Double-turn-off and double-turn-off and discharging device
By introducing pressure sensors and PLC controllers into large-diameter double-block and relief devices, automatic adjustment and sealing connection of the valve stem are achieved, solving the problems of bulky structure and frequent leakage of existing large-diameter double-block valve groups, and achieving automatic adjustment and sealing reliability under high-pressure environments.
Patent Information
- Application Number
- CN202422773679.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-11-14
AI Technical Summary
Existing large-diameter double-off and double-break valve groups have a bulky structure, many leakage points, are not convenient for automatic adjustment, are expensive, and cannot be used in high-pressure environments.
It adopts double-off and double-break and relief devices, uses pressure sensors and PLC controllers to achieve automatic adjustment of the valve stem, has a compact structure, uses two identical valve bodies for sealing connection, and is suitable for large-caliber occasions.
It realizes automatic adjustment and sealing reliability in large-caliber occasions, reduces leakage, prolongs service life, and is suitable for pressure environments above 600 pounds.
Smart Images
Figure CN223434775U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wellhead device and Christmas tree equipment technical field, especially a double -double break and release device of large -diameter. BACKGROUND
[0002] At present, ball valve is widely used in chemical industry, petroleum, power generation and other industries due to the characteristics of quick opening and closing, simple structure, reliable sealing, convenient maintenance and the like. In recent years, with the development of materials and manufacturing technology, small and medium diameter ball valves cannot meet the needs of market development.
[0003] The traditional double -double break valve group is usually composed of three valves and three -way pipes, and has the problems of large structure, many leakage points, inconvenience for automatic adjustment, long production cycle and high cost of large -diameter double -double break valve group, and is not suitable for working temperature -29 DEG C ~ 121 DEG C, pressure greater than or equal to 600 pound working place.
[0004] Therefore, we develop a double -double break and release device to solve the above problems. INVENTION CONTENTS
[0005] The utility model discloses a double -double break and release device, which has the advantages of automatic adjustment, compact structure, reliable sealing, long service life and suitability for large -diameter occasions.
[0006] To achieve the above object, the utility model adopts the technical scheme that a double -double break and release device, including a first device body and a second device body, the first device body with the second device body between through the middle connecting body fixed connection, the bottom of the middle connecting body is equipped with a release hole, the first device body is equipped with a valve body, one end of the valve body is fixed connection one end connecting body, and the other end is fixed connection with the middle connecting body, the top of the valve body is inserted a valve rod, the valve rod is through the gland flange pressure joint one packing ring, the top of the gland flanne is pressure joint sealing a connecting branch board, the top of the connecting branch board is fixed connection a standard flange interface dish, the connecting branch board with the valve rod is through sliding bearing sliding connection, the top of the valve rod is through drive motor fixed connection a controller, and the bottom is inserted a ball, the central position of the end connecting body is equipped with a first passageway, the central position of the ball is equipped with a cavity, the middle position of the middle connecting body is equipped with a second passageway, the inner wall of the release hole is equipped with pressure sensor, the pressure sensor with the controller electric connection, the end connecting body, the middle connecting body respectively with the ball between pressure joint a valve seat.
[0007] Preferably, the outer wall of the packing ring is sequentially provided with a convex stop and an outer ring groove from top to bottom, the bottom end of the gland flange is provided with a first stepped groove, the middle position of the top end of the valve body is provided with a second stepped groove, a first sealing gasket is pressed between the first stepped groove and the convex stop, a second sealing gasket is pressed between the convex stop and the second stepped groove, and a first O-shaped ring is pressed between the outer ring groove and the valve body.
[0008] Preferably, the inner wall of the packing ring is provided with a plurality of inner ring grooves, and a second O-shaped ring is pressed between the inner ring grooves and the valve rod.
[0009] Preferably, one end of the valve seat is provided with a first ring groove, and the middle position is abutted against a compression spring through an abutting hole, and a sealing ring is sealed and pressed between the first ring groove and the ball.
[0010] Preferably, the sealing ring is provided with a first taper surface and a second taper surface at a corner.
[0011] Preferably, the inner wall of the other end of the valve seat is sequentially provided with a third ring groove and a fourth ring groove from outside to inside, and a third O-shaped ring is pressed in the third ring groove.
[0012] Preferably, the outer wall of one end of the middle connecting body is provided with a first U-shaped groove and a second U-shaped groove, a first sealing ring is pressed between the first U-shaped groove and the valve body, and a second sealing ring is pressed between the second U-shaped groove and the valve body.
[0013] Preferably, one end of the valve body is provided with a first blind hole, one end of the middle connecting body is provided with a second blind hole, and the first blind hole and the second blind hole are inserted through a pin shaft.
[0014] Preferably, the bottom end of the valve rod and the top end of the ball are pressed through a third blind hole to press a first spring, and the bottom end of the valve rod and the side wall of the valve body are pressed to press a second spring.
[0015] Preferably, the bottom end of the gland flange is provided with a sunken groove, the bottom end of the connecting branch plate is provided with a convex column, and graphite packing is pressed between the sunken groove and the convex column.
[0016] Compared with the prior art, the utility model has the following advantages due to the use of the above technical scheme:
[0017] The double-acting and double-breaking and relief device, the pressure sensor adjusts the rotation of the valve rod through the PLC controller to realize the automatic adjustment and cutting of the channel; the first device body and the second device body only need two same structures, so that the structure becomes compact; two valve bodies are used for sealing connection, the reliability of sealing is improved, and leakage is reduced; and the device is particularly suitable for large-diameter occasions, and the service life is prolonged under the condition that the pressure is greater than or equal to 600 pounds. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 The structure diagram of the double-connection double-break and relief device is shown in the utility model.
[0019] Figure 2 The utility model Figure 1 The enlarged view of A in the utility model.
[0020] Figure 3 The utility model Figure 1 The enlarged view of B in the utility model. DETAILED DESCRIPTION
[0021] The utility model will be explained in further detail in combination with the drawings and specific embodiments.
[0022] Figures 1 to 3 A double-connection double-break and relief device, comprising a first device body and a second device body, the first device body and the second device body are fixedly connected through a middle connecting body 3, the structure size of the first device body and the second device body is same, a relief hole 30 is arranged at the bottom end of the middle connecting body 3, the first device body is provided with a valve body 1, and a chromium plating layer is arranged on the inner wall of the valve body 1. One end of the valve body 1 is fixedly connected with an end connecting body 2, and the other end is fixedly connected with the middle connecting body 3, a valve rod 6 is inserted into the top end of the valve body 1, the valve rod 6 is press-connected with a packing ring 8 through a gland flange 7, the top end of the gland flange 7 is press-connected with a sealing connecting plate 9, the top end of the connecting plate 9 is fixedly connected with a standard flange connecting disc 103, and the standard flange connecting disc 103 locks the driving device when the valve rod does not need to rotate. The connecting plate 9 and the valve rod 6 are slidingly connected through a sliding bearing 11, the top end of the valve rod 6 is fixedly connected with a controller 200 through a driving motor, and the bottom end is inserted with a ball 4, the controller 200 is a PLC controller, and the driving motor is a servo motor. A first channel 101 is arranged at the central position of the end connecting body 2, a middle cavity 100 is arranged at the central position of the ball 4, a second channel 105 is arranged at the middle position of the middle connecting body 3, a pressure sensor 300 is arranged on the inner wall of the relief hole 30, the pressure sensor 300 is electrically connected with the controller 200, the end connecting body 2 and the middle connecting body 3 are press-connected with a valve seat 5 between the ball 4, and the through diameter of the first device body and the second device body is 600 mm.
[0023] The outer wall of the packing ring 8 is sequentially provided with a convex block 83 and an outer ring groove 85 from top to bottom, the inner wall of the packing ring 8 is provided with a plurality of inner ring grooves 81, the bottom end of the gland flange 7 is provided with a first stepped groove 701, the middle position of the top end of the valve body 1 is provided with a second stepped groove 15, the first stepped groove 701 and the convex block 83 are pressed and connected with a first sealing gasket 831, the convex block 83 and the second stepped groove 15 are pressed and connected with a second sealing gasket 832, and the outer ring groove 85 and the valve body 1 are pressed and connected with a first O-shaped ring. The inner ring groove 81 and the valve stem 6 are pressed and connected with a second O-shaped ring 82. The bottom end of the gland flange 7 is provided with a sunken groove 702, the bottom end of the connecting branch plate 9 is provided with a convex column 90, and the sunken groove 702 and the convex column 90 are pressed and connected with graphite packing 10. That is, the inner wall of the packing ring 8 is sealed and connected with the valve stem 6 through the second O-shaped ring 82, and the outer wall is sealed and connected with the valve body 1 through the first O-shaped ring, while the valve body 1, the gland flange 7 and the convex block 83 are sealed and connected with the first sealing gasket 831, and the gland flange 7 and the convex block 83 are sealed and connected with the second sealing gasket 832.
[0024] One end of the valve seat 5 is provided with a first ring groove 53, and the middle is abutted against the compression spring 57 through the abutment hole 34, the inner wall of the other end of the valve seat 5 is sequentially provided with a third ring groove 51 and a fourth ring groove 52 from outside to inside, and the first ring groove 53 and the ball 4 are sealed and connected with a sealing ring 55. One corner of the sealing ring 55 is provided with a first taper surface 551 and a second taper surface 552. The third ring groove 51 is connected with a third O-shaped ring 56. The first taper surface 551 and the second taper surface 552 improve the sealing performance of the sealing ring 55 and the ball 4. The bottom end of the valve stem 6 and the top end of the ball 4 are connected with a first spring 121 through a third blind hole, and are connected with a second spring 12 and the side wall of the valve body 1. The first spring 121 and the second spring 12 conduct the static electricity of the ball to the valve stem, then to the valve body, and finally to the ground. The first spring 121 also improves the sealing connection of the valve stem shoulder and the packing ring 8.
[0025] One end of the valve body 1 is provided with a first blind hole 19, one end of the middle connecting body 3 is provided with a second blind hole 31, the first blind hole 19 and the second blind hole 31 are inserted and connected through a pin shaft 109, which facilitates the positioning and assembly of the valve body and the end connecting body. The outer wall of one end of the middle connecting body 3 is provided with a first U-shaped groove 32 and a second U-shaped groove 33, the first U-shaped groove 32 is connected with a first sealing ring 221 and the valve body 1, and the second U-shaped groove 33 is connected with a second sealing ring 231 and the valve body 1.
[0026] The control method of the double-shut-off and double-break and relief device comprises the following steps:
[0027] S10. When the two balls 4 are fully open, the liquid medium flows through the first channel 101, the middle cavity 100, the second channel 105 of the first device body, the middle cavity 100 of the second device body, and the first channel 101 in sequence. When the pressure sensor 300 detects that the pressure in the second channel 105 is lower than 600 pounds, the PLC controller controls the rotation of the drive motor according to the signal of the pressure sensor. The drive motor drives the ball to rotate 90 degrees clockwise through the valve stem 6. At this time, the middle cavity 100 is cut off, thereby controlling the flow of the liquid medium.
[0028] S20. When the pressure sensor 300 detects that the pressure of the second channel 105 approaches 0, the PLC controller drives the motor to close the ball of the second device body. At this time, both ends of the second channel 105 are cut off, which is convenient for rapid cutoff, automatic control, and maintenance.
[0029] S 30. After maintenance, the central cavity 100 of the two spheres is rotated counterclockwise by 90 degrees through the controller, and the first channel 101, the central cavity 100, the second channel 105 of the first device body, the central cavity 100, and the first channel 101 of the second device body are connected, and the double-off and double-break and discharge devices work normally.
[0030] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.
Claims
1. A double-off and double-off and release device, characterized in that: The invention comprises a first device body and a second device body, wherein the first device body and the second device body are fixedly connected via a middle connector (3), a discharge hole (30) is provided at the bottom end of the middle connector (3), the first device body is provided with a valve body (1), one end of the valve body (1) is fixedly connected to the end connector (2), and the other end is fixedly connected to the middle connector (3), the top end of the valve body (1) is connected to a valve stem (6), the valve stem (6) is pressed to a packing ring (8) via a gland flange (7), the top end of the gland flange (7) is pressed to a sealing connection support plate (9), the top end of the connection support plate (9) is fixedly connected to a standard flange connection plate (103), the connection support plate (9) is fixedly connected to a standard flange connection plate (103), and the connection support plate (9) is fixedly connected to a standard flange connection plate (103). ) is slidably connected to the valve stem (6) through a sliding bearing (11), the top end of the valve stem (6) is fixedly connected to the controller (200) through a driving motor, and the bottom end is plugged into the ball (4), a first channel (101) is provided at the center position of the end connector (2), a middle cavity (100) is provided at the center position of the ball (4), a second channel (105) is provided at the middle position of the middle connector (3), a pressure sensor (300) is provided on the inner wall of the discharge hole (30), and the pressure sensor (300) is electrically connected to the controller (200), and the valve seat (5) is pressed between the end connector (2) and the middle connector (3) and the ball (4) respectively.
2. The double-off, double-break and release device according to claim 1, characterized in that: The outer wall of the packing ring (8) is provided with a cam (83) and an outer ring groove (85) in sequence from top to bottom, a first stepped groove (701) is provided at the bottom end of the pressure cover flange (7), and a second stepped groove (15) is provided at the middle position of the top end of the valve body (1), a first sealing gasket (831) is pressed between the first stepped groove (701) and the cam (83), a second sealing gasket (832) is pressed between the cam (83) and the second stepped groove (15), and a first O-ring is pressed between the outer ring groove (85) and the valve body (1).
3. The double-off and double-break and release device according to claim 2, characterized in that: A plurality of inner ring grooves (81) are provided on the inner wall of the packing ring (8), and a second O-ring (82) is press-connected between the inner ring groove (81) and the valve stem (6).
4. The double-off, double-break and release device according to claim 1, characterized in that: A first annular groove (53) is provided at one end of the valve seat (5), and a compression spring (57) is abutted in the middle through an abutment hole (34). A sealing ring (55) is sealed and pressed between the first annular groove (53) and the ball (4).
5. The double-off and double-break and discharge device according to claim 4, characterized in that: A first conical surface (551) and a second conical surface (552) are provided at a corner of the sealing ring (55).
6. The double-off and double-break and release device according to claim 4, characterized in that: A third annular groove (51) and a fourth annular groove (52) are sequentially provided on the inner wall of the other end of the valve seat (5) from the outside to the inside, and the third annular groove (51) is press-connected with a third O-ring (56).
7. The double-off, double-break and release device according to claim 1, characterized in that: A first U-shaped groove (32) and a second U-shaped groove (33) are provided on the outer wall of one end of the middle connecting body (3); the first U-shaped groove (32) and the valve body (1) are pressed together to form a first sealing ring (221); and the second U-shaped groove (33) and the valve body (1) are pressed together to form a second sealing ring (231).
8. The double-off and double-off and release device according to claim 7, characterized in that: A first blind hole (19) is provided at one end of the valve body (1), and a second blind hole (31) is provided at one end of the middle connecting body (3). The first blind hole (19) and the second blind hole (31) are plugged together via a pin shaft (109).
9. The double-off, double-break and release device according to claim 1, characterized in that: The bottom end of the valve stem (6) and the top end of the ball (4) are pressed together with a first spring (121) through a third blind hole, and are pressed together with a second spring (12) on the side wall of the valve body (1).
10. The double-off, double-break and discharge device according to claim 1, characterized in that: A recessed groove (702) is provided at the bottom end of the gland flange (7), a convex column (90) is provided at the bottom end of the connecting support plate (9), and a graphite filler (10) is pressed between the recessed groove (702) and the convex column (90).