CN219570954U - Multi-way valve for water quality on-line detection instrument - Google Patents

Abstract

The utility model discloses a multi-way valve for a water quality online detection instrument, which comprises a stator and a rotor, wherein a rotating cavity matched with the rotor is arranged on the stator, the rotor is rotatably arranged in the rotating cavity, a plurality of first flow channels arranged around the rotating cavity are arranged on the side wall of the stator, one end of each first flow channel is communicated with the side wall of the rotating cavity, a second flow channel arranged along the axial direction of the rotor is arranged at one end of the rotor, a communication flow channel is transversely arranged in the rotor, one end of each communication flow channel is communicated with the second flow channel, the other end of each communication flow channel penetrates through the side wall of the rotor, and the communication flow channel is used for being communicated with any first flow channel. According to the utility model, the rotor is arranged in the stator, and the conventional plane contact between the rotor and the stator is changed into the arc surface contact, so that the tightness of the multi-way valve can be ensured without applying pressure to the rotor and the stator, the friction between the rotor and the stator is reduced, and the abrasion is not easy.

Description

Multi-way valve for water quality on-line detection instrument

Technical Field

The utility model relates to the technical field of valves, in particular to the technical field of multi-way valves for water quality on-line detection instruments.

Background

Multiport valves find application in many fields, including medical devices, on-line monitoring of water quality devices such as: COD detector, ammonia nitrogen detector, total phosphorus detector, total nitrogen detector, quality of water sampling equipment such as: the water quality automatic sampler and the like and the oil field metering equipment and the like have the application of multi-way valves. According to different demands, the hole sites of the multi-way valve are also different, and the common examples are: eight-way, ten-way, etc. The multi-way valve is generally arranged on the stepping motor when in use, the stepping motor drives the rotor in the multi-way valve to rotate to a certain angle, so that the runner on the rotor is communicated with the runner on the stator to finish the operation of switching the sample inlet, and the multi-way valve can be matched with the control system to control the stepping motor to achieve the purpose of valve position switching, thereby finishing the operations of reagent mixing, water quality inspection, sewage sample retention and the like. The application of the multi-way valve can greatly improve the working efficiency.

The multi-way valve mainly comprises a public interface and a plurality of switching interfaces, when the multi-way valve is used for equipment sample injection, the switching interfaces are connected with solutions or reagents to be injected, and the public interface is connected with reagent bottles or equipment to be injected; when the multi-way valve is used for reserving samples, the common port is connected with the sample discharging port of the equipment, and the switching port is connected with the sample reserving bottle or the reagent bottle, so that the sample reserving operation can be realized on different sample reserving bottles or reagent bottles.

The contact mode of the rotor and the stator of the valve core of the multi-way valve commonly used in the market at present is plane contact, as shown in figure 10 of the specification attached drawings, the contact mode is required to apply enough pressure on the rotor or the stator to enable the rotor and the stator to be closely attached, so that the tightness of the multi-way valve can be ensured. The mode of exerting pressure generally adopts to install dish spring or spring above the rotor, and this kind of elastic component can take place plastic deformation along with the increase of live time, and elasticity also can slowly reduce, and when elasticity is insufficient, clearance can appear in two planes thereby leak. In addition, the contact mode requires extremely high flatness on two planes of the rotor and the stator, so that the rotor and the stator are tightly attached, the multi-way valve is blocked and cannot be switched, the flatness is too low, and leakage is easy to occur. Because the pressure ratio between the two planes is large, the rotor and the stator are extremely easy to wear, so that the multi-way valve has the defects of short service life, easy leakage and the like.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides a multi-way valve for a water quality on-line detection instrument, which can prolong the service life of the multi-way valve, can be connected with more channels and is more convenient to control.

In order to achieve the above purpose, the utility model provides a multi-way valve for an online water quality detection instrument, which comprises a stator and a rotor, wherein a rotating cavity matched with the rotor is arranged on the stator, the rotor is rotatably arranged in the rotating cavity, a plurality of first flow channels which are arranged around the rotating cavity are arranged on the side wall of the stator, one end of each first flow channel is communicated with the side wall of the rotating cavity, a second flow channel which is arranged along the axial direction of the rotor is arranged at one end of each rotor, a communicating flow channel is transversely arranged in the rotor, one end of each communicating flow channel is communicated with the second flow channel, the other end of each communicating flow channel penetrates through the side wall of the rotor, the communicating flow channel is used for being communicated with any first flow channel, and a control end for controlling the rotation of the communicating flow channel is arranged at one end, far away from the second flow channel, of the rotor.

Preferably, a sealing ring which is used for abutting against the inner wall of the rotary cavity is arranged at the opening position of the communication flow passage.

Preferably, the opening position of the rotating cavity is provided with a cover plate detachably connected with the rotating cavity, and the upper end and the lower end of the rotor are respectively provided with a plane bearing which is in interference fit with the bottom of the rotating cavity and the cover plate.

Preferably, the control end is provided with a stepping driving motor for driving the rotor to rotate.

Preferably, the control end is further provided with a rotary positioning mechanism, the rotary positioning mechanism comprises a photoelectric code disc and a photoelectric switch, the photoelectric code disc and the photoelectric switch are coaxially fixed on the control end, the photoelectric code disc passes through the sensing position of the photoelectric switch, and the photoelectric code disc is provided with a plurality of hollowed-out sensing parts corresponding to the first flow channel.

Preferably, the rotary positioning mechanism further comprises a base fixedly connected with the stator, and the photoelectric code disc and the photoelectric switch are arranged in the base.

Preferably, the coaxiality tolerance of the rotor and the rotating cavity is 0.001-0.003mm.

Preferably, the fit clearance between the rotor side wall and the inner wall of the rotating cavity is 0.002-0.006mm.

The multi-way valve for the water quality on-line detection instrument has the beneficial effects that: according to the utility model, the rotor is arranged in the stator, and the conventional plane contact between the rotor and the stator is changed into the arc surface contact, so that the tightness of the multi-way valve can be ensured without applying pressure to the rotor and the stator, the friction between the rotor and the stator is reduced, and the abrasion is not easy to occur; the hidden trouble caused by plastic deformation of the parts is eliminated without using elastic parts such as disc springs or springs, and the device is convenient to maintain and low in maintenance cost. The rotor or the stator is required to be replaced after the conventional multi-way valve is worn, and the multi-way valve only needs to replace the sealing gasket, has a simple structure and is convenient to maintain; the photoelectric code disc and the photoelectric switch are matched to realize accurate control of the rotor, so that the controllability is higher.

The features and advantages of the present utility model will be described in detail by way of example with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic perspective view of a multi-way valve for an on-line water quality testing apparatus according to the present utility model.

FIG. 2 is a schematic diagram of the front view of a multi-way valve for an on-line water quality testing apparatus according to the present utility model.

FIG. 3 is a schematic top view of a multi-way valve for an on-line water quality testing apparatus according to the present utility model.

FIG. 4 is a schematic view of the cross-sectional structure of the portion A-A in FIG. 3.

FIG. 5 is a schematic view of the sectional structure of the portion B-B in FIG. 3.

FIG. 6 is a schematic view showing the three-dimensional structures of the upper side of the stator and the rotor of the multi-way valve for the water quality on-line detecting instrument.

FIG. 7 is a schematic view showing the three-dimensional structures of the lower side of a stator and a rotor of a multi-way valve for an on-line water quality detecting instrument according to the present utility model.

FIG. 8 is a schematic perspective view of a stator of a multi-way valve for an on-line water quality testing apparatus according to the present utility model.

FIG. 9 is a schematic perspective view of a rotor of a multi-way valve for an on-line water quality testing apparatus according to the present utility model.

Fig. 10 is a schematic diagram of a valve core structure of a multi-way valve commonly used in the market at present in the background art.

Wherein:

1-a stator; 2-rotor; 3-a sealing ring; 4-step driving motor; 5-cover plate; 6-plane bearing; 7-photoelectric code disc; 8-an optoelectronic switch; 9-a base; 11-a rotation chamber; 12-a first flow channel; 21-a second flow channel; 22-communicating the flow passage; 23-control terminal.

Detailed Description

The present utility model will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

In the description of the present utility model, it will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present utility model, it should be noted that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships in which the inventive product is conventionally placed in use, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Examples

Referring to fig. 6, 7, 8 and 9, the multi-way valve for an on-line water quality detecting instrument of the present utility model comprises a stator 1 and a rotor 2, wherein a rotating cavity 11 adapted to the rotor 2 is provided on the stator 1, the rotor 2 is rotatably provided in the rotating cavity 11, ten first flow channels 12 arranged around the rotating cavity 11 are provided on a side wall of the stator 1, one end of each first flow channel 12 is communicated with a side wall of the rotating cavity 11, a second flow channel 21 axially arranged along one end of the rotor 2 is provided, a communicating flow channel 22 is transversely provided in the rotor 2, one end of each communicating flow channel 22 is communicated with the second flow channel 21, the other end of each communicating flow channel 22 penetrates through a side wall of the rotor 2, the communicating flow channel 22 is used for communicating with any of the first flow channel 12, and a control end 23 for controlling rotation of the rotor 2 is provided on an end far away from the second flow channel 21. In the embodiment, the rotor 2 is arranged inside the stator 1, and the conventional plane contact between the rotor 2 and the stator 1 is changed into circular arc surface contact, so that the tightness of the multi-way valve can be ensured without applying pressure to the rotor 2 and the stator 1, the friction between the rotor 2 and the stator 1 is reduced, and the wear is not easy; the hidden danger caused by plastic deformation of parts such as disc springs or springs is eliminated without using elastic parts, the second flow channels 21 are communicated with the main sample injection pipe, corresponding branch pipes are respectively connected to each first flow channel 12, and the communicating flow channels 22 can be controlled to communicate with any first flow channel 12 by controlling the rotation angle of the rotor 2, so that any first flow channel 12 is controlled to communicate with the second flow channel 21, and the requirement of one-to-many can be met.

Referring to fig. 9, a sealing ring 3 for abutting against the inner wall of the rotary chamber 11 is disposed at the opening position of the communication flow passage 22. The sealing ring 3 can improve the tightness and avoid the leakage of liquid through the gap between the side wall of the rotor 2 and the rotating cavity 11.

Preferably, the seal ring 3 is made of a corrosion resistant material such as perfluoroether.

Referring to fig. 4, 5 and 6, a cover plate 5 detachably connected with the rotary cavity 11 is provided at the opening position of the rotary cavity 11, and plane bearings 6 for interference fit with the rotary cavity 11 bottom and the cover plate 5 are provided at the upper and lower ends of the rotor 2. The planar bearing 6 can improve the fluency of the rotor 2, reduce resistance, the cover plate 5 is used for fixing the rotor 2 in the rotating cavity 11, and the second runner 21 is arranged through the cover plate 5.

Examples

Referring to fig. 1, 2, 3, 4 and 5, in order to increase the automation degree of the multi-way valve, the control end 23 is provided with a step driving motor 4 for driving the rotor 2 to rotate on the basis of the first embodiment. The stepping drive motor 4 can freely control the rotation angle of the rotor 2, thereby controlling the second flow passage 21 to communicate with any of the first flow passages 12.

Referring to fig. 1, 2, 3, 4 and 5, the control end 23 is further provided with a rotary positioning mechanism, the rotary positioning mechanism includes a photoelectric encoder 7 and a photoelectric switch 8 coaxially fixed on the control end 23, the photoelectric encoder 7 passes through the sensing position of the photoelectric switch 8, and a plurality of hollowed sensing parts corresponding to the first flow channel 12 are arranged on the photoelectric encoder 7. The photoelectric encoder 7 and the photoelectric switch 8 are matched to realize accurate control of the rotor, so that the second flow channel 21 is controlled to be communicated with any first flow channel 12, and the controllability is higher.

Referring to fig. 1 and 2, the rotary positioning mechanism further includes a base 9 fixedly connected with the stator 1, and the photoelectric encoder 7 and the photoelectric switch 8 are disposed in the base 9. The stepping driving motor 4 is fixedly connected with the seat body 9.

Preferably, the coaxiality tolerance of the rotor 2 and the rotating cavity 11 is 0.002mm.

Preferably, the fit clearance between the side wall of the rotor 2 and the inner wall of the rotating cavity 11 is 0.004mm.

The working process of the utility model comprises the following steps:

in the working process of the multi-way valve for the water quality on-line detection instrument, when the multi-way valve is used, the second flow channels 21 are communicated with the main sample injection pipe, the corresponding branch pipes are respectively connected to each first flow channel 12, the rotor 2 is controlled to rotate through the stepping driving motor 4, the communicating flow channels 22 can be controlled to communicate with any first flow channel 12 through controlling the rotating angle of the rotor 2, and therefore any first flow channel 12 is controlled to communicate with the second flow channel 21.

Standard parts used in the document of the utility model can be purchased from the market, the specific connection modes of all parts adopt conventional means such as mature bolts, rivets and welding in the prior art, the electric sliding rail sliding seat, the air cylinder, the welding machine, the electric telescopic rod and the internal parts of the controller adopt conventional models in the prior art, the internal structure of the electric sliding rail sliding seat, the air cylinder, the welding machine, the electric telescopic rod and the controller belong to the prior art structure, a worker can finish normal operation of the electric sliding rail sliding seat, the electric telescopic rod and the controller according to the manual of the prior art, and the circuit connection adopts the conventional connection modes in the prior art, so that the specific description is not made.

It should be noted that, although the foregoing embodiments have been described herein, the scope of the present utility model is not limited thereby. Therefore, based on the innovative concepts of the present utility model, alterations and modifications to the embodiments described herein, or equivalent structures or equivalent flow transformations made by the present description and drawings, apply the above technical solutions directly or indirectly to other relevant technical fields, all of which are included in the scope of protection of the present patent.

Claims (8)

1. The utility model provides a multiport valve for water quality on-line measuring instrument, includes stator (1) and rotor (2), its characterized in that: be equipped with on stator (1) with rotatory chamber (11) of rotor (2) adaptation, rotor (2) rotatable locate in rotatory chamber (11), stator (1) lateral wall is equipped with a plurality of windings first runner (12) that rotate chamber (11) setting, just first runner (12) one end with rotatory chamber (11) lateral wall intercommunication, rotor (2) one end is equipped with second runner (21) of setting along its axial, transversely be equipped with intercommunication runner (22) in rotor (2), intercommunication runner (22) one end with second runner (21) intercommunication, the other end runs through rotor (2) lateral wall sets up, intercommunication runner (22) be used for with arbitrary first runner (12) intercommunication, be away from on rotor (2) one end of second runner (21) is equipped with control end (23) that are used for controlling its rotation.

2. A multi-way valve for an on-line water quality testing instrument as defined in claim 1, wherein: the opening position of the communication flow passage (22) is provided with a sealing ring (3) which is used for abutting against the inner wall of the rotary cavity (11).

3. A multi-way valve for an on-line water quality testing instrument as defined in claim 1, wherein: the rotary cavity (11) is provided with a cover plate (5) detachably connected with the rotary cavity, and the upper end and the lower end of the rotor (2) are respectively provided with a plane bearing (6) which is used for being in interference fit with the bottom of the rotary cavity (11) and the cover plate (5).

4. A multi-way valve for an on-line water quality testing instrument as defined in claim 1, wherein: the control end (23) is provided with a stepping driving motor (4) for driving the rotor (2) to rotate.

5. A multi-way valve for an on-line water quality testing instrument as defined in claim 1, wherein: the control end (23) is further provided with a rotary positioning mechanism, the rotary positioning mechanism comprises a photoelectric code disc (7) and a photoelectric switch (8) which are coaxially fixed on the control end (23), the photoelectric code disc (7) passes through the sensing position of the photoelectric switch (8), and a plurality of hollowed-out sensing parts corresponding to the first flow channel (12) are arranged on the photoelectric code disc (7).

6. A multi-way valve for an on-line water quality testing instrument as defined in claim 5, wherein: the rotary positioning mechanism further comprises a base body (9) fixedly connected with the stator (1), and the photoelectric code disc (7) and the photoelectric switch (8) are arranged in the base body (9).

7. A multi-way valve for an on-line water quality testing instrument as defined in claim 1, wherein: the coaxiality tolerance of the rotor (2) and the rotating cavity (11) is 0.001-0.003mm.

8. A multi-way valve for an on-line water quality testing instrument as defined in claim 1, wherein: the fit clearance between the side wall of the rotor (2) and the inner wall of the rotating cavity (11) is 0.002-0.006mm.