Flowmeter, control valve and water softening equipment

Abstract

The utility model belongs to the technical field of water treatment, and discloses a flowmeter, a control valve and water softening equipment. The flowmeter comprises a bracket, a pin shaft and an impeller; the pin shaft comprises a first end and a second end, and the first end is fixed to the support. The impeller is arranged outside the pin shaft in a sleeving mode, and the impeller can abut against the second end under the action of water flow so that the impeller and the peripheral face of the pin shaft can be arranged in a spaced mode. When fluid acts on the impeller, the impeller abuts against the second end of the pin shaft so that the impeller can be arranged outside the pin shaft in a suspension and sleeving mode, and the contact area between the impeller and the pin shaft is reduced. And the impeller is abutted against the second end of the pin shaft, so that the contact area of the impeller and the pin shaft is small, and the resistance borne by the impeller when the impeller rotates relative to the pin shaft is small, so that the rotating sensitivity of the impeller is improved, and the flow detection precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water treatment technical field especially relates to a flowmeter, control valve and soft water equipment. BACKGROUND

[0002] The flowmeter includes an impeller, when water flows through the impeller, the water will push the impeller to rotate, the magnet fixed on the impeller will transmit the pulse signal to the sensor, and the sensor will process the pulse signal through the connecting circuit board to calculate the flow.

[0003] At present, the impeller is fixedly connected with the pin shaft to rotate together, the pin shaft is in contact with the pin shaft sleeve arranged thereon and rotates relatively, so that the impeller bears a large resistance and has low rotation sensitivity, thereby affecting the detection accuracy. UTILITY MODEL CONTENTS

[0004] The utility model discloses a flowmeter, control valve and soft water equipment to solve the problem that the impeller bears a large resistance and affects the detection accuracy.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] A flowmeter, comprising:

[0007] A support;

[0008] A pin shaft comprising a first end and a second end, wherein the first end is fixed with the support;

[0009] An impeller, wherein the impeller is arranged outside the pin shaft, and the impeller can abut against the second end under the action of water flow, so that the impeller is arranged in a spaced manner with the outer circumferential surface of the pin shaft.

[0010] As an optional scheme of the above flowmeter, an inner cavity is formed in the impeller, the second end extends into the inner cavity, and the inner diameter of the inner cavity is greater than the outer diameter of the pin shaft;

[0011] And / or, at least one of the impeller and the second end is provided with an arc surface, the arc surface can be tangent to and abut against the other one of the two;

[0012] And / or, the impeller and the second end are in point contact or line contact.

[0013] As an optional scheme of the above flowmeter, the impeller comprises an impeller body and a ball, the inner cavity is arranged in the impeller body, the ball is arranged in the inner cavity, and the second end extends into the inner cavity and can abut against the ball.

[0014] As an optional scheme of the above flowmeter, the ball is fixedly connected with the impeller body.

[0015] Or, the ball and the impeller body form a universal joint.

[0016] As an optional solution of the flow meter, the impeller is spaced apart from the bracket when the impeller abuts against the second end;

[0017] And / or, the impeller is provided with at least one limiting part, which is sleeved on the pin shaft and gap-fitted with the pin shaft.

[0018] As an optional solution of the flow meter, a cavity is formed between the bracket and the impeller, and the side of the bracket away from the impeller is provided with a water passing hole in communication with the cavity;

[0019] And / or, the limiting part is provided with two first and second limiting parts, the first limiting part is located on the side of the second limiting part facing the second end, and the fitting gap between the first limiting part and the pin shaft is smaller than the fitting gap between the second limiting part and the pin shaft.

[0020] And / or, one of the bracket and the impeller is provided with an annular groove extending along the circumference of the pin shaft, and the other is provided with an annular flange extending along the circumference of the pin shaft, the annular flange extends into the annular groove and can rotate relative to the annular groove.

[0021] As an optional solution of the flow meter, the pin shaft comprises a first limiting surface, and the impeller is fixed with a first limiting part, when the flow meter is in the first state, the first limiting part is spaced apart from the first limiting surface, and the impeller is spaced apart from the bracket; when the flow meter is in the second state, the first limiting part abuts against the first limiting surface in the direction from the second end to the first end, so that the impeller is spaced apart from the bracket.

[0022] As an optional solution of the flow meter, the first limiting part is interference-fitted with the inner cavity of the impeller, and / or the first limiting part is sleeved on the pin shaft, and the inner diameter of the first limiting part is greater than the outer diameter of the pin shaft at the fitting position.

[0023] As an optional solution of the flow meter, the pin shaft comprises a second limiting surface, and the impeller is fixed with a second limiting part, the second limiting part can abut against the second limiting surface in the direction from the first end to the second end, so as to limit the impeller from falling off the pin shaft.

[0024] As an optional solution of the flow meter, the second limiting part comprises an elastic arm and a protrusion, the elastic arm extends along the axial direction of the pin shaft and is arranged in a spaced manner with the outer circumferential surface of the pin shaft, and the protrusion is arranged on the side of the elastic arm facing the outer circumferential surface of the pin shaft, and the protrusion can abut against the second limiting surface.

[0025] And / or, the second limiting part further comprises a fixing sleeve, the fixing sleeve is sleeved outside the pin shaft, and the inner diameter of the fixing sleeve is greater than the outer diameter of the pin shaft.

[0026] As an optional solution of the flow meter, the flow meter further comprises a trigger arranged on the impeller and a sensor arranged on the support, and the sensor can sense the trigger.

[0027] As an optional solution of the flow meter, the trigger is a multi-stage magnet.

[0028] And / or, the impeller comprises a rotating part and a blade connected with the rotating part, the trigger is sleeved on the rotating part, or the trigger is arranged on the blade.

[0029] And / or, the support is provided with a containing groove, one end of the impeller extends into the containing groove, and the trigger is located in the containing groove.

[0030] A control valve comprises a valve body and a flow meter as described above, the support is connected with the valve body, and the impeller is located in the valve body.

[0031] As an optional solution of the control valve, the control valve further comprises a fixing member, the fixing member detachably connects the support and the valve body, and the axis of the pin shaft coincides with the center line of the flow path in the valve body.

[0032] One of the support and the valve body is provided with a positioning groove, and the other is provided with a positioning block, and the positioning block and the positioning groove can be inserted and fitted in the direction in which the support extends into the valve body.

[0033] And / or, the fixing member passes through the valve body and is inserted and fitted with the support, and the insertion direction of the fixing member is arranged at an angle with the direction in which the support extends into the valve body.

[0034] A water softening device comprises:

[0035] A resin tank for preparing soft water;

[0036] A salt tank for preparing a regeneration solution;

[0037] The control valve, the valve body is communicated with the resin tank, the valve body is provided with raw water inlet, soft water outlet and salt suction port, the salt suction port is communicated with the salt tank, and at least one of the raw water inlet, the soft water outlet and the salt suction port is provided with the flowmeter.

[0038] The utility model discloses beneficial effect has:

[0039] In the flowmeter, the impeller is sleeved outside the pin shaft, the preliminary positioning of the impeller can be realized, when fluid acts on the impeller, the force exerted by the fluid on the impeller is towards the first end direction of the pin shaft, the impeller abuts at the second end of the pin shaft, the stability of the impeller position is maintained, the inner cavity inner wall of the impeller can be spaced apart from the outer periphery of the pin shaft, so that the impeller can be suspended and sleeved outside the pin shaft, the contact area between the impeller and the pin shaft is reduced, because the impeller abuts at the second end of the pin shaft, the contact area between the impeller and the pin shaft is small, the resistance that the impeller receives when rotating relative to the pin shaft is small, thereby the sensitivity of the impeller rotation is improved, and the precision of flow detection is improved.

[0040] The impeller and the second end of the pin shaft are in point contact or line contact, so as to further reduce the contact area and the resistance.

[0041] When the impeller abuts at the second end of the pin shaft, the impeller is spaced apart from the support, so that the impeller only contacts the second end of the pin shaft, and the rest positions are not contacted, thereby the friction force received by the impeller is reduced, and the sensitivity of the impeller rotation is improved.

[0042] The trigger is a multi-stage magnet, which can provide a stable and uniform magnetic field to improve the measurement accuracy.

[0043] The control valve and the soft water equipment adopt the flowmeter, and the precision of flow detection is improved. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is the structural schematic diagram of the control valve provided by the utility model,

[0045] Figure 2 It is the structural schematic diagram of the flowmeter provided by the utility model,

[0046] Figure 3 It is the sectional view of the flowmeter provided by the utility model,

[0047] Figure 4 It is the sectional view of the partial structure of the flowmeter provided by the utility model,

[0048] Figure 5 It is the sectional view of the partial structure of the control valve provided by the utility model,

[0049] Figure 6It is the structural schematic view of flowmeter and fixing piece provided by the utility model.

[0050] In the drawing,

[0051] 100, flowmeter; 10, support; 11, containing groove; 12, annular flange; 13, mounting groove; 14, first insertion slot; 15, abutment part; 16, water passage; 20, impeller; 21, impeller main body; 211, water-facing surface; 212, annular groove; 22, ball; 30, pin shaft; 31, first outer diameter section; 32, second outer diameter section; 33, third outer diameter section; 34, fourth outer diameter section; 35, fifth outer diameter section; 40, detection assembly; 41, trigger piece; 42, inductive piece; 50, second limiting part; 51, fixed sleeve; 52, clamping part; 521, elastic arm; 522, protrusion; 60, first limiting part; 61, first guide surface; 62, second guide surface; 70, sealing piece; 200, valve body; 300, fixing piece; 301, cross beam; 302, first insertion arm; 303, second insertion arm. DETAILED DESCRIPTION

[0052] The utility model will be further explained in detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limit the utility model. In addition, it needs to be explained that in order to facilitate the description, only the part related to the utility model is shown in the drawing, not all the structures.

[0053] In the description of the utility model, unless there is explicit definition and limitation, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0054] In the utility model, unless there is explicit definition and limitation, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0055] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0056] As shown in Figure 1 The present embodiment provides a control valve, comprising a valve body 200, a flowmeter 100 connected with the valve body 200, a flow path formed inside the valve body 200, and at least a detection end of the flowmeter 100 located in the flow path to detect the flow of fluid in the flow path.

[0057] As shown in Figure 2 and Figure 3 The flowmeter 100 comprises a bracket 10, a pin shaft 30, an impeller 20, and a detection assembly 40. The pin shaft 30 is arranged on the bracket 10, the impeller 20 is coaxially arranged with the pin shaft 30, the impeller 20 can rotate around the axis of the pin shaft 30 under the drive of the fluid in the flow path, the detection assembly 40 comprises a trigger 41 and a sensor 42, the trigger 41 is arranged on the impeller 20, and the sensor 42 is arranged on the bracket 10. The sensor 42 can sense the trigger 41. When the fluid flows in the flow path, the fluid acts on the impeller 20 to drive the impeller 20 to rotate, the impeller 20 drives the trigger 41 to move to trigger the sensor 42, so as to obtain the flow in the flow path through the signal information of the sensor 42.

[0058] Optionally, the trigger 41 is a magnet, and the sensor 42 can be a Hall sensor. When the impeller 20 rotates, the Hall sensor can obtain pulses by sensing the magnet, so as to obtain the rotation frequency of the impeller 20, and further calculate the fluid flow.

[0059] In other embodiments, the trigger 41 and the sensor 42 can be other structures, as long as the signal detected by the sensor 42 can obtain the flow in the flow path.

[0060] It can be understood that when the flowmeter 100 detects the flow, the resistance received by the impeller 20 when rotating will affect the detection accuracy. In the prior art, the impeller is fixedly connected with the pin shaft, and a pin shaft sleeve is arranged between the pin shaft and the bracket. The pin shaft sleeve and the pin shaft move relative to each other, and the movement resistance between the pin shaft sleeve and the pin shaft is large due to the surface contact between the pin shaft sleeve and the pin shaft, which affects the detection accuracy of the flow.

[0061] To solve the above problems, in the embodiment, the pin shaft 30 includes a first end and a second end arranged in the axial direction, and the first end is fixedly connected with the bracket 10; the impeller 20 is sleeved outside the pin shaft 30 to ensure the coaxiality, and the impeller 20 can abut against the second end of the pin shaft 30 under the action of the water flow in the flow path, so that the impeller 20 can be arranged in a spaced manner with the outer circumferential surface of the pin shaft 30.

[0062] To enable the impeller 20 to abut against the second end under the action of the water flow, the impeller 20 is sleeved on the pin shaft 30 along the flow direction of the water flow, that is, the flow direction of the water flow is the direction in which the second end of the pin shaft 30 points to the first end.

[0063] It can be understood that, to realize the spaced arrangement of the impeller 20 and the outer circumferential surface of the pin shaft 30, the inner diameter of the inner cavity of the impeller 20 is greater than the outer diameter of the pin shaft 30. The impeller 20 is sleeved outside the pin shaft 30, which can realize the preliminary positioning of the impeller 20. When the fluid acts on the impeller 20, the force exerted by the fluid on the impeller 20 is directed towards the first end of the pin shaft 30, so that the impeller 20 abuts against the second end of the pin shaft 30, maintains the stability of the position of the impeller 20, and enables the inner wall of the inner cavity of the impeller 20 to be arranged in a spaced manner with the outer circumferential surface of the pin shaft 30, so that the impeller 20 can be suspended and sleeved outside the pin shaft 30, and the contact area between the impeller 20 and the pin shaft 30 is reduced. Because the impeller 20 abuts against the second end of the pin shaft 30, the contact area between the impeller 20 and the pin shaft 30 is small, and the resistance that the impeller 20 receives when rotating relative to the pin shaft 30 is small, so that the sensitivity of the rotation of the impeller 20 is improved, and more pulses can be obtained by the Hall sensor, so that the accuracy of the flow detection is improved.

[0064] Optionally, the impeller 20 and the second end of the pin shaft 30 are in point contact or line contact, so as to further reduce the contact area and the resistance.

[0065] Optionally, when the flowmeter 100 is in use, the axis of the pin shaft 30 can extend in the vertical direction, so that the gravity of the impeller 20 does not affect the suspended fitting relationship between the impeller 20 and the pin shaft 30, thereby ensuring the smooth rotation of the impeller 20 and improving the rotation sensitivity, and further improving the detection accuracy.

[0066] To enable the inner wall of the impeller 20 to have a small contact area with the second end of the pin shaft 30, at least one of the impeller 20 and the end face of the second end is provided with an arc surface, which is used to be tangent to and abut against the other one, so as to reduce the contact area.

[0067] In the embodiment, the inner cavity of the impeller 20 and the end face of the second end of the pin shaft 30 are both provided with arc surfaces, and the two arc surfaces are tangent to form point contact. On the one hand, the contact area can be reduced, so as to reduce the resistance and improve the flexibility of the rotation of the impeller 20; on the other hand, the arc surface is smooth, and the abutting position of the two arc surfaces can reduce the abrasion, so as to ensure the service life.

[0068] For convenience of introduction, the curved surface of the impeller 20 is taken as a first curved surface, and the curved surface of the second end is taken as a second curved surface. The first curved surface is convex towards the second end, and the second curved surface is convex towards the first curved surface. The first curved surface and the second curved surface can abut to achieve point contact.

[0069] In some other embodiments, one of the first curved surface and the second curved surface is an outer convex surface, and the other is an inner concave surface. The outer convex surface can extend into the inner concave surface, and the curvatures of the outer convex surface and the inner concave surface are different, so that the outer convex surface and the inner concave surface can form point contact.

[0070] In some other embodiments, only one of the impeller 20 and the second end can be provided with a curved surface, and the other can be a flat surface capable of abutting against the curved surface, so as to achieve point contact and reduce frictional resistance. Alternatively, one of the impeller 20 and the second end of the pin shaft 30 has an abutting edge, and the other is provided with an abutting flat surface or an abutting curved surface. The abutting edge abuts against the abutting flat surface or the abutting curved surface to form line contact or point contact.

[0071] In order to ensure the coaxiality of the impeller 20 and the pin shaft 30 during rotation of the impeller 20, the normal direction of the contact position of the impeller 20 and the second end coincides with the axis of the pin shaft 30, so that the impeller 20 can abut against the pin shaft 30 under the action of water flow while ensuring the coaxiality of the impeller 20 and the pin shaft 30, which is conducive to achieving the suspended arrangement of the impeller 20 relative to the pin shaft 30.

[0072] In this embodiment, the impeller 20 includes an impeller body 21 and a ball 22. The impeller body 21 is provided with an inner cavity, and the ball 22 is arranged in the inner cavity. The second end of the pin shaft 30 extends into the inner cavity and can abut against the ball 22. The ball 22 is separately arranged from the impeller body 21. The spherical surface of the ball 22 forms the first curved surface, so that the ball 22 is the contact and wear position. The ball 22 can be made of a more wear-resistant material, without the need to upgrade the overall material of the impeller 20, which is conducive to cost control and can replace only the ball 22 according to the use of the ball 22, thereby reducing maintenance costs.

[0073] In order to facilitate the fixation of the ball 22, the impeller body 21 is provided with a groove, and the ball 22 is embedded in the groove to fix the ball 22. The structure is simple and convenient to disassemble and assemble.

[0074] In this embodiment, the ball 22 is fixedly connected with the impeller body 21, and the ball 22 can rotate with the impeller body 21, so that the ball 22 forms a point contact with the second end of the pin shaft 30. In other embodiments, the ball 22 can form a universal joint with the impeller body 21, that is, the ball 22 can freely rotate in the groove, and when the impeller body 21 rotates under the action of the water flow, the ball 22 can rotate relative to the second end and / or the impeller body 21, so that the ball 22 and the second end and the ball 22 and the impeller body 21 are in rolling friction. Although the rolling friction between the ball 22 and the impeller body 21 is increased compared to the ball 22 fixedly arranged on the impeller body 21, the friction between the ball 22 and the second end is changed from sliding friction to rolling friction, which is also beneficial to improve the flexibility of the rotation of the impeller 20.

[0075] Optionally, the ball 22 can be made of metal, ceramic, glass or rubber, or other composite materials, and the specific material can be selected according to actual needs.

[0076] To avoid the contact between the support 10 and the impeller 20 increasing the resistance when the impeller 20 rotates, when the impeller 20 abuts against the second end of the pin shaft 30, the impeller 20 is spaced apart from the support 10 to avoid increasing the contact area with the impeller 20, thereby avoiding increasing the resistance.

[0077] To ensure that the impeller 20 can be suspended and matched with the pin shaft 30 when rotating, at least one limiting portion is arranged in the impeller 20, the limiting portion is sleeved on the pin shaft 30, and the limiting portion is gap matched with the pin shaft 30. Through the gap matching between the limiting portion and the pin shaft 30, the coaxiality of the impeller 20 and the pin shaft 30 is beneficial to be ensured, the stability of the position of the impeller 20 can be ensured on the basis of the abutment between the ball 22 and the second end of the pin shaft 30, the gap matching between the inner wall of the impeller 20 and the outer circumferential surface of the pin shaft 30 and the gap matching between the limiting portion and the pin shaft 30 are beneficial to be realized, so that the impeller 20 only contacts the second end of the pin shaft 30, and the rest positions are all free of contact, thereby reducing the friction force received by the impeller 20, and the sensitivity of the rotation of the impeller 20 is improved.

[0078] In some embodiments, the limiting portion is provided with two, which are a first limiting portion 60 and a second limiting portion 50, and the first limiting portion 60 is arranged on the side of the second limiting portion 50 facing the second end, so as to improve the limiting effect of the two limiting portions on the impeller 20.

[0079] It can be understood that since the impeller 20 is suspended and sleeved on the pin shaft 30, the positioning accuracy of the position of the impeller 20 close to the second end is relatively poor, in order to improve the stability of the rotation of the impeller 20, in some embodiments, the gap matching between the first limiting portion 60 and the pin shaft 30 is smaller than the gap matching between the second limiting portion 50 and the pin shaft 30, so as to improve the positioning effect of the end of the impeller 20 close to the second end.

[0080] Optionally, the fitting gap between the first limiting part 60 and the pin shaft 30 can be 0.1-0.2mm, for example, 0.15mm; the fitting gap between the second limiting part 50 and the pin shaft 30 can be 0.2-0.3mm, for example, 0.25mm.

[0081] To improve the coaxiality of the impeller 20 and the pin shaft 30, and thus ensure the stability of the impeller 20 during rotation, as shown in Figure 4 The bracket 10 is rotationally fitted with the impeller 20 to improve the limiting of the impeller 20 by the bracket 10, so as to ensure the stability of the impeller 20 and the fitting accuracy with the pin shaft 30.

[0082] As shown in Figure 4 The bracket 10 is provided with an annular flange 12 extending along the circumference of the pin shaft 30, and the impeller body 21 is provided with an annular groove 212 extending along the circumference of the pin shaft 30, the annular flange 12 is arranged in the annular groove 212 and can rotate relative to the annular groove 212, through the cooperation of the annular flange 12 and the annular groove 212, the rotation direction of the impeller body 21 is guided, so as to ensure the coaxiality of the impeller 20 and the pin shaft 30.

[0083] In other embodiments, the annular flange 12 can be arranged on the impeller body 21, and correspondingly, the annular groove 212 is arranged on the bracket 10, and the rotation direction of the impeller body 21 can also be guided through the cooperation of the annular flange 12 and the annular groove 212, so as to ensure the coaxiality of the impeller 20 and the pin shaft 30.

[0084] To reduce the resistance of the impeller 20 during rotation, the annular flange 12 and the annular groove 212 can be arranged in a spaced manner to avoid contact between the annular flange 12 and the annular groove 212, so that the impeller 20 can not contact the bracket 10 during rotation, thereby reducing the resistance of the impeller 20 and making the rotation of the impeller 20 more sensitive.

[0085] Specifically, when the impeller 20 abuts against the second end of the pin shaft 30 under the action of water flow, the annular flange 12 and the bottom surface of the annular groove 212 are arranged in a spaced manner, and the annular flange 12 and the opposite two annular side walls of the annular groove 212 are arranged in a spaced manner, so that the impeller 20 can not contact the bracket 10 at all, thereby reducing the resistance of the impeller 20 during rotation.

[0086] In some other embodiments, the annular flange 12 can be spaced apart from the bottom surface of the annular groove 212, that is, the annular flange 12 can be in contact with the annular inner walls on opposite sides of the annular groove 212 to improve the stability of the impeller 20. Alternatively, the annular flange 12 is in contact with the bottom surface of the annular groove 212 but is spaced apart from the annular inner walls on opposite sides of the annular groove 212 to reduce the contact area and thus reduce the resistance when the impeller 20 rotates. By the clearance fit between the annular flange 12 and the annular inner walls on opposite sides of the annular groove 212, it is beneficial to achieve the floating fit of the impeller 20 and the pin shaft 30.

[0087] In some embodiments, the clearance fit between the annular flange 12 and the annular inner walls on opposite sides of the annular groove 212 can be smaller than the clearance fit between the limiting portion and the pin shaft 30 to facilitate the assembly of the impeller 20 and the pin shaft 30 and avoid interference to make the assembly difficult and additionally increase the positions in contact with the impeller 20.

[0088] Optionally, the clearance fit between the annular flange 12 and the annular groove 212 is 0.25mm-0.35mm, for example, 0.3mm.

[0089] It can be understood that the spacing between the annular flange 12 and the bottom surface of the annular groove 212 can be achieved by the abutment of the sphere 22 and the pin shaft 30. By the abutment of the sphere 22 and the second end of the pin shaft 30, the relative position between the impeller body 21 and the bracket 10 can be limited, thereby avoiding the contact between the annular flange 12 and the bottom surface of the annular groove 212.

[0090] To avoid the wear of the sphere 22 causing the contact between the impeller body 21 and the bracket 10, the first limiting surface is arranged on the pin shaft 30, and the first limiting portion 60 is fixed in the impeller 20. When the flowmeter 100 is in the first state, the first limiting portion 60 is spaced apart from the first limiting surface. When the flowmeter 100 is in the second state, the first limiting portion 60 abuts against the first limiting surface from the direction in which the second end points to the first end, so that the annular flange 12 is spaced apart from the bottom surface of the annular groove 212, thereby avoiding the contact between the impeller body 21 and the bracket 10.

[0091] It should be noted that the first state means that the flowmeter 100 is in a normal working state, the sphere 22 and the second end do not have large wear, and the abutment of the sphere 22 and the second end can make the impeller body 21 and the bracket 10 spaced apart, and the first limiting portion 60 and the first limiting surface are spaced apart without contact. The second state means that the flowmeter 100 is in an abnormal state, for example, the sphere 22 and the second end have large wear, or there is a large assembly error, etc. At this time, when the sphere 22 and the second end abut, the impeller body 21 moves a certain distance relative to the first state in the direction of the first end of the pin shaft 30, so that the first limiting portion 60 abuts against the first limiting surface to ensure that the impeller body 21 and the bracket 10 are spaced apart without contact.

[0092] Optionally, the first limiting part 60 is located on the side of the first limiting surface along the circumference of the pin 30 near the second end, so as to restrict the movement of the impeller body 21 toward the first end of the pin 30, thereby preventing the impeller body 21 from contacting the bracket 10.

[0093] like Figure 4 As shown, the pin 30 includes a first outer diameter section 31 and a second outer diameter section 32 connected sequentially in the direction from the second end to the first end. The outer diameter of the second outer diameter section 32 is larger than the outer diameter of the first outer diameter section 31. The outer diameter of the second outer diameter section 32 gradually increases in the direction away from the first outer diameter section 31. The outer circumferential surface of the second outer diameter section 32 is the first limiting surface.

[0094] In some other embodiments, the outer diameter of the second outer diameter section 32 is equal to that of the pin 30 along the axial direction, that is, the second outer diameter section 32 is an equal diameter section. The axial end face of the second outer diameter section 32 connecting the first outer diameter section 31 forms a first limiting surface, which can also cooperate with the first limiting part 60 so that the bottom surface of the annular flange 12 and the annular groove 212 are spaced apart.

[0095] It should be noted that when the water flows through the flow path and the ball 22 or the pin 30 is not severely worn, the first limiting part 60 and the first limiting surface are spaced apart to avoid contact between the two and increase the rotational resistance of the impeller body 21.

[0096] In this embodiment, the first limiting part 60 is sleeved on the pin 30, and the inner wall of the first limiting part 60 is spaced apart from the pin 30 to avoid the first limiting part 60 contacting the pin 30 when rotating with the impeller body 21, thereby increasing friction and reducing the resistance experienced by the impeller body 21. Specifically, the first limiting part 60 is sleeved on the first outer diameter section 31 of the pin 30, and the inner diameter of the first limiting part 60 is larger than the outer diameter of the first outer diameter section 31.

[0097] In some embodiments, a first guide surface 61 is provided at one end of the inner wall of the first limiting part 60 facing the first end. The distance between the first guide surface 61 and the outer peripheral surface of the pin 30 gradually increases along the direction from the second end to the first end, so as to facilitate the assembly of the pin 30 and the first limiting part 60 while improving the coaxiality of the impeller body 21 and the pin 30.

[0098] In some other embodiments, when fluid passes through the flow meter 100, the first guide surface 61 on the first limiting part 60 abuts against the first limiting surface, which can ensure the coaxiality of the impeller 20 and the pin 30 by only increasing the small contact area between the pin 30 and the impeller 20, thereby ensuring the stability of the impeller 20.

[0099] To facilitate assembly of the first limiting portion 60 and the impeller main body 21, an outer wall of an end of the first limiting portion 60 facing the ball 22 is provided with a second guide surface 62. In a direction from the first end to the second end, the distance between the second guide surface 62 and the outer circumferential surface of the pin shaft 30 gradually decreases, so that the outer diameter of the end of the first limiting portion 60 facing the ball 22 gradually decreases, facilitating assembly of the first limiting portion 60 into the impeller main body 21.

[0100] To facilitate fixation of the first limiting portion 60 and the impeller 20, the first limiting portion 60 is fixed in the inner cavity of the impeller 20 in an interference fit, so as to simplify the structure and reduce the cost. In other embodiments, the first limiting portion 60 is fixed in the inner cavity of the impeller main body 21 in a threaded connection, facilitating disassembly.

[0101] Since the impeller main body 21 is not connected to the support 10, in order to avoid the impeller main body 21 moving along the axial direction of the pin shaft 30 and disengaging from the pin shaft 30, the pin shaft 30 further comprises a second limiting surface, and the impeller 20 is fixedly provided with a second limiting portion 50, which can abut against the second limiting surface in a direction from the first end to the second end, thereby limiting the impeller main body 21 from continuing to move in the direction of the second end, so as to avoid disengagement of the impeller 20 from the pin shaft 30.

[0102] The pin shaft 30 comprises a fourth outer diameter section 34 and a fifth outer diameter section 35, which are arranged in a direction from the second end to the first end, and the outer diameter of the fourth outer diameter section 34 is greater than that of the fifth outer diameter section 35, so that the fourth outer diameter section 34 is formed with a second limiting surface, and the second limiting portion 50 abuts against the fourth outer diameter section 34, which can block the impeller 20 from continuing to move in the direction of the second end, so as to avoid disengagement of the impeller 20 from the pin shaft 30.

[0103] In this embodiment, the fourth outer diameter section 34 is a variable diameter section, and the outer diameter of the fourth outer diameter section 34 gradually increases in a direction from the first end to the second end, and the outer circumferential surface of the fourth outer diameter section 34 forms the second limiting surface. This arrangement facilitates disassembly of the impeller 20 when needed, by guiding through the second limiting surface to reduce the difficulty of disassembly.

[0104] In some other embodiments, the fourth outer diameter section 34 can be a constant diameter section, i.e., the outer diameter of the fourth outer diameter section 34 is constant along the axial direction, and in this case, the axial end surface of the fourth outer diameter section 34 connecting the fifth outer diameter section 35 forms the second limiting surface.

[0105] In this embodiment, the pin shaft 30 further comprises a third outer diameter section 33 connecting the second outer diameter section 32 and the fourth outer diameter section 34, and the outer diameter of the third outer diameter section 33 is constant along the axial direction, so as to simplify the structure of the pin shaft 30 and reduce the cost.

[0106] To facilitate the assembly of the flowmeter 100, the second limiting portion 50 comprises a clamping portion 52, the clamping portion 52 comprises an elastic arm 521 and a protrusion 522, the elastic arm 521 extends along the axial direction of the pin shaft 30 and is arranged in a spaced manner with the outer circumferential surface of the pin shaft 30 to avoid interference between the elastic arm 521 and the pin shaft 30 when the impeller body 21 rotates, and the protrusion 522 is arranged on the side of the elastic arm 521 facing the outer circumferential surface of the pin shaft 30, and the protrusion 522 can abut against the second limiting surface. By arranging the elastic arm 521, when assembling the impeller 20 and the pin shaft 30, the elastic arm 521 can be deformed by the abutting tendency of the protrusion 522 and the pin shaft 30, so that the protrusion 522 can move to the position where the fourth outer diameter section 34 is located through the third outer diameter section 33, thereby simplifying the assembly difficulty and facilitating disassembly and assembly.

[0107] In addition, the second outer diameter section 32 is designed as a variable diameter section, and the outer circumferential surface of the second outer diameter section 32 can guide the protrusion 522, thereby reducing the assembly difficulty.

[0108] Optionally, the second limiting portion 50 comprises at least two clamping portions 52, and the at least two clamping portions 52 are arranged in a spaced manner along the circumferential direction of the pin shaft 30 to increase the anti-falling effect on the impeller 20.

[0109] To facilitate the fixation of the at least two clamping portions 52 and the impeller body 21, the second limiting portion 50 further comprises a fixing sleeve 51, the fixing sleeve 51 is connected with the impeller body 21 and is sleeved outside the pin shaft 30, and the elastic arm 521 is connected with the axial end of the fixing sleeve 51. By arranging the fixing sleeve 51, the at least two clamping portions 52 can be connected as a whole, thereby facilitating the connection between the second limiting portion 50 and the impeller body 21.

[0110] In the embodiment, the fixing sleeve 51 is fixed in an interference fit with the impeller body 21 to simplify the structure and reduce the cost. In other embodiments, the fixing sleeve 51 is fixed in a threaded connection with the inner cavity of the impeller body 21 to facilitate disassembly and assembly.

[0111] In the embodiment, the impeller body 21 comprises a rotating portion and blades connected with the rotating portion, the trigger 41 is arranged on the rotating portion, and the shape of the rotating portion is more regular than that of the blades. Arranging the trigger 41 on the rotating portion is conducive to reducing the assembly difficulty and improving the assembly precision, thereby improving the detection accuracy of the flowmeter 100.

[0112] In some other embodiments, the trigger 41 can be arranged on the blades, and the cooperation with the inductor 42 can also be achieved.

[0113] To improve the detection accuracy of the flowmeter 100, in the embodiment, the trigger 41 is a multi-stage magnet. The multi-stage magnet refers to a multi-pole structure composed of a plurality of magnets arranged in a specific manner, which can provide a stable and uniform magnetic field to improve the measurement accuracy.

[0114] Optionally, the number of magnetic poles of the multi-stage magnet can be greater than or equal to 4 to obtain better measurement accuracy.

[0115] Optionally, the trigger 41 can be annular and sleeved outside the impeller 20 to shorten the distance between the trigger 41 and the inductor 42 on the support 10, thereby facilitating induction and improving detection accuracy. Specifically, the trigger 41 is sleeved outside the rotating part.

[0116] As shown in Figure 3 , the support 10 is provided with a mounting groove 13, and the inductor 42 is arranged in the mounting groove 13. On the one hand, the inductor 42 is protected by the support 10 to avoid damage or contact with water. On the other hand, the distance between the inductor 42 and the trigger 41 can be shortened, thereby improving detection accuracy.

[0117] In some embodiments, a cavity is formed between the support 10 and the impeller 20, and the support 10 is provided with a water passing hole 16 communicating with the cavity. Figure 3 and Figure 4 As shown in , after the impeller 20 is assembled with the pin shaft 30, the impeller 20 will form a cavity with the mounting groove 13 on the support 10. The cavity is in communication with the flow path through the cooperation gap between the annular flange 12 and the annular groove 212, so that the water in the flow path will enter the cavity. By providing the water passing hole 16, the water entering the cavity can flow out through the water passing hole 16, avoiding the water entering the cavity from affecting the stability of fluid flow, thereby avoiding the influence of fluid flow on the stability of the impeller 20, and facilitating to ensure that the impeller 20 does not contact other positions except the second end, thereby ensuring the flexibility of the rotation of the impeller 20.

[0118] Optionally, the water passing hole 16 is arranged on the side of the support 10 away from the impeller 20, so that the water entering the cavity can directly flow out through the water passing hole 16.

[0119] In some embodiments, the support 10 is provided with a containing groove 11, and one end of the impeller 20 extends into the containing groove 11. Through the nested cooperation of the impeller 20 and the support 10, the positioning effect of the impeller 20 can be achieved, which is beneficial to improve the position accuracy of the impeller 20.

[0120] In some embodiments, the trigger 41 is located in the containing groove 11 to avoid exposure of the trigger 41, thereby achieving the effect of protecting the trigger 41.

[0121] Figure 4 To ensure that the impeller 20 can maintain stable position under the action of water flow when the water flow passes through the flowmeter 100, and realize the suspended cooperation with the pin shaft 30, in combination with Figure 5 , the trigger 41 is arranged on the side of the support 10 away from the impeller 20, so that the water entering the cavity can directly flow out through the water passing hole 16.As shown, the impeller 20 includes a water-facing surface 211 facing the water flow, the water-facing surface 211 being a surface of revolution with the axis of the pin shaft 30 as the center, and the cross-sectional area of the water-facing surface 211 gradually increasing along the water flow direction. This arrangement enables the water-facing surface 211 to uniformly disperse the water flow and achieve a good flow guiding effect, avoiding disturbance to the water flow pattern and affecting the normal flow of the water flow in the flow path; and the water flow acting force on the water-facing surface 211 is uniform, which is conducive to ensuring that the impeller main body 21 and the pin shaft 30 are coaxial.

[0122] To facilitate the impeller 20 to extend into the valve body 200, the valve body 200 is provided with a mounting port in communication with the flow path, and the bracket 10 is sealingly arranged in the mounting port, so that the impeller 20 can be located in the flow path.

[0123] To achieve sealing cooperation, a sealing member 70 is arranged between the bracket 10 and the mounting port, the sealing member 70 is extruded by the bracket 10 and the mounting port, and the sealing member 70 is elastically deformed to block the gap between the bracket 10 and the mounting port, so as to achieve the purpose of sealing.

[0124] To avoid the position of the sealing member 70 moving and affecting the sealing effect, a sealing groove is arranged on the bracket 10, the sealing member 70 is sleeved outside the bracket 10 and located in the sealing groove, so as to fix the position of the sealing member 70.

[0125] In other embodiments, the sealing groove can be arranged on the inner wall of the mounting port, which can also achieve the purpose of fixing the sealing member 70 to ensure the sealing effect.

[0126] Optionally, the sealing member 70 is a sealing ring, which has simple structure, low cost and reliable sealing.

[0127] To facilitate the fixing of the flowmeter 100 and the valve body 200, in combination with Figure 1 , Figure 5 and Figure 6 As shown, the control valve further includes a fixing member 300, the fixing member 300 being used to detachably connect the bracket 10 and the valve body 200, so as to avoid the flowmeter 100 from falling off the valve body 200, and facilitate disassembly and maintenance.

[0128] In addition, the fixing member 300 can fix the relative position of the bracket 10 and the valve body 200, so as to ensure the position accuracy of the impeller 20 and the pin shaft 30 in the flow path, and ensure that the axis of the impeller 20 and the pin shaft 30 coincides with the center line of the flow path.

[0129] Optionally, the fixing member 300 can pass through the valve body 200 and be inserted into the bracket 10, the insertion direction of the fixing member 300 and the bracket 10 and the direction in which the bracket 10 extends into the valve body 200 are at an angle, so as to prevent the flowmeter 100 from falling off. By the insertion of the fixing member 300 into the bracket 10, not only the flowmeter 100 can be fixed, but also the size of the bracket 10 extending into the flow channel can be limited, which is beneficial to ensure that the axis of the impeller 20 and the pin shaft 30 coincides with the center line of the flow path.

[0130] Optionally, as shown in Figure 6 the fixing member 300 includes a cross beam 301 and a first insertion arm 302 connected to both ends of the cross beam 301, the cross beam 301 and the two first insertion arms 302 are connected and substantially form a U shape, the outer wall of the bracket 10 is provided with a first insertion slot 14, the inner wall of the mounting port is provided with a second insertion slot, the first insertion slot 14 and the second insertion slot cooperate to form a insertion hole, and the first insertion arm 302 can be inserted into the insertion hole to limit the bracket 10 from being separated from the valve body 200.

[0131] In the embodiment, the extension direction of the insertion hole is perpendicular to the opening direction of the mounting port, so as to fix the bracket 10 and the valve body 200. In other embodiments, the extension direction of the insertion hole can be at an acute angle or an obtuse angle with the opening direction of the mounting port.

[0132] In order to improve the fixing effect of the bracket 10 and the valve body 200, the two first insertion arms 302 cooperate to clamp the bracket 10. Specifically, the distance between the two first insertion arms 302 is less than the minimum size of the bracket 10 at the first insertion slot 14, so that after the fixing member 300 cooperates with the valve body 200 and the bracket 10, the two first insertion arms 302 are deformed to clamp the bracket 10, thereby improving the fixing effect of the bracket 10 and the valve body 200.

[0133] Optionally, the cross beam 301 further connects a second insertion arm 303, the second insertion arm 303 is located between the two first insertion arms 302, and the second insertion arm 303 can pass through the valve body 200 and be inserted into the bracket 10, so as to improve the fixing effect of the bracket 10.

[0134] Optionally, the first insertion slot 14 is an annular slot, and the second insertion arm 303 cooperates with the first insertion slot 14.

[0135] Optionally, the bracket 10 is provided with a positioning slot, and the valve body 200 is provided with a positioning block, the positioning block and the positioning slot are inserted and matched along the direction in which the bracket 10 extends into the valve body 200. When the bracket 10 is installed into the valve body 200, the angle of the bracket 10 is adjusted so that the positioning block is aligned with the positioning slot, so that the inserted and matched positioning block and the positioning slot are realized when the bracket 10 is installed, and the operation is convenient. Through the cooperation of the positioning slot and the positioning block, on the one hand, the bracket 10 can be extended into the valve body 200 at a unique angle, and on the other hand, the size of the bracket 10 extending into the valve body 200 can be limited through the cooperation of the positioning slot and the positioning block, and the axis of the pin shaft 30 is guaranteed to coincide with the center line of the flow path through the cooperation of the above two aspects.

[0136] Optionally, the bracket 10 is provided with two abutting portions 15 which are oppositely arranged, and the positioning slot is surrounded between the two abutting portions 15, the abutting portion 15 is located outside the valve body 200, and can abut with the valve body 200, so as to limit the size of the bracket 10 extending into the valve body 200, improve the position accuracy of the impeller 20 in the flow path, and be beneficial to guarantee that the axis of the pin shaft 30 coincides with the center line of the flow path, so as to guarantee the detection accuracy.

[0137] The embodiment also provides a water softening device, which comprises a resin tank, a salt tank and the control valve, the valve body 200 of the control valve is connected with the resin tank, the valve body 200 is provided with a raw water inlet, a soft water outlet and a salt suction port, the raw water inlet is used for feeding raw water, the soft water outlet is used for outputting soft water, and the salt suction port is used for connecting the salt tank so as to feed a regeneration salt solution into the resin tank, and at least one of the raw water inlet, the soft water outlet and the salt suction port is provided with the control valve or the flowmeter 100, so as to improve the flow detection accuracy.

[0138] Obviously, the above embodiment of the utility model is only for clear illustration of the utility model, and is not a limitation on the embodiment of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A flow meter, characterized by, The utility model relates to a flowmeter, comprising: a bracket (10); a pin shaft (30) comprising a first end and a second end, the first end being fixed with the bracket (10); a impeller (20) sleeved outside the pin shaft (30), the impeller (20) can abut against the second end under the action of water flow, so that the impeller (20) can be spaced apart from the outer circumferential surface of the pin shaft (30).

2. The flow meter of claim 1, wherein, An inner cavity is formed in the impeller (20), the second end extends into the inner cavity, and the inner diameter of the inner cavity is greater than the outer diameter of the pin shaft (30); And / or, at least one of the impeller (20) and the second end is provided with a curved surface, which can be tangent to and abut against the other one of the two; And / or, the impeller (20) and the second end are in point contact or line contact.

3. The flow meter of claim 2, wherein, The impeller (20) comprises an impeller body (21) and a ball (22), the inner cavity is arranged in the impeller body (21), the ball (22) is arranged in the inner cavity, and the second end extends into the inner cavity and can abut against the ball (22).

4. The flow meter of claim 3, wherein, The ball (22) is fixedly connected with the impeller body (21); Or, the ball (22) and the impeller body (21) form a universal joint.

5. The flow meter of any one of claims 1-4, wherein, When the impeller (20) abuts against the second end, the impeller (20) is spaced apart from the bracket (10); And / or, the impeller (20) is provided with at least one limiting part, the limiting part is sleeved on the pin shaft (30) and is in clearance fit with the pin shaft (30).

6. The flow meter of claim 5, wherein, A cavity is formed between the bracket (10) and the impeller (20), and a water passing hole (16) in communication with the cavity is arranged on the side of the bracket (10) away from the impeller (20); And / or, the limiting part is provided with two first limiting parts (60) and second limiting parts (50), the first limiting part (60) is located on the side of the second limiting part (50) facing the second end, and the fitting clearance between the first limiting part (60) and the pin shaft (30) is smaller than the fitting clearance between the second limiting part (50) and the pin shaft (30); And / or, one of the bracket (10) and the impeller (20) is provided with an annular groove (212) extending along the circumference of the pin shaft (30), and the other is provided with an annular flange (12) extending along the circumference of the pin shaft (30), the annular flange (12) extends into the annular groove (212) and can rotate relative to the annular groove (212).

7. The flow meter of claim 5, wherein, The pin shaft (30) comprises a first limiting surface, the impeller (20) is fixedly provided with a first limiting part (60), when the flowmeter is in a first state, the first limiting part (60) is spaced apart from the first limiting surface, and the impeller (20) is spaced apart from the bracket (10); when the flowmeter is in a second state, the first limiting part (60) abuts against the first limiting surface in the direction of the second end pointing to the first end, so that the impeller (20) is spaced apart from the bracket (10).

8. The flow meter of claim 7, wherein, The first limiting part (60) is in interference fit with the inner cavity of the impeller (20), and / or the first limiting part (60) is sleeved on the pin shaft (30), and the inner diameter of the first limiting part (60) is greater than the outer diameter of the pin shaft (30) at the fitting position.

9. The flow meter of any one of claims 1-4, wherein, The pin shaft (30) comprises a second limiting surface, and the impeller (20) is internally fixed with a second limiting part (50), the second limiting part (50) can abut against the second limiting surface in the direction from the first end to the second end, so as to limit the impeller (20) from falling off the pin shaft (30).

10. The flow meter of claim 9, wherein, The second limiting part (50) comprises an elastic arm (521) and a protrusion (522), the elastic arm (521) extends along the axial direction of the pin shaft (30) and is arranged in spaced apart relationship with the outer peripheral surface of the pin shaft (30), and the protrusion (522) is arranged on the side of the elastic arm (521) facing the outer peripheral surface of the pin shaft (30), and the protrusion (522) can abut against the second limiting surface; And / or, the second limiting part (50) further comprises a fixing sleeve (51), the fixing sleeve (51) is sleeved on the outside of the pin shaft (30), and the inner diameter of the fixing sleeve (51) is greater than the outer diameter of the pin shaft (30).

11. The flow meter of any one of claims 1-4, wherein, The flowmeter further comprises a trigger (41) arranged on the impeller (20) and a sensing part (42) arranged on the support (10), and the sensing part (42) can sense the trigger (41).

12. The flow meter of claim 11, wherein, The trigger (41) is a multi-stage magnet; And / or, the impeller (20) comprises a rotating part and a blade connected with the rotating part, the trigger (41) is sleeved on the rotating part, or the trigger (41) is arranged on the blade; And / or, the support (10) is provided with a containing groove (11), one end of the impeller (20) extends into the containing groove (11), and the trigger (41) is located in the containing groove (11).

13. A control valve characterized by comprising: The control valve further comprises a fixing part (300), the fixing part (300) detachably connects the support (10) and the valve body (200), and the axis of the pin shaft (30) coincides with the center line of the flow path in the valve body (200); 14. The control valve of claim 13, wherein, One of the support (10) and the valve body (200) is provided with a positioning groove, and the other is provided with a positioning block, the positioning block and the positioning groove can be inserted and fitted in the direction that the support (10) extends into the valve body (200); And / or, the fixing part (300) passes through the valve body (200) and is inserted and fitted with the support (10), and the insertion direction of the fixing part (300) is arranged at an angle with the direction that the support (10) extends into the valve body (200). The control valve comprises:

15. A water softening apparatus characterised in that, A resin tank for preparing soft water; A salt tank for preparing a regeneration solution; ​ The control valve according to claim 13 or 14, wherein the valve body (200) is in communication with the resin tank, and the valve body (200) is provided with a raw water inlet, a soft water outlet and a salt suction port, the salt suction port is in communication with the salt tank, and at least one of the raw water inlet, the soft water outlet and the salt suction port is provided with the flow meter.

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