Erosion-resistant throttle valve with star-shaped valve core

Abstract

The present invention discloses an erosion-resistant throttle valve with a star-shaped valve core, comprising: a valve body with a liquid inlet on the side, a liquid outlet at the lower end, a valve cavity inside, and the valve cavity, the liquid inlet, and the liquid outlet being connected; a valve cover fixed to the top of the valve body; a star-shaped valve core placed in the valve cavity, a plurality of guide grooves evenly provided on the outer circumferential surface of the lower end of the star-shaped valve core, the depth of the guide grooves gradually deepening along the flow direction of the fluid, and the plurality of guide grooves being symmetrically distributed in pairs with the axis of the star-shaped valve core as the center; a valve stem passing through the valve cover and extending into the valve cavity, and fixedly connected to the top end of the star-shaped valve core; a fixed sleeve placed in the valve cavity and sleeved on the outside of the star-shaped valve core, the top of the fixed sleeve being fixedly connected to the valve cover; a plurality of flow holes evenly provided on the lower part of the fixed sleeve. The star-shaped valve core of the throttle valve of the present invention is not easy to break, and can reduce erosion of the valve body liquid outlet and the equipment therein, thereby extending the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of throttle valves, and more particularly to an erosion-resistant throttle valve with a star-shaped valve core. Background Art

[0002] The throttle valve is a key device in the drilling throttle manifold. During drilling operations, the throttle valve can realize flow control and pressure control of the well fluid, and plays a very important role.

[0003] As a critical component in the throttle manifold, the throttle valve is subject to severe erosion during pressure control, making it the most vulnerable device in the system. Prominent issues with throttle valves during use include poor throttling stability, weak erosion resistance, severe erosion of downstream components, and a short service life. Under high-flow and high-pressure differential conditions, severe erosion or breakage of the throttle valve core often occur before drilling operations are complete, rendering them inoperable. This makes them unable to meet the demands of complex operating conditions.

[0004] Therefore, it is an urgent problem for those skilled in the art to develop an erosion-resistant throttle valve with a star-shaped valve core that can prevent the valve core from breaking and has a long service life. Summary of the Invention

[0005] In view of this, the present invention provides an erosion-resistant throttle valve with a star-shaped valve core, which can prevent the valve core from breaking and has a long service life.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An erosion-resistant throttle valve with a star-shaped valve core, comprising:

[0008] A valve body, wherein a liquid inlet is provided on the side of the valve body, a liquid outlet is provided at the lower end, and a valve cavity is provided inside the valve body, wherein the valve cavity, the liquid inlet and the liquid outlet are connected;

[0009] a valve cover fixed to the top of the valve body;

[0010] A star-shaped valve core is placed in the valve cavity, and a plurality of guide grooves are evenly provided on the outer circumferential surface of the lower end of the star-shaped valve core, the depth of the guide grooves gradually deepens along the flow direction of the fluid, and the plurality of guide grooves are symmetrically distributed in pairs with the axis of the star-shaped valve core as the center;

[0011] a valve stem, the valve stem passing through the valve cover and extending into the interior of the valve cavity, and fixedly connected to the top end of the star-shaped valve core;

[0012] A fixed sleeve is placed in the valve cavity and sleeved on the outside of the star-shaped valve core. The top of the fixed sleeve is fixedly connected to the valve cover; a plurality of flow holes are evenly opened on the lower part of the fixed sleeve.

[0013] The beneficial effect of adopting the above technical solution is that the setting of the flow hole in the present invention can make the fluid enter the guide groove of the star-shaped valve core evenly. The guide groove of the star-shaped valve core is arranged symmetrically. The fluid rushes in from multiple guide grooves symmetrically distributed at the inlet and collides with each other in the valve cavity, consuming a lot of energy, protecting the equipment at the liquid outlet of the valve body from erosion, and thus extending the service life of the throttle valve.

[0014] Preferably, a valve seat is provided at the bottom of the star-shaped valve core, with the outer wall of the star-shaped valve core abutting against the top of the valve seat. The valve seat is fixedly connected to the valve body, and the lower portion of the fixed sleeve abuts against the top of the valve seat. The valve seat tightly fits the outer circle of the lower portion of the star-shaped valve core, which can greatly reduce vibration of the star-shaped valve core during flow and prevent the star-shaped valve core from breaking.

[0015] Preferably, the plurality of through-holes are symmetrically distributed in pairs with the axis of the star-shaped valve core as the center. The fluid flows symmetrically from the through-holes into the valve cavity, which can avoid asymmetric erosion of the star-shaped valve core by biased flow.

[0016] Preferably, a fixing bracket is provided on the top of the fixing sleeve, and the top of the fixing bracket abuts against the lower end of the valve cover. The setting of the fixing bracket facilitates the valve cover to press the fixing sleeve tightly, making its structure more stable.

[0017] Preferably, an anti-rotation pin is fixed to the top of the fixing sleeve, and the top of the anti-rotation pin passes through the fixing bracket and is fixedly connected to the valve cover. The provision of the anti-rotation pin can not only fix the fixing sleeve to the valve cover, but also prevent the fixing sleeve from rotating.

[0018] Preferably, the bottom of the guide groove is provided with multiple layers of tooth-shaped structures sequentially arranged along the direction of fluid flow, with the height of the tooth-shaped structures increasing along the direction of fluid flow. The arrangement of the tooth-shaped structures allows the fluid to flow into the valve cavity in a dispersed manner along the tooth-shaped structures, where the fluid collides with each other within the valve cavity, resulting in significant energy loss and reducing erosion on the star-shaped valve core, the valve body outlet, and downstream equipment.

[0019] Preferably, the tooth-shaped structure is one of a triangle, a rectangle, and a trapezoid.

[0020] Preferably, the cross-section of the guide groove is one of an arc shape, a triangle, and a trapezoid.

[0021] It can be seen from the above technical solutions that, compared with the prior art, the present invention provides an erosion-resistant throttle valve with a star-shaped valve core, which has the following beneficial effects:

[0022] (1) The present invention uses a fixed sleeve to tightly wrap the star-shaped valve core, and the outer side wall of the lower part of the star-shaped valve core is circumferentially supported by the inner hole of the valve seat, so that the star-shaped valve core is extremely stable and can prevent the star-shaped valve core from breaking;

[0023] (2) The flow holes of the fixed sleeve are evenly and symmetrically distributed, which can reduce the erosion of the star valve core by the fluid;

[0024] (3) The guide grooves of the star-shaped valve core are evenly and symmetrically distributed, and a tooth-shaped structure is set at the bottom of the groove, which can play a strong flow-blocking role when the fluid passes through. After the fluid passes through the guide groove, it will collide with each other in the valve cavity, and the energy is greatly weakened, reducing the erosion of the valve body outlet and downstream equipment;

[0025] (4) The throttling area of ​​the guide groove of the star-shaped valve core changes gradually, ensuring the linear throttling of the throttle valve and precise pressure control. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 An internal cross-sectional view of the throttle valve provided by the present invention;

[0028] Figure 2 A schematic structural diagram of a fixed sleeve in a throttle valve provided by the present invention;

[0029] Figure 3 A schematic structural diagram of a star-shaped valve core in a throttle valve provided by the present invention;

[0030] Figure 4 A front view of a star-shaped valve core in a throttle valve provided by the present invention;

[0031] Figure 5 An internal cross-sectional view of a star-shaped valve core in a throttle valve provided by the present invention;

[0032] Figure 6 This is a structural schematic diagram of the lower part of the star-shaped valve core in the throttle valve provided by the present invention.

[0033] Among them, in the figure,

[0034] 1-valve body;

[0035] 11-liquid inlet; 12-liquid outlet; 13-valve chamber;

[0036] 2-valve cover;

[0037] 3-star valve core;

[0038] 31- guide groove; 32- tooth structure;

[0039] 4-valve stem;

[0040] 5-Fixed sleeve;

[0041] 51-through hole;

[0042] 6-valve seat; 7-fixing bracket; 8-anti-rotation pin. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] The embodiment of the present invention discloses an erosion-resistant throttle valve with a star-shaped valve core, comprising:

[0045] The valve body 1 has a liquid inlet 11 on its side and a liquid outlet 12 at its lower end. A valve cavity 13 is provided inside the valve body 1. The valve cavity 13, the liquid inlet 11 and the liquid outlet 12 are connected.

[0046] Valve cover 2, valve cover 2 is fixed to the top of valve body 1;

[0047] The star-shaped valve core 3 is placed in the valve cavity 13. A plurality of guide grooves 31 are evenly provided on the outer circumferential surface of the lower end of the star-shaped valve core 3. The depth of the guide grooves 31 gradually increases along the flow direction of the fluid, and the plurality of guide grooves 31 are symmetrically distributed in pairs with the axis of the star-shaped valve core 3 as the center.

[0048] The valve stem 4 passes through the valve cover 2 and extends into the valve cavity 13, and is fixedly connected to the top end of the star-shaped valve core 3;

[0049] The fixed sleeve 5 is placed in the valve cavity 13 and is sleeved on the outside of the star-shaped valve core 3. The top of the fixed sleeve 5 is fixedly connected to the valve cover 2. The lower part of the fixed sleeve 5 is evenly provided with a plurality of flow holes 51. Figure 2 As shown, there are four through-holes 51, and the fluid flows symmetrically from the through-holes 51 into the valve cavity 13, which can avoid asymmetric erosion of the star-shaped valve core 3 caused by biased flow. Figure 3 As shown, there are 6 guide grooves 31, which are evenly and symmetrically distributed. The fluids flowing out of the guide grooves 31 can impact each other in the valve cavity 13 to consume a large amount of energy, protecting the valve body 1 liquid outlet 12 and equipment outside the liquid outlet 12 from erosion.

[0050] To further optimize the above technical solution, a valve seat 6 is provided below the star-shaped valve core 3, with the outer sidewall of the star-shaped valve core 3 abutting against the top of the valve seat 6. The valve seat 6 is fixedly connected to the valve body 1, and the lower portion of the fixed sleeve 5 abuts against the top of the valve seat 6. The lower outer portion of the star-shaped valve core 3 is supported by the valve seat 6, while the upper outer portion of the star-shaped valve core 3 is enclosed by the fixed sleeve 5, ensuring high stability and preventing breakage of the star-shaped valve core 3.

[0051] In order to further optimize the above technical solution, the plurality of flow holes 51 are symmetrically distributed in pairs with the axis of the star-shaped valve core 3 as the center.

[0052] In order to further optimize the above technical solution, a fixing bracket 7 is provided on the top of the fixing sleeve 5 , and the top of the fixing bracket 7 abuts against the lower end of the valve cover 2 .

[0053] In order to further optimize the above technical solution, an anti-rotation pin 8 is fixed to the top of the fixing sleeve 5 , and the top of the anti-rotation pin 8 passes through the fixing bracket 7 and is fixedly connected to the valve cover 2 .

[0054] In order to further optimize the above technical solution, the bottom of the guide groove 31 is sequentially provided with multiple layers of tooth-shaped structures 32 along the fluid flow direction, and the height of the tooth-shaped structures 32 increases sequentially along the fluid flow direction.

[0055] In order to further optimize the above technical solution, the tooth-shaped structure 32 is one of a triangle, a rectangle, and a trapezoid.

[0056] In order to further optimize the above technical solution, the cross section of the guide groove 31 is one of arc, triangle, and trapezoid. Regardless of the cross section of the guide groove 31, the guide groove 31 is in an oblique cone shape. The oblique cone flow channel design of the star-shaped valve core 3 makes the throttling area gradually change, ensuring the linear throttling of the throttle valve and precise pressure control; Figure 3 As shown, the cross section of the guide groove 31 is an arc-shaped structure of the star-shaped valve core 3.

[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0058] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An erosion-resistant throttle valve with a star-shaped valve core, characterized in that: include: A valve body (1), wherein a liquid inlet (11) is provided on a side of the valve body (1), a liquid outlet (12) is provided at a lower end thereof, and a valve cavity (13) is provided inside the valve body (1), wherein the valve cavity (13), the liquid inlet (11) and the liquid outlet (12) are connected; a valve cover (2), the valve cover (2) being fixed to the top of the valve body (1); A star-shaped valve core (3), the star-shaped valve core (3) is placed in the valve cavity (13), a plurality of guide grooves (31) are evenly provided on the outer circumferential surface of the lower end of the star-shaped valve core (3), the depth of the guide grooves (31) gradually deepens along the flow direction of the fluid, and the plurality of guide grooves (31) are symmetrically distributed in pairs with the axis of the star-shaped valve core (3) as the center; the bottom of the guide groove (31) is sequentially provided with a multi-layer tooth structure (32) along the flow direction of the fluid, and the height of the tooth structure (32) increases sequentially along the flow direction of the fluid; A valve stem (4), the valve stem (4) passes through the valve cover (2), extends into the interior of the valve cavity (13), and is fixedly connected to the top end of the star-shaped valve core (3); A fixed sleeve (5), the fixed sleeve (5) is placed in the valve cavity (13) and is sleeved on the outside of the star-shaped valve core (3), the top of the fixed sleeve (5) is fixedly connected to the valve cover (2); a plurality of flow holes (51) are evenly opened on the lower part of the fixed sleeve (5); A valve seat (6) is provided at the lower portion of the star-shaped valve core (3), and the outer side wall of the star-shaped valve core (3) abuts against the top of the valve seat (6); the valve seat (6) is fixedly connected to the valve body (1), and the lower portion of the fixed sleeve (5) abuts against the top of the valve seat (6).

2. The erosion-resistant throttle valve with a star-shaped valve core according to claim 1, characterized in that: The plurality of through-flow holes (51) are symmetrically distributed in pairs with the axis of the star-shaped valve core (3) as the center.

3. The erosion-resistant throttle valve with a star-shaped valve core according to claim 1, characterized in that: A fixing bracket (7) is provided on the top of the fixing sleeve (5), and the top of the fixing bracket (7) abuts against the lower end of the valve cover (2).

4. The erosion-resistant throttle valve with a star-shaped valve core according to claim 3, characterized in that: An anti-rotation pin (8) is fixed to the top of the fixing sleeve (5), and the top of the anti-rotation pin (8) passes through the fixing bracket (7) and is fixedly connected to the valve cover (2).

5. The erosion-resistant throttle valve with a star-shaped valve core according to claim 1, characterized in that: The tooth-shaped structure (32) is one of a triangle, a rectangle, and a trapezoid.

6. The erosion-resistant throttle valve with a star-shaped valve core according to claim 5, characterized in that: The cross section of the guide groove (31) is one of an arc shape, a triangle shape, and a trapezoid shape.

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