CN114909500A

CN114909500A - Non-return device capable of detecting flow and water pump

Info

Publication number: CN114909500A
Application number: CN202210531916.4A
Authority: CN
Inventors: 叶金鹏; 王师; 夏轲; 卢威兴
Original assignee: Zhejiang Shimge Pump Co Ltd
Current assignee: Zhejiang Shimge Pump Co Ltd
Priority date: 2022-05-16
Filing date: 2022-05-16
Publication date: 2022-08-16

Abstract

The invention relates to a non-return device capable of detecting flow and a water pump, which solve the problems of two components of a turbine flow sensor and a non-return valve in the prior art, and adopt the following technical scheme: including check valve and hall element, set up the magnet on the valve shaft of check valve, the valve shaft for but the disk seat axial displacement of check valve, the magnet with hall element cooperation, hall element is used for setting up on the pipe wall of the outlet pipe of the pump body, at least hall element's the inner stretches into in the inner chamber of outlet pipe, the check valve is arranged in the inner chamber of the outlet pipe of the setting at the pump body, the check valve is used for the water non return, the check valve with hall element cooperation is arranged in detecting the discharge of water in the outlet pipe of the pump body. The method has the following effects: the non-return device is changed, and two independent parts are replaced by one combined part, so that the flow can be detected, the non-return effect can be realized, the processing and maintenance cost is reduced, and the assembly and maintenance efficiency is improved.

Description

Non-return device capable of detecting flow and water pump

Technical Field

The invention relates to a check device applied to a water pump, in particular to a check device capable of detecting flow.

Background

The check device in the water pump at present has the following current situation:

1. the non-return device uses extensively in the water pump, and especially the intelligent pump is very big to the demand of non-return device, and different pipe diameters will be equipped with the non-return device of different sizes, and current non-return device occupies that the volume is huge, and the function is single, when non-return device specification kind is numerous many, occupies more volumes, increases the occupation space cost.

2. The non-return device does not have statistical function to rivers data in traditional water pump, generally detects through old-fashioned turbine formula flow sensor, has the non-return device promptly in a water pump, has bulky turbine formula flow sensor again, and spare part kind is more, not only has manufacturing cost and the high problem of the successful height of maintenance, still influences assembly maintenance efficiency.

3. The traditional non-return device is not provided with a blade, so that the non-return device is easily blocked by impurities and cannot normally work, sealing failure is caused, and the non-return function is lost.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a non-return device capable of detecting flow and a water pump, the structure of the non-return device is changed, the matching of a magnet and a Hall element is integrated for detecting the flow, the non-return device has the function of a check valve and also has the function of detecting the flow, two independent parts are replaced by one combined part, the occupied volume of the parts is reduced, the processing and maintenance costs are reduced, and the assembly and maintenance efficiency is improved; in addition, the turbine impeller is arranged in the valve seat and integrated on the piston, so that one part of the piston has two functions, namely the function of opening or closing a channel in the check device, and the rotating water flow of the turbine impeller is realized, and the condition that the check effect and the sealing effect are invalid because the piston is clamped by foreign matters is avoided.

The technical purpose of the invention is mainly solved by the following technical scheme: detectable flow's non return device, its characterized in that includes check valve and hall element, set up the magnet on the valve shaft of check valve, the valve shaft for but the disk seat axial displacement of check valve, the magnet with hall element cooperation, hall element is used for setting up on the pipe wall of the outlet pipe of the pump body, at least hall element's the inner stretches into in the inner chamber of outlet pipe, the check valve is arranged in the inner chamber of the outlet pipe of the pump body, the check valve is used for the water non return, the check valve with hall element cooperation is used for detecting the discharge of water in the outlet pipe of the pump body. The structure of the non-return device is changed, the integrated magnet is matched with the Hall element and used for detecting flow, the non-return device is arranged, the non-return device has the function of a non-return valve and also has the function of detecting flow, two independent parts are replaced by one combined part, the occupied size of the parts is reduced, the processing and maintenance cost is reduced, and the assembly and maintenance efficiency is improved

As a further improvement and supplement to the above technical solution, the present invention adopts the following technical measures:

the check valve comprises an impeller cavity arranged in the valve seat, an impeller arranged in the impeller cavity is a turbine impeller, and the lift angle psi of blades on the impeller is 45 degrees. The turbine impeller is arranged in the valve seat and integrated on the piston, so that one part of the piston has two functions, namely the function of opening or closing a channel in the check device is achieved, the rotating water flow of the turbine impeller is achieved, and the situation that the check effect and the sealing effect are invalid due to the fact that the piston is clamped by foreign matters is avoided.

When water flows into the check valve, the water impacts the blade surface with the lead angle psi of 45 degrees, and through the decomposition of force, a radial force and a longitudinal force are respectively given to the blade, and the radial force pushes the blade to rotate. The rotating impeller can prevent sand accumulation from affecting sealing and can avoid foreign matter from being clamped.

The relationship between the water flow speed and the rotating speed of the blades is as follows: TSR ═ pi nR/30v, where TSR is the tip speed ratio, which is the ratio of the linear velocity at the tip of the blade to the water velocity, for a determined blade shape, the tip speed ratio is determined, n is the rotational speed, R is the maximum radius, and v is the water velocity. The valve shaft provided with the impeller has the valve core effect of the check valve and the turbine rotating effect of the turbine type blade. The functions are increased while the parts are reduced.

The check valve further comprises a spring, one end of the spring is matched with the valve seat, the other end of the spring is matched with the valve shaft, a sealing ring structure is arranged on the outer wall of the valve seat, the spring is used for enabling the valve shaft to reset, a piston on the valve shaft seals the impeller cavity, the water outlet pipe is cut off to be used for stopping, when the spring is compressed under stress, the piston on the valve shaft enables the impeller cavity to be opened, and the water outlet pipe is smoothly used for water outlet.

The hall element is disposed on a plane perpendicular to an axis of the valve shaft, and the hall element is located in a peripheral space of the valve shaft. The Hall element can convert the detected magnetic field into an actual voltage value, and the actual flow can be converted by detecting the voltage value. Because hall element is small, can adapt to the outlet pipe of various water pumps, the check valve in the outlet pipe with the water pump better is the non return device that this technical scheme relates to, and wherein, the check valve setting is in the outlet pipe, drills on the pipe wall of outlet pipe, encapsulation hall element in the drilling, and the non return device commonality of this technical scheme design is strong.

The hall element is encapsulated in an epoxy potting enclosure.

When the outer end of the valve shaft is in a maximum extension state, the center of the hall element and the center of the magnet are located on the same plane.

Set up non return device's of detectable flow water pump, including the pump casing, set up the outlet pipe on the pump casing, its characterized in that set up foretell check valve in the inner chamber of outlet pipe, set up foretell hall element in the pipe wall of outlet pipe, set up the magnet on the valve shaft of check valve, the valve shaft for but valve seat axial displacement of check valve, the magnet with the hall element cooperation, at least the inner of hall element stretches into in the inner chamber of outlet pipe, the check valve is used for the water non return, the check valve with the discharge in the outlet pipe of the hall element cooperation is used for detecting the pump body. When the water pump runs, the vertical distance L value between the magnet and the Hall element can be increased according to different water flows and water pressures, so that the relative position of the magnet and the Hall element is changed, the size of the magnetic field on the surface of the Hall element is changed, and the requirements of different water pumps on performance are met.

The Hall element converts the detected magnetic field size of the magnet into an actual voltage value V, and the actual voltage value V can be converted into a water flow Q through detecting the voltage value; the zero point voltage value V0 is adjusted by changing the value of the horizontal distance d between the center of the magnet and the center of the hall element.

The zero voltage value can be adjusted by changing the horizontal distance d value of the magnet and the Hall element, and the detection sensitivity of the check device can be adjusted.

Under the normal state (without external magnetic field interference), and the hall element outputs the voltage V0 under the power supply of the standard voltage, because the d value has structural interference, when d is equal to dmin (namely the minimum value of d), only the transverse magnetic field is considered at the moment, the magnetic field is maximum at the moment, and when d is greater than dmin, the magnetic field is gradually reduced, so that the voltage at the zero point can be adjusted by selecting the hall element with corresponding parameters and setting the d value aiming at pumps of different models in the design stage, and the sensitivity is adjusted.

The distance between the center of the magnet and the proximal end face of the valve seat is L, when water flows through the check valve, the water flows generate acting force on the check valve to push the valve core to move towards the water outlet direction, the value of L changes, the voltage value changes to V1, the voltage change value Vf is | V1-V0|, when the value of L reaches the maximum value Lmax, the voltage value Vout returns to V0, when the value of L changes to Lp, the voltage value Vout is V0+ Lp/Lmax Vf, and the water flow Q is (Vout-V0)/Vf × Qmax is obtained.

When the N pole of the magnet faces the water outlet, the voltage sensed by the Hall element is Va, when the N pole of the magnet faces the water inlet of the water outlet pipe, the voltage sensed by the Hall element is Vb, and the voltage sensed by the Hall element is Vf | (Va-V0 |) | (Vb-V0 |) | (V1-V0 |).

When water flows through the check valve, the water flow exerts a force on the check valve to push the valve core (i.e. the integrated body of the valve shaft, the piston and the turbine impeller) to change the value L, the voltage changes to V1, the voltage change value Vf is | V1-V0|, when the value L reaches the maximum value Lmax, the output voltage Vout is restored to V0, when the value L changes to Lp (the value L changes), the output voltage Vout is V0+ Lp/Lmax Vf, the water flow Q is (Vout-V0)/Vf Qmax, and Qmax is the maximum water flow, so that the water flow can be obtained.

Since the magnetic pole of the magnet cannot be determined when the check valve is assembled, it is necessary to test the magnetic pole of the magnet, and when the N pole of the magnet faces the water outlet, the voltage is Va, and when the N pole of the magnet faces the water inlet, the voltage is Vb, and when the voltage is Vf ═ Va-V0| Vb-V0| -V1-V0 |.

The invention has the following beneficial effects: the structure of the non-return device is changed, the matching of the integrated magnet and the Hall element is used for detecting flow, the non-return device has the functions of a non-return valve and flow detection, two independent components are replaced by one combined component, the occupied volume of the components is reduced, the processing and maintenance cost is reduced, and the assembly and maintenance efficiency is improved; the turbine impeller is arranged in the valve seat and integrated on the piston, so that one part of the piston has two functions, namely the function of opening or closing a channel in the check device is achieved, the rotating water flow of the turbine impeller is achieved, and the situation that the check effect and the sealing effect are invalid due to the fact that the piston is clamped by foreign matters is avoided.

Drawings

Fig. 1 is a schematic cross-sectional view of the water outlet pipeline (only a partial pipe section of the water outlet pipeline is shown in the figure) and the check device according to the present invention.

Fig. 2 is a schematic sectional view of the check valve according to the present invention (check state).

Fig. 3 is a schematic sectional view showing the check valve according to the present invention in a state of being opened and allowing water to pass therethrough.

Fig. 4 is a schematic cross-sectional view of a valve body (including a structure in which a valve shaft, a piston, and a turbine impeller are integrally formed) in the check valve according to the present invention.

Fig. 5 is a schematic perspective view of a valve body (including a structure in which a valve shaft, a piston, and a turbine impeller are integrally formed) in the check valve according to the present invention.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Example (b): as shown in fig. 1-5, the non-return device capable of detecting the flow comprises a check valve 1 and a hall element 2, wherein a magnet 4 is arranged on a valve shaft 3 of the check valve, the valve shaft is axially movable relative to a valve seat of the check valve, the magnet is matched with the hall element, the hall element is arranged on a pipe wall of a water outlet pipe of the pump body, at least the inner end of the hall element extends into an inner cavity of the water outlet pipe, the check valve is arranged in the inner cavity of the water outlet pipe of the pump body, the check valve is used for water non-return, and the check valve is matched with the hall element to detect the water flow in the water outlet pipe of the pump body. The structure of the non-return device is changed, the integrated magnet is matched with the Hall element and used for detecting flow, the non-return device is arranged, the non-return device has the function of a non-return valve and also has the function of detecting flow, two independent parts are replaced by one combined part, the occupied size of the parts is reduced, the processing and maintenance cost is reduced, and the assembly and maintenance efficiency is improved

Preferably, the check valve comprises an impeller cavity 6 arranged in the valve seat 9, an impeller 7 arranged in the impeller cavity, the impeller is a turbine impeller, and the lift angle Ψ of the blade 71 on the impeller is 45 degrees. The turbine impeller is arranged in the valve seat and integrated on the piston 8, so that one part of the piston has two functions, namely the function of opening or closing a channel in the check device is realized, and the rotating water flow of the turbine impeller is realized, thereby avoiding the failure of the check effect and the sealing effect caused by the clamping of the piston by foreign matters.

When water flows into the check valve, the water impacts the blade surface with the rising angle psi of the blade 71 being 45 degrees, and through the decomposition of force, a radial force and a longitudinal force are respectively given to the blade, and the radial force pushes the blade to rotate. The rotating impeller can prevent sand accumulation from affecting sealing and can avoid foreign matter from being clamped.

The check valve further comprises a spring 10, one end of the spring is matched with the valve seat 9, the other end of the spring is matched with the valve shaft 3, a sealing ring 11 structure is arranged on the outer wall of the valve seat, the spring is used for enabling the valve shaft to reset, a piston on the valve shaft seals the impeller cavity, the water outlet pipe is cut off to be used for stopping, when the spring is compressed under stress, the piston on the valve shaft enables the impeller cavity to be opened, and the water outlet pipe is unobstructed and used for water outlet.

The hall element is encapsulated in an epoxy potting enclosure.

Set up non return device's of detectable flow water pump, including the pump casing, set up outlet pipe 12 on the pump casing, set up foretell check valve 1 in the inner chamber of outlet pipe, set up foretell hall element 2 in the pipe wall of outlet pipe, set up the magnet on the valve shaft of check valve, the valve shaft for but the disk seat axial displacement of check valve, the magnet with hall element cooperation, at least the inner of hall element stretches into in the inner chamber of outlet pipe, the check valve is used for the water non return, the check valve with the discharge of water in the outlet pipe of the hall element cooperation is used for detecting the pump body. When the water pump runs, the vertical distance L value between the magnet and the Hall element can be increased according to different water flows and water pressures, so that the relative position of the magnet and the Hall element is changed, the size of the magnetic field on the surface of the Hall element is changed, and the requirements of different water pumps on performance are met.

When the N pole of the magnet faces the water outlet, the voltage sensed by the Hall element is Va, and when the N pole of the magnet faces the water inlet of the water outlet pipe, the voltage sensed by the Hall element is Vb, and the voltage sensed by the Hall element is Vf | Va-V0| Vb-V0| V1-V0 |.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. In the above embodiments, the present invention may be variously modified and changed. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Detectable flow's non return device, its characterized in that includes check valve and hall element, set up the magnet on the valve shaft of check valve, the valve shaft for but the disk seat axial displacement of check valve, the magnet with hall element cooperation, hall element is used for setting up on the pipe wall of the outlet pipe of the pump body, at least hall element's the inner stretches into in the inner chamber of outlet pipe, the check valve is arranged in the inner chamber of the outlet pipe of the pump body, the check valve is used for the water non return, the check valve with hall element cooperation is used for detecting the discharge of water in the outlet pipe of the pump body.

2. The flow detectable check device according to claim 1, characterized in that the check valve comprises an impeller cavity disposed in the valve seat, the impeller disposed in the impeller cavity is a turbine-type impeller, and a lift angle Ψ of a vane on the impeller is 45 degrees.

3. The flow rate detectable check device according to claim 2, wherein the check valve further comprises a spring, one end of the spring is engaged with the valve seat, the other end of the spring is engaged with the valve shaft, a sealing ring structure is disposed on an outer wall of the valve seat, the spring is used for resetting the valve shaft, the piston on the valve shaft closes the impeller cavity and cuts off the water outlet pipe for check, when the spring is compressed by a force, the piston on the valve shaft opens the impeller cavity, and the water outlet pipe is unobstructed for water outlet.

4. A flow detectable check device as claimed in any of claims 1-3, characterized in that the hall element is arranged in a plane perpendicular to the axis of the valve shaft, the hall element being located in a peripheral space of the valve shaft.

5. The flow detectable no-back device of claim 4, wherein the Hall element is encapsulated in an epoxy potting compound.

6. The flow sensing check device of claim 4, wherein the center of the Hall element is in the same plane as the center of the magnet when the outer end of the valve shaft is in the maximum extended state.

7. A water pump provided with a flow-detectable check device, which comprises a pump housing, wherein a water outlet pipe is arranged on the pump housing, and the water pump is characterized in that the check valve in any one of claims 1 to 6 is arranged in the inner cavity of the water outlet pipe, the Hall element in any one of claims 1 to 6 is arranged in the pipe wall of the water outlet pipe, a magnet is arranged on the valve shaft of the check valve, the valve shaft can move axially relative to the valve seat of the check valve, the magnet is matched with the Hall element, at least the inner end of the Hall element extends into the inner cavity of the water outlet pipe, the check valve is used for water check, and the check valve is matched with the Hall element and is used for detecting the water flow in the water outlet pipe of the pump body.

8. The water pump with the flow-detectable check device as claimed in claim 7, wherein the hall element converts the detected magnetic field of the magnet into an actual voltage value V, and the actual voltage value V can be converted into a water flow Q by detecting the voltage value; the zero point voltage value V0 is adjusted by changing the value of the horizontal distance d between the center of the magnet and the center of the hall element.

9. The water pump with flow rate detectable check device as claimed in claim 7, wherein the center of the magnet is located at a distance L from the proximal end surface of the valve seat, when water flows through the check valve, the water flow exerts a force on the check valve to push the valve core to move toward the water outlet, the value of L changes, the voltage value changes to V1, the voltage value Vf becomes | V1-V0|, when the value of L reaches a maximum value Lmax, the voltage value Vout recovers to V0, when the value of L changes to Lp, the voltage value Vout becomes V0+ Lp/Lmax Vf, and the water flow rate Q becomes (Vout-V0)/Vf.

10. The water pump provided with a flow detectable check device according to claim 9, wherein when the N pole of the magnet faces the water outlet, the voltage sensed by the hall element is Va, when the N pole of the magnet faces the water inlet of the water outlet pipe, the voltage sensed by the hall element is Vb, and the voltage sensed by the hall element is Vf ═ Va-V0| -Vb-V0 | -V1-V0 |.