direction and then remains unchanged.

[0017] The above arrangement is helpful to enlarge the outlet, so that the fluid entering from the flow-increasing channel can be uniformly merged with the jet channel, and is helpful to reduce the adverse effect on the water pressure in the flow-increasing channel.

[0018] In some optional embodiments, the side of the flow-increasing channel facing away from the isolation wall has a first wall and a second wall arranged in sequence along the fluid direction, the second wall is parallel to or tends to be parallel to the axis of the jet channel, the second wall is closer to the axis of the jet channel than the first wall, and a corner is formed at the connection between the first wall and the second wall, and the radial projection of the corner along the flow-increasing channel is located in the second section.

[0019] By controlling the radial projection of the corner along the flow-increasing channel to be located in the second section, the fluid flowing out of the first wall can quickly and smoothly enter the second section through the limitation and guidance of the corner, and then enter from the outlet located at the second end and merge with the fluid in the jet channel, which is beneficial to improving the water flow efficiency.

[0020] In some optional embodiments, the first wall and the second wall transition through a second curved surface to form a corner, and the second curved surface is recessed into the flow-increasing channel.

[0021] The arrangement in which the first wall and the second wall transition to the second arc surface recessed into the flow-increasing channel and form a corner facilitates the fluid flowing out of the first wall to enter the second section steadily, quickly and smoothly through the limitation and guidance of the second arc surface, and then enter from the outlet located at the second end and merge with the fluid in the jet channel, which helps to improve the water flow efficiency.

[0022] In some optional embodiments, the cross-sectional area of ​​the flow-increasing channel gradually decreases from the side close to the water inlet chamber to the direction close to the outlet.

[0023] The above arrangement is helpful to increase the pressure of the liquid flowing from the flow-increasing channel into the pressurizing chamber.

[0024] In some optional embodiments, the flow-increasing channel is disposed on a single side of the jet channel.

[0025] Compared with the circumferential setting, the unilateral setting can allow the flow-increasing channel to pass larger particles such as mud and sand without increasing the size of the flow-increasing jet pump, thereby preventing blockage.

[0026] In some optional embodiments, a one-way check mechanism is provided in the flow-increasing channel for conducting or blocking the flow of liquid in the flow-increasing channel; when the liquid pressure in the water inlet chamber is greater than the liquid pressure in the pressurization chamber, the one-way check mechanism conducts the flow-increasing channel; when the liquid pressure in the water inlet chamber is less than the liquid pressure in the pressurization chamber, the one-way check mechanism blocks the flow-increasing channel.

[0027] When the flow-increasing jet pump is in a low-lift, high-flow working state, the liquid pressure in the water inlet chamber is greater than the liquid pressure in the boosting chamber, and the one-way check mechanism conducts the flow-increasing channel, thereby increasing the water inlet flow between the water inlet chamber and the boosting chamber, effectively increasing the upper limit of the jet pump flow. When the pump body is in a high-lift, low-flow working state, the liquid pressure in the water inlet chamber is less than the liquid pressure in the boosting chamber, and the one-way check mechanism blocks the flow-increasing channel, thereby reducing the water inlet flow between the water inlet chamber and the boosting chamber, effectively increasing the upper limit of the jet pump head.

[0028] That is, by opening an additional flow-increasing channel between the water inlet chamber and the boosting chamber, and using a one-way check mechanism to control the conduction or blocking of the liquid flow in the flow-increasing channel according to the pressure changes between the boosting chamber and the water inlet chamber in the pump body, the curve relationship diagram of the jet pump flow rate and head is optimized, which significantly improves the performance of the jet pump with flow increase, while also ensuring that the liquid will not flow back through the flow-increasing channel.

[0029] In some optional embodiments, the one-way check mechanism includes a valve seat and a valve core.

[0030] The valve seat is installed at the water inlet end of the flow-increasing channel, and the valve seat has a channel connecting the flow-increasing channel and the water inlet chamber; the valve core is arranged in the flow-increasing channel, and the valve core can selectively abut the valve seat and seal the channel.

[0031] Through the cooperation of the valve seat and the valve core, the flow-increasing channel can be blocked and conducted. Through the setting of the valve seat, the valve core can be limited. This is beneficial for the valve core to abut against the valve seat and seal the channel when the liquid pressure in the water inlet chamber is lower than the liquid pressure in the boosting chamber, thereby blocking the flow-increasing channel and further limiting the valve core from passing through the valve seat, thereby extending the service life of the one-way check mechanism.

[0032] In some optional embodiments, the valve seat has a limit stopper arranged in the channel, the valve core has an abutment surface facing the valve seat, and the limit stopper is used to contact the abutment surface and limit the valve core from penetrating into the valve seat.

[0033] By setting the limit stopper, the penetration of the valve core into the valve seat can be further restricted, thereby preventing the one-way check mechanism from failing due to the penetration of the valve core into the valve seat, and failing to achieve the function of blocking and opening the flow-increasing channel.

[0034] In some optional embodiments, the end surface of the valve seat facing the valve core is a concave surface, and the valve core has an abutting surface facing the valve seat, and the abutting surface protrudes toward the valve core to cooperate with the concave surface and seal the channel.

[0035] Compared with a flat sealing structure, the above-mentioned concave and convex surface sealing method can effectively increase the contact area between the valve core and the valve seat, and the sealing effect is better, so that the fluid will not flow back through the flow-increasing channel, thereby avoiding pressure leakage in the pump.

[0036] In some optional embodiments, the valve core includes an annular elastic support seat and a valve flap.

[0037] The elastic support seat is embedded in the flow-increasing channel; the end of the valve flap away from the jet channel is connected to the elastic support seat, and the valve flap is flippably arranged in the elastic support seat so that the valve flap can selectively abut the elastic support seat and the valve seat and seal the channel.

[0038] It is understandable that the role of the elastic support seat is similar to that of an O-ring, and the provision of the elastic support seat is conducive to improving the sealing effect of the valve disc. When the liquid pressure in the water inlet chamber is less than the liquid pressure in the boost chamber, the high pressure inside the pump body will push the valve disc to flip toward the valve seat, and the valve disc will contact the elastic support seat and the valve seat, thereby quickly closing the flow-increasing channel. When the liquid pressure in the water inlet chamber is less than the liquid pressure in the boost chamber, the high pressure inside the pump body will push the valve disc to flip away from the valve seat, thereby quickly opening the flow-increasing channel.

[0039] The one-way check mechanism has a simple structure, low manufacturing cost, is easy to assemble, and is not easily damaged during use. At the same time, it can allow mud and sand of larger size to pass through, thereby reducing the risk of blockage in the flow-increasing channel.

[0040] In some optional embodiments, an end of the valve flap facing away from the jet channel is provided with an elastic connection portion connected to the elastic support seat.

[0041] By setting the elastic connection part, the valve flap can be turned over in the elastic support seat.

[0042] In some optional embodiments, the thickness of the elastic connection portion is smaller than the thickness of the valve flap and the elastic support seat, respectively.

[0043] Reducing the thickness of the elastic connection portion is beneficial to improving the folding resistance.

[0044] In some optional embodiments, one end of the valve core facing away from the jet channel is connected to the flow increasing channel, and the valve core is flippably arranged in the flow increasing channel so that the valve core can selectively abut against the valve seat and seal the channel.

[0045] Under this setting condition, the valve core structure is simple and easy to set up, which is conducive to reducing the cost.

[0046] In some optional embodiments, a limiter is provided in the flow increasing channel, and a cavity for the valve core to reciprocate and translate is formed between the limiter and the valve seat.

[0047] The limit piece limits the movement stroke of the valve core to prevent the valve core from moving beyond the limit when the force is large, and the valve core is difficult to move to the valve seat when the flow increase channel is blocked.

[0048] In some optional embodiments, the valve seat has a fixed seat arranged in the channel, and there is a gap between the inner wall of the channel and the fixed seat. The valve core includes a sealing plate and a valve stem. The sealing plate is movably arranged in the cavity. The sealing plate has a first state in which it abuts against the valve seat and seals the gap, and a second state in which it abuts against the limit member to open the gap; one end of the valve stem can be slidably penetrated in the fixed seat, and the other end is connected to the sealing plate to drive the sealing plate to switch between the first state and the second state.

[0049] The one-way check mechanism has a simple structure and does not require a spring. It relies on the pressure difference between the water outlet and the water inlet of the pump body to open and close the flow-increasing channel, effectively solving the noise caused by the spring vibrating under a specific pressure due to the pressure difference. This solution is easy to install and economical.

[0050] When the fluid enters the water inlet chamber from the water inlet, part of the water enters the flow-increasing channel from the one-way check mechanism, and the other part of the water enters the flow-increasing channel below, thereby increasing the water flow entering the boosting chamber and increasing the full-open flow of the flow-increasing jet pump; when the valve at the water outlet is closed or reduced, the high pressure in the pump body cavity pushes the valve stem to move toward the water inlet, and the valve stem drives the sealing plate to move toward the valve seat so that the sealing plate contacts the valve seat, thereby sealing the channel to block the flow-increasing channel, so that water no longer returns through the flow-increasing channel, and the jet pump head remains unchanged at this time.

[0051] In some optional embodiments, the sealing plate has an abutting area abutting against the end surface of the valve seat, and the abutting area is provided with a first sealing ring.

[0052] By providing the first sealing ring, the sealing plate and the valve seat can be in contact with each other through the first sealing ring, which is beneficial to improving the sealing effect and the blocking effect.

[0053] In some optional embodiments, the valve core includes a valve core body and a second sealing ring.

[0054] The valve core body has a limiting ridge arranged along its circumference, and the limiting ridge has a limiting surface matched with the end surface of the valve seat; the second sealing ring is arranged on the limiting surface along the circumference of the valve core body.

[0055] When the fluid enters the water inlet chamber from the water inlet, part of the water enters the flow-increasing channel from the one-way check mechanism, and the other part of the water enters the flow-increasing channel below, pushing the valve core body to move to the side away from the valve seat until it abuts against the limiter to open the flow-increasing channel, thereby increasing the water flow entering the boosting chamber and increasing the full-open flow of the flow-increasing jet pump; when the valve at the water outlet is closed or reduced, the high pressure in the pump body cavity pushes the valve core body to move toward the water inlet, so that the second sealing ring contacts the valve seat, thereby sealing the channel to block the flow-increasing channel, so that water no longer returns through the flow-increasing channel, and the jet pump head remains unchanged at this time.

[0056] The above arrangement has a simple structure and low construction cost.

[0057] In some optional embodiments, the wall surface enclosing the cavity is provided with a guide piece, and the valve core in the cavity moves to the valve seat through the guide piece.

[0058] The setting of the guide piece can ensure that the valve core can move to the valve seat position stably and reliably to achieve the blocking of the valve seat.

[0059] In some optional embodiments, the flow-boosting jet pump includes a reinforcement member located in the water inlet chamber. The reinforcement member is respectively connected to the valve seat and the inner wall of the water inlet chamber, and the reinforcement member divides the water inlet chamber into multiple chamber units connected to the boosting chamber.

[0060] The provision of the reinforcement piece can not only limit the movement of the valve seat but also facilitate installation.

[0061] In some optional embodiments, the flow-increasing jet pump further includes a filtering mechanism disposed at the water inlet.

[0062] Pre-filter through the filtering mechanism to avoid channel clogging. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0064] Figure 1 A schematic diagram of the structure of a jet pump capable of increasing flow provided in Example 1 of the present application;

[0065] Figure 2A schematic structural diagram of the flow-increasing channel conduction of the flow channel body structure provided in Example 1 of the present application from a first perspective;

[0066] Figure 3 A schematic structural diagram of the flow channel body structure provided in Example 1 of the present application, showing the flow-increasing channel blocking from a first-view perspective;

[0067] Figure 4 A schematic structural diagram of the flow channel body structure provided in Example 1 of the present application from a second viewing angle;

[0068] Figure 5 A schematic diagram of the assembly of the valve seat and the jet channel provided in Example 1 of the present application;

[0069] Figure 6 A schematic diagram of the structure of the valve core provided in Example 1 of the present application;

[0070] Figure 7 A schematic diagram of fluid simulation of a jet pump capable of increasing flow provided in Example 1 of the present application;

[0071] Figure 8 This is a comparison chart of the jet pump head and flow rate curve before and after flow increase;

[0072] Fig. 9 It is a comparison diagram of the flow efficiency curve of the jet pump before and after the flow increase;

[0073] Fig.10 A schematic diagram of the structure of a jet pump capable of increasing flow provided in Example 2 of the present application;

[0074] Fig.11 A schematic diagram of the structure of the flow channel body provided in Example 3 of the present application;

[0075] Fig.12 A schematic diagram of the structure of the flow channel body provided in Example 4 of the present application;

[0076] Fig.13 This is a schematic structural diagram of the flow channel body structure provided in Example 5 of the present application.

[0077] Icon: 1000-flow-increasing jet pump; 11-pump body; 12-water inlet; 13-water outlet; 14-water inlet chamber; 15-pressurization chamber; 16-flow channel structure; 17-separation wall; 171-first section; 172-second section; 173-first arc surface; 174-export outlet; 18-jet channel; 19-flow-increasing channel; 191-first wall; 192-second wall; 193-second arc surface; 194-limiting member ;195-guide plate;20-one-way check mechanism;21-valve seat;211-channel;212-limit stopper;213-fixed seat;22-valve core;221-abutment surface;222-elastic support seat;223-valve flap;224-elastic connecting part;225-sealing plate;226-valve stem;228-valve core body;2281-limiting ridge;229-second sealing ring;23-reinforcement member;24-filter mechanism. DETAILED DESCRIPTION

[0078] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0079] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0080] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0081] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0082] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0083] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0084] Example 1

[0085] like Figure 1 As shown, a jet pump 1000 capable of increasing flow includes a pump body 11 having a water inlet 12 and a water outlet 13, a water inlet chamber 14, a pressurizing chamber 15, and a flow channel structure 16 are arranged in the pump body 11, the water inlet chamber 14 is communicated with the water inlet 12, and the pressurizing chamber 15 is communicated with the water outlet 13;

[0086] See also Figure 1 , Figure 2 as well as Figure 3 ,in, Figure 2 The direction indicated by the arrow is the direction of fluid flow. The flow channel structure 16 includes a partition wall 17, and a jet channel 18 and a flow-increasing channel 19 located on opposite sides of the partition wall 17. The two ends of the jet channel 18 are respectively connected to the water inlet chamber 14 and the boosting chamber 15, and the two ends of the flow-increasing channel 19 are respectively connected to the water inlet chamber 14 and the jet channel 18.

[0087] Among them, the isolation wall 17 includes a first section 171 and a second section 172 distributed along the extension direction of the jet channel 18, the second section 172 is located in the diffusion section of the jet channel 18, the thickness of the second section 172 is smaller than that of the first section 171, and the outlet 174 of the flow-increasing channel 19 for discharging the fluid is opened in the second section 172.

[0088] It can be understood that since the second section 172 is located in the diffusion section of the jet channel 18, the outlet 174 of the flow-increasing channel 19 for discharging the fluid is opened in the second section 172, that is, the outlet 174 of the flow-increasing channel 19 for discharging the fluid is located in the diffusion section of the jet channel 18, so that the fluid discharged from the flow-increasing channel 19 merges with the fluid in the flow-increasing channel 19 before entering the boosting chamber 15, which is beneficial to improving the reflux efficiency and the suction range of the jet pump (that is, the height to which the jet pump draws up the water) is improved.

[0089] Since the opposite sides of the isolation wall 17 are respectively the jet channel 18 and the flow-increasing channel 19, and the isolation wall 17 includes a first section 171 and a second section 172 distributed along the extension direction of the jet channel 18, therefore, by controlling the thickness of the second section 172 to be smaller than the first section 171, the outlet 174 of the flow-increasing channel 19 for exporting the fluid is opened in the second section 172. On the one hand, it can alleviate or avoid the phenomenon of disturbance and turbulence in the process of fluid passing through, and on the other hand, it makes the fluid output from the flow-increasing channel 19 have almost the same or similar flow direction as the fluid in the jet channel 18 after entering the jet channel 18, which can not only effectively reduce the energy loss caused by the large angle collision of two liquid flows with large flow velocity difference after confluence, but also effectively alleviate the fluid turbulence caused by the collision, and avoid the influence of the jet channel 18 on the fluid in the flow-increasing channel 19 increasing turbulence during high-speed injection, thereby improving the performance of the jet pump 1000 with flow increase.

[0090] The surface of the first section 171 located on the flow-increasing channel 19 is parallel to or nearly parallel to the axis of the jet channel 18 .

[0091] It can be understood that tending to be parallel means that the angle between the surface of the first section 171 located in the flow-increasing channel 19 and the axial direction of the jet channel 18 is small. In the present application, tending to be parallel means that the angle between the surface of the first section 171 located in the flow-increasing channel 19 and the axial direction of the jet channel 18 is 20° or less.

[0092] Through the above-mentioned arrangement, it is beneficial to rectify the fluid entering the flow-increasing channel 19 from the water inlet chamber 14, improve the flow state of the fluid and then merge with the fluid in the flow-increasing channel 19, and help the fluid to enter the flow-increasing channel 19 and merge more evenly from the guide outlet 174, thereby reducing energy loss and improving the efficiency of the flow-increasing pump.

[0093] like Figure 2 as well as Figure 3 As shown, the surface of the second section 172 located on the flow increasing channel 19 is closer to the axis of the jet channel 18 than the surface of the first section 171 located on the flow increasing channel 19 .

[0094] Since the second section 172 is located in the diffusion section of the jet channel 18, the above design is conducive to the fluid output from the outlet 174 to converge in a manner that is almost the same or similar to the flow direction of the fluid in the jet channel 18, further alleviating the energy loss caused by the impact.

[0095] The surface of the first section 171 located at the flow-increasing channel 19 and the surface of the second section 172 located at the flow-increasing channel 19 may be transitioned through a plane or through an arc surface.

[0096] like Figure 2 and Figure 3 As shown, in this embodiment, the first section 171 is located on the surface of the flow-increasing channel 19 and the second section 172 is located on the surface of the flow-increasing channel 19 through a first arc surface 173 , and the first arc surface 173 is recessed in the isolation wall 17 .

[0097] That is, the first section 171 is located on the surface of the flow-increasing channel 19 and the second section 172 is located on the surface of the flow-increasing channel 19 through the first arc surface 173 concave in the isolation wall 17 .

[0098] The transition described here can also be understood as connection or connection. The surface of the first section 171 located in the flow-increasing channel 19 and the surface of the second section 172 located in the flow-increasing channel 19 are not parallel as a whole. The transition through the first arc surface 173 is conducive to guiding and stabilizing the fluid entering the second section 172 from the first section 171, improving the flow state of the fluid output from the second section 172, and allowing the fluid to enter the flow-increasing channel 19 from the guide outlet 174 more evenly and converge, thereby helping to improve the efficiency of the jet pump 1000 capable of increasing flow and reduce the vibration of the jet pump 1000 capable of increasing flow.

[0099] like Figure 4 As shown, in this embodiment, the circumferential dimension of the outlet 174 located in the jet channel 18 gradually increases along the fluid direction, or,

[0100] The circumferential dimension of the outlet 174 located in the jet channel 18 first gradually increases along the fluid direction and then remains unchanged.

[0101] That is, at this time, the orthographic projection of the outlet 174 on the horizontal plane where the axial direction of the jet channel 18 is located is V-shaped, or the orthographic projection from the beginning along the jet direction is V-shaped.

[0102] The above arrangement is helpful to enlarge the outlet 174 , so that the fluid entering from the flow-increasing channel 19 can be uniformly merged with the jet channel 18 , and is helpful to reduce the adverse effect on the water pressure in the flow-increasing channel 19 .

[0103] Further based on Figure 2 and Figure 3It can be seen that the side of the flow-increasing channel 19 facing away from the isolation wall 17 has a first wall 191 and a second wall 192 arranged in sequence along the fluid direction, the second wall 192 is parallel or tends to be parallel to the axis of the jet channel 18, the second wall 192 is closer to the axis of the jet channel 18 than the first wall 191, and a corner is formed at the connection between the first wall 191 and the second wall 192, and the radial projection of the corner along the flow-increasing channel 19 is located in the second section 172.

[0104] It can be understood that tending to be parallel means that the angle between the second wall 192 and the axis of the jet channel 18 is small. In the present application, tending to be parallel means that the angle between the second wall 192 and the axis of the jet channel 18 is within 20°.

[0105] It should be noted that the cross-sectional shape of the flow-increasing channel 19 can be circular, elliptical or polygonal, etc. Usually, the cross-sectional shape of the flow-increasing channel 19 is circular, and the first wall 191 and the second wall 192 here define the contour shape of the side of the flow-increasing channel 19 away from the isolation wall 17.

[0106] It is understandable that, since the connection between the first wall 191 and the second wall 192 forms a corner and the second wall 192 is closer to the axis of the jet channel 18 than the first wall 191 , the side of the flow-increasing channel 19 away from the isolation wall 17 is arranged in an S-shape.

[0107] By controlling the radial projection of the corner along the flow-increasing channel 19 to be located in the second section 172, the fluid flowing out of the first wall 191 can quickly and smoothly enter the second section 172 through the limitation and guidance of the corner, and then enter from the outlet 174 located at the second end and merge with the fluid in the jet channel 18, which is beneficial to improving the water flow efficiency.

[0108] The first wall 191 and the second wall 192 transition to form a corner through the second arc surface 193 , and the second arc surface 193 is recessed into the flow-increasing channel 19 .

[0109] The first wall 191 and the second wall 192 transition to form a corner through the second arc surface 193 recessed into the flow-increasing channel 19, which is conducive to the fluid flowing out of the first wall 191 to enter the second section 172 smoothly, quickly and smoothly through the limitation and guidance of the second arc surface 193, and then enter from the outlet 174 located at the second end and merge with the fluid in the jet channel 18, which is conducive to improving the water flow efficiency.

[0110] It can be understood that, in the direction from the side close to the water inlet chamber 14 to the direction close to the outlet 174 , the cross-sectional area of ​​the flow-increasing channel 19 can remain unchanged or gradually decrease.

[0111] like Figures 1 to 3As shown, in this embodiment, the cross-sectional area of ​​the flow-increasing channel 19 gradually decreases from the side close to the water inlet chamber 14 to the direction close to the outlet 174 .

[0112] The above arrangement is helpful to increase the pressure of the liquid flowing from the flow increasing channel 19 into the pressurizing chamber 15 .

[0113] It should be noted that the shape of the cross section of the flow-increasing channel 19 includes but is not limited to a circle, an ellipse or a polygon, etc., and can be selected according to actual needs. In this embodiment, the shape of the cross section of the flow-increasing channel 19 is a circle.

[0114] It can be understood that the flow-increasing channel 19 can be arranged on a single side of the jet channel 18 , or can be arranged in the circumferential direction of the jet channel 18 .

[0115] like Figures 1 to 4 As shown, the flow-increasing channel 19 is arranged on a single side of the jet channel 18 .

[0116] Compared with the circumferential setting, the unilateral setting can allow the flow-increasing channel 19 to allow larger particles such as mud and sand to pass through without increasing the size of the flow-increasing jet pump 1000, thereby preventing blockage.

[0117] like Figure 1 As shown, in this embodiment, the water inlet 12, the water outlet 13 and the flow-increasing channel 19 are all located on the same side of the jet channel 18, with a compact structure, high space utilization, and easy one-piece molding.

[0118] Please continue reading Figures 1 to 3 The flow-increasing channel 19 is provided with a one-way check mechanism 20 for conducting or blocking the flow of the liquid in the flow-increasing channel 19. When the liquid pressure of the water inlet chamber 14 is greater than the liquid pressure of the boosting chamber 15, Figure 2 The one-way check mechanism 20 shown in the figure conducts the flow-increasing channel 19; when the liquid pressure of the water inlet chamber 14 is less than the liquid pressure of the pressurizing chamber 15, as Figure 3 The one-way check mechanism 20 shown blocks the flow increasing passage 19 .

[0119] When the flow-increasing jet pump 1000 is in a low-lift, high-flow working state, the liquid pressure in the water inlet chamber 14 is greater than the liquid pressure in the boost chamber 15, and the one-way check mechanism 20 conducts the flow-increasing channel 19, thereby increasing the water inlet flow between the water inlet chamber 14 and the boost chamber 15, effectively increasing the upper limit of the jet pump flow. When the pump body 11 is in a high-lift, low-flow working state, the liquid pressure in the water inlet chamber 14 is less than the liquid pressure in the boost chamber 15, and the one-way check mechanism 20 blocks the flow-increasing channel 19, thereby reducing the water inlet flow between the water inlet chamber 14 and the boost chamber 15, effectively increasing the upper limit of the jet pump head.

[0120] That is, by additionally opening a flow-increasing channel 19 between the water inlet chamber 14 and the boosting chamber 15, and by means of a one-way check mechanism 20, the conduction or blocking of the liquid flow in the flow-increasing channel 19 is controlled according to the pressure change between the boosting chamber 15 and the water inlet chamber 14 in the pump body 11, thereby optimizing the curve relationship diagram of the jet pump flow rate and the head, significantly improving the performance of the jet pump 1000 with flow-increasing function, and also ensuring that the liquid will not flow back through the flow-increasing channel 19.

[0121] Specifically, Figure 2 As shown, the one-way check mechanism 20 includes a valve seat 21 and a valve core 22 .

[0122] The valve seat 21 is installed at the water inlet end of the flow-increasing channel 19 , and the valve seat 21 has a channel 211 connecting the flow-increasing channel 19 and the water inlet chamber 14 ; the valve core 22 is arranged in the flow-increasing channel 19 , and the valve core 22 can selectively abut the valve seat 21 and seal the channel 211 .

[0123] It can be understood that the selectivity here means that when the liquid pressure of the water inlet chamber 14 is greater than the liquid pressure of the boost chamber 15, at least part of the valve core 22 is separated from the valve seat 21 and the channel 211 is connected to the flow-increasing channel 19. When the liquid pressure of the water inlet chamber 14 is less than the liquid pressure of the boost chamber 15, the valve core 22 can selectively abut against the valve seat 21 and seal the channel 211 to block the flow-increasing channel 19.

[0124] Through the cooperation of the valve seat 21 and the valve core 22, the flow-increasing channel 19 can be blocked and conducted. Through the setting of the valve seat 21, the valve core 22 can be limited, which is beneficial for the valve core 22 to abut against the valve seat 21 and seal the channel 211 when the liquid pressure in the water inlet chamber 14 is lower than the liquid pressure in the boosting chamber 15, thereby blocking the flow-increasing channel 19 and further limiting the valve core 22 from passing through the valve seat 21, thereby extending the service life of the one-way check mechanism 20.

[0125] Exemplarily, the valve seat 21 can be a ring continuously distributed along the circumference of the flow increasing channel 19. It can be understood that the valve seat 21 protrudes from the inner wall of the flow increasing channel 19, that is, the end surface of the valve seat 21 facing the valve core 22 can serve as a limiting surface to restrict the valve core 22 from passing through the valve seat 21 to a certain extent, causing the one-way check mechanism 20 to fail and unable to achieve the function of blocking and opening the flow increasing channel 19.

[0126] The valve core 22 has an abutting surface 221 facing the valve seat 21 .

[0127] according to Figure 2 , Figure 3 as well as Figure 5 The valve seat 21 has a limit stopper 212 disposed in the channel 211 , and the limit stopper is used to contact the abutment surface 221 and limit the valve core 22 from penetrating into the valve seat 21 .

[0128] By setting the limit stopper, the valve core 22 can be further restricted from penetrating into the valve seat 21, thereby preventing the one-way check mechanism 20 from failing due to the valve core 22 penetrating into the valve seat 21, and failing to realize the function of blocking and opening the flow-increasing channel 19.

[0129] Exemplarily, the stopper may be a plurality of first stop plates spaced apart along the circumference of the channel 211 .

[0130] Exemplarily, the stopper is a second stopper plate whose opposite ends are respectively connected to the channel 211, and the second stopper plate divides the channel 211 into two channel 211 units, each of which is respectively connected to the water inlet chamber 14 and the boost chamber 15. The above arrangement not only has a good stopper effect, but also helps to improve the connection stability between the stopper and the valve seat 21.

[0131] For example, Figure 5 As shown, the stopper has a fixing portion and a plurality of connecting portions, the fixing portion extends along the axial direction of the channel 211, the plurality of connecting portions are arranged along the circumference of the fixing portion, and one end of each connecting portion away from the fixing portion is connected to the wall of the channel 211. The above arrangement not only has a good limiting effect, but also helps to improve the connection stability between the stopper and the valve seat 21.

[0132] The end surface of the valve seat 21 facing the valve core 22 can be a plane. In this case, the abutment surface 221 of the valve core 22 and the valve seat 21 is also a plane. In this case, the valve core 22 and the valve seat 21 are sealed via a plane.

[0133] like Figure 2 as well as Figure 3 As shown, the end surface of the valve seat 21 facing the valve core 22 is a concave surface, and the valve core 22 has an abutting surface 221 facing the valve seat 21, and the abutting surface 221 protrudes toward the valve core 22 to cooperate with the concave surface and seal the channel 211. It can be understood that the end surface of the valve seat 21 facing the valve core 22 is annular, and the concave surface here actually refers to the concave surface formed by the diameter of the annular end surface gradually increasing from the inner edge to the outer edge along the fluid flow direction.

[0134] Compared with a flat sealing structure, the above-mentioned concave and convex surface sealing method can effectively increase the contact area between the valve core 22 and the valve seat 21, and the sealing effect is better, so that the fluid will not flow back through the flow-increasing channel 19, thereby avoiding pressure leakage in the pump.

[0135] like Figure 2 As shown, in this embodiment, the abutting surface 221 is a part of a spherical surface.

[0136] like Figure 2 , Figure 3 and Figure 6 As shown, the valve core 22 includes an annular elastic support seat 222 and a valve flap 223 .

[0137] The elastic support seat 222 is embedded in the flow increasing channel 19; the end of the valve flap 223 away from the jet channel 18 is connected to the elastic support seat 222, and the valve flap 223 is flippably arranged in the elastic support seat 222 so that the valve flap 223 can selectively abut the elastic support seat 222 and the valve seat 21 and seal the channel 211.

[0138] The elastic support seat 222 is embedded in the flow-increasing channel 19 in the following manner: a mounting groove is provided along the circumference of the flow-increasing channel 19, wherein the elastic support seat 222 is embedded in the mounting groove and has an interference fit with the mounting groove. In order to reduce the influence of the elastic support seat 222 on the flow area of ​​the flow-increasing channel 19, the surface of the elastic support seat 222 can be flush with the surface of the flow-increasing channel 19.

[0139] It is understandable that the role of the elastic support seat 222 is similar to that of an O-ring, and the provision of the elastic support seat 222 is conducive to improving the sealing effect of the valve flap 223. When the liquid pressure of the water inlet chamber 14 is less than the liquid pressure of the boost chamber 15, the high pressure inside the pump body 11 will push the valve flap 223 to flip toward the valve seat 21, and the valve flap 223 will contact the elastic support seat 222 and the valve seat 21, thereby quickly closing the flow-increasing channel 19. When the liquid pressure of the water inlet chamber 14 is less than the liquid pressure of the boost chamber 15, the high pressure inside the pump body 11 will push the valve flap 223 to flip away from the valve seat 21, thereby quickly opening the flow-increasing channel 19.

[0140] It can be understood that at this time, the side of the valve flap 223 facing the valve seat 21 serves as the abutting surface 221 .

[0141] The one-way check mechanism 20 has a simple structure, low manufacturing cost, is easy to assemble, and is not easily damaged during use. It can also allow mud and sand of a larger size to pass through, thereby reducing the risk of blockage of the flow-increasing channel 19 .

[0142] like Figure 6 As shown, an elastic connection portion 224 connected to the elastic support seat 222 is provided at one end of the valve flap 223 away from the jet channel 18 .

[0143] By disposing the elastic connection portion 224 , the valve flap 223 can be turned over in the elastic support seat 222 .

[0144] The valve flap 223 may also be made of elastic material, or other materials, or rubber mixed with reinforcing fibers.

[0145] In this embodiment, the valve flap 223 is made of elastic material, and the valve flap 223, the elastic connecting portion 224 and the elastic supporting seat 222 are integrally formed.

[0146] The thickness of the elastic connection portion 224 may be the same as or different from the thickness of the valve flap 223 and the elastic support seat 222 .

[0147] like Figure 6 As shown, the thickness of the elastic connection portion 224 is smaller than the thickness of the valve flap 223 and the elastic support seat 222 .

[0148] By reducing the thickness of the elastic connection portion 224 , the folding resistance can be improved.

[0149] like Figure 2 As shown, the flow-increasing jet pump 1000 includes a reinforcement member 23, which is located in the water inlet chamber 14. The reinforcement member 23 is respectively connected to the valve seat 21 and the inner wall of the water inlet chamber 14. The reinforcement member 23 divides the water inlet chamber 14 into a plurality of chamber units connected to the boosting chamber 15.

[0150] The provision of the reinforcement member 23 can not only limit the movement of the valve seat 21 but also facilitate installation.

[0151] Optionally, the reinforcement member 23 is formed integrally with the pump body 11 .

[0152] in, Figure 7 A fluid simulation diagram of a jet pump 1000 capable of increasing flow provided in Example 1, wherein arrows indicate the direction of fluid flow. Figure 7 It can be seen that the fluid output from the flow-increasing channel 19 during confluence has almost the same or similar flow direction as the fluid in the jet channel 18 after entering the jet channel 18. This can not only effectively reduce the energy loss caused by the large-angle collision of two liquid flows with a large velocity difference after confluence, but also effectively alleviate turbulence, avoiding the influence of the jet channel 18 on the fluid in the flow-increasing channel 19 during high-speed injection, thereby improving the performance of the flow-increasing jet pump 1000.

[0153] The jet pump 1000 capable of increasing flow provided in Example 1 is used as the jet pump after increasing flow, and the jet pump which is different from Example 1 only in that the jet pump is not provided with the flow increasing channel 19 is used as the jet pump before increasing flow. The performance of the jet pump before and after increasing flow is tested. The results are as follows: Figure 8 as well as Fig. 9 shown. Figure 8 Comparison of the jet pump head and flow rate curve before and after flow increase ( Figure 8 The horizontal axis is flow rate, and the vertical axis is head); Fig. 9 This is a comparison chart of the flow efficiency curve of the jet pump before and after flow increase. Figure 8 as well as Fig. 9 , the performance of the jet pump can be significantly improved after the flow increase compared with before the flow increase.

[0154] Example 2

[0155] The main difference between it and Example 1 is: Fig.10 As shown, a filter mechanism 24 is provided at the water inlet 12 of the flow-increasing jet pump 1000. The filter mechanism 24 includes but is not limited to a filter net or a filter element.

[0156] At this time, the flow channel structure 16 is inverted in the pump body 11 , and the inversion here means that the flow-increasing channel 19 is located on the side of the jet channel 18 away from the water outlet 13 .

[0157] Example 3

[0158] The main difference between the embodiment 1 and the embodiment 1 is the difference in the valve core 22 .

[0159] like Fig.11 As shown, one end of the valve core 22 away from the jet channel 18 is connected to the flow increasing channel 19 , and the valve core 22 is flippably arranged in the flow increasing channel 19 , so that the valve core 22 can selectively abut against the valve seat 21 and seal the channel 211 .

[0160] Under this setting condition, the valve core 22 has a simple structure and is easy to set up, which is beneficial to reducing the cost of manufacturing. At the same time, it can allow mud and sand of larger size to pass through, which can reduce the risk of blockage of the flow-increasing channel 19.

[0161] Exemplarily, the valve core 22 is made of an elastic material, so that the valve core 22 can well block the channel 211 on the valve seat 21 and block the flow-increasing channel 19 .

[0162] Exemplarily, one end of the valve core 22 away from the jet channel 18 and the flow increasing channel 19 can be fixed to the flow increasing channel 19 by bolts or screws.

[0163] The abutting surface 221 of the valve core 22 is a part of a spherical surface.

[0164] Compared with a planar sealing structure, the spherical sealing method can effectively increase the contact area between the valve core 22 and the valve seat 21, and achieve a better sealing effect, so that the fluid will not flow back through the flow-increasing channel 19, thereby avoiding pressure leakage in the pump.

[0165] Example 4

[0166] The main difference between the embodiment 1 and the embodiment 1 is that a limiting member 194 and a one-way check mechanism 20 are provided in the flow increasing channel 19 .

[0167] like Fig.12 As shown, a limiting member 194 is provided in the flow increasing channel 19 , and a cavity for the valve core 22 to reciprocate and translate is formed between the limiting member 194 and the valve seat 21 .

[0168] The limit plate limits the movement stroke of the valve core 22 to prevent the valve core 22 from moving beyond the limit when the force is large, and when the flow-increasing channel 19 is blocked, the valve core 22 is difficult to move to the valve seat 21.

[0169] The limiting member 194 may be a limiting plate that is continuously or discontinuously arranged along the circumference of the flow-increasing channel 19 . Each limiting plate extends along the circumference of the flow-increasing channel 19 , and a limiting member 194 is formed between the limiting plate and the inner wall of the flow-increasing channel 19 .

[0170] In order to reduce the influence of the limiter 194 on the flow velocity and flow rate of the fluid in the flow increasing channel 19, and at the same time have a certain guiding effect on the fluid, such as Fig.12 As shown, the limiting member 194 is a plurality of limiting plates extending along the extension direction of the flow increasing channel 19 , and the plurality of limiting plates are arranged at intervals along the circumferential direction of the flow increasing channel 19 .

[0171] The valve seat 21 has a fixed seat 213 arranged in the channel 211, and there is a gap between the inner wall of the channel 211 and the fixed seat 213. The valve core 22 includes a sealing plate 225 and a valve stem 226. The sealing plate 225 is movably arranged in the cavity. The sealing plate 225 has a first state of abutting against the valve seat 21 and sealing the gap, and a second state of abutting against the limit member 194 to open the gap; one end of the valve stem 226 is slidably arranged in the fixed seat 213, and the other end is connected to the sealing plate 225 to drive the sealing plate 225 to switch between the first state and the second state.

[0172] The one-way check mechanism 20 has a simple structure and does not require a spring. It relies on the pressure difference between the water outlet 13 and the water inlet 12 of the pump body 11 to open and close the flow-increasing channel 19, effectively solving the noise caused by the pressure difference vibration of the spring under a specific pressure. This solution is easy to install and economical.

[0173] When the fluid enters the water inlet chamber 14 from the water inlet 12, a part of the water enters the flow-increasing channel 19 from the one-way check mechanism 20, and the other part of the water enters the flow-increasing channel 19 below, so that the water flow entering the boosting chamber 15 becomes larger, and the full-open flow of the flow-increasing jet pump 1000 becomes larger; when the valve of the water outlet 13 is reduced or closed, the high pressure in the cavity of the pump body 11 pushes the valve stem 226 to move toward the water inlet 12, and the valve stem 226 drives the sealing plate 225 to move toward the valve seat 21 so that the sealing plate 225 contacts the valve seat 21, and then the sealing channel 211 is used to block the flow-increasing channel 19, so that water no longer returns through the flow-increasing channel 19, and the jet pump head remains unchanged at this time.

[0174] In some optional embodiments, the sealing plate 225 has an abutting area abutting against the end surface of the valve seat 21, and the abutting area is provided with a first sealing ring (not shown).

[0175] By providing the first sealing ring, the sealing plate 225 can be in contact with the valve seat 21 through the first sealing ring, which is beneficial to improving the sealing effect and the blocking effect.

[0176] Example 5

[0177] The main difference between the embodiment 4 and the embodiment 4 is the one-way check mechanism 20 .

[0178] like Fig.13 As shown, the valve core 22 includes a valve core body 228 and a second sealing ring 229 .

[0179] The valve core body 228 has a limiting ridge 2281 arranged along its circumference, and the limiting ridge 2281 has a limiting surface that matches the end surface of the valve seat 21; the second sealing ring 229 is arranged on the limiting surface along the circumference of the valve core body 228.

[0180] At this time, a surface of the second sealing ring 229 facing the valve seat 21 serves as the abutting surface 221 .

[0181] When the fluid enters the water inlet chamber 14 from the water inlet 12, a part of the water enters the flow-increasing channel 19 from the one-way check mechanism 20, and the other part of the water enters the flow-increasing channel 19 below, pushing the valve core body 228 to move to the side away from the valve seat 21 until it abuts against the limit member 194 to open the flow-increasing channel 19, thereby increasing the water flow entering the boosting chamber 15 and increasing the full-open flow of the flow-increasing jet pump 1000; when the valve of the water outlet 13 is reduced or closed, the high pressure in the cavity of the pump body 11 pushes the valve core body 228 to move toward the water inlet 12, so that the sealing ring contacts the valve seat 21, and then seals the channel 211 to block the flow-increasing channel 19, so that water no longer returns through the flow-increasing channel 19, and the jet pump head remains unchanged at this time.

[0182] The above arrangement has a simple structure and low construction cost.

[0183] like Fig.13 As shown, the wall surface surrounding the cavity is provided with a guide piece 195 , and the valve core 22 located in the cavity moves to the valve seat 21 through the guide piece 195 .

[0184] The provision of the guide piece 195 can ensure that the valve core 22 can stably and reliably move to the position of the valve seat 21 to achieve the blocking of the valve seat 21 .

[0185] Among them, the number of guide plates 195 is multiple, and the multiple guide plates 195 are arranged at intervals along the circumference of the cavity. The multiple here includes but is not limited to 2, 3, 4, etc. In this embodiment, the number of guide plates 195 is 3, and the 3 guide plates 195 are arranged at equal intervals along the circumference of the cavity.

[0186] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A jet pump capable of increasing flow, characterized in that: The pump body comprises a water inlet and a water outlet, wherein a water inlet chamber, a pressure chamber, and a flow channel structure are arranged in the pump body, wherein the water inlet chamber is communicated with the water inlet, and the pressure chamber is communicated with the water outlet; The flow channel structure includes a partition wall, and a jet channel and a flow-increasing channel located on opposite sides of the partition wall, two ends of the jet channel are respectively connected to the water inlet chamber and the pressure-increasing chamber, and two ends of the flow-increasing channel are respectively connected to the water inlet chamber and the jet channel. Wherein, the isolation wall includes a first section and a second section distributed along the extension direction of the jet channel, the second section is located in the diffusion section of the jet channel, the thickness of the second section is smaller than the first section, and the outlet of the flow-increasing channel for discharging the fluid is opened in the second section.

2. The flow-increasing jet pump according to claim 1, characterized in that: The surface of the first section located in the flow-increasing channel is parallel or nearly parallel to the axis of the jet channel.

3. The flow-increasing jet pump according to claim 1, characterized in that: Compared with the first section being located on the surface of the flow-increasing channel, the second section being located on the surface of the flow-increasing channel closer to the axis of the jet channel.

4. The flow-increasing jet pump according to claim 3, characterized in that: The first section of the surface located at the flow-increasing channel and the second section of the surface located at the flow-increasing channel are transitioned through a first curved surface, and the first curved surface is recessed in the isolation wall.

5. The flow-increasing jet pump according to claim 1, characterized in that: The circumferential dimension of the outlet located in the jet channel gradually increases along the fluid direction; or, The circumferential dimension of the outlet located in the jet channel gradually increases along the fluid direction and then remains unchanged.

6. The flow-increasing jet pump according to claim 1, characterized in that: The side of the flow-increasing channel away from the isolation wall comprises a first wall and a second wall arranged in sequence along the fluid direction, the second wall is parallel to or tends to be parallel to the axis of the jet channel, the second wall is closer to the axis of the jet channel than the first wall, a corner is formed at the connection between the first wall and the second wall, and the orthographic projection of the corner along the radial direction of the flow-increasing channel is located in the second section.

7. The flow-increasing jet pump according to claim 6, characterized in that: The first wall and the second wall transition through a second arc surface to form the corner, and the second arc surface is recessed into the flow-increasing channel.

8. The flow-increasing jet pump according to claim 1, characterized in that: The cross-sectional area of ​​the flow-increasing channel gradually decreases in a direction from a side close to the water inlet chamber to a direction close to the outlet.

9. The flow-increasing jet pump according to claim 1, characterized in that: The flow-increasing channel is arranged on a single side of the jet channel.

10. The jet pump capable of increasing flow according to any one of claims 1 to 9, characterized in that: The flow-increasing channel is provided with a one-way check mechanism for opening or blocking the flow of liquid in the flow-increasing channel. When the liquid pressure in the water inlet chamber is greater than the liquid pressure in the pressurizing chamber, the one-way check mechanism opens the flow-increasing channel; when the liquid pressure in the water inlet chamber is less than the liquid pressure in the pressurizing chamber, the one-way check mechanism blocks the flow-increasing channel.

11. The flow-increasing jet pump according to claim 10, characterized in that: The one-way check mechanism comprises: a valve seat, mounted at the water inlet end of the flow-increasing channel, the valve seat having a channel connecting the flow-increasing channel and the water inlet chamber; and A valve core is disposed in the flow-increasing channel, and the valve core can selectively abut against the valve seat and seal the channel.

12. The flow-increasing jet pump according to claim 11, characterized in that: The valve seat has a limit stopper arranged in the channel, the valve core has an abutment surface facing the valve seat, and the limit stopper is used to contact the abutment surface and limit the valve core from penetrating into the valve seat.

13. The flow-increasing jet pump according to claim 11, characterized in that: The end surface of the valve seat facing one end of the valve core is a concave surface, and the valve core has an abutting surface facing the valve seat, and the abutting surface protrudes toward the valve core to cooperate with the concave surface and seal the channel.

14. The flow-increasing jet pump according to claim 11, characterized in that: The valve core comprises: an annular elastic support seat, embedded in the flow-increasing channel; and A valve flap, one end of the valve flap facing away from the jet channel is connected to the elastic support seat, and the valve flap is flippably arranged in the elastic support seat so that the valve flap can selectively abut against the elastic support seat and the valve seat to seal the channel.

15. The flow-increasing jet pump according to claim 14, characterized in that: An elastic connection portion connected to the elastic support seat is disposed at one end of the valve flap away from the jet channel.

16. The flow-increasing jet pump according to claim 15, characterized in that: The thickness of the elastic connection portion is respectively smaller than the thickness of the valve flap and the elastic support seat.

17. The flow-increasing jet pump according to claim 11, characterized in that: One end of the valve core facing away from the jet channel is connected to the flow-increasing channel, and the valve core is flippably arranged in the flow-increasing channel, so that the valve core can selectively abut against the valve seat and seal the channel.

18. The flow-increasing jet pump according to claim 11, characterized in that: A limiting member is arranged in the flow increasing channel, and a cavity for the valve core to reciprocate and translate is formed between the limiting member and the valve seat.

19. The flow-increasing jet pump according to claim 18, characterized in that: The valve seat has a fixed seat arranged in the channel, and a gap is provided between the inner wall of the channel and the fixed seat; The valve core includes a sealing plate and a valve stem. The sealing plate is movably arranged in the cavity. The sealing plate has a first state in which it abuts against the valve seat and seals the gap, and a second state in which it abuts against the limit member to open the gap. One end of the valve stem is slidably arranged in the fixed seat, and the other end is connected to the sealing plate to drive the sealing plate to switch between the first state and the second state.

20. The flow-increasing jet pump according to claim 19, characterized in that: The sealing plate has a contact area that contacts the end surface of the valve seat, and the contact area is provided with a first sealing ring.

21. The flow-increasing jet pump according to claim 18, characterized in that: The valve core comprises: The valve core body has a limiting ridge arranged along its circumference, and the limiting ridge has a limiting surface that matches the end surface of the valve seat; and The second sealing ring is arranged on the limiting surface along the circumference of the valve core body.

22. The flow-increasing jet pump according to claim 21, characterized in that: The wall surface surrounding the cavity is provided with a guide piece, and the valve core located in the cavity moves to the valve seat through the guide piece.

23. The flow-increasing jet pump according to claim 11, characterized in that: The flow-increasing jet pump includes a reinforcement member, which is located in the water inlet chamber and is respectively connected to the valve seat and the inner wall of the water inlet chamber. The reinforcement member divides the water inlet chamber into a plurality of chamber units connected to the boost chamber.

24. The flow-increasing jet pump according to any one of claims 1 to 9, characterized in that: It also includes a filtering mechanism arranged at the water inlet.

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