Jet pump with one-way non-return mechanism

Abstract

The utility model provides an injection pump with a one-way non-return mechanism, and relates to the field of injection pumps. The injection pump with the one-way non-return mechanism comprises a jet flow channel and a flow increasing channel, the flow increasing channel is arranged on one side of the jet flow channel, and the flow increasing channel communicates with the diffusion end of the jet flow channel; a one-way non-return mechanism for conducting or blocking flowing of liquid in the flow-increasing channel is arranged in the flow-increasing channel, the one-way non-return mechanism comprises a valve seat and a valve element, the valve seat is installed at the water inlet end of the flow-increasing channel, the valve seat is provided with a channel communicating the flow-increasing channel with the water inlet cavity, and the end face of the end, facing the valve element, of the valve seat is an annular concave face; the diameter of the annular concave surface from the inner edge to the outer edge is gradually increased; the valve element is arranged in the flow increasing channel and provided with an abutting face matched with the annular concave face to selectively seal the channel. According to the injection pump with the one-way non-return mechanism, the sealing performance of the one-way non-return mechanism is optimized and the performance of the injection pump is optimized on the basis that the flow speed which can be achieved to the maximum degree is increased through structural improvement.

Description

Technical Field

[0001] The present application relates to the field of jet pumps, and more particularly, to a jet pump with a one-way check mechanism. Background Art

[0002] A jet pump is a device for transporting liquids, including a motor and a pump body. An inlet, an inlet chamber, a jet channel, a pressurizing chamber, an outlet channel, and an outlet are provided on the pump body. An impeller is provided in the pressurizing chamber. The inlet is connected to the inlet chamber, the inlet chamber is connected to the jet channel, the outlet is connected to the outlet channel, and the pressurizing chamber is respectively connected to the jet channel and the outlet channel. By driving the impeller to rotate at a high speed by the motor, the external water flow sequentially passes through the inlet, the inlet chamber, and the jet channel and enters the pressurizing chamber. After being pressurized by the impeller, a high-pressure water flow is formed and enters the outlet channel, and then is discharged from the outlet. As the fluid inside the impeller is continuously discharged, a low-pressure area is gradually formed at the center of the impeller, even reaching a vacuum. At this time, the fluid at the inlet of the jet pump flows continuously into the impeller through the inlet under the action of atmospheric pressure and is then thrown out by the impeller. In this process, the impeller transfers the mechanical energy of the pump shaft to the fluid, turning it into the pressure energy and kinetic energy of the fluid, and is reflected as the head output of the jet pump.

[0003] Among them, the performance of the jet pump depends on two working parameters, namely the head and the flow rate. The curve relationship diagram between the head and the flow rate is an inverse relationship, that is, when the head is high, the flow rate is small; when the head is low, the flow rate is large. And the flow rate of the jet pump is restricted by the inlet channel. Therefore, the existing jet pump increases the maximum achievable flow velocity by setting a flow-increasing channel.

[0004] Among them, a one-way check mechanism for conducting or blocking the liquid flow in the flow-increasing channel is provided in the flow-increasing channel. When the liquid pressure in the inlet chamber is greater than the liquid pressure in the pressurizing chamber, the one-way check mechanism conducts the flow-increasing channel; when the liquid pressure in the inlet chamber is less than the liquid pressure in the pressurizing chamber, the one-way check mechanism blocks the flow-increasing channel.

[0005] However, the sealing performance of the existing one-way check mechanism needs to be further improved. Summary of the Utility Model

[0006] The purpose of the embodiments of the present application is to provide a jet pump with a one-way check mechanism, which can optimize the sealing performance of the one-way check mechanism and the performance of the jet pump by structural improvement on the basis of increasing the maximum achievable flow velocity.

[0007] The embodiments of the present application provide a jet pump with a one-way check mechanism, which includes an inlet chamber, a pressurizing chamber, a jet channel, and a flow-increasing channel. The flow-increasing channel is provided on one side of the jet channel. Both ends of the jet channel are respectively communicated with the inlet chamber and the pressurizing chamber, and both ends of the flow-increasing channel are respectively communicated with the inlet chamber and the diffusion end of the jet channel;

[0008] A one-way check mechanism is arranged in the flow-increasing channel, and the one-way check mechanism includes a valve seat and a valve core. 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 end face of the valve seat facing the valve core is an annular concave surface, and the diameter from the inner edge to the outer edge of the annular concave surface gradually increases along the fluid flow direction; the valve core is arranged in the flow-increasing channel, and the valve core has an abutting surface that cooperates with the annular concave surface; the valve core is configured as follows: when the liquid pressure of the water inlet chamber is less than the liquid pressure of the boosting chamber, the abutting surface cooperates with the annular concave surface and seals the channel, and when the liquid pressure of the water inlet chamber is greater than the liquid pressure of the boosting chamber, the abutting surface separates from the annular concave surface to conduct the flow-increasing channel.

[0009] The jet pump with a one-way check mechanism provided by the present application (hereinafter referred to as the jet pump) utilizes the flow-increasing channel to be connected with the diffuser section of the jet channel, so that the fluid discharged from 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 water) is improved, thereby increasing the maximum flow rate; on the other hand, through the structural improvement of the one-way check mechanism, the valve seat can be used to limit the valve core, which is beneficial to the liquid pressure in the water inlet chamber being less than that in the pressurization chamber. When the liquid pressure is high, the valve core can selectively abut the valve seat and seal the channel, blocking the flow-increasing channel, and can further limit the valve core from passing through the valve seat, thereby extending the service life of the one-way check mechanism. At the same time, the end face of the valve seat facing the valve core is an annular concave surface, and the abutting surface is a convex surface protruding toward the valve seat. The above-mentioned annular concave surface + convex surface sealing method can effectively increase the contact area between the valve core and the valve seat compared to the flat sealing structure, 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 and improving the performance of the jet pump.

[0010] In some optional embodiments, the valve seat has a limit stopper arranged in the channel, and the limit stopper is used to contact the abutment surface and limit the valve core from penetrating into the valve seat.

[0011] 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.

[0012] In some optional embodiments, the valve core includes an annular elastic support seat and a valve flap.

[0013] 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.

[0014] It can be understood that the function of the elastic support seat is similar to that of an O-ring seal. The setting of the elastic support seat is conducive to improving the sealing effect of the valve flap. When the liquid pressure in the water inlet chamber is less than the liquid pressure in the pressurizing chamber, the high pressure inside the pump body will push the valve flap to turn towards the valve seat, and the valve flap 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 pressurizing chamber, the high pressure inside the pump body will push the valve flap to turn away from the valve seat, thereby quickly opening the flow increasing channel.

[0015] The above-mentioned one-way check mechanism has a simple structure, low manufacturing cost, easy assembly, is not easily damaged during use, and at the same time allows a relatively large size of sediment and the like to pass through, which can reduce the risk of blockage of the flow increasing channel.

[0016] In some alternative embodiments, an elastic connecting portion connected to the elastic support seat is provided at one end of the valve flap facing away from the jet channel.

[0017] Through the setting of the elastic connecting portion, the valve flap can be set to be rotatable within the elastic support seat.

[0018] In some alternative embodiments, the thickness of the elastic connecting portion is respectively less than the thicknesses of the valve flap and the elastic support seat.

[0019] By reducing the thickness of the elastic connecting portion, it is beneficial to improve the folding resistance.

[0020] In some alternative 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 rotatably arranged in the flow increasing channel so that the valve core can selectively abut against the valve seat and seal the channel.

[0021] Under this setting condition, the valve core structure is simple and easy to set, which is beneficial to reducing the manufacturing cost.

[0022] In some alternative embodiments, a limiting member is provided in the flow increasing channel, and a cavity for the valve core to reciprocate horizontally is formed between the limiting member and the valve seat.

[0023] The limiting piece limits the moving stroke of the valve core, preventing the moving path of the valve core from exceeding the limit when the force is relatively large, and making it difficult for the valve core to move to the valve seat when the flow increasing channel is in a blocked state.

[0024] In some alternative 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 rod. The sealing plate is movably arranged in the cavity. The sealing plate has a first state of abutting against the valve seat and sealing the gap, and a second state of abutting against the limiting member to open the gap; one end of the valve rod is slidably penetrated through 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.

[0025] The above-mentioned 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 pressure difference jitter of the spring under a specific pressure; and this solution is convenient to install and has good economy.

[0026] When the fluid enters the water inlet chamber from the water inlet, part of the water enters the flow-increasing channel through the one-way check mechanism, and the other part of the water enters the lower flow-increasing channel, making the water flow rate into the pressurizing chamber increase and the full-open flow rate of the jet pump increase; when the valve at the water outlet is closed or throttled, the high pressure in the pump body cavity pushes the valve stem towards the water inlet direction, and the valve stem drives the sealing plate to move towards the valve seat so that the sealing plate contacts the valve seat, thereby sealing the channel to block the flow-increasing channel and preventing the water from returning through the flow-increasing channel. At this time, the head of the jet pump remains unchanged.

[0027] In some alternative embodiments, the sealing plate has a contact area that abuts against the end face of the valve seat, and a first sealing ring is provided in the contact area.

[0028] Through the setting of the first sealing ring, the sealing plate and the valve seat can be in contact through the first sealing ring, which is beneficial to improving the sealing effect and the blocking effect.

[0029] In some alternative embodiments, the valve core includes a valve core body and a second sealing ring.

[0030] The valve core body has a limiting rib provided along its circumferential direction, and the limiting rib has a limiting surface that cooperates with the end face of the valve seat; the second sealing ring is provided along the circumferential direction of the valve core body on the limiting surface.

[0031] When the fluid enters the water inlet chamber from the water inlet, part of the water enters the flow-increasing channel through the one-way check mechanism, and the other part of the water enters the lower flow-increasing channel, pushing the valve core body to move to the side away from the valve seat until it abuts against the limiting member to open the flow-increasing channel, making the water flow rate into the pressurizing chamber increase and the full-open flow rate of the jet pump increase; when the valve at the water outlet is closed or throttled, the high pressure in the pump body cavity pushes the valve core body towards the water inlet direction, so that the second sealing ring contacts the valve seat, thereby sealing the channel to block the flow-increasing channel and preventing the water from returning through the flow-increasing channel. At this time, the head of the jet pump remains unchanged.

[0032] The above setting has a simple structure and low manufacturing cost.

[0033] In some alternative embodiments, guide vanes are provided on the wall surface enclosing the cavity, and the valve core located in the cavity moves to the valve seat through the guide vanes.

[0034] The setting of the guide vanes can ensure that the valve core can move to the valve seat position stably and reliably, realizing the blocking of the valve seat.

[0035] In some alternative embodiments, the jet pump includes a reinforcing member located in the water inlet chamber. The reinforcing member is connected to the valve seat and the inner wall of the water inlet chamber respectively, and divides the water inlet chamber into a plurality of chamber units communicating with the pressurizing chamber.

[0036] The arrangement of the reinforcing member can not only limit the movement of the valve seat, but also facilitate installation.

[0037] In some alternative embodiments, the jet pump includes a partition wall, and the jet flow channel and the flow increasing channel are located on opposite sides of the partition wall;

[0038] Wherein, the partition wall includes a first section and a second section distributed along the extending direction of the jet flow channel. The second section is located in the diffusion section of the jet flow channel, and the thickness of the second section is less than that of the first section. The fluid outlet for leading out the fluid in the flow increasing channel is opened in the second section.

[0039] Since the jet flow channel and the flow increasing channel are respectively on opposite sides of the partition wall, and the partition wall includes a first section and a second section distributed along the extending direction of the jet flow channel, by controlling the thickness of the second section to be less than that of the first section and opening the fluid outlet for leading out the fluid in the flow increasing channel in the second section, on the one hand, it can alleviate or avoid phenomena such as turbulent flow and eddy current during the fluid passing process. On the other hand, it makes the fluid output from the flow increasing channel flow in a direction almost the same as or close to that of the fluid in the jet flow channel after entering the jet flow channel. This can not only effectively reduce the energy loss caused by the large-angle counterflow of two liquid flows with a large difference in flow velocity after confluence, but also effectively alleviate the fluid disorder caused by the counterflow, avoid the influence of the jet flow channel on increasing the turbulence of the fluid in the flow increasing channel during high-speed jetting, and thus improve the performance of the jet pump.

[0040] In some alternative embodiments, the first section is parallel or tends to be parallel to the axis of the jet flow channel on the surface of the flow increasing channel.

[0041] Through the above 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 confluence with the fluid in the flow increasing channel. It is beneficial to enable the fluid to enter the jet flow channel from the flow increasing channel more uniformly and confluence, reduce energy loss and is beneficial to improving the efficiency of the flow increasing pump.

[0042] In some alternative embodiments, the surface of the second section on the flow increasing channel is closer to the axis of the jet flow channel than the surface of the first section on the flow increasing channel.

[0043] Since the second section is located in the diffusion section of the jet flow channel, through the above design, it is beneficial for the fluid output from the outlet to confluence in a way that is almost the same as or close to the flow direction of the fluid in the jet flow channel, further alleviating the energy loss caused by the counterflow.

[0044] In some alternative embodiments, the first section is located on the surface of the flow increasing channel and the second section is located on the surface of the flow increasing channel, and they are transitioned by a first arc surface which is recessed from the partition wall.

[0045] By transitioning through the above-mentioned first arc surface, it is beneficial to guide and stabilize the fluid flowing from the first section into the second section, improve the flow state of the fluid output from the second section, enable the fluid to enter the flow increasing channel from the outlet more uniformly and converge, thereby being beneficial to improving the efficiency of the jet pump and reducing the vibration of the jet pump.

[0046] In some alternative embodiments, the circumferential dimension of the outlet located in the jet channel gradually increases along the fluid direction; and / or,

[0047] The circumferential dimension of the outlet located in the jet channel first gradually increases along the fluid direction and then remains unchanged.

[0048] Through the above settings, it is beneficial to increase the outlet, enable the fluid entering from the flow increasing channel to converge with the jet channel uniformly, and is beneficial to reducing the adverse impact on the water pressure in the flow increasing channel.

[0049] In some alternative embodiments, on the side of the flow increasing channel away from the partition wall, there are a first wall and a second wall arranged in sequence along the fluid direction. The second wall is parallel 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 of the first wall and the second wall, and the positive projection of the corner along the radial direction of the flow increasing channel is located in the second section.

[0050] By controlling that the positive projection of the corner along the radial direction of the flow increasing channel is located in the second section, it is beneficial for the fluid flowing out from the first wall to enter the second section quickly and smoothly through the limitation and guidance of the corner, and then enter from the outlet at the second end and converge with the fluid in the jet channel, which is beneficial to improving the water flow efficiency.

[0051] In some alternative embodiments, the first wall and the second wall are transitioned by a second arc surface to form a corner, and the second arc surface is recessed into the flow increasing channel.

[0052] Through the above setting that the first wall and the second wall are transitioned by the second arc surface recessed into the flow increasing channel to form a corner, it is beneficial for the fluid flowing out from the first wall to enter the second section stably, quickly and smoothly through the limitation and guidance of the second arc surface, and then enter from the outlet at the second end and converge with the fluid in the jet channel, which is beneficial to improving the water flow efficiency.

[0053] In some alternative embodiments, the cross-sectional area of the flow increasing channel gradually becomes smaller from the side close to the water inlet chamber to the direction close to the outlet.

[0054] With the above settings, it is beneficial to increase the liquid pressure flowing from the flow increasing channel into the pressure increasing chamber.

[0055] In some alternative embodiments, the flow increasing channel is arranged on one side of the jet channel.

[0056] In the one-side arrangement mode, compared with the circumferential arrangement direction, under the condition that the size of the jet pump does not increase, the flow increasing channel can allow larger sizes of particulate matters such as sediment to pass through, preventing blockage.

[0057] In some alternative embodiments, the jet pump has a water inlet and a water outlet. The water inlet chamber is communicated with the water inlet, and the pressure increasing chamber is communicated with the water outlet. The jet pump further includes a filtering mechanism arranged at the water inlet.

[0058] By pre-filtering through the filtering mechanism, channel blockage can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0060] Figure 1 FIG. 21 is a schematic structural diagram of a jet pump with a one-way check mechanism provided in Embodiment 1 of the present application;

[0061] Figure 2 FIG. 25 is a schematic structural diagram of the flow increasing channel of the flow channel body structure provided in Embodiment 1 of the present application in a conducting state from a first perspective;

[0062] Figure 3 FIG. 29 is a schematic structural diagram of the flow increasing channel of the flow channel body structure provided in Embodiment 1 of the present application in a blocked state from a first perspective;

[0063] Figure 4 FIG. 33 is a schematic structural diagram of the flow channel body structure provided in Embodiment 1 of the present application from a second perspective;

[0064] Figure 5 FIG. 37 is an assembly schematic diagram of the valve seat and the jet channel provided in Embodiment 1 of the present application;

[0065] Figure 6 FIG. 41 is a schematic structural diagram of the valve core provided in Embodiment 1 of the present application;

[0066] Figure 7 FIG. 45 is a comparison diagram of the head and flow rate curves of the jet pump before and after flow increase;

[0067] Figure 8 FIG. 49 is a comparison diagram of the flow efficiency curves of the jet pump before and after flow increase;

[0068] Figure 9 It is a schematic structural diagram of the jet pump with a one - way check mechanism provided in Embodiment 2 of the present application;

[0069] Figure 10 It is a schematic structural diagram of the runner body structure provided in Embodiment 3 of the present application;

[0070] Figure 11 It is a schematic structural diagram of the runner body structure provided in Embodiment 4 of the present application;

[0071] Figure 12 It is a schematic structural diagram of the runner body structure provided in Embodiment 5 of the present application.

[0072] Icon: 1000 - jet pump; 11 - pump body; 12 - water inlet; 13 - water outlet; 14 - water inlet chamber; 15 - pressurizing chamber; 16 - runner body structure; 17 - isolation wall; 171 - first section; 172 - second section; 173 - first arc surface; 174 - outlet; 18 - jet flow channel; 19 - flow - increasing channel; 191 - first wall; 192 - second wall; 193 - second arc surface; 194 - limiting member; 195 - guiding piece; 20 - one - way check mechanism; 21 - valve seat; 211 - channel; 212 - limiting stop; 213 - fixing seat; 22 - valve core; 221 - abutting surface; 222 - elastic support seat; 223 - valve flap; 224 - elastic connecting part; 225 - sealing plate; 226 - valve stem; 228 - valve core body; 2281 - limiting convex rib; 229 - second sealing ring; 23 - strengthening member; 24 - filtering mechanism. Detailed Description of the Specific Embodiment

[0073] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0074] 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 that is claimed, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0075] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0076] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of this application are usually placed during use. It is only for the convenience of describing the present application 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 construed as a limitation to the present application. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0077] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0078] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0079] Embodiment 1

[0080] As Figure 1 shown, an injection pump 1000 with a one-way check mechanism includes a pump body 11 having a water inlet 12 and a water outlet 13. An inlet chamber 14, a pressurizing chamber 15, and a flow channel body structure 16 are provided in the pump body 11. An increased flow channel 19 is provided on one side of the jet channel 18. The inlet chamber 14 is communicated with the water inlet 12, and the pressurizing chamber 15 is communicated with the water outlet 13.

[0081] Please refer to Figure 1 , Figure 2 and Figure 3 , where Figure 2 the direction indicated by the arrow in is the fluid flow direction. The flow channel body structure 16 includes a partition wall 17 and a jet channel 18 and an increased flow channel 19 located on opposite sides of the partition wall 17. The two ends of the jet channel 18 are respectively communicated with the inlet chamber 14 and the pressurizing chamber 15, and the two ends of the increased flow channel 19 are respectively communicated with the inlet chamber 14 and the diffuser section of the jet channel 18.

[0082] The setting method in which the flow increasing channel 19 is arranged on one side of the jet channel 18 can allow a larger size of particulate matters such as sediment to pass through the flow increasing channel 19 without increasing the size of the jet pump 1000 compared with the circumferential setting direction, preventing blockage.

[0083] As Figure 1 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 rate, and being convenient for integral molding.

[0084] Among them, the partition wall 17 includes a first section 171 and a second section 172 distributed along the extending direction of the jet channel 18. The second section 172 is located in the diffusion section of the jet channel 18, and the thickness of the second section 172 is smaller than that of the first section 171. The fluid outlet 174 for the flow increasing channel 19 to export fluid is opened on the second section 172.

[0085] It can be understood that since the second section 172 is located in the diffusion section of the jet channel 18 and the fluid outlet 174 for the flow increasing channel 19 to export fluid is opened on the second section 172, that is, the fluid outlet 174 for the flow increasing channel 19 to export fluid is located in the diffusion section of the jet channel 18, so that the fluid exported by the flow increasing channel 19 can converge with the fluid in the flow increasing channel 19 before entering the pressurization chamber 15, which is beneficial to improving the reflux efficiency and increasing the suction lift of the jet pump (that is, the height at which the jet pump sucks up water).

[0086] Since the two opposite sides of the partition wall 17 are the jet channel 18 and the flow increasing channel 19 respectively, and the partition wall 17 includes a first section 171 and a second section 172 distributed along the extending direction of the jet channel 18, by controlling the thickness of the second section 172 to be smaller than that of the first section 171 and opening the fluid outlet 174 for the flow increasing channel 19 to export fluid on the second section 172, on the one hand, the phenomena such as turbulent flow and eddy current during the fluid passing process can be alleviated or avoided, and on the other hand, the fluid output from the flow increasing channel 19 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 impact of two liquid flows with a large difference in flow velocity after confluence, but also effectively alleviate the fluid disorder caused by the impact, avoid the influence of the jet channel 18 on increasing the turbulence of the fluid in the flow increasing channel 19 during high-speed jetting, and thus improve the performance of the jet pump 1000.

[0087] Among them, the first section 171 is parallel or tends to be parallel to the axis of the jet channel 18 on the surface of the flow increasing channel 19.

[0088] It can be understood that being inclined to be parallel means that the angle between the first section 171 and the axial direction of the jet channel 18 on the surface of the flow increasing channel 19 is small. In this application, being inclined to be parallel means that the angle between the first section 171 and the axial direction of the jet channel 18 on the surface of the flow increasing channel 19 is within 20°.

[0089] Through the above settings, it is beneficial to rectify the fluid entering the flow increasing channel 19 from the water inlet chamber 14, and after improving the flow state of the fluid, it converges with the fluid in the flow increasing channel 19. This is beneficial to enable the fluid to enter the flow increasing channel 19 from the guide outlet 174 more uniformly and converge, reducing energy loss and being beneficial to improving the efficiency of the flow increasing pump.

[0090] As Figure 2 and Figure 3 shown, the second section 172 on the surface of the flow increasing channel 19 is closer to the axis of the jet channel 18 than the first section 171 on the surface of the flow increasing channel 19.

[0091] Since the second section 172 is located in the diffusion section of the jet channel 18, through the above design, it is beneficial for the fluid output from the guide outlet 174 to converge in a manner that is almost the same as or similar to the flow direction of the fluid in the jet channel 18, further alleviating the energy loss caused by the head-on collision.

[0092] Wherein, the surface of the first section 171 on the flow increasing channel 19 and the surface of the second section 172 on the flow increasing channel 19 can be transitioned through a plane or through an arc surface.

[0093] As Figure 2 and Figure 3 shown, in this embodiment, the surface of the first section 171 on the flow increasing channel 19 and the surface of the second section 172 on the flow increasing channel 19 are transitioned through the first arc surface 173, and the first arc surface 173 is recessed in the partition wall 17.

[0094] That is to say, the surface of the first section 171 on the flow increasing channel 19 and the surface of the second section 172 on the flow increasing channel 19 are transitioned through the first arc surface 173 that is concave in the partition wall 17.

[0095] The transition described here can also be understood as connection or engagement. The surface of the first section 171 on the flow increasing channel 19 and the surface of the second section 172 on the flow increasing channel 19 are not parallel as a whole. The transition through the first arc surface 173 is beneficial for guiding and stabilizing the flow of 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, enabling the fluid to enter the flow increasing channel 19 from the guide outlet 174 more uniformly and converge, thereby being beneficial to improving the efficiency of the jet pump 1000 and reducing the vibration of the jet pump 1000.

[0096] As shown Figure 4 in this embodiment, the circumferential dimension of the outlet 174 in the jet channel 18 gradually increases along the fluid direction; or

[0097] the circumferential dimension of the outlet 174 in the jet channel 18 first gradually increases along the fluid direction and then remains unchanged. That is, at this time, the positive projection of the outlet 174 on the horizontal plane where the axis of the jet channel 18 is located is in a V-like shape, or the positive projection from the starting part along the jet direction is in a V-like shape.

[0098] Through the above settings, it is beneficial to increase the outlet 174, so that the fluid entering from the flow increasing channel 19 can uniformly converge with the jet channel 18, and it is beneficial to reduce the adverse impact on the water pressure in the flow increasing channel 19.

[0099] Furthermore, according to Figure 2 and Figure 3 it can be seen that on the side of the flow increasing channel 19 facing away from the isolation wall 17, there are 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. The connection between the first wall 191 and the second wall 192 forms a corner, and the positive projection of the corner along the radial direction of the flow increasing channel 19 is located in the second section 172.

[0100] 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 this 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°.

[0101] It should be noted that the cross-sectional shape of the flow increasing channel 19 can be circular, elliptical, polygonal, etc. Usually, the cross-sectional shape of the flow increasing channel 19 is circular. Here, the first wall 191 and the second wall 192 define the contour shape of the side of the flow increasing channel 19 facing away from the isolation wall 17.

[0102] It can be understood that since a corner is formed at the connection between the first wall 191 and the second wall 192, and the second wall 192 is closer to the axis of the jet channel 18 than the first wall 191, therefore, the side of the flow increasing channel 19 facing away from the isolation wall 17 is arranged in an S-like shape.

[0103] By controlling that the positive projection of the corner along the radial direction of the flow increasing channel 19 is located in the second section 172, it is beneficial for the fluid flowing out from the first wall 191 to quickly and smoothly enter the second section 172 through the limitation and guidance of the corner, and then enter through the outlet 174 at the second end and converge with the fluid in the jet channel 18, which is beneficial to improving the water flow efficiency.

[0104] The first wall 191 and the second wall 192 are transitioned through the second arc surface 193 to form a corner, and the second arc surface 193 is recessed into the flow increasing channel 19.

[0105] Through the above arrangement where the first wall 191 and the second wall 192 are transitioned through the second arc surface 193 recessed into the flow increasing channel 19 to form a corner, it is beneficial for the fluid flowing out from the first wall 191 to smoothly, quickly and successfully enter the second section 172 through the limitation and guidance of the second arc surface 193, and then enter through the outlet 174 at the second end and converge with the fluid in the jet channel 18, which is beneficial to improving the water flow efficiency.

[0106] It can be understood that in the direction from the side close to the water inlet chamber 14 to the side close to the outlet 174, the cross-sectional area of the flow increasing channel 19 can remain unchanged or gradually decrease.

[0107] As Figures 1 to 3 shown, in this embodiment, in the direction from the side close to the water inlet chamber 14 to the side close to the outlet 174, the cross-sectional area of the flow increasing channel 19 gradually decreases.

[0108] Through the above arrangement, it is beneficial to increase the liquid pressure of the liquid flowing from the flow increasing channel 19 into the pressurizing chamber 15.

[0109] It should be noted that the shape of the cross-section of the flow increasing channel 19 includes but is not limited to circular, oval or polygonal, 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 circular.

[0110] Please continue to refer to Figures 1 to 3 , a one-way check mechanism 20 for conducting or blocking the liquid flow in the flow increasing channel 19 is provided in the flow increasing channel 19. When the liquid pressure in the water inlet chamber 14 is greater than the liquid pressure in the pressurizing chamber 15, as Figure 2 shown, the one-way check mechanism 20 conducts the flow increasing channel 19; when the liquid pressure in the water inlet chamber 14 is less than the liquid pressure in the pressurizing chamber 15, as Figure 3 shown, the one-way check mechanism 20 blocks the flow increasing channel 19.

[0111] When the jet pump 1000 is in a low head and large flow working state, the liquid pressure in the water inlet chamber 14 is greater than the liquid pressure in the pressurizing chamber 15, and the one-way check mechanism 20 conducts the flow increasing channel 19, so that the water inlet flow between the water inlet chamber 14 and the pressurizing chamber 15 increases, effectively increasing the upper limit value of the jet pump flow. When the pump body 11 is in a high head and small flow working state, the liquid pressure in the water inlet chamber 14 is less than the liquid pressure in the pressurizing chamber 15, and the one-way check mechanism 20 blocks the flow increasing channel 19, so that the water inlet flow between the water inlet chamber 14 and the pressurizing chamber 15 decreases, effectively increasing the upper limit value of the jet pump head.

[0112] That is, by additionally providing a flow increasing channel 19 between the water inlet chamber 14 and the pressurizing chamber 15, and by means of a one-way check mechanism 20 to control the on or off of the liquid flow in the flow increasing channel 19 according to the pressure change between the pressurizing chamber 15 and the water inlet chamber 14 in the pump body 11, the curve relationship diagram of the flow rate and head of the jet pump is optimized, the performance of the jet pump 1000 is significantly improved, and at the same time, it is ensured that the liquid does not flow back through the flow increasing channel 19.

[0113] Specifically, as Figure 2 shown, the one-way check mechanism 20 includes a valve seat 21 and a valve core 22.

[0114] The one-way check mechanism 20 includes a valve seat 21 and a valve core 22. The valve seat 21 is installed at the water inlet end of the flow increasing channel 19. The valve seat 21 has a channel 211 communicating the flow increasing channel 19 and the water inlet chamber 14. The end face of the valve seat 21 facing the valve core 22 is an annular concave surface. Along the fluid flow direction, the diameter from the inner edge to the outer edge of the annular concave surface gradually increases; the valve core 22 is arranged in the flow increasing channel 19, and the valve core 22 has an abutting surface 221 that cooperates with the annular concave surface; the valve core 22 is configured such that when the liquid pressure in the water inlet chamber 14 is less than the liquid pressure in the pressurizing chamber 15, the abutting surface 221 cooperates with the annular concave surface to seal the channel 211, and when the liquid pressure in the water inlet chamber 14 is greater than the liquid pressure in the pressurizing chamber 15, the abutting surface 221 disengages from the annular concave surface to open the flow increasing channel 19.

[0115] Through the structural improvement of the one-way check mechanism 20, the valve seat 21 can be used to limit the valve core 22. When the liquid pressure in the water inlet chamber 14 is less than the liquid pressure in the pressurizing chamber 15, it is beneficial for the valve core 22 to selectively abut against the valve seat 21 and seal the channel 211 to block the flow increasing channel 19, and the valve core 22 can be further restricted from passing through the valve seat 21, prolonging the service life of the one-way check mechanism 20. At the same time, the end face of the valve seat 21 facing the valve core 22 is an annular concave surface, and at this time, the abutting surface 221 is a convex surface protruding towards the valve seat 21. By using the above-mentioned annular concave surface + convex surface sealing method, compared with the flat sealing structure, the contact area between the valve core 22 and the valve seat 21 can be effectively increased, the sealing effect is better, the fluid will not flow back through the flow increasing channel 19, avoiding the leakage of the pump internal pressure, and improving the performance of the jet pump 1000.

[0116] 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 face of the valve seat 21 facing the valve core 22 can serve as a limiting surface to a certain extent to limit the valve core 22 from passing through the valve seat 21, resulting in the failure of the one-way check mechanism 20 and the inability to realize the functions of blocking and opening the flow increasing channel 19.

[0117] As Figure 2 andFigure 3 As shown, in this embodiment, the abutting surface 221 is a spherical surface.

[0118] Compared with the planar sealing structure, the spherical sealing method can effectively increase the contact area between the valve core 22 and the annular concave surface of 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.

[0119] Further based on 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 valve core 22 has an abutting surface 221 . The limit stopper is used to contact the abutting surface 221 and limit the valve core 22 from penetrating into the valve seat 21 .

[0120] It is understandable that, since the stopper is used to contact the abutment surface 221 and limit the valve core 22 from penetrating into the valve seat 21, the side of the stopper facing the valve core 22 should be adjusted according to the difference of the abutment surface 221 so that the shapes of the two match. For example, when the abutment surface 221 is a spherical surface convex toward one side of the valve core 22, the side of the stopper facing the valve core 22 should be a concave surface matching the spherical surface.

[0121] 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.

[0122] Exemplarily, the stopper may be a plurality of first stop plates spaced apart along the circumference of the channel 211 .

[0123] 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.

[0124] 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.

[0125] 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 .

[0126] The elastic support seat 222 is embedded in the flow-increasing channel 19; one end of the valve flap 223 facing away from the jet channel 18 is connected to the elastic support seat 222, and the valve flap 223 is rotatably arranged in the elastic support seat 222 so that the valve flap 223 can selectively abut against the elastic support seat 222 and the valve seat 21 to seal the channel 211.

[0127] The elastic support seat 222 is embedded in the flow-increasing channel 19 in the following way: an installation groove is provided along the circumferential direction of the flow-increasing channel 19, and the elastic support seat 222 is embedded in the installation groove and is in interference fit with the installation 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 here.

[0128] It can be understood that the function of the elastic support seat 222 is similar to that of an O-ring. The setting of the elastic support seat 222 is beneficial to improving the sealing effect of the valve flap 223. When the liquid pressure in the water inlet chamber 14 is less than the liquid pressure in the pressurizing chamber 15, the high pressure inside the pump body 11 will push the valve flap 223 to turn towards 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 in the water inlet chamber 14 is less than the liquid pressure in the pressurizing chamber 15, the high pressure inside the pump body 11 will push the valve flap 223 to turn away from the valve seat 21, thereby quickly opening the flow-increasing channel 19.

[0129] It can be understood that at this time, the surface of the valve flap 223 facing the valve seat 21 serves as the abutting surface 221.

[0130] The above-mentioned one-way check mechanism 20 has a simple structure, low manufacturing cost, easy assembly, is not easily damaged during use, and at the same time allows a relatively large size of sediment and the like to pass through, which can reduce the risk of blockage of the flow-increasing channel 19.

[0131] As Figure 6 shown, one end of the valve flap 223 facing away from the jet channel 18 is provided with an elastic connection part 224 connected to the elastic support seat 222.

[0132] Through the setting of the elastic connection part 224, the valve flap 223 is rotatably arranged in the elastic support seat 222.

[0133] Among them, the valve flap 223 can also be made of an elastic material, or made of other materials, or made of rubber doped with reinforcing fibers.

[0134] In this embodiment, the valve flap 223 is made of an elastic material, and the valve flap 223, the elastic connection part 224 and the elastic support seat 222 are integrally formed.

[0135] Among them, the thickness of the elastic connection part 224 can be the same as or different from the thicknesses of the valve flap 223 and the elastic support seat 222.

[0136] As Figure 6 shown, the thickness of the elastic connection part 224 is respectively smaller than the thicknesses of the valve flap 223 and the elastic support seat 222.

[0137] By thinning the thickness of the elastic connection part 224, it is beneficial to improve the folding resistance.

[0138] As Figure 2 shown, the jet pump 1000 includes a reinforcing member 23. The reinforcing member 23 is located in the water inlet chamber 14. The reinforcing member 23 is respectively connected to the valve seat 21 and the inner wall of the water inlet chamber 14. The reinforcing member 23 divides the water inlet chamber 14 into a plurality of chamber units communicating with the pressurizing chamber 15.

[0139] The setting of the reinforcing member 23 can not only limit the movement of the valve seat 21, but also is convenient for installation.

[0140] Optionally, the reinforcing member 23 is integrally formed with the pump body 11.

[0141] Among them, after using the jet pump 1000 provided in Embodiment 1 for flow increase, taking the jet pump that only differs from Embodiment 1 in that the flow increasing channel 19 is not provided as before the flow increase, the performance of the jet pump before and after the flow increase is tested, and the results are as Figure 7 and Figure 8 shown. Figure 7 is a comparison chart of the head and flow rate curves of the jet pump before and after the flow increase ( Figure 7 in which the abscissa is the flow rate and the ordinate is the head); Figure 8 is a comparison chart of the flow efficiency curves of the jet pump before and after the flow increase. According to Figure 7 and Figure 8 , the performance of the jet pump can be significantly improved after the flow increase compared with before the flow increase.

[0142] Embodiment 2

[0143] The main difference between it and Embodiment 1 is that: as Figure 9 shown, a filtering mechanism 24 is provided at the water inlet 12 of the jet pump 1000. The filtering mechanism 24 includes but is not limited to a filter screen, a filter element, etc.

[0144] At this time, the runner body structure 16 is inverted in the pump body 11. 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.

[0145] Embodiment 3

[0146] The main difference between it and Embodiment 1 is the difference in the valve core 22.

[0147] As Figure 10As shown, one end of the valve core 22 facing away from the jet channel 18 is connected to the flow increasing channel 19, and the valve core 22 is rotatably 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.

[0148] Under this setting condition, the structure of the valve core 22 is simple and easy to set, which is beneficial to reducing the manufacturing cost. At the same time, the size of sediment and the like that can pass through is relatively large, which can reduce the risk of blockage of the flow increasing channel 19.

[0149] Exemplarily, the material of the valve core 22 is 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.

[0150] Exemplarily, one end of the valve core 22 facing 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.

[0151] Among them, as Figure 10 shown, the abutting surface 221 of the valve core 22 is a spherical surface.

[0152] Adopting the above spherical surface sealing method, compared with the plane sealing structure, it 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, avoiding the leakage of the pressure inside the pump.

[0153] Embodiment 4

[0154] The main difference between it and Embodiment 1 lies in the different limit members 194 and one-way check mechanism 20 provided in the flow increasing channel 19.

[0155] As Figure 11 shown, a limit 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 limit member 194 and the valve seat 21.

[0156] The limit piece limits the moving stroke of the valve core 22 to prevent the moving path of the valve core 22 from exceeding the limit when the force is large, and it is difficult for the valve core 22 to move to the valve seat 21 when the flow increasing channel 19 should be blocked.

[0157] Among them, the limit member 194 can be a continuous or discontinuous limit plate arranged along the circumferential direction of the flow increasing channel 19, and each limit plate extends along the circumferential direction of the flow increasing channel 19, and a limit member 194 is formed between the limit plate and the inner wall of the flow increasing channel 19.

[0158] In order to reduce the influence of the limit member 194 on the flow rate and flow of the fluid in the flow increasing channel 19, and at the same time have a certain guiding effect on the fluid, as Figure 11 shown, the limit member 194 is a plurality of limit plates extending along the extending direction of the flow increasing channel 19, and the plurality of limit plates are arranged at intervals along the circumferential direction of the flow increasing channel 19.

[0159] The valve seat 21 has a fixing seat 213 disposed in the channel 211, and there is a gap between the inner wall of the channel 211 and the fixing seat 213. The valve core 22 includes a sealing plate 225 and a valve stem 226. The sealing plate 225 is movably disposed in the cavity. The sealing plate 225 has a first state in which it abuts against the valve seat 21 and seals the gap, and a second state in which it abuts against the limiting member 194 to open the gap. One end of the valve stem 226 is slidably inserted through the fixing 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.

[0160] The above-mentioned one-way check mechanism 20 has a simple structure, does not require a spring, and relies on the pressure difference between the water outlet 13 and the water inlet 12 of the pump body 11 to realize the opening and closing of the flow increasing channel 19, effectively solving the noise caused by the pressure difference jitter of the spring under a specific pressure. And this solution is convenient for installation and has good economy.

[0161] 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 lower flow increasing channel 19, so that the water flow rate entering the pressurizing chamber 15 becomes larger, and the full-open flow rate of the jet pump 1000 becomes larger. When the valve at the water outlet 13 is closed or reduced, the high pressure in the pump body 11 cavity pushes the valve stem 226 to move towards the water inlet 12. The valve stem 226 drives the sealing plate 225 to move towards the valve seat 21 so that the sealing plate 225 contacts the valve seat 21, thereby sealing the channel 211 to block the flow increasing channel 19 and preventing the water from returning through the flow increasing channel 19. At this time, the head of the jet pump remains unchanged.

[0162] Please continue to refer to Figure 11 , the sealing plate 225 has an abutting area that abuts against the end face of the valve seat 21, and a first sealing ring (not shown in the figure) is provided in the abutting area.

[0163] At this time, the surface of the first sealing ring facing the valve seat 21 serves as the abutting surface 221.

[0164] Through the setting of the first sealing ring, the sealing plate 225 and the valve seat 21 can be in contact with each other through the first sealing ring, which is beneficial to improving the sealing effect and the blocking effect.

[0165] Embodiment 5

[0166] The main difference from Embodiment 4 lies in the difference in the one-way check mechanism 20.

[0167] As Figure 12 shown, the valve core 22 includes a valve core body 228 and a second sealing ring 229.

[0168] The valve core body 228 has a limiting rib 2281 arranged along its circumferential direction, and the limiting rib 2281 has a limiting surface that cooperates with the end surface of the valve seat 21; the second sealing ring 229 is arranged along the circumferential direction of the valve core body 228 on the limiting surface.

[0169] It can be understood that at this time, the surface of the second sealing ring 229 facing the valve seat 21 serves as the abutting surface 221.

[0170] 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 through the one-way check mechanism 20, and another part of the water enters the lower flow increasing channel 19, pushing the valve core body 228 to move to the side away from the valve seat 21 until it abuts against the limiting member 194 to open the flow increasing channel 19, so that the water flow rate entering the pressure increasing chamber 15 becomes larger, and the full open flow rate of the jet pump 1000 becomes larger; when the valve at the water outlet 13 is closed or throttled, the high pressure in the cavity of the pump body 11 pushes the valve core body 228 to move towards 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 the water no longer returns through the flow increasing channel 19. At this time, the head of the jet pump remains unchanged.

[0171] The above setting has a simple structure and low manufacturing cost.

[0172] As Figure 12 shown, the wall surface enclosing the cavity is provided with guide vanes 195, and the valve core 22 in the cavity moves to the valve seat 21 through the guide vanes 195.

[0173] The setting of the guide vanes 195 can ensure that the valve core 22 can move to the position of the valve seat 21 stably and reliably, realizing the blockage of the valve seat 21.

[0174] Among them, the number of the guide vanes 195 is multiple, and the multiple guide vanes 195 are arranged at intervals along the circumferential direction of the cavity. Here, the multiple includes but is not limited to 2, 3, 4, etc. In this embodiment, the number of the guide vanes 195 is 3, and the 3 guide vanes 195 are arranged at equal intervals along the circumferential direction of the cavity.

[0175] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. 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 with a one-way check mechanism, characterized in that, It comprises a water inlet chamber, a pressure-boosting chamber, a jet channel and a flow-increasing channel, wherein the flow-increasing channel is arranged on a single side of the jet channel, and the two ends of the jet channel are respectively connected to the water inlet chamber and the pressure-boosting chamber, and the two ends of the flow-increasing channel are respectively connected to the water inlet chamber and the diffusion end of the jet channel; A one-way check mechanism is arranged in the flow-increasing channel, and the one-way check mechanism comprises a valve seat and a valve core. 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 end surface of the valve seat facing the valve core is an annular concave surface, and the diameter of the annular concave surface gradually increases from the inner edge to the outer edge along the fluid flow direction; the valve core is arranged in the flow-increasing channel, and the valve core has an abutting surface matched with the annular concave surface; The valve core is configured as follows: when the liquid pressure of the water inlet chamber is less than the liquid pressure of the boost chamber, the abutment surface cooperates with the annular concave surface and seals the channel; when the liquid pressure of the water inlet chamber is greater than the liquid pressure of the boost chamber, the abutment surface disengages from the annular concave surface to open the flow-increasing channel.

2. The jet pump with a one-way check mechanism according to claim 1, characterized in that, The valve seat has a limit stopper arranged in the channel, and the limit stopper is used to contact the abutment surface and limit the valve core from penetrating into the valve seat.

3. The jet pump with a one-way check mechanism according to claim 1 or 2, 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.

4. The jet pump with a one-way check mechanism according to claim 3, 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.

5. The jet pump with a one-way check mechanism according to claim 4, 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.

6. The jet pump with a one-way check mechanism according to claim 1 or 2, 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.

7. The jet pump with a one-way check mechanism according to claim 1 or 2, 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.

8. The jet pump with a one-way check mechanism according to claim 7, 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.

9. The jet pump with a one-way check mechanism according to claim 8, 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.

10. The jet pump with a one-way check mechanism according to claim 7, 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.

11. The jet pump with a one-way check mechanism according to claim 10, characterized in that, The wall surface enclosing the cavity is provided with guide vanes, and the valve core located within the cavity moves to the valve seat through the guide vanes.

12. The jet pump with a one-way check mechanism according to claim 1 or 2, characterized in that, The jet pump with a one-way check mechanism includes a reinforcing member, which is located within the water inlet chamber. The reinforcing member is respectively connected to the valve seat and the inner wall of the water inlet chamber, and the reinforcing member divides the water inlet chamber into a plurality of chamber units communicating with the pressurizing chamber.

13. The jet pump with a one-way check mechanism according to claim 1 or 2, characterized in that, It includes a partition wall, and the jet flow channel and the flow increasing channel are located on opposite sides of the partition wall; Among them, the partition wall includes a first section and a second section distributed along the extension direction of the jet flow channel. The second section is located in the diffuser section of the jet flow channel, and the thickness of the second section is less than that of the first section. The flow increasing channel is used for the fluid outlet opening to be provided on the second section.

14. The jet pump with a one-way check mechanism according to claim 13, characterized in that, The first section is parallel or tends to be parallel to the axis of the jet flow channel on the surface of the flow increasing channel.

15. The jet pump with a one-way check mechanism according to claim 13, characterized in that, Compared with the first section on the surface of the flow increasing channel, the second section on the surface of the flow increasing channel is closer to the axis of the jet flow channel.

16. The jet pump with a one-way check mechanism according to claim 15, characterized in that, The surface of the first section on the flow increasing channel and the surface of the second section on the flow increasing channel are transitioned by a first arc surface, and the first arc surface is recessed in the partition wall.

17. The jet pump with a one-way check mechanism according to claim 13, characterized in that, The circumferential dimension of the jet flow channel where the outlet is located gradually increases along the fluid direction; or, The circumferential dimension of the jet flow channel where the outlet is located first gradually increases along the fluid direction and then remains unchanged.

18. The jet pump with a one-way check mechanism according to claim 13, characterized in that, On the side of the flow increasing channel away from the partition wall, there are a first wall and a second wall arranged in sequence along the fluid direction. The second wall is parallel or tends to be parallel to the axis of the jet flow channel, and the second wall is closer to the axis of the jet flow channel than the first wall. A corner is formed at the connection between the first wall and the second wall, and the positive projection of the corner along the radial direction of the flow increasing channel is located on the second section.

19. The jet pump with a one-way check mechanism according to claim 18, characterized in that, The first wall and the second wall are transitioned by a second arc surface to form the corner, and the second arc surface is recessed into the flow increasing channel.

20. The jet pump with a one-way check mechanism according to claim 13, characterized in that, From the side close to the water inlet chamber to the direction close to the outlet, the cross-sectional area of the flow increasing channel gradually becomes smaller.

21. The jet pump with a one-way check mechanism according to claim 1 or 2, characterized in that, The jet pump with a one-way check mechanism has a water inlet and a water outlet. The water inlet chamber is communicated with the water inlet, and the pressurizing chamber is communicated with the water outlet; The jet pump with a one-way check mechanism further includes a filtering mechanism provided at the water inlet.

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