Barrel type stop valve based on flow control

Abstract

The utility model discloses a barrel-type stop valve based on flow control, and relates to the field of barrel-type stop valves, and adopts the technical scheme that the barrel-type stop valve comprises a valve body, a valve cavity is arranged in the valve body, one end of the valve cavity is communicated and connected with a liquid inlet pipe, and the other end of the valve cavity is communicated and connected with a liquid outlet pipe; the top end of the valve body is detachably connected with a top cover through a sealing structure, a valve rod is arranged in the middle of the top cover, the bottom of the valve rod is in threaded connection with a valve clack, and a limiting assembly for limiting the rising height of the valve rod is further arranged at the top end of the valve body. And meanwhile, the safety of petroleum drilling is improved due to limitation on the height of the valve rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of barrel type stop valve, more specifically, it relates to a barrel type stop valve based on flow control. BACKGROUND

[0002] The barrel type stop valve is a kind of cut-off valve with cylindrical barrel as the main body of valve body, mainly used for controlling the on-off and flow regulation of fluid in pipeline, part of barrel type stop valve is designed to be lifted with valve rod, so that operation is intuitive and it is convenient to judge valve state.The core structure of the valve includes cylindrical valve body, valve seat, disc-shaped valve flap, threaded valve rod and hand wheel driving device: the lower end of valve rod is fixedly connected with valve flap, the upper end passes through the top of valve body and is rigidly connected with hand wheel, and the inner hole of hand wheel is provided with internal thread matched with the external thread of valve rod.Working time, rotate hand wheel to drive valve rod to vertically lift along the axis of valve body, and valve rod in turn drives valve flap to move synchronously - when hand wheel rotates clockwise, valve rod and valve flap descend, valve flap sealing surface is attached to valve seat, and fluid is blocked;when hand wheel rotates counterclockwise, valve rod and valve flap rise, and flow gap is formed between valve seat and valve flap, and fluid can pass through.The design that hand wheel is lifted with valve rod enables operator to intuitively judge valve opening degree through hand wheel position.

[0003] However, the maximum flow of barrel type stop valve often exceeds the actual need in the process of oil drilling, so workers need to avoid opening the barrel type stop valve too large (increase the difficulty of operation), so as to avoid forming the flow exceeding control, and excessive flow may cause the scouring of drilling fluid to well wall to be too intense, damage the stability of well wall and cause accidents such as collapse.In addition, excessive flow may also make drilling equipment bear too high pressure, accelerate equipment wear and damage, increase maintenance cost and downtime.

[0004] Therefore, in order to solve the above technical problems, the barrel type stop valve based on flow control is provided. UTILITY MODEL CONTENT

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a barrel type stop valve based on flow control.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a barrel type stop valve based on flow control, comprising a valve body, a valve cavity is arranged in the valve body, an inlet pipe is connected to one end of the valve cavity in communication, an outlet pipe is connected to the other end of the valve cavity in communication,

[0007] The top end of the valve body is detachably connected with a top cover through a sealing structure, a valve rod is arranged in the middle of the top cover, and a valve flap is threadedly connected to the bottom of the valve rod, and a limiting assembly for limiting the lifting height of the valve rod is further arranged at the top end of the valve body.

[0008] Preferably, the sealing structure comprises an annular groove arranged on the top end of the valve body, and an annular plate A fixed on the bottom end of the top cover and capable of being inserted into the annular groove, the bottom end of the top cover is fixedly connected with an annular plate B capable of abutting against the inner side wall of the valve body at the peripheral position of the annular plate A, and the inner surface of the annular groove and the contact surface of the annular plate B with the valve body are both bonded with sealing pads, so that two-layer sealing is realized between the valve body and the top cover.

[0009] Preferably, the outer side wall of the top cover is fixedly connected with a mounting plate A, the top end of the mounting plate A is provided with a plurality of through holes arranged in a circumferential array, the outer side wall of the valve cavity is fixedly connected with a mounting plate B near the opening position, and the top end of the mounting plate B is fixedly connected with a plurality of mounting screws arranged in a circumferential array.

[0010] Preferably, the head of the valve rod is fixedly connected with a rotating plate, the limiting assembly comprises a lifting mechanism and a blocking plate driven by the lifting mechanism to move up and down.

[0011] Preferably, the lifting mechanism comprises a sliding rod fixed on the top end of the top cover, a sliding sleeve is slidingly connected to the outer side wall of the sliding rod, a screw hole is arranged on the back of the sliding sleeve, a fixing screw is threadedly connected to the inner side wall of the screw hole, and the blocking plate is fixed on the surface of the sliding sleeve, so that the height of the blocking plate can be adjusted and then fixed.

[0012] Preferably, the sliding rod is marked with the flow size of the flow, so as to facilitate the adjustment of the height of the blocking plate.

[0013] Preferably, the inlet pipe is provided with a closing valve, which temporarily blocks the drilling fluid or oil and gas from entering the valve cavity.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1、The limiting assembly arranged on the top cover can limit the rising height of the valve rod, so that the flow of the barrel type stop valve can be prevented from being opened too large, the operation of the staff is facilitated, the limitation of the height of the valve rod improves the safety of oil drilling, and thus the problem that the staff needs to avoid opening the barrel type stop valve too large in the background art is solved, and the operation difficulty is increased.

[0016] 2、The utility model marks the corresponding height flow size of the blocking plate on the sliding rod, so as to facilitate the staff to adjust the height of the blocking plate according to the actual situation.

[0017] 3、The utility model can significantly improve the sealing performance of the connection between the valve body and the valve cover through two-layer sealing, and avoid the leakage from this place.

[0018] 4. This utility model can seal the inlet pipe by closing the valve, thereby temporarily blocking drilling fluid or oil and gas from entering the valve cavity, so as to facilitate the internal maintenance of the cylindrical stop valve. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This utility model Figure 1 Another perspective on the specific structure;

[0022] Figure 3 This utility model Figure 1 Enlarged view of the local structure of A;

[0023] Figure 4 This is a schematic diagram of the internal structure of this utility model.

[0024] In the diagram: 1. Valve body; 2. Valve cavity; 3. Inlet pipe; 4. Outlet pipe; 5. Sealing structure; 501. Annular groove; 502. Annular plate A; 503. Annular plate B; 504. Sealing gasket B; 6. Top cover; 7. Valve stem; 8. Valve disc; 9. Restriction assembly; 901. Lifting mechanism; 9011. Slide rod; 9012. Sliding sleeve; 9013. Screw hole; 9014. Fixing screw; 902. Baffle plate; 10. Mounting plate A; 11. Through hole; 12. Mounting screw; 13. Rotating plate; 14. Mounting plate B; 15. Closing valve. Detailed Implementation

[0025] like Figures 1-4 As shown, this utility model provides a cylindrical shut-off valve based on flow control, including a valve body 1, a valve cavity 2 inside the valve body 1, an inlet pipe 3 connected to one end of the valve cavity 2 and an outlet pipe 4 connected to the other end, a top cover 6 detachably connected to the top of the valve body 1 through a sealing structure 5, a valve stem 7 provided in the middle of the top cover 6, and a valve disc 8 threadedly connected to the bottom of the valve stem 7, a limiting component 9 for limiting the rising height of the valve stem 7 provided at the top of the valve body 1, and a rotating plate 13 fixedly connected to the head of the valve stem 7, which facilitates the operator to rotate the valve stem 7.

[0026] Because the valve stem 7 and valve disc 8 are connected by a thread, the valve stem 7 moves linearly up and down along the top cover 6. This is because when the rotating plate 13 rotates the valve stem 7, based on the helical transmission principle of the thread, the rotational motion of the valve stem 7 is converted into axial linear motion. The valve stem 7 has a right-hand thread; when the valve stem 7 is rotated clockwise, it moves upward relative to the top cover 6; when rotated counterclockwise, it moves downward. This movement is to adjust the position of the valve disc 8 within the valve body 1 to control the flow rate and pressure. As described above, the rise of the valve stem 7 causes the valve disc 8 to move upward within the valve body 1, thereby increasing the flow area between the valve disc 8 and the valve seat. With the increase in flow area, the resistance of the fluid passing through the shut-off valve decreases, the flow rate increases, and the opening operation of the cylindrical shut-off valve is realized. Thus, by controlling the rising distance of the valve stem 7, the maximum flow rate of the cylindrical shut-off valve can be controlled.

[0027] Therefore, this utility model has a limiting component 9 on the top cover 6 to limit the rising height of the valve stem 7, which can prevent the flow of the cylindrical shut-off valve from being opened too large, making it convenient for operators to operate. At the same time, limiting the height of the valve stem 7 improves the safety of oil drilling (the maximum flow is controlled, and if the flow is too large, the dangerous situation described in the background art may occur).

[0028] The following is the specific structure of the limiting component 9: The limiting component 9 includes a lifting mechanism 901 and a blocking plate 902 that is driven by the lifting mechanism 901 to move up and down. The lifting mechanism 901 includes a slide rod 9011 fixed to the top of the top cover 6. A sliding sleeve 9012 is slidably connected to the outer wall of the slide rod 9011. A screw hole 9013 is opened on the back of the sliding sleeve 9012, and a fixing screw 9014 is threadedly connected to the inner wall of the screw hole 9013. The blocking plate 902 is fixed to the surface of the sliding sleeve 9012.

[0029] Pull the sliding sleeve 9012 up and down, and the sliding sleeve 9012 moves up and down along the sliding rod 9011 to adjust the height of the baffle plate 902. After the height adjustment is completed, tighten the fixing screw 9014 so that the head of the fixing screw 9014 abuts against the surface of the sliding rod 9011, thereby fixing the sliding sleeve 9012 and the sliding rod 9011, and fixing the height of the baffle plate 902. In this way, when the valve stem 7 moves upward to the maximum flow during use, the rotating plate 13 on it will abut against the baffle plate 902, thereby limiting the valve stem 7 and preventing the operator from making mistakes. This makes it more convenient for the operator to operate and ultimately control the maximum flow of the cylindrical gate valve. Furthermore, the sliding rod 9011 is marked with the flow rate, and the flow rate corresponding to the height of the baffle plate 902 can be marked on the sliding rod 9011 so that the operator can adjust the height of the baffle plate 902 according to the actual situation.

[0030] The sealing structure 5 includes an annular groove 501 at the top of the valve body 1 and an annular plate A502 fixed to the bottom of the top cover 6 and inserted into the annular groove 501. An annular plate B503, which can fit tightly against the inner wall of the valve body 1, is fixedly connected to the bottom of the top cover 6 on the outer periphery of the annular plate A502. Sealing gaskets are bonded to the inner surface of the annular groove 501 and the contact surface between the annular plate B503 and the valve body 1. An mounting plate A10 is fixedly connected to the outer wall of the top cover 6. The top of the mounting plate A10 has multiple through holes 11 arranged in a circumferential array. An mounting plate B14 is fixedly connected to the outer wall of the valve cavity 2 near the opening. Multiple mounting screws 12 arranged in a circumferential array are fixedly connected to the top of the mounting plate B14.

[0031] During installation, the valve disc 8 on the valve stem 7 is inserted into the valve cavity 2 in the valve body 1 (due to precise design, the valve disc 8 can be directly inserted into the valve cavity 2). Then, the through hole 11 on the mounting plate A10 is aligned with the mounting screw 12 on the mounting plate B14. Next, the through hole 11 is passed through the mounting screw 12. At this point, the annular plate A502 is inserted into the annular groove 501, and the annular plate B503 contacts the outer wall of the valve body 1. This allows the sealing gasket in the annular groove 501 to contact the annular plate A502, providing the first layer of seal between the top cover 6 and the valve body 1. The sealing gasket on the annular plate B503 contacts the valve body 1, providing the second layer of seal between the top cover 6 and the valve body 1. These two layers of seal significantly improve the sealing performance between the valve body 1 and the valve cover, preventing leakage from this point. The nut can then be installed on the mounting screw 12. The nut moves downward along the mounting screw 12, and slowly presses against the top of the mounting plate A10, thereby fixing the mounting plate A10 and mounting plate B14. This achieves the fixation between the top cover 6 and the valve body 1. Conversely, by removing the nut, the top cover 6 can be pulled upward, and the annular plate A502 can be pulled out of the annular groove 501. The valve disc 8 can be pulled out of the valve cavity 2, thus achieving the disassembly of the top cover 6 and the valve body 1. The disassembly and assembly are relatively convenient, which facilitates the internal repair of the cylindrical gate valve when it is damaged (in the process of oil drilling, the well is often subjected to extremely high pressure. The cylindrical gate valve needs to work in this high-pressure environment and is subjected to the impact of high-pressure fluid for a long time. The components inside the valve body 1, such as the valve disc 8 and the valve seat, are prone to deformation and wear).

[0032] Furthermore, a shut-off valve 15 is installed on the inlet pipe 3. Normally, the shut-off valve 15 is in the open state and is not used. When it is necessary to repair the cylindrical stop valve, the inlet pipe 3 can be closed by the shut-off valve 15, thereby temporarily blocking drilling fluid or oil and gas from entering the valve chamber 2, so as to facilitate the repair of the cylindrical stop valve.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A flow control based cartridge stop valve characterized by: The utility model provides a valve, including valve body (1), the inside of valve body (1) is provided with valve cavity (2), one end of valve cavity (2) is connected with liquid inlet pipe (3) mutually, the other end is connected with liquid outlet pipe (4) mutually, it is characterized by: The top of valve body (1) is detachably connected with top cover (6) through sealing structure (5), the middle part of top cover (6) is provided with valve rod (7), and the bottom of valve rod (7) is threadedly connected with valve clapper (8), and the top of valve body (1) is also provided with limiting assembly (9) for limiting the ascending height of valve rod (7).

2. A flow control based cartridge stop valve according to claim 1, characterized in that: The sealing structure (5) includes annular groove (501) in the top of valve body (1), and annular plate A (502) is fixed at the bottom of top cover (6) and can be inserted into annular groove (501), the bottom of top cover (6) is fixedly connected with annular plate B (503) on the peripheral part of annular plate A (502) and can be close to the inner wall of valve body (1), and the inner surface of annular groove (501) and the contact surface of annular plate B (503) and valve body (1) are all bonded with sealing pad B (504).

3. A flow control based cartridge stop valve according to claim 2, characterized in that: The outer side wall of top cover (6) is fixedly connected with mounting plate A (10), the top of mounting plate A (10) is provided with a plurality of through holes (11) arranged in circumferential array, the outer side wall of valve cavity (2) is fixedly connected with mounting plate B (14) near the opening part, and the top of mounting plate B (14) is fixedly connected with a plurality of mounting screws (12) arranged in circumferential array.

4. A flow control based cartridge stop valve as claimed in claim 1, wherein: The head of valve rod (7) is fixedly connected with rotating plate (13), and the limiting assembly (9) includes lifting mechanism (901) and blocking plate (902) driven by lifting mechanism (901) to move up and down.

5. A flow control based cartridge stop valve according to claim 4, characterized in that: The lifting mechanism (901) includes slide rod (9011) fixed at the top of top cover (6), the outer side wall of slide rod (9011) is slidably connected with slide sleeve (9012), the back of slide sleeve (9012) is provided with screw hole (9013), and the inner side wall of screw hole (9013) is threadedly connected with fixed screw rod (9014), and the blocking plate (902) is fixed on the surface of slide sleeve (9012).

6. A flow control based cartridge stop valve according to claim 5, characterized in that: The flow size of slide rod (9011) is marked.

7. A flow control based cartridge stop valve as claimed in claim 1, wherein: The liquid inlet pipe (3) is provided with a closure valve (15).

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