A valve connection unit

Abstract

The utility model relates to a valve connecting unit, include: ball head sleeve, hollow column shape has upper port and lower port, push rod subassembly, install in ball head sleeve from upper port, valve stem subassembly, install in ball head sleeve from lower port, with ball head sleeve is connected through screw pair, ball head joint, install in ball head sleeve in between push rod subassembly with valve stem subassembly, set up the ball socket structure in the inner end of push rod subassembly with the inner end of valve stem subassembly, with ball head joint cooperation installation. The utility model embodiment retains installation margin (need not strictly coaxial) to eliminate valve stroke deviation, can simplify assembly, promote efficiency.

Description

Technical Field

[0001] This utility model relates to valve devices, specifically to a valve connection unit. Background Technology

[0002] High-pressure and overpressure valves are widely used in industries such as petroleum, natural gas, coal chemical, and polymer material production. These products are used in complex operating conditions, require high design precision, and have strict assembly processes. However, the high frequency of operation and significant vibration during valve operation make them prone to damage, limiting their long-term stable operation. Typical valve connection structures use rigid connections, which are susceptible to assembly deviations leading to valve jamming and internal component damage. Furthermore, loosening of the connection structure during valve operation can cause anything from valve malfunction to plant shutdown, severely impacting production safety and efficiency.

[0003] 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

[0004] To address the shortcomings of existing technologies, this utility model discloses a valve connection unit.

[0005] The technical solution adopted in this embodiment of the utility model is as follows: A valve connection unit includes: a ball head sleeve, which is hollow and cylindrical, having an upper port and a lower port; a push rod assembly installed on the ball head sleeve from the upper port; a valve stem assembly installed on the ball head sleeve from the lower port and connected to the ball head sleeve via a threaded pair; and a ball joint installed inside the ball head sleeve and located between the push rod assembly and the valve stem assembly; a ball socket structure is provided at the inner end of both the push rod assembly and the valve stem assembly, which cooperates with the ball joint for installation.

[0006] A further technical solution is that the valve stem assembly includes a valve stem and an adjusting ball threaded sleeve; the valve stem is axially adjustable to the inner cavity of the adjusting ball threaded sleeve; the outer wall of the adjusting ball threaded sleeve is connected to the inner wall of the ball sleeve through a threaded pair.

[0007] A further technical solution is that the valve stem is axially adjustable to the adjusting ball head threaded sleeve via a threaded pair.

[0008] A further technical solution is that the adjustable distance between the bottom end of the valve stem and the bottom of the inner wall of the adjusting ball thread sleeve is 0 to a predetermined stroke.

[0009] A further technical solution is that the first set screw passes through the side wall of the ball head sleeve and presses against the adjusting ball head threaded sleeve, so that the adjusting ball head threaded sleeve is relatively fixed to the ball head sleeve.

[0010] A further technical solution is that a locking nut is installed on the outer wall of the valve stem, and after the position of the valve stem is adjusted, the valve stem is fastened to the adjusting ball thread sleeve.

[0011] A further technical solution is that the push rod assembly includes an actuator push rod and a ball-head threaded sleeve; the actuator push rod is axially adjustable and connected to the ball-head threaded sleeve; the ball-head threaded sleeve is installed in the ball-head sleeve.

[0012] A further technical solution is that there is a radial gap between the ball-head threaded sleeve and the ball-head sleeve.

[0013] A further technical solution is that an annular inner flange is provided at the upper end of the ball head sleeve; the lower surface of the inner flange is an arc surface; the upper end surface of the side wall of the ball head threaded sleeve is an arc surface, and the lower surface of the inner flange and the upper end surface form a spherical fit.

[0014] A further technical solution is to install a travel limiting sleeve on one side of the upper port of the ball head sleeve; after the position of the actuator push rod is adjusted, the second set screw passes through the side wall of the travel limiting sleeve and presses against the actuator push rod.

[0015] The beneficial effects of this utility model embodiment are as follows: In this embodiment of the invention, the ball joint contacts the ball socket of the push rod and valve stem, allowing for slight oscillation in three-dimensional space, thus preventing jamming and damage caused by assembly deviations in rigid connections. The valve stem is threadedly connected to the ball sleeve; tightening eliminates axial clearance, achieving zero-clearance installation. This combination of rigidity and flexibility retains installation margin (eliminating the need for strict coaxiality) while eliminating valve stroke deviations, simplifying assembly and improving efficiency.

[0016] Furthermore, the push rod assembly and valve stem assembly are installed with the ball joint, and the ball thread sleeve and ball sleeve also have a spherical fit relationship. No strict axial alignment is required whether the actuator push rod is moving up or down. The universal joint function also reduces the precision requirements of product parts and assembly, simplifies the assembly process, and improves assembly efficiency.

[0017] The radial clearance between the ball-end threaded sleeve and the ball-end sleeve also allows for a certain degree of free adjustment of the actuator push rod's large displacement.

[0018] Adjusting the axial zero-clearance installation of the ball head threaded sleeve and ball head sleeve eliminates valve errors caused by installation clearance.

[0019] The threaded connection between the valve stem and the adjusting ball head threaded sleeve allows the valve to freely adjust its stroke online. This enables precise adjustment of the valve stroke during installation, reduces assembly difficulty, and solves the problem of adjustment required by conventional connecting blocks. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the valve connection unit in an embodiment of the present utility model. Figure 2 This is a schematic diagram showing the position of the radial gap in an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the actuator push rod outputting an upward thrust in an embodiment of this utility model.

[0022] Figure 4 This is a schematic diagram of the actuator push rod outputting a downward thrust in an embodiment of this utility model.

[0023] In the diagram: 1. Actuator push rod; 2. Stroke limit sleeve; 3. Second set screw; 4. Ball head threaded sleeve; 5. Ball head sleeve; 6. Ball head joint; 7. Adjusting ball head threaded sleeve; 8. First set screw; 9. Locking nut; 10. Valve stem. Detailed Implementation

[0024] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the device proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer according to the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, only used to conveniently and clearly assist in illustrating the purpose of the embodiments of this utility model. Please refer to the accompanying drawings to make the objectives, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only used to complement the content disclosed in the specification, for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0026] Figure 1 This is a schematic diagram of the valve connection unit in an embodiment of the present utility model, as shown below. Figure 1As shown, the valve connection unit disclosed in this embodiment includes a ball sleeve 5, a push rod assembly, a valve stem assembly, and a ball joint 6. The ball sleeve 5 is a hollow cylindrical shape with an upper port and a lower port. The push rod assembly extends into the ball sleeve 5 from the upper port and is installed on the ball sleeve 5. The portion of the push rod assembly protruding from the ball sleeve 5 is used to connect to an actuator. The actuator is a power drive device used to output lifting or pushing force to drive the ball sleeve 5 and the valve stem assembly to move. The valve stem assembly extends into the ball sleeve 5 from the lower port and is installed on the ball sleeve 5, and is connected to the inner wall of the ball sleeve 5 via a threaded pair. The portion of the valve stem assembly protruding from the ball sleeve 5 is used to extend into the valve body and connect to the valve core structure. Finally, the valve core is driven to move by the lifting and lowering of the valve stem assembly, realizing the opening and closing of the valve or flow regulation. The specific structure of the power drive device and the valve is not the protected content of this utility model and can be implemented using existing technology, and will not be described in detail here.

[0027] The ball joint 6 is installed inside the ball sleeve 5 and is located between the push rod assembly and the valve stem assembly. Both the inner ends of the push rod assembly and the valve stem assembly have ball-and-socket structures that mate with the ball joint 6 from opposite directions. The inner end of the push rod assembly refers to the end face of the push rod assembly located inside the ball sleeve 5, and the same applies to the inner end of the valve stem assembly.

[0028] The ball joint 6, with its spherical contact with the inner ends of the push rod assembly and valve stem assembly, provides a certain degree of freedom of angular movement in three-dimensional space, solving the problems of jamming and damage caused by assembly deviations in conventional rigid connections. The valve stem assembly and ball sleeve 5 are connected by a threaded pair; tightening the threads eliminates axial clearance, achieving zero-clearance axial installation. This combination of flexible connection resulting from spherical movement and rigid connection through threaded locking retains a certain installation margin, eliminating the need for strict coaxial installation, and also eliminates valve stroke deviations caused by the connection. This simplifies assembly and improves installation efficiency.

[0029] Furthermore, the actuator assembly includes an actuator push rod 1 and a ball-end threaded sleeve 4. The actuator push rod 1 is used to connect to the power drive device, and the ball-end threaded sleeve 4 is a hollow cylindrical structure with a bottom surface. The actuator push rod 1 is axially adjustable to the ball-end threaded sleeve 4 via a threaded pair. Specifically, the threaded pair includes an external thread machined on the outer wall of the actuator push rod 1 and an internal thread machined on the inner wall of the ball-end threaded sleeve 4. One end of the actuator push rod 1 is screwed into the ball-end threaded sleeve 4 and connected to the ball-end threaded sleeve 4 through a threaded fit. The outer bottom surface of the ball-end threaded sleeve 4 is provided with a ball-and-socket structure, which is installed in conjunction with the ball joint 6.

[0030] Furthermore, there is a radial gap between the ball-end threaded sleeve 4 and the ball-end sleeve 5. Figure 2 This is a schematic diagram showing the position of the radial gap in an embodiment of this utility model. For example... Figure 2 As shown, the radial clearance reduces the coaxiality requirement between the actuator push rod 1 and the valve stem 10, simplifying the machining and assembly of parts.

[0031] Furthermore, an annular inner flange is provided at the upper end of the ball-end sleeve 5. The lower surface of the inner flange is arc-shaped. The upper end face of the side wall of the ball-end threaded sleeve 4 is arc-shaped. The arc-shaped surface of the upper end face of the ball-end threaded sleeve 4 matches the arc-shaped surface of the lower surface of the inner flange, such as... Figure 1 As shown, the upper end face of the ball-head threaded sleeve 4 has a convex arc surface, while the lower surface of the inner flange has a concave arc surface. The lower surface of the inner flange and the upper end face form a spherical fit.

[0032] Furthermore, a stroke limiting sleeve 2 is installed on one side of the upper port of the ball head sleeve 5 to limit the length of the valve stroke B. After the position of the actuator push rod 1 is adjusted, the second set screw 3 passes through the side wall of the stroke limiting sleeve 2 and presses against the actuator push rod 1, thereby fixing the position of the actuator push rod 1 relatively.

[0033] Figure 3 This is a schematic diagram illustrating the upward thrust output of the actuator push rod in an embodiment of this utility model. Figure 3 As shown, when the actuator push rod 1 outputs an upward thrust F, the spherical joint at arrow C acts as a universal joint. When the force is applied at arrow C, the valve stem 10 is lifted upward through the ball head sleeve 5 and the adjusting ball head threaded sleeve 7, allowing a certain deviation between the axis of the actuator push rod 1 and the axis of the valve stem 10. Figure 4 This is a schematic diagram illustrating the downward thrust output of the actuator push rod in an embodiment of this utility model. Figure 4 As shown, when the actuator push rod 1 outputs a downward thrust F1, the spherical joint at arrow D acts as a universal joint. When the force is applied at arrow D, the valve stem 10 moves downward by adjusting the ball head threaded sleeve 7, and a certain deviation is allowed between the axis of the actuator push rod 1 and the axis of the valve stem 10.

[0034] Furthermore, the valve stem assembly includes a valve stem 10 and an adjusting ball threaded sleeve 7. The valve stem 10 is axially adjustable to the inner cavity of the adjusting ball threaded sleeve 7. More specifically, the valve stem 10 is axially adjustable to the adjusting ball threaded sleeve 7 via a threaded pair. Specifically, the threaded pair includes an external thread machined on the outer wall of the valve stem 10 and an internal thread machined on the inner cavity of the adjusting ball threaded sleeve 7. The valve stem 10 is connected to the adjusting ball threaded sleeve 7 via a threaded fit. When the valve stem 10 is rotated, the distance between the bottom end of the valve stem 10 and the bottom of the inner wall of the adjusting ball threaded sleeve 7 changes, with an adjustable range from 0 to a predetermined stroke A. During the rotation of the valve stem 10, the valve stroke B can be further precisely adjusted.

[0035] Figure 1This shows the case where the valve stem 10 is adjusted to its maximum stroke relative to the adjusting ball threaded sleeve 7, i.e., the predetermined stroke A. Figure 2 This shows the case where the stroke of the valve stem 10 relative to the adjusting ball threaded sleeve 7 is adjusted to its minimum, i.e., 0. Combined with... Figure 1 and Figure 2 It can be seen that rotating the valve stem 10 allows for precise adjustment within the range of 0 to the predetermined stroke A, based on the valve stroke B.

[0036] The adjusting ball head threaded sleeve 7 is connected to the inner wall of the ball head sleeve 5 via a threaded pair. Specifically, the threaded pair includes an external thread machined on the outer wall of the adjusting ball head threaded sleeve 7 and an internal thread machined on the inner wall of the ball head sleeve 5. Furthermore, the first set screw 8 passes through the side wall of the ball head sleeve 5 and presses against the adjusting ball head threaded sleeve 7, thus fixing the adjusting ball head threaded sleeve 7 to the ball head sleeve 5 in a relatively fixed connection. Through the threaded engagement between the ball head sleeve 5 and the adjusting ball head threaded sleeve 7, an axial zero-clearance fit is achieved in the connecting unit, eliminating valve stroke deviation caused by the connection.

[0037] Furthermore, a locking nut 9 is installed on the outer wall of the valve stem 10. After the position of the valve stem 10 is adjusted, the locking nut 9 is screwed to the end of the adjusting ball thread sleeve 7 to prevent the valve stem 10 from loosening.

[0038] 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.

[0039] 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 connection unit, characterized in that, include: The ball head sleeve (5) is a hollow column with an upper port and a lower port; The push rod assembly is mounted on the ball head sleeve (5) from the upper port. The valve stem assembly is installed from the lower port onto the ball head sleeve (5) and is connected to the ball head sleeve (5) via a threaded pair; The ball joint (6) is installed inside the ball sleeve (5) and located between the push rod assembly and the valve stem assembly; Both the inner end of the push rod assembly and the inner end of the valve stem assembly are provided with ball joint structures, which are installed in conjunction with the ball joint (6).

2. The valve connection unit according to claim 1, characterized in that, The valve stem assembly includes a valve stem (10) and an adjusting ball threaded sleeve (7); the valve stem (10) is axially adjustable to the inner cavity of the adjusting ball threaded sleeve (7); the outer wall of the adjusting ball threaded sleeve (7) is connected to the inner wall of the ball sleeve (5) through a threaded pair.

3. The valve connection unit according to claim 2, characterized in that, The valve stem (10) is axially adjustable to the adjusting ball head threaded sleeve (7) via a threaded pair.

4. The valve connection unit according to claim 3, characterized in that, The adjustable distance between the bottom end of the valve stem (10) and the bottom of the inner wall of the adjusting ball thread sleeve (7) is 0 to a predetermined stroke.

5. The valve connection unit according to claim 2, characterized in that, The first set screw (8) passes through the side wall of the ball head sleeve (5) and presses against the adjusting ball head threaded sleeve (7), so that the adjusting ball head threaded sleeve (7) is fixed relative to the ball head sleeve (5).

6. The valve connection unit according to claim 2, characterized in that, A locking nut (9) is installed on the outer wall of the valve stem (10). After the position of the valve stem (10) is adjusted, the valve stem (10) is fastened in the adjusting ball thread sleeve (7).

7. The valve connection unit according to claim 1, characterized in that, The push rod assembly includes an actuator push rod (1) and a ball head threaded sleeve (4); the actuator push rod (1) is axially adjustable and connected to the ball head threaded sleeve (4); the ball head threaded sleeve (4) is installed in the ball head sleeve (5).

8. The valve connection unit according to claim 7, characterized in that, There is a radial gap between the ball-head threaded sleeve (4) and the ball-head sleeve (5).

9. The valve connection unit according to claim 7, characterized in that, An annular inner flange is provided at the upper end of the ball head sleeve (5); the lower surface of the inner flange is an arc surface; the upper end surface of the side wall of the ball head threaded sleeve (4) is an arc surface, and the lower surface of the inner flange and the upper end surface form a spherical fit.

10. The valve connection unit according to claim 7, characterized in that, A travel limit sleeve (2) is installed on one side of the upper port of the ball head sleeve (5); after the position of the actuator push rod (1) is adjusted, the second set screw (3) passes through the side wall of the travel limit sleeve (2) and presses against the actuator push rod (1).

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