CN210461759U - Ball valve with oil injection nozzle - Google Patents
Ball valve with oil injection nozzle Download PDFInfo
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- CN210461759U CN210461759U CN201920792186.7U CN201920792186U CN210461759U CN 210461759 U CN210461759 U CN 210461759U CN 201920792186 U CN201920792186 U CN 201920792186U CN 210461759 U CN210461759 U CN 210461759U
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Abstract
The utility model discloses a ball valve that has oiling mouth relates to valve lubrication structure's improvement. The utility model discloses an oiling mouth that sets up on the valve body, oiling mouth is used for filling emollient in a closed cavity of valve intracavity through lining up the inside and outside oil filler point of valve body, and closed cavity's wall is connected with the sealed pair that comprises the case outside and disk seat inboard respectively to it is right that emollient is along closed cavity's wall sealed pair is lubricated. The utility model provides a can keep lubricated sealed valve mechanism for a long time, solve the problem that the vice leakproofness of valve long-term operation back ball valve internal seal becomes poor, especially prolonged a flow control ball valve's life.
Description
Technical Field
The utility model belongs to the technical field of the valve design, in particular to valve lubricating structure's improvement.
Background
The ball valve is a valve which takes a ball body as an opening and closing piece and drives a valve core by a valve rod to enable the valve core to rotate around the axis of the valve rod. This spheroid is also called the valve ball, be equipped with the through-hole in the spheroid as the runner, the through-hole is the ball mouth at the opening on spheroid surface, the spheroid both sides have closely laminated the disk seat, the disk seat also is equipped with the through-hole and the seal port that corresponds with the ball mouth, the sphere cooperation forms sealed sphere between spheroid and the disk seat, ball valve both sides switch on when ball mouth intersects with the seal port, the medium can get into the other end from the one end of ball valve through the runner, when ball mouth and seal port non-intersect, the ball valve both sides do not switch on, the medium of both sides is cut off.
In the prior art, due to structural reasons, the ball valve only adds lubricant between the valve ball and the valve seat in the production process to form a lubricating layer, and the joint surface of the valve ball and the valve seat cannot be supplemented with lubricant after production and molding, so that the problems of poor sealing performance and short service life of the ball valve are caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can keep lubricated sealed valve mechanism for a long time, solve the problem that the leakproofness worsens after the valve long-term operation.
The utility model provides a technical scheme is: the utility model provides a ball valve that has oiling mouth, includes the oiling mouth that sets up on the valve body, the oiling mouth is used for annotating emollient to the valve intracavity through link up the inside and outside oil filler point of valve body.
In one embodiment of the above technical scheme, a valve ball and a valve seat wrapping the valve ball from two sides are arranged in the valve cavity, the outer wall of the valve seat is tightly jointed with the inner wall of the valve body, a first gap surrounding the valve ball is arranged between the valve seats, and the oil injection hole is communicated with the first gap.
In one embodiment of the above technical solution, the valve body includes a middle tube and a side tube sleeved in the middle tube; the outer wall of the valve seat and the inner wall of the middle pipe form a cylindrical surface sealing structure so as to prevent the first gap from being communicated with the cavity between the side pipe and the middle pipe.
In an embodiment of the above technical solution, a sealing ring is arranged between the outer wall of the valve seat and the inner wall of the middle pipe.
In one embodiment of the above technical solution, a disc spring is arranged between the valve seat and the side tube, and the disc spring is provided with a pretightening force for pressing the valve seat to the valve ball; the valve seat slides along the inner wall of the valve body towards the valve ball direction after being worn under the action of the disc spring so as to reduce the first gap.
In one embodiment of the above solution, the ball valve comprises a valve stem; the valve seat is provided with a top hole, and the valve rod penetrates through the top hole and is connected with the valve ball; the first gap is communicated with the top hole.
In an embodiment of the above technical solution, the ball valve includes a valve rod sleeve disposed on the valve body, the valve rod sleeve and the valve rod have a second gap, and the first gap is communicated with the second gap through the top hole.
In an embodiment of the above technical solution, the first gap has an S-shaped cross section.
In one embodiment of the above solution, the first clearance is located in the plane of a great circle of the ball. The great circle is the excircle of a circular cross section through valve ball centre of sphere promptly, can divide into two parts with the valve ball, when setting up first gap along the great circle, the valve ball uses the straight line of great circle coplanar to be the axle when rotatory 180 degrees, and the whole sphere that covers the valve ball can be paintd to the lubricating oil in first gap. Since the axis of the stem connecting the ball may not be orthogonal to the flow path direction, the plane in which the great circle is located may not be orthogonal to the left direction. Preferably, the specific embodiment of the present application mainly provides a description that the great circle of the first slit in the same plane is orthogonal to the staying direction.
As a further improvement of the technical schemes, the oil filling nozzle is detachably connected with the valve body.
The utility model discloses an aspect beneficial effect who brings is: the oil filling nozzle is arranged on the valve body so as to continuously provide lubricant for the valve seat and the valve ball in the valve cavity, so that a corresponding lubricating layer is continuously provided, and the service life of the ball valve is prolonged.
The utility model discloses an aspect beneficial effect who brings is: the first gap between the valve seats around the valve ball provides an oil filling cavity, after oil is filled through the oil filling nozzle, lubricating oil is filled in the oil filling cavity, so that the valve ball surface passing through the first gap is continuously provided with attached lubricating oil during the rotation of the valve ball, and a continuous lubricating layer is formed. The outer wall of the valve seat is tightly jointed with the inner wall of the valve body, so that lubricating oil is prevented from being injected into cavities outside the valve seat and inside the valve body during oil injection, and unnecessary injection is saved. The first gap is located in the plane of a great circle of the ball in order to achieve attachment to the entire outer wall of the ball.
The utility model discloses an aspect beneficial effect who brings is: the disk seat is by two parts amalgamation, amalgamation department is equipped with the clearance, the radius of the spherical sealed face of disk seat is less than ball valve spherical surface radius simultaneously, when through limit pipe pressure equipment valve ball, certain pretightning force is exerted to the dish spring, can produce wearing and tearing along with the long-term operation valve ball and the disk seat interface of joining between, predetermined clearance and the less spherical sealed face of disk seat provide a predetermined wearing and tearing volume, even long-term operation, along with the diminishing in clearance, the radius grow of the spherical sealed face of disk seat, still can guarantee the sealing performance between valve ball and the disk seat, thereby guarantee its full sealing under regulation precision and the closure state, the valve that general ball valve does not have closes tight function promptly. Meanwhile, when the first clearance is closed, the lubricant cannot be filled, and the wear condition inside the ball valve can be obtained through the filling operation. Prompt for timely replacement.
The utility model discloses an aspect beneficial effect who brings is: the valve rod and the valve rod sleeve are difficult to lubricate from the outside, the first gap is communicated with the second gap through the top hole, and when lubricant is filled into the first gap, the lubricant filling of the valve rod part can be simultaneously realized. Meanwhile, due to the filling pressure, after the ball valve is filled, the lubricant can overflow from the second gap to the valve body, and the filling amount during filling can be quantitatively calculated during filling, so that the size of the first gap can be estimated, the wear condition of the valve seat can be indirectly estimated, and the replacement period of the ball valve can be estimated.
Drawings
Fig. 1 is a schematic external structural diagram of a first embodiment and a second embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a first embodiment of the present invention;
fig. 3 is a schematic view of a section a-a in fig. 1 according to an embodiment of the present invention;
fig. 4 is a schematic view of a section B-B in fig. 1 according to an embodiment of the present invention;
FIG. 5 is a schematic top view of a valve seat according to an embodiment of the present invention
FIG. 6 is a schematic left view of a valve ball according to an embodiment of the present invention;
fig. 7 is a schematic view of a valve stem mounting structure in accordance with an embodiment of the present invention;
fig. 8 is a schematic sectional structure diagram of a second embodiment of the present invention;
fig. 9 is a schematic view of a section B-B in fig. 1 according to a second embodiment of the present invention;
100, a valve seat, 101, a first flow channel, 102, a ball side channel opening, 103, a spherical sealing surface, 104, a top hole, 106, a first gap, 110, a first sealing surface, 111, a sealing groove, 120, a second sealing surface, 121, a sealing groove, 200, a valve ball, 201, a second flow channel, 202, a ball opening, 203, a flow guide plane, 300, a valve rod, 301, a valve rod limiting part, 302, a valve rod sleeve, 303, a second gap, 401, a middle pipe, 402, a side pipe, 403, a cavity, 404, an oil nozzle, 405, an oil hole, 500 and a disc spring.
Detailed Description
It should be noted at the outset that in the prior art, because of the sealing requirements of the valve body, it is difficult for those skilled in the art to think of lubricating the valve inner closure member by injecting lubricant directly into the valve chamber to prolong the service life of the valve. As shown in figure 1, the utility model discloses the selection installs the oil nozzle additional to the ball valve to obtain a valve mechanism that can reliably seal for a long time and open and close.
The technical solution provided by the present invention is further specifically described below by way of examples, and the new technical effects brought by the technical solution of the present invention can also be easily obtained from the examples.
Example one
As shown in fig. 1, the present embodiment is a ball valve with an oil nozzle, an oil hole penetrating through the inside and outside of the valve body is arranged in the middle of the valve body of the ball valve, a detachable oil nozzle 404 is installed at the oil hole, and lubricant can be periodically filled into the valve cavity through the oil nozzle 404 in long-term use of the ball valve.
As shown in fig. 2, 3, 4, 5, 6 and 7, in the present embodiment, a valve ball 200 and a valve seat 100 wrapping the valve ball from the left and right sides are arranged in the valve cavity, a first gap 106 surrounding the valve ball is arranged between the valve seats 100, the oil filling hole is communicated with the first gap 106, and the first gap 106 can be used as a storage cavity for containing solid lubricant when the valve ball is in an open position. The valve body in this embodiment is an all-welded valve body, and includes a middle tube 401 that forms a valve chamber, and a side tube 402 that enters the middle tube 401 and abuts against the first flow passage 101 of the valve seat 100. A disc spring 500 is provided between the side tube 402 and the valve seat 100. During assembly, the side tubes 402 on the two sides are pressurized to pre-tighten the disc spring 500, and then the two ends of the middle tube 401 are closed and welded and sealed with the outer walls of the side tubes 402. A cylindrical sealing pair is formed between the inner wall of the end of side tube 402 and second sealing surface 120 of valve seat 100 to prevent leakage of media into cavity 403 through the junction of side tube 402 and valve seat 100. Preferably, the second sealing surface 120 is provided with a sealing groove 121 so as to be sleeved with an O-ring for enhancing sealing during assembly. In other embodiments of the present invention, other sealing structures may be provided between the side tube 420 and the valve seat 100, and the second sealing surface 120 may have different combination shapes, such as spherical surface, conical surface, and irregular surface sealing. In this embodiment, the first sealing surface 110 of the outer wall of the valve seat 100 and the inner wall of the middle tube 401 form a cylindrical sealing structure to prevent the first gap 106 from communicating with the cavity 403 between the side tube and the middle tube. In this embodiment, the pre-tightening force of the disc spring 500 to press the valve seat toward the valve ball is set to make the valve seat 100 slide along the inner wall of the middle tube 401 from the left and right to the central direction of the valve ball 200 after being worn by the disc spring, so as to reduce the first gap 106, so as to extrude the solid lubricant in the first gap 106 to the surface of the valve ball 200, and as the valve ball 200 rotates, a lubricating film is formed between the valve ball 200 and the valve seat 100.
In this embodiment, the valve seat 100 is provided with the second flow channel 201 with a rectangular cross section from both sides, and is provided with the top hole 104 for penetrating the valve rod 300 from the top, the valve seat 100 internally comprises a spherical sealing surface 103 completely wrapping the valve ball 200, and the spherical sealing surface 103 is communicated with the outside only through the top hole 104 and the first flow channel 101. The intersection of the spherical sealing surface 103 and the first flow passage 101 forms a ball side port 102. The valve seat 100 is completely divided into a left valve seat and a right valve seat by a gap 206 in the middle, the left valve seat and the right valve seat are respectively provided with a hemispherical sealing surface wrapping the valve ball 200, and the gap 206 is filled with an elastic sealing layer, so that on one hand, after a cavity wrapped by the spherical sealing surface 103 works for a long time and is worn, the cavity becomes large, after the elasticity stored by the disc spring 500 is released, the elasticity of the elastic sealing layer is overcome to narrow the gap 206, the arrangement of the gap 500 improves the sealing performance between the valve seat 100 and the valve ball 200, and complete shutoff and long-term accurate flow regulation are realized; on the other hand, when the flow guide plane 203 simultaneously intersects the ball-side port 102 and the gap 206 during the rotation of the valve ball 200, a medium may leak out of the spherical sealing surface 103 from the gap 206, thereby affecting the flow rate regulation and the flow rate calibration accuracy, and the provision of the elastic sealing layer prevents the above problems. Further, in this embodiment, the radius of the spherical sealing surface 103 inside the valve seat 100 is smaller than the radius of the outer spherical surface 204 of the valve ball 200, for example, when the diameter of the spherical surface 204 is 28mm, the machining diameter of the spherical sealing surface 103 is 27.5mm, so as to ensure the tight combination between the spherical surface 204 and the spherical sealing surface 103, and ensure that a sealing pair is formed between the valve ball 200 and the valve seat 100 through the spherical surface 204 and the spherical sealing surface 103. The utility model discloses an in other some embodiments, for optimizing sealing performance or regulating power, sphere 204 can optimize for ellipsoid etc. do not influence the non-positive sphere of valve ball 200 at disk seat 100 internal rotation, keeps spherical sealing face 103 to have the complete joint sphere around valve ball 200 with sphere 204 all the time guaranteeing interference fit simultaneously, also can realize the same technological effect. In other embodiments of the present invention, the gap 206 may not be provided by modifying the structure and material of the valve seat 100 itself to satisfy a certain elastic deformation to compensate for the interface wear of the spherical sealing surface 103, especially along the compression direction of the side tube 402.
In this embodiment, a flow guiding plane 203 is disposed outside the rectangular ball opening 202 on both sides of the valve ball 200, and the flow guiding plane 203 completely covers the entire ball opening 202, so that the outer edge intersects with the spherical surface 204 to form a complete circular edge. When the valve rod 300 drives the valve ball 200 to rotate to an opening angle, the flow guide plane 203 intersects with the ball side crossing 102 on the same side to divide the ball side crossing 102 into quadrilateral crossings, one side of which is a straight line and the three sides of which are spherical curves, and the medium is guided to the second flow channel 201 by the flow guide plane 203 when flowing in from the quadrilateral crossings on the side. When the valve ball 200 is at any opening angle, the spherical surface 204 and the spherical sealing surface form a complete spherical sealing surface, so that no other flow passage is formed between the first flow passages 101 on two sides except for the second flow passage 201, and the medium is prevented from passing through any flow passage outside the valve ball. In this embodiment, since the flow guide plane 203 completely covers the ball opening 202, a medium entering the ball opening 202 must first pass through the flow guide plane 203, and when the flow guide plane 203 intersects with the ball side opening 102, a flow passage penetrating through an inlet and an outlet of the valve can be formed, so that the effective opening angle range of this embodiment is enlarged, if an effective opening angle of a common ball valve is 30-90 degrees, an actual effective opening angle of this embodiment can be 5-90 degrees, thereby improving the control accuracy. In some embodiments of the present invention, the flow guiding plane 203 may be provided with a plating layer or a texture to improve the wear resistance or the flow guiding efficiency. The outer diameter of the ball 200 in this embodiment is significantly larger than the inner diameter of the side tube 402 to achieve a better sealing fit.
In this embodiment, the valve stem sleeve 302 and the valve stem 300 are in clearance fit, that is, a second clearance 303 is provided, the valve stem 300 is connected with the valve ball 200 through the top hole 104, the second clearance 303 is also communicated with the top hole 104 along the valve stem 300, and the first clearance 106 is communicated with the top hole 104, so that when the oil nozzle 404 is filled with the solid lubricant, the lubricant can enter the second clearance 303 through the top hole 104 along the first clearance 106. This feature has at least two roles: firstly, when solid lubricant is filled for lubricating the valve ball 200 and the valve seat 100, the lubrication of moving parts including a sealing box and the like between the valve rod sleeve 302 and the valve rod 300 is realized; secondly, when fresh solid lubricant overflows from the top of the valve rod sleeve from the beginning of filling to the discovery of the filling process, if the filling amount of the filling gun is measured, the total capacity of the lubricant storage cavity which comprises the first gap 106, the top hole 104 and the second gap 303 inside the lubricant storage cavity can be obtained, and because the capacities of the top hole 104 and the second gap 303 are fixed, the capacity of the first gap 106 can be inferred, and the abrasion degree of the sealing surface of the valve seat 100 can be further evaluated.
In this embodiment, the first gap 106 is located in the middle of the valve ball 200, i.e. on a plane of a great circle of the valve ball, and completely surrounds the valve ball 200, and as the valve ball 106 rotates, the solid lubricant can form a lubricating film completely wrapping the spherical surface of the valve ball 200, thereby having the best film forming efficiency.
The disc spring 500 in this embodiment is composed of a first gasket, a conical-surface reed and a second gasket which are sequentially arranged, and the first gasket, the conical-surface reed and the second gasket are all provided with rectangular through holes. Wherein, the conical surface reed is provided with a large opening along one side of the conical surface and a small opening along the other side and has elasticity; the section of the second gasket is L-shaped, the vertical ring surface of the second gasket is attached to the small opening side of the conical surface reed, and pretightening force is applied to the conical surface reed to flatten the conical surface reed as much as possible during assembly, so that the sealing fit between the valve seat 100 and the valve ball 200 is still maintained along with the abrasion of the valve seat 100.
Example two
As shown in fig. 8 and 9, the present embodiment is a ball valve with a grease nipple, and the other appearance is consistent with the first embodiment, and the difference from the first embodiment is that the cross section of the first gap 106 is S-shaped, the grease nipple 404 passes through the grease hole on the middle pipe 401 and then is communicated with the first gap 106 through a connecting hole arranged on the valve seat 100, the connecting hole is larger than the diameter of the grease hole, but the two are not fixedly connected, so that lubricant can be filled into the first gap 106 along with the movement of the valve seat 100. This embodiment has better regulation stability, better lubrication characteristics, better service life and optimized process costs.
The diameter of the second flow channel 201 inside the valve ball 200 of this embodiment is larger than the diameter of the ball port 202, specifically, a spherical cavity. When the opening angle of the valve ball 200 is changed along with the driving of the valve rod 300, after the medium flows into the second flow passage 201 through the ball port 202, the medium forms small turbulence in the valve ball 200 due to the change of the drift diameter, so that the sudden change of the medium pressure in the pipeline system is prevented, a smoother flow regulating curve can be provided, the control curve for controlling the flow through the opening angle is more accurate, and the valve ball is suitable for calibration and control.
In this embodiment, the first gap 106 is primarily used for solid lubricant filling to reduce wear between the spherical surface 204 and the spherical sealing surface 103, and a continuous solid lubricant filling cavity may be formed as the gap 106 passes through the top hole 104. With the gaps 106 in their valve seats 100 being staggered S-shaped in cross-section and the gaps 104 passing through the top hole 104. According to the description of the first embodiment, when the flow guide plane intersects with the gap 106 and the ball-side port, a new flow channel except the second flow channel is formed outside the spherical sealing surface, but on one hand, the sectional area of the gap 106 is fixed within a period of time, and on the other hand, the sectional area is much smaller than that of the second flow channel, and the precision requirement can be met through the calibrated opening curve. Meanwhile, considering the failure mode of the gap 106, after long-term use, the sectional area of the gap 106 is gradually reduced, so that the expansion of the drift diameter of the ball mouth and the flow guide plane due to abrasion is compensated, and the control precision after one-time calibration is prolonged. In addition, even if the gap 106 is completely closed due to long-term use, the first gap 106 disappears after long-term wear, and therefore, it is found that the solid lubricant cannot be filled when the solid lubricant is periodically filled, and it is judged that the ball valve should be replaced, and at this time, the filling operation of the filler nozzle can function as an internal wear test.
After the solid lubricant is filled into the S-shaped first gap 106, since the contact area between the solid lubricant and the valve seat 100 becomes larger, and since the medium has a larger flow resistance when passing through the first gap 106, the scouring effect on the solid lubricant can be reduced, and the loss of the solid lubricant can be reduced to provide a longer effective lubrication time.
Claims (10)
1. The utility model provides a ball valve that has oiling mouth which characterized in that: the lubricating device comprises an oil injection nozzle arranged on a valve body, wherein the oil injection nozzle is used for injecting lubricant into a valve cavity through an oil injection hole penetrating through the inside and the outside of the valve body.
2. A spout-equipped ball valve according to claim 1, wherein: the valve cavity is internally provided with a valve ball and a valve seat wrapping the valve ball from two sides, the annular outer wall of the valve seat is completely and tightly jointed with the inner wall of the valve body, a first gap surrounding the valve ball is arranged between the valve seats, and the oil filling hole is communicated with the first gap.
3. A spout-equipped ball valve according to claim 2, wherein: the valve body comprises a middle pipe and a side pipe sleeved in the middle pipe; the outer wall of the valve seat and the inner wall of the middle pipe form a cylindrical surface sealing structure so as to prevent the first gap from being communicated with the cavity between the side pipe and the middle pipe.
4. A spout-equipped ball valve according to claim 3, wherein: and a sealing ring is arranged between the outer wall of the valve seat and the inner wall of the middle pipe.
5. A spout-equipped ball valve according to claim 3, wherein: a disc spring is arranged between the valve seat and the side pipe, and the disc spring is provided with a pretightening force for pressing the valve seat to the valve ball; the valve seat slides along the inner wall of the valve body towards the valve ball direction after being worn under the action of the disc spring so as to reduce the first gap.
6. A spout-equipped ball valve according to claim 2, wherein: comprises a valve rod; the valve seat is provided with a top hole, and the valve rod penetrates through the top hole and is connected with the valve ball; the first gap is communicated with the top hole.
7. A spout-equipped ball valve according to claim 6, wherein: the valve rod sleeve is arranged on the valve body, a second gap is formed between the valve rod sleeve and the valve rod, and the first gap is communicated with the second gap through a top hole.
8. A spout-equipped ball valve according to claim 2, wherein: the first gap is S-shaped in cross section.
9. A spout-equipped ball valve according to claim 2, wherein: the first gap is located in the plane of a great circle of the valve ball.
10. A spout-equipped ball valve according to any one of claims 1 to 9, wherein: the oil injection nozzle is detachably connected with the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920792186.7U CN210461759U (en) | 2019-05-29 | 2019-05-29 | Ball valve with oil injection nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920792186.7U CN210461759U (en) | 2019-05-29 | 2019-05-29 | Ball valve with oil injection nozzle |
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| Publication Number | Publication Date |
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| CN210461759U true CN210461759U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920792186.7U Active CN210461759U (en) | 2019-05-29 | 2019-05-29 | Ball valve with oil injection nozzle |
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| CN (1) | CN210461759U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321173A (en) * | 2020-12-22 | 2021-08-31 | 深圳九维时空科技有限公司 | Intelligent quantitative high-viscosity grease filling machine |
-
2019
- 2019-05-29 CN CN201920792186.7U patent/CN210461759U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321173A (en) * | 2020-12-22 | 2021-08-31 | 深圳九维时空科技有限公司 | Intelligent quantitative high-viscosity grease filling machine |
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