CN213685500U - Float pilot-operated drain valve - Google Patents
Float pilot-operated drain valve Download PDFInfo
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- CN213685500U CN213685500U CN202022450639.3U CN202022450639U CN213685500U CN 213685500 U CN213685500 U CN 213685500U CN 202022450639 U CN202022450639 U CN 202022450639U CN 213685500 U CN213685500 U CN 213685500U
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Abstract
The utility model discloses a float guide formula flowing back valve belongs to oil gas field exploitation technical field, including cylinder body and float, install the piston that can reciprocate in the cylinder body, install downwardly extending's main valve needle on the piston, still set up the cavity passageway that runs through the piston on the main valve needle, and still install on the float and lead the needle with cavity passageway complex. The utility model discloses do not need additional any auxiliary power control system when enabling gas field water or crude oil discharge to can accomplish the production task as usual in the area that does not possess the electric power condition, and compare more portably, fault factor still less, environmental protection and energy saving more, construction investment and operation cost are lower for current electronic (or pneumatic) valve.
Description
Technical Field
The utility model belongs to the technical field of oil gas field exploitation, particularly, relate to a float guide's formula flowing back valve.
Background
In the production process of oil-gas field production and oil-gas treatment, the gas-liquid separator is used most commonly, the liquid (gas field water, crude oil and the like) separated by the separator needs to be discharged under the control of a certain liquid level, the existing method for discharging the liquid, gas field water or crude oil is to monitor the liquid level height through a liquid level sensor firstly, when the liquid level sensor monitors that the liquid level height is higher than the set liquid level height, the liquid level sensor transmits a signal to an electric (or pneumatic) valve, and the electric (or pneumatic) valve is opened after receiving the liquid level signal. However, for some well stations located in remote mountainous areas, the electric power supply is difficult to lay and extremely high in cost, so that some low-efficiency oil and gas well stations can only abandon the installation of electric (or pneumatic) valves for the purpose; even under electrical power conditions, electrical (or pneumatic) valves are not ambiguous in oil and gas production because well stations are often shut down due to electrical and electrical failures.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a float guide's formula flowing back valve does not need additional any auxiliary power control system when making gas field water or crude oil discharge to can accomplish the production task as one's appearance in the area that does not possess the electric power condition, and compare more portably, fault factor still less, environmental protection and energy saving more, construction investment and operation cost are lower for current electronic (or pneumatic) valve.
For realizing the purpose of the utility model, the technical proposal adopted is that: the float-guided liquid discharge valve includes cylinder body and float, in the described cylinder body a piston capable of moving up and down is mounted, on the piston and cylinder body a sliding seal fit a main valve needle which is downwards extended is mounted, on the main valve needle a hollow channel which is passed through the piston is set, and the bottom portion of the float is equipped with a guide valve needle, and on the cylinder body a hole for guide valve needle to pass through is set, and the guide valve needle and said hole are formed into a gap channel.
Furthermore, a pilot valve cavity is formed between the piston and the cylinder body, and a compression spring is arranged in the pilot valve cavity.
Furthermore, a sealing structure is further installed on the outer circular surface of the piston.
Further, the sealing structure is one of a sealing ring, a piston ring or a clearance sealing fit.
Further, the piston is cylindrical, and the upper end of the main valve needle penetrates through the bottom surface of the piston and extends upwards.
Furthermore, the lower ends of the main valve needle and the pilot valve needle are respectively provided with an inverted conical plugging head.
Furthermore, a pilot valve seat matched with the pilot valve needle is further installed on the main valve needle.
Further, still include the valve casing and set up inlet, the leakage fluid dram on the valve casing, and have the main valve chamber in the valve casing, cylinder body and float are all installed in the main valve intracavity.
Furthermore, a main valve is further installed at the liquid discharge port, and the main valve needle is matched with the main valve seat.
Furthermore, the top of the valve shell is also provided with a float chamber communicated with the main valve cavity; the floater is arranged in the floater chamber, and the top of the floater chamber is provided with a gas phase communicating port.
The utility model has the advantages that,
the utility model discloses do not need additional any auxiliary power control system when enabling gas field water or crude oil discharge to can accomplish the production task as usual in the area that does not possess the electric power condition, and compare more portably, fault factor still less, environmental protection and energy saving more, construction investment and operation cost are lower for current electronic (or pneumatic) valve.
Drawings
Fig. 1 is a schematic structural view of a float-guided drain valve provided by the present invention.
Reference numbers and corresponding part names in the drawings:
1. liquid inlet, 2, valve shell, 3, main valve cavity, 4, float chamber, 5, gas phase communication port, 6, float, 7, guide valve needle, 8, cylinder, 9, guide valve cavity, 10, compression spring, 11, sealing structure, 12, piston, 13, main valve needle, 14, main valve seat, 15, liquid discharge port, 16, gap channel, 17, hollow channel, 18, guide valve seat, 19, chamber channel, 20, cylinder connecting piece.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the utility model provides a float-guided drain valve, which comprises a valve housing 2, a liquid inlet 1 and a liquid outlet 15, wherein the liquid inlet 1 and the liquid outlet are arranged on the valve housing 2; the valve shell 2 is internally provided with a main valve cavity 3, a cylinder 8 is arranged in the main valve cavity 3, and the cylinder 8 is fixedly arranged in the main valve cavity 3 through a cylinder connecting piece 20; the top of the valve shell 2 is also provided with a float chamber 4 communicated with the main valve cavity 3, and a cavity passage 19 is also arranged between the float chamber 4 and the main valve cavity 3; the floater 6 is suspended in the floater chamber 4, the top of the floater chamber 4 is provided with a gas phase communication port 5, and the floater 6 is suspended in the floater chamber 4; the piston 12 can move up and down in the cylinder 8, a valve guide cavity 9 is formed between the piston 12 and the inner top surface of the cylinder 8, and the compression spring 10 is installed in the valve guide cavity 9.
The piston 12 is cylindrical, a sealing structure 11 is arranged on the outer cylindrical surface of the piston 12 to seal and separate the pilot valve cavity 9 from the main valve cavity 3, a main valve needle 13 is arranged in the center of the piston 12, and the piston 12 and the main valve needle 13 are fixed with each other or can be combined into a whole.
A main valve needle 13 extending downwards is mounted on the piston 12, a hollow passage 17 penetrating through the piston 12 is further formed in the main valve needle 13, that is, the main valve needle 13 is hollow, the hollow part of the main valve needle 13 is the hollow passage 17, and a pilot valve seat 18 is mounted at the upper end of the main valve needle 13.
The lower end of the float 6 is connected with a pilot valve needle 7, the pilot valve needle 7 penetrates through a hole in the top of the cylinder 8 to extend into the pilot valve cavity 9, and the pilot valve needle 7 and an opening hole in the top of the cylinder 8 form a clearance channel 16.
The pilot valve needle 7 and the pilot valve seat 18 are matched to realize the switching function of the pilot valve. The bottoms of the pilot valve needle 7 and the main valve needle 13 can be conical surfaces or spherical surfaces, so that the pilot valve needle 7 and the main valve needle 13 are in line contact when plugging is carried out, a strong hard seal is formed, and the opening and closing effectiveness of the valve is enhanced.
The external mounting conditions of the float-guided drain valve provided in this embodiment are: the liquid inlet 1 is connected with a liquid outlet of an external separator (or other similar container equipment), and the gas-liquid communication port 5 is communicated with a gas phase area at the top of the separator (or other similar container equipment), so that the separator and the float pilot type liquid discharge valve form a communicating vessel. The theoretical float chamber level is substantially the same as the separator (or other similar vessel equipment) level.
In the initial condition, the float chamber 4 is in a low level, the float 6 and the pilot valve needle 7 are under gravity pressing down on the pilot valve seat 18, and the pilot valve is in a closed state. Similarly, the main valve needle 13 is pressed against the main valve seat 14 by the combined action of the preload of the compression spring 10 and the combined action of the gravity of the float 6, the pilot valve needle 7, the piston 12, and the like, and the main valve is in a closed state.
As the level of the float chamber 4 rises with the level of the external device (separator or other similar container device), the float is subjected to an increase in buoyancy. When the buoyancy is larger than the sum of the self weight of the relevant parts and the acting force of the pressure difference at the position of the pilot valve seat 18 on the pilot valve needle 7, the floater 6 moves upwards together with the pilot valve needle 7, the pilot valve needle 7 leaves the pilot valve seat 18 to open the pilot valve, liquid enters the pilot valve cavity 9 from the main valve cavity 3 through the gap channel 16 and is discharged out of the valve body through the pilot valve seat 18, the hollow channel 17 and the liquid discharge port 15. According to the theory of fluid mechanics, when liquid flows through the clearance passage 16, a differential pressure Δ P is generated, which is the differential pressure between the main valve chamber 3 and the pilot valve chamber 9, the piston 12 generates an upward thrust under the action of the differential pressure Δ P, when the upward thrust is greater than the sum of the compression force of the compression spring 10 and the gravity of the relevant parts, the piston 12 drives the main valve needle 13 to move upwards to separate from the main valve seat 14 to open the main valve, and a large amount of liquid is discharged from the main valve chamber 3 through the main valve seat 14 and the liquid discharge port 15 out of the valve body. Thus, the one-time opening process of the float-guided drainage valve is completed.
When the liquid level of the float chamber 4 is reduced along with the liquid level of the external equipment (a separator or other similar container equipment), the float 6 drives the guide valve needle 7 to descend until the guide valve needle contacts with the guide valve seat 18 to close the guide valve, the flow of the liquid in the gap channel 16 is blocked, the pressure difference delta P =0, the upward thrust of the piston 12 is lost, and the piston 12 drives the main valve needle to move downwards until the main valve is closed under the action of the compression force of the compression spring 10 and the gravity. This completes the one-time closing of the float-guided drain valve.
The automatic liquid discharge work of the float guide type liquid discharge valve is realized in cycles.
Example 2
In this embodiment 2, a float-guided drain valve is provided, which can be directly installed inside a separator (or a container device requiring liquid drainage, hereinafter, referred to as a separator) in a built-in manner, in this case, the separator housing also serves as the valve housing 2 of the float-guided drain valve provided in embodiment 1, the volumetric airspace inside the separator also serves as the main valve chamber 2 and the float chamber 4 of the valve, the separator drain port also serves as the drain port 15 of the valve, and the gas phase communication port 5 is eliminated, and other structural members are the same as those of the float-guided drain valve provided in embodiment 1.
In the initial condition, the separator liquid level is in a low position, the float 6 and the pilot valve needle 7 are under gravity pressing down on the pilot valve seat 18, the pilot valve being in a closed state. Similarly, the main valve needle 13 is pressed against the main valve seat 14 by the combined action of the preload of the compression spring 10 and the combined action of the gravity of the float 6, the pilot valve needle 7, the piston 12, and the like, and the main valve is in a closed state.
When the liquid level in the separator rises, the float is subjected to an increase in buoyancy. When the buoyancy is larger than the sum of the self weight of the related parts and the acting force of the pressure difference at the position of the pilot valve seat 18 on the pilot valve needle 7, the floater 6 moves upwards together with the pilot valve needle 7, the pilot valve needle 7 leaves the pilot valve seat 18 to open the pilot valve, liquid enters the pilot valve cavity 9 from the separator through the clearance channel 16 and is discharged out of the valve body through the pilot valve seat 18, the hollow channel 17 and the liquid discharge port 15. According to the theory of fluid mechanics, when liquid flows through the clearance passage 16, a pressure difference Δ P is generated, the pressure difference is the pressure difference between the main valve chamber 3 and the pilot valve chamber 9, the piston 12 generates an upward thrust under the action of the pressure difference Δ P, when the upward thrust is larger than the sum of the compression force of the compression spring 10 and the gravity of related parts, the piston 12 drives the main valve needle 13 to move upwards to separate from the main valve seat 14 to open the main valve, and a large amount of liquid is discharged from the separator through the main valve seat 14 and the liquid discharge port 15 out of the valve body. Thus, the one-time opening process of the float-guided drainage valve is completed.
When the liquid level of the separator (or other similar container equipment) is lowered, the float 6 drives the pilot valve needle 7 to descend until the pilot valve needle contacts with the pilot valve seat 18 to close the pilot valve, the pilot valve is blocked from flowing, the liquid flow in the clearance channel 16 is 0, the pressure difference delta P =0, the upward thrust of the piston 12 is lost, and under the action of the compression force of the compression spring 10 and the gravity, the piston 12 drives the main valve needle to move downwards until the main valve is closed. This completes the one-time closing of the float-guided drain valve.
The automatic liquid discharge work of the float guide type liquid discharge valve is realized in cycles.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A float-guided liquid discharge valve is characterized by comprising a cylinder body (8) and a float (6), wherein a piston (12) capable of moving up and down is installed in the cylinder body (8), and the piston (12) is in sliding sealing fit with the cylinder body (8); a valve guide cavity (9) is formed between the piston (12) and the cylinder body (8), and a compression spring (10) is installed in the valve guide cavity (9); a main valve needle (13) extending downwards is mounted on the piston (12), a pilot valve seat (18) matched with the pilot valve needle (7) is further mounted at the top of the main valve needle (13), and a hollow channel (17) penetrating through the piston (12) is further formed in the main valve needle (13); the bottom of the floater (6) is provided with a guide valve needle (7), the cylinder body (8) is also provided with a hole for the guide valve needle (7) to penetrate through, and the guide valve needle (7) and the hole form a clearance channel (16).
2. Float-guided drain valve according to claim 1, characterized in that a sealing structure (11) is further mounted on the outer circumferential surface of the piston (12).
3. Float-guided drain valve according to claim 2, characterized in that the sealing structure (11) is one of a sealing ring, a piston ring or a clearance seal fit.
4. The float-guided drain valve according to claim 1, wherein the piston (12) has a cylindrical shape, and an upper end of the main needle (13) extends upward through a bottom surface of the piston (12).
5. Float-guided drain valve according to claim 1, characterized in that the main needle (13) and the pilot needle (7) each have at their lower end an inverted conical closure head.
6. The float-guided drain valve according to any one of claims 1 to 5, further comprising a valve housing (2) and a liquid inlet (1) and a liquid outlet (15) which are provided on the valve housing (2), wherein the valve housing (2) has a main valve cavity (3) therein, and the cylinder (8) and the float (6) are both mounted in the main valve cavity (3).
7. Float-guided drain valve according to claim 6, characterized in that a main valve seat (14) is mounted at the drain port (15) and a main valve needle (13) engages with the main valve seat (14).
8. The float-guided drain valve according to claim 6, characterized in that the top of the valve housing (2) is opened with a float chamber (4) communicating with the main valve chamber (3); the floater (6) is arranged in the floater chamber (4), and the top of the floater chamber (4) is provided with a gas phase communicating port (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022450639.3U CN213685500U (en) | 2020-10-29 | 2020-10-29 | Float pilot-operated drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022450639.3U CN213685500U (en) | 2020-10-29 | 2020-10-29 | Float pilot-operated drain valve |
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| Publication Number | Publication Date |
|---|---|
| CN213685500U true CN213685500U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022450639.3U Active CN213685500U (en) | 2020-10-29 | 2020-10-29 | Float pilot-operated drain valve |
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| CN (1) | CN213685500U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670394A (en) * | 2021-08-12 | 2021-11-19 | 河北工大科雅能源科技股份有限公司 | Metering management and control device for wide-range self-adjusting instrument parameters |
-
2020
- 2020-10-29 CN CN202022450639.3U patent/CN213685500U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113670394A (en) * | 2021-08-12 | 2021-11-19 | 河北工大科雅能源科技股份有限公司 | Metering management and control device for wide-range self-adjusting instrument parameters |
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