Anti-jamming switching valve

Abstract

The utility model discloses an anti-jamming switching valve which comprises a valve body, a valve element, a coupling, a connecting pin and a valve rod, the valve element is arranged in the valve body, the first end of the coupling is connected with the valve element through the connecting pin, the second end of the coupling is connected with the valve rod, the valve rod is used for adjusting the valve element to achieve the switching function, and the valve element is connected with the coupling through the connecting pin. Wherein the connecting pin is of a solid structure. The connecting pin of the solid structure is adopted, the material distribution of the connecting pin is more uniform and compact through the solid structure, and compared with a hollow connecting pin, the connecting pin can bear larger stress and torque. Therefore, during the switching operation of the oil cooler, the solid connecting pin can better resist the action of various external forces and is not easy to deform or break, so that the reliability of the connection between the coupling and the valve core is ensured. Therefore, the situation that the valve element cannot be lifted due to the fact that the connecting pin is bent or broken is avoided, and the problem of jamming of the switching valve is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of switching valve technology, specifically to an anti-jamming switching valve. Background Technology

[0002] In the turbine lubrication oil system, the oil tank is a core component, and the cooler switching valve, as an important part of the oil tank, is crucial for the stable operation of the entire system due to its rapid switching performance. The existing 600MW subcritical turbine cooler switching valve uses a hollow connecting pin at the connection between the coupling and the valve core. During normal operation, an oil film with surface tension exists between the valve body and the valve core. This surface tension causes the oil film to form a specific shape and generate adhesion on the component surface. During cooler switching operations, operators must overcome the weight of the valve core itself, the surface tension of the oil film, and the lifting torque transmitted by turning the large handwheel.

[0003] However, due to the insufficient strength of the hollow connecting pin at the connection between the coupling and the valve core, the hollow connecting pin is prone to bending or even breakage under the action of the aforementioned forces. This will cause the valve core to be unable to be lifted when the large handwheel is turned, resulting in jamming of the switching valve, which seriously affects the switching operation of the oil cooler, making it impossible to achieve fast and accurate switching of the oil cooler, and thus adversely affecting the normal operation of the turbine lubrication oil system. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of this utility model propose an anti-jamming switching valve.

[0006] The anti-jamming switching valve of this utility model embodiment includes a valve body, a valve core, a coupling, a connecting pin, and a valve stem. The valve core is disposed in the valve body. The first end of the coupling is connected to the valve core through the connecting pin, and the second end of the coupling is connected to the valve stem. The valve stem is used to adjust the valve core to realize the switching function. The connecting pin is a solid structure.

[0007] In some embodiments, a first mounting groove is provided on the top surface of the valve core, and a first connecting hole and a second connecting hole are coaxially arranged on the side wall of the first mounting groove. The first end of the coupling has a third connecting hole, and the first end of the coupling is adapted to extend into the first mounting groove. The connecting pin passes through the first connecting hole, the third connecting hole and the second connecting hole in sequence.

[0008] In some embodiments, the two ends of the connecting pin extend out of the first connecting hole and the second connecting hole, respectively.

[0009] In some embodiments, both ends of the connecting pin are riveted to the first connecting hole and the second connecting hole, respectively.

[0010] In some embodiments, the anti-jamming switching valve of this utility model includes a valve seat connected to the valve body, one end of the valve stem extending into the valve seat and rotatably connected to the valve seat, and the other end of the valve stem extending out of the valve seat. The valve stem is used to rotate the valve core to realize the switching function.

[0011] In some embodiments, the valve stem is provided with a rotating handwheel for rotating the valve stem.

[0012] In some embodiments, the valve seat is provided with a clamping wrench, which is rotatably connected to the valve seat for clamping or releasing the valve stem.

[0013] In some embodiments, the valve seat is detachably provided with a stop member for preventing the tightening wrench from rotating.

[0014] In some embodiments, a second mounting groove is provided on the bottom end face of the valve stem, and a fourth connecting hole and a fifth connecting hole are coaxially arranged on the side wall of the second mounting groove. The second end of the coupling has a sixth connecting hole, and the second end of the coupling is adapted to extend into the second mounting groove. The anti-jamming switching valve also includes a connecting bolt, which passes through the fourth connecting hole, the sixth connecting hole and the fifth connecting hole in sequence.

[0015] Hollow connecting pins in related technologies lack sufficient strength and are prone to bending or even breakage under various forces. This invention, however, uses solid connecting pins. The solid structure allows for a more uniform and dense material distribution, enabling it to withstand greater stress and torque compared to hollow connecting pins. Therefore, during oil cooler switching operations, solid connecting pins better resist various external forces, are less prone to deformation or breakage, and thus ensure the reliability of the connection between the coupling and the valve core.

[0016] The increased strength of the solid connecting pin ensures reliable force transmission to the valve core during large handwheel rotation, allowing for smooth lifting and actuation. This prevents the valve core from failing to lift due to bent or broken connecting pins, effectively solving the problem of valve jamming. The oil cooler can switch smoothly according to operator instructions, improving the stability and reliability of the switching operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the anti-jamming switching valve according to an embodiment of the present invention.

[0018] Figure 2 yesFigure 1 An enlarged schematic diagram of part A in the middle.

[0019] Figure 3 yes Figure 1 Enlarged schematic diagram of part B.

[0020] Figure 4 This is a partial schematic diagram of the anti-jamming switching valve according to an embodiment of the present invention.

[0021] 100. Anti-jamming switching valve; 1. Valve body; 2. Valve core; 201. First mounting groove; 202. First connecting hole; 203. Second connecting hole; 3. Coupling; 301. Third connecting hole; 4. Connecting pin; 5. Valve stem; 6. Valve seat; 7. Rotating handwheel; 8. Tightening wrench; 9. Stop; 10. Connecting bolt. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] like Figures 1 to 4 As shown, the anti-jamming switching valve 100 of this utility model embodiment includes a valve body 1, a valve core 2, a coupling 3, a connecting pin 4, and a valve stem 5. The valve core 2 is disposed inside the valve body 1. The first end of the coupling 3 is connected to the valve core 2 via the connecting pin 4, and the second end of the coupling 3 is connected to the valve stem 5. The valve stem 5 is used to adjust the valve core 2 to achieve the switching function, wherein the connecting pin 4 is a solid structure.

[0024] In use, the anti-jamming switching valve 100 of this utility model allows the operator to switch the oil cooler in the turbine lubrication oil system by rotating the valve stem 5. The valve stem 5 is connected to the second end of the coupling 3. When the valve stem 5 rotates, it drives the coupling 3 to rotate. The first end of the coupling 3 is connected to the valve core 2 through the connecting pin 4. Therefore, the rotation of the coupling 3 is transmitted to the valve core 2 through the connecting pin 4, causing the valve core 2 to perform corresponding actions within the valve body 1, ultimately realizing the switching function of the oil cooler.

[0025] During this process, the switching of the oil cooler requires overcoming the weight of the valve core 2 itself, the surface tension of the oil film, and the lifting torque transmitted by the large handwheel. The solid connecting pin 4, with its own structural characteristics, can stably and effectively transmit the force on the coupling 3 to the valve core 2, ensuring the smoothness of the entire force transmission process and avoiding interruption or obstruction of force transmission due to problems with the connecting pin 4.

[0026] Hollow connecting pins in related technologies lack strength and are prone to bending or even breakage under various forces. This invention, however, uses a solid connecting pin 4. The solid structure allows for a more uniform and dense material distribution in the connecting pin 4, enabling it to withstand greater stress and torque compared to a hollow connecting pin 4. Therefore, during oil cooler switching operations, the solid connecting pin 4 can better resist various external forces, making it less prone to deformation or breakage, thus ensuring the reliability of the connection between the coupling 3 and the valve core 2.

[0027] Due to the increased strength of the solid connecting pin 4, force can be reliably transmitted to the valve core 2 when the large handwheel is turned, allowing the valve core 2 to be smoothly lifted and operated. This avoids the situation where the valve core 2 cannot be lifted due to bending or breakage of the connecting pin 4, effectively solving the problem of jamming in the switching valve. The oil cooler can switch smoothly according to the operator's operating instructions, improving the stability and reliability of the switching operation.

[0028] The rapid and accurate switching of the oil cooler is crucial for the normal operation of the turbine lubrication oil system. This invention's anti-jamming switching valve 100 solves the problem of the connecting pin 4, enabling smooth switching of the oil cooler. This ensures that the lubrication oil system can adjust its cooling effect in a timely manner, maintaining the normal temperature and performance of the lubricating oil. This provides a strong guarantee for the stable operation of the turbine, reduces the risk of system failures and downtime caused by oil cooler switching problems, and improves the overall safety and economy of turbine operation.

[0029] In some embodiments, a first mounting groove 201 is provided on the top surface of the valve core 2, and a first connecting hole 202 and a second connecting hole 203 are coaxially arranged on the side wall of the first mounting groove 201. The first end of the coupling 3 has a third connecting hole 301. The first end of the coupling 3 is adapted to extend into the first mounting groove 201, and the connecting pin 4 passes through the first connecting hole 202, the third connecting hole 301 and the second connecting hole 203 in sequence.

[0030] By inserting the first end of the coupling 3 into the first mounting groove 201 and using the connecting pin 4 for through connection, the contact area and connection points between the coupling 3 and the valve core 2 are increased. Compared to a simple surface connection, this design can better resist external forces from all directions, making the connection between the coupling 3 and the valve core 2 more stable. During the switching process of the oil cooler, even under the influence of various forces such as the weight of the valve core 2 itself, the surface tension of the oil film, and the lifting torque, the connection structure is not easily loosened or separated, ensuring effective force transmission.

[0031] In some embodiments, the two ends of the connecting pin 4 extend out of the first connecting hole 202 and the second connecting hole 203, respectively.

[0032] During installation, the protruding portions at both ends of the connecting pin 4 provide clear reference and positioning markers for the installers. By observing the length and position of the protruding pin 4, installers can ensure that it accurately passes through each connecting hole, guaranteeing the correct connection between the coupling 3 and the valve core 2. Simultaneously, the protruding portions facilitate tooling for installation and securing, improving installation efficiency and accuracy.

[0033] The protruding ends of the connecting pin 4 provide a certain degree of anti-detachment function. During the long-term operation of the oil cooler switching valve, the connecting pin 4 may loosen or come out due to system vibration and external forces. The protruding parts of the connecting pin 4 can be further secured with auxiliary measures (such as installing snap rings, nuts, etc.) to prevent the connecting pin 4 from coming out of the connecting hole, thereby improving the reliability and stability of the entire connection structure and ensuring the normal operation of the turbine lubrication oil system.

[0034] In some embodiments, both ends of the connecting pin 4 are riveted to the first connecting hole 202 and the second connecting hole 203, respectively.

[0035] The mechanical interlocking force and friction generated by the riveting connection effectively resist various external forces and vibrations, preventing the connecting pin 4 from loosening during long-term use. During oil cooler switching, the system generates vibrations and impacts. Ordinary connection methods may cause the connecting pin 4 to loosen due to these factors, while the riveting connection ensures a tight connection, guaranteeing that the coupling 3 and valve core 2 maintain a reliable connection at all times, thus ensuring the normal operation of the switching valve. Riveting ensures a tight fit between the connecting pin 4 and the connecting hole, reducing clearance. The presence of clearance may cause the valve core 2 to wobble or shift during operation, affecting the accuracy and stability of switching. Eliminating clearance through riveting allows for more precise operation of the valve core 2, improving the accuracy and reliability of oil cooler switching.

[0036] In some embodiments, the anti-jamming switching valve 100 of this utility model includes a valve seat 6, which is connected to the valve body 1. One end of the valve stem 5 extends into the valve seat 6 and is rotatably connected to the valve seat 6, while the other end of the valve stem 5 extends out of the valve seat 6. The valve stem 5 is used to rotate the valve core 2 to achieve the switching function.

[0037] In the structure of this anti-jamming switching valve 100, the valve seat 6 plays an important supporting and positioning role. The valve seat 6 is connected to the valve body 1, forming a relatively stable structural foundation. One end of the valve stem 5 extends into the valve seat 6 and is rotatably connected to the valve seat 6, which provides a stable rotational support point for the valve stem 5.

[0038] When the operator needs to switch the oil cooler, an external force is applied to the other end of the valve stem 5 extending out of the valve seat 6, causing it to rotate around the connection point inside the valve seat 6. Since the valve stem 5 is connected to the coupling 3, and the coupling 3 is connected to the valve core 2 via the connecting pin 4, the rotation of the valve stem 5 will sequentially drive the coupling 3 and the valve core 2 to rotate. The rotation of the valve core 2 within the valve body 1 changes the fluid flow path, thereby realizing the switching function of the oil cooler.

[0039] In some embodiments, the valve stem 5 is provided with a rotating handwheel 7 for rotating the valve stem 5.

[0040] The handwheel 7 provides the operator with a convenient grip and point of force application. Compared to directly operating the small-diameter valve stem 5, the larger diameter and suitable shape of the handwheel allow the operator to more easily apply sufficient torque to turn the valve stem 5. This is especially important for situations requiring frequent oil cooler switching operations, significantly reducing the difficulty and labor intensity of operation.

[0041] The handwheel design allows operators to more precisely control the rotation angle of valve stem 5. By turning handwheel 7, operators can slowly and precisely adjust the rotation amplitude of valve stem 5 according to actual needs, thereby making the rotation of valve core 2 more precise, achieving accurate switching of the oil cooler, and avoiding switching errors caused by improper operation.

[0042] In some embodiments, the valve seat 6 is provided with a clamping wrench 8, which is rotatably connected to the valve seat 6 for clamping or releasing the valve stem 5.

[0043] During the operation of the anti-jamming switching valve 100, the clamping wrench 8 is rotatably connected to the valve seat 6, and its main function is to control the state of the valve stem 5. When it is necessary to switch the oil cooler, the operator rotates the clamping wrench 8 to the position of releasing the valve stem 5. At this time, the valve stem 5 is in a free state, and the operator can easily drive the valve stem 5 to rotate by turning the handwheel 7, thereby causing the valve core 2 to move and realize the switching of the oil cooler.

[0044] When the oil cooler switching is complete and the valve stem 5 needs to be fixed in position to ensure stable operation of the switching valve, the operator will turn the clamping wrench 8 to the position where the valve stem 5 is clamped. The clamping wrench 8 applies pressure to the valve stem 5 through a specific mechanical structure (such as lever principle or threaded clamping), so that sufficient friction is generated between the valve stem 5 and the valve seat 6, thereby fixing the valve stem 5 in the current position and preventing the valve stem 5 from rotating unexpectedly due to system vibration, fluid impact, or other factors, ensuring that the oil cooler maintains its predetermined operating state.

[0045] In some embodiments, a stop 9 is detachably provided on the valve seat 6, the stop 9 being used to stop the rotation of the clamping wrench 8.

[0046] After the operator clamps or releases the valve stem 5 by rotating the clamping wrench 8 to adjust the operating state of the oil cooler switching valve, it is necessary to ensure that the current position of the clamping wrench 8 is fixed to maintain the clamped or released state of the valve stem 5. At this time, the stop 9 is installed on the valve seat 6. The stop 9 will interact with the clamping wrench 8 to prevent the clamping wrench 8 from rotating further.

[0047] For example, when the clamping wrench 8 is in the position of clamping the valve stem 5, the presence of the stop 9 restricts the possibility of the clamping wrench 8 rotating in the opposite direction, thereby ensuring that the valve stem 5 is always reliably clamped and guaranteeing the stability of the switching valve's working state. Conversely, when the clamping wrench 8 is in the position of releasing the valve stem 5, the stop 9 can also prevent it from accidentally rotating to the clamping position, avoiding affecting the normal switching operation of the oil cooler.

[0048] In some embodiments, a second mounting groove is provided on the bottom end face of the valve stem 5. The groove sidewall of the second mounting groove has a fourth connecting hole and a fifth connecting hole arranged coaxially. The second end of the coupling 3 has a sixth connecting hole. The second end of the coupling 3 is adapted to extend into the second mounting groove. The anti-jamming switching valve 100 also includes a connecting bolt 10, which passes through the fourth connecting hole, the sixth connecting hole and the fifth connecting hole in sequence.

[0049] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An anti-jamming switching valve, characterized in that, include: Valve body; The valve includes a valve core, a coupling, a connecting pin, and a valve stem. The valve core is located within the valve body. The first end of the coupling is connected to the valve core via the connecting pin, and the second end of the coupling is connected to the valve stem. The valve stem is used to adjust the valve core to achieve a switching function. The connecting pin is a solid structure.

2. The anti-jamming switching valve according to claim 1, characterized in that, The valve core has a first mounting groove on its top surface. The first mounting groove has a first connecting hole and a second connecting hole that are coaxially arranged on its side wall. The first end of the coupling has a third connecting hole. The first end of the coupling is adapted to extend into the first mounting groove. The connecting pin passes through the first connecting hole, the third connecting hole and the second connecting hole in sequence.

3. The anti-jamming switching valve according to claim 2, characterized in that, The two ends of the connecting pin extend out of the first connecting hole and the second connecting hole, respectively.

4. The anti-jamming switching valve according to claim 3, characterized in that, Both ends of the connecting pin are riveted to the first connecting hole and the second connecting hole, respectively.

5. The anti-jamming switching valve according to claim 1, characterized in that, The valve includes a valve seat connected to the valve body, one end of the valve stem extending into the valve seat and rotatably connected to the valve seat, and the other end of the valve stem extending out of the valve seat. The valve stem is used to rotate the valve core to achieve a switching function.

6. The anti-jamming switching valve according to claim 5, characterized in that, The valve stem is equipped with a rotating handwheel for rotating the valve stem.

7. The anti-jamming switching valve according to claim 6, characterized in that, The valve seat is provided with a clamping wrench, which is rotatably connected to the valve seat and is used to clamp or release the valve stem.

8. The anti-jamming switching valve according to claim 7, characterized in that, The valve seat is detachably provided with a stop, which is used to stop the tightening wrench from rotating.

9. The anti-jamming switching valve according to claim 1, characterized in that, The bottom end face of the valve stem is provided with a second mounting groove. The side wall of the second mounting groove has a fourth connecting hole and a fifth connecting hole arranged coaxially. The second end of the coupling has a sixth connecting hole. The second end of the coupling is adapted to extend into the second mounting groove. The anti-jamming switching valve also includes a connecting bolt. The connecting bolt passes through the fourth connecting hole, the sixth connecting hole and the fifth connecting hole in sequence.

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