CN115978212B - Stop valve with non-return function - Google Patents
Stop valve with non-return function Download PDFInfo
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- CN115978212B CN115978212B CN202310267161.6A CN202310267161A CN115978212B CN 115978212 B CN115978212 B CN 115978212B CN 202310267161 A CN202310267161 A CN 202310267161A CN 115978212 B CN115978212 B CN 115978212B
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- valve clack
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Abstract
The invention discloses a stop valve with a check function, which comprises a valve body, a valve clack, a pin spring, a valve clack pin and a valve rod, wherein the valve clack is arranged on the valve body; the valve body is connected with the valve rod, and the lower extreme center of valve rod is equipped with locking control channel, and the upstream inflow end of locking control channel intercommunication valve body, valve rod connection valve clack are equipped with on the valve clack and break away from the control channel, break away from the downstream outflow end of control channel intercommunication valve body, be equipped with on the valve rod and communicate locking control channel and break away from the control channel's connecting channel, install valve clack pin and pin spring in the connecting channel, the valve clack pin cup joints the pin spring, the valve clack pin cuts off the intercommunication of locking control channel and break away from the control channel. The device realizes the check function of the valve by arranging the valve clack, the pin spring and the valve clack pin which can slide up and down and matching the locking control channel and the separating control channel, has compact structural design, has no additional resistance when being conducted, and reduces the pressure loss when a medium passes through the stop valve.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a stop valve with a check function.
Background
The stop valve, also called a stop valve, is one of the most widely used valves, and is popular because the friction force between sealing surfaces in the opening and closing process is small, the stop valve is durable, the opening height is small, the manufacture is easy, the maintenance is convenient, and the stop valve is not only suitable for medium and low pressure, but also suitable for high pressure. The closing principle of the stop valve is that the valve clack sealing surface is tightly attached to the valve seat sealing surface by means of the valve lever pressure, so that medium circulation is prevented. Because the shut-off valve has no check function, when the shut-off valve is in an open state, fluid in the outlet chamber may flow back and easily enter the upstream of the pipeline to cause pollution, so that the shut-off valve and the check valve are commonly adopted at the same time, and the flow direction of the flowing medium in the pipeline is controlled through the two valves. However, the installation is complicated, the assembly times are high, and the whole occupied space is large. Researchers would like to be able to combine the two in view of the above, and various shut-off valves having a check function have been developed. For example, patent CN 207034290U, a check self-locking stop valve, discloses a check self-locking stop valve, which is combined into a single valve. However, the stop valve with the structure is equivalent to that the stop valve and the check valve are connected in series in the same valve body, so that the valve body is large, the manufacturing cost is high, and the whole occupied space is large. And the patent with the publication number of CN 202280884U discloses a stop check valve with the dual functions of check and stop, and the stop check valve and the check valve are not required to be installed at the same time, so that the cost is reduced, and the occupied space is small. However, the device still has the defects that the check structure is that a valve core with a guide rod and a spring is arranged at the end part of a valve rod, and the check of the valve is realized by utilizing the pressure difference of media at the two ends of the inlet valve and the outlet valve and matching with the check structure. When the check structure of the valve acts, the valve core is blocked by the reverse medium pressure, and the spring can be stretched downwards; when the valve needs to be closed, the valve rod downwards compresses the spring so that the valve core seals the valve seat. When the valve is conducted, the inflow medium needs to push the valve core to compress the spring upwards to a certain extent to achieve maximum flux, and pressure needs to be applied all the time to maintain the compression state of the spring.
Disclosure of Invention
Aiming at the problems in the background technology, the invention provides the stop valve with the check function, which has compact structure and reduces the pressure loss when a medium passes through.
The invention is realized by the following technical scheme:
a stop valve with a check function comprises a valve body, a valve clack, a pin spring, a valve clack pin and a valve rod; the valve body is connected with the valve rod, the lower extreme center of valve rod is equipped with locking control channel, locking control channel intercommunication the upstream inflow end of valve body, the valve rod is connected the valve clack, be equipped with on the valve clack and break away from control channel, break away from control channel intercommunication the downstream outflow end of valve body, be equipped with the intercommunication on the valve rod locking control channel with break away from control channel's connecting channel, install in the connecting channel valve clack pin and pin spring, the valve clack pin cup joints the pin spring, the valve clack pin cuts off locking control channel with break away from control channel's intercommunication.
Further, the pin spring, the valve clack pin, the connecting channel and the disengaging control channel are two.
Further, a stepped hole matched with the valve clack pin is formed in one end, close to the valve rod, of the separation control channel.
Further, a stepped hole is formed at the communication part of the connecting channel and the locking control channel.
Further, the outer end of the connecting channel is provided with a mounting cover plate, and a through hole matched with the valve clack pin is formed in the middle of the mounting cover plate. The connecting channel is provided with an outer end at one side close to the valve clack.
Further, a small sealing ring is arranged on the valve clack stud.
Further, a large sealing ring is arranged at the joint of the valve rod and the valve clack.
Compared with the prior art, the invention has the beneficial effects that:
the device realizes the check function of the valve by arranging the valve clack, the pin spring and the valve clack pin which can slide up and down and matching the locking control channel and the separating control channel, has compact structural design, has no additional resistance when being conducted, and reduces the pressure loss when a medium passes through the stop valve.
Drawings
FIG. 1 is a schematic diagram of a stop valve with a check function in a stop state;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic diagram of a check valve with check function according to the present invention;
FIG. 4 is a schematic diagram of a structure of a stop valve with a check function according to the present invention when the stop valve is started to check;
FIG. 5 is a partial enlarged view at B in FIG. 4;
FIG. 6 is a schematic diagram of a check valve with check function according to the present invention;
fig. 7 is a partial enlarged view at C in fig. 6.
Reference numerals:
1. a valve body; 2. a valve flap; 3. an upstream inflow end; 4. a pin spring; 5. a valve clack pin; 6. a valve stem; 7. locking the control channel; 8. disengaging the control channel; 9. a downstream outflow end; 10. a connection channel; 11. installing a cover plate; 12. a small seal ring; 13. and a large sealing ring.
The arrow direction in the figure is the medium flow direction.
Detailed Description
In order that the technical features of the present invention may be more clearly understood, a detailed description of the structure of the present invention is provided below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a stop valve with a self-check function comprises a valve body 1, a valve clack 2, a pin spring 4, a valve clack pin 5 and a valve rod 6; the valve body 1 is connected with the valve rod 6, the lower extreme center of valve rod 6 is equipped with locking control channel 7, locking control channel 7 intercommunication the upstream inflow end 3 of valve body 1, valve rod 6 is connected the valve clack 2, be equipped with on the valve clack 2 and break away from control channel 8, break away from control channel 8 intercommunication the downstream outflow end 9 of valve body 1, be equipped with the intercommunication on the valve rod 6 locking control channel 7 with break away from control channel 8's connecting channel 10, install in the connecting channel 10 valve clack pin 5 and pin spring 4, valve clack pin 5 cup joints pin spring 4, valve clack pin 5 cuts off locking control channel 7 with break away from control channel 8's intercommunication.
Further, as shown in fig. 2, 5 and 7, the pin spring 4, the clack pin 5, the connection passage 10 and the disengagement control passage 8 are two.
Further, as shown in fig. 2, 5 and 7, the end of the disengagement control channel 8 near the valve stem 6 is provided with a stepped hole matching with the flap pin 5.
Further, as shown in fig. 2, 5 and 7, a stepped hole is provided at a communication position between the connection passage 10 and the lock control passage 7.
Further, as shown in fig. 2, 5 and 7, the outer end of the connecting channel 10 is provided with a mounting cover plate 11, and a through hole matched with the valve clack pin 5 is arranged in the middle of the mounting cover plate 11. The outer end of the connecting channel 10 is close to one side of the valve clack 2.
Further, as shown in fig. 2, 5 and 7, the clack pin 5 is provided with a small sealing ring 12.
Further, as shown in fig. 2, 5 and 7, a large sealing ring 13 is arranged at the joint of the valve rod 6 and the valve clack 2.
The working principle of the invention is as follows:
when the shut-off valve is in an unused state, the flap pins 5 are acted upon by the pin springs 4, and the two flap pins 5 are completely "retracted" in the valve stem 6, i.e. the flap pins 5 do not extend into the release control channel 8. The position of the flap pin 5 is the same as that shown in fig. 5. At this time, the valve stem 6 is in a separated state from the valve flap 2.
As shown in fig. 1-3, in a normal operation state, the medium pressure at the upstream inflow end 3 of the valve is higher than the medium pressure at the downstream outflow end 9, the medium pressure in the locking control channel 7 is higher than the medium pressure in the disengaging control channel 8, the medium pressure acts on the valve clack pin 5 to enable the valve clack pin 5 to move outwards and compress the pin spring 4, so that the valve clack pin 5 stretches into the disengaging control channel 8, the relative positions of the valve rod 6 and the valve clack 2 are fixed, the valve clack 2 is lifted up and down along with the valve rod 6, and the cut-off and the conduction of the valve are realized.
As shown in fig. 4 and 5, when the valve is in a conducting state and the system medium flows backward, the medium pressure at the downstream outflow end 9 of the valve is higher than the medium pressure at the upstream inflow end 3, the medium pressure in the locking control channel 7 is lower than the medium pressure in the disengaging control channel 8, the resultant force of the medium pressure and the elasticity of the pin spring 4 acts on the valve clack pin 5 to enable the valve clack pin 5 to move inwards, the pin spring 4 stretches, and the valve clack pin 5 leaves the disengaging control channel 8 to retract into the valve rod 6. As shown in fig. 6 and 7, the valve rod 6 and the valve clack 2 slide relatively, and the valve clack 2 is quickly closed in a non-return way under the combined action of dead weight and high pressure of the backflow medium.
The present invention has been described in detail by way of examples, but the description is merely exemplary of the invention and should not be construed as limiting the scope of the invention. The scope of the invention is defined by the claims. In the technical scheme of the invention, or under the inspired by the technical scheme of the invention, similar technical schemes are designed to achieve the technical effects, or equivalent changes and improvements to the application scope are still included in the protection scope of the patent coverage of the invention.
Claims (7)
1. From stop valve of taking non return function, its characterized in that: the valve comprises a valve body (1), a valve clack (2), a pin spring (4), a valve clack pin (5) and a valve rod (6); the valve body (1) is connected with the valve rod (6), a locking control channel (7) is arranged in the center of the lower end of the valve rod (6), the locking control channel (7) is communicated with an upstream inflow end (3) of the valve body (1), the valve rod (6) is connected with the valve clack (2), a separation control channel (8) is arranged on the valve clack (2), the separation control channel (8) is communicated with a downstream outflow end (9) of the valve body (1), a connecting channel (10) which is communicated with the locking control channel (7) and the separation control channel (8) is arranged on the valve rod (6), the valve clack (5) and a pin spring (4) are arranged in the connecting channel (10), the pin spring (4) is sleeved on the valve clack pin (5), and the valve clack pin (5) cuts off the communication between the locking control channel (7) and the separation control channel (8).
The pressure of the medium at the upstream inflow end (3) is higher than the pressure of the medium at the downstream outflow end (9), and the valve clack pin (5) extends into the disengagement control channel (8); the pressure of the medium at the downstream outflow end (9) is higher than the pressure of the medium at the upstream inflow end (3), and the clapper pin (5) is retracted inside the valve stem (6) away from the disengagement control channel (8).
2. A stop valve with self-contained check function according to claim 1, wherein: the pin springs (4), the valve clack pins (5), the connecting channels (10) and the disengaging control channels (8) are two.
3. A stop valve with self-contained check function according to claim 1, wherein: one end of the separation control channel (8) close to the valve rod (6) is provided with a stepped hole matched with the valve clack pin (5).
4. A stop valve with self-contained check function according to claim 1, wherein: the connecting channel (10) and the locking control channel (7) are provided with stepped holes at the communication part.
5. A stop valve with self-contained check function according to claim 1, wherein: the outer end of the connecting channel (10) is provided with a mounting cover plate (11), and a through hole matched with the valve clack pin (5) is arranged in the middle of the mounting cover plate (11).
6. A stop valve with self-contained check function according to claim 1, wherein: a small sealing ring (12) is arranged on the valve clack pin (5).
7. A stop valve with self-contained check function according to claim 1, wherein: and a large sealing ring (13) is arranged at the joint of the valve rod (6) and the valve clack (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310267161.6A CN115978212B (en) | 2023-03-20 | 2023-03-20 | Stop valve with non-return function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310267161.6A CN115978212B (en) | 2023-03-20 | 2023-03-20 | Stop valve with non-return function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115978212A CN115978212A (en) | 2023-04-18 |
| CN115978212B true CN115978212B (en) | 2023-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310267161.6A Active CN115978212B (en) | 2023-03-20 | 2023-03-20 | Stop valve with non-return function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115978212B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117090525B (en) * | 2023-10-19 | 2024-01-05 | 牡丹江通用石油工具有限公司 | Grouting-free drilling tool check valve for pressure-controlled drilling |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204942646U (en) * | 2015-09-24 | 2016-01-06 | 永嘉县恒正阀门有限公司 | Can be used for the stop valve of non-return |
| CN112066048B (en) * | 2020-09-16 | 2022-09-16 | 山东威玛装备科技股份有限公司 | Slow-closing check valve |
| CN112161089B (en) * | 2020-09-20 | 2023-05-23 | 浙江东和阀门制造有限公司 | Waterproof hammer slow-closing check valve |
| CN213206668U (en) * | 2020-09-28 | 2021-05-14 | 上海艾维科阀门股份有限公司 | Stop check valve |
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2023
- 2023-03-20 CN CN202310267161.6A patent/CN115978212B/en active Active
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| Publication number | Publication date |
|---|---|
| CN115978212A (en) | 2023-04-18 |
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