CN202431991U - Spline connection mechanism for center line butterfly valve - Google Patents
Spline connection mechanism for center line butterfly valve Download PDFInfo
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- CN202431991U CN202431991U CN2012200246084U CN201220024608U CN202431991U CN 202431991 U CN202431991 U CN 202431991U CN 2012200246084 U CN2012200246084 U CN 2012200246084U CN 201220024608 U CN201220024608 U CN 201220024608U CN 202431991 U CN202431991 U CN 202431991U
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Abstract
The utility model relates to a spline connection mechanism for a center line butterfly valve. The spline connection mechanism comprises a valve shaft (1), a valve body (2), a valve seat (3) and a valve plate (4). A valve plate shaft hole (400) is arranged at the center position of the valve plate (4), the valve shaft (1) penetrates through round through holes arranged at the center of the valve body (2) and the valve seat (3) to be fixed in the valve plate through hole (400), the valve plate shaft hole (400) is a light hole, splines (103) are arranged in the shaft section matched with the valve plate shaft hole (400) on the valve shaft (1) in the circumferential direction, and the splines (103) on the valve shaft (1) are in interference fit with the valve plate shaft hole (400) to form zero clearance fixing connection. Butterflies with the spline structure are high in valve shaft bending proof capability, high in pressure bearing capability, simple in structure and low in production cost. The valve plate is not prone to leakage.
Description
Technical field
The utility model belongs to the butterfly valve technical field, is specifically related to a kind of centre-pivoted butterfly valve and uses splined mechanism.
Background technique
At present, having that the valve plate of centre-pivoted butterfly valve connects with valve shaft employing " modulus spline " structural type on the market is a lot, but the connection fit form that their adopt is commonly the Spielpassung of standard, and is mainly used in large bore valves.The advantage of this fit form is: 1) interchangeability of valve plate and valve shaft is good, and assembling is simple; 2) compare with the mode that the Traditional use taper pin connects, safe and reliable, be easy to dismantle separately valve shaft.Shortcoming is: 1) compare with traditional taper pin connecting mode, the cost of production of splined mode is high; What 2) adopt " modulus spline " structural type in small dimension (DN25-DN300) centre-pivoted butterfly valve generally all is that a joint formula valve shaft connects; Because structure is limit; The lower end diameter of axle of valve shaft is less than the upper end diameter of axle, thus reduced the bending resistance of valve shaft comparatively speaking, usually under the prerequisite that guarantees product safety; In order to reduce cost, most MANUFACTURERs that produce centre-pivoted butterfly valve do not adopt this structure; 3) in small dimension (DN25-DN300) centre-pivoted butterfly valve, adopt the valve shaft of modulus spline structure, its easily detachable characteristics are not brought into play at all; Reason is, centre-pivoted butterfly valve is a kind of low value-added product, and its easily damaged parts is valve seat and valve plate; On-the-spot if change valve seat or valve plate, the maintenance cost of dismounting and cleaning is very high, to the centre-pivoted butterfly valve in the small dimension scope; Keep in repair an old valve not as changing a new valve, so the user in actual use, when finding that leakage needs to change valve seat or valve plate; All be to adopt the complete machine substitute mode; Particularly these several years, along with the rising of labor cost, the reduction of valve complete machine cost, the phenomenon of field replacement valve seat or valve plate just still less.
The model utility content
To the defective that exists in the existing technology, the purpose of the utility model provides a kind of centre-pivoted butterfly valve simple in structure, that the valve shaft bending resistance is strong and cost of production is low and uses splined mechanism.
For reaching above purpose; The technological scheme that the utility model adopts is: a kind of centre-pivoted butterfly valve comprises valve shaft, valve body, valve seat and valve plate with splined mechanism; The center of valve plate is provided with the valve plate axis hole, and valve shaft passes the manhole that is located at valve body, centre place and is fixed in the valve plate axis hole, and the valve plate axis hole is a unthreaded hole; Along being circumferentially with spline, spline and valve plate axis hole form no gap through interference fit and are fixedly connected in the shaft part that matches with the valve plate axis hole on the valve shaft.
Further, the external diameter that is located at the valve shaft upper spline is greater than its place shaft part external diameter 0.3-0.4mm, and spline and valve plate axis hole are that the interference fit of 0.3-0.4mm connects.
Further, to be provided with the shaft part length of spline be 1.5 times of valve shaft diameter to valve shaft.
Further, said spline is an involute splines, and modulus is 0.5-1.5.
Perhaps, said spline is a serration spline, and modulus is 0.5-1.5, and the pressure angle of serration spline is 45 °.
Further, valve shaft is the two-segment type valve shaft, is divided into valve shaft and lower valve shaft, and spline is located at the bottom of valve shaft.
Further, the valve plate axis hole is a through-hole structure, and the spline and the valve plate axis hole that are located at the valve shaft bottom connect through interference fit; The end that lower valve shaft matches with the valve plate axis hole is the circular shaft structure, is that dismountable circular hole connects with the circular shaft Spielpassung between them.
Perhaps, the valve plate axis hole is two sections blind hole structures, is divided into valve plate upper shaft hole and valve plate lower shaft hole, and the spline and the valve plate upper shaft hole that are located at the valve shaft bottom connect through interference fit; The end that lower valve shaft matches with the valve plate lower shaft hole is the circular shaft structure, is that dismountable circular hole connects with the circular shaft Spielpassung between them.
Further, valve shaft is a joint formula valve shaft, and the valve plate axis hole is a through-hole structure; An end that matches with the valve plate axis hole in the bottom of valve shaft is the circular shaft structure, is that dismountable circular hole connects with the circular shaft Spielpassung between them.
The beneficial effect of the utility model is:
1, the modulus spline structure of traditional sense connects, and is that the splined shaft with modulus connects through Spielpassung with spline housing, and after valve plate was closed pressurized, degree of lifting height caused moment of torsion big, was prone to leakage.The utility model has changed this traditional standard matching model, makes " little modulus spline " shaft part that warp quenches on the valve shaft and does not pass through heat treated unthreaded hole interference fit, is pressed into butterfly plate axis hole (forming spline housing naturally) through external force; Make valve shaft and valve plate form no gap and be fixedly connected, so the valve plate bearing capacity is high; The actual effectively bending resistant section of valve shaft long-pending with compare all greatlyyer with diameter of axle valve, after valve plate was closed pressurized, degree of lifting was low; Open and close torque is little, is difficult for revealing.
2, in the utility model, because valve plate and valve shaft assembling back form an integral body, so can remove the axial anti-channeling dynamic positioning system of valve shaft (as far as there not being pin attachment valve panel assembly) from.
3, with on the market do not have the centre-pivoted butterfly valve that pin connects and compare; This splined structure that the utility model provides; Its cost of production is low, be fit to produce in enormous quantities, this be because valve plate to be processed into unthreaded hole more than being processed into irregularly-shaped hole and being easy to; And have gear rolling machine efficiently can carry out the shaping operation of little modulus splined shaft in China, work efficiency is very high.As: process a splined shaft profile of tooth that external diameter is φ 16, modulus 0.5mm, only need 2-3 second, and the profile of tooth of processing rule, error is little, so compare with processing profiled axle, cost is much lower, is fit to very much produce in enormous quantities.
Description of drawings
Fig. 1 is the structural representation of butterfly valve that adopts the splined mechanism that provides of the utility model;
Fig. 2 is that A-A is to sectional view among Fig. 1, and wherein butterfly valve adopts two-segment type valve shaft, passing hole type valve plate;
Fig. 3 is that A-A is to sectional view among Fig. 1, and wherein butterfly valve adopts a joint formula valve shaft, passing hole type valve plate;
Fig. 4 is that A-A is to sectional view among Fig. 1, and wherein butterfly valve adopts two-segment type valve shaft, blind-hole type valve plate;
The joint formula valve shaft structural representation that Fig. 5 adopts for the utility model;
Fig. 6 is the last valve shaft structural representation of the two-segment type valve shaft of the utility model employing;
Fig. 7 is the cross section enlarged view of spline among Fig. 5, Fig. 6.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
As shown in Figure 1; The centre-pivoted butterfly valve that the utility model provided is used splined mechanism; Comprise valve shaft 1, valve body 2, valve seat 3 and valve plate 4, the center of valve plate 4 is provided with valve plate axis hole 400, and valve shaft 1 passes the manhole that is located at valve body 2, valve seat 3 centers and is fixed in the valve plate axis hole 400.In the utility model, valve plate axis hole 400 is a unthreaded hole, and along being circumferentially with spline 103, spline 103 forms no gap with valve plate axis hole 400 through interference fit and is fixedly connected in the shaft part that matches with valve plate axis hole 400 on the valve shaft 1.Below specify the centre-pivoted butterfly valve that the utility model was provided with specific embodiment and use splined mechanism.
Fig. 2 has shown a kind of mode of execution of the utility model, and in this embodiment, butterfly valve adopts two-segment type valve shaft and passing hole type valve plate.As shown in Figure 2, valve shaft 1 is for being divided into valve shaft 101 and lower valve shaft 102, and spline 103 is located at the bottom of valve shaft 101, and the external diameter of spline 103 is greater than its place shaft part external diameter 0.3-0.4mm; Valve body 2 tops are provided with valve body upper shaft hole 201, and the bottom is provided with valve body lower shaft hole 202, and the inner chamber periphery is encircled with valve seat 3, and valve plate 4 is arranged in the inner chamber 303 of valve seat 3, and the upper and lower part of valve seat 3 is provided with valve seat upper shaft hole 301 and valve seat lower shaft hole 302 respectively.In the present embodiment, last valve shaft 101 is pressed into the epimere of valve plate axis hole 400 through valve body upper shaft hole 201, valve seat upper shaft hole 301, and spline 103 and the valve plate axis hole 400 that are located on the valve shaft 101 connect through interference fit; Lower valve shaft 102 is pressed into the bottom of valve plate axis hole 400 through valve body lower shaft hole 202, valve seat lower shaft hole 302, thereby fixes valve plate 4 by last valve shaft 101 with lower valve shaft 102, and wherein going up valve shaft 101 is live axle, and lower valve shaft 102 is a stationary axle.
Fig. 3 has shown the another kind of mode of execution of the utility model, and in this embodiment, butterfly valve adopts a joint formula valve shaft and a passing hole type valve plate.In the present embodiment; Valve shaft 1 is pressed into the epimere of valve plate axis hole 400 through valve body upper shaft hole 201, valve seat upper shaft hole 301; Spline 103 can be located at the arbitrary position of valve shaft 1; And the external diameter of spline 103 is greater than its place shaft part external diameter 0.3-0.4mm, and spline 103 and valve plate axis hole 400 connect through interference fit.
Fig. 4 has shown the third mode of execution of the utility model, and in this embodiment, butterfly valve adopts two-segment type valve shaft and blind-hole type valve plate.What present embodiment was different with the described mode of execution of Fig. 2 is, the valve plate axis hole is divided into valve plate upper shaft hole 401 and valve plate lower shaft hole 402, and spline 103 and the valve plate upper shaft hole 401 that are located on the valve shaft 101 connect through interference fit.
Shown in Fig. 5-7; The end that end that valve shaft 1 matches with valve plate axis hole 400 among the embodiment or last valve shaft 101 match with valve plate upper shaft hole 401 is " little modulus spline " structure; The profile of tooth of spline 103 is a serration spline, and modulus is 0.5-1.5, and the pressure angle of serration spline is 45 °.The profile of tooth of spline 103 also can be involute splines, and modulus is 0.5-1.5.
In the embodiment of the utility model, valve shaft 1 and valve plate axis hole 400 are perhaps gone up be fixedly connected (need use special tool during dismounting) for can not arbitrarily dismantling between valve shaft 101 and the valve plate upper shaft hole 401.With mode of execution shown in Figure 2 is that example describes; Valve plate axis hole 400 is without heat treated unthreaded hole, when valve shaft 1 is installed, at first makes spline structure behind heat-treatment quenching, develop into spline push broach; Through external force spline structure is pressed in the valve plate axis hole 400 then; Make spline 103 form seamless being fixedly connected through interference fit, thereby make 4 one-tenth of valve shaft 1 and butterfly plates as a whole, utilize valve shaft 1 to drive valve plate 4 and open and close rotation with valve plate axis hole 400.
Under the preferable case, spline 103 is the interference fit of 0.3-0.4mm with valve plate axis hole 400.
More preferably under the situation, the shaft part length that valve shaft 1 is provided with spline 103 is 1.5 times of valve shaft 1 diameter.
In addition, in the utility model, the end that an end that matches with valve plate axis hole 400 in the bottom of valve shaft 1 or lower valve shaft 102 match with valve plate lower shaft hole 402 is the circular shaft structure, is that dismountable circular hole connects with the circular shaft Spielpassung between them.
The said structure of the utility model is not limited to the embodiment described in the embodiment, and those skilled in the art draw other mode of execution according to the technological scheme of the utility model, belongs to the technological innovation scope of the utility model equally.
Claims (9)
1. a centre-pivoted butterfly valve is used splined mechanism; Comprise valve shaft (1), valve body (2), valve seat (3) and valve plate (4); The center of valve plate (4) is provided with valve plate axis hole (400); Valve shaft (1) passes the manhole that is located at valve body (2), valve seat (3) center and is fixed in the valve plate axis hole (400), it is characterized in that valve plate axis hole (400) is a unthreaded hole; Along being circumferentially with spline (103), spline (103) forms no gap with valve plate axis hole (400) through interference fit and is fixedly connected in the shaft part that valve shaft (1) is gone up with valve plate axis hole (400) matches.
2. a kind of centre-pivoted butterfly valve according to claim 1 is used splined mechanism; It is characterized in that; The external diameter that is located at valve shaft (1) upper spline (103) is greater than its place shaft part external diameter 0.3-0.4mm, and spline (103) connects for the interference fit of 0.3-0.4mm with valve plate axis hole (400).
3. a kind of centre-pivoted butterfly valve according to claim 1 and 2 is used splined mechanism, it is characterized in that, the shaft part length that valve shaft (1) is provided with spline (103) is 1.5 times of valve shaft (1) diameter.
4. a kind of centre-pivoted butterfly valve according to claim 3 is used splined mechanism, it is characterized in that, said spline (103) is an involute splines, and modulus is 0.5-1.5.
5. a kind of centre-pivoted butterfly valve according to claim 3 is used splined mechanism, it is characterized in that, said spline (103) is a serration spline, and modulus is 0.5-1.5, and the pressure angle of serration spline is 45 °.
6. a kind of centre-pivoted butterfly valve according to claim 1 and 2 is used splined mechanism, it is characterized in that, valve shaft (1) is the two-segment type valve shaft, is divided into valve shaft (101) and lower valve shaft (102), and spline (103) is located at the bottom of valve shaft (1).
7. a kind of centre-pivoted butterfly valve according to claim 6 is used splined mechanism, it is characterized in that, valve plate axis hole (400) is a through-hole structure, and the spline (103) and the valve plate axis hole (400) that are located at valve shaft (101) bottom connect through interference fit; Lower valve shaft (102) is the circular shaft structure with the end that valve plate axis hole (400) matches, and is that dismountable circular hole connects with the circular shaft Spielpassung between them.
8. a kind of centre-pivoted butterfly valve according to claim 6 is used splined mechanism; It is characterized in that; Valve plate axis hole (400) is two sections blind hole structures; Be divided into valve plate upper shaft hole (401) and valve plate lower shaft hole (402), the spline (103) and the valve plate upper shaft hole (401) that are located at valve shaft (101) bottom connect through interference fit; Lower valve shaft (102) is the circular shaft structure with the end that valve plate lower shaft hole (402) matches, and is that dismountable circular hole connects with the circular shaft Spielpassung between them.
9. a kind of centre-pivoted butterfly valve according to claim 1 and 2 is used splined mechanism, it is characterized in that, valve shaft (1) is a joint formula valve shaft, and valve plate axis hole (400) is a through-hole structure; The bottom of valve shaft (1) is the circular shaft structure with the end that valve plate axis hole (400) matches, and is that dismountable circular hole connects with the circular shaft Spielpassung between them.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200246084U CN202431991U (en) | 2012-01-18 | 2012-01-18 | Spline connection mechanism for center line butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200246084U CN202431991U (en) | 2012-01-18 | 2012-01-18 | Spline connection mechanism for center line butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202431991U true CN202431991U (en) | 2012-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200246084U Expired - Fee Related CN202431991U (en) | 2012-01-18 | 2012-01-18 | Spline connection mechanism for center line butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202431991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537387A (en) * | 2012-01-18 | 2012-07-04 | 北京山尔管道控制元件有限公司 | Spline coupling mechanism for center-line butterfly valve |
-
2012
- 2012-01-18 CN CN2012200246084U patent/CN202431991U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537387A (en) * | 2012-01-18 | 2012-07-04 | 北京山尔管道控制元件有限公司 | Spline coupling mechanism for center-line butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20180118 |