Water flow switch directly mounted to waterway

Abstract

The utility model relates to a water flow switch directly installed in water channel, including the valve core and spring in the pipe body and being equipped with the pipe body, the water inlet and the water outlet are equipped on the pipe body, the water inlet is used for communicating with the pump body, the valve core includes the plug, the limiting portion and the valve stem that set up in proper order and are linked, its characterized in that, the water inlet of pipe body is equipped with the connecting portion for being linked with the pump body, the baffle is equipped along its radial in the pipe body, the baffle is equipped with the through hole that will link the water inlet and the water outlet, the limiting ring is equipped on the valve stem, the limiting ring can be opposite the axial fixedness of pipe body, the valve stem can be opposite the axial movement of limiting ring, the end face of limiting portion towards the baffle can be opposite the baffle, the spring one end is opposite the limiting ring, the other end is opposite the limiting portion, the plug keeps the tendency of being set in the through hole to block the through hole under the action of spring, the plug can remove from the through hole under the action of water flow, and the assembly is convenient.

Description

Technical Field

[0001] This utility model relates to the field of water flow switch technology, specifically to a water flow switch that can be directly installed in a waterway. Background Technology

[0002] A canned motor pump is a device that uses a high-speed rotating impeller to increase the pressure of a liquid by applying energy through centrifugal force. For example, the Chinese utility model patent disclosed in patent application number CN201920864404.3 (publication number CN210218146U), entitled "DC Permanent Magnet Canned Boost Pump with Water Flow Controlled Start and Forced Start," includes an upper shell; a lower shell connected to the lower part of the upper shell, having an inlet, a chamber, and an outlet, the inlet being connected to the outlet through the chamber; a motor, including a stator and a rotor; a shielding sleeve located inside the upper shell, with multiple stators stacked sequentially from top to bottom between the inner wall of the upper shell and the outer wall of the shielding sleeve, the rotor located inside the shielding sleeve and having a gap between it and the shielding sleeve; a pipe body connected to the inlet or outlet of the lower shell; a water flow switch assembly located inside the pipe body, used to sense the fluid flow inside the pipe body to control the start and stop of the motor; and a forced start switch, which can force the motor to start after manual triggering.

[0003] This patent involves installing a sleeve in the outlet of the pump body's lower casing. The outlet is opened or closed by the engagement of the valve core of the flow switch assembly with the through hole of the sleeve. In other words, the valve core needs to extend into the pump body to control the flow. This makes installation rather cumbersome, requiring the flow switch assembly to be installed in the pipe first, followed by connecting the pipe to the pump body and ensuring the valve core mates with the through hole of the sleeve. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a water flow switch that is simple and convenient to assemble and can be directly installed in the waterway, so that the valve core of the water flow switch can control the water flow without having to extend into the pump body.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a water flow switch directly installed in a waterway, including a pipe body and a valve core and a spring disposed in the pipe body. The pipe body is provided with an inlet and an outlet. The inlet is used to connect with a pump body. The valve core includes a plug, a limiting part and a valve stem arranged and connected in sequence. The feature is that the inlet of the pipe body is provided with a connecting part for connecting with the pump body. A partition is provided in the pipe body along its radial direction. The partition is provided with a through hole connecting the inlet and the outlet.

[0006] A limiting ring is fitted on the valve stem. The limiting ring can be fixed axially relative to the pipe body, and the valve stem can move axially relative to the limiting ring.

[0007] The end face of the limiting part facing the partition can abut against the partition, one end of the spring abuts against the limiting ring, and the other end abuts against the limiting part;

[0008] The plug is kept inserted in the through hole by the action of the spring to block the through hole, and the plug can be moved out of the through hole by the action of water flow.

[0009] To facilitate the installation of the limiting ring in the pipe body, the limiting ring includes an annular body fitted onto the valve stem and a protrusion formed on the peripheral wall of the annular body. The inner peripheral wall of the pipe body has a strip-shaped groove extending axially. One end of this groove passes through the outlet, and the other end extends circumferentially along the pipe body to form a limiting groove. The protrusion can slide along the strip-shaped groove to the other end and then rotate and be limited within the limiting groove. First, the limiting ring is fitted onto the valve stem. Then, during installation, the valve core moves axially along the pipe body. During this process, the protrusion slides along the limiting groove. When the protrusion can slide along the strip-shaped groove to the other end, the valve stem is rotated, and the protrusion enters the limiting groove, thus limiting the limiting ring relative to the axial direction of the pipe body.

[0010] To ensure the plug can seal or open the through hole, the limiting groove has a certain length along the axial direction of the pipe body, and the protrusion can abut against one of the side walls of the limiting groove. This also allows the limiting ring a certain amount of movement along the axial direction of the pipe body, increasing the overall travel of the valve core along the axial direction and ensuring the plug can seal or open the through hole.

[0011] To prevent the spring from shifting radially and affecting the elastic force applied to the valve core, the limiting ring has multiple limiting blocks spaced circumferentially on its end face facing the partition. The spring is limited radially within the area enclosed by the multiple limiting blocks to limit the spring in its radial direction.

[0012] To prevent relative displacement between the limiting ring and the valve core in the circumferential direction, the limiting ring has a lateral hole on the periphery of its annular area that communicates with the annular area. The valve stem has a rib on its peripheral wall, which is embedded in the lateral hole. The cooperation between the rib and the lateral hole positions the limiting ring and the valve core in the circumferential direction.

[0013] Preferably, the rib extends along the axial direction of the valve stem, so that after the protrusion slides along the groove to the other end of the groove, force can be applied to the rib to make the valve core drive the limiting ring to rotate.

[0014] In the above scheme, the valve core is provided with a magnetic component, and the tube body is provided with a trigger component that can conduct or disconnect with the magnetic component.

[0015] The connecting part can have various structural forms. The simplest connecting part is the threaded part.

[0016] Preferably, it also includes a housing, through which the pipe passes axially and is fixed relative to the housing. The inlet and outlet of the pipe are located outside the housing. Electrical components and wiring terminals are provided on the housing, further enabling the flow switch to operate relatively independently.

[0017] Compared with the prior art, the advantages of this utility model are as follows: By setting a baffle with a through hole in the pipe body and fitting a limiting ring on the valve stem, the valve core and spring can be directly installed in the pipe body. When it is needed to be used with the pump body, the pipe body can be connected to the pump body. The flow of water in the pump body is controlled by the opening and closing of the through hole of the baffle through the valve core. Compared with the existing method of first installing the valve core in the pipe body, connecting the pipe body to the pump body, and then inserting the valve body into the pump body to control the opening and closing of the outlet, the assembly of this utility model is convenient. In addition, the water flow switch of this utility model is relatively independent of the pump body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 A sectional view of the box body removed;

[0020] Figure 3 for Figure 1 A cross-sectional view of the box body from another direction;

[0021] Figure 4 for Figure 1 A cross-sectional view of the box body from another direction;

[0022] Figure 5 for Figure 2 A schematic diagram of the valve core and the limiting ring. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be understood that, unless otherwise stated, "multiple" means two or more, and the terms "upper," "lower," "left," "right," "top," "bottom," "front," "rear," etc., indicate the orientation or positional relationship based on the direction or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an adhesive connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model patent based on the specific circumstances.

[0026] like Figures 1-5 As shown, the water flow switch directly installed in the waterway in this preferred embodiment includes a housing 1, a pipe 2, and a valve core 3 and a spring 4 disposed in the pipe 2. The pipe 2 is provided with an inlet 21 and an outlet 22. In this embodiment, the pipe 2 is open at both ends, with one end being the inlet 21 and the other end being the outlet 22. The inlet 21 is used to connect with the pump body. The valve core 3 includes a plug 31, a limiting part 32, and a valve stem 33 arranged and connected in sequence. The valve core 3 is provided with a magnetic element, and the pipe 2 is provided with a trigger element that can conduct or disconnect with the magnetic element.

[0027] The above are existing technologies, and will not be elaborated further here.

[0028] A baffle 23 is provided in the radial direction of the pipe body 2, and a through hole 24 is provided on the baffle 23 to connect the inlet 21 and the outlet 22.

[0029] A limiting ring 5 is fitted on the valve stem 33. The limiting ring 5 can be fixed axially relative to the pipe body 2, and the valve stem 33 can move axially relative to the limiting ring 5. The limiting ring 5 includes an annular body 51 fitted on the valve stem 33 and a protrusion 52 formed on the peripheral wall of the annular body 51. A strip groove 25 extending axially is provided on the inner peripheral wall of the pipe body 2. One end of the strip groove 25 passes through the outlet 22, and the other end extends circumferentially along the pipe body 2 to form a limiting groove 26. The protrusion 52 can slide along the strip groove 25 to the other end of the strip groove 25 and then rotate and be limited in the limiting groove 26. The strip groove 25 and the limiting groove 26 together form an L-shaped groove.

[0030] First, the limiting ring 5 is fitted onto the valve stem 33. Then, during installation, the valve core 3 moves along the axial direction of the pipe body 2. During this process, the protrusion 52 slides along the limiting groove 26. When the protrusion 52 slides along the strip groove 25 to the other end of the strip groove 25, the valve stem 33 is rotated, and the protrusion 52 enters the limiting groove 26, so that the limiting ring 5 can be axially limited relative to the pipe body 2.

[0031] In this embodiment, as Figure 4 As shown, the limiting groove 26 has a certain length along the axial direction of the pipe body 2, and the protrusion 52 can abut against one of the side walls of the limiting groove 26. In this way, the limiting ring 5 also has a certain amount of movement along the axial direction of the pipe body 2, which increases the overall movement stroke of the valve core 3 along the axial direction of the pipe body 2, ensuring that the plug 31 can block or open the through hole 24.

[0032] The end face a of the limiting part 32 facing the partition 23 can abut against the partition 23. One end of the spring 4 abuts against the limiting ring 5 and the other end abuts against the limiting part 32. Under the action of the spring 4, the plug 31 is kept in the through hole 24 to block the through hole 24. The plug 31 can be moved out of the through hole 24 under the action of water flow.

[0033] To prevent the spring 4 from shifting radially and affecting the elastic force applied to the valve core 3, the annular body 51 of the limiting ring 5 is provided with a plurality of limiting blocks 53 spaced circumferentially on the end face of the limiting plate 23. The spring 4 is limited in the area enclosed by the plurality of limiting blocks 53 along the radial direction of the limiting ring 5, so as to limit the spring 4 in its radial direction.

[0034] In addition, the limiting ring 5 has a lateral hole 54 that communicates with the annular region 55 on its periphery, and the valve stem 33 has a rib 34 on its peripheral wall. The rib 34 is embedded in the lateral hole 54. The cooperation between the rib 34 and the lateral hole 54 positions the limiting ring 5 and the valve core 3 in the circumferential direction to prevent the limiting ring 5 and the valve core 3 from being relatively displaced in the circumferential direction.

[0035] The rib 34 extends along the axial direction of the valve stem 33, so that after the protrusion 52 slides along the strip groove 25 to the other end of the strip groove 25, force can be applied to the rib 34 to make the valve core 3 drive the limit ring 5 to rotate.

[0036] To facilitate connection between the pipe body 2 and the pump body, the inlet 21 of the pipe body 2 is provided with a connecting part 27 for connection with the pump body. In this embodiment, the connecting part 27 is a threaded part. The structure of the pump body can refer to the structure of the patent cited in the background art.

[0037] The pipe body 2 passes through the box body 1 axially and is fixed relative to the box body 1. The inlet 21 and outlet 22 of the pipe body 2 are both located outside the box body 1. Electrical components (such as circuit boards) and wiring terminals are provided on the box body 1, which further enables the flow switch to work relatively independently.

Claims

1. A water flow switch directly installed in a waterway, comprising a pipe body (2) and a valve core (3) and a spring (4) disposed in the pipe body (2), wherein the pipe body (2) is provided with an inlet (21) and an outlet (22), the inlet (21) being used to connect to a pump body, and the valve core (3) comprising a plug (31), a limiting part (32) and a valve stem (33) arranged and connected in sequence; Its features are, The inlet (21) of the pipe body (2) is provided with a connecting part (27) for connecting to the pump body; The pipe body (2) is provided with a partition (23) along its radial direction, and the partition (23) is provided with a through hole (24) connecting the inlet (21) and the outlet (22); A limiting ring (5) is fitted on the valve stem (33). The limiting ring (5) can be fixed axially relative to the pipe body (2), and the valve stem (33) can move axially relative to the limiting ring (5). The end face of the limiting part (32) facing the partition (23) can abut against the partition (23), one end of the spring (4) abuts against the limiting ring (5), and the other end abuts against the limiting part (32); The plug (31) is kept in the through hole (24) by the action of the spring (4) to block the through hole (24), and the plug (31) can be moved out of the through hole (24) under the action of water flow.

2. The flow switch according to claim 1, characterized in that: The limiting ring (5) includes an annular body (51) sleeved on the valve stem (33) and a protrusion (52) formed on the peripheral wall of the annular body (51). The inner peripheral wall of the pipe body (2) is provided with a strip groove (25) extending along its axial direction. One end of the strip groove (25) passes through the water outlet (22), and the other end extends along the circumference of the pipe body (2) to form a limiting groove (26). The protrusion (52) can slide along the strip groove (25) to the other end of the strip groove (25) and then rotate and be limited in the limiting groove (26).

3. The flow switch according to claim 2, characterized in that: The limiting groove (26) has a certain length along the axial direction of the tube body (2), and the protrusion (52) can abut against one of the side walls of the limiting groove (26).

4. The flow switch according to claim 1, characterized in that: The limiting ring (5) has multiple limiting blocks (53) spaced circumferentially on its end face facing the partition (23), and the spring (4) is limited in the area enclosed by the multiple limiting blocks (53) along the radial direction of the limiting ring (5).

5. The flow switch according to claim 1, characterized in that: The limiting ring (5) has a lateral hole (54) communicating with the annular area (55) on its periphery, and the valve stem (33) has a rib (34) on its peripheral wall, which is embedded in the lateral hole (54).

6. The flow switch according to claim 5, characterized in that: The rib (34) extends along the axial direction of the valve stem (33).

7. The flow switch according to any one of claims 1 to 6, characterized in that: The valve core (3) is provided with a magnetic component, and the tube body (2) is provided with a trigger component that can connect or disconnect with the magnetic component.

8. The flow switch according to any one of claims 1 to 6, characterized in that: The connecting part (27) is a threaded part.

9. The flow switch according to any one of claims 1 to 6, characterized in that: It also includes a box (1), the tube (2) passes through the box (1) axially and is fixed relative to the box (1), the water inlet (21) and water outlet (22) of the tube (2) are both located outside the box (1), and electrical components and wiring terminals are provided on the box (1).

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