Three-way valve

Abstract

The utility model relates to the technical field of valves, and provides a three-way valve which comprises a main body, the main body is provided with a first cavity, a second cavity and a third cavity which are sequentially communicated, the first cavity is provided with an outlet communicated with the outside, the second cavity is provided with an inlet communicated with the outside, and the third cavity is provided with a backflow port communicated with the outside. The sliding baffle is arranged in the second cavity in a sliding mode, the sliding baffle is close to the first cavity or the third cavity after sliding, and the sliding baffle is used for cutting off communication between the first cavity and the second cavity or between the second cavity and the third cavity; the fixing piece is arranged in the third cavity and is provided with a plurality of through holes; the two ends of the elastic piece are arranged on the fixing piece and the sliding baffle correspondingly. The elastic piece is used for providing force for the sliding baffle to get close to the first cavity. By means of the technical scheme, the problem that in the prior art, a three-way valve is low in opening and closing safety is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and in particular to a three-way valve. Background Art

[0002] Valves are pipe accessories used to open and close pipes, control flow direction, and adjust and control parameters of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. As an important fluid control device, valves are widely used in various industrial and civil fields, such as water treatment, petrochemicals, HVAC systems, etc.

[0003] The three-way valve in the prior art has a single structure and does not have a self-locking function for opening and closing different passages of the three-way valve. When used for high-pressure fluids such as mud transportation, huge losses may be caused once the valve fails. Utility Model Content

[0004] The utility model provides a three-way valve, which solves the problem of low opening and closing safety of the three-way valve in the related technology.

[0005] The technical solution of the utility model is as follows:

[0006] A three-way valve, comprising:

[0007] A main body, wherein the main body has a first cavity, a second cavity, and a third cavity which are connected in sequence, the first cavity has an outlet connected to the outside, the second cavity has an inlet connected to the outside, and the third cavity has a reflux port connected to the outside;

[0008] a sliding baffle, slidably disposed in the second cavity, and after sliding, the sliding baffle approaches the first cavity or the third cavity, and the sliding baffle is used to cut off the communication between the first cavity and the second cavity or between the second cavity and the third cavity;

[0009] A fixing member, disposed in the third cavity, the fixing member having a plurality of through holes;

[0010] An elastic member, with two ends respectively arranged on the fixing member and the sliding baffle, and the elastic member is used to provide a force for the sliding baffle to approach the first cavity.

[0011] Optionally, there is a gap between the sliding baffle and the inner wall of the second cavity, and further comprising:

[0012] There are two sealing rings, which are respectively arranged between the first cavity and the second cavity and between the second cavity and the third cavity. After the sliding baffle slides, it seals and abuts against one of the sealing rings. The sliding baffle and the sealing ring are used to cut off the connection between the first cavity and the second cavity or the second cavity and the third cavity.

[0013] Optionally, it also includes:

[0014] A telescopic member, arranged at one end of the first cavity away from the third cavity;

[0015] A piston is arranged at the telescopic end of the telescopic member, the piston is sealed and slidable with the inner wall of the first cavity, and after the telescopic member is extended and retracted, the piston approaches or moves away from the outlet;

[0016] An extension rod has one end arranged on the piston, the sliding baffle is arranged at the other end of the extension rod, and the outlet is located between the piston and the sliding baffle.

[0017] Optionally, the main body includes:

[0018] A first tube body, wherein the first tube body has the first cavity and the outlet, and the telescopic member is arranged at one end of the first tube body;

[0019] A second tube body, wherein the second tube body has the second cavity and the inlet, and a sealing ring is disposed between the first tube body and the second tube body;

[0020] The third tube body has the third cavity and the reflux port, a sealing ring is arranged between the third tube body and the second tube body, the third tube body has a first section and a second section that are interconnected, the axis of the first section is colinear with the axis of the second tube body, the second section is a curved tube, the reflux port is arranged at one end of the second section away from the first section, and the height of the reflux port is higher than that of the second tube body.

[0021] Optionally, the fixing member includes:

[0022] A first fixing ring is arranged in the first section, and an outer wall of the first fixing ring abuts against an inner wall of the first section;

[0023] A plurality of fixing bars, one end of which is arranged on the inner wall of the first fixing ring and the other end of which faces the center of the first fixing ring, and the fixing bars are spaced apart along the circumference of the first fixing ring;

[0024] A second fixing ring, the other ends of the plurality of fixing strips are all arranged on the inner wall of the second fixing ring, the axis of the second fixing ring is collinear with the axis of the first fixing ring, one end of the elastic member is arranged on the second fixing ring, and the through hole is provided between the first fixing ring, the second fixing ring and the plurality of fixing strips;

[0025] A sliding rod has one end arranged on the side of the sliding baffle away from the piston, and the other end passes through the second fixing ring. The sliding rod is slidably arranged relative to the second fixing ring, and the elastic member is sleeved on the sliding rod.

[0026] Optionally, the first tube body, the second tube body, and the third tube body are connected by flanges.

[0027] Optionally, the telescopic member is a cylinder.

[0028] The working principle and beneficial effects of the utility model are:

[0029] In the utility model, the main body includes three sequentially connected first, second and third cavities, which can meet the requirements of fluid control in different flow directions. The first cavity has an outlet for fluid discharge; the second cavity has an inlet for receiving external fluid; and the third cavity has a reflux port, which provides another flow path or circulation path for the fluid, increasing the flexibility of the system.

[0030] The sliding baffle can slide in the second cavity, and control the flow of fluid between the first cavity and the second cavity, or between the second cavity and the third cavity by changing its position. This design enables the three-way valve to respond quickly to control instructions and switch or close the fluid channel, which is suitable for scenarios that require flexible adjustment of the fluid flow direction.

[0031] The fixing member is arranged in the third cavity and has a plurality of through holes thereon, through holes allowing fluid to pass through. The fixing member can provide fixed support for the elastic member without affecting the passage of the fluid.

[0032] The elastic member connects the fixed member and the sliding baffle, and provides a restoring force for the sliding baffle that is biased toward the first cavity. The sliding baffle can slide in the second cavity through the driving device. When the sliding baffle slides to the connection position between the first cavity and the second cavity, the sliding baffle cuts off the first cavity and the second cavity. The fluid entering from the inlet cannot flow out from the outlet, but can flow out through the reflux port. When the sliding baffle is used for a long time, or the power source suddenly disappears, the sliding baffle can slide to the connection position between the first cavity and the second cavity under the action of the elastic member no matter where it is, and cut off the connection between the first cavity and the second cavity. The setting of the elastic member improves the safety of the overall device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0034] Figure 1 It is a schematic diagram of the structure of the utility model;

[0035] Figure 2 This is a left side view of the utility model;

[0036] Figure 3 For this utility model Figure 2 Middle AA section view;

[0037] Figure 4 This is a schematic diagram of the structure of the fixing member of the utility model.

[0038] In the figure: 100, main body, 111, first cavity, 121, second cavity, 131, third cavity, 1111, outlet, 1211, inlet, 1311, reflux port, 200, sliding baffle, 300, fixing part, 310, through hole, 400, elastic part, 500, sealing ring, 600, telescopic part, 700, piston, 800, extension rod, 110, first tube body, 120, second tube body, 130, third tube body, 1320, first section, 1310, second section, 320, first fixing ring, 330, fixing strip, 340, second fixing ring, 900, sliding rod. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0040] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0041] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0042] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0043] Reference Figure 1~Figure 4 The utility model proposes a three-way valve, including a main body 100 having a first cavity 111, a second cavity 121, and a third cavity 131 which are connected in sequence, the first cavity 111 having an outlet 1111 connected to the outside, the second cavity 121 having an inlet 1211 connected to the outside, and the third cavity 131 having a reflux port 1311 connected to the outside; a sliding baffle 200 is slidably arranged in the second cavity 121, after the sliding baffle 200 slides, it approaches the first cavity 111 or the third cavity 131, and the sliding baffle 200 is used to cut off the communication between the first cavity 111 and the second cavity 121 or the second cavity 121 and the third cavity 131; a fixing member 300 is arranged in the third cavity 131, and the fixing member 300 has a plurality of through holes 310; two ends of the elastic member 400 are respectively arranged on the fixing member 300 and the sliding baffle 200, and the elastic member 400 is used to provide a force for the sliding baffle 200 to approach the first cavity 111.

[0044] In this embodiment, the main body 100 includes three sequentially connected first cavities 111, second cavities 121, and third cavities 131, which can meet the requirements of fluid control in different flow directions. The first cavity 111 has an outlet 1111 for fluid discharge; the second cavity 121 has an inlet 1211 for receiving external fluid; and the third cavity 131 is provided with a reflux port 1311, which provides another flow path or circulation path for the fluid, increasing the flexibility of the system.

[0045] The sliding baffle 200 can slide in the second cavity 121, and control the flow of the fluid between the first cavity 111 and the second cavity 121, or between the second cavity 121 and the third cavity 131 by changing its position. This design enables the three-way valve to quickly respond to control instructions and realize the switching or closing of the fluid channel, which is suitable for scenarios where the fluid flow direction needs to be flexibly adjusted.

[0046] The fixing member 300 is disposed in the third cavity 131 and has a plurality of through holes 310 thereon. The through holes 310 allow fluid to pass through. The fixing member 300 can provide fixed support for the elastic member 400 without affecting the passage of the fluid.

[0047] The elastic member 400 connects the fixing member 300 and the sliding baffle 200, and provides a restoring force for the sliding baffle 200 to be biased toward the first cavity 111. The sliding baffle 200 can slide in the second cavity 121 through the driving device. When the sliding baffle 200 slides to the connecting position of the first cavity 111 and the second cavity 121, the sliding baffle 200 cuts off the first cavity 111 and the second cavity 121. The fluid entering from the inlet 1211 cannot flow out from the outlet 1111, but can flow out through the reflux port 1311. When the sliding baffle 200 is used for a long time, or the power source suddenly disappears, the sliding baffle 200 can slide to the connecting position of the first cavity 111 and the second cavity 121 under the action of the elastic member 400 regardless of its position, and cuts off the communication between the first cavity 111 and the second cavity 121. The setting of the elastic member 400 improves the safety of the overall device.

[0048] Furthermore, there is a gap between the sliding baffle 200 and the inner wall of the second cavity 121, and also includes two sealing rings 500, which are respectively arranged between the first cavity 111 and the second cavity 121, and between the second cavity 121 and the third cavity 131. After sliding, the sliding baffle 200 is sealed and abutted against a sealing ring 500. The sliding baffle 200 and the sealing ring 500 are used to cut off the connection between the first cavity 111 and the second cavity 121 or the second cavity 121 and the third cavity 131.

[0049] In this embodiment, the gap reserved between the sliding baffle 200 and the inner wall of the second cavity 121 is to provide space for the smooth movement of the sliding baffle 200 to ensure that it will not get stuck due to over-tightening when switching positions.

[0050] The sealing ring 500 disposed between the first cavity 111 and the second cavity 121, and between the second cavity 121 and the third cavity 131, is a key component to ensure fluid isolation. The sealing ring 500 is usually made of a material that is resistant to high temperatures, corrosion, and has good elasticity, such as rubber or Teflon, and can fit closely with the sliding baffle 200 when it moves into place, forming a reliable sealing interface and effectively preventing the fluid from flowing in an undesirable path.

[0051] Furthermore, it also includes a telescopic member 600, which is arranged at one end of the first cavity 111 away from the third cavity 131; the piston 700 is arranged at the telescopic end of the telescopic member 600, and the piston 700 slides in a sealed manner with the inner wall of the first cavity 111. After the telescopic member 600 is extended or retracted, the piston 700 approaches or moves away from the outlet 1111; one end of the extension rod 800 is arranged on the piston 700, and the sliding baffle 200 is arranged at the other end of the extension rod 800, and the outlet 1111 is located between the piston 700 and the sliding baffle 200.

[0052] In this embodiment, the telescopic member 600 is designed as a direct driving device for the sliding baffle 200, and provides the necessary power for the sliding of the sliding baffle 200 through its telescopic action.

[0053] The telescopic movement of the telescopic member 600 first drives the piston 700 to slide along the inner wall seal in the first cavity 111. The movement of the piston 700 is transmitted through the extension rod 800. The extension rod 800 has a small cross-sectional area, which can not only reduce the impact on the fluid flow, but also ensure that there is an appropriate distance between the sliding baffle 200 and the piston 700. Such a layout not only optimizes the smoothness of the fluid channel, but also maintains the compactness of the system.

[0054] The outlet 1111 is arranged between the sliding baffle 200 and the piston 700, ensuring that no matter what position the sliding baffle 200 is in, the outlet 1111 is always the only way for the fluid to flow out, avoiding the fluid from leaking around the sliding baffle 200 or the piston 700, thereby ensuring the accuracy and safety of the fluid flow control. At the same time, the intervention of the extension rod 800 enables this layout to be realized, which does not affect the normal function of the outlet 1111 and also improves the stability of the overall structure and the flexibility of operation.

[0055] Further, the main body 100 includes a first tube body 110 having a first cavity 111 and an outlet 1111, and a telescopic member 600 is arranged at one end of the first tube body 110; the second tube body 120 has a second cavity 121 and an inlet 1211, and a sealing ring 500 is arranged between the first tube body 110 and the second tube body 120; the third tube body 130 has a third cavity 131 and a reflux port 1311, and a sealing ring 500 is arranged between the third tube body 130 and the second tube body 120, and the third tube body 130 has a first section 1320 and a second section 1310 that are interconnected, the axis of the first section 1320 is colinear with the axis of the second tube body 120, the second section 1310 is a curved tube, and the reflux port 1311 is arranged at one end of the second section 1310 away from the first section 1320, and the height of the reflux port 1311 is higher than the second tube body 120.

[0056] In this embodiment, the main body 100 is composed of three main parts: a first tube body 110 , a second tube body 120 and a third tube body 130 . The segmented design is convenient for manufacturing, installation and maintenance.

[0057] The first tube body 110 includes a first cavity 111 and is directly connected to an outlet 1111, which is the main channel for fluid discharge. The telescopic member 600 is disposed at one end of the first tube body 110 as a power source for driving the sliding baffle 200, so that the driving mechanism is separated from the fluid outlet 1111, which is convenient for maintenance and operation.

[0058] The second tube body 120 includes a second cavity 121, which is connected to an external inlet 1211 and is the main inlet for fluid to enter the three-way valve. Sealing rings 500 are arranged between the first tube body 110 and the second tube body 120, and between the second tube body 120 and the third tube body 130, which not only ensures the seal between the two parts and prevents fluid leakage, but also facilitates the installation of the sealing ring 500.

[0059] The third tube body 130 is divided into two sections, the first section 1320 is colinear with the axis of the second tube body 120 to maintain the linearity of the fluid flow, and the second section 1310 is designed as a curved tube, which not only meets the needs of the installation space, but also may help to adjust the fluid flow state or achieve a specific fluid guide. The return port 1311 is set at the end of the curved tube, and its height is higher than the second tube body 120. The gravity can be used to make the fluid press the sliding baffle 200 to the position of cutting off the connection between the first cavity 111 and the second cavity 121, further providing a guarantee for the safety performance of the device.

[0060] Further, the fixing member 300 includes a first fixing ring 320, which is arranged in the first section 1320, and the outer wall of the first fixing ring 320 abuts against the inner wall of the first section 1320; a fixing bar 330, which has one end arranged on the inner wall of the first fixing ring 320 and the other end facing the center of the first fixing ring 320, and the fixing bars 330 are distributed along the circumference of the first fixing ring 320 at intervals; a second fixing ring 340, and the other ends of the fixing bars 330 are all arranged on the inner wall of the second fixing ring 340. The axis of the second fixing ring 340 is colinear with the axis of the first fixing ring 320, one end of the elastic member 400 is arranged on the second fixing ring 340, and a through hole 310 is provided between the first fixing ring 320, the second fixing ring 340, and the plurality of fixing strips 330; one end of the sliding rod 900 is arranged on the side of the sliding baffle 200 away from the piston 700, and the other end passes through the second fixing ring 340, and the sliding rod 900 is slidably arranged relative to the second fixing ring 340, and the elastic member 400 is sleeved on the sliding rod 900.

[0061] In this embodiment, the first fixing ring 320 is installed in the first section 1320 of the third tube body 130, and its outer wall is tightly abutted against the inner wall of the first section 1320. Such a design not only ensures the stable installation of the fixing member 300, but also provides a solid foundation for subsequent components.

[0062] A plurality of fixing strips 330 are distributed at intervals along the circumference of the first fixing ring 320, with one end fixed on the inner wall of the first fixing ring 320 and the other end pointing to the center of the circle, and the other end of the fixing strip 330 is fixed on the inner wall of the second fixing ring 340. The radial fixing strips 330 contribute to the stability of the second fixing ring 340. The axes of the first fixing ring 320 and the second fixing ring 340 are colinear, which further improves the stability of the system, not only providing a stable fixed support for the elastic member 400, but also ensuring the precise guidance and uniform force distribution of the sliding rod 900 during movement.

[0063] The elastic member 400 is sleeved on the sliding rod 900, and the sliding rod 900 can provide a certain support for the elastic member 400 to prevent the elastic member 400 from bending under the action of gravity, thereby affecting the use effect. The sliding rod 900 is slidably arranged relative to the second fixing ring 340, and the sliding rod 900 can adapt to the change of the distance between the sliding baffle 200 and the second fixing ring 340.

[0064] Furthermore, the first tube body 110 , the second tube body 120 , and the third tube body 130 are flange-connected.

[0065] In this embodiment, flange connection is a common pipe connection method, which is to install an interface with a flange at the end of the pipe body, and then use bolts and nuts to tightly connect the two flanges. This method does not require welding, greatly simplifies the on-site installation process, and is also convenient for future maintenance and disassembly, reduces the requirements for professional skills, and improves work efficiency.

[0066] Furthermore, the telescopic member 600 is a cylinder.

[0067] In this embodiment, the pneumatic system has a faster response speed and can quickly complete the telescopic action. Compared with hydraulic or electrical drive, the pneumatic system has a relatively simple structure and a lower maintenance cost.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A three-way valve, characterized in that: include: A main body (100), the main body (100) having a first cavity (111), a second cavity (121), and a third cavity (131) which are connected in sequence, the first cavity (111) having an outlet (1111) connected to the outside, the second cavity (121) having an inlet (1211) connected to the outside, and the third cavity (131) having a reflux port (1311) connected to the outside; a sliding baffle (200) slidably disposed in the second cavity (121); after sliding, the sliding baffle (200) is close to the first cavity (111) or the third cavity (131); the sliding baffle (200) is used to cut off the communication between the first cavity (111) and the second cavity (121) or between the second cavity (121) and the third cavity (131); A fixing member (300) is disposed in the third cavity (131), and the fixing member (300) has a plurality of through holes (310); An elastic member (400) has two ends respectively arranged on the fixing member (300) and the sliding baffle (200), and the elastic member (400) is used to provide a force for the sliding baffle (200) to approach the first cavity (111).

2. A three-way valve according to claim 1, characterized in that: There is a gap between the sliding baffle (200) and the inner wall of the second cavity (121), and further comprising: There are two sealing rings (500), which are respectively arranged between the first cavity (111) and the second cavity (121), and between the second cavity (121) and the third cavity (131); the sliding baffle (200) slides and then seals against one of the sealing rings (500); the sliding baffle (200) and the sealing ring (500) are used to cut off the communication between the first cavity (111) and the second cavity (121) or between the second cavity (121) and the third cavity (131).

3. A three-way valve according to claim 2, characterized in that: Also includes: A telescopic member (600) is arranged at an end of the first cavity (111) away from the third cavity (131); A piston (700) is arranged at the telescopic end of the telescopic member (600), the piston (700) slides in a sealed manner with the inner wall of the first cavity (111), and after the telescopic member (600) is telescoped, the piston (700) moves closer to or farther from the outlet (1111); An extension rod (800) has one end disposed on the piston (700), the sliding baffle (200) is disposed at the other end of the extension rod (800), and the outlet (1111) is located between the piston (700) and the sliding baffle (200).

4. A three-way valve according to claim 3, characterized in that: The main body (100) comprises: A first tube body (110), the first tube body (110) having the first cavity (111) and the outlet (1111), the telescopic member (600) being arranged at one end of the first tube body (110); a second tube body (120), the second tube body (120) having the second cavity (121) and the inlet (1211), and a sealing ring (500) disposed between the first tube body (110) and the second tube body (120); A third tube body (130), the third tube body (130) having the third cavity (131) and the reflux port (1311), a sealing ring (500) being arranged between the third tube body (130) and the second tube body (120), the third tube body (130) having a first section (1320) and a second section (1310) being connected to each other, the axis of the first section (1320) being colinear with the axis of the second tube body (120), the second section (1310) being a curved tube, the reflux port (1311) being arranged at an end of the second section (1310) away from the first section (1320), the height of the reflux port (1311) being higher than the second tube body (120).

5. A three-way valve according to claim 4, characterized in that: The fixing member (300) comprises: A first fixing ring (320) is arranged in the first section (1320), and an outer wall of the first fixing ring (320) abuts against an inner wall of the first section (1320); A plurality of fixing bars (330), one end of which is arranged on the inner wall of the first fixing ring (320) and the other end of which is directed toward the center of the first fixing ring (320), and the plurality of fixing bars (330) are distributed at intervals along the circumference of the first fixing ring (320); a second fixing ring (340), the other ends of the plurality of fixing strips (330) being arranged on the inner wall of the second fixing ring (340), the axis of the second fixing ring (340) being colinear with the axis of the first fixing ring (320), one end of the elastic member (400) being arranged on the second fixing ring (340), and the through hole (310) being provided between the first fixing ring (320), the second fixing ring (340) and the plurality of fixing strips (330); A sliding rod (900) has one end disposed on a side of the sliding baffle (200) away from the piston (700), and the other end passing through the second fixing ring (340). The sliding rod (900) is slidably disposed relative to the second fixing ring (340), and the elastic member (400) is sleeved on the sliding rod (900).

6. A three-way valve according to claim 4, characterized in that: The first tube body (110), the second tube body (120), and the third tube body (130) are flange-connected.

7. A three-way valve according to claim 3, characterized in that: The telescopic member (600) is a cylinder.

Images