CN217874204U - Stop valve prevents excessive structure of screwing up - Google Patents
Stop valve prevents excessive structure of screwing up Download PDFInfo
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- CN217874204U CN217874204U CN202222386677.6U CN202222386677U CN217874204U CN 217874204 U CN217874204 U CN 217874204U CN 202222386677 U CN202222386677 U CN 202222386677U CN 217874204 U CN217874204 U CN 217874204U
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Abstract
The utility model discloses a stop valve structure for preventing over-tightening, which comprises a valve body, a slide valve, a valve rod, a plug screw and a hand wheel, wherein the slide valve is connected with the valve body in a threaded fit way, one end of the valve rod is connected with the hand wheel, and the other end of the valve rod passes through the plug screw and then extends into the valve body and is connected with the slide valve, and the hand wheel can drive the valve rod to rotate and drive the slide valve to rotate; the middle part of the screw plug is provided with a limiting ring, and the limiting ring is tightly attached to the valve body; the other end of the screw plug is connected with a limit nut in a threaded fit manner, and the outer wall of the limit nut is distributed with a plurality of limit grooves around the circumference; the inner wall of the hand wheel is provided with a boss matched with the limiting groove at a position corresponding to the limiting groove, the boss extends into the limiting groove, and the hand wheel can drive the limiting nut to rotate through the boss. The utility model discloses only increase a stop nut on the basis of structure is screwed up to the tradition, just can prevent that the condition of excessively screwing up from taking place, the life of extension stop valve, simple structure, simple to operate.
Description
Technical Field
The utility model relates to a stop valve and relevant valve member technical field, concretely relates to stop valve prevents excessive structure of screwing up.
Background
Shut-off valves in valve type products are components that control the connection and disconnection of fluid media in a piping system. The stop valve is a valve which is widely used, has small friction force between sealing surfaces in the opening and closing process, is relatively durable, has small opening height, is easy to manufacture and convenient to maintain, is suitable for medium and low pressure and high pressure, and belongs to a forced sealing type valve. Therefore, when the valve is closed, the stop valve must apply pressure to the sealing surface to make the sealing surface and the valve port tightly attached to each other so as to force the sealing surface not to generate leakage, and the sealing performance of the stop valve directly influences the safe and reliable operation of equipment.
The sealing surface materials are divided into a soft sealing material and a hard sealing material, and particularly, the sealing surface can be permanently deformed along with the difference of the magnitude of each tightening torque in the use process of the soft sealing material, particularly when an overlarge tightening torque is used. The deformation is gradually increased along with the accumulation of the service time, and when the deformation is accumulated to a certain degree, the sealing failure can be caused, so that the function of the whole set of products is influenced. In order to prevent the sealing surface from generating excessive deformation when the stop valve is closed at every time, a novel structure is designed, and when the tightening torque is excessive, the deformation generated when the sealing surface of the stop valve is closed is consistent with that generated when the normal tightening torque is generated, which is very necessary.
SUMMERY OF THE UTILITY MODEL
Not enough to the above-mentioned that prior art exists, the utility model aims to provide a stop valve prevents excessively to screw up the structure, solves to screw up the problem that moment is too big, the valve seal face is too big to be out of shape.
In order to solve the technical problem, the utility model discloses a technical scheme is such:
a stop valve structure for preventing over-tightening comprises a valve body, a slide valve, a valve rod, a screw plug and a hand wheel, wherein the valve body is provided with a liquid inlet channel, a valve cavity and a liquid outlet channel; the slide valve is connected with the valve body in a threaded fit manner, one end of the slide valve extends into the valve cavity and is opposite to the valve hole, and the slide valve can be rotated to seal the valve hole; the screw plug is connected with the valve body in a threaded fit manner, and an accommodating groove for the slide valve to enter is formed in the position, corresponding to the slide valve, of one end, connected with the valve body, of the screw plug; one end of the valve rod is connected with a hand wheel, the other end of the valve rod penetrates through the plug screw and then extends into the valve body, and is connected with the slide valve, and the hand wheel can drive the valve rod to rotate and drive the slide valve to rotate; the valve is characterized in that the middle part of the screw plug is provided with a limiting ring, and the limiting ring is tightly attached to the valve body; the other end of the screw plug is connected with a limit nut in a threaded fit manner, and the outer wall of the limit nut is distributed with a plurality of limit grooves around the circumference; the inner wall of the hand wheel is provided with a boss matched with the limiting groove at a position corresponding to the limiting groove, the boss extends into the limiting groove, and the hand wheel can drive the limiting nut to rotate through the boss.
Furthermore, the section of one end of the valve rod, which is connected with the slide valve, is rectangular, a rectangular groove corresponding to the valve rod is arranged at one end of the slide valve, which is close to the valve rod, the rectangular end of the valve rod extends into the rectangular groove, and in the moving process of the slide valve, the rectangular end of the valve rod is always positioned in the rectangular groove.
Furthermore, the section of one end of the valve rod connected with the hand wheel is also rectangular, a rectangular hole corresponding to the valve rod is formed in the hand wheel, and one end of the valve rod connected with the hand wheel penetrates through the rectangular hole.
Furthermore, a groove is formed in one side, away from the valve body, of the hand wheel and corresponds to the position of the valve cover, the valve rod extends into the groove, a section, located in the groove, of the valve rod is columnar and provided with external threads, a locking nut is connected to the section of the valve rod in a threaded fit mode, a spring is further arranged between the locking nut and the bottom of the groove, and the spring is sleeved on the valve rod; the valve rod is provided with a positioning ring at the part positioned in the accommodating groove of the screw plug, and the positioning ring is tightly attached to the bottom of the accommodating groove of the screw plug under the action of a spring, so that the valve rod is fixed.
Furthermore, the number of the limiting grooves and the number of the bosses are at least two.
Furthermore, a first sealing ring is arranged between the valve body and the plug screw.
Further, a second sealing ring is arranged between the screw plug and the valve rod.
Furthermore, a retainer ring is arranged between the positioning ring and the bottom of the accommodating groove of the screw plug.
Further, a gasket is arranged between the retainer ring and the positioning ring.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses a stop valve prevents excessively tightening structure, only increases a stop nut on the basis of structure is screwed up to the tradition, does not increase and screws up the whole overall dimension of structure, just can prevent that the sealed face of slide valve from being compressed tightly by unrestricted production permanent deformation to promote the life and the reliability of product, simple structure, dependable performance, installation convenient to use.
Drawings
FIG. 1 is a schematic view of the stop valve of the present invention;
FIG. 2 is a schematic structural view of the stop nut of the present invention;
fig. 3 is a schematic view of the hand wheel structure of the present invention.
In the figure, a valve body 1, a slide valve 2, a valve rod 3, a plug screw 4, a hand wheel 5, a liquid inlet channel 6, a liquid outlet channel 7, a valve hole 8, a limiting ring 9, a limiting nut 10, a limiting groove 11, a boss 12, a locking nut 13, a spring 14, a positioning ring 15, a first sealing ring 16, a second sealing ring 17, a check ring 18 and a gasket 19.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described with reference to the following specific examples, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1-3, the structure for preventing the stop valve from being over-screwed comprises a valve body 1, a slide valve 2, a valve rod 3, a screw plug 4 and a hand wheel 5.
The valve body 1 is provided with a liquid inlet channel 6, a valve cavity and a liquid outlet channel 7, wherein the liquid inlet channel 6 is communicated with the valve cavity, and the liquid outlet channel 7 is communicated with the valve cavity through a valve hole 8.
The slide valve 2 is connected with the valve body 1 in a threaded fit mode, one end of the slide valve 2 extends into the valve cavity and is opposite to the valve hole 8, and the slide valve 2 can be rotated to enable the slide valve 2 to close the valve hole 8.
The screw plug 4 is connected with the valve body 1 in a thread matching way, and an accommodating groove for the slide valve 2 to enter is formed in the position, corresponding to the slide valve 2, of one end, connected with the valve body 1, of the screw plug 4. A first sealing ring 16 is arranged between the valve body 1 and the screw plug 4.
One end of the valve rod 3 is connected with the hand wheel 5, the other end of the valve rod 3 penetrates through the plug screw 4 and then extends into the valve body 1 and is connected with the slide valve 2, the valve rod 3 can be driven to rotate through the hand wheel 5, and the slide valve 2 is driven to rotate.
The section of one end of the valve rod 3 connected with the slide valve 2 is rectangular, a rectangular groove corresponding to the valve rod 3 is formed in one end, close to the valve rod 3, of the slide valve 2, the rectangular end of the valve rod 3 extends into the rectangular groove, and in the moving process of the slide valve 2, the rectangular end of the valve rod 3 is located in the rectangular groove all the time. The cross section of one end of the valve rod 3 connected with the hand wheel 5 is also rectangular, a rectangular hole corresponding to the hand wheel 5 is formed in the hand wheel 5, and one end of the valve rod 3 connected with the hand wheel 5 penetrates through the rectangular hole. The end connected with the valve rod 3 and the slide valve 2 and the end connected with the hand wheel 5 of the valve rod 3 are respectively set to be rectangular, so that the transmission connection between the valve rod and the hand wheel is convenient to realize.
Wherein, a second sealing ring 17 is arranged between the screw plug 4 and the valve rod 3.
A groove is formed in one side, away from the valve body 1, of the hand wheel 5, the position corresponding to the valve cover is provided with a groove, the valve rod 3 extends into the groove, a section, located in the groove, of the valve rod 3 is columnar and provided with external threads, a locking nut 13 is connected to the section of the valve rod 3 in a threaded fit mode, a spring 14 is further arranged between the locking nut 13 and the bottom of the groove, and the spring 14 is sleeved on the valve rod 3; the valve rod 3 is provided with a positioning ring 15 at the part thereof located in the accommodating groove of the screw plug 4, and the positioning ring 15 is tightly attached to the bottom of the accommodating groove of the screw plug 4 under the action of the spring 14, so that the valve rod 3 is fixed. The structure arrangement can realize the fixation of the valve rod 3 and can also carry out the tightness adjustment of the compression nut 13 according to the actual situation.
Wherein, a retainer ring 18 is arranged between the positioning ring 15 and the bottom of the accommodating groove of the screw plug 4. A gasket 19 is also provided between the retainer ring 18 and the retaining ring 15. This enhances the stability of the valve stem 3 and reduces wear on the valve stem 3 and the plug screw 4.
The middle part of the screw plug 4 is provided with a limit ring 9, and the limit ring 9 is tightly attached to the valve body 1. The other end of the screw plug 4 is connected with a limit nut 10 in a threaded fit manner, and a plurality of limit grooves 11 are distributed on the outer wall of the limit nut 10 around the circumference of the limit nut; the inner wall of the hand wheel 5 is provided with a boss 12 matched with the limiting groove 11 at a position corresponding to the limiting groove 11, the boss 12 extends into the limiting groove 11, and the hand wheel 5 can drive the limiting nut 10 to rotate through the boss 12. The number of the limiting grooves 11 and the number of the bosses 12 are at least two, so that the stability between the limiting nut 10 and the hand wheel 5 is enhanced.
During implementation, a boss 12 of the hand wheel 5 is matched with a limiting groove 11 in the outer wall of the limiting nut 10, the hand wheel 5 is rotated, the hand wheel 5 drives the limiting nut 10 and the valve rod 3 to rotate, the valve rod 3 drives the sliding valve 2 to rotate, the rotation of the sliding valve 2 is converted into the front and back linear movement of the sliding valve 2 through mutually matched threads, and the sealing surface of the sliding valve 2 and the valve hole 8 of the valve body 1 are closed and opened. When the valve hole 8 is sealed by the sealing surface of the slide valve 2, the limiting nut 10 also moves to be attached to the limiting ring 9 of the plug screw 4, and at the moment, the limiting nut 10 cannot move continuously, so that the hand wheel 5 is prevented from further rotating (a small amount of rotation is generated by the deformation of the limiting nut 10 and can be ignored); therefore, the effect that the excessive hand wheel 5 tightening torque basically has no influence on the deformation of the sealing surface of the slide valve 2 is achieved, and the service life and the reliability of the stop valve are improved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that those modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all should be covered in the scope of the claims of the present invention.
Claims (9)
1. A stop valve structure for preventing over-tightening comprises a valve body, a slide valve, a valve rod, a screw plug and a hand wheel, wherein the valve body is provided with a liquid inlet channel, a valve cavity and a liquid outlet channel; the slide valve is connected with the valve body in a threaded fit manner, one end of the slide valve extends into the valve cavity and is opposite to the valve hole, and the slide valve can be rotated to seal the valve hole; the screw plug is connected with the valve body in a threaded fit manner, and an accommodating groove for the slide valve to enter is formed in the position, corresponding to the slide valve, of one end, connected with the valve body, of the screw plug; one end of the valve rod is connected with the hand wheel, the other end of the valve rod penetrates through the plug screw and then extends into the valve body, and is connected with the slide valve, and the hand wheel can drive the valve rod to rotate and drive the slide valve to rotate; the valve is characterized in that the middle part of the plug screw is provided with a limit ring, and the limit ring is tightly attached to the valve body; the other end of the screw plug is connected with a limit nut in a threaded fit manner, and a plurality of limit grooves are distributed on the outer wall of the limit nut around the circumference of the limit nut; the inner wall of the hand wheel is provided with a boss matched with the limiting groove at a position corresponding to the limiting groove, the boss extends into the limiting groove, and the hand wheel can drive the limiting nut to rotate through the boss.
2. A stop valve structure according to claim 1, wherein the end of the valve rod connected to the spool has a rectangular cross-section, a rectangular groove corresponding to the valve rod is formed in the end of the spool adjacent to the valve rod, the rectangular end of the valve rod extends into the rectangular groove, and the rectangular end of the valve rod is located in the rectangular groove during the movement of the spool.
3. The stop valve structure of claim 1, wherein the cross section of the end of the valve rod connected with the hand wheel is also rectangular, a corresponding rectangular hole is arranged on the hand wheel, and the end of the valve rod connected with the hand wheel passes through the rectangular hole.
4. The stop valve overtightening preventing structure according to claim 1, wherein a groove is formed in a side of the hand wheel facing away from the valve body, corresponding to the position of the valve cover, and the valve rod extends into the groove, wherein a section of the valve rod located in the groove is columnar and provided with external threads, a lock nut is connected to the section of the valve rod in a threaded fit manner, a spring is further arranged between the lock nut and the bottom of the groove, and the spring is sleeved on the valve rod; the valve rod is provided with a positioning ring at the part positioned in the accommodating groove of the screw plug, and the positioning ring is tightly attached to the bottom of the accommodating groove of the screw plug under the action of a spring, so that the valve rod is fixed.
5. The cut-off valve over-tightening prevention structure according to claim 1, wherein the number of the limiting grooves and the bosses is at least two.
6. The cut-off valve over-tightening prevention structure according to claim 1, wherein a first seal ring is provided between the valve body and the plug screw.
7. The shut-off valve over-tightening prevention structure according to claim 1, wherein a second seal ring is provided between the plug screw and the stem.
8. The stop valve over-tightening prevention structure according to claim 4, wherein a retainer ring is provided between the positioning ring and the bottom of the groove bottom of the plug screw.
9. The shut-off valve over-tightening prevention structure according to claim 8, wherein a gasket is further provided between the retainer ring and the positioning ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222386677.6U CN217874204U (en) | 2022-09-08 | 2022-09-08 | Stop valve prevents excessive structure of screwing up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222386677.6U CN217874204U (en) | 2022-09-08 | 2022-09-08 | Stop valve prevents excessive structure of screwing up |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217874204U true CN217874204U (en) | 2022-11-22 |
Family
ID=84082132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222386677.6U Active CN217874204U (en) | 2022-09-08 | 2022-09-08 | Stop valve prevents excessive structure of screwing up |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217874204U (en) |
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2022
- 2022-09-08 CN CN202222386677.6U patent/CN217874204U/en active Active
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