Valve element and valve rod connecting structure
By employing a weld-free design for the rod body, the first fixing ring, and the second fixing ring, the problem of easy damage to the valve core and valve stem connection structure under vibration and differential pressure is solved, achieving the effects of quick disassembly and assembly and reduced maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI YADI FLUID CONTROL TECH CO LTD
- Filing Date
- 2025-05-21
- Publication Date
- 2026-05-12
AI Technical Summary
The existing valve core and stem connection structure is easily damaged by factors such as vibration and differential pressure, resulting in frequent vibration, difficult disassembly and assembly, and high maintenance costs.
The design employs a weldless structure consisting of a rod body, a first fixing ring, and a second fixing ring. The valve core body is fixed by the rod head and shoulder, and the second fixing ring is threaded to the rod body. Holes and convex rings are provided on the fixing ring to disperse forces, enhance stability, and facilitate quick assembly and disassembly.
It enables quick assembly and disassembly of the valve core and valve stem connection structure, reduces maintenance costs, improves the stability and strength of the structure, and reduces wear on parts.
Smart Images
Figure CN224229281U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve equipment technology, and in particular to the valve core and valve stem connection structure. Background Technology
[0002] During operation, control valves are subject to vibrations from pipes, bases, and other components, as well as pressure differentials, transmission speed changes, and assembly errors during media transport, leading to frequent vibrations. This vibration causes repeated stress fatigue on components such as the valve core and stem, resulting in valve stem breakage, valve core pitting, and thread loosening.
[0003] To ensure the service life of the valve core and stem, they are connected via threaded connection and welding, or threaded connection and blind pin. However, these two structures are difficult to disassemble and assemble, making on-site maintenance of the valve core and stem assembly impossible. Once the valve core and stem assembly fails, the entire assembly must be replaced, resulting in high maintenance costs.
[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a valve core and valve stem connection structure to facilitate the maintenance of the valve core and valve stem assembly.
[0006] The technical solution of this utility model is as follows:
[0007] The valve core and valve stem connection structure includes:
[0008] The rod body has a radial shoulder; the end of the rod body extends radially to form a rod head;
[0009] The first retaining ring is fitted onto the rod body between the rod head and the shoulder;
[0010] The second fixing ring is sleeved on the rod body on the side of the first fixing ring away from the rod head;
[0011] When the valve core body is connected to the rod body, the valve core body is disposed on the rod body between the rod head and the first fixing ring, and the valve core body contacts the rod head; the opposite side of the first fixing ring contacts the valve core body and the shoulder respectively; the second fixing ring is threadedly connected to the rod body; the second fixing ring contacts the first fixing ring.
[0012] A further technical solution is that a first hole and a second hole are coaxially formed on the second fixing ring; the inner diameter of the first hole is larger than the inner diameter of the second hole, and the first hole is a blind hole; the rod passes through the second fixing ring along the first hole and the second hole; the first fixing ring is disposed in the first hole and contacts the bottom of the first hole; an internal thread is provided on the inner wall of the second hole.
[0013] A further technical solution is that a first convex ring is radially extended on the rod body; the circumferential surface of the first convex ring is provided with an external thread; the end face of the first convex ring near the rod head is the shoulder.
[0014] A further technical solution includes a third fixing ring, which is disposed on the rod body on the side of the second fixing ring away from the rod head; the third fixing ring is threadedly connected to the rod body; and the third fixing ring contacts the second fixing ring.
[0015] A further technical solution is that the third fixing ring is parallel to the outer surface of the rod and is a polygonal contact surface formed by the combination of multiple planes.
[0016] A further technical solution is that a retaining ring is also fitted on the rod body on the side away from the rod head of the third fixing ring; a second convex ring is also radially extended on the rod body; an annular groove is formed between the second convex ring and the first convex ring; the retaining ring is fitted in the annular groove; the retaining ring contacts the third fixing ring.
[0017] A further technical solution is to provide a chamfer between the end face of the second convex ring away from the first convex ring and the circumferential surface of the second convex ring.
[0018] A further technical solution is that the first fixing ring is divided into two half-rings.
[0019] A further technical solution is that a groove and a through hole communicating with the bottom of the groove are formed on the valve core body; when the rod is connected to the valve core body, the rod passes through the valve core body along the through hole; the rod head is disposed in the groove; the rod head contacts the bottom of the groove.
[0020] A further technical solution is that a boss extends from the valve core body; the through hole passes through the boss.
[0021] The beneficial technical effects of this utility model are as follows:
[0022] (1) The valve core and stem connection structure of this utility model includes a stem head and a first fixing ring on the stem body, which fix the valve core body to the stem body. The stem head and stem body can be an integral structure to ensure the structural strength between the stem body and the stem head. The stem body also has a shoulder and a second fixing ring, which is threadedly connected to the stem body. The second fixing ring and the shoulder work together to disperse the axial force of the first fixing ring, ensuring that the first fixing ring abuts against and restricts the position of the valve core body, thereby fixing the valve core body and the stem body. Moreover, the structure of the first fixing ring and the second fixing ring is a weld-free structure, which facilitates quick disassembly and assembly of the valve core body and the stem body, and facilitates the maintenance of the valve core and stem connection structure, thereby reducing the maintenance cost of the valve core and stem structure.
[0023] (2) Further, a first hole is made on the second fixing ring. The first fixing ring is placed in the first hole and is wrapped by the second fixing ring, so that the second fixing ring can disperse the axial force of the first fixing ring while dispersing the radial force of the first fixing ring, so as to better support the first fixing ring and enhance the structural stability of the first fixing ring.
[0024] (3) Furthermore, the first fixing ring is split into two half rings, which makes it easy to put the first fixing ring on the rod. Attached Figure Description
[0025] Figure 1 The diagram shows a valve core and valve stem connection structure according to an embodiment of the present disclosure, and is an assembly structure diagram within a valve.
[0026] Figure 2 A partially enlarged schematic diagram of a valve core and valve stem connection structure according to an embodiment of the present disclosure is shown.
[0027] Figure 3 The diagram shows a front view of the valve stem in a valve core and valve stem connection structure according to an embodiment of the present disclosure.
[0028] Figure 4 The diagram shows a top view of the first fixing ring in a valve core and valve stem connection structure according to an embodiment of the present disclosure.
[0029] Figure 5 The diagram shows a top view of the valve core and valve stem connection structure according to an embodiment of the present disclosure, including a third fixing ring.
[0030] Marked in the attached diagram:
[0031] 1. Valve core body; 11. Through hole; 12. Groove; 13. Boss; 2. Rod body; 21. Rod head; 22. First convex ring; 221. Shoulder; 23. Annular groove; 24. Second convex ring; 241. Chamfer; 3. First fixing ring; 31. Half ring; 4. Second fixing ring; 41. First hole; 42. Second hole; 5. Third fixing ring; 51. Polygonal contact surface; 6. Retaining ring. Detailed Implementation
[0032] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.
[0033] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0034] Figure 1 The diagram shows a valve core and valve stem connection structure according to an embodiment of the present disclosure, and is an assembly structure diagram within a valve. Figure 2 A partially enlarged schematic diagram of a valve core and valve stem connection structure according to an embodiment of the present disclosure is shown. Figure 3 The diagram shows a front view of the valve stem in a valve core and stem connection structure according to an embodiment of this disclosure. Please refer to... Figure 1 , Figure 2 and Figure 3The valve core and stem connection structure includes a stem body 2 with a radial shoulder 221. A stem head 21 extends radially from the end of the stem body 2. A first retaining ring 3 is fitted onto the stem body 2 between the stem head 21 and the shoulder 221. When the valve core body 1 is connected to the stem body 2, the valve core body 1 is positioned on the stem body 2 between the stem head 21 and the first retaining ring 3, and the valve core body 1 contacts the stem head 21. The stem head 21 and the first retaining ring 3 fix the valve core body 1 onto the stem body 2. A second retaining ring 4 is fitted onto the stem body 2 on the side of the first retaining ring 3 away from the stem head 21. The second retaining ring 4 is threaded onto the stem body 2. The second retaining ring 4 contacts the first retaining ring 3. The opposite side of the first retaining ring 3 contacts the valve core body 1 and the shoulder 221, respectively. The second retaining ring 4 and the shoulder 221 cooperate to disperse the axial force of the first retaining ring 3, ensuring that the first retaining ring 3 abuts against and restricts the position of the valve core body 1, thereby fixing the valve core body 1 and the stem body 2. Furthermore, the first fixing ring 3 and the second fixing ring 4 are weld-free structures, which facilitates quick disassembly and assembly of the valve core body 1 and the rod body 2, and facilitates the maintenance of the valve core and valve stem connection structure, thereby reducing the maintenance cost of the valve core and valve stem structure.
[0035] The shaft 2 and the shaft head 21 can be a single integrated structure to ensure structural strength. Alternatively, the shaft 2 and the shaft head 21 can be two separate components, connected by welding, threaded connections, or other methods.
[0036] Please refer to Figure 2 and Figure 3 A first protruding ring 22 extends radially from the rod body 2. The circumferential surface of the first protruding ring 22 is provided with an external thread, through which the second fixing ring 4 is connected to the rod body 2. The end face of the first protruding ring 22 near the rod head 21 is a shoulder 221, which contacts the end face of the first fixing ring 3 away from the rod head 21 to support and fix the first fixing ring 3 on the rod body 2.
[0037] Preferably, a retaining ring 6 is also fitted onto the rod body 2 on the side of the third fixing ring 5 away from the rod head 21. A second convex ring 24 is also radially extended onto the rod body 2. An annular groove 23 is formed between the second convex ring 24 and the first convex ring 22. The retaining ring 6 is fitted into the annular groove 23. The inner wall of the annular groove 23 restricts the position of the retaining ring 6 on the rod body 2. The retaining ring 6 contacts, supports, and fixes the third fixing ring 5, and disperses the axial force of the third fixing ring 5 through the retaining ring 6.
[0038] More preferably, a chamfer 241 is provided between the end face of the second convex ring 24 away from the first convex ring 22 and the circumferential surface of the second convex ring 24. This facilitates the second fixing ring 4, the third fixing ring 5, and the retaining ring 6 to pass over the second convex ring 24 and be fitted onto the rod body 2.
[0039] Figure 4 The diagram shows a top view of the valve core and stem connection structure according to an embodiment of the present disclosure, including a schematic diagram of the first retaining ring. Figure 5 The diagram shows a top view of the valve core and stem connection structure according to an embodiment of this disclosure, including the third retaining ring. Please refer to... Figure 2 , Figure 4 and Figure 5 A first hole 41 and a second hole 42 are coaxially formed on the second fixing ring 4. The inner diameter of the first hole 41 is larger than the inner diameter of the second hole 42, and the first hole 41 is a blind hole. The rod 2 passes through the second fixing ring 4 along the first hole 41 and the second hole 42. The first fixing ring 3 is disposed inside the first hole 41, and the first fixing ring 3 contacts the bottom of the first hole 41. An internal thread is provided on the inner wall of the second hole 42. The first fixing ring 3 is disposed inside the first hole 41 and is wrapped by the second fixing ring 4, so that the second fixing ring 4 can disperse the axial force of the first fixing ring 3 and the radial force of the first fixing ring 3, so as to better support the first fixing ring 3 and enhance the structural stability of the first fixing ring 3.
[0040] Preferably, the device further includes a third retaining ring 5, which is disposed on the rod body 2 on the side of the second retaining ring 4 away from the rod head 21. The third retaining ring 5 is threadedly connected to the rod body 2. The third retaining ring 5 contacts the second retaining ring 4 and disperses the axial force of the second retaining ring 4. The third retaining ring 5 has a polygonal contact surface 51 formed by a combination of multiple planes parallel to the outer surface of the rod body 2. The plane facilitates tightening the third retaining ring 5 onto the rod body 2 using tools such as wrenches.
[0041] In some embodiments, the polygonal contact surface 51 is a hexagonal structure. Each face of the hexagonal polygonal contact surface 51 has a contact angle of 60°. This 60° contact angle allows the wrench to be rotated only 60° to change the point of application when the third fixing ring 5 is turned, making operation flexible and space-saving. Furthermore, the hexagonal structure results in high material utilization and less scrap material for the same circumscribed circle diameter, reducing production costs.
[0042] In the above embodiments, the second fixing ring 4 and the third fixing ring 5 are two independent components. However, in other embodiments, the second fixing ring 4 and the third fixing ring 5 can also be an independent integral structure, further reducing the number of components.
[0043] More preferably, the first fixing ring 3 is divided into two half rings 31, which makes it easier to fit the first fixing ring 3 onto the rod body 2.
[0044] Please refer to Figure 2 and Figure 3The valve core body 1 has a groove 12 and a through hole 11 connecting the bottom of the groove 12. When the rod 2 is connected to the valve core body 1, the rod 2 passes through the valve core body 1 along the through hole 11. The rod head 21 is set in the groove 12 and contacts the bottom of the groove 12. The rod head 21 is set in the groove 12, which reduces the probability of the rod head 21 being squeezed by external force, thereby improving the stability of the rod body 2.
[0045] Preferably, a boss 13 extends from the valve core body 1. A through hole 11 passes through the boss 13. The first retaining ring 3 contacts the valve core body 1 through the boss 13. The structure of the boss 13 allows only the surface of the boss 13 away from the valve core body 1 to be machined, eliminating the need to process a large area of the blank surface on the valve core body 1, thus reducing the amount of machining.
[0046] The specific assembly process of this utility model is as follows:
[0047] The operator first moves rod 2 through the through hole 11 into valve core body 1 until rod head 21 abuts the bottom of groove 12. First fixing ring 3 is fitted onto rod 2, positioned between shoulder 221 and valve core body 1. Second fixing ring 4 is threaded onto rod 2 until first fixing ring 3 moves into first hole 41 and contacts valve core body 1. Third fixing ring 5 is threaded onto rod 2 until it contacts second fixing ring 4. Retaining ring 6 is fitted onto rod 2, positioned within annular groove 23, between first convex ring 22 and second convex ring 24, and contacts third fixing ring 5.
[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A valve core and valve stem connection structure, characterized in that, The valve core and valve stem connection structure includes: The rod body has a radial shoulder; the end of the rod body extends radially to form a rod head; The first retaining ring is fitted onto the rod body between the rod head and the shoulder; The second fixing ring is sleeved on the rod body on the side of the first fixing ring away from the rod head; When the valve core body is connected to the rod body, the valve core body is disposed on the rod body between the rod head and the first fixing ring, and the valve core body contacts the rod head; the opposite side of the first fixing ring contacts the valve core body and the shoulder respectively; the second fixing ring is threadedly connected to the rod body; the second fixing ring contacts the first fixing ring.
2. The valve core and valve stem connection structure as described in claim 1, characterized in that: The second fixing ring has a first hole and a second hole coaxially formed on it; the inner diameter of the first hole is larger than the inner diameter of the second hole, and the first hole is a blind hole; the rod passes through the second fixing ring along the first hole and the second hole; the first fixing ring is set in the first hole and contacts the bottom of the first hole; the inner wall of the second hole is provided with internal threads.
3. The valve core and valve stem connection structure as described in claim 1, characterized in that: A first convex ring extends radially from the rod body; the circumferential surface of the first convex ring is provided with an external thread; the end face of the first convex ring near the rod head is the shoulder.
4. The valve core and valve stem connection structure as described in claim 3, characterized in that: It also includes a third fixing ring, which is disposed on the rod body on the side of the second fixing ring away from the rod head; the third fixing ring is threaded to the rod body; the third fixing ring contacts the second fixing ring.
5. The valve core and valve stem connection structure as described in claim 4, characterized in that: The third fixing ring is parallel to the outer surface of the rod and is a polygonal contact surface formed by the combination of multiple planes.
6. The valve core and valve stem connection structure as described in claim 4, characterized in that: A retaining ring is also fitted on the rod body on the side of the third fixing ring away from the rod head; a second convex ring is also radially extended on the rod body; an annular groove is formed between the second convex ring and the first convex ring; the retaining ring is fitted inside the annular groove; the retaining ring contacts the third fixing ring.
7. The valve core and valve stem connection structure as described in claim 6, characterized in that: A chamfer is provided between the end face of the second convex ring away from the first convex ring and the circumferential surface of the second convex ring.
8. The valve core and valve stem connection structure as described in claim 1, characterized in that: The first fixed ring is divided into two half-rings.
9. The valve core and valve stem connection structure as described in claim 1, characterized in that: The valve core body has a groove and a through hole communicating with the bottom of the groove; when the rod is connected to the valve core body, the rod passes through the valve core body along the through hole; the rod head is disposed in the groove; the rod head contacts the bottom of the groove.
10. The valve core and valve stem connection structure as described in claim 9, characterized in that: A boss extends from the valve core body; the through hole passes through the boss.