Plug valve

Abstract

The utility model relates to a plug valve which comprises a valve body, a lower valve seat is arranged on the portion, close to the right side, of an inner cavity of the valve body, an upper valve seat is arranged on the left side of the lower valve seat and located on the portion, close to the left side, of the inner cavity of the valve body, a first O-shaped ring and a check ring are arranged on the edge of the outer side of the lower valve seat, and a second O-shaped ring and a check ring are arranged on the edge of the outer side of the upper valve seat. A ball core is jointly arranged between the lower valve seat and the upper valve seat, a switch is arranged at the top of the ball core, and a plane bearing is arranged at the position, close to the bottom, of the edge of the outer side of the switch. A low-friction-resistance structure is adopted, the switching torque of the plug valve can be effectively reduced, and low-torque switching of the plug valve in the pressure bearing state is achieved; therefore, the ball valve can be rotated by 90 degrees by rotating the cross joint through a special handle, opening and closing are achieved, blowout accidents are prevented, and use is convenient and reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plug valves, in particular to a plug valve. BACKGROUND

[0002] The square drill rod plug valve is one of effective tools for preventing blowout and mud loss in the drilling string circulation system, and is a manually controlled valve. SUMMARY

[0003] The utility model discloses a plug valve which solves the problems mentioned in the background.

[0004] The utility model discloses a plug valve, including the valve body, the lower valve seat is equipped with in the valve body inner chamber near right side, the upper valve seat is equipped with in the lower valve seat left side, the upper valve seat is located in the valve body inner chamber near left side, the first O type ring and the baffle ring are equipped with in the lower valve seat outside edge, the second O type ring and the baffle ring are equipped with in the upper valve seat outside edge, the ball core is equipped with between the lower valve seat and the upper valve seat, the switch is equipped with in the ball core top, the flat bearing is equipped with in the switch outside edge near bottom.

[0005] In one embodiment, the ball core outside edge is equipped with first hole card near left and right sides, the upper valve seat left side is equipped with the spliced ring, and the spliced ring left side is equipped with the support ring.

[0006] In one embodiment, the gasket is equipped between the spliced ring and the upper valve seat, and the second hole card is equipped on the spliced ring.

[0007] In one embodiment, the gasket right side is equipped with two springs.

[0008] In one embodiment, the switch outside edge is equipped with O type ring near top.

[0009] The utility model provides the beneficial effect is:

[0010] The utility model adopts low friction resistance structure, can effectively reduce the plug valve switch torque, realizes the low torque switch of plug valve under the state of bearing pressure, and the plug valve adopts the middle cross byte control ball valve, so that the cross byte is rotated 90 degrees by special handle, realizes opening and closing, prevents the occurrence of blowout accident, and is convenient and reliable to use. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1This is a front view of the present utility model;

[0012] Figure 2 This is a side view of the present invention.

[0013] In the attached diagram: 1. Valve body; 2. Lower valve seat; 3. Ball core; 4. Upper valve seat; 5. Switch; 6. Washer; 7. Joint ring; 8. Support ring; 9. First O-ring and retaining ring; 10. Spring; 11. O-ring; 12. First hole clamp; 13. Second O-ring and retaining ring; 14. Second hole clamp; 15. Surface bearing. Detailed Implementation

[0014] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0015] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0016] In one embodiment, such as Figure 1 , Figure 2 As shown, the plug valve includes a valve body 1. A lower valve seat 2 is located near the right side of the inner cavity of the valve body 1, and an upper valve seat 4 is located on the left side of the lower valve seat 2. The upper valve seat 4 is located near the left side of the inner cavity of the valve body 1. A first O-ring and a retaining ring 9 are provided on the outer edge of the lower valve seat 2, and a second O-ring and a retaining ring 13 are provided on the outer edge of the upper valve seat 4. A ball core 3 is provided between the lower valve seat 2 and the upper valve seat 4. A switch 5 is provided at the top of the ball core 3. A plane bearing 15 is provided near the bottom of the outer edge of the switch 5. A first hole clamp 12 is provided on both the left and right sides of the outer edge of the ball core 3. A splicing ring 7 is provided on the left side of the upper valve seat 4. A support ring 8 is provided on the left side of the splicing ring 7. A washer 6 is provided between the splicing ring 7 and the upper valve seat 4. A second hole clamp 14 is provided on the splicing ring 7. Two springs 10 are provided on the right side of the washer 6. An O-ring 11 is provided near the top of the outer edge of the switch 5.

[0017] The valve body 1 and each part need to be assembled after passing the inspection, each part of the valve core is cleaned and coated with neutral rust-proof oil, and is assembled into the valve body 1 according to the requirements. When the hydraulic shell test is performed, the valve needs to be in a semi-closed state, the low pressure is 1.7 MPa, the high pressure is greater than or equal to 68.9 MPa, the initial pressure is kept for 3 minutes, the pressure is released to 0, and the final pressure is kept for greater than or equal to 10 minutes. The high and low pressures are tested respectively, and no leakage phenomenon should be observed. When the lower working pressure test is performed, the valve needs to be in a closed state, the low pressure is 1.7 MPa, the high pressure is greater than or equal to 68.9 MPa, and the pressure keeping time is greater than or equal to 5 minutes. During this period, no leakage phenomenon should be observed. After the high pressure test, the pressure in the empty cavity is released, and the product action and sealing should be intact.

[0018] The ball valve is supported and positioned by the upper and lower ball seats and the spring 10. The spring force makes the ball valve and the ball seat have a certain pre-tightening force. When the ball valve is in an open state, the drilling fluid passes through the faucet valve water eye without obstruction. When it is closed, the ball surface completely seals the water eye, and the inner annular portion pressure acts on the ball valve, so that the ball valve and the valve seat are in a high-pressure sealing state, thereby realizing the safety protection effect.

[0019] Working principle: when starting to use, first check whether the threads of the upper and lower joints meet the requirements, pay attention to whether the "open" and "close" marked on the valve body 1 of the faucet valve of the kelly bar are consistent with the actual "open" and "close" positions of the ball valve and whether they are effective. The faucet valve should be subjected to a hydrostatic test under the rated working pressure. When well kick or blowout occurs in the well, the upper or lower faucet valve of the kelly bar should be closed nearby. When well kick or blowout occurs, the upper faucet valve should be closed first, and then the kelly bar is lifted to close the blowout preventer, so that the water hose is prevented from being broken. If the kelly bar back pressure valve fails or the upper faucet valve is not closed, the lower faucet valve can be closed. Before the kelly bar is removed, the lower faucet valve should be closed to prevent the drilling fluid from splashing on the drilling platform. During use, to ensure the flexibility of the ball valve, the faucet valve should be opened and closed regularly (every three days) to prevent the ball valve from being stuck. After use, the faucet valve should be washed and subjected to non-destructive testing, pressure sealing test and pressure opening and closing test. The ball valve of the product that passes the test is stored in a ventilated and dry place after being coated with rust-proof and corrosion-resistant grease at both ends. If one of the non-destructive testing and pressure sealing test and pressure opening and closing test is unqualified, the faucet valve must be disassembled and replaced with parts, and then retested after assembly. During transportation, attention should be paid to protect the threads.

[0020] Any combination of the technical features of the above-described embodiments can be made, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combination of the technical features does not exist, it should be considered as the scope of the description.

[0021] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A stopcock valve characterised in that, Including the valve body (1), the lower valve seat (2) is equipped with near the right side in the cavity of the valve body (1), the upper valve seat (4) is equipped with left side of the lower valve seat (2), the upper valve seat (4) is located in the cavity of the valve body (1) near the left side, the outer edge of the lower valve seat (2) is equipped with the first O ring and the retainer ring (9), the outer edge of the upper valve seat (4) is equipped with the second O ring and the retainer ring (13), the lower valve seat (2) and the upper valve seat (4) are jointly provided with the ball core (3), the top of the ball core (3) is equipped with the switch (5), the outer edge of the switch (5) is equipped with the plane bearing (15) near the bottom.

2. The stopcock valve of claim 1, wherein The outer edge of the ball core (3) is equipped with the first hole card (12) near the left and right sides, the left side of the upper valve seat (4) is equipped with the spliced ring (7), the left side of the spliced ring (7) is equipped with the support ring (8).

3. The stopcock valve of claim 2, wherein, The spliced ring (7) and the upper valve seat (4) are jointly provided with the gasket (6), the second hole card (14) is arranged on the spliced ring (7).

4. The stopcock valve of claim 3, wherein, The right side of the gasket (6) is equipped with two springs (10).

5. The stopcock valve of claim 1, wherein The outer edge of the switch (5) is equipped with the O ring (11) near the top.

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