CN209818749U - Double-stop composite valve - Google Patents
Double-stop composite valve Download PDFInfo
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- CN209818749U CN209818749U CN201920178560.4U CN201920178560U CN209818749U CN 209818749 U CN209818749 U CN 209818749U CN 201920178560 U CN201920178560 U CN 201920178560U CN 209818749 U CN209818749 U CN 209818749U
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Abstract
The utility model discloses a two stop combination valves, including the hand wheel, drive assembly and valve body, install the first disk seat that has first inner chamber and the second disk seat that has the second inner chamber in the valve body, be provided with first case with first disk seat complex, be provided with the second valve core with second valve seat complex, it moves down to seal second case and second valve seat with first case and first disk seat after sealing down first valve rod and second valve rod through drive assembly drive during hand wheel corotation, it shifts up to open first case and first disk seat with second case after opening with second case and second valve rod through drive assembly drive first valve rod and second valve rod during hand wheel reversal. Use the utility model provides a two shut-off combination valves, through the double-valve rod, the double-valve core, the double-valve seat structure, the reliability sealed has fully been guaranteed to the twice seal when closing, and the leakproofness is better. And the first valve seat and the second valve seat which are independently movable at two sides avoid the difficulties of surfacing and processing the valve body.
Description
Technical Field
The utility model relates to the technical field of valves, more specifically say, relate to a two shut-off combination valves.
Background
The stop valve, also called stop valve, is one of the most widely used valves, and it is popular because the friction between the sealing surfaces is small in the opening and closing process, it is durable, the opening height is not large, it is easy to manufacture, it is convenient to maintain, it is not only suitable for middle and low pressure, but also for high pressure. The closing principle of the stop valve is that the sealing surface of the valve clack is tightly attached to the sealing surface of the valve seat by means of the pressure of the valve rod, and the medium is prevented from flowing.
The sealing pair of the stop valve consists of a valve clack sealing surface and a valve seat sealing surface, and the valve rod drives the valve clack to vertically move along the central line of the valve seat. The stop valve is small in opening height in the opening and closing process, easy to adjust flow, convenient to manufacture and maintain and wide in pressure application range.
However, although the valve can be closed by sealing the valve rod and the valve seat together, the stop valve is prone to failure if the valve rod or the valve seat fails, and the sealing reliability of the stop valve is low.
In summary, how to effectively solve the problems of low sealing reliability and the like of the stop valve is a problem to be solved by those skilled in the art at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a double-stop combination valve, which can effectively solve the problem of low sealing reliability of the stop valve.
In order to achieve the above object, the utility model provides a following technical scheme:
a double-stop composite valve comprises a hand wheel, a transmission assembly and a valve body, wherein a first valve seat with a first inner cavity and a second valve seat with a second inner cavity are installed in the valve body;
the first valve rod and the second valve rod are driven to move downwards through the transmission assembly during forward rotation of the hand wheel so as to seal the first valve core and the first valve seat after the second valve core and the second valve seat are sealed, and the first valve rod and the second valve rod are driven to move upwards through the transmission assembly during reverse rotation of the hand wheel so as to open the second valve core and the second valve seat after the first valve core and the first valve seat are opened.
Preferably, in the above-mentioned double-stop combination valve, the transmission assembly include with the input shaft coaxial fixed connection's of hand wheel pinion and with the gear wheel of pinion meshing, with first valve rod with the second valve rod complex is provided with first nut and second nut respectively, first nut along with the input shaft synchronous rotation, the second nut along with the gear wheel synchronous rotation, first valve rod with be provided with first anti-rotation block and second on the second valve rod respectively and prevent the piece so that when first nut with the second nut rotates first valve rod with second valve rod respectively rectilinear movement.
Preferably, in the above-mentioned double-stop combination valve, a disc spring is disposed between the large gear and the second nut.
Preferably, in the above double-stop combination valve, the bull gear is coaxially and fixedly connected to a driven shaft, and the driven shaft is coaxially and fixedly connected to the second nut.
Preferably, in the double-stop combination valve, the first nut is coaxially and fixedly connected with the input shaft.
Preferably, in the above-mentioned double-stop combination valve, a through hole for communicating the first inner cavity with the second inner cavity is formed in the second valve seat.
Preferably, in the double-stop composite valve, the sealing surface of the first valve seat is lower than the sealing surface of the second valve seat.
The utility model provides a two compound valves that cut off includes hand wheel, drive assembly and valve body. The valve body is internally provided with a first valve seat with a first inner cavity and a second valve seat with a second inner cavity, a first valve core is arranged in a manner of being matched with the first valve seat, a second valve core is arranged in a manner of being matched with the second valve seat, the first valve core is connected with a first valve rod, the second valve core is connected with a second valve rod, the stroke of the first valve rod is greater than that of the second valve rod, the valve body is provided with a liquid inlet communicated with the first inner cavity and a liquid outlet communicated with the second inner cavity, and the first inner cavity is communicated with the second inner cavity; when the hand wheel rotates forwards, the transmission assembly drives the first valve rod and the second valve rod to move downwards so as to seal the second valve core and the second valve seat and then seal the first valve core and the first valve seat, and when the hand wheel rotates backwards, the transmission assembly drives the first valve rod and the second valve rod to move upwards so as to open the first valve core and the first valve seat and then open the second valve core and the second valve seat.
Use the utility model provides a two shut-off combination valves drives first valve rod and second valve rod through drive assembly during hand wheel corotation and moves down, and because the stroke of first valve rod is greater than the stroke of second valve rod, the event seals second case and second valve seat earlier, realizes first sealing promptly, and later with first case and first valve seat seal, realize that the second is sealed promptly. The two seals are closed in sequence, and the whole valve is completely closed. When the handwheel rotates reversely, the first valve rod and the second valve rod are driven by the transmission assembly to move upwards so as to open the first valve core and the first valve seat and then open the second valve core and the second valve seat. The two seals are opened in sequence to realize the complete opening of the whole valve. Through the structure of the double valve rods, the double valve cores and the double valve seats, the reliability of sealing is fully ensured by two seals when the valve is closed, and the sealing performance is better. And the first valve seat and the second valve seat which are independently movable at two sides avoid the difficulties of surfacing and processing the valve body. Because of the independent movable valve seat, the maintenance is convenient, and the online repair can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a double block combination valve according to an embodiment of the present invention;
FIG. 2 is an enlarged partial schematic view of FIG. 1;
FIG. 3 is a schematic view of a second valve seat;
fig. 4 is a schematic structural view of the first and second lumens.
The drawings are numbered as follows:
the valve comprises a valve body 1, a first valve seat 2, a first valve core 3, a cage 4, a first packing pad 5, a first packing 6, a first pressing sleeve 7, a first pressing plate 8, a first anti-rotation block 9, a first valve rod 10, a first nut 11, a gear transmission box 12, an input shaft 13, a hand wheel 14, a second nut 15, a support rod 16, a transmission rod 17, an adapter 18, a second valve rod 19, a second anti-rotation block 20, a second pressing plate 21, a second pressing sleeve 22, a second packing 23, a second packing pad 24, a fastening bolt nut 25, a valve body on the side 26, a second valve core 27, a second valve seat 28, a disc spring 29, a through hole 30, a first inner cavity 31, a second inner cavity 32, an M pinion and an N bull gear.
Detailed Description
The embodiment of the utility model discloses two shut-off combination valves to improve sealing reliability.
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. 1-4, fig. 1 is a schematic structural diagram of a double-stop combination valve according to an embodiment of the present invention; FIG. 2 is an enlarged partial schematic view of FIG. 1; FIG. 3 is a schematic view of a second valve seat; fig. 4 is a schematic structural view of the first and second lumens.
In one embodiment, the present invention provides a double block compounding valve that includes a hand wheel 14, a transmission assembly, and a valve body 1.
The valve body 1 is internally provided with a first valve seat 2 with a first inner cavity 31 and a second valve seat 28 with a second inner cavity 32, the first valve seat 2 and the second valve seat 28 are independent from each other, and both are movable valve seats. The first valve core 3 is arranged and matched with the first valve seat 2, the second valve core 27 is arranged and matched with the second valve seat 28, the first valve core 3 is connected with the first valve rod 10, the second valve core 27 is connected with the second valve rod 19, and the stroke of the first valve rod 10 is larger than that of the second valve rod 19. Namely, the valve body 1 is provided with two inner cavities, the first valve core 3 and the second valve seat 28 form a first inner cavity 31, the second valve core 27 and the second valve seat 28 form a second inner cavity 32, the first valve rod 10 drives the first valve core 3 to move up and down, the second valve rod 19 drives the second valve core 27 to move up and down, and when the first valve core 3 and the second valve core 27 move down to be matched with the sealing surface of the first valve seat 2 and the sealing surface of the second valve seat 28 respectively, two sealing operations are realized.
The valve body 1 has an inlet communicating with the first inner chamber 31 and an outlet communicating with the second inner chamber 32, the first inner chamber 31 communicating with the second inner chamber 32. When both the first valve spool 3 and the second valve spool 27 are open, the medium flows in from the inlet and out from the outlet, i.e. the medium flows in from the left to the right as shown in fig. 1.
The handwheel 14 is used for receiving the operation of a user, when the handwheel 14 rotates forwards, the first valve rod 10 and the second valve rod 19 are driven by the transmission assembly to move downwards so as to seal the second valve core 27 and the second valve seat 28 and then seal the first valve core 3 and the first valve seat 2, when the handwheel 14 rotates backwards, the first valve rod 10 and the second valve rod 19 are driven by the transmission assembly to move upwards so as to open the first valve core 3 and the first valve seat 2 and then open the second valve core 27 and the second valve seat 28. Specifically, the forward rotation of the hand wheel 14 may be clockwise rotation of the hand wheel 14, and then the input shaft 13 of the hand wheel 14 synchronously rotates clockwise, and the reverse rotation correspondingly rotates counterclockwise of the hand wheel 14, and then the input shaft 13 synchronously rotates counterclockwise. If desired, the forward rotation of the hand wheel 14 may be a counterclockwise rotation, and the corresponding reverse rotation may be a clockwise rotation.
Use the utility model provides a two shut-off combination valves, it moves down through drive assembly drive first valve rod 10 and second valve rod 19 during hand wheel 14 corotation, and because the stroke of first valve rod 10 is greater than the stroke of second valve rod 19, so earlier with second valve core 27 and second valve seat 28 sealed, realize first sealing promptly, later with first case 3 and first disk seat 2 sealed, realize that the second is sealed promptly. The two seals are closed in sequence, and the whole valve is completely closed. When the hand wheel 14 rotates reversely, the first valve rod 10 and the second valve rod 19 are driven by the transmission assembly to move upwards so as to open the first valve core 3 and the first valve seat 2 and then open the second valve core 27 and the second valve seat 28. The two seals are opened in sequence to realize the complete opening of the whole valve. Through the structure of the double valve rods, the double valve cores and the double valve seats, the reliability of sealing is fully ensured by two seals when the valve is closed, and the sealing performance is better. And the first valve seat 2 and the second valve seat 28 with two independently movable sides avoid the difficulty of surfacing and processing on the valve body 1. Because of the independent movable valve seat, the maintenance is convenient, and the online repair can be realized.
Specifically, the transmission assembly comprises a pinion M and a gearwheel N, wherein the pinion M is coaxially and fixedly connected with an input shaft 13 of a hand wheel 14, the gearwheel N is meshed with the pinion M, a first nut 11 and a second nut 15 are respectively arranged on the first valve rod 10 and the second valve rod 19 in a matched mode, the first nut 11 rotates synchronously with the input shaft 13, the second nut 15 rotates synchronously with the gearwheel N, and a first anti-rotation block 9 and a second anti-rotation block 20 are respectively arranged on the first valve rod 10 and the second valve rod 19 so that the first valve rod 10 and the second valve rod 19 respectively move linearly when the first nut 11 and the second nut 15 rotate. I.e. the transmission assembly is a gear box 12 in which a gearwheel N and a pinion M are arranged.
When the valve is closed, the hand wheel 14 is rotated in the forward direction, and the input shaft 13 correspondingly rotates in the forward direction. The pinion M fixed on the input shaft 13 rotates forward correspondingly, the pinion M drives the bull gear N to rotate reversely, so that the second nut 15 rotates reversely, and the second valve rod 19 can only move downwards due to the second anti-rotation block 20 arranged on the second valve rod 19. In addition, the pinion M and the input shaft 13 rotate in the forward direction to drive the first nut 11 to rotate in the forward direction, the first valve rod 10 can only move downwards due to the fact that the first rotation preventing block 9 is arranged on the first valve rod 10, and the stroke of the first valve rod 10 is larger than that of the second valve rod 19, so that the second valve core 27 is meshed with the second valve seat 28 firstly along with the rotation of the hand wheel 14, and first sealing is achieved firstly. As the hand wheel 14 continues to rotate, the first valve stem 10 continues to move downward a distance, engaging the first valve element 3 with the first valve seat 2, and achieving a second seal. The two seals are closed in sequence, and the whole valve is completely closed.
When the valve is opened, the hand wheel 14 is rotated reversely, the input shaft 13 rotates reversely correspondingly, the pinion M fixed on the input shaft 13 rotates reversely and drives the gearwheel N to rotate forward, because the speed of the pinion M is higher than that of the gearwheel N, and the first valve rod 10 is provided with the first anti-rotation block 9, the first valve rod 10 can only move upwards, so that the first valve core 3 and the first valve seat 2 are disengaged firstly, the second seal is opened firstly, then the hand wheel 14 is continuously rotated, the gearwheel N continues to rotate forward, the second nut 15 rotates forward, and because the second anti-rotation block 20 is arranged on the second valve rod 19, the second valve rod 19 can only move upwards, the second valve core 27 and the second valve seat 28 are driven to be disengaged, and the first seal is opened. The two seals are opened in sequence to realize the complete opening of the whole valve.
For the specific matching between the rotation prevention block and the valve rod and between the valve rod and the nut, reference is made to the prior art, and details thereof are not repeated herein. The transmission structure is simple and reliable, and does not have the phenomenon of jamming. Specifically, the first nut 11 and the second nut 15 may be trapezoidal nuts.
Further, a disc spring 29 is disposed between the large gear N and the second nut 15. Through the setting of the disc spring 29, in the valve closing process, after the first sealing is firstly realized between the second valve core 27 and the second valve, the hand wheel 14 is continuously rotated, the first nut 11 is continuously rotated, the pinion M drives the bull gear N to rotate, because the first sealing is closed at this time, the second valve rod 19 cannot continuously move downwards, and the disc spring 29 is compressed while the second nut 15 rotates, so that the continuous downward movement of the first valve rod 10 is not influenced, and the first valve core 3 and the second valve seat 28 are sealed. Specifically, the compression amount of the disc spring 29 may be in the range of 3 to 5 mm.
In the above process, the forward direction is taken as a clockwise direction for example, and the reverse direction is taken as a counterclockwise direction, so that the thread of the first nut 11 is rotated leftwards.
Furthermore, the gearwheel N is coaxially fixedly connected with a driven shaft, which is coaxially fixedly connected with the second nut 15. That is, a driven shaft is disposed in cooperation with the bull gear N, and when the bull gear N is driven by the pinion gear M to rotate, the driven shaft synchronously rotates, and further drives the second nut 15 to rotate. The driven shaft is arranged to facilitate connection with the second nut 15.
Specifically, the first nut 11 is coaxially and fixedly connected with the input shaft 13. Further, the input shaft 13 rotates and simultaneously drives the first nut 11 to synchronously rotate, and the first nut 11 can also be fixedly connected with the pinion M and synchronously rotate as required, but the connection structure is relatively complex. The input shaft 13 and the first nut 11 rotate synchronously, and do not move relatively in the axial direction, and similarly, the driven shaft and the second nut 15 rotate synchronously, and do not move relatively in the axial direction, and the valve rod moves up and down by the rotation of the first nut 11 and the second nut 15, so that the valve is opened or closed.
The first inner cavity 31 is communicated with the second inner cavity 32, and specifically, a through hole 30 for communicating the first inner cavity 31 with the second inner cavity 32 may be opened on the second valve seat 28. As shown in fig. 3, the through hole 30 is provided to communicate the first inner chamber 31 with the second inner chamber 32.
In addition to the above embodiments, the sealing surface of the first valve seat 2 is lower than the sealing surface of the second valve seat 28. I.e. the valve body 1 adopts a low-in-high, in the illustration of fig. 1, i.e. the medium enters from the left and exits from the right. Through the setting of low income eminence, be more favorable to guaranteeing the leakproofness.
In the above embodiments, the double-stop composite valve may be provided with the cage 4, the first packing pad 5, the first packing 6, the first pressing sleeve 7 and the first pressing plate 8 corresponding to the first valve stem 10 for effective sealing. The second valve stem 19 may be provided with a second packing pad 24, a second packing 23, and a second press sleeve 22 and a second press plate 21 for effective sealing. The second valve rod 19 can be connected to the transmission rod 17 via an adapter 18, the transmission rod 17 in turn engaging with the second nut 15, i.e. the second valve rod 19 engages indirectly with the second nut 15 via the transmission rod 17. To facilitate mounting of the transmission assembly, a support bar 16 may be provided to support the gear box 12. A side valve body 26 can be arranged on the side of the second valve seat 28 remote from the first valve seat 2, the side valve body 26 is fixedly connected to the valve body 1 by means of a fastening screw nut 25, and a flow channel for the passage of a medium is provided on the side valve body 26, which flow channel communicates with the outlet of the valve body 1.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A double-stop composite valve is characterized by comprising a hand wheel, a transmission assembly and a valve body, wherein a first valve seat with a first inner cavity and a second valve seat with a second inner cavity are installed in the valve body;
the first valve rod and the second valve rod are driven to move downwards through the transmission assembly during forward rotation of the hand wheel so as to seal the first valve core and the first valve seat after the second valve core and the second valve seat are sealed, and the first valve rod and the second valve rod are driven to move upwards through the transmission assembly during reverse rotation of the hand wheel so as to open the second valve core and the second valve seat after the first valve core and the first valve seat are opened.
2. The double block combination valve according to claim 1, wherein the transmission assembly comprises a pinion fixedly connected to the input shaft of the hand wheel coaxially and a gearwheel meshed with the pinion, a first nut and a second nut are respectively provided to cooperate with the first valve stem and the second valve stem, the first nut rotates synchronously with the input shaft, the second nut rotates synchronously with the gearwheel, and a first anti-rotation block and a second anti-rotation block are respectively provided to the first valve stem and the second valve stem so that the first valve stem and the second valve stem respectively move linearly when the first nut and the second nut rotate.
3. The double block compounding valve of claim 2, wherein a disc spring is disposed between the bull gear and the second nut.
4. The double block compounding valve of claim 2, wherein the bull gear is fixedly connected coaxially with a driven shaft, the driven shaft being fixedly connected coaxially with the second nut.
5. The double block compounding valve of claim 4, wherein the first nut is fixedly connected coaxially with the input shaft.
6. The double block and compound valve of claim 1, wherein the second valve seat defines a through hole for communicating the first interior chamber with the second interior chamber.
7. The double block compounding valve of any one of claims 1-6, wherein a sealing surface of the first valve seat is lower than a sealing surface of the second valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920178560.4U CN209818749U (en) | 2019-01-31 | 2019-01-31 | Double-stop composite valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920178560.4U CN209818749U (en) | 2019-01-31 | 2019-01-31 | Double-stop composite valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209818749U true CN209818749U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920178560.4U Active CN209818749U (en) | 2019-01-31 | 2019-01-31 | Double-stop composite valve |
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| Country | Link |
|---|---|
| CN (1) | CN209818749U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306913A (en) * | 2022-08-13 | 2022-11-08 | 杭州金山仪表阀业有限公司 | Self-adaptive flow regulating valve |
-
2019
- 2019-01-31 CN CN201920178560.4U patent/CN209818749U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306913A (en) * | 2022-08-13 | 2022-11-08 | 杭州金山仪表阀业有限公司 | Self-adaptive flow regulating valve |
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