Reversing valve
By constructing a protruding connection section at the end of the valve spool element of the reversing valve and fixing it in the built-in cavity of the drive member using fasteners, the problem of the vane element vulnerability to the conventional reversing valve is solved, achieving higher reliability and reducing maintenance costs.
Patent Information
- Application Number
- CN202421902148.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-07
AI Technical Summary
When the traditional reversing valve is overloaded with tension, the connector of the valve core element is easily broken, resulting in the scrapping of the valve core element.
The valve core element can be moved synchronously with the drive by constructing a protruding connecting section at the end of the valve core element and fixing the connecting section in the first built-in cavity of the drive member using a fastener. When the fastener deforms, the maximum stress to be subjected is less than the stress in the connecting section, ensuring that the fastener disengages before the stress exceeds the limit and prevents damage to the valve core element.
It effectively prevents damage to the valve core element during tensile overload, reduces maintenance costs, and ensures the reliability and long life of the reversing valve.
Smart Images
Figure CN222880408U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a reversing valve, in particular to a reversing valve which can prevent a valve core element from being damaged when the pulling force is overloaded. Background Art
[0002] The conventional reversing valve is composed of a valve housing with a first built-in cavity, a valve core element disposed in the first built-in cavity and controlled to move, an actuator driving the valve core element, and other parts for positioning, guiding and sealing. The valve housing is configured with a main port communicating with the first built-in cavity, a first port communicating with the first built-in cavity, and a second port communicating with the first built-in cavity. The outer side of the valve core element is configured with a first area enclosed with the inner wall of the first built-in cavity to form a fluid flow and a second area enclosed with the inner wall of the first built-in cavity to form a fluid flow. The actuator includes a driving member connected to the end of the valve core element and a driving assembly that applies a thrust or a pull to the driving member to move it.
[0003] In a traditional reversing valve, a driving member is connected to the end of a valve core element through a thread. A thread groove is constructed at one end of the valve core element close to the actuator. A connecting end is constructed at one end of the driving member facing the valve core element, which is protruding and has threads on the circumference. The connecting end is threadedly connected to the thread groove so that the valve core element moves with the driving member. However, the connecting end is subjected to greater stress during the process of the driving member driving the valve core element to move. In particular, when the valve core element is pulled, the pulling force between the driving member and the valve core element needs to be transmitted through the connecting head. Moreover, the cross-sectional area of the connecting end is much smaller than the cross-sectional area of the end of the driving member. In this way, stress concentration will occur at the connection between the connecting end and the end of the driving member, causing the connecting head to be easily broken and the connecting head to be trapped in the thread groove and difficult to remove, thereby making the valve core element scrapped. Utility Model Content
[0004] The utility model aims to provide a reversing valve which can ensure its own structural integrity after the valve core element is passively separated from the driving element due to tension by changing the connection structure between the valve core element and the driving element.
[0005] The technical solution adopted by the utility model to solve the above problems is: a reversing valve, comprising:
[0006] The valve housing has an accommodating space inside.
[0007] A valve core element is arranged in the accommodating space, and a protruding connecting section is configured at the end of the valve core element.
[0008] A driving member, the driving member moves in a controlled manner, the driving member is fitted with one end of the valve core element, a first built-in cavity is configured inside the driving member, and a first through hole connected to the first built-in cavity is configured on the fitting side of the driving member and the valve core element for the connection section to pass through.
[0009] A fastener is arranged in the first built-in cavity, and the fastener is restricted on the connecting section extending into the first built-in cavity, and the fastener abuts against the inner wall of the first built-in cavity on the side facing the valve core element, so that the fastener is subjected to a resisting force away from the valve core element and a pulling force directed toward the valve core element applied to the fastener by the connecting section, so as to restrict the driven member to one end of the valve core element, so that the valve core element can move synchronously with the driving member, and in the process that the fastener is deformed under the action of the resisting force so that the connecting section is detached from the fastener, the maximum stress borne by the fastener during the deformation process is less than the stress when the connecting section is deformed.
[0010] Preferably, the outer circumference of the connecting section is configured with threads.
[0011] Preferably, the fastener is cylindrical in shape, one end of the fastener is arranged toward the valve core element and abuts against the inner wall of the first built-in cavity, and one end of the fastener facing the valve core element is constructed with an inwardly concave thread groove along the axial direction of the column to be threadedly connected with the connecting section.
[0012] Preferably, an inner wall of the first built-in cavity on one side close to the valve core element is configured as a plane to provide an abutment surface for the fastener.
[0013] Preferably, a gap is left between one end of the connecting section located inside the thread groove and an inner wall of the thread groove on a side facing away from the valve core element.
[0014] Preferably, one end of the fastener facing away from the valve core element is configured with a polygonal notch along its axial direction.
[0015] Preferably, there is a gap between the inner wall of the first through hole and the peripheral side of the connecting end.
[0016] Preferably, a reversing valve further includes:
[0017] A follower, wherein the follower is arranged at one end of the valve core element away from the driving element, a second built-in cavity is constructed inside the follower, the fastener is also arranged inside the second built-in cavity, and a second through hole is constructed at one end of the follower toward the valve core element so that the connecting section of the valve core element away from the driving element can extend into the second built-in cavity.
[0018] The fastener in the second built-in cavity is restricted on a connecting section of the valve core element at one end away from the driving element, and the fastener of the second built-in cavity abuts against an inner wall of the second built-in cavity at one end facing the valve core element.
[0019] Preferably, an inner wall of the second built-in cavity on a side close to the valve core element is configured as a plane to provide an abutment surface for the fastener in the second built-in cavity.
[0020] Beneficial effects of the embodiments of the present invention
[0021] The reversing valve constructs a protruding connecting section at the end of the valve core element and uses a fastener to fix the connecting section in the first built-in cavity of the driving element, so that the valve core element can move synchronously with the driving element, and in the process that the fastener is deformed under the action of the resisting force and causes the connecting section to be separated from the fastener, the maximum stress borne by the fastener during deformation is less than the stress of the connecting section during deformation, that is, the yield strength of the fastener is less than the yield strength of the connecting section, so that when the tensile stress borne by the connecting section of the valve core element is too large and the stress borne by the fastener exceeds its own yield strength, the fastener is deformed until the connecting section is separated from the fastener, thereby preventing the valve core element from being damaged and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a front cross-sectional view of the reversing valve in the embodiment of the utility model.
[0023] Figure 2 It is a structural schematic diagram of the valve core element in the embodiment of the utility model.
[0024] Figure 3 It is an isometric view of the reversing valve in the embodiment of the utility model.
[0025] Among them: 100, valve housing; 110, accommodating space; 120, first port; 130, second port; 140, main port; 200, valve core element; 210, connecting section; 220, first end; 230, second end; 240, middle section; 241, first area; 242, second area; 300, driving member; 310, first built-in cavity; 320, first through hole; 400, fastener; 410, threaded groove; 420, polygonal notch; 500, actuator; 600, follower; 610, second built-in cavity; 620, second through hole. DETAILED DESCRIPTION
[0026] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.
[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description created by the present application, unless otherwise specified, "multiple" means two or more.
[0028] In the description of this application, 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 application can be understood by specific circumstances.
[0029] like Figure 1As shown. A reversing valve in a preferred embodiment of the present application includes a valve housing 100, a valve core element 200, a driving member 300 and a fastener 400. The valve housing 100 is internally constructed with an accommodating space 110, the valve core element 200 is arranged in the accommodating space 110, and the end of the valve core element 200 is constructed with a protruding connecting section 210, the driving member 300 moves in a controlled manner, the driving member 300 is fitted with one end of the valve core element 200, the driving member 300 is internally constructed with a first built-in cavity 310, and the fitting side of the driving member 300 and the valve core element 200 is constructed with a first through hole 320 connected to the first built-in cavity 310, so that the end of the valve core element 200 close to the driving member 300 can pass through, the fastener 400 is located in the first built-in cavity 310, and the fastener 400 is limited to extend to the first built-in cavity. On the connecting section 210 in the cavity 310, the side of the fastener 400 facing the valve core element 200 abuts against the inner wall of the first built-in cavity 310, so that the fastener 400 is subjected to a resisting force away from the valve core element 200 and a pulling force directed toward the valve core element 200 applied to the fastener 400 by the connecting section 210, so as to limit the driven member 300 to one end of the valve core element 200, so that the valve core element 200 can move synchronously with the driving member 300, and in the process that the fastener 400 is deformed under the action of the resisting force and causes the connecting section 210 to detach from the fastener 400, the maximum stress borne by the fastener 400 during the deformation process is less than the stress when the connecting section 210 is deformed. The reversing valve constructs a protruding connecting section 210 at the end of the valve core element 200 and uses a fastener 400 to fix the connecting section 210 in the first built-in cavity 310 of the driving member 300, so that the valve core element 200 can move synchronously with the driving member 300. In addition, because the yield strength of the fastener 400 is less than the yield strength of the connecting section 210, when the tensile stress on the connecting section 210 is too large and the stress on the fastener 400 exceeds its own yield strength, the fastener 400 is deformed and damaged, causing the connecting section 210 to separate from the fastener 400, thereby preventing the valve core element 200 from being damaged, thereby reducing maintenance costs.
[0030] The maximum stress borne by the fastener 400 during the deformation process and the stress borne by the connecting section 210 during the deformation can be respectively understood as the yield strength of the fastener 400 and the yield strength of the valve core element 200 .
[0031] Specifically, the shape of the accommodating space 110 is cylindrical, and the first port 120, the second port 130 and the main port 140 are arranged on the circumferential side of the valve housing 100. The first port 120 and the second port 130 are located on the same side of the valve housing 100, and the main port 140 is located between the first port 120 and the second port 130. In addition, the main port 140 can be arranged on the same side as the first port 120, or can be arranged opposite to the first port 120 and the second port 130. The first port 120, the second port 130 and the main port 140 are all connected to the accommodating space 110. It should be noted that the main port 140 can be used as a liquid inlet port or a liquid outlet port. However, when the main port 140 is a liquid inlet port, the first port 120 and the second port 130 are both liquid outlet ports, and when the main port 140 is a liquid outlet port, the first port 120 and the second port 130 are both liquid inlet ports.
[0032] In some embodiments, the shape of the accommodation space 110 is cylindrical.
[0033] like Figure 2 As shown. Specifically, the overall shape of the valve core element 200 is approximately cylindrical, and the valve core element 200 has a central axis. The two ends of the valve core element 200 arranged along the central axis are respectively a first end 220 and a second end 230. The outer peripheral side of the middle section 240 of the valve core element 200 is configured with a first area 241 formed by enclosing the inner wall of the accommodating space 110 for fluid flow and a second area 242 formed by enclosing the inner wall of the accommodating space 110 for fluid flow. Both ends of the valve core element 200 are configured with a protruding connecting section 210, and in order to ensure the connection strength between the connecting section 210 and the end of the valve core element 200, the connecting section 210 and the valve core element 200 are integrally formed.
[0034] In some embodiments, the connecting section 210 is cylindrical in shape, and has threads on its circumference.
[0035] In some embodiments, the valve element 200 is made of stainless steel.
[0036] Specifically, the reversing valve further includes an actuator 500 for controlling the movement of the driving member 300. The actuator 500 includes an output end (not shown in the figure) for linear movement, and the output end is connected to an end of the driver 300 away from the valve core element 200 to drive the valve core element 200 to move in the accommodating space 110. During the movement of the valve core 200 in the accommodating space 110, when the valve core element 200 is located in the first position, the first end 220 is connected to the main port 140 through the first flow channel formed by the first area 241, the second area 242, the outer peripheral side of the valve core element 200 and the inner wall of the accommodating space 110. When the valve core element 200 is located in the second position, the second end 230 is connected to the main port 140 through the second flow channel formed by the first area 241, the second area 242, the outer peripheral side of the valve core element 200 and the inner wall of the accommodating space 110. The driving member 300 cooperates with the actuator 500 to switch the flow path of the fluid in the reversing valve. It can be understood that the first port 120, the second port 130, the main port 140 on the valve housing 100, the first area 241, the second area 242 on the valve core element 200 and the actuator 500 are all prior arts and need not be elaborated herein. The actuator 500 can be selected as a controlled rotating screw and a threaded sleeve adapted thereto, or a linear drive such as a telescopic cylinder can be selected.
[0037] Specifically, when one end of the fastener 400 abuts against the inner wall of the first built-in cavity 310, the valve core element 200 is connected to one end of the driving member 300 under the cooperation of the end of the valve core element 200 and the driving member 300 in close contact, and the valve core element 200 can only rotate relative to the driving member and cannot be separated from it. Further, in order to inhibit the rotation of the valve core element 200 relative to the driving member 300, pin holes can be constructed on the end faces of the valve core element 200 and the driving member 300 facing each other, and a pin can be installed in one pin hole, and the other end of the pin is plugged into another aligned pin hole, and the axial direction of the pin is parallel to the moving direction of the driving member 300, so as to achieve the effect of inhibiting the rotation of the valve core element 200.
[0038] In some embodiments, the fastener 400 is cylindrical in shape, both ends of the cylinder are flat, and one end is configured with an inwardly concave thread groove 410 along its own axis for threaded connection with the connecting section 210, and the inner wall of the first built-in cavity 310 close to the valve core element 200 is configured as a plane. When the end of the fastener 400 abuts against the plane, the reverse force applied to the fastener 400 is more uniform, thereby ensuring that the fastener 400 is normally applicable within a preset force range.
[0039] In other embodiments, the fastener 400 is made of carbon steel. Since the fastener 400 and the connecting section 210 are made of different materials, there is a difference in the thermal expansion coefficients of the two. Therefore, a gap is left between the end of the connecting section 210 located inside the thread groove 410 and the inner wall of the thread groove 410 away from the valve core element 200. The gap not only leaves a processing space for the tool to be withdrawn during processing, but also provides an expansion and contraction space for the expansion of the connecting section 210. Moreover, in order to facilitate disassembly and assembly, some fasteners 400 are configured with a polygonal notch 420 on the other side away from the thread groove 410 for the insertion of a polygonal wrench to facilitate disassembly and assembly of the fastener 400. It can be understood that in this embodiment, the end of the driving member 300 away from the valve core element 200 is configured as an opening to facilitate the assembly of the fixing member.
[0040] like Figure 3 In other embodiments, a follower 600 is installed at the other end of the valve core element 200 away from the driving member 300, and a second built-in cavity 610 is configured inside the follower 600. A second through hole 620 is configured at one end of the second built-in cavity 610 close to the valve core element 200. The connecting section 210 of the valve core element 200 away from the driving member 300 extends into the second built-in cavity 610 through the second through hole 620, and the end of the connecting section 210 located in the second built-in cavity 610 is also threadedly connected with a fastener 400, and the end of the fastener 400 facing the valve core element 200 abuts against the inner wall of the second built-in cavity 610 close to the valve core element 200, thereby installing the follower 600 at one end of the valve core element. In some embodiments, the inner wall of the second built-in cavity 610 close to the valve core element 200 is constructed as a plane, and the end of the fastener 400 in the second built-in cavity 610 facing the valve core element 200 abuts against the plane, so that the reverse force on the fastener 400 is more uniform, ensuring that the fastener 400 can be normally used within the preset force range.
[0041] It is understandable that the gap between the circumference of the follower 600 and the inner wall of the accommodating space 110 and the gap between the circumference of the driving member 300 and the inner wall of the accommodating space 110 can be sealed by arranging sealing rings and packings at corresponding positions, and the above sealing structures are all prior art and will not be described in detail here. In addition, the remaining structures and components on the reversing valve, such as the end cover, are also prior art and will not be described in detail.
[0042] The above contents described in this specification are merely examples of the present utility model. Those skilled in the art of the present utility model may make various modifications or additions to the specific embodiments described, or replace them in similar ways, as long as they do not deviate from the contents of the present utility model specification or exceed the scope defined in the claims, they shall all fall within the protection scope of the present utility model.
Claims
1. A reversing valve, characterized in that: include: A valve housing, wherein the interior of the valve housing is configured with an accommodating space; A valve core element is arranged in the accommodating space, and an end of the valve core element is configured with a protruding connecting section; A driving member, the driving member moves in a controlled manner, the driving member is fitted with one end of the valve core element, a first built-in cavity is configured inside the driving member, and a first through hole communicating with the first built-in cavity is configured on the fitting side of the driving member and the valve core element for the connection section to pass through; A fastener is arranged in the first built-in cavity, and the fastener is restricted on the connecting section extending into the first built-in cavity, and the fastener abuts against the inner wall of the first built-in cavity on the side facing the valve core element, so that the fastener is subjected to a resisting force away from the valve core element and a pulling force directed toward the valve core element applied to the fastener by the connecting section, so as to restrict the driven member to one end of the valve core element, so that the valve core element can move synchronously with the driving member, and in the process that the fastener is deformed under the action of the resisting force and causes the connecting section to detach from the fastener, the maximum stress borne by the fastener during the deformation process is less than the stress when the connecting section is deformed.
2. A reversing valve according to claim 1, characterized in that: The outer circumference of the connecting section is formed with a thread.
3. A reversing valve according to claim 2, characterized in that: The fastener is cylindrical in shape, one end of the fastener is arranged toward the valve core element and abuts against the inner wall of the first built-in cavity, and one end of the fastener facing the valve core element is configured with an inwardly concave thread groove along the axial direction of the column to be threadedly connected with the connecting section.
4. A reversing valve according to claim 1 or 3, characterized in that: An inner wall of the first built-in cavity on one side close to the valve core element is configured as a plane to provide an abutment surface for the fastener.
5. A reversing valve according to claim 3, characterized in that: A gap is left between one end of the connecting section located inside the thread groove and an inner wall of the thread groove on a side facing away from the valve core element.
6. A reversing valve according to claim 3, characterized in that: One end of the fastener facing away from the valve core element is configured with a polygonal notch along its axial direction.
7. A reversing valve according to claim 1 or 6, characterized in that: There is a gap between the inner wall of the first through hole and the peripheral side of the connecting end.
8. A reversing valve according to claim 7, characterized in that: Also includes: A follower, the follower is arranged at one end of the valve core element away from the driving element, a second built-in cavity is configured inside the follower, the second built-in cavity is also provided with the fastener, and a second through hole is configured at one end of the follower facing the valve core element, so that a connecting section of the valve core element away from the driving element can extend into the second built-in cavity; The fastener in the second built-in cavity is restricted on a connecting section of the valve core element at one end away from the driving element, and the fastener of the second built-in cavity abuts against an inner wall of the second built-in cavity at one end facing the valve core element.
9. A reversing valve according to claim 8, characterized in that: The inner wall of the second built-in cavity on one side close to the valve core element is configured as a plane to provide an abutment surface for the fastener in the second built-in cavity.