Pressure-adjustable throttle valve

Abstract

The utility model relates to the technical field of throttle valves, in particular to a pressure-adjustable throttle valve, which comprises a lower valve body, a valve seat fixedly mounted in the valve body, a partition plate arranged on one side of the valve seat, a spring arranged on the upper surface of the partition plate, an upper valve body mounted on one side of the spring, a limit seat fixedly sleeved on the top of the upper valve body, and an adjusting rod sleeved in the limit seat. An electric heating ring is arranged on the lower side of the adjusting rod, and a valve element is installed on the lower side of the electric heating ring. The pressure regulating valve has the beneficial effects that when the pressure of oil gas is changed, the pressure in the lower valve body and the pressure in the upper valve body are changed along with the change of the pressure of the oil gas, the partition plate slides between the limiting strip and the fixing plate to regulate the area, blocked by the check block, of the oil outlet pipe, and therefore the pressure of the oil gas passing through the upper valve body and the lower valve body is regulated; no matter the oil gas pressure is increased or decreased, the flow is basically kept unchanged, so that the pressure of the oil gas flowing out of the oil outlet pipe can be basically kept unchanged, and the pressure fluctuation of the outlet of the valve body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of throttle valves, in particular to a pressure-adjustable throttle valve. Background Art

[0002] A throttle valve is a valve that controls fluid flow by changing the throttle section or throttle length.

[0003] In the prior art, in the process of oil and gas exploitation and transportation, in order to reduce the pressure of the high-pressure oil and gas in the well to the safe pressure of the ground transportation pipeline, it is often necessary to install a throttle valve on the ground for throttling and pressure reduction. However, the opening of the throttle port of the conventional throttle valve is certain during normal operation, and the wellhead pressure of the oil and gas well is unstable, which will cause the fluctuation of the throttle valve outlet pressure, affecting the safety of the ground transportation pipeline and related equipment; moreover, in the process of throttling and pressure reduction of the throttle valve, the temperature will be reduced, and hydrates will be easily generated, and the generated hydrates will block the throttle valve and the transportation pipeline. To this end, the utility model proposes a pressure-adjustable throttle valve to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure-adjustable throttle valve to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a pressure-adjustable throttle valve, comprising: a lower valve body, a valve seat is fixedly installed in the lower valve body, a partition is arranged on one side of the valve seat, and a spring is arranged on the upper surface of the partition.

[0006] An upper valve body is installed on one side of the spring, a limit seat is provided on the top fixed sleeve of the upper valve body, an adjusting rod is provided inside the limit seat, an electric heating ring is provided on the lower side of the adjusting rod, and a valve core is installed on the lower side of the electric heating ring.

[0007] Preferably, an inlet sleeve is fixedly provided on the lower surface of the lower valve body, one side of the valve seat is fixedly connected to the support plate, and the other side of the valve seat is fixedly connected to the fixing plate.

[0008] Preferably, the support plate and the fixing plate are both fixedly connected to the inner wall of the lower valve body, a limiting strip is provided on one side of the fixing plate, and the limiting strip is fixedly connected to the inner wall of the lower valve body.

[0009] Preferably, a limiting groove is provided on one side of the partition, the limiting groove is slidably connected to the limiting strip, the other side of the partition is fixedly connected to the fixed plate, a limiting rod is provided on one side of the spring, and the top of the limiting rod is fixedly connected to the upper valve body.

[0010] Preferably, sealing strips are fixedly connected to the outer walls of the lower valve body and the upper valve body, and connecting plates are fixedly connected to the four outer corners of the lower valve body and the upper valve body. Bolts are sleeved between the two connecting plates, and nuts are threadedly connected to one end of the bolts.

[0011] Preferably, one end of the spring is fixedly connected to the partition, and the other end of the spring is fixedly connected to the top inner wall of the upper valve body. An oil outlet pipe is provided on one side of the spring, one end of the oil outlet pipe is fixedly sleeved on one side of the upper valve body, and the other end of the oil outlet pipe is fixedly sleeved with an outlet sleeve.

[0012] Preferably, the adjusting rod is threadedly connected to the limit seat, one end of the adjusting rod is fixedly connected to a handwheel, the other end of the adjusting rod is fixedly connected to one end of the insulation sleeve, the other end of the insulation sleeve is fixedly connected to the valve core, and the electric heating ring fixing sleeve is arranged on the outer ring surface of the insulation sleeve.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. When oil and gas enter the lower valve body from the inlet sleeve of the lower valve body, the lower part of the entire lower valve body is filled with oil and gas. Because the oil and gas have a certain pressure, the oil and gas will press the partition plate to move upward and block part of the oil outlet pipe, reducing the area through which the oil and gas pass. At this time, the spring is in a compressed state: rotate the handwheel, the valve core moves upward and away from the valve seat, and the oil and gas will flow into the upper part of the valve body through the through hole on the valve seat and flow to the oil outlet pipe on one side of the upper valve body: when the pressure of the oil and gas changes, the pressure inside the lower valve body and the upper valve body changes accordingly, and the partition plate slides between the limit strip and the fixed plate to adjust the area of ​​the oil outlet pipe blocked by the block, thereby adjusting the pressure of the oil and gas passing through the upper valve body and the lower valve body. Because the flow rate is related to the area and flow rate, no matter whether the oil and gas pressure increases or decreases, the flow rate remains basically unchanged, so the pressure of the oil and gas flowing out of the oil outlet pipe can be kept basically unchanged, thereby reducing the pressure fluctuation of the valve body outlet.

[0015] 2. If the oil and gas pressure increases, the partition will move upward, increasing the area of ​​the partition blocking the oil outlet pipe. At this time, the flow rate of oil and gas through the valve body increases, and the flow rate through the oil outlet pipe of the valve body remains basically unchanged. When the oil and gas pressure continues to increase, the partition continues to move upward until the partition contacts the limit rod. The limit rod ensures that the partition will not completely block the oil outlet pipe, avoiding the problem of pressure buildup inside the valve body and ensuring the normal circulation of gas.

[0016] 3. The electric heating ring can heat the area near the valve core to maintain a certain temperature range near the valve core, avoiding excessive pressure drop at the throttle port and the formation of hydrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a side view schematic diagram of the overall structure of the utility model;

[0019] Figure 3 It is a top view schematic diagram of the internal structure of the utility model;

[0020] Figure 4 It is a side view schematic diagram of the overall structure of the utility model.

[0021] In the figure: 1. lower valve body; 2. valve seat; 3. partition; 4. spring; 5. upper valve body; 6. limit seat; 7. adjusting rod; 8. electric heating ring; 9. valve core; 10. inlet sleeve; 11. support plate; 12. fixing plate; 13. limit strip; 14. limit groove; 15. sealing strip; 16. connecting plate; 17. bolt; 18. nut; 19. oil outlet pipe; 20. outlet sleeve; 21. hand wheel; 22. insulation sleeve; 23. limit rod. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present utility model, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0026] See also Figures 1 to 4 The utility model provides a technical solution: a pressure-adjustable throttle valve, comprising: a lower valve body 1, a valve seat 2 is fixedly installed in the lower valve body 1, a partition 3 is arranged on one side of the valve seat 2, a spring 4 is arranged on the upper surface of the partition 3, a valve core 9 is limitedly supported by the valve seat 2 fixedly installed in the valve seat 2, a partition 3 is arranged on one side of the lower valve body 1 for adjusting the opening size of the oil outlet pipe 19, an inlet sleeve 10 is fixedly sleeved on the lower surface of the lower valve body 1, one side of the valve seat 2 is fixedly connected to a support plate 11, and the other side of the valve seat 2 is fixedly connected to a fixed plate 12, an inlet sleeve 10 is fixedly sleeved on the bottom of the lower valve body 1, and an internal thread is provided in the inlet sleeve 10, so as to facilitate the docking of the inlet sleeve 10 with the pipeline, The support plate 11 and the fixed plate 12 reinforce and support both sides of the valve seat 2. The support plate 11 and the fixed plate 12 are fixedly connected to the inner wall of the lower valve body 1. A limiting strip 13 is provided on one side of the fixed plate 12, and the limiting strip 13 is fixedly connected to the inner wall of the lower valve body 1. One side of the inner wall of the fixed plate 12 is fixedly connected to the limiting strip 13. A limiting groove 14 is provided on one side of the partition 3, and the limiting groove 14 is slidably connected to the limiting strip 13. The other side of the partition 3 is fixedly connected to the fixed plate 12. A limiting rod 23 is provided on one side of the spring 4, and the top of the limiting rod 23 is fixedly connected to the upper valve body 5. The partition 3 is limited by the limiting strip 13, so that the partition 3 can slide on the limiting strip 13 through the limiting groove 14.

[0027] It is fixedly connected to the output end of the oil and gas pipeline through the inlet sleeve 10. When the oil and gas enter the lower valve body 1 through the inlet sleeve 10, the bottom of the valve seat 2, the support plate 11 and the fixed plate 12 of the lower valve body 1 are filled with oil and gas. Because the oil and gas have a certain pressure, the oil and gas will move upward through the pushing partition 3. The partition 3 moves into the upper valve body 5 under the sliding connection between the limit groove 14 and the limit strip 13, and the partition 3 blocks part of the outlet pipe 19, thereby reducing the area of ​​the oil and gas passing through the oil outlet pipe 19. At this time, the spring 4 is compressed between the partition 3 and the upper valve body 5.

[0028] An upper valve body 5 is installed on one side of the spring 4, and a limit seat 6 is fixedly sleeved on the top of the upper valve body 5, and an adjusting rod 7 is sleeved inside the limit seat 6. An electric heating ring 8 is arranged on the lower side of the adjusting rod 7, and a valve core 9 is installed on the lower side of the electric heating ring 8. The limit seat 6 fixedly installed on the top of the upper valve body 5 limits the adjusting rod 7, and the adjusting rod 7 sleeved inside the limit seat 6 is convenient for driving the valve core 9 to move. The outer walls of the lower valve body 1 and the upper valve body 5 are fixedly connected with sealing strips 15 all around, and the four outer corners of the lower valve body 1 and the upper valve body 5 are fixedly connected with connecting plates 1 6. Bolts 17 are sleeved between the two connecting plates 16, and one end of the bolts 17 is threadedly connected with a nut 18. The four corners of the lower valve body 1 and the upper valve body 5 are fixedly connected with connecting plates 16. The two connecting plates 16 are fixedly connected by the cooperation of the bolts 17 and the nuts 18. A sealing strip 15 is installed at the joint between the upper valve body 5 and the lower valve body 1. The sealing strip 15 seals the lower valve body 1 and the upper valve body 5 to prevent leakage of oil. One end of the spring 4 is fixedly connected to the partition 3, and the other end of the spring 4 is fixedly connected to the upper valve body 5 is fixedly connected to the inner wall of the top of the spring 4, an oil outlet pipe 19 is arranged on one side of the spring 4, one end of the oil outlet pipe 19 is fixedly sleeved on one side of the upper valve body 5, and the other end of the oil outlet pipe 19 is fixedly sleeved with an outlet sleeve 20, the spring 4 is fixedly connected between the partition plate 3 and the inner wall of the upper valve body 5, the oil outlet pipe 19 is fixedly sleeved on one side of the upper valve body 5, so as to facilitate the transportation of oil and gas, and the outlet sleeve 20 is arranged to facilitate docking with the ground pipeline, the adjusting rod 7 is threadedly connected to the limit seat 6, and one end of the adjusting rod 7 is fixedly connected with a hand wheel 21, The other end of the adjusting rod 7 is connected to one end of the heat-insulating sleeve 22, and the other end of the heat-insulating sleeve 22 is fixedly connected to the valve core 9. The electric heating ring 8 is fixedly sleeved on the outer ring surface of the heat-insulating sleeve 22. The adjusting rod 7 is installed in the limit seat 6 by a threaded connection. The hand wheel 21 fixedly installed at one end of the adjusting rod 7 is convenient for driving the rotation of the adjusting rod 7. The heat-insulating sleeve 22 fixedly installed at the other end of the adjusting rod 7 is convenient for insulating the electric heating ring 8. The bottom of the heat-insulating sleeve 22 is fixedly connected to the valve core 9, and the valve core 9 can be slidably plugged on the valve seat 2.

[0029] When oil and gas enter the lower valve body 1 from the inlet sleeve 10 and lift the partition 3 to compress the spring 4, the hand wheel 21 is twisted to drive the adjusting rod 7 to rotate. The adjusting rod 7 is threadedly connected to the limit seat 6, thereby indirectly driving the valve core 9 to move away from the support plate 11 and the fixed plate 12 by driving the insulation sleeve 22, so that the valve core 9 slides out of the valve seat 2, and the oil and gas will flow into the interior of the upper valve body 5 through the through hole opened on the valve seat 2, and flow in the direction of the oil outlet pipe 19, and then flow into the ground pipeline through the outlet sleeve 20.

[0030] In actual use, the lower valve body 1 is butted against the upper valve body 5 so that the connecting plates 16 installed on the side walls thereof are butted against each other, bolts 17 are sleeved between the two connecting plates 16, and then nuts 18 are used to tighten one end of the bolts 17, so that the lower valve body 1 is fixedly installed against the upper valve body 5. The lower valve body 1 is butted against the upper valve body 5 and a sealing strip 15 is installed, so that the sealing strip 15 is used to seal to prevent leakage of oil, and the inlet sleeve 10 is fixedly connected to the oil pipe in the well, and the outlet sleeve 20 is fixedly connected to the ground transmission pipe. When oil and gas enter the lower valve body 1 through the inlet sleeve 10, the valve seat 2, the support plate 11, and the bottom of the fixing plate 12 of the lower valve body 1 are filled with oil and gas. Because the oil and gas have a certain pressure, the oil and gas will move upward through the top movable partition plate 3. , the partition 3 moves toward the upper valve body 5 under the sliding connection between the limit groove 14 and the limit strip 13, and the partition 3 blocks part of the outlet of the oil outlet pipe 19, so that the area of ​​oil and gas passing through the oil outlet pipe 19 is reduced. At this time, the spring 4 is compressed between the partition 3 and the upper valve body 5. At this time, by twisting the hand wheel 21, the hand wheel 21 drives the adjusting rod 7 to rotate. The adjusting rod 7 is threadedly connected with the limit seat 6, thereby indirectly driving the valve core 9 to move away from the support plate 11 and the fixed plate 12 by driving the insulation sleeve 22, so that the valve core 9 slides out of the valve seat 2, and the oil and gas will flow into the interior of the upper valve body 5 through the through hole opened on the valve seat 2, and flow in the direction of the oil outlet pipe 19, and then flow into the ground pipeline through the outlet sleeve 20.

[0031] If the pressure of the oil and gas increases, the oil and gas will increase the thrust on the partition 3, so that the partition 3 continues to move upward, and then the partition 3 increases the blocking area of ​​the oil outlet pipe 19. Since the outlet area is reduced, the flow rate of the oil and gas increases, and then the flow through the oil outlet pipe 19 remains basically unchanged. When the oil and gas continue to increase, the partition 3 continues to rise until the partition 3 abuts against the limit rod 23. The limit rod 23 holds the partition 3 to ensure that the oil outlet pipe 19 will not be completely blocked by the partition 3, thereby avoiding the generation of pressure in the lower valve body 1 and the upper valve body 5, and ensuring the normal circulation of oil and gas.

[0032] If the pressure of the oil and gas decreases, due to the elastic force of the spring 4, the spring 4 will press the partition 3 to move downward, reducing the blocked area of ​​the oil outlet pipe 19. At this time, the flow speed of the oil and gas is reduced, so that the flow rate through the oil outlet pipe 19 remains basically unchanged.

[0033] The electric heating ring 8 is electrically connected to the external terminal control device. The electric heating ring 8 can heat the vicinity of the valve core 9 to maintain a certain temperature range near the valve core 9 to avoid excessive pressure drop at the throttle port and the formation of hydrates.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure-adjustable throttle valve, comprising a lower valve body (1), characterized in that: A valve seat (2) is fixedly installed in the lower valve body (1), a partition plate (3) is arranged on one side of the valve seat (2), and a spring (4) is arranged on the upper surface of the partition plate (3); An upper valve body (5) is installed on one side of the spring (4); a limit seat (6) is fixedly sleeved on the top of the upper valve body (5); an adjusting rod (7) is sleeved inside the limit seat (6); an electric heating ring (8) is arranged on the lower side of the adjusting rod (7); and a valve core (9) is installed on the lower side of the electric heating ring (8).

2. A pressure adjustable throttle valve according to claim 1, characterized in that: The lower surface of the lower valve body (1) is fixedly sleeved with an inlet sleeve (10), one side of the valve seat (2) is fixedly connected to the support plate (11), and the other side of the valve seat (2) is fixedly connected to the fixing plate (12).

3. A pressure adjustable throttle valve according to claim 2, characterized in that: The support plate (11) and the fixing plate (12) are both fixedly connected to the inner wall of the lower valve body (1); a limit strip (13) is provided on one side of the fixing plate (12); and the limit strip (13) is fixedly connected to the inner wall of the lower valve body (1).

4. A pressure adjustable throttle valve according to claim 3, characterized in that: A limiting groove (14) is provided on one side of the partition (3), the limiting groove (14) is slidably connected to the limiting strip (13), the other side of the partition (3) is fixedly connected to the fixed plate (12), a limiting rod (23) is provided on one side of the spring (4), and the top of the limiting rod (23) is fixedly connected to the upper valve body (5).

5. A pressure adjustable throttle valve according to claim 4, characterized in that: The outer walls of the lower valve body (1) and the upper valve body (5) are fixedly connected with sealing strips (15) all around, and the outer four corners of the lower valve body (1) and the upper valve body (5) are fixedly connected with connecting plates (16), and a bolt (17) is sleeved between the two connecting plates (16), and a nut (18) is threadedly connected to one end of the bolt (17).

6. A pressure adjustable throttle valve according to claim 5, characterized in that: One end of the spring (4) is fixedly connected to the partition (3), and the other end of the spring (4) is fixedly connected to the top inner wall of the upper valve body (5). An oil outlet pipe (19) is provided on one side of the spring (4), and one end of the oil outlet pipe (19) is fixedly sleeved on one side of the upper valve body (5), and the other end of the oil outlet pipe (19) is fixedly sleeved with an outlet sleeve (20).

7. A pressure adjustable throttle valve according to claim 6, characterized in that: The adjusting rod (7) is threadedly connected to the limit seat (6); one end of the adjusting rod (7) is fixedly connected to a hand wheel (21); the other end of the adjusting rod (7) is fixedly connected to one end of a heat insulating sleeve (22); the other end of the heat insulating sleeve (22) is fixedly connected to the valve core (9); and the electric heating ring (8) is fixedly sleeved on the outer ring surface of the heat insulating sleeve (22).

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