Throttle valve with anti-loose valve rod

Abstract

The utility model relates to a throttle valve with an anti-loose valve rod. The throttle valve comprises a valve body, the valve rod and a valve seat, the valve seat is arranged in the valve body, and the valve rod is movably connected with the valve body. The valve rod comprises a rod body and a needle head which are connected through a Haff and a conversion sleeve; a clamping groove is formed in the needle head, a clamping table is arranged on the half, and the clamping table is clamped in the clamping groove; the conversion sleeve is sleeved outside the half and the rod body and is in threaded connection with the half and the rod body respectively; a plurality of threaded holes are formed in the conversion sleeve, a plurality of set screws are correspondingly arranged in the threaded holes, a plurality of deformation grooves are formed in the orifice positions of the threaded holes through riveting, and the set screws are located on the inner sides of the deformation grooves. Rotation stopping between the rod body and the needle head is achieved through the multiple sets of set screws, the set screws are in threaded connection with the conversion sleeve, and the set screw holes in the conversion sleeve are riveted, so that the set screws are prevented from loosening due to vibration, and the connection reliability is improved.

Description

Technical Field

[0001] The utility model belongs to the field of pipeline valves, and in particular relates to a throttle valve with a valve stem preventing loosening. Background Art

[0002] The valve is a control component in the fluid delivery system, with functions such as cut-off, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Valves can be used to control the flow of various types of fluids such as air, water, steam, mud, oil, etc. The throttle valve is the first regulating valve in the oil and gas production process. The throttle valve is used to adjust the pressure and flow after throttling, so that the oil and gas pipelines form a liquid flow with moderate pressure and stable flow, providing a stable liquid flow environment.

[0003] The needle throttle valve is a type of throttle valve, which uses a tapered needle to cooperate with the valve seat to achieve flow regulation; since the performance of the needle throttle valve is mainly based on the cooperation between the needle and the valve seat, and the oil and gas production medium contains a large amount of sand, the wear and erosion resistance of the needle and valve seat materials are required to be high. Conventionally, cemented carbide is used to make it through high-temperature sintering. Therefore, in actual production, the valve stem and the needle are often processed separately and then connected and fixed. Under actual working conditions, when the wellhead vibrates due to gas or oil discharge, it is easy to cause the connection between the stem and the needle to be unstable, and even cause the needle to loosen, affecting normal production operations. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a valve stem anti-loosening throttle valve. The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] The utility model provides a valve stem anti-loosening throttle valve, comprising: a valve body, a valve stem and a valve seat; the valve seat is arranged in the valve body, and the valve stem is movably connected to the valve body;

[0006] The valve stem includes: a stem body, a needle, a half, a conversion sleeve and a plurality of set screws; the stem body and the needle are connected through the half and the conversion sleeve;

[0007] The needle head is provided with a clamping groove, the half is provided with a clamping platform, and the clamping platform is clamped in the clamping groove; the conversion sleeve is arranged outside the half and the rod body, and the conversion sleeve is respectively threadedly connected with the half and the rod body;

[0008] The conversion sleeve is provided with a plurality of threaded holes, and a plurality of set screws are correspondingly arranged in the threaded holes. A plurality of deformation grooves are formed at the openings of the threaded holes by riveting, and the set screws are located at the inner sides of the deformation grooves.

[0009] In an embodiment of the present invention, the clamping groove is annular and is arranged away from the rod body.

[0010] In one embodiment of the present invention, the half is composed of two halves that fit together.

[0011] In one embodiment of the present invention, the set screw is a cone-end set screw.

[0012] In one embodiment of the utility model, a plurality of set screws are arranged in a staggered manner, and the conical end of at least one group of set screws abuts against the outer wall of the half to fix the half and the conversion sleeve; the conical end of at least one group of set screws abuts against the outer wall of the conversion sleeve to fix the rod body and the conversion sleeve.

[0013] In one embodiment of the utility model, sealant is brushed inside a plurality of threaded holes of the conversion sleeve.

[0014] In one embodiment of the utility model, sealant is filled between the half and the needle, between the half and the conversion sleeve, and between the rod body and the conversion sleeve.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model adopts a needle-type valve stem, and the stem body and the needle head of the valve stem are processed and connected as a whole. The stem body and the needle head are fixedly connected as a whole through a half, a conversion sleeve and a set screw. The conversion sleeve is threadedly connected to the stem body and the half, and the rotation prevention between the stem body and the needle head is achieved through a plurality of sets of set screws. In addition to being threadedly connected to the conversion sleeve, the set screw hole position on the conversion sleeve is also riveted, thereby preventing the set screw from loosening due to vibration and improving the reliability of the connection.

[0017] The utility model discloses a valve stem anti-loosening throttle valve, wherein a plurality of sets of set screws are staggeredly arranged, wherein at least one set of set screws is threadedly connected with a conversion sleeve and presses the half against the connection position of a needle, and another set of set screws abuts against the rod body. The two sets of set screws are staggeredly arranged to prevent the relative rotation between the rod body and the needle head.

[0018] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a stem anti-loosening throttle valve according to an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a valve stem of an embodiment of the utility model;

[0021] Figure 3 It is an embodiment of the utility model Figure 2 A partial enlarged view of point I in the middle;

[0022] Figure 4 It is a schematic diagram of the structure of the needle of an embodiment of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of Haff in an embodiment of the utility model;

[0024] Figure 6 It is an embodiment of the utility model Figure 3 A partial enlarged view of point K in the middle.

[0025] Icon: 10-valve body; 20-valve stem; 21-stem body; 22-needle; 221-clamping groove; 23-Haff; 231-clamping platform; 24-conversion sleeve; 25-fastening screw; 30-valve seat. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the present invention, a stem anti-loosening throttle valve proposed according to the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] The above and other technical contents, features and effects of the utility model are clearly presented in the following detailed description of the specific implementation mode in conjunction with the accompanying drawings. Through the description of the specific implementation mode, the technical means and effects adopted by the utility model to achieve the predetermined purpose can be more deeply and specifically understood. However, the attached drawings are only for reference and explanation, and are not used to limit the technical solution of the utility model.

[0028] Embodiment 1

[0029] like Figure 1 and Figure 2 As shown, the utility model provides a valve stem anti-loosening throttle valve, comprising: a valve body 10, a valve stem 20 and a valve seat 30; the valve seat 30 is arranged in the valve body 10, the valve stem 20 is movably connected to the valve body 10, the front end of the valve stem 20 is a needle 22, the needle 22 cooperates with the valve seat 30 through a conical outer contour, and throttling is achieved as the valve stem 20 moves in the valve body 10, that is, the opening size of the valve seat 30 is adjusted by the needle 22 to achieve throttling.

[0030] like Figures 2 to 5As shown, in this embodiment, the valve stem 20 includes: a rod body 21, a needle 22, a half 23, a conversion sleeve 24 and a plurality of set screws 25; the rod body 21 and the needle 22 are connected through the half 23 and the conversion sleeve 24; the conversion sleeve 24 is sleeved outside the half 23 and the rod body 21, and the conversion sleeve 24 is threadedly connected to the half 23 and the rod body 21 respectively; a plurality of threaded holes are arranged on the conversion sleeve 24, and a plurality of set screws 25 are correspondingly arranged in the threaded holes.

[0031] like Figure 4 and Figure 5 As shown, in this embodiment, a clamping groove 221 is provided on the needle 22, and a clamping platform 231 is provided on the half 23. The clamping platform 231 is clamped in the clamping groove 221, which plays a role in limiting the relative movement between the needle 22 and the half 23 along the axial direction, so that the needle 22 and the half 23 are connected and fastened. Preferably, the clamping groove 221 is annular, and the clamping groove 221 is arranged away from the rod body 21, that is, the clamping groove 221 does not directly contact the connection position of the rod body 21.

[0032] In an optional embodiment, the half 23 is in two halves that fit together to facilitate assembly.

[0033] like Figure 3 and Figure 6 As shown, a plurality of deformation grooves are formed at the opening of the threaded hole by riveting, and the set screws 25 are located inside the deformation grooves.

[0034] The principle is that the set screw 25 is firstly threadedly connected with the conversion sleeve 24 to prevent the relative rotation between the rod body 21 and the needle 22. However, when the wellhead gas generates vibration, the connection of the set screw 25 is not always firm. In order to prevent the set screw 25 from loosening, after the set screw 25 is screwed into the threaded hole, the hole of the threaded hole is punched and riveted on its outer side (tail end) to make the hole shrink and deform toward the center of the hole, forming a plurality of deformation grooves. It is easy to understand that at this time, the inner diameter of the hole is reduced, so the set screw 25 is limited in the threaded hole, which plays a role in preventing the set screw 25 from loosening.

[0035] Preferably, the set screw 25 is a cone-end set screw, which uses its sharp end to directly tighten the parts, thereby more reliably preventing loosening and relative rotation.

[0036] like Figure 3As shown, in this embodiment, a plurality of set screws 25 are mutually staggered, and the tapered end of at least one set screw 25 abuts against the outer wall of the half 23 to fix the half 23 and the conversion sleeve 24; the tapered end of at least one set screw 25 abuts against the outer wall of the conversion sleeve 24 to fix the rod body 21 and the conversion sleeve 24. It is easy to understand that, taking two sets of set screws 25 as an example, one set plays a role in preventing the relative rotation between the half 23 and the conversion sleeve 24, and the other set plays a role in preventing the relative rotation between the rod body 21 and the conversion sleeve 24. The two sets of set screws 25 work together to finally prevent the relative rotation between the rod body 21 and the needle 22.

[0037] Furthermore, in order to improve the connection strength of the set screw 25, sealant is brushed into several threaded holes of the conversion sleeve 24. Preferably, Loctite medium-strength thread anaerobic (B-271) sealant is used.

[0038] Similarly, sealant is applied and filled between the half 23 and the needle 22 , between the half 23 and the conversion sleeve 24 , and between the rod body 21 and the conversion sleeve 24 .

[0039] The principle of the stem anti-loosening throttle valve of this embodiment is as follows:

[0040] The valve stem 20 and the valve seat 30 are both arranged in the valve body 10. Throttling is achieved by cooperating one end of the valve stem 20 with the valve seat 30. Since the wear resistance and erosion resistance of the needle head 22 are required to be high, the rod body 21 (stainless steel 12Cr13 material) and the needle head 22 (wear-resistant hard alloy YG8 material) are processed and connected as a whole. Specifically, the rod body 21 and the needle head 22 are connected by a half 23, a conversion sleeve 24 and a plurality of set screws 25. Among them, the half 23 is spliced ​​in two halves, and the needle head 22 and the half 23 are connected to each other through a clamping groove 221 and a clamping platform 231; the conversion sleeve 24 is integrally sleeved outside the half 23 and the rod body 21, that is, the conversion sleeve 24 is used to connect the rod body 21 and the needle head 22 as a whole through the conversion of the half 23. Specifically, there are connected threads outside the half 23 and the rod body 21, and the conversion sleeve 24 is threadedly connected with the half 23 and the rod body 21. Furthermore, the half 23 and the conversion sleeve 24, the rod body 21 and the conversion sleeve 24 are fastened respectively by the set screw 25 to play a role of stopping rotation, and finally the purpose of stopping rotation between the rod body 21 and the needle 22 is achieved, thereby preventing the valve stem 20 of the throttle valve from loosening.

[0041] During installation, first apply sealant to the clamping groove 221 of the needle 22, quickly adhere the clamping platform 231 of the half 23 into the clamping groove 221, then apply sealant to the external thread of the half 23, rotate the conversion sleeve 24, and tighten the combination of the needle 22 and the half 23 into place through the thread, then apply sealant to the external thread of the rod body 21, and transfer the rod body 21 to the conversion sleeve 24; finally, fill the sealant into the threaded hole of the conversion sleeve 24, screw in the set screw 25, and use the riveting tool to rivet the orifice of the threaded hole to achieve the connection between the rod body 21 and the needle 22. Next, assemble the valve stem 20 and the valve seat 30 into the valve body 10 to complete the installation of the throttle valve as a whole.

[0042] The utility model adopts a needle-type valve stem, and the stem body and the needle head of the valve stem are processed and connected as a whole. The stem body and the needle head are fixedly connected as a whole through a half, a conversion sleeve and a set screw. The conversion sleeve is threadedly connected to the stem body and the half, and the rotation prevention between the stem body and the needle head is achieved through a plurality of sets of set screws. In addition to being threadedly connected to the conversion sleeve, the set screw hole position on the conversion sleeve is also riveted, thereby preventing the set screw from loosening due to vibration and improving the reliability of the connection.

[0043] The utility model discloses a valve stem anti-loosening throttle valve, wherein a plurality of sets of set screws are staggeredly arranged, wherein at least one set of set screws is threadedly connected with a conversion sleeve and presses the half against the connection position of a needle, and another set of set screws abuts against the rod body. The two sets of set screws are staggeredly arranged to prevent the relative rotation between the rod body and the needle head.

[0044] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant is intended to cover non-exclusive inclusion, so that the article or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or device including the elements. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The orientation or position relationship indicated by "up", "down", "left", "right", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the 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 operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.

[0045] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A stem anti-loosening throttle valve, characterized in that: include: A valve body (10), a valve stem (20) and a valve seat (30); the valve seat (30) is arranged in the valve body (10), and the valve stem (20) is movably connected to the valve body (10); The valve stem (20) comprises: a rod body (21), a needle head (22), a half (23), a conversion sleeve (24) and a plurality of set screws (25); the rod body (21) and the needle head (22) are connected via the half (23) and the conversion sleeve (24); The needle head (22) is provided with a clamping groove (221), the half (23) is provided with a clamping platform (231), and the clamping platform (231) is clamped in the clamping groove (221); the conversion sleeve (24) is sleeved on the half (23) and the rod body (21), and the conversion sleeve (24) is respectively threadedly connected to the half (23) and the rod body (21); The conversion sleeve (24) is provided with a plurality of threaded holes, and a plurality of set screws (25) are correspondingly arranged in the threaded holes. A plurality of deformation grooves are formed at the openings of the threaded holes by riveting, and the set screws (25) are located on the inner side of the deformation grooves.

2. The stem anti-loosening throttle valve according to claim 1, characterized in that: The clamping groove (221) is annular and is arranged away from the rod body (21).

3. The stem anti-loosening throttle valve according to claim 1, characterized in that: The Haff (23) is composed of two halves that are fused together.

4. The stem anti-loosening throttle valve according to claim 1, characterized in that: The set screw (25) is a cone-end set screw.

5. The stem anti-loosening throttle valve according to claim 4, characterized in that: The plurality of set screws (25) are arranged in a staggered manner, and the conical ends of at least one group of the set screws (25) abut against the outer wall of the half (23) to fix the half (23) and the conversion sleeve (24); the conical ends of at least one group of the set screws (25) abut against the outer wall of the conversion sleeve (24) to fix the rod body (21) and the conversion sleeve (24).

6. The stem anti-loosening throttle valve according to claim 1, characterized in that: Sealant is brushed inside a plurality of threaded holes of the conversion sleeve (24).

7. The stem anti-loosening throttle valve according to claim 1, characterized in that: Sealant is filled between the half (23) and the needle (22), between the half (23) and the conversion sleeve (24), and between the rod body (21) and the conversion sleeve (24).

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