CN219242670U - Floating split type double-seat straight-stroke control valve - Google Patents
Floating split type double-seat straight-stroke control valve Download PDFInfo
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- CN219242670U CN219242670U CN202320796509.6U CN202320796509U CN219242670U CN 219242670 U CN219242670 U CN 219242670U CN 202320796509 U CN202320796509 U CN 202320796509U CN 219242670 U CN219242670 U CN 219242670U
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Abstract
The utility model discloses a floating split double-seat straight travel control valve, which comprises a lower valve seat, an upper valve seat, a guide sleeve and other parts; the lower end of the lower valve seat is in sealing connection with the valve body, and a window through which fluid can pass is arranged on the side surface of the lower valve seat; the upper valve seat is positioned above the lower valve seat, an elastic element is arranged between the lower valve seat and the upper valve seat, and the upper valve seat can move and press down the elastic element when the valve core is in hard sealing contact with the upper valve seat. The utility model has good sealing performance and long service life, and reduces the influence of processing precision on the sealing performance.
Description
Technical Field
The utility model relates to the technical field of control valves, in particular to a floating split type double-seat straight-stroke control valve.
Background
Under the condition of high pressure difference, the single seat valve can not overcome large pressure difference, and a double seat structure is generally selected, so that the large pressure difference can be overcome, but the sealing performance is inferior to that of the single seat, so that in many places with high pressure difference, large caliber and tight cutting, the large leakage amount brings trouble and confusion to field use. To solve the leakage problem, a balanced double seat valve was invented, which solves the pressure difference problem, as shown in fig. 1 and 2. Fig. 1 and fig. 2 are respectively a conventional balanced double-seat structure, and in fig. 1, the seal is a metal hard seal, which has the disadvantages of difficult processing and manufacturing, and can not ensure that two seals are effective at the same time, and the leakage amount is large. In fig. 2, the seal part 1 adopts a hard seal, and the balance part adopts an O-shaped ring seal, so that the sealing performance is good, but the O-shaped ring rubs on the inner wall of a valve seat without lubrication for a long time, the service life is short, the failure of the O-shaped ring is accelerated under the working condition that the temperature exceeds 150 ℃, the O-shaped ring is worn for a long time, and the sealing is failed.
Disclosure of Invention
The utility model provides a floating split type double-seat straight travel control valve, which aims to solve one of the technical problems that: in the prior art, if two hard seals are adopted, two seals cannot be ensured to be effective at the same time, and the leakage amount is large, but if one hard seal is adopted, and the other hard seal is adopted, the sealing is easy to lose efficacy, and the service life is short.
In view of the foregoing problems of the prior art, according to one aspect of the disclosure, the present utility model adopts the following technical solutions:
a floating split double seat direct travel control valve, comprising:
the lower end of the lower valve seat is in sealing connection with the valve body, and a window through which fluid can pass is arranged on the side surface of the lower valve seat;
the upper valve seat is positioned above the lower valve seat, an elastic element is arranged between the lower valve seat and the upper valve seat, the inner side of the upper valve seat and a valve core arranged in the upper valve seat are sealed in a hard mode, and when the valve core is in hard sealing contact with the upper valve seat, the upper valve seat can move and press down the elastic element;
the guide sleeve is in sealing connection with the upper end of the upper valve seat, and the upper valve seat can move downwards relative to the guide sleeve.
In order to better realize the utility model, the further technical scheme is as follows:
further, the lower valve seat and the valve core arranged in the lower valve seat are sealed hard.
Further, a lower sealing gasket is arranged between the lower valve seat and the valve body.
Further, the elastic element is a spring plate.
Further, an L-shaped step is arranged at the upper end of the upper valve seat and is connected with the guide sleeve.
Further, the lower end of the guide sleeve is matched with the L-shaped step arranged at the upper end of the upper valve seat in a matching mode, and a sealing ring is arranged at the position of the plane where the guide sleeve and the upper valve seat can slide relatively.
Further, a circle of raised steps are arranged on the outer side of the upper part of the guide sleeve and connected with the valve body.
Further, a first gasket is provided on the underside of the raised step.
Further, a second gasket is provided on the upper side of the raised step.
Further, a valve cover is arranged above the guide sleeve.
Compared with the prior art, the utility model has one of the following beneficial effects:
the utility model relates to a floating split type double-seat straight travel control valve, which comprises: 1) When the valve is closed, the direction of the annular area of the upper valve seat is acted by the split floating upper valve seat medium to promote the valve core to seal. The split valve seat is adopted, so that the valve core can be sealed at the same time, and the sealing performance is just like that of two single seats. The sealing performance is better than that of the traditional double-seat valve under the same pressure difference. 2) By adopting the split floating valve seat, the sealing and pressing effect between the valve cover and the guide sleeve is better, and the force transmission can be totally acted on the two sealing gaskets to form effective plane sealing. 3) The sealing of the lower valve seat and the valve body is performed under the action of the medium and the resultant force of the spring pieces, and the sealing effect is better as the medium force is larger.
Drawings
For a clearer description of embodiments of the present application or of solutions in the prior art, reference will be made below to the accompanying drawings, which are used in the description of embodiments or of the prior art, it being apparent that the drawings in the description below are only references to some embodiments of the present application, from which other drawings can be obtained, without inventive effort, for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a conventional balanced double seat valve.
Fig. 2 is a schematic structural diagram of another balanced double seat valve.
Fig. 3 is a schematic structural view of a floating split type double seat straight stroke control valve according to an embodiment of the present utility model.
Fig. 4 is an enlarged schematic view at a of fig. 3.
Fig. 5 is a schematic view of a spool of a floating split double seat direct travel control valve in an open state according to one embodiment of the present utility model.
FIG. 6 is a schematic illustration of a spool of a floating split double seat direct travel control valve in a closed state according to one embodiment of the present utility model.
Wherein, the drawing names corresponding to the reference numerals are as follows:
the valve comprises a valve body 1, a lower sealing gasket 2, a lower valve seat 3, a spring piece 4, an upper valve seat 5, a sealing ring 6, a valve core 7, a guide sleeve 8, a first sealing gasket 9, a second sealing gasket 10, a valve cover 11 and an actuating mechanism 12.
Detailed Description
The present utility model will be described in further detail with reference to examples, but embodiments of the present utility model are not limited thereto.
Referring to fig. 2 to 6, a floating split type double-seat straight travel control valve comprises a lower valve seat 3, an upper valve seat 5, a guide sleeve 8 and other parts; the lower end of the lower valve seat 3 is in sealing connection with the valve body 1, and a window through which fluid can pass is arranged on the side surface of the lower valve seat 3; the upper valve seat 5 is positioned above the lower valve seat 3, an elastic element is arranged between the lower valve seat 3 and the upper valve seat 5, the inner side of the upper valve seat 5 and a valve core 7 arranged in the upper valve seat 5 are sealed in a hard mode, and when the valve core 7 is in hard sealing contact with the upper valve seat 5, the upper valve seat 5 can move and press down the elastic element; the guide sleeve 8 is in sealing connection with the upper end of the upper valve seat 5, and the upper valve seat 5 can move downwards relative to the guide sleeve 8. In this embodiment, in the straight stroke of the up-down movement of the valve core 7, since the upper valve seat 5 can move in a certain range up and down, the valve core 7 can be in good hard sealing contact with the upper valve seat 5, and is not affected by too much machining precision. The technical problem that two sealing parts cannot be guaranteed to be effective at the same time and the processing difficulty is high in the background art is solved.
In general, the lower valve seat 3 and the valve element 7 disposed therein are sealed with each other with a hard seal, i.e., a metal hard seal. Of course, some other modification of the seal between the lower valve seat 3 and the valve spool 7 is possible.
A lower sealing gasket 2 can be arranged between the lower valve seat 3 and the valve body 1, namely, the sealing performance between the lower valve seat 3 and the valve body 1 is improved.
The spring plate 4 can be preferably adopted as the elastic element, and the pre-tightening force of the spring plate 4 stabilizes the double valve seats, but the utility model is not limited to the double valve seats.
The upper end of the upper valve seat 5 is provided with an L-shaped step which is connected with the guide sleeve 8. The lower end of the guide sleeve 8 is provided with an L-shaped step matched with the upper end of the upper valve seat 5 to be matched with the L-shaped step, and a sealing ring 6 is arranged at the position of the plane where the guide sleeve 8 and the upper valve seat 5 can slide relatively.
A circle of raised steps are arranged on the outer side of the upper part of the guide sleeve 8 and connected with the valve body 1, and a first sealing gasket 9 is arranged on the lower side of the raised steps; the upper side of bellied step sets up second sealed 10, guide sleeve 8 top sets up valve gap 11, and valve gap 11 directly accepts the clamp force with the valve body and seals, does not have the rigid disk seat to pass power in the centre, and sealed effect is better.
With the structure, the utility model discloses a split type double seat straight travel control valve's of floating theory of operation:
the lower valve seat 3 presses the lower sealing gasket 2, and the lower sealing gasket 2 and the valve body 1 form plane stress sealing. The lower valve seat 3 is provided with a spring piece 4, an upper valve seat 5 is arranged on the spring piece 4, the upper valve seat 5 is matched with a guide sleeve 8, a sealing ring 6 is sealed relatively, the guide sleeve 8 is pressed by a valve cover 11, and a first sealing gasket 9 and a second sealing gasket 10 are arranged in the middle of the guide sleeve.
The medium flow direction is high in and low out, and when the valve is opened, the valve core 7 is at the uppermost position, as shown in fig. 5. The medium flows out through the window of the lower valve seat 3, and the pretightening force of the spring piece 4 keeps the upper valve seat 5 and the lower valve seat 3 stable. When the valve is closed, the spool 7 is in the lowermost position, as shown in fig. 6. The valve core 7 sealing line is contacted with the upper valve seat 5 and the lower valve seat 3, so that the sealing is ensured.
In the above embodiments, the direction of the force of the split floating upper seat media acting on the upper seat annular area promotes the spool seal when the valve is closed. The split valve seat is adopted, so that the valve core can be sealed at the same time, and the sealing performance is just like that of two single seats. The sealing performance is better than that of the traditional double-seat valve under the same pressure difference. Because the split floating valve seat is adopted, the sealing and pressing effect between the valve cover and the guide sleeve is better, and the force transmission can be totally acted on the two sealing gaskets to form effective plane sealing. The sealing of the lower valve seat and the valve body is performed under the action of the medium and the resultant force of the spring pieces, and the sealing effect is better as the medium force is larger.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by a difference from other embodiments, and identical and similar parts between the embodiments are mutually referred.
Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described in general in the present application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the utility model.
Although the utility model has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various variations and modifications may be made to the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will be apparent to those skilled in the art.
Claims (10)
1. A floating split double-seat straight travel control valve, characterized by comprising:
the lower end of the lower valve seat (3) is in sealing connection with the valve body (1), and a window through which fluid can pass is arranged on the side surface of the lower valve seat (3);
an upper valve seat (5) which is positioned above the lower valve seat (3), an elastic element is arranged between the lower valve seat (3) and the upper valve seat (5), the inner side of the upper valve seat (5) and a valve core (7) arranged in the upper valve seat (5) are sealed in a hard mode, and when the valve core (7) is in hard sealing contact with the upper valve seat (5), the upper valve seat (5) can move and press down the elastic element;
the guide sleeve (8) is in sealing connection with the upper end of the upper valve seat (5), and the upper valve seat (5) can move downwards relative to the guide sleeve (8).
2. The floating split double-seat straight stroke control valve according to claim 1, characterized in that the lower valve seat (3) and the valve core (7) arranged therein are sealed by hard sealing.
3. The floating split double-seat straight stroke control valve according to claim 1, characterized in that a lower gasket (2) is arranged between the lower valve seat (3) and the valve body (1).
4. The floating split double-seat direct travel control valve according to claim 1, characterized in that the elastic element is a leaf spring (4).
5. The floating split type double-seat straight travel control valve according to claim 1 is characterized in that an L-shaped step is arranged at the upper end of the upper valve seat (5) and is connected with the guide sleeve (8).
6. The floating split type double-seat straight stroke control valve according to claim 5, characterized in that the lower end of the guide sleeve (8) is provided with a shape matched with an L-shaped step arranged at the upper end of the upper valve seat (5), and a sealing ring (6) is arranged at the position of a plane where the guide sleeve (8) and the upper valve seat (5) can slide relatively.
7. The floating split type double-seat straight travel control valve according to claim 1 is characterized in that a circle of raised steps are arranged on the outer side of the upper part of the guide sleeve (8) and connected with the valve body (1).
8. The floating split double seat direct travel control valve according to claim 7, characterized in that a first gasket (9) is provided on the underside of the raised step.
9. The floating split type double seat straight travel control valve according to claim 7, characterized in that a second gasket (10) is provided on the upper side of the raised step.
10. The floating split type double-seat straight travel control valve according to claim 1 is characterized in that a valve cover (11) is arranged above the guide sleeve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320796509.6U CN219242670U (en) | 2023-04-12 | 2023-04-12 | Floating split type double-seat straight-stroke control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320796509.6U CN219242670U (en) | 2023-04-12 | 2023-04-12 | Floating split type double-seat straight-stroke control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219242670U true CN219242670U (en) | 2023-06-23 |
Family
ID=86803839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320796509.6U Active CN219242670U (en) | 2023-04-12 | 2023-04-12 | Floating split type double-seat straight-stroke control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219242670U (en) |
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2023
- 2023-04-12 CN CN202320796509.6U patent/CN219242670U/en active Active
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