Pressure regulating stop valve applied to oil field

Abstract

The utility model discloses a pressure regulating stop valve applied to an oil field. The pressure regulating stop valve comprises a valve body, a valve seat arranged in the valve body, a valve cover installed on the valve body, a valve rod installed on the valve cover in a sliding mode and a valve element installed at one end of the valve rod. A valve cavity is formed in the valve body, and an inlet channel and an outlet channel which are communicated with the valve cavity are formed in the valve body; the protecting bush is arranged on the valve body, is positioned at the inlet channel, prevents steam from scouring the valve core and plays a role in reducing pressure and noise; the sheath is provided with a plurality of small holes. The protective sleeve is installed in the inlet channel of the valve body, the small holes are formed in the protective sleeve, high-pressure steam entering the inlet channel is blocked, depressurized and reduced in noise through the protective sleeve, and the situation that the high-pressure steam directly impacts and scours the valve element and influences balance of the valve rod and the valve element is avoided; and meanwhile, the service life of the valve element is prevented from being affected by long-term high-pressure steam scouring.

Description

Technical Field

[0001] The utility model relates to a pressure regulating stop valve, in particular to a pressure regulating stop valve applied to oil fields. Background Art

[0002] In the prior art, after the oil in the oil well is initially pumped out, a large part of the oil still remains in the soil and cannot be pumped out directly. Currently, basically, steam is flushed into the oil well, and then the steam flushes the oil well and the soil in the oil well to flush out the oil remaining in the soil and then pump out the oil; if directly flushing through the steam pipeline, the steam pressure is too high, and a pressure regulating stop valve needs to be installed on the steam computer to adjust the steam pressure before introducing it into the oil well to flush the oil well. However, the existing pressure regulating stop valve is continuously flushed by high-pressure steam during use. When the steam enters the valve body, it directly impacts and flushes the valve core and the valve stem, which will affect the balance of the valve core and the valve stem and cause relatively loud noise. At the same time, long-term direct flushing easily causes damage to the valve core, resulting in a low service life of the valve.

[0003] Moreover, the existing pressure regulating stop valve applied to oil fields needs to be equipped with a condenser during use to play a role in cooling. The existing valve can only install the condenser upside down above the actuator, resulting in a large overall volume of the valve and occupying a large space position. For this reason, a pressure regulating stop valve applied to oil fields is proposed. Summary of the Utility Model

[0004] The purpose of the utility model is to propose a pressure regulating stop valve applied to oil fields to solve the above problems.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A pressure regulating stop valve applied to oil fields, including a valve body, a valve seat arranged in the valve body, a valve cover installed on the valve body, a valve stem slidably installed on the valve cover, and a valve core installed at one end of the valve stem; a valve cavity is provided in the valve body, and an inlet channel and an outlet channel communicating with the valve cavity are provided on the valve body; it is characterized in that it further includes a sheath installed on the valve body and located at the inlet channel to prevent the steam from flushing the valve core and play a role in reducing pressure and noise; a plurality of small holes are provided on the sheath.

[0006] Further preferably, it further includes a bottom plate installed on the valve cover, a screw rod installed on the bottom plate, a cover plate installed on the screw rod, and a cylinder installed on the cover plate. A piston is movably installed in the cylinder, and a push rod connected to the valve stem is installed on the piston.

[0007] Further preferably, the cylinder includes a cylinder bottom plate installed on the cover plate, a cylinder sleeve installed on the cylinder bottom plate, and a cylinder cover plate installed on the cylinder sleeve.

[0008] Further preferably, a stroke step adapted to the piston is provided in the cylinder liner, and a cavity is also provided in the cylinder liner.

[0009] Further preferably, a pressure regulating disc is also installed on the valve cover. A spring is installed on the pressure regulating disc. A spring seat is provided on the spring. A bearing mounting block is installed on the spring seat. A bearing connected to the valve stem is installed on the bearing mounting block. A nut is also installed on the valve stem.

[0010] Further preferably, a packing and a packing gland are also installed between the valve cover and the valve stem. A valve cover pressing plate is installed on the valve cover. A packing pressing plate for tightly pressing and installing the packing and the packing gland between the valve cover and the valve stem is installed on the valve cover pressing plate.

[0011] Further preferably, a plurality of sealing grooves are also provided on the packing gland, and sealing rings for increasing the sealing performance between the packing gland and the valve stem and between the packing gland and the valve cover pressing plate are installed in the sealing grooves.

[0012] The beneficial effects of the present utility model are as follows: By installing a sheath in the inlet passage of the valve body and providing a plurality of small holes in the sheath, the sheath plays a role in blocking, reducing pressure and reducing noise for the high-pressure steam entering the inlet passage, avoiding the direct impact and erosion of the high-pressure steam on the valve core, which may affect the balance of the valve stem and the valve core, and at the same time avoiding the long-term erosion of the valve core by the high-pressure steam, which may affect the service life of the valve core.

[0013] By providing a stroke step adapted to the piston in the cylinder liner, the stroke step plays a role in guiding and limiting the movement of the piston. A cavity is also provided in the upper part of the cylinder liner where the stroke step is located. The cavity can be used to install a condenser, integrating the condenser and the cylinder into one body, reducing the overall occupied space. Description of the Drawings

[0014] Att Figure 1 is a schematic structural diagram of the present utility model;

[0015] Att Figure 2 is a partially enlarged structural diagram of the sheath in the present utility model;

[0016] Att Figure 3 is a partially enlarged structural diagram of the packing in the present utility model.

[0017] Legend: 1. Valve body; 11. Valve seat; 12. Valve cavity; 13. Inlet passage; 14. Outlet passage; 2. Valve cover; 21. Bottom plate; 22. Screw rod; 23. Cover plate; 24. Pressure regulating disc; 25. Spring; 26. Spring seat; 27. Bearing mounting block; 28. Bearing; 29. Nut; 3. Valve stem; 4. Valve core; 5. Sheath; 51. Small hole; 6. Cylinder; 61. Piston; 62. Push rod; 63. Cylinder bottom plate; 64. Cylinder liner; 65. Cylinder cover plate; 66. Stroke step; 67. Cavity; 7. Packing; 71. Packing gland; 72. Packing pressing plate; 73. Sealing groove; 74. Sealing ring; 75. Valve cover pressing plate. Detailed implementation mode

[0018] Next, we will further explain a pressure regulating stop valve applied to oil fields according to the present utility model in conjunction with the accompanying drawings.

[0019] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0020] In the present utility model, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense; for example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] Refer to Figures 1-3 As shown in, a pressure regulating stop valve applied to oil fields includes a valve body 1, a valve seat 11 arranged in the valve body 1, a valve cover 2 installed on the valve body 1, a valve stem 3 slidably installed on the valve cover 2, and a valve core 4 installed at one end of the valve stem 3; a valve cavity 12 is provided in the valve body 1, and an inlet passage 13 and an outlet passage 14 communicating with the valve cavity 12 are provided on the valve body 1; it is characterized in that it further includes a sheath 5 welded to the valve body 1 and located at the inlet passage 13 to prevent steam from scouring the valve core 4 and play a role in pressure reduction and noise reduction; a plurality of small holes 51 are provided on the sheath 5.

[0022] By installing a sheath 5 in the inlet passage 13 of the valve body 1, several small holes 51 are opened on the sheath 5. The sheath 5 plays a role in blocking, reducing pressure, and reducing noise for the high-pressure steam entering the inlet passage 13, avoiding the direct impact and erosion of the high-pressure steam on the valve core 4, which may affect the balance of the valve stem 3 and the valve core 4. At the same time, it avoids the long-term erosion of the valve core 4 by the high-pressure steam, thus affecting the service life of the valve core 4.

[0023] In one embodiment, it further includes a bottom plate 21 installed on the valve cover 2, a screw 22 installed on the bottom plate 21, a cover plate 23 installed on the screw 22, and a cylinder 6 installed on the cover plate 23. A piston 61 is movably installed in the cylinder 6, and a push rod 62 connected to the valve stem 3 is installed on the piston 61. During operation, the piston 61 drives the push rod 62, the push rod 62 drives the valve stem 3 to move up and down, and the valve stem 3 drives the valve core 4 to move up and down to open or close the flow path.

[0024] In one embodiment, the cylinder 6 includes a cylinder bottom plate 63 installed on the cover plate 23, a cylinder sleeve 64 installed on the cylinder bottom plate 63, and a cylinder cover plate 65 installed on the cylinder sleeve 64. A travel step 66 adapted to the piston 61 is provided in the cylinder sleeve 64, and a cavity 67 is also provided in the cylinder sleeve 64. By providing a travel step 66 adapted to the piston 61 in the cylinder sleeve 64, the travel step 66 guides and limits the movement of the piston 61. The cylinder sleeve 64 is also provided with a cavity 67 above the travel step 66. The condenser can be installed in the cavity 67, integrating the condenser with the cylinder 6, reducing the overall occupied space. There is no need to install the condenser in an inverted manner on the top of the cylinder 6, and the condenser can be directly installed in the cavity 67 in a right-side-up manner.

[0025] In one embodiment, a pressure adjustment disc 24 is further installed on the valve cover 2. A spring 25 is installed on the pressure adjustment disc 24, a spring seat 26 is provided on the spring 25, a bearing mounting block 27 is installed on the spring seat 26, and a bearing 28 connected to the valve stem 3 is installed on the bearing mounting block 27. A nut 29 is also installed on the valve stem 3. Through the setting of the bearing 28, it is used to reduce the friction during rotation, avoiding friction between the spring seat 26 and the valve stem 3 when the spring seat 26 rotates, and even driving the valve stem 3 to rotate accordingly.

[0026] In one embodiment, a packing 7 and a packing gland 71 are further installed between the valve cover 2 and the valve stem 3. A valve cover pressing plate 75 is installed on the valve cover 2, and a packing pressing plate 72 that presses and installs the packing 7 and the packing gland 71 between the valve cover 2 and the valve stem 3 is installed on the valve cover pressing plate 75.

[0027] In one embodiment, a number of sealing grooves 73 are further provided on the packing gland 71, and sealing rings 74 for increasing the sealing performance between the packing gland 71 and the valve stem 3 and between the packing gland 71 and the valve cover pressing plate 75 are installed in the sealing grooves 73;

[0028] By adding the sealing rings 74 between the packing gland 71 and the valve stem 3 and between the packing gland 71 and the valve cover pressing plate 75, the sealing performance at the packing 7 is further increased, and the anti-leakage level is improved.

[0029] When in use of the present utility model, after the flow path between the valve core 4 and the valve seat 11 is opened, the high-pressure steam enters from the inlet passage 13 and is first blocked by the sheath 5. After being blocked, a small part of the steam enters the sheath 5 through a number of small holes 51 to complete the pressure reduction and noise reduction of the steam. The depressurized gas enters the valve cavity 12 through the gap between the valve core 4 and the valve seat 11 and is discharged through the outlet passage 14 to scour the oil well.

[0030] The protection scope of the present utility model is not limited to the above embodiments and their variations. Routine modifications and replacements made by those skilled in the art based on the content of this embodiment all fall within the protection scope of the present utility model.

Claims

1. A pressure regulating stop valve for use in oil fields, comprising a valve body (1), a valve seat (11) disposed in the valve body (1), a valve cover (2) mounted on the valve body (1), a valve stem (3) slidably mounted on the valve cover (2), and a valve core (4) mounted on one end of the valve stem (3); the valve body (1) is provided with a valve cavity (12), and the valve body (1) is provided with an inlet channel (13) and an outlet channel (14) communicating with the valve cavity (12); the characteristics are as follows: The valve body (1) also includes a protective sleeve (5) mounted on the valve body (1) and located at the inlet passage (13) to prevent steam from scouring the valve core (4) and to reduce pressure and noise. The protective sleeve (5) is provided with a plurality of small holes (51). The valve body (2) also includes a bottom plate (21) mounted on the valve cover (2), a screw (22) mounted on the bottom plate (21), a cover plate (23) mounted on the screw (22), and a cylinder (6) mounted on the cover plate (23). A piston (61) is movably mounted in the cylinder (6), and a push rod (62) connected to the valve stem (3) is mounted on the piston (61). The cylinder (6) includes a cylinder bottom plate (63) mounted on the cover plate (23), a cylinder sleeve (64) mounted on the cylinder bottom plate (63), and a cylinder cover plate (65) mounted on the cylinder sleeve (64). A travel step (66) adapted to the piston (61) is provided in the cylinder sleeve (64), and a cavity (67) is also provided in the cylinder sleeve (64).

2. The pressure regulating stop valve used in oil fields according to claim 1, characterized in that: The valve cover (2) is also mounted with a pressure regulating disk (24), the pressure regulating disk (24) is mounted with a spring (25), the spring (25) is provided with a spring seat (26), the spring seat (26) is mounted with a bearing mounting block (27), the bearing mounting block (27) is mounted with a bearing (28) connected to the valve stem (3), and the valve stem (3) is also mounted with a nut (29).

3. The pressure regulating stop valve used in oil fields according to claim 1, characterized in that: A packing (7) and a packing pressing sleeve (71) are also installed between the valve cover (2) and the valve stem (3); a valve cover pressing plate (75) is installed on the valve cover (2); and a packing pressing plate (72) is installed on the valve cover pressing plate (75) for pressing the packing (7) and the packing pressing sleeve (71) between the valve cover (2) and the valve stem (3).

4. The pressure regulating stop valve used in oil fields according to claim 3, characterized in that: The packing gland (71) is also provided with a plurality of sealing grooves (73), and sealing rings (74) are installed in the sealing grooves (73) for increasing the sealing performance between the packing gland (71) and the valve stem (3) and between the packing gland (71) and the valve cover pressure plate (75).

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