A valve stem connection structure

Abstract

The utility model relates to a valve rod connecting structure, including valve body, end cover, valve plate, valve rod and handle, the lower extreme of valve rod is equipped with the plug, and the plug hole cooperation of valve plate upper end is inserted, the outer sleeve of valve rod is equipped with the compression ring and rubber ring, and the rubber ring is sleeved in the outside of conical head, and the compression ring is compressed by compression sleeve, makes the radial expansion of rubber ring under the extrusion of conical head, realizes the sealing effect, the compression sleeve is connected in the support sleeve through screw thread, and the outside is equipped with the rotating ring and the poking block, is used for the convenient adjustment of compression degree, the upper end of valve rod is equipped with the connector and rotatable baffle rod, and the baffle rod is through the rotation and is inserted into the limiting recess of installation sleeve, realizes the quick positioning and dismounting of handle. This structure is convenient to assemble, and the sealing is reliable, is applicable to the valve structure of various needs quick connection and dismounting.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a valve stem connection structure. Background Technology

[0002] Valves, as common control components in industrial fluid piping systems, are widely used in water treatment, petrochemicals, heating and cooling systems, and other fields. The valve stem, as a key component connecting the actuator (such as a handle or electric actuator) and the valve core, directly affects the valve's operational reliability and sealing performance through its installation and sealing quality. In traditional structures, valve stem connections often rely on threaded connections, pin connections, or welding. These connection methods are not only cumbersome to install and inefficient, but also prone to damage during disassembly and maintenance, increasing the difficulty and cost of equipment maintenance.

[0003] On the other hand, in achieving a seal between the valve stem and the valve body, traditional structures typically employ a single compression seal or packing seal. However, under conditions of high pressure, water hammer, or frequent opening and closing, the sealing ring is prone to deformation, aging, or leakage, failing to guarantee long-term sealing reliability. Furthermore, traditional valve stem and manual handle connections are mostly threaded or pin-mounted, resulting in poor fit accuracy, difficulty in adjusting the assembly position, and time-consuming installation, hindering rapid disassembly and efficient replacement.

[0004] Therefore, existing technologies still have many limitations in terms of rapid assembly of valve stem and valve body, sealing reliability, and linkage installation with the handle. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a valve stem connection structure that is quick to install, has good sealing performance, and is easy to maintain, so as to improve the overall performance and ease of use of the valve.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A valve stem connection structure includes a valve body, a valve plate, a handle, and a valve stem. The upper end of the valve body is open, and an end cap is installed at the upper port of the valve body. The valve plate is installed in the valve cavity of the valve body, and the upper end of the valve plate is rotatably mounted on the end cap. The handle is installed on the upper end of the valve stem, and the handle and the valve stem are detachably connected. The lower end of the valve stem passes through the end cover and is inserted into the upper end of the valve plate. The rotation of the valve stem drives the valve plate to rotate. A rubber ring is fitted between the lower end of the valve stem and the upper end of the valve plate. A clamping sleeve is installed on the upper end of the end cap, which can press the valve stem downward for adjustment.

[0007] Furthermore, a square plug is fixed to the lower end of the valve stem, and the valve stem is fixed to the pressure ring near the lower end.

[0008] Furthermore, a connector that passes through the handle is fixed to the upper end of the valve stem, and a horizontally rotatable stop bar is installed at the upper end of the connector. Spherical protrusions are provided on the lower side of the stop bar near both ends.

[0009] Furthermore, a rotating column is fixed to the upper end of the valve plate and inserted into the end cover. A conical head is provided at the upper end of the rotating column, and a square insertion hole is opened on the upper end face of the conical head. The lower end of the rubber ring is fitted onto the upper end of the conical head.

[0010] Furthermore, a retaining plate is fixed on the lower side of the end cap and inserted into the upper port of the valve body, and an upwardly extending support sleeve is fixed at the center of the end cap, with an internal thread on the inner side of the upper port of the support sleeve.

[0011] Furthermore, the outer side of the lower end of the clamping sleeve is provided with an external thread, and the upper end of the clamping sleeve is fixed with a rotating ring, and several actuating blocks are fixed on the outer circumferential surface of the rotating ring.

[0012] Furthermore, a mounting sleeve is fixed at the center of the handle and fits onto the connector head. The inner wall of the mounting sleeve has a clearance groove for the stop bar to pass through.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention features a plug at the lower end of the valve stem, which inserts into a socket at the upper end of the valve plate. Combined with a rubber ring, pressure ring, and conical head, this creates a compact and easy-to-assemble connection structure, effectively solving the problems of complex assembly, misalignment, and low efficiency in traditional valve stem connections. The pressure ring at the lower end of the valve stem, under the axial action of the clamping sleeve, compresses the rubber ring, causing it to expand radially on the surface of the conical head. This results in a tight fit between the rubber ring and the inner wall of the support sleeve, enhancing the sealing performance after valve stem installation, effectively preventing media leakage, and improving connection reliability.

[0014] This invention achieves gradual tightening control of the pressure ring and rubber ring by providing an internal thread in the support sleeve, which mates with the external thread on the clamping sleeve. Users can complete the assembly process by applying manual torque through the toggle block, without the need for special tools, which greatly improves on-site installation efficiency and reduces sealing failure caused by thread mismatch or insufficient pressure.

[0015] This invention features a connector at the upper end of the valve stem, along with a locking structure consisting of a rotatable stop rod, a mounting sleeve, and a limiting groove. This achieves quick connection and locking of the handle, effectively avoiding the inconvenience, unstable positioning, and loosening problems associated with traditional screw or pin connections. The engagement of the protrusion and groove after the stop rod rotates allows for quick installation and disassembly of the handle without additional fasteners, facilitating maintenance and replacement, and improving operational safety and ease of assembly. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a perspective view of the present utility model; Figure 3 This is a schematic diagram of the valve stem of this utility model; Figure 4 This is a schematic diagram of the valve plate of this utility model; Figure 5 This is a schematic diagram of the end cap of this utility model; Figure 6 This is a schematic diagram of the clamping sleeve of this utility model; Figure 7 This is a schematic diagram of the rotating handle of this utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1. Valve body; 2. Valve plate; 21. Rotating column; 22. Conical head; 23. Insertion hole; 3. End cap; 31. Clamping platform; 32. Support sleeve; 33. Internal thread; 4. Clamping sleeve; 41. External thread; 42. Actuating block; 43. Rotating ring; 5. Rotating handle; 51. Mounting sleeve; 52. Relief groove; 6. Valve stem; 61. Stop rod; 62. Connector; 63. Pressure ring; 64. Plug; 7. Rubber ring. Detailed Implementation

[0018] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0019] like Figure 1 and Figure 2As shown, a valve stem connection structure includes a valve body 1, a valve plate 2, a handle 5, and a valve stem 6. The upper end of the valve body 1 is open, and an end cap 3 is installed at the upper port of the valve body 1. The valve plate 2 is installed inside the valve cavity of the valve body 1, and the upper end of the valve plate 2 is rotatably mounted on the end cap 3. The valve body 1 serves as the main channel for the entire valve structure. The end cap 3 and the valve body 1 are connected by a snap-fit ​​seal to prevent leakage of the medium inside the valve body. The handle 5 is installed at the upper end of the valve stem 6, and the handle 5 is detachably connected to the valve stem 6. The lower end of the valve stem 6 passes through the end cap 3 and is inserted into the upper end of the valve plate 2. The valve stem 6 rotates, causing the valve plate 2 to rotate. Through the above structural design, the valve plate 2 can be flexibly driven, which is suitable for various fluid control scenarios. A rubber ring 7 is fitted between the lower end of the valve stem 6 and the upper end of the valve plate 2. The rubber ring 7 forms a sealing structure with the support sleeve 32 through elastic deformation, which prevents medium leakage. A clamping sleeve 4 is installed on the upper end of the end cover 3 and is fitted on the outside of the valve stem 6. The clamping sleeve 4 can press the valve stem 6 downward to adjust it, thereby simultaneously applying pressure to the pressure ring 63 and the rubber ring 7, ensuring a stable and reliable connection and improving the sealing performance.

[0020] like Figure 2 As shown, a square plug 64 is fixed to the lower end of the valve stem 6, and a pressure ring 63 is fixed near the lower end of the valve stem 6. The plug 64 is inserted into the socket 23 on the conical head 22, forming a stable torque transmission structure. The pressure ring 63 is located above the rubber ring 7 and is fixed to the inside of the support sleeve 32 by the downward pressure of the clamping sleeve 4, thereby realizing synchronous compression of the rubber ring 7. During the clamping process, the rubber ring 7 expands radially on the surface of the conical head 22 after being compressed, enhancing the sealing performance between the valve stem 6 and the support sleeve 32. This structure solves the problems of cumbersome installation and poor sealing performance of traditional structures, and improves assembly efficiency and operational safety.

[0021] like Figure 3 As shown, a connector 62 that passes through the handle 5 is fixed to the upper end of the valve stem 6. A horizontally rotatable stop bar 61 is installed at the upper end of the connector 62. Spherical protrusions are provided on the lower side of the stop bar 61 near both ends. The connector 62 is an integrally formed structure, which ensures the axial stability between the handle 5 and the valve stem 6 through a tight fit. The stop bar 61 is made of metal and can rotate horizontally on the connector 62. During the rotation, it achieves a quick locking function through the protrusions and the groove of the mounting sleeve 51. This structure facilitates the quick disassembly and installation of the handle 5, solves the problem of time-consuming and unstable assembly in the prior art, and improves the convenience of maintenance and the reliability of operation.

[0022] like Figure 4As shown, a rotating column 21 is fixed at the upper end of the valve plate 2 and inserted into the end cover 3. A conical head 22 is provided at the upper end of the rotating column 21. A square insertion hole 23 is opened on the upper end face of the conical head 22. The lower end of the rubber ring 7 is fitted onto the upper end of the conical head 22. The rotating column 21 achieves smooth rotation through cooperation with the end cover 3. The conical head 22 achieves compression and expansion of the rubber ring 7 through the conical surface structure. The insertion hole 23 and the plug 64 are complementary in shape and form a gapless connection after insertion. This structure can compress and deform the rubber ring 7 through the synergistic action of the pressure ring 63 and the clamping sleeve 4 after the valve stem 6 is inserted, thereby achieving efficient sealing of the valve stem 6, avoiding leakage of the working medium and improving the system sealing durability.

[0023] like Figure 5 As shown, a retaining plate 31 is fixed to the lower side of the end cap 3 and is inserted into the upper port of the valve body 1. An upwardly extending support sleeve 32 is fixed to the center of the end cap 3. An internal thread 33 is provided on the inner side of the upper port of the support sleeve 32. The retaining plate 31 and the valve body 1 are installed by an interference fit to ensure a reliable connection between the end cap 3 and the valve body 1 under high pressure. The internal thread 33 of the support sleeve 32 is fitted with the external thread 41 on the clamping sleeve 4. When screwed on, the pressure ring 63 and the rubber ring 7 can be gradually pressed down. This structure simplifies the traditional sealing and clamping process and realizes a convenient structural solution that can be installed without additional tools, thus enhancing maintenance flexibility.

[0024] like Figure 6 As shown, the outer side of the lower end of the clamping sleeve 4 is provided with an external thread 41, and the upper end of the clamping sleeve 4 is fixed with a rotating ring 43. Several actuating blocks 42 are fixed on the outer circumferential surface of the rotating ring 43. The clamping sleeve 4 is screwed into the support sleeve 32 with the internal thread 33 through the external thread 41, and manual operation is achieved through the rotating ring 43. The actuating blocks 42 are arranged at intervals on the outer circumference of the rotating ring 43 to enhance the friction when the hand applies force, making the clamping operation easier and less strenuous. This structure, combined with the deformation sealing effect of the rubber ring 7, provides sufficient axial clamping force when clamping, and achieves the technical effect of simultaneous installation and sealing of the valve stem 6.

[0025] like Figure 7 As shown, a mounting sleeve 51 is fixed at the center of the rotating handle 5 and fitted onto the connector 62. A clearance groove 52 is provided on the inner wall of the mounting sleeve 51 for the stop rod 61 to pass through. The stop rod 61 passes through the clearance groove 52 and rotates 90° to block and limit the rotation of the rotating handle 5. A groove is provided on the upper end face of the mounting sleeve 51 to mate with spherical protrusions. The mounting sleeve 51 is connected to the connector 62 through an interference fit. During rotation, the stop rod 61 is locked in place by the spherical protrusions at both ends embedding into the groove, thus preventing the rotating handle 5 from falling off or loosening during operation. This structure effectively solves the problems of loose connection and inaccurate positioning in the prior art, improving assembly firmness and safety of use.

[0026] The working principle of this utility model is as follows: When installing the valve stem 6, the rubber ring 7 is placed inside the support sleeve 32, and the rubber ring 7 is fitted on the conical head 22 at the upper end of the rotating column 21. At this time, the pressure ring 63 at the lower end of the valve stem 6 is inserted into the support sleeve 32, and the plug 64 is inserted into the socket 23. Finally, the clamping sleeve 4 is screwed into the support sleeve 32 and the pressure ring 63 is pressed down to complete the installation of the valve stem 6, thereby completing the quick installation of the valve stem 6 and facilitating the subsequent disassembly of the valve stem 6. When the compression sleeve 4 presses down on the pressure ring 63, it also presses down on the rubber ring 7. At this time, the rubber ring 7 expands under the action of the conical head 22, thereby completing the sealing of the valve stem 6 in the support sleeve 32. When installing the handle 5, the handle 5 is adjusted so that the relief groove 52 in the mounting sleeve 51 cooperates with the stop rod 61, so that the mounting sleeve 51 is put on the connector 62. Then the stop rod 61 is rotated 90º so that the spherical protrusion is locked in the groove for limiting and locking. The stop rod 61 then blocks the handle 5, thereby completing the quick installation of the handle 5.

[0027] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A valve stem connection structure, comprising a valve body (1), a valve plate (2), a handle (5), and a valve stem (6), characterized in that: The valve body (1) has an opening at the upper end, and an end cap (3) is installed at the upper port of the valve body (1). The valve plate (2) is installed in the valve cavity of the valve body (1), and the upper end of the valve plate (2) is rotatably installed on the end cap (3). The handle (5) is installed on the upper end of the valve stem (6), and the handle (5) and the valve stem (6) are detachably connected. The lower end of the valve stem (6) passes through the end cover (3) and is inserted into the upper end of the valve plate (2). The valve stem (6) rotates and drives the valve plate (2) to rotate. A rubber ring (7) is fitted between the lower end of the valve stem (6) and the upper end of the valve plate (2). A clamping sleeve (4) is installed on the upper end of the end cap (3) and is fitted on the outside of the valve stem (6). The clamping sleeve (4) can press the valve stem (6) downward for adjustment.

2. The valve stem connection structure according to claim 1, characterized in that: The lower end of the valve stem (6) is fixed with a square plug (64), and the valve stem (6) is fixed to the pressure ring (63) near the lower end.

3. The valve stem connection structure according to claim 2, characterized in that: The upper end of the valve stem (6) is fixed with a connector (62) that passes through the handle (5). The upper end of the connector (62) is equipped with a horizontally rotatable stop bar (61). The lower side of the stop bar (61) is provided with spherical protrusions near both ends.

4. The valve stem connection structure according to claim 2, characterized in that: The upper end of the valve plate (2) is fixed with a rotating column (21) inserted into the end cover (3). The upper end of the rotating column (21) is provided with a conical head (22). The upper end face of the conical head (22) is provided with a square insertion hole (23). The lower end of the rubber ring (7) is fitted onto the upper end of the conical head (22).

5. The valve stem connection structure according to claim 4, characterized in that: The end cap (3) has a locking plate (31) fixed on the lower side of the valve body (1) and a support sleeve (32) extending upward is fixed at the center of the end cap (3). The support sleeve (32) has an internal thread (33) on the inner side of the upper port.

6. The valve stem connection structure according to claim 5, characterized in that: The lower end of the clamping sleeve (4) is provided with an external thread (41), and the upper end of the clamping sleeve (4) is fixed with a rotating ring (43), and a number of actuating blocks (42) are fixed on the outer circumferential surface of the rotating ring (43).

7. The valve stem connection structure according to claim 3, characterized in that: The center of the rotating handle (5) is fixed with an installation sleeve (51) that is sleeved on the connector (62), and the inner wall of the installation sleeve (51) is provided with a relief groove (52) for the stop rod (61) to pass through.

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