CN209977277U - Plunger type stop valve - Google Patents
Plunger type stop valve Download PDFInfo
- Publication number
- CN209977277U CN209977277U CN201920421185.1U CN201920421185U CN209977277U CN 209977277 U CN209977277 U CN 209977277U CN 201920421185 U CN201920421185 U CN 201920421185U CN 209977277 U CN209977277 U CN 209977277U
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- valve
- plunger
- pressure spring
- sealing ring
- flexible sealing
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Abstract
The utility model discloses a plunger type stop valve, the utility model relates to the technical field of valves, concretely relates to plunger type stop valve. The utility model discloses a benefit: the utility model discloses the pressure spring has been set up, when the valve is in the open mode, the pressure spring is because deformation produces the effort, this effort pushes down the plunger and can offset some medium and produce an ascending thrust to the plunger, thereby the resistance that artificial operating force was overcome has been reduced, thereby make manual operation more light, the switching of control flap that can be better, and because offset some medium and produce an ascending thrust to the plunger, thereby extrusion and friction between the screw thread of valve rod and the screw thread of valve gap have been reduced, thereby the protection screw thread, the phenomenon of taking off the silk prevents to appear, the life of device has been improved.
Description
Technical Field
The utility model relates to the technical field of valves, concretely relates to plunger type stop valve.
Background
Plunger type stop valves are widely used in pipeline systems as common stop valves. Referring to the device disclosed in reference 1 (patent No. 2012201394149, patent name: plunger stop valve), there still remain some problems in practical use: (1) when the stop valve is opened or closed, as a medium enters the valve from the right lower part of the plunger, the medium generates an upward thrust to the plunger, and the valve rod has a friction force between the valve rod and the filler when moving up and down, and the resistance formed by the thrust force and the friction force is overcome by the manual operation force, so that the hand wheel is manually rotated, the hand wheel is extremely stressed and rotates slowly, the valve is further opened and closed to have certain hysteresis, the resistance makes the threads of the valve rod and the valve cover stressed excessively, after long-term use, the thread stripping phenomenon occurs on the valve rod and the valve cover, the device is damaged, and the service life of the device is shortened. (2) The device's sealing performance is relatively poor, and the device has adopted the cooperation of plunger ring and annular valve seat sealed, but when the medium velocity of flow is big, the medium can directly break away plunger ring and annular valve seat, the condition of leaking appears to the stop valve is in the closed condition of longer time, and the medium is long-term to plunger ring impact, leads to the plunger ring to take place ageing emergence deformation, further leads to the leakproofness of device to descend.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a plunger type stop valve for solving above-mentioned problem.
A plunger stop valve comprises a valve body, a valve cover, a valve rod, a plunger, a pressure spring and a hand wheel, wherein a valve seat is arranged in the valve body, the top of the valve body is provided with a valve cover, the top of the valve seat is arranged in an inclined plane, the inner wall of the valve seat is provided with an annular groove, the valve seat is provided with a plunger, a first flexible sealing ring is embedded in the side wall of the plunger, the bottom surface of the first flexible sealing ring is provided with an inclined surface matched with the top of the valve seat, a second flexible sealing ring is also embedded at the bottom of the plunger and is matched with the annular groove, a valve rod is fixed at the top of the plunger, a plunger cavity for accommodating the plunger is arranged in the valve cover, the valve rod passes through the valve cover to be connected with a hand wheel, the pressure spring is arranged in the plunger cavity and sleeved outside the valve rod, one end of the pressure spring abuts against the plunger, and the other end of the pressure spring abuts against the valve cover.
Preferably, the valve rod and the plunger are connected by welding.
Preferably, the valve body and the valve cover are connected by bolts.
The utility model discloses an actively the effect as follows:
1. the utility model discloses the pressure spring has been set up, when the valve is in the open mode, the pressure spring is because deformation produces the effort, this effort pushes down the plunger and can offset some medium and produce an ascending thrust to the plunger, thereby the resistance that artificial operating force was overcome has been reduced, thereby make manual operation more light, the switching of control flap that can be better, and because offset some medium and produce an ascending thrust to the plunger, thereby extrusion and friction between the screw thread of valve rod and the screw thread of valve gap have been reduced, thereby the protection screw thread, the phenomenon of taking off the silk prevents to appear, the life of device has been improved.
2. The utility model discloses first flexible sealing ring and the flexible sealing ring of second have been set up, when the valve was closed, the flexible sealing ring of second can cooperate the annular groove to realize preliminary sealing, it is too big when the medium flow rate, the flexible sealing ring of second can block most medium, even there is some medium to break away the flexible sealing ring of second, first flexible sealing ring can cooperate the disk seat to realize secondary seal, the leakproofness of device has been improved greatly, and, first flexible sealing ring has been protected, the service life of device has been improved.
3. The utility model has the advantages of simple structure, the practicality is high, and is sealed effectual, is applicable to and promotes on a large scale.
Drawings
Fig. 1 is a schematic view of the opening structure of the present invention.
Fig. 2 is a schematic view of the closing structure of the present invention.
In the figure: the valve comprises an outer valve body 1, a valve cover 2, a valve rod 3, a plunger 4, a pressure spring 5, a valve seat 6, an annular groove 61, a first flexible sealing ring 7, a second flexible sealing ring 8, a plunger cavity 9 and a plunger cavity 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, a plunger stop valve includes a valve body 1, a valve cover 2, a valve rod 3, a plunger 4, a pressure spring 5, and a hand wheel 10, wherein a valve seat 6 is installed in the valve body 1, the valve cover 2 is installed on the top of the valve body 1, the top of the valve seat 6 is arranged in an inclined plane, an annular groove 61 is opened on the inner wall of the valve seat 6, the plunger 4 is installed on the valve seat 6, a first flexible sealing ring 7 is embedded on the side wall of the plunger 4, an inclined plane matched with the top of the valve seat 6 is arranged on the bottom surface of the first flexible sealing ring 7 to realize sealing, a second flexible sealing ring 8 is further embedded on the bottom of the plunger 4, the second flexible sealing ring 8 is matched with the annular groove 61 to realize primary sealing, the valve rod 3 is fixed on the top of the plunger 4, a plunger cavity 9 for accommodating the plunger 4 is arranged in the valve cover 2, a pressure spring 5 is arranged in the plunger cavity 9, the pressure spring 5 is sleeved on the outer side of the valve rod 3, one end of the pressure spring 5 abuts against the plunger 5, and the other end of the pressure spring 5 abuts against the valve cover 2.
As a technical optimization scheme of the utility model, valve rod 3 and plunger 4 adopt welding mode to connect, make valve rod 3 and plunger 4 connect more stably through welding mode, difficult fracture takes place.
As a technical optimization scheme, valve body 1 and valve gap 2 between adopt the bolt to connect, through the pretension of the adjustable valve body of bolt 1 and valve gap 2, improve the leakproofness and the stability of device.
Example 1
Please refer to fig. 2, the utility model discloses be in the closed condition when using, pressure spring 5 is in initial condition, the flexible sealing ring of second 8 cards are gone into in the annular groove 61, the flexible sealing ring of second 8 cooperation annular grooves 61 realizes preliminary sealing, it is too big when the medium velocity of flow, there is some medium to break away the flexible sealing ring of second 8, when second flexible sealing ring 8 and annular groove 61 take place to leak promptly, first flexible sealing ring 7 can cooperate disk seat 6 to realize secondary seal, the leakproofness of device can be improved greatly, and, first flexible sealing ring 7 has been protected, the service life of device has been improved.
Example 2
Referring to fig. 1 again, the difference between this embodiment and embodiment 1 is that when the hand wheel 10 is rotated by the operator to drive the plunger 4 to move upwards through the valve rod 3, so as to open the valve, at this time, the pressure spring 5 is in a compressed state, and the pressure spring 5 generates an acting force due to deformation, and the acting force pushes the plunger 4 downwards to offset an upward thrust generated by a part of the medium on the plunger 4, so as to reduce the resistance overcome by the manual operating force, so that the manual operation is more convenient, and the valve can be better controlled, and because an upward thrust generated by a part of the medium on the plunger is offset, the extrusion and friction between the thread of the valve rod 3 and the thread of the valve cover 2 are reduced, so as to protect the threads, prevent the phenomenon of thread separation, and prolong the service life of the device.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. A plunger type stop valve is characterized by comprising a valve body (1), a valve cover (2), a valve rod (3), a plunger (4), a pressure spring (5) and a hand wheel (10), wherein a valve seat (6) is installed in the valve body (1), the valve cover (2) is arranged at the top of the valve body (1), the top of the valve seat (6) is arranged in an inclined plane, an annular groove (61) is formed in the inner wall of the valve seat (6), the plunger (4) is arranged on the valve seat (6), a first flexible sealing ring (7) is embedded in the side wall of the plunger (4), an inclined plane matched with the top of the valve seat (6) is arranged at the bottom of the first flexible sealing ring (7), a second flexible sealing ring (8) is further embedded at the bottom of the plunger (4), the second flexible sealing ring (8) is matched with the annular groove (61), the valve rod (3) is fixed at the top of the plunger (, valve gap (2) inside is provided with plunger chamber (9) that hold plunger (4), and valve rod (3) pass valve gap (2) and connect hand wheel (10), be provided with pressure spring (5) in plunger chamber (9), pressure spring (5) cover is in the outside of valve rod (3), and plunger (4) are supported to the one end of pressure spring (5), and valve gap (2) are supported to the other end of pressure spring (5).
2. The plunger-type shut-off valve as in claim 1, wherein: the valve rod (3) and the plunger (4) are connected in a welding mode.
3. The plunger-type shut-off valve as in claim 1, wherein: the valve body (1) and the valve cover (2) are connected through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920421185.1U CN209977277U (en) | 2019-03-30 | 2019-03-30 | Plunger type stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920421185.1U CN209977277U (en) | 2019-03-30 | 2019-03-30 | Plunger type stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209977277U true CN209977277U (en) | 2020-01-21 |
Family
ID=69256134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920421185.1U Expired - Fee Related CN209977277U (en) | 2019-03-30 | 2019-03-30 | Plunger type stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209977277U (en) |
-
2019
- 2019-03-30 CN CN201920421185.1U patent/CN209977277U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20200121 Termination date: 20210330 |