Anti-scale flow switch for pump

Abstract

The utility model relates to an anti-scale flow switch for a pump, which comprises a shell, a top cover and an end socket, a water passing cavity with an upper opening and a lower opening is formed in the shell, a water outlet hole is formed in the side part of the shell, the top cover is detachably connected with the top of the shell, and the end socket is arranged in the water passing cavity and can move up and down. A dry reed is arranged in an induction column at the bottom of the top cover, an adaptive magnet is arranged in an induction cavity of the end socket, a spring between the dry reed and the adaptive magnet drives the end socket to move downwards, and a dirt discharging channel is formed between the induction cavity and the induction column. A limiting boss is arranged at the bottom of the shell. Guide strips are arranged on the periphery of the end socket and matched with the shell guide grooves. The shell and the top cover are connected through a detachable structure of a clamping groove and a clamping block, and the clamping groove comprises a locking groove and a detachable groove. A control box and a mounting platform with a mounting hole are arranged at the top of the top cover, and a sealing ring is arranged at the bottom of the top cover. Impurities and dirt are prevented from being accumulated through the dirt discharging channel, the problem that an existing flow switch is prone to being damaged is solved, and the flow switch has the advantages of being convenient to disassemble and assemble and high in stability.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid pumps and relates to a flow switch for pumps which can prevent scaling. Background Art

[0002] A fluid pump is a device that transports fluid. During the operation of the fluid pump, if the water inlet of the fluid pump is blocked by debris or other reasons, the fluid pump will not be able to pump water smoothly from the water inlet, which will cause the water pump to run idle without water. When the fluid pump is in a waterless and idling state for a long time, it is easy to cause damage to the water pump motor. Therefore, a flow switch is generally connected to the water inlet of the water pump through a pipe to monitor the water flow at the water inlet of the fluid pump to control the start and stop of the water pump.

[0003] For example, the Chinese utility model patent application number 202323428153.X (authorization announcement number CN221400899U) discloses a "water pump flow switch that is easy to disassemble and assemble", which includes a switch body, a connecting pipe and a connecting assembly. An interface is formed at the end of the connecting pipe. The connecting assembly includes a mounting sleeve, a first clamping hoop and a second clamping hoop. The mounting sleeve is provided with a first window and a second window aligned with each other. The first clamping hoop and the second clamping hoop are both in the shape of arc plates. One end of the first clamping hoop and the second clamping hoop is rotatably connected to the first window. The other ends of the first clamping hoop and the second clamping hoop are respectively formed with a first locking portion and a second locking portion that pass through the second window. The first locking portion and the second locking portion are respectively provided with a first bolt hole and a second bolt hole aligned with each other. A locking bolt passes through the first bolt hole and the second bolt hole and is screwed with a locking nut. The mounting sleeve is connected to the connecting pipe so that the first clamping hoop and the second clamping hoop surround the circumference of the interface. This water pump flow switch that is easy to disassemble and assemble makes the disassembly and assembly of the flow switch very convenient.

[0004] However, this type of flow switch also has its shortcomings. In some applications, the fluid usually contains impurities and dirt. During long-term use, these impurities and dirt will accumulate inside the flow switch, eventually causing the flow switch to be damaged and fail, and also causing the supporting fluid pump to fail to operate normally.

[0005] Therefore, how to provide a flow switch that can prevent the accumulation of impurities and dirt that enter the interior, is easy to assemble and disassemble, and has high stability is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a flow switch for a pump which is easy to assemble and disassemble, has high stability and can prevent the accumulation of impurities and dirt entering the interior and is anti-scaling, in view of the above-mentioned prior art.

[0007] The utility model solves the above-mentioned technical problems by adopting a technical solution: a scale-proof flow switch for a pump, comprising a housing, a top cover, and a sealing head. A water passage chamber with upper and lower openings is formed inside the housing. A water outlet connected to the water passage chamber is provided on a side of the housing. The top cover is detachably mounted at the top opening of the housing. The sealing head is embedded in the water passage chamber and can move up and down relative to the housing within a set range. A downwardly extending sensing post is provided at the bottom of the top cover. A reed is provided in the sensing post. A sensing cavity is vertically formed in the sealing head, which is electrically connected up and down and allows the sensing post to move up and down. A magnet is also provided in the sensing cavity, which is adapted to fit the reed. The sealing head can move upward under the impact of water flow. During the upward movement, the relative position of the reed and the magnet can be changed to control whether a motor is started or not. A spring is provided between the sealing head and the top cover to drive the sealing head to move downward at all times. A scale discharge channel for water flow and dirt is also formed between the sensing cavity and the sensing post.

[0008] In order to better form a dirt discharge channel inside the flow switch for impurities and dirt to pass through, preferably, the cross-section of the sensing chamber is circular, the magnet is annular and embedded on the inner wall of the sensing chamber, and the sensing column is cylindrical to facilitate its insertion into the sensing chamber and the magnet. The gap between the inner circumference of the sensing chamber and the outer circumference of the sensing column forms the dirt discharge channel.

[0009] In order to optimize the matching structure between the magnet and the induction cavity so as to better form a gap inside the induction cavity, preferably, the inner circumference of the magnet and the inner circumference of the induction cavity are arranged flush.

[0010] In order to limit the head to move up and down only within a set range, preferably, a limit boss is provided on the inner peripheral wall located at the bottom opening of the shell, and a limit flange adapted to the limit boss is formed on the outer peripheral surface of the head. When the head moves downward to the set position, the limit flange can press against the limit boss to limit the head from continuing to move downward.

[0011] In order to make the head move more steadily and smoothly when moving up and down, preferably, a plurality of guide bars are vertically arranged on the outer peripheral surface of the head, and a guide groove is formed on the inner peripheral wall of the bottom opening of the shell to constrain the guide bars to move only up and down.

[0012] In order to better realize the detachable connection between the top cover and the shell, preferably, a detachable structure is provided between the shell and the top cover, and the detachable structure includes a snap-fit ​​groove provided on the shell and a clamping block provided on the top cover, and the detachable connection between the shell and the top cover is realized by mutual adaptation of the snap-fit ​​groove and the clamping block.

[0013] In order to optimize the overall structure of the card slot so that it can better cooperate with the card block to achieve locking or mutual disengagement, preferably, the card slot includes a locking slot and a disengagement slot, the top of the disengagement slot extends to the top opening edge of the shell, the locking slot extends around the circumference of the shell and is connected to the bottom of the disengagement slot, the bottom of the top cover extends downward with an annular wall that can extend into the water passage chamber, the card block is provided on the outer circumferential surface of the annular wall, and when the card block is inserted into the disengagement slot from top to bottom, the card block can be circumferentially inserted into the locking slot or disengaged from the locking slot by rotating the top cover, thereby realizing a detachable connection between the shell and the top cover.

[0014] In order to enable the flow switch to better discharge water, preferably, there are multiple water outlet holes, and the multiple water outlet holes are distributed at intervals along the circumference of the shell.

[0015] In order to enable the flow switch to better control whether the motor is started or not, preferably, a control box is further provided on the top of the top cover, and a controller electrically connected to the reed is provided in the control box.

[0016] In order to enable the flow switch to be better installed on the water pump, preferably, a mounting platform is provided on the top of the top cover, and a mounting hole is penetrated on the mounting platform for fasteners to pass through up and down. The bottom of the mounting platform is also provided with a sealing ring mounted on the outer peripheral surface of the top cover.

[0017] Compared with the prior art, the advantages of the present invention are as follows: a water passage cavity with upper and lower openings is formed inside the shell, and a water outlet is provided on the side of the shell, the top cover can be detachably connected to the top of the shell, and the head is built into the water passage cavity and can move up and down along the shell, and a sensing column extending downward and provided with a reed is provided at the bottom of the top cover. Since the head here forms an induction cavity for the induction column to move up and down, a magnet that can adapt to the reed is provided in the induction cavity, and a spring that can drive the head to always move downward is provided between the head and the top cover. When the flow switch is installed When installed on the pump body, the head will move upward under the impact of the water flow, causing the relative position of the reed and the magnet to change, thereby controlling whether the motor is started or not to achieve flow control of the water pump. Since a dirt discharge channel for water flow and dirt is formed between the sensing chamber and the sensing column, impurities or dirt passing through the flow switch can be quickly discharged through the dirt discharge channel without accumulating, solving the problem of flow switches in the prior art being easily damaged and failed due to the accumulation of impurities and dirt. In addition, the flow switch is also easy to disassemble and install, low cost and high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the three-dimensional structure of this embodiment;

[0019] Figure 2 This is a schematic diagram of the structure of the decomposed state of this embodiment;

[0020] Figure 3 This is a schematic diagram of the structure of the embodiment in another decomposition state from another angle;

[0021] Figure 4 This is a schematic diagram of the longitudinal cross-sectional structure of this embodiment;

[0022] Figure 5 Schematic diagram of the internal structure of the shell in this embodiment. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0024] Figures 1 to 5 FIG. 1 is a schematic diagram of the present embodiment. The anti-scaling flow switch for a pump in the present embodiment mainly includes a housing 1 , a top cover 2 , a head 3 , a spring 4 , and the like.

[0025] refer to Figures 1 to 4 As shown, in this embodiment, a water passage chamber 1a with upper and lower openings is formed inside the shell 1, and a water outlet 1b connected to the water passage chamber 1a is provided on the side of the shell 1. The top cover 2 is detachably provided at the top opening of the shell 1. The head 3 is built into the water passage chamber 1a and can move up and down relative to the shell 1 within a set range. A downwardly extending sensing column 2a is provided at the bottom of the top cover 2, and a reed 2a1 is provided in the sensing column 2a. The head 3 is vertically formed with a sensing chamber 3a that is conductive up and down and can allow the sensing column 2a to move up and down. A magnet 3b that can adapt to the reed 2a1 is also provided in the sensing chamber 3a. The head 3 can move upward under the impact of water flow. During the upward movement, the head 3 can control whether the motor is started or not by changing the relative position of the reed 2a1 and the magnet 3b. A spring 4 that can drive the head 3 to move downward is provided between the head 3 and the top cover 2. A dirt discharge channel 5 for water flow and dirt to pass through is also formed between the sensing chamber 3a and the sensing column 2a.

[0026] In order to better form a dirt discharge channel 5 for impurities and dirt to pass through inside the flow switch, refer to Figure 4 and Figure 5 As shown, in this embodiment, the cross-section of the induction chamber 3a is circular, the magnet 3b is annular and embedded in the inner wall of the induction chamber 3a, the induction column 2a is cylindrical to facilitate its insertion into the induction chamber 3a and the magnet 3b, and the gap between the inner circumference of the induction chamber 3a and the outer circumference of the induction column 2a forms a dirt discharge channel 5.

[0027] Secondly, in order to optimize the matching structure between the magnet 3b and the induction cavity 3a, refer to Figure 4 As shown, the inner circumference of the magnet 3b is flush with the inner circumference of the induction cavity 3a.

[0028] Also, in order to limit the head 3 to move up and down within the set range, refer to Figure 2 and Figure 4 As shown, in this embodiment, a limiting boss 1c is provided on the inner peripheral wall at the bottom opening of the shell 1, and a limiting flange 3c adapted to the limiting boss 1c is formed on the outer peripheral surface of the head 3. When the head 3 moves downward to the set position, the limiting flange 3c can press against the limiting boss 1c to limit the head 3 from continuing to move downward.

[0029] In addition, in order to make the head 3 more stable and smooth in the process of moving up and down, refer to Figure 2 and Figure 3 As shown, in this embodiment, a plurality of guide bars 3d are vertically arranged on the outer peripheral surface of the head 3, and a guide groove 1d is formed on the inner peripheral wall of the bottom opening of the shell 1 to constrain the guide bars 3d to move only up and down.

[0030] In this embodiment, in order to better realize the detachable connection between the top cover 2 and the housing 1, Figure 2 As shown, a detachable structure 6 is intentionally provided between the shell 1 and the top cover 2. The detachable structure 6 includes a snap-in groove 6a provided on the shell 1 and a clamping block 6b provided on the top cover 2. The detachable connection between the shell 1 and the top cover 2 is achieved by mutual adaptation of the snap-in groove 6a and the clamping block 6b.

[0031] In this embodiment, in order to optimize the overall structure of the engaging groove 6a so that it can better cooperate with the card block 6b to achieve locking or mutual disengagement, the engaging groove 6a here includes a locking groove 6a1 and a disengagement groove 6a2. The top of the disengagement groove 6a2 extends to the top opening edge of the shell 1, and the locking groove 6a1 extends around the circumference of the shell 1 and is connected to the bottom of the disengagement groove 6a2. The bottom of the top cover 2 extends downward to have an annular wall 2c that can extend into the water chamber 1a. The card block 6b is arranged on the outer circumferential surface of the annular wall 2c. When the card block 6b is inserted into the disengagement groove 6a2 from top to bottom, the card block 6b can be circumferentially engaged with the locking groove 6a1 or disengaged from the locking groove 6a1 by rotating the top cover 2, thereby realizing a detachable connection between the shell 1 and the top cover 2.

[0032] refer to Figure 1 As shown, in this embodiment, in order to enable the flow switch to better realize water outlet, a plurality of water outlet holes 1b are provided, and the plurality of water outlet holes 1b are distributed at intervals along the circumference of the housing 1.

[0033] refer to Figures 2 to 4 As shown, in this embodiment, in order to enable the flow switch to better control whether the motor is started or not, a control box 7 is further provided on the top of the top cover 2. The control box 7 contains a controller 7a electrically connected to the reed 2a1.

[0034] In this embodiment, reference Figure 1As shown, in order to better install the flow switch on the water pump, a mounting platform 2d is provided on the top of the top cover 2. A mounting hole 2d1 is provided on the mounting platform 2d for the fastener A to pass through up and down. A sealing ring 8 is also provided on the bottom of the mounting platform 2d and is sleeved on the outer peripheral surface of the top cover 2.

[0035] Additional explanation is required here: in this embodiment, a water flow chamber 1a with upper and lower openings is formed inside the shell 1, and a water outlet 1b is provided on the side of the shell 1, and the top cover 2 is detachably connected to the top of the shell 1, and the head 3 is built into the water flow chamber 1a and can move up and down along the shell 1, and a sensing column 2a extending downward and provided with a reed is provided at the bottom of the top cover 2. Since the head 3 here forms a sensing chamber 3a for the sensing column 2a to move up and down, a magnet 3b that can adapt to the reed 2a1 is provided in the sensing chamber 3a, and a spring 4 that can drive the head 3 to move downward all the time is provided between the head 3 and the top cover 2. When the flow switch is installed on the pump body, the head 3 will move upward under the impact of the water flow, causing the relative position of the reed 2a1 and the magnet 3b to change until the magnet 3b no longer senses the reed 2a1 (at this time the magnet 3b and the reed are not in contact with each other). 2a1 exceeds a certain distance), the dry reed 2a1 no longer controls the operation of the motor, and the amount of fluid flowing into the pump body will continue to increase; when the flow rate of the fluid decreases, the entire head 4 will move downward under the rebound action of the spring 4, and the spring 4 will stretch and recover its deformation. At this time, the magnet 3b will sense the dry reed 2a1, and the dry reed 2a1 controls the motor to always be in the started state, so that the flow switch can smoothly control whether the motor is started to achieve flow control of the water pump. Since a dirt discharge channel 5 for water flow and dirt to pass through is formed between the sensing chamber 3a and the sensing column 2a, impurities or dirt passing through the flow switch can be quickly discharged through the dirt discharge channel 5 without accumulation, thereby solving the problem that the flow switch in the prior art is easily damaged and failed due to the accumulation of impurities and dirt. In addition, the flow switch also has the characteristics of easy disassembly and assembly, low cost and high stability.

[0036] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "inside, outside", "up, down", etc. indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A flow switch for a pump capable of preventing scaling, characterized by: The invention comprises a shell (1), a top cover (2) and a sealing head (3); a water passage cavity (1a) with upper and lower openings is formed inside the shell (1); a water outlet hole (1b) connected to the water passage cavity (1a) is provided on the side of the shell (1); the top cover (2) is detachably provided at the top opening of the shell (1); the sealing head (3) is built into the water passage cavity (1a) and can move up and down relative to the shell (1) within a set range; a sensing column (2a) extending downward is provided at the bottom of the top cover (2); a dry reed (2a1) is provided in the sensing column (2a); the sealing head (3) is vertically formed with a vertically conductive and capable A sensing chamber (3a) is provided for the sensing column (2a) to move up and down. A magnet (3b) capable of adapting to the reed sheet (2a1) is further provided in the sensing chamber (3a). The sealing head (3) can move upward under the impact of water flow. During the upward movement, the sealing head (3) can control whether the motor is started or not by changing the relative position of the reed sheet (2a1) and the magnet (3b). A spring (4) capable of driving the sealing head (3) to always move downward is provided between the sealing head (3) and the top cover (2). A dirt discharge channel (5) for allowing water flow and dirt to pass through is also formed between the sensing chamber (3a) and the sensing column (2a).

2. The anti-scaling pump flow switch according to claim 1, characterized in that: The cross section of the induction chamber (3a) is circular, the magnet (3b) is annular and embedded in the inner wall of the induction chamber (3a), the induction column (2a) is cylindrical so as to be conveniently inserted into the induction chamber (3a) and the magnet (3b), and the gap between the inner circumference of the induction chamber (3a) and the outer circumference of the induction column (2a) forms the dirt discharge channel (5).

3. The anti-scaling pump flow switch according to claim 2, characterized in that: The inner circumference of the magnet (3b) and the inner circumference of the induction cavity (3a) are arranged flush.

4. The anti-scaling pump flow switch according to claim 1, characterized in that: A limiting boss (1c) is provided on the inner peripheral wall at the bottom opening of the shell (1), and a limiting flange (3c) adapted to the limiting boss (1c) is formed on the outer peripheral surface of the head (3). When the head (3) moves downward to a set position, the limiting flange (3c) can press against the limiting boss (1c) to limit the head (3) from continuing to move downward.

5. The anti-scaling pump flow switch according to claim 1, characterized in that: A plurality of guide bars (3d) are vertically arranged on the outer peripheral surface of the sealing head (3), and a guide groove (1d) is formed on the inner peripheral wall at the bottom opening of the shell (1) to constrain the guide bars (3d) to move only up and down.

6. The anti-scaling flow switch for a pump according to any one of claims 1 to 5, characterized in that: A detachable structure (6) is provided between the shell (1) and the top cover (2), and the detachable structure (6) comprises a snap-fit ​​groove (6a) provided on the shell (1) and a clamping block (6b) provided on the top cover (2). The detachable connection between the shell (1) and the top cover (2) is achieved by mutual adaptation of the snap-fit ​​groove (6a) and the clamping block (6b).

7. The anti-scaling pump flow switch according to claim 6, characterized in that: The engaging groove (6a) comprises a locking groove (6a1) and a disengaging groove (6a2); the top of the disengaging groove (6a2) extends to the top opening edge of the shell (1); the locking groove (6a1) extends circumferentially around the shell (1) and communicates with the bottom of the disengaging groove (6a2); the bottom of the top cover (2) extends downward to form an annular wall (2c) capable of extending into the water passage chamber (1a); the clamping block (6b) is provided on the outer circumferential surface of the annular wall (2c); when the clamping block (6b) is inserted from top to bottom into the disengaging groove (6a2), the clamping block (6b) can be circumferentially engaged with or disengaged from the locking groove (6a1) by rotating the top cover (2), thereby achieving a detachable connection between the shell (1) and the top cover (2).

8. The anti-scaling pump flow switch according to claim 1, characterized in that: There are a plurality of water outlet holes (1b), and the plurality of water outlet holes (1b) are distributed at intervals along the circumference of the shell (1).

9. The anti-scaling pump flow switch according to claim 1, characterized in that: A control box (7) is also provided on the top of the top cover (2), and a controller (7a) electrically connected to the reed sheet (2a1) is provided in the control box (7).

10. The anti-scaling flow switch for a pump according to claim 1, characterized in that: The top of the top cover (2) is provided with a mounting platform (2d), the mounting platform (2d) is provided with a mounting hole (2d1) for the fastener (A) to pass through, and the bottom of the mounting platform (2d) is also provided with a sealing ring (8) sleeved on the outer peripheral surface of the top cover (2).

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