A transversely chamfered pin structure

Abstract

The utility model relates to a kind of transverse oblique cutting pin structures, including valve body, valve stem, butterfly plate, valve seat and at least one cross pin;The valve stem is set in the top of the valve body, the butterfly plate is rotationally connected in the inside of the valve body, a protruding part is integrally formed in the front side of the butterfly plate, one end of the valve stem extends to the inside of protruding part, the valve seat is installed in the inner circumferential wall of the valve body.The transverse oblique cutting pin structure, through the trapezoidal inclined surface of locking structure power transmission, drive cross pin transverse movement, actively eliminate the machining gap with valve stem, butterfly plate and valve stem synchronous action when valve opening and closing, the rotation angle error of butterfly plate is controlled in small range, in addition, locking structure moves limit block by bolt, without damaging any component to remove the fixation to cross pin, withdraw cross pin can separate valve stem and butterfly plate, it is convenient to repair or replace wear parts alone, greatly reduce maintenance cost and downtime loss.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a transverse oblique cutting pin structure. Background Technology

[0002] In the field of valve manufacturing and fluid control, the connection structure between the valve stem and the opening and closing element directly determines the valve's transmission accuracy, sealing reliability and service life. The transverse pin connection has become a common connection method for rotary valves due to its simple structure and high transmission efficiency.

[0003] Traditional transverse pin structures often use cylindrical or rectangular pins that mate with the cylindrical surface of the valve stem. Due to machining errors and assembly clearances, small gaps can easily form between the pin and the valve stem, leading to problems such as transmission lag and relative movement when the valve is opened and closed. This seriously affects the accuracy of flow control. Especially under high pressure and high frequency opening and closing conditions, the impact load caused by the gap can also aggravate component wear and shorten the valve's service life. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a transverse oblique cutting pin structure, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a transverse oblique-cut pin structure, comprising a valve body, a valve stem, a butterfly plate, a valve seat, and at least one transverse pin;

[0006] The valve stem is disposed through the top of the valve body, the butterfly plate is rotatably connected to the inside of the valve body, a protrusion is integrally formed on the front side of the butterfly plate, one end of the valve stem extends into the inside of the protrusion, the valve seat is installed on the inner peripheral wall of the valve body, and the butterfly plate is in contact with the valve seat;

[0007] At least one of the horizontal pins extends laterally through the interior of the protrusion and fits against the outer peripheral surface of the valve stem, with the side of the valve stem facing the horizontal pin being planar.

[0008] A locking structure that engages with the cross pin is provided on the left side of the protrusion.

[0009] Furthermore, the side of the transverse pin facing the valve stem is inclined and fits against the plane of the valve stem.

[0010] Furthermore, the cross-sectional shape of the side of the transverse pin is rectangular.

[0011] Furthermore, a vertically oriented mating hole for inserting the valve stem is provided inside the protrusion, and at least one horizontally oriented limiting hole for inserting at least one horizontal pin is provided inside the protrusion.

[0012] Furthermore, the limiting hole and the docking hole are in communication.

[0013] Furthermore, the locking structure includes a connecting hole longitudinally opened inside the horizontal pin, and a limiting block is inserted inside the connecting hole. The top cross-sections of the connecting hole and the limiting block are both trapezoidal, and the connecting hole fits against the two inclined surfaces of the limiting block.

[0014] Furthermore, a mounting seat is provided on the left side of the protrusion and in front of the cross pin. The front part of the mounting seat is welded to the front side of the protrusion. A bolt is threadedly connected to the front side of the mounting seat, and one end of the bolt is rotatably connected to the limiting block.

[0015] Furthermore, a square opening is provided on the rear side of the mounting base for the limiting block to pass through.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0017] This transverse oblique-cut pin structure transmits force through the trapezoidal oblique surface of the locking structure, driving the transverse pin to move laterally and actively eliminating the machining clearance with the valve stem. When the valve is opened and closed, the butterfly plate and the valve stem move synchronously, and the rotation angle error of the butterfly plate is controlled within a very small range. In addition, the locking structure controls the movement of the limit block through bolts, and the fixing of the transverse pin can be released without damaging any parts. The valve stem and butterfly plate can be separated by pulling out the transverse pin, which facilitates individual maintenance or replacement of worn parts, and greatly reduces maintenance costs and downtime losses. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the horizontal pin and valve stem of this utility model.

[0021] In the diagram: 1. Valve body; 2. Valve stem; 3. Butterfly plate; 4. Valve seat; 5. Horizontal pin; 6. Locking structure; 601. Limit block; 602. Mounting base; 603. Bolt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 In this embodiment, a transverse oblique cut pin structure is used to meet the precise transmission and sealing requirements of valve opening and closing control by fitting the transverse oblique cut pin with the flat valve stem and combining it with a detachable locking structure. It is compatible with various rotary valves such as butterfly valves.

[0024] Its structure mainly consists of valve body 1, valve stem 2, butterfly plate 3, valve seat 4, cross pin 5, and locking structure 6. The locking structure 6 is further subdivided into limit block 601, mounting base 602, and bolt 603. All components work together to achieve gapless transmission, convenient disassembly and assembly, and reliable locking function.

[0025] The valve body 1 is the basic load-bearing component of the valve, forming a fluid channel inside. The valve seat 4 is fixed to the inner circumferential wall by bolts. The valve seat 4 is made of elastic sealing material and is used to fit with the butterfly plate 3 to achieve sealing. A through hole is opened at the top of the valve body 1 for the valve stem 2 to pass through. The valve stem 2 extends into the interior of the valve body 1 and is connected to the butterfly plate 3 for driving the butterfly plate 3 to rotate, thereby realizing the opening and closing of the valve.

[0026] The butterfly plate 3 is rotatably connected inside the valve body 1, and its outer periphery is tightly fitted with the valve seat 4 to ensure sealing when closed. The front side of the butterfly plate 3 has an integrally formed protrusion. The protrusion has a vertically formed mating hole for the valve stem 2 to be inserted. The protrusion also has at least one horizontally formed limiting hole, which is connected to the mating hole for installing the horizontal pin 5. The horizontal pin 5 passes through the limiting hole laterally. Its side cross-section is rectangular. The side facing the valve stem 2 is set with an inclined surface, while the side facing the horizontal pin 5 is set with a flat surface. During the lateral insertion and extension process, the inclined surface of the horizontal pin 5 is tightly fitted with the flat surface of the valve stem 2 to eliminate machining gaps.

[0027] In detail, the locking structure 6 is installed on the left side of the protrusion to fix the position of the horizontal pin 5 and prevent it from shifting laterally; the front part of the mounting base 602 of the locking structure 6 is welded and fixed to the front side of the protrusion, and a square opening is opened on the rear side of the mounting base 602 for the limit block 601 to pass through; a connecting hole is opened longitudinally inside the horizontal pin 5, and the cross-section of the connecting hole and the top of the limit block 601 is trapezoidal, and the two inclined surfaces of the two fit together; a bolt 603 is threadedly connected to the front side of the mounting base 602, and one end of the bolt 603 is rotatably connected to the limit block 601. By rotating the bolt 603, the limit block 601 can be pushed to move along the square opening to lock or unlock the horizontal pin 5.

[0028] In practical applications, insert the bottom of the valve stem 2 into the mating hole of the protrusion of the butterfly plate 3, ensuring that the flat surface of the valve stem 2 faces the limiting hole side; insert the horizontal pin 5 laterally from the limiting hole of the protrusion, so that the inclined surface of the horizontal pin 5 is initially in contact with the flat surface of the valve stem 2; weld the mounting base 602 to the left side of the protrusion, and align the square opening of the mounting base 602 with the connecting hole of the horizontal pin 5; insert the limiting block 601 from the square opening, so that its trapezoidal top is in contact with the inclined surface of the connecting hole of the horizontal pin 5; screw the bolt 603 into the threaded hole of the mounting base 602 until one end of the bolt 603 is rotatably connected to the limiting block 601, completing the basic assembly.

[0029] Furthermore, by rotating the bolt 603 clockwise, the bolt 603 pushes the limiting block 601 to extend axially along the square opening towards the horizontal pin 5. Since the trapezoidal inclined surface of the limiting block 601 fits against the inclined surface of the connecting hole of the horizontal pin 5, the axially extending limiting block 601 will generate a lateral force on the horizontal pin 5, causing the horizontal pin 5 to move to the left along the limiting hole. During the leftward movement of the horizontal pin 5, its inclined surface gradually presses against the plane of the valve stem 2 until the machining gap between the two is completely eliminated, achieving a tight fit. Continue to fine-tune the bolt 603 to ensure that the horizontal pin 5 and the valve stem 2 are not loose, completing the dynamic locking. At this time, rotating the valve stem 2 can drive the butterfly plate 3 to rotate synchronously through the gapless fit, achieving precise opening and closing of the valve.

[0030] When maintenance is required, rotate bolt 603 counterclockwise. Bolt 603 will cause limit block 601 to retract axially away from horizontal pin 5. After limit block 601 retracts, the lateral clamping force on horizontal pin 5 is released, and horizontal pin 5 can be pulled out to the right along the limit hole. After horizontal pin 5 is pulled out, valve stem 2 and butterfly plate 3 are separated, and valve stem 2 and butterfly plate 3 can be taken out separately for maintenance or replacement.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transverse oblique cutting pin structure, characterized in that: It includes a valve body (1), a valve stem (2), a butterfly plate (3), a valve seat (4), and at least one cross pin (5); The valve stem (2) is disposed through the top of the valve body (1), the butterfly plate (3) is rotatably connected to the inside of the valve body (1), a protrusion is integrally formed on the front side of the butterfly plate (3), one end of the valve stem (2) extends into the inside of the protrusion, the valve seat (4) is installed on the inner peripheral wall of the valve body (1), and the butterfly plate (3) is in contact with the valve seat (4); At least one of the horizontal pins (5) extends laterally through the interior of the protrusion and fits against the outer peripheral surface of the valve stem (2), with the side of the valve stem (2) facing the horizontal pin (5) being planar; A locking structure (6) that engages with the cross pin (5) is provided on the left side of the protrusion.

2. The transverse oblique cut pin structure according to claim 1, characterized in that: The horizontal pin (5) is inclined on the side facing the valve stem (2) and fits against the plane of the valve stem (2).

3. The transverse oblique cut pin structure according to claim 2, characterized in that: The cross-sectional shape of the side of the horizontal pin (5) is rectangular.

4. The transverse oblique cut pin structure according to claim 3, characterized in that: The protrusion has a vertically formed mating hole for inserting the valve stem, and the protrusion has at least one horizontally formed limiting hole for inserting at least one horizontal pin (5).

5. The transverse oblique cut pin structure according to claim 4, characterized in that: The limiting hole and the docking hole are in communication.

6. The transverse oblique cut pin structure according to claim 1, characterized in that: The locking structure (6) includes a connecting hole longitudinally opened inside the horizontal pin (5), and a limiting block (601) is inserted inside the connecting hole. The top cross-section of the connecting hole and the limiting block (601) are both trapezoidal, and the connecting hole and the two inclined surfaces of the limiting block are in contact.

7. A transverse oblique-cut pin structure according to claim 6, characterized in that: A mounting base (602) is provided on the left side of the protrusion and on the front side of the horizontal pin (5). The front part of the mounting base is welded to the front side of the protrusion. A bolt (603) is threadedly connected to the front side of the mounting base (602). One end of the bolt (603) is rotatably connected to the limiting block (601).

8. The transverse oblique cut pin structure according to claim 7, characterized in that: The mounting base (602) has a square opening on its rear side for the limiting block (601) to pass through.

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