Servo valve

Abstract

The utility model belongs to the field of valves, and provides a servo valve which comprises a valve body, a valve seat, a first water inlet and outlet and a second water inlet and outlet are arranged on the valve body, a servo motor is arranged on the valve seat, a communication port is arranged between the first water inlet and outlet and the second water inlet and outlet, and the first water inlet and outlet and the second water inlet and outlet are communicated through the communication port. A valve rod is arranged at the output end of the servo motor, the servo motor can drive the valve rod to move between a first position and a second position, a flow blocking part is arranged on the valve rod, and when the valve rod is located at the first position, the flow blocking part is closest to the communicating opening, and the opening degree of the communicating opening is minimum; and when the valve rod is in the second position, the flow blocking part is farthest away from the communicating opening, and the opening degree of the communicating opening is maximum. According to the servo valve, the movement of the valve rod is controlled through the servo motor, and therefore the flow of fluid flowing through the communicating opening in the valve body can be adjusted more flexibly.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve field especially relates to a servo valve. BACKGROUND

[0002] In the family pipeline installed with the wall -hanging stove, because the different heat power of wall -hanging stove, so the heat exchange efficiency is different, usually to guarantee effective heat exchange efficiency, in the water inlet of wall -hanging stove water inlet valve will select to increase a flow -limiting ring, limit the entering amount of cold water, reach the effect that in the case of limited heat power, the water that flows in can also be heated to the temperature of proper.

[0003] For example, the maximum heat value of 20KW heat power wall -hanging stove can only let 8L / min water flow cold water from 5 DEG C to 40 DEG C, when summer ambient temperature is high, cold water temperature will reach 25 DEG C, so the flow -limiting ring is still limited in 8L / min water amount, and the temperature of water will rise quickly, or the temperature exceeds 40 DEG C and scalds to people. At this moment, 8L / min needs to be improved to 10L / min or higher, but the flow -limiting size of flow -limiting ring is fixed, and the problem cannot be effectively solved.

[0004] Therefore, at present, there is an urgent need for a device capable of flexibly adjusting the water flow of the water inlet of the wall -hanging stove water inlet valve. CONTENT OF THE UTILITY MODEL

[0005] The main purpose of the utility model is to provide a servo valve installed on the wall -hanging stove water inlet valve for flexibly adjusting the water inlet flow, to at least solve the above technical problems existing in the prior art.

[0006] In order to achieve the above purpose, the utility model provides a servo valve, which comprises a valve body, a valve seat, a first inlet and outlet water port and a second inlet and outlet water port are arranged on the valve body, a servo motor is arranged on the valve seat, a communication port is arranged between the first inlet and outlet water port and the second inlet and outlet water port, an output end of the servo motor is provided with a valve rod, the servo motor can drive the valve rod to move between a first position and a second position, a flow resistance part is arranged on the valve rod, when the valve rod is in the first position, the flow resistance part is closest to the communication port, and the opening degree of the communication port is minimum, when the valve rod is in the second position, the flow resistance part is farthest from the communication port, and the opening degree of the communication port is maximum.

[0007] In an implementable manner, the first inlet and outlet water port and the second inlet and outlet water port are arranged on the two sides of the valve body respectively.

[0008] In an implementable manner, the axis of the first inlet and outlet water port and the second inlet and outlet water port is collinear or parallel.

[0009] In an embodiment, a sealing sleeve is arranged in the valve seat, and the sealing sleeve is sleeved on the outer side of the valve rod.

[0010] In an embodiment, the sealing sleeve comprises a transmission matching part and an inner sealing part, the transmission matching part is threadedly matched with the valve rod, and the inner sealing part is sealed with the valve rod by a first sealing element.

[0011] In an embodiment, the sealing sleeve comprises an outer sealing part, and the outer sealing part is sealed with the valve seat by a second sealing element.

[0012] In an embodiment, the outer contour of the flow blocking part can completely cover the communication port.

[0013] In an embodiment, when the valve rod is in the second position, the flow blocking part abuts against the sealing sleeve.

[0014] In an embodiment, the communication port is arranged as an arc-shaped end face towards one end of the flow blocking part.

[0015] In an embodiment, one face of the flow blocking part towards the communication port is arranged as a plane.

[0016] In an embodiment, a guide groove is arranged at one end of the communication port away from the servo motor, and an end portion of the valve rod extends into the communication port and can be slidingly matched with the guide groove, and the valve rod is guided and limited by the guide groove during movement of the valve rod.

[0017] In an embodiment, the servo motor is mounted on the valve seat by a fastener.

[0018] The servo valve can more flexibly adjust the flow rate of fluid flowing through the communication port in the valve body by controlling the movement of the valve rod by the servo motor.

[0019] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and other objects, features and advantages of the example embodiments of the present application will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0021] In the drawings, identical or corresponding reference signs refer to identical or corresponding parts.

[0022] Figure 1 is a structure diagram of a servo valve of an embodiment of the present application;

[0023] Figure 2 is a sectional view of the servo valve of the embodiment of the present application;

[0024] Figure 3 is a sectional view of the valve body in the embodiment of the present application.

[0025] Among the above drawings, the following reference signs are included:

[0026] 1, valve body; 11, valve seat; 12, first water inlet and outlet; 13, second water inlet and outlet; 14, servo motor; 141, valve rod; 1411, resistance flow part; 15, communication port; 151, guide groove; 16, sealing valve sleeve; 161, transmission matching part; 162, inner sealing part; 163, outer sealing part; 171, first sealing element; 172, second sealing element. DETAILED DESCRIPTION

[0027] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] It should be understood that, in the description of the present application, when a component is referred to as "provided on" or "disposed on" or "mounted on" another component, it can be directly provided on the other component or there can be a middle component. When a component is referred to as "fixed to" another component, it can be directly fixed to the other component or there can be a middle component.

[0029] When a component is referred to as "connected to" another component, it can be directly connected to the other component or there can be a middle component. Conversely, when a component is referred to as "directly connected to" another component, there is no middle component.

[0030] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. The terms related to "first direction", "second direction" and the like directional terms refer to a straight line direction, unless otherwise specifically limited.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. In this description, "a" or "an" can mean one or more than one. As used in this description, the term "or / and" includes any and all combinations of one or more of the associated listed items.

[0032] Referring to Figure 1 and Figure 2 The utility model provides a kind of servo valve, the servo valve includes valve body 1, is provided with valve seat 11 on valve body 1, is provided with servo motor 14 by fastener fixedly on valve seat 11.

[0033] In the embodiment of the utility model, first inlet and outlet 12 and second inlet and outlet 13 are provided on valve body 1, communication port 15 is provided between first inlet and outlet 12 and second inlet and outlet 13, the output end of servo motor 14 is provided with valve stem 141, valve stem 141 is provided with resistance flow part 1411, servo motor 14 can drive valve stem 141 move between first position and second position, when valve stem 141 is in first position, resistance flow part 1411 is closest to communication port 15, the opening of communication port 15 is minimum, so that the water flow through communication port 15 is minimum;When valve stem 141 is in second position, resistance flow part 1411 is farthest from communication port 15, the opening of communication port 15 is maximum, so that the water flow through communication port 15 is maximum.In this embodiment, the water flow through communication port 15 can be adjusted between minimum value and maximum value.

[0034] In the embodiment of the utility model, first inlet and outlet 12 and second inlet and outlet 13 are respectively arranged at the two sides of valve body 1, and communication port 15 is arranged between first inlet and outlet 12 and second inlet and outlet 13.In the embodiment of the utility model, first inlet and outlet 12 and second inlet and outlet 13 are not limited to be straight pipe type channels, but are limited to be independent channels with each other, to facilitate independent connection of pipeline.

[0035] In the embodiment of the utility model, one of first inlet and outlet 12 and second inlet and outlet 13 is inlet, and the other is outlet.The following embodiment takes first inlet and outlet 12 as inlet and second inlet and outlet 13 as outlet to illustrate.

[0036] In the embodiment of the utility model, the axis of first inlet and outlet 12 and second inlet and outlet 13 is arranged in line (not shown in the figure), so that first inlet and outlet 12 and second inlet and outlet 13 are symmetrical about the axis of servo valve, to increase the aesthetic property.

[0037] In the embodiment of the utility model, the axis of first water inlet and outlet 12 and second water inlet and outlet 13 is parallel, that is, the axis of first water inlet and outlet 12 and second water inlet and outlet 13 is offset, the axis direction of communication port 15 is perpendicular to the direction of water inlet or water outlet, the water inlet is directly communicated with the end of communication port 15 away from servo motor 14, and the water outlet is arranged at the end of communication port 15 close to servo motor 14, so that the water inflow and outflow are both better.

[0038] In the embodiment of the utility model, the guiding groove 151 is arranged at the end of communication port 15 away from servo motor 14, and the end of valve rod 141 extends into communication port 15 and can be slidably matched with guiding groove 151, so that valve rod 141 can be guided and limited by guiding groove 151 during the movement driven by servo motor 14, thereby ensuring the stability of valve rod 141 during movement.

[0039] In the embodiment of the utility model, in order to enhance the sealing property of valve seat 11 and servo motor 14, sealing valve sleeve 16 is arranged in valve seat 11, and sealing valve sleeve 16 is arranged on the outer side of valve rod 141.

[0040] In the embodiment of the utility model, sealing valve sleeve 16 comprises transmission matching part 161 and inner sealing part 162, transmission matching part 161 is threadedly matched with valve rod 141, so as to increase the transmission support of valve rod 141, and inner sealing part 162 is sealed with valve rod 141 through first sealing element 171, so as to enhance the sealing between the transmission part of valve rod 141 and the area through which fluid flows in valve body 1.

[0041] In the embodiment of the utility model, sealing valve sleeve 16 comprises outer sealing part 163, outer sealing part 163 is sealed with valve seat 11 through second sealing element 172, so as to enhance the sealing between servo motor 14 and the area through which fluid flows in valve body 1, and protect the power element.

[0042] In the embodiment of the utility model, first sealing element 171 and second sealing element 172 can be O-shaped sealing rings, and the number of layers of O-shaped sealing rings is not limited, for example, as shown in the figure, first sealing element 171 can be provided with two layers, and in the embodiment not shown, first sealing element 171 can also be provided with one layer or more layers. Figure 2

[0043] In the embodiment of the utility model, when valve rod 141 is at the first position, the outer contour of flow blocking part 1411 can completely cover communication port 15, so that the minimum water flow through communication port 15 can be close to 0, and the adjustment range of water flow is increased.

[0044] ​In the embodiment of the utility model, when the valve stem 141 is in the second position, the flow resistance part 1411 abuts against the sealing valve sleeve 16 to limit the maximum opening of the flow resistance part 1411 through the position of the sealing valve sleeve 16, thereby facilitating determination of the maximum value of the water flow.

[0045] With reference to Figure 2 And Figure 3 In the embodiment of the utility model, the one end of the communication port 15 towards the flow resistance part 1411 is set as an arc-shaped end surface a, on the one hand, the flow resistance part 1411 of the valve stem 141 and the communication port 15 can form linear sealing, the contact area is reduced, the passage area of the water flow is only controlled to change on the circle of the arc apex, the opening of the communication port 15 can be more accurately controlled, thereby the size of the flow can be more accurately controlled; on the other hand, the arc-shaped design can facilitate the water flow to flow out of the communication port 15 more smoothly.

[0046] In the embodiment of the utility model, the one end of the communication port 15 towards the flow resistance part 1411 is set as an arc-shaped end surface a, on the one hand, the flow resistance part 1411 of the valve stem 141 and the communication port 15 can form linear sealing, the contact area is reduced, the passage area of the water flow is only controlled to change on the circle of the arc apex, the opening of the communication port 15 can be more accurately controlled, thereby the size of the flow can be more accurately controlled; on the other hand, the arc-shaped design can facilitate the water flow to flow out of the communication port 15 more smoothly.

[0047] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that the combinations are within the scope of the present application.

[0048] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, however, it should not be understood as the limitation of the scope of the utility model patent. It should be pointed out that for the ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A servo valve characterized by, The utility model provides a valve, including valve body (1), be provided with valve seat (11) on valve body (1), first inlet and outlet (12) with second inlet and outlet (13), be provided with servo motor (14) on valve seat (11), be provided with intercommunication (15) between first inlet and outlet (12) with second inlet and outlet (13), the output of servo motor (14) is provided with valve stem (141), servo motor (14) can drive valve stem (141) moves between first position with second position, be provided with resistance flow part (1411) on valve stem (141), when valve stem (141) is in first position, resistance flow part (1411) is closest to intercommunication (15), and the opening of intercommunication (15) is minimum, when valve stem (141) is in second position, resistance flow part (1411) is farthest to intercommunication (15), and the opening of intercommunication (15) is maximum, be provided with guide recess (151) in the one end of intercommunication (15) away from servo motor (14), and the end of valve stem (141) is inserted into intercommunication (15) and can with guide recess (151) sliding fit, when the movement of valve stem (141), valve stem (141) is all oriented by guide recess (151) and is limited.

2. The servo valve of claim 1, wherein The first inlet and outlet (12) and the second inlet and outlet (13) are respectively arranged on two sides of the valve body (1).

3. The servo valve of claim 2, wherein, The first inlet and outlet (12) and the second inlet and outlet (13) are coaxial or parallel.

4. The servo valve of claim 1, wherein, A sealing valve sleeve (16) is arranged in the valve seat (11), and the sealing valve sleeve (16) is arranged outside the valve stem (141).

5. The servo valve of claim 4, wherein, The sealing valve sleeve (16) comprises a transmission matching part (161) and an inner sealing part (162), the transmission matching part (161) is in threaded connection with the valve stem (141), and the inner sealing part (162) is sealed with the valve stem (141) through a first sealing element (171).

6. The servo valve of claim 4, wherein, The sealing valve sleeve (16) comprises an outer sealing part (163), and the outer sealing part (163) is sealed with the valve seat (11) through a second sealing element (172).

7. The servo valve of claim 1, wherein An outer contour of the resistance flow part (1411) can completely cover the intercommunication (15).

8. The servo valve of claim 4, wherein, When the valve stem (141) is in the second position, the resistance flow part (1411) abuts against the sealing valve sleeve (16).

9. The servo valve of claim 1, wherein, An end of the intercommunication (15) towards the resistance flow part (1411) is arranged as an arc-shaped end face.

10. The servo valve of claim 1, wherein, A side of the resistance flow part (1411) towards the intercommunication (15) is arranged as a plane.

11. The servo valve according to any one of claims 1-10, characterized by The servo motor (14) is installed on the valve seat (11) through a fastener.

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