Anti-vibration low-noise needle throttle valve for gas production tree

Abstract

The application relates to the field of natural gas exploitation, and discloses an anti-vibration low-noise needle-shaped throttling valve for a gas production tree, which comprises a valve body, a valve cover, a valve seat, a valve rod and a connecting component, wherein the valve cover is installed on the outer side of the valve body, the valve seat is installed in the valve body, the valve rod is connected to the inner side of the valve cover in a lifting mode, the gap between the valve rod and the valve seat is adjusted to realize throttling, the connecting component is installed on the outer side of the valve rod, a sealing sleeve is arranged on the outer side of the valve rod and used for sealing the valve rod, an anti-vibration centralizing sleeve is fixedly connected to the outer side of the sealing sleeve, the connecting component is arranged in the anti-vibration centralizing sleeve, the connecting component and the anti-vibration centralizing sleeve are matched, the gap between the valve rod and the valve body is filled to centralize the valve rod, and the connecting component and the anti-vibration centralizing sleeve are used for limiting the valve rod in the radial direction, reducing the eccentric wear, jamming and vibration of the valve rod, improving the stability and sealing reliability of the valve rod, and reducing the noise.

Description

Technical Field

[0001] This invention relates to the field of natural gas extraction, and in particular to a shock-resistant, low-noise needle-type throttling valve for gas production trees. Background Technology

[0002] The gas production tree is a key production and transportation device at the wellhead of natural gas extraction. It is used to control the outflow of gas from the wellhead, regulate production, and achieve pressure safety management. As the core control component of the gas production tree, the needle valve functions to achieve stable control of the gas flow rate and downstream pressure at the wellhead by precisely adjusting the flow gap between the valve stem and the valve seat, thus ensuring the safe operation of gas production.

[0003] However, existing conventional needle valves generate significant noise under long-term high-pressure gas flow, formation pressure fluctuations, and wellhead equipment vibration. Their valve stems are also prone to wear, jamming, and vibration, leading to sealing failure under high-pressure conditions and posing a risk of gas leakage. Furthermore, long-term vibration of the valve stem can easily cause the connection between the needle and the valve stem to loosen, or even cause the needle to fall off. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the valve stem of the needle throttle valve is prone to wear, jamming and vibration.

[0005] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a shock-resistant, low-noise needle-type throttling valve for gas production trees, which includes, Valve body; A valve cover, which is mounted on the outside of the valve body; Valve seat, which is installed inside the valve body; A valve stem, which is vertically and flexibly connected inside the valve cover; Throttling is achieved by adjusting the gap between the valve stem and the valve seat; A connecting component, which is mounted on the outside of the valve stem; A sealing sleeve is fitted over the outside of the valve stem and is used to seal the valve stem. An anti-seismic straightening sleeve, wherein the anti-seismic straightening sleeve is fixedly connected to the outside of the sealing sleeve, and the connecting component is disposed inside the anti-seismic straightening sleeve; The connecting component and the anti-seismic straightening sleeve cooperate to fill the gap between the valve stem and the valve body, so as to straighten the valve stem.

[0006] In a preferred embodiment of the anti-vibration and low-noise needle throttle valve for a gas-collecting tree according to the present invention: the valve body includes a valve body body, an air inlet channel opened inside the valve body body, a cavity opened inside the valve body body, and a first mounting cone surface disposed inside the valve body body. The air intake channel is connected to the cavity.

[0007] In a preferred embodiment of the anti-vibration and low-noise needle throttle valve for a gas extraction tree according to the present invention: the valve cover includes a valve cover body, a union nut and an indicator sleeve; The valve cover body is disposed on the outside of the valve body body, the indicator sleeve is threadedly connected to the outside of the valve cover body, and the union nut is sleeved on the outside of the valve body body and threadedly connected to the valve body body.

[0008] In a preferred embodiment of the anti-vibration and low-noise needle valve for gas sampling trees according to the present invention: the valve seat includes a valve seat body threadedly connected to the cavity, an outlet channel opened inside the valve seat body, a flow guide bushing fixedly connected inside the outlet channel, and a first throttling cone surface disposed inside the flow guide bushing.

[0009] In a preferred embodiment of the anti-vibration and low-noise needle throttle valve for gas production tree described in this invention: the valve stem includes a valve stem body passing through the inside of the valve cover body, a needle provided on the outside of the valve stem body, a second throttle cone surface provided on the outside of the needle, a turntable fixedly connected to the outside of the valve stem body, an auxiliary sleeve fixedly connected to the outside of the valve stem body, and a threaded section provided on the outside of the valve stem body. The threaded section is threadedly connected to the valve cover body; The valve stem body and the needle are connected by the connecting component.

[0010] In a preferred embodiment of the anti-vibration and low-noise needle-type throttling valve for a gas-producing tree according to the present invention: the connecting component includes a connector, a first half-ring clamp, a second half-ring clamp, and a connecting sleeve; The connector is fixedly connected to the outside of the needle, the first half-ring clamp and the second half-ring clamp are attached to the outside of the connector, and the connecting sleeve is sleeved on the valve stem body, the outside of the first half-ring clamp and the second half-ring clamp. The connecting sleeve is fixedly connected to the valve stem body by bolts, and the connecting sleeve is fixedly connected to the first half-ring clamp and the second half-ring clamp by bolts respectively.

[0011] In a preferred embodiment of the anti-vibration and low-noise needle throttle valve for a gas-producing tree according to the present invention: the sealing sleeve includes a sealing sleeve body disposed inside the cavity, a second mounting cone surface disposed outside the sealing sleeve body, a limiting step disposed inside the sealing sleeve body, a first gasket disposed outside the limiting step, a sealing gasket disposed outside the first gasket, a second gasket disposed outside the sealing gasket, and a pressure cap threadedly connected inside the sealing sleeve body; The top end of the sealing sleeve body is fitted with the bottom end of the valve cover body, the first mounting cone surface is fitted with the second mounting cone surface, the sealing sleeve body is sleeved on the outside of the valve stem body, and the pressure cap is fitted with the second gasket.

[0012] In a preferred embodiment of the anti-vibration and low-noise needle throttle valve for gas production tree described in this invention: the anti-vibration straightening sleeve includes an anti-vibration straightening sleeve body fixedly connected to the outside of the sealing sleeve body, a cavity disposed inside the anti-vibration straightening sleeve body, a guide groove opened on the outside of the anti-vibration straightening sleeve body, and a through hole opened inside the anti-vibration straightening sleeve body. The through hole connects the cavity and the guide groove, the connecting sleeve is disposed inside the cavity, the outer wall of the connecting sleeve is fitted with the inner wall of the cavity, and the outer wall of the anti-seismic straightening sleeve is fitted with the inner wall of the cavity.

[0013] The beneficial effects of this invention are as follows: by setting the connecting parts and the anti-vibration straightening sleeve, the valve stem can be radially limited, reducing the valve stem's uneven wear, jamming and vibration, thereby improving the stability and sealing reliability of the valve stem and reducing noise. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the overall structure of the present invention is shown.

[0016] Figure 2 A cross-sectional view of the valve body and valve cover of the present invention is shown.

[0017] Figure 3 A cross-sectional view of the valve seat of the present invention is shown.

[0018] Figure 4 A schematic diagram of the valve stem of the present invention is shown.

[0019] Figure 5 The present invention is shown Figure 4 Enlarged view of part A in the middle.

[0020] Figure 6 A cross-sectional view of the sealing sleeve of the present invention is shown.

[0021] Figure 7 A cross-sectional view of the seismic straightening sleeve of the present invention is shown.

[0022] Figure 8A cross-sectional view of the overall structure of the present invention is shown.

[0023] Figure 9 The present invention is shown Figure 8 Enlarged view of part B in the middle.

[0024] In the diagram: 1. Valve body; 2. Valve cover; 3. Valve seat; 4. Valve stem; 5. Connecting component; 6. Sealing sleeve; 7. Anti-vibration straightening sleeve; 11. Valve body; 12. Inlet passage; 13. Cavity; 14. First mounting cone surface; 21. Valve cover body; 22. Union nut; 23. Indicator sleeve; 31. Valve seat body; 32. Outlet passage; 33. Flow guide bushing; 34. First throttling cone surface; 41. Valve stem body; 42. Needle. 43. Second throttling cone surface; 44. Turntable; 45. Auxiliary sleeve; 46. Threaded section; 51. Connector; 52. First half-ring clamp; 53. Second half-ring clamp; 54. Connecting sleeve; 61. Sealing sleeve body; 62. Second mounting cone surface; 63. Limiting step; 64. First gasket; 65. Sealing gasket; 66. Second gasket; 67. Gland; 71. Seismic straightening sleeve body; 72. Cavity; 73. Guide groove; 74. Through hole. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0026] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the inventors, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of the invention.

[0027] Example 1, referring to Figures 1-9 As one embodiment of the present invention, this embodiment provides a shock-resistant, low-noise needle valve for a gas production tree, comprising: Valve body 1; Valve cover 2 is installed on the outside of valve body 1; Valve seat 3 is installed inside valve body 1; Valve stem 4 is vertically connected inside valve cover 2. Valve stem 4 is used to change the gap between valve stem 4 and valve seat 3 by moving it up and down. Throttling is achieved by adjusting the gap between valve stem 4 and valve seat 3; Specifically, when the valve stem 4 moves up and down relative to the valve seat 3, the size of the gap between the valve stem 4 and the valve seat 3 changes. When the gas flows through the gap between the valve stem 4 and the valve seat 3, the gas flow rate is regulated, thereby regulating the gas flow rate by changing the size of the gap between the valve stem 4 and the valve seat 3. When the valve stem 4 is in contact with the valve seat 3, the gap between the valve stem 4 and the valve seat 3 is extremely small, and the gas flow rate is extremely low. Connecting component 5 is installed on the outside of valve stem 4; The sealing sleeve 6 is fitted onto the outside of the valve stem 4 and is used to seal the valve stem 4. Seismic straightening sleeve 7 is fixedly connected to the outside of sealing sleeve 6, and connecting component 5 is located inside seismic straightening sleeve 7; The connecting component 5 and the anti-vibration straightening sleeve 7 work together to fill the gap between the valve stem 4 and the valve body 1, thereby straightening the valve stem 4 and forming a radial limit on the valve stem 4, which reduces the wear, jamming and vibration of the valve stem 4.

[0028] When in use, the operator drives the valve stem 4 to rise, which increases the gap between the valve stem 4 and the valve seat 3. Gas flows in from the inlet of the valve body 1, flows through the gap between the valve stem 4 and the valve seat 3, and then flows out from the outlet of the valve body 1. By controlling the size of the gap between the valve stem 4 and the valve seat 3, the flow rate of gas flowing through the valve body 1 can be controlled. When it is necessary to minimize the gas flow, the valve stem 4 is driven down to make the valve stem 4 fit against the valve seat 3. The gap between the valve stem 4 and the valve seat 3 is extremely small, and the gas flow is extremely low. During use, the connecting component 5 and the anti-vibration straightening sleeve 7 cooperate to form a radial limit on the valve stem 4, reducing the valve stem 4's uneven wear, jamming, and vibration. The sealing sleeve 6 always maintains a sealing fit with the valve stem 4 to prevent gas leakage.

[0029] Example 2, refer to Figure 1 , Figure 2 , Figure 8 and Figure 9 This is one embodiment of the present invention. Based on the previous embodiment, this embodiment provides a shock-resistant, low-noise needle valve for a gas production tree, comprising: The valve body 1 includes a valve body 11, an air intake passage 12 opened inside the valve body 11, a cavity 13 opened inside the valve body 11, and a first mounting cone surface 14 disposed inside the valve body 11. The air intake channel 12 is connected to the cavity 13.

[0030] Gas flows in through the air intake channel 12 and enters the cavity 13 through the air intake channel 12; When the valve stem 4 is in contact with the valve seat 3, the gap between the valve stem 4 and the valve seat 3 is extremely small, the gas flow is extremely small, and most of the gas is blocked inside the cavity 13. When the gap between the valve stem 4 and the valve seat 3 is large, the gas enters the valve seat 3 from the cavity 13 through the gap and then exits from the bottom of the valve seat 3. During this process, the gas will impact the valve stem 4, causing the valve stem 4 to vibrate radially. The radial vibration of the valve stem 4 will not only cause noise and aggravate the uneven wear of the valve stem 4, but also cause the valve stem 4 to bend and deform, which will lead to jamming and affect the service life of the valve stem 4. Because of the connection component 5 and the anti-seismic straightening sleeve 7, the connection component 5 and the anti-seismic straightening sleeve 7 work together to form a radial limit on the valve stem 4, thereby reducing the wear, jamming and vibration of the valve stem 4.

[0031] Example 3, referring to Figure 1 , Figure 2 and Figure 8 This is one embodiment of the present invention. Based on the previous embodiment, this embodiment provides a shock-resistant, low-noise needle valve for a gas production tree, comprising: Valve cover 2 includes valve cover body 21, union nut 22 and indicator sleeve 23; The indicator sleeve 23 is used to indicate the lifting position of the valve stem 4; The valve cover body 21 is located on the outside of the valve body body 11, the indicator sleeve 23 is threadedly connected to the outside of the valve cover body 21, and the nut 22 is sleeved on the outside of the valve body body 11 and threadedly connected to the valve body body 11. For details, see attached. Figure 2 and attached Figure 8 As shown, the lower end face of the valve cover body 21 abuts against the upper end face of the sealing sleeve 6. The valve cover body 21 is threaded to the outside of the valve body body 11 by a nut 22. The inner surface of the nut 22 abuts against the outer surface of the valve cover body 21. By tightening the nut 22, the nut 22 presses the valve cover body 21 onto the sealing sleeve 6 and presses the sealing sleeve 6 into the inside of the valve body body 11, thereby achieving a fixed connection between the valve cover 2 and the valve body 1 and a fixed installation of the sealing sleeve 6.

[0032] Example 4, refer to Figures 1-3 and Figure 8 This is one embodiment of the present invention. Based on the previous embodiment, this embodiment provides a shock-resistant, low-noise needle valve for a gas production tree, comprising: The valve seat 3 includes a valve seat body 31 threadedly connected inside the cavity 13, an air outlet passage 32 opened inside the valve seat body 31, a flow guide bushing 33 fixedly connected inside the air outlet passage 32, and a first throttling cone surface 34 disposed inside the flow guide bushing 33. The first throttling cone surface 34 has a cone-shaped structure. When the valve stem 4 is in close contact with the first throttling cone surface 34, a cone-shaped sealing fit is formed between the valve stem 4 and the first throttling cone surface 34, which can achieve a better sealing effect.

[0033] During use, gas flows in through the air inlet channel 12 and enters the cavity 13 through the air inlet channel 12; When the valve stem 4 is in contact with the first throttling cone surface 34, the gap between the valve stem 4 and the first throttling cone surface 34 is extremely small, and the gas flow rate is extremely low. When the gap between the valve stem 4 and the first throttling cone surface 34 increases, the gas enters the outlet channel 32 from the cavity 13 through the gap between the valve stem 4 and the first throttling cone surface 34, and is then discharged from the outlet end of the valve body 11.

[0034] The gas flow rate is regulated by changing the gap between the valve stem 4 and the first throttling cone surface 34 by moving the valve stem 4 up and down.

[0035] Example 5, refer to Figures 1-8 This is one embodiment of the present invention. Based on the previous embodiment, this embodiment provides a shock-resistant, low-noise needle valve for a gas production tree, comprising: The valve stem 4 includes a valve stem body 41 that passes through the inside of the valve cover body 21, a needle 42 that is disposed on the outside of the valve stem body 41, a second throttling cone surface 43 disposed on the outside of the needle 42, a turntable 44 that is fixedly connected to the outside of the valve stem body 41, an auxiliary sleeve 45 that is fixedly connected to the outside of the valve stem body 41, and a threaded section 46 disposed on the outside of the valve stem body 41. The second throttling cone surface 43 has a cone-shaped structure and is used to cooperate with the first throttling cone surface 34.

[0036] The auxiliary sleeve 45 is fixedly connected to the outside of the valve stem body 41 by bolts. The auxiliary sleeve 45 moves up and down synchronously with the valve stem body 41. The lifting stroke of the valve stem body 41 can be determined by observing the position of the auxiliary sleeve 45 relative to the indicator sleeve 23.

[0037] Threaded section 46 is threadedly connected to valve cover body 21; Specifically, the valve cover body 21 has a hollow structure and an internal thread inside. The threaded section 46 engages with the internal thread of the valve cover body 21. When the operator rotates the turntable 44, the valve stem body 41 moves up and down through the threaded engagement between the threaded section 46 and the valve cover body 21.

[0038] The valve stem body 41 and the needle 42 are connected by the connecting component 5; The connecting component 5 fixes the valve stem body 41 and the needle 42 into one unit, so that the needle 42 moves up and down synchronously with the valve stem body 41, and the second throttling cone surface 43 changes the size of the gap between itself and the first throttling cone surface 34 as the valve stem body 41 moves up and down.

[0039] When the operator rotates the turntable 44, the valve stem body 41 moves up and down axially through the threaded engagement between the threaded section 46 and the valve cover body 21. When the valve stem body 41 is raised or lowered, the valve stem body 41 drives the needle 42 to rise or fall synchronously through the connecting component 5. The second throttling cone surface 43 on the outside of the needle 42 rises or falls synchronously with the needle 42, thereby changing the gap between the second throttling cone surface 43 and the first throttling cone surface 34 to achieve gas flow regulation. The auxiliary sleeve 45 is fixedly connected to the outside of the valve stem body 41. The auxiliary sleeve 45 moves up and down synchronously with the valve stem body 41. The lifting stroke of the valve stem 4 can be determined by observing the position of the auxiliary sleeve 45 relative to the indicator sleeve 23.

[0040] Example 6, refer to Figures 1-9 This is one embodiment of the present invention. Based on the previous embodiment, this embodiment provides a shock-resistant, low-noise needle valve for a gas production tree, comprising: The connecting component 5 includes a connector 51, a first half-ring clamp 52, a second half-ring clamp 53, and a connecting sleeve 54; The connector 51 is fixedly connected to the outside of the needle 42, the first half-ring clamp 52 and the second half-ring clamp 53 are attached to the outside of the connector 51, and the connecting sleeve 54 is sleeved on the outside of the valve stem body 41, the first half-ring clamp 52 and the second half-ring clamp 53. The connecting sleeve 54 is fixedly connected to the valve stem body 41 by bolts, and the connecting sleeve 54 is fixedly connected to the first half-ring clamp 52 and the second half-ring clamp 53 by bolts respectively. Specifically, the first semi-ring clamp 52 and the second semi-ring clamp 53 are two semi-ring structures. The first semi-ring clamp 52 and the second semi-ring clamp 53 are attached to the outer peripheral surface of the joint 51 from both sides, thereby clamping the joint 51 between the first semi-ring clamp 52 and the second semi-ring clamp 53. The connecting sleeve 54 is sleeved on the outer side of the lower end of the valve stem body 41, and is also sleeved on the outer side of the first half-ring clamp 52 and the second half-ring clamp 53. The connecting sleeve 54 wraps the first half-ring clamp 52 and the second half-ring clamp 53 inside the connecting sleeve 54. After the connecting sleeve 54 is fitted onto the outside of the valve stem body 41, it is fixedly connected to the valve stem body 41 by bolts, so that the connecting sleeve 54 is fixed on the valve stem body 41. Then, the connecting sleeve 54 is fitted onto the outside of the first half-ring clamp 52 and the second half-ring clamp 53, and the connecting sleeve 54 is fixedly connected to the first half-ring clamp 52 and the second half-ring clamp 53 by bolts, so that the first half-ring clamp 52 and the second half-ring clamp 53 are fixed inside the connecting sleeve 54 and clamp the connector 51, thereby realizing the connection between the valve stem body 41 and the needle 42.

[0041] When the valve stem body 41 is raised or lowered, the connecting sleeve 54 is raised or lowered synchronously with the valve stem body 41. The first half-ring clamp 52 and the second half-ring clamp 53 drive the connector 51 to rise or fall synchronously through the connecting sleeve 54. The connector 51 then drives the needle 42 to rise or fall synchronously, so that the needle 42 rises or falls synchronously with the valve stem body 41.

[0042] Example 7, referring to Figures 1-9 This is one embodiment of the present invention. Based on the previous embodiment, this embodiment provides a shock-resistant, low-noise needle valve for a gas production tree, comprising: The sealing sleeve 6 includes a sealing sleeve body 61 disposed inside the cavity 13, a second mounting cone surface 62 disposed outside the sealing sleeve body 61, a limiting step 63 disposed inside the sealing sleeve body 61, a first gasket 64 disposed outside the limiting step 63, a sealing gasket 65 disposed outside the first gasket 64, a second gasket 66 disposed outside the sealing gasket 65, and a pressure cap 67 threadedly connected inside the sealing sleeve body 61. A sealing ring is provided between the sealing sleeve body 61 and the cavity 13. The sealing ring is used to seal the gap between the cavity 13 and the sealing sleeve body 61.

[0043] The top end of the sealing sleeve body 61 is fitted with the bottom end of the valve cover body 21, and the first mounting cone surface 14 is fitted with the second mounting cone surface 62; Specifically, the sealing sleeve body 61 is placed inside the cavity 13, and the second mounting cone surface 62 on the outer side of the sealing sleeve body 61 fits against the first mounting cone surface 14 inside the valve body body 11 to achieve cone surface positioning between the sealing sleeve body 61 and the valve body body 11. Then, the bottom end of the valve cover body 21 is attached to the top end of the sealing sleeve body 61, and a union nut 22 is fitted on the outside of the valve cover body 21. The union nut 22 is then threadedly connected to the valve body body 11. Since the second mounting cone surface 62 of the sealing sleeve body 61 is in contact with the first mounting cone surface 14, the sealing sleeve body 61 cannot descend relative to the valve body body 11. When the union nut 22 is tightened, the union nut 22 can press the valve cover body 21 against the top of the sealing sleeve body 61, thereby achieving the fixed installation of the valve cover body 21.

[0044] The sealing sleeve body 61 is fitted on the outside of the valve stem body 41, the gland 67 is fitted with the second gasket 66, and the sealing gasket 65 is disposed between the first gasket 64 and the second gasket 66. The sealing gasket 65 is made of an elastic material, such as rubber. By tightening the gland 67 to make the gland 67 threadedly connected to the sealing sleeve body 61, and after the gland 67 is in contact with the second gasket 66, the gland 67 is tightened further. The gland 67 continues to move down and apply pressure to the second gasket 66. The second gasket 66 transmits the pressure to the sealing gasket 65, and the sealing gasket 65 is compressed to deform, thereby filling the gap between the sealing gasket 65 and the outer wall of the valve stem body 41, thereby achieving a seal between the sealing sleeve body 61 and the valve stem body 41.

[0045] Example 8, referring to Figures 1-9 This is one embodiment of the present invention. Based on the previous embodiment, this embodiment provides a shock-resistant, low-noise needle valve for a gas production tree, comprising: The seismic straightening sleeve 7 includes a seismic straightening sleeve body 71 fixedly connected to the outside of the sealing sleeve body 61, a cavity 72 disposed inside the seismic straightening sleeve body 71, a guide groove 73 opened on the outside of the seismic straightening sleeve body 71, and a through hole 74 opened inside the seismic straightening sleeve body 71. The through hole 74 connects the cavity 72 and the guide groove 73. The connecting sleeve 54 is set inside the cavity 72. The outer wall of the connecting sleeve 54 fits against the inner wall of the cavity 72. The outer wall of the anti-seismic straightening sleeve body 71 fits against the inner wall of the cavity 13.

[0046] Since the outer wall of the connecting sleeve 54 fits against the inner wall of the cavity 72, and the outer wall of the anti-seismic straightening sleeve body 71 fits against the inner wall of the cavity 13, the connecting sleeve 54 and the anti-seismic straightening sleeve body 71 fill the gap between the valve stem body 41 and the cavity 13, thereby forming a radial limit on the valve stem body 41, reducing the vibration of the valve stem body 41, reducing noise, and also reducing the occurrence of uneven wear and jamming of the valve stem body 41.

[0047] In addition, as attached Figure 9 As shown, after the gas flows into the cavity 13 from the air inlet channel 12, part of the gas enters the through hole 74 through the guide groove 73 and then enters the cavity 72 through the through hole 74. The gas entering the cavity 72 will exert downward pressure on the top of the connecting sleeve 54; part of the gas will exert upward pressure from the bottom of the connecting sleeve 54 to the bottom of the connecting sleeve 54. The downward pressure is opposite to the upward pressure. The downward pressure can offset part of the upward pressure, thereby reducing the impact of gas pressure on the connecting sleeve 54 and valve stem body 41, reducing the operating torque of valve stem 4, and improving the stability of valve stem 4 and connecting parts 5. In addition, since some gas enters through the guide groove 73 into the through hole 74 and then into the cavity 72 through the through hole 74, the space between the cavity 72 and the connecting sleeve 54 will be filled with high-pressure gas. The high-pressure gas will form radial support for the connecting sleeve 54 and the valve stem body 41, further stabilizing the valve stem body 41 and reducing the wear, jamming and vibration of the valve stem body 41. The cavity 72 and the connecting sleeve 54 are in a close but not sealed fit. Gas inside the cavity 72 can flow out through the gap between the connecting sleeve 54 and the cavity 72. Therefore, the cavity 72 is not completely sealed by the connecting sleeve 54.

[0048] In addition, as attached Figure 8 As shown, the valve stem body 41 extends relatively long along the axial direction. When the airflow directly impacts the valve stem body 41, the long valve stem body 41 is prone to radial vibration. However, since the anti-seismic straightening sleeve body 71 is sleeved on the outside of the valve stem body 41 and surrounds the valve stem body 41 inside the anti-seismic straightening sleeve body 71, the impact of the airflow acts on the outer wall of the anti-seismic straightening sleeve body 71, rather than directly on the valve stem body 41. This reduces the impact of the airflow on the valve stem body 41 and improves the stability of the valve stem body 41.

[0049] When installing the seismic straightening sleeve 7, grease needs to be applied to the outer surface of the seismic straightening sleeve body 71 to reduce the friction between the seismic straightening sleeve body 71 and the cavity 13, so that the installation can be carried out smoothly. When applying grease, first apply a thick layer of grease to the outer wall of the anti-seismic straightening sleeve body 71. After application, wipe off the excess grease from the outer surface of the anti-seismic straightening sleeve body 71. However, during the application process, the grease will enter the through hole 74. The grease inside the through hole 74 is difficult to wipe off and is retained. After the anti-seismic straightening sleeve 7 is installed inside the cavity 13, gas enters the cavity 13. When the gas flows into the through hole 74 through the guide groove 73, it will squeeze the grease filled inside the through hole 74 into the cavity 72. After entering the cavity 72, the grease adheres to the inner wall of the cavity 72 and the outer wall of the connecting sleeve 54, lubricating the inner wall of the cavity 72 and the outer wall of the connecting sleeve 54, reducing the friction between the connecting sleeve 54 and the cavity 72, and improving the service life. Since the cavity 72 and the connecting sleeve 54 are in a close but not sealed fit, gas can flow out from the gap between the connecting sleeve 54 and the cavity 72. Therefore, the grease can smoothly enter the cavity 72 with the gas through the through hole 74, and will not be unable to enter due to excessive pressure inside the cavity 72. By pre-storing grease in the through hole 74 and introducing the grease into the cavity 72 by gas, the inner wall of the cavity 72 and the outer wall of the connecting sleeve 54 can be automatically lubricated, eliminating the need to separately apply grease to the inner wall of the cavity 72 and the outer wall of the connecting sleeve 54, making the assembly process more convenient. Furthermore, due to the small diameter of the cavity 72, it is difficult to directly apply grease inside the cavity 72, and wiping is very inconvenient after applying too much. However, by automatically bringing the grease pre-stored in the through hole 74 into the cavity 72 through gas, the application operation does not need to be carried out directly inside the cavity 72, effectively avoiding the inconvenience caused by the small space.

[0050] In summary, by setting the connecting component 5 and the anti-vibration straightening sleeve 7, the valve stem 4 can be radially limited, reducing the uneven wear, jamming and vibration of the valve stem 4, thereby improving the stability and sealing reliability of the valve stem 4 and reducing noise.

[0051] Importantly, the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A shock-resistant, low-noise needle-type throttling valve for gas production trees, characterized in that: include, Valve body (1); Valve cover (2), the valve cover (2) is installed on the outside of the valve body (1); Valve seat (3), the valve seat (3) is installed inside the valve body (1); Valve stem (4), which is vertically and vertically connected to the inside of the valve cover (2); Throttling is achieved by adjusting the gap between the valve stem (4) and the valve seat (3); A connecting component (5) is mounted on the outside of the valve stem (4); A sealing sleeve (6) is fitted over the outside of the valve stem (4) and is used to seal the valve stem (4). Seismic straightening sleeve (7), the seismic straightening sleeve (7) is fixedly connected to the outside of the sealing sleeve (6), and the connecting component (5) is disposed inside the seismic straightening sleeve (7); The connecting component (5) and the anti-seismic straightening sleeve (7) cooperate to fill the gap between the valve stem (4) and the valve body (1) to straighten the valve stem (4).

2. The shock-resistant, low-noise needle-type throttling valve for a gas-producing tree according to claim 1, characterized in that: The valve body (1) includes a valve body body (11), an air intake passage (12) opened inside the valve body body (11), a cavity (13) opened inside the valve body body (11), and a first mounting cone surface (14) disposed inside the valve body body (11). The air intake channel (12) is connected to the cavity (13).

3. The shock-resistant, low-noise needle-type throttling valve for a gas-producing tree according to claim 2, characterized in that: The valve cover (2) includes a valve cover body (21), a union nut (22), and an indicator sleeve (23); The valve cover body (21) is disposed on the outside of the valve body body (11), the indicator sleeve (23) is threadedly connected to the outside of the valve cover body (21), and the union nut (22) is sleeved on the outside of the valve body body (11) and threadedly connected to the valve body body (11).

4. The shock-resistant, low-noise needle-type throttling valve for a gas-producing tree according to claim 3, characterized in that: The valve seat (3) includes a valve seat body (31) threadedly connected inside the cavity (13), an air outlet channel (32) opened inside the valve seat body (31), a flow guide bushing (33) fixedly connected inside the air outlet channel (32), and a first throttling cone surface (34) disposed inside the flow guide bushing (33).

5. A shock-resistant, low-noise needle-type throttling valve for a gas-producing tree according to claim 4, characterized in that: The valve stem (4) includes a valve stem body (41) passing through the inside of the valve cover body (21), a needle (42) disposed on the outside of the valve stem body (41), a second throttling cone (43) disposed on the outside of the needle (42), a turntable (44) fixedly connected to the outside of the valve stem body (41), an auxiliary sleeve (45) fixedly connected to the outside of the valve stem body (41), and a threaded section (46) disposed on the outside of the valve stem body (41). The threaded section (46) is threadedly connected to the valve cover body (21); The valve stem body (41) and the needle (42) are connected by the connecting component (5).

6. A shock-resistant, low-noise needle-type throttling valve for a gas-producing tree according to claim 5, characterized in that: The connecting component (5) includes a connector (51), a first half-ring clamp (52), a second half-ring clamp (53), and a connecting sleeve (54). The connector (51) is fixedly connected to the outside of the needle (42), the first half-ring clamp (52) and the second half-ring clamp (53) are attached to the outside of the connector (51), and the connecting sleeve (54) is sleeved on the valve stem body (41), the outside of the first half-ring clamp (52) and the second half-ring clamp (53). The connecting sleeve (54) is fixedly connected to the valve stem body (41) by bolts, and the connecting sleeve (54) is fixedly connected to the first half-ring clamp (52) and the second half-ring clamp (53) by bolts respectively.

7. A shock-resistant, low-noise needle-type throttling valve for a gas-producing tree according to claim 6, characterized in that: The sealing sleeve (6) includes a sealing sleeve body (61) disposed inside the cavity (13), a second mounting cone surface (62) disposed outside the sealing sleeve body (61), a limiting step (63) disposed inside the sealing sleeve body (61), a first gasket (64) disposed outside the limiting step (63), a sealing gasket (65) disposed outside the first gasket (64), a second gasket (66) disposed outside the sealing gasket (65), and a cap (67) threadedly connected inside the sealing sleeve body (61). The top end of the sealing sleeve body (61) is fitted with the bottom end of the valve cover body (21), the first mounting cone surface (14) is fitted with the second mounting cone surface (62), the sealing sleeve body (61) is sleeved on the outside of the valve stem body (41), and the pressure cap (67) is fitted with the second gasket (66).

8. A shock-resistant, low-noise needle-type throttling valve for a gas-producing tree according to claim 7, characterized in that: The seismic straightening sleeve (7) includes a seismic straightening sleeve body (71) fixedly connected to the outside of the sealing sleeve body (61), a cavity (72) disposed inside the seismic straightening sleeve body (71), a guide groove (73) opened on the outside of the seismic straightening sleeve body (71), and a through hole (74) opened inside the seismic straightening sleeve body (71). The through hole (74) connects the cavity (72) and the guide groove (73), the connecting sleeve (54) is disposed inside the cavity (72), the outer wall of the connecting sleeve (54) is fitted with the inner wall of the cavity (72), and the outer wall of the anti-seismic straightening sleeve body (71) is fitted with the inner wall of the cavity (13).

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