CN211288878U - Structure for preventing valve rod sealing ring from falling off - Google Patents
Structure for preventing valve rod sealing ring from falling off Download PDFInfo
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- CN211288878U CN211288878U CN201922337020.9U CN201922337020U CN211288878U CN 211288878 U CN211288878 U CN 211288878U CN 201922337020 U CN201922337020 U CN 201922337020U CN 211288878 U CN211288878 U CN 211288878U
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- valve rod
- sliding sleeve
- sealing ring
- valve
- sealing
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Abstract
The utility model discloses a structure for preventing a valve rod sealing ring from falling off, which comprises a valve rod (3), wherein the front end of the valve rod (3) is provided with a sealing groove, and a sealing ring (1) is arranged in the sealing groove; a sliding sleeve (4) is sleeved outside the valve rod (3); a sliding sleeve hole (7) is formed in the front end of the sliding sleeve (4), and a sealing ring (1) in the front end of the valve rod (3) penetrates through the sliding sleeve hole (7) and extends into a valve port (8) of the joint (2); a waist-shaped hole (9) is arranged on the sliding sleeve (4); a pin (6) is arranged on the valve rod (3), and the pin (6) is in sliding connection with a kidney-shaped hole (9) on the sliding sleeve (4); a spring (5) is arranged between the valve rod (3) and the sliding sleeve (4). The utility model discloses sealing washer on the valve rod remains compression state throughout, has solved the problem that the sealing washer is deviate from in the valve rod seal groove, has improved the suitability and the reliability of instrument.
Description
Technical Field
The utility model relates to a prevent structure that valve rod seal circle drops belongs to oil well liquid level degree of depth test equipment technical field.
Background
The wellhead connector is a device for sounding and receiving sound waves for oil well liquid level testing in an oil field oil extraction process. The depth of the liquid level of the oil well can be calculated through receiving and processing the sound waves, and a mechanism for generating the sound waves in a well head connector is a sound source control valve. The sound source control valve isolates the air chamber from the sleeve through the valve rod, the limiting pull rod of the valve rod is opened during testing, the valve rod axially moves under the action of spring force and gas pressure, and pulse sound signals are emitted by utilizing the pressure difference between the air chamber and the sleeve. The pressure range of the conventional oil well casing pressure is (0-10 MPa). A valve rod of the sound source control valve is generally sealed by a sealing ring, and when the sound source control valve is triggered, the valve rod is rapidly moved out of a valve opening. When the air pressure of the sleeve exceeds 5MPa, the sealing ring on the valve rod falls off from the sealing groove; when the pressure is higher, the sealing ring is even broken, so that the valve rod cannot reset and seal, and the instrument cannot work normally.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a prevent structure that valve rod seal circle drops to solve the problem that the sealing washer is deviate from in the valve stem seal groove, and improve the suitability and the reliability of instrument, thereby overcome prior art's not enough.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a structure for preventing a valve rod sealing ring from falling off, which comprises a valve rod, wherein the front end of the valve rod is provided with a sealing groove, and a sealing ring is arranged in the sealing groove; a sliding sleeve is sleeved outside the valve rod; the front end of the sliding sleeve is provided with a sliding sleeve hole, and a sealing ring at the front end of the valve rod penetrates through the sliding sleeve hole and extends into a valve port of the joint; a waist-shaped hole is arranged on the sliding sleeve; the valve rod is provided with a pin which is in sliding connection with a waist-shaped hole on the sliding sleeve; a spring is arranged between the valve rod and the sliding sleeve.
Since the technical scheme is used, the utility model discloses sealing washer on the valve rod remains compression state throughout, has solved the problem that the sealing washer is deviate from in the valve rod seal groove, has improved the suitability and the reliability of instrument.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram of the application position of the present invention;
fig. 3 is a schematic diagram of an application of the prior art.
In the drawings are labeled: 1-sealing ring, 2-joint, 3-valve rod, 4-sliding sleeve, 5-spring, 6-pin, 7-sliding sleeve hole, 8-valve port, 9-kidney-shaped hole, 10-air chamber, 11-valve port end face and 12-existing valve rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The utility model is formed according to the following method for preventing the valve rod sealing ring from falling off, as shown in figure 1 and figure 2, the method is that a sliding sleeve 4 is sleeved outside a valve rod 3, and one end of the sliding sleeve 4 is provided with a sliding sleeve hole 7 with the same inner diameter as that of a valve port 8; when in percussion, after the sealing ring 1 at the end part of the valve rod 3 is withdrawn from the valve port 8, the sealing ring firstly enters the sliding sleeve hole 7, then the valve rod 3 and the sliding sleeve 4 synchronously move towards the direction of the air chamber 10 and break away from the end surface 11 of the valve port to percussion the sound source control valve; because whole percussion process sealing washer 1 is in compression state all the time, prevent that high-pressure gas from extruding or blowing apart sealing washer 1 from the seal groove of valve rod 3 tip.
The structure of the present invention for preventing the valve rod sealing ring from falling off, which is constructed according to the above method and is used for the above method, as shown in fig. 1 and fig. 2, comprises a valve rod 3, wherein the front end of the valve rod 3 is provided with a sealing groove, and a sealing ring 1 is arranged in the sealing groove; a sliding sleeve 4 is sleeved outside the valve rod 3; the front end of the sliding sleeve 4 is provided with a sliding sleeve hole 7, and the sealing ring 1 at the front end of the valve rod 3 passes through the sliding sleeve hole 7 and extends into a valve port 8 of the joint 2; a waist-shaped hole 9 is arranged on the sliding sleeve 4; a pin 6 is arranged on the valve rod 3, and the pin 6 is in sliding connection with a waist-shaped hole 9 on the sliding sleeve 4; a spring 5 is arranged between the valve rod 3 and the sliding sleeve 4.
Examples
This example is an improvement over the prior art, the existing sound source control valve being shown in fig. 3. The acoustic source control valve pneumatically isolates the air chamber 10 from the sleeve at the forward end of the connector 2 by means of the existing valve stem 12. During testing, a limit pull rod (not shown) of the existing valve rod 12 is opened, the existing valve rod 12 axially moves under the action of spring force and gas pressure, and a pulse sound signal is emitted by using the pressure difference between the air chamber 10 and the sleeve. The pressure range of the conventional oil well casing pressure is (0-10 MPa). A valve rod of the sound source control valve is generally sealed by an O-shaped sealing ring, and when the sound source control valve is triggered, the valve rod is rapidly moved out of a valve opening. When the air pressure of the sleeve exceeds 5MPa, the O-shaped sealing ring on the valve rod falls off from the sealing groove; when the pressure is higher, the O-shaped sealing ring is even broken, so that the valve rod cannot reset and seal, and the instrument cannot work normally.
The sound source control valve of this example after modification is shown in fig. 1 and 2. The improvement method is that a sliding sleeve 4 is sleeved outside a valve rod 3, and one end of the sliding sleeve 4 is provided with a sliding sleeve hole 7 with the same inner diameter as that of a valve port 8; when the sound source control valve is triggered, after a sealing ring 1 (the existing O-shaped sealing ring is still adopted, and the sealing rings are all referred to as O-shaped sealing rings) at the end part of a valve rod 3 exits from a valve port 8, the sealing ring enters a sliding sleeve hole 7, then the valve rod 3 and a sliding sleeve 4 synchronously move towards an air chamber 10 and break away from a valve port end face 11 to trigger the sound source control valve; because whole percussion process sealing washer 1 is in compression state all the time, prevent that high-pressure gas from extruding or blowing apart sealing washer 1 from the seal groove of valve rod 3 tip.
The concrete structure is shown in figure 1. The valve comprises a valve rod 3, wherein a sealing groove is formed in the front end of the valve rod 3, and a sealing ring 1 is arranged in the sealing groove; a sliding sleeve 4 is sleeved outside the valve rod 3; the front end of the sliding sleeve 4 is provided with a sliding sleeve hole 7, and the sealing ring 1 at the front end of the valve rod 3 passes through the sliding sleeve hole 7 and extends into a valve port 8 of the joint 2; a waist-shaped hole 9 is arranged on the sliding sleeve 4; a pin 6 is arranged on the valve rod 3, and the pin 6 is in sliding connection with a waist-shaped hole 9 on the sliding sleeve 4; a spring 5 is arranged between the valve rod 3 and the sliding sleeve 4.
The utility model discloses a working process and principle as follows:
firstly, the spring 5 is put into the sliding sleeve 4, and then the end of the valve rod 3 provided with the sealing ring 1 penetrates through the spring 5 and the sliding sleeve hole 7 of the sliding sleeve 4. Rotating the valve rod 3 aligns the pin hole on the valve rod 3 with the slotted hole 9 on the sliding sleeve 4, and then the pin 6 passes through the slotted hole 9 on the sliding sleeve 4 and the pin hole on the valve rod 3. So that the valve stem 3 can slide axially in the sliding sleeve 4. The sliding travel is determined by the slotted hole 9. After the installation, the spring 5 has a certain pretightening force when the pin 6 is pressed against the right end face of the waist-shaped hole 9 on the sliding sleeve 4.
When the sealing ring 1 at the front end of the valve rod 3 is positioned in the valve port 8 of the joint 2 and is in a sealing state, the left end surface of the sliding sleeve 4 is attached to the valve port end surface 11 under the action of the spring 5, and the spring 5 is in a compression state at the moment. When the sound source control valve is opened, the valve rod 3 moves rightwards under the action of spring force and casing gas pressure, the sealing ring 1 at the front end of the valve rod 3 firstly enters the sliding sleeve hole 7 of the sliding sleeve 4 after exiting from the valve port 8, and the size of the sliding sleeve hole 7 is the same as that of the valve port 8, so that the sealing ring 1 is still in a compressed state after entering the sliding sleeve hole 7. After the two sealing rings 1 on the valve rod 3 completely enter the sliding sleeve hole 7, the pin 6 on the valve rod 3 pushes against the right end face of the waist-shaped hole 9 on the sliding sleeve 4 to drive the sliding sleeve 4 to move rightwards together, the left end face of the sliding sleeve 4 is separated from the valve port end face 11, and the sound source control valve is triggered.
The utility model discloses sealing washer on the valve rod remains compression state throughout, has solved the problem that the sealing washer is deviate from in the valve rod seal groove, has improved the suitability and the reliability of instrument.
Claims (1)
1. The utility model provides a prevent structure that valve rod sealing washer drops, includes valve rod (3), its characterized in that: a sealing groove is arranged at the front end of the valve rod (3), and a sealing ring (1) is arranged in the sealing groove; a sliding sleeve (4) is sleeved outside the valve rod (3); a sliding sleeve hole (7) is formed in the front end of the sliding sleeve (4), and a sealing ring (1) in the front end of the valve rod (3) penetrates through the sliding sleeve hole (7) and extends into a valve port (8) of the joint (2); a waist-shaped hole (9) is arranged on the sliding sleeve (4); a pin (6) is arranged on the valve rod (3), and the pin (6) is in sliding connection with a kidney-shaped hole (9) on the sliding sleeve (4); a spring (5) is arranged between the valve rod (3) and the sliding sleeve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922337020.9U CN211288878U (en) | 2019-12-24 | 2019-12-24 | Structure for preventing valve rod sealing ring from falling off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922337020.9U CN211288878U (en) | 2019-12-24 | 2019-12-24 | Structure for preventing valve rod sealing ring from falling off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211288878U true CN211288878U (en) | 2020-08-18 |
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ID=72022636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922337020.9U Active CN211288878U (en) | 2019-12-24 | 2019-12-24 | Structure for preventing valve rod sealing ring from falling off |
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| Country | Link |
|---|---|
| CN (1) | CN211288878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848427A (en) * | 2019-12-24 | 2020-02-28 | 贵州航天凯山石油仪器有限公司 | Method and structure for preventing valve rod sealing ring from falling off |
-
2019
- 2019-12-24 CN CN201922337020.9U patent/CN211288878U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848427A (en) * | 2019-12-24 | 2020-02-28 | 贵州航天凯山石油仪器有限公司 | Method and structure for preventing valve rod sealing ring from falling off |
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