Needle stop valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a needle type stop valve which comprises a valve seat, a valve core, a valve core and a valve core, a plugging opening is formed in the valve seat; a valve rod is in threaded connection with the interior of the valve cover, a plugging head is arranged at the end of the valve rod so as to extend into the valve seat to be suitable for closing the plugging opening, and a gap is reserved between the inserting end of the plugging head and the valve rod to be suitable for radial displacement of the plugging head, so that the pressure of the plugging opening on the plugging head is uniform; according to the needle type stop valve, when the plugging head makes contact with the plugging opening and the plugging head and the plugging opening are not coaxial, the plugging opening exerts pressure on the side wall of the plugging head, so that the inserting end of the plugging head can move in the radial direction, it is guaranteed that the plugging head and the plugging opening are coaxial, single-side stress deformation of the plugging head is avoided, and sealing of the plugging opening is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, specifically relates to globe valves, and particularly relates to a needle-type globe valve. Background Art

[0002] A globe valve, also known as a stop valve, belongs to a forced-sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve flap to force the sealing surface not to leak. In the existing globe valve, the liquid inlet flow channel and the liquid outlet flow channel are connected through a plugging port, and a plugging head is driven by a slidably arranged valve stem to close the plugging port. However, due to mechanical errors in the installation of the valve stem, the plugging head and the plugging port cannot be completely coaxial, and the plugging head will be subjected to radial pressure, resulting in excessive unilateral force on the plugging head, causing the plugging head to deform and unable to close the plugging port well.

[0003] Therefore, how to avoid the plugging port not being plugged well due to mechanical errors in the installation of the valve stem is a technical problem that needs to be urgently solved in this field.

[0004] It should be noted that the above information disclosed in this background art part is only used to understand the background art of the concept of this application. Therefore, the above description is not considered as information of the prior art. Summary of the Invention

[0005] The embodiments of the present disclosure at least provide a needle-type globe valve.

[0006] In a first aspect, the embodiments of the present disclosure provide a needle-type globe valve, including: a valve seat, in which a plugging port is provided; a valve cover, in which a valve stem is threadedly connected, and a plugging head is provided at the end of the valve stem to extend into the valve seat and be adapted to close the plugging port, and there is a gap between the insertion end of the plugging head and the valve stem, which is adapted to the radial displacement of the plugging head to make the pressure on the plugging head by the plugging port uniform.

[0007] In an optional embodiment, an installation counterbore is provided at the end of the valve stem, the plugging head is clamped in the installation counterbore, and the plugging head and the installation counterbore are in clearance fit.

[0008] In an optional embodiment, a limiting ring is provided on the side wall of the plugging head, the limiting ring is clamped in the installation counterbore, and the mouth of the installation counterbore is turned inward to hold the limiting ring.

[0009] In an optional embodiment, the diameter of the plugging head is larger than the mouth of the plugging port, and the side wall of the plugging head is inclined so that the side wall of the plugging head can abut against the mouth of the plugging port.

[0010] In an alternative embodiment, a liquid inlet flow channel and a liquid outlet flow channel are provided in the valve seat, and the end of the liquid inlet flow channel extends vertically upward and is connected to the liquid outlet flow channel, and the plugging port is the connection port between the liquid inlet flow channel and the liquid outlet flow channel.

[0011] In an alternative embodiment, a connecting column is integrally provided at the end of the valve cover, a connecting hole is formed in the side wall of the valve seat, the connecting hole communicates with the liquid outlet flow channel, and the connecting column is threadedly connected in the connecting hole.

[0012] In an alternative embodiment, a sealing ring is sleeved on the root of the connecting column, and the sealing ring is adapted to fit the root of the connecting column and the mouth of the connecting hole.

[0013] In an alternative embodiment, the valve stem is coaxially arranged with the plugging port.

[0014] In an alternative embodiment, the other end of the valve stem extends out of the valve cover, and a rotating wrench is provided at the extending end of the valve stem.

[0015] In a second aspect, an embodiment of the present disclosure further provides a needle valve, including: a plugging port; a valve stem slidably disposed above the plugging port, an installation counterbore is provided at the end of the valve stem, a plugging block is inserted in the installation counterbore, the plugging block is adapted to close the plugging port under the drive of the valve stem, and the diameter of the plugging block is smaller than the diameter of the installation counterbore. When the plugging block is stressed unidirectionally, it can displace radially to make the side wall of the plugging block stressed evenly.

[0016] The beneficial effect of the present invention is that when the plugging head contacts the plugging port and the plugging head and the plugging port are not coaxial, the plugging port presses on the side wall of the plugging head, so that the inserted end of the plugging head can displace radially, ensuring that the plugging head and the plugging port are coaxial, avoiding deformation of the plugging head due to unilateral stress, and ensuring the sealing of the plugging port.

[0017] Other features and advantages of the present invention will be described in the following specification, and, in part, will be obvious from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the specification, claims and drawings.

[0018] To make the above objectives, features and advantages of the present invention more obvious and understandable, specific preferred embodiments are hereby given, and in conjunction with the accompanying drawings, the following detailed description is provided. Description of the Drawings

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A perspective view of a needle-type stop valve provided by an embodiment of the present disclosure;

[0021] Figure 2 A cross-sectional view of a needle-type stop valve provided by an embodiment of the present disclosure;

[0022] Figure 3 is Figure 2 An enlarged view of part A in

[0023] In the figure:

[0024] 1. Valve seat; 11. Sealing port; 12. Liquid inlet channel; 13. Liquid outlet channel; 14. Connecting hole;

[0025] 2. Valve cover; 21. Valve rod; 21a. Mounting counterbore; 22. Plugging head; 22a. Limiting ring; 23. Connecting column; 24. Sealing ring; 25. Rotating wrench. Specific embodiments

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0027] In this article, when it is mentioned that the first component is located on the second component, this may mean that the first component can be directly formed on the second component, or a third component can be inserted between the first component and the second component. In addition, in the drawings, for the effective description of the technical content, the thickness of the components can be exaggerated or reduced.

[0028] In this document, when an element or layer is referred to as being "on," "joined to," "connected to," "attached to," or "coupled to" another element or layer, it can be directly on, joined, connected, attached, or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly joined to," "directly connected to," "directly attached to," or "directly coupled to" another element or layer, there may be no intervening elements or layers. Other words used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0029] In this document, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0030] The terms used herein are for the purpose of describing particular example configurations only and are not intended to be limiting. As used herein, the singular articles "a," "an," and "the" may also be intended to include the plural forms, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as necessarily requiring them to be performed in the particular order discussed or illustrated, unless specifically identified as an order of performance. Additional or alternative steps may be employed.

[0031] As used herein, phrases such as "in one embodiment," "according to one embodiment," "in some embodiments," etc. generally refer to the fact that a particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," etc. are used "as an example, instance, or illustration." Any embodiment, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other embodiments, aspects, or designs. Instead, the use of the terms "example," "exemplary," etc. is intended to present concepts in a concrete manner.

[0032] It has been found through research that there are mechanical errors in the installation of the valve stem in the prior art, and it is impossible to make the plugging head completely coaxial with the plugging port, resulting in the problem and purpose that the plugging head cannot close the plugging port well, which is what the invention aims to solve.

[0033] Based on the above research, the embodiments of the present disclosure provide a needle valve, which enables the plugging head to radially displace at the end of the valve stem, so that the plugging head can be coaxial with the plugging port, improving the sealing performance of the plugging port.

[0034] Regarding the defects existing in the above solutions, they are all the results obtained by the inventor through practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present disclosure in this article should all be the contributions made by the inventor to the present disclosure during the process of the present disclosure.

[0035] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0036] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0037] See Figures 1-3 , which shows a needle valve, including: a valve seat 1, in which a plugging port 11 is provided; a valve cover 2, in which a valve stem 21 is threadedly connected, and a plugging head 22 is provided at the end of the valve stem 21 to extend into the valve seat 1 and be adapted to close the plugging port 11, and there is a gap between the insertion end of the plugging head 22 and the valve stem 21, which is adapted for the radial displacement of the plugging head 22, so that the pressure of the plugging port 11 on the plugging head 22 is uniform; in short, when the plugging head 22 contacts the plugging port 11 and the plugging head 22 is not coaxial with the plugging port 11, the plugging port 11 presses on the side wall of the plugging head 22, so that the insertion end of the plugging head 22 can radially displace, ensuring that the plugging head 22 is coaxial with the plugging port 11, avoiding unilateral deformation of the plugging head 22 due to force, and ensuring the seal of the plugging port 11.

[0038] In some embodiments, an installation counterbore 21a is formed at the end of the valve stem 21, the plugging head 22 is clamped in the installation counterbore 21a, and the plugging head 22 is in clearance fit with the installation counterbore 21a; in short, the insertion end of the plugging head 22 is in clearance fit with the installation counterbore 21a, which enables the plugging head 22 to radially displace when being squeezed by the plugging port 11 to adjust to be coaxial with the plugging port 11, ensuring good sealing of the plugging port 11.

[0039] In some embodiments, a limiting ring 22a is provided on the side wall of the plugging head 22. The limiting ring 22a is clamped in the installation counterbore 21a, and the mouth of the installation counterbore 21a is folded inward to embrace the limiting ring 22a. In short, the limiting ring 22a is inserted into the installation counterbore 21a, and the mouth of the installation counterbore 21a is folded inward by a spinning process to buckle the limiting ring 22a to prevent the plugging head 22 from falling. At the same time, the folded edge of the installation counterbore 21a does not tightly press the limiting ring 22a, and there is a certain gap to enable the limiting ring 22a to move radially within the installation counterbore 21a.

[0040] In some embodiments, the diameter of the plugging head 22 is larger than the mouth of the plugging port 11, and the side wall of the plugging head 22 is inclined so that the side wall of the plugging head 22 can abut against the mouth of the plugging port 11. In short, the side wall of the plugging head 22 is inclined to form a wedge shape to close the plugging port 11, and the inclined side wall can guide the plugging head 22 to move to be coaxial with the plugging port 11.

[0041] In some embodiments, a liquid inlet flow channel 12 and a liquid outlet flow channel 13 are provided in the valve seat 1, and the end of the liquid inlet flow channel 12 extends vertically upward and is connected to the liquid outlet flow channel 13. The plugging port 11 is the connection port between the liquid inlet flow channel 12 and the liquid outlet flow channel 13. In short, the liquid inlet flow channel 12 extends upward to communicate with the liquid outlet flow channel 13 to complete the transmission of the medium, and the liquid inlet flow channel 12 extends vertically upward to form the plugging port 11.

[0042] In some embodiments, a connecting column 23 is integrally provided at the end of the valve cover 2. A connecting hole 14 is provided on the side wall of the valve seat 1. The connecting hole 14 communicates with the liquid outlet flow channel 13, and the connecting column 23 is threadedly connected in the connecting hole 14. In short, the threaded connection between the connecting column 23 and the connecting hole 14 has a simple and reliable structure to complete the detachable connection between the valve cover 2 and the valve seat 1.

[0043] In some embodiments, a sealing ring 24 is sleeved on the root of the connecting column 23. The sealing ring 24 is adapted to fit the root of the connecting column 23 and the mouth of the connecting hole 14. In short, by sleeving the sealing ring 24 on the root of the connecting column 23, the connection between the valve cover 2 and the valve seat 1 is sealed.

[0044] In some embodiments, the valve stem 21 is coaxially arranged with the plugging port 11. In short, a through hole is provided on the valve seat 1, which is coaxial with the thread of the connecting column 23. At the same time, the connecting hole 14 and the vertical extension end of the liquid inlet flow channel 12 are machined in one step to ensure that the valve stem 21 and the plugging port 11 can be as coaxial as possible.

[0045] In some embodiments, the other end of the valve stem 21 extends out of the valve cover 2, and a rotating wrench 25 is provided at the extending end of the valve stem 21; in short, the other end of the valve stem 21 extends out of the valve cover 2 and is connected with a wrench, which can turn the valve stem 21.

[0046] Reference Figures 1-3 , a needle-type globe valve is shown, which includes: a plugging port 11; a valve stem 21, which is slidably arranged above the plugging port 11, an installation counterbore 21a is arranged at the end of the valve stem 21, a plugging block is inserted in the installation counterbore 21a, and the plugging block is adapted to close the plugging port 11 driven by the valve stem 21, and the diameter of the plugging block is smaller than the diameter of the installation counterbore 21a. When the plugging block is stressed unidirectionally, it can displace radially so that the side wall of the plugging block is uniformly stressed; in short, the plugging end of the plugging block can move radially in the installation counterbore 21a, so that when the plugging head 22 is inserted into the plugging port 11, it can automatically align the core, ensure the uniform stress on the side wall of the plugging head 22, and improve the sealing performance of the plugging port 11.

[0047] In the description of the embodiments of the present invention, unless otherwise clearly defined 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention 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 present invention. In addition, terms such as "first", "second" and other numerical terms used in this article do not imply order or sequence unless clearly indicated in the text. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer or section discussed above can be referred to as the second element, component, region, layer or section.

[0049] Spatially relative terms, such as "inner", "outer", "beneath", "below", "lower", "above", "upper", etc., may be used herein for ease of description to describe the relationship of one element or feature to another element or feature as illustrated in the figures. In addition to the orientation depicted in the figures, spatially relative terms are intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is turned over, an element described as "beneath" or "below" another element or feature will then be oriented "above" the other element or feature. Thus, the exemplary term "beneath" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein are to be interpreted accordingly.

[0050] In the above discussion, unless otherwise specified, when used to describe a numerical value, the terms "about", "approximately", "substantially", etc. mean a variation of + / − 10% of that value.

[0051] Inspired by the above-described ideal embodiments of the present invention, through the above description, relevant workers can, without departing from the technical idea of the present invention, make various changes and modifications. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A needle-type globe valve, characterized in that, Comprising: A valve seat (1) with a blocking port (11) provided therein; A valve cover (2) internally threaded with a valve stem (21), and a blocking head (22) is provided at the end of the valve stem (21) to extend into the valve seat (1) and be adapted to close the blocking port (11), and A gap is left between the insertion end of the blocking head (22) and the valve stem (21), which is adapted to the radial displacement of the blocking head (22) so that the pressure of the blocking port (11) on the blocking head (22) is uniform.

2. The needle-type stop valve according to claim 1, characterized in that An installation counterbore (21a) is provided at the end of the valve stem (21), and the blocking head (22) is clamped in the installation counterbore (21a), and The blocking head (22) is in clearance fit with the installation counterbore (21a).

3. The needle-type stop valve according to claim 2, characterized in that A limiting ring (22a) is provided on the side wall of the blocking head (22), and the limiting ring (22a) is clamped in the installation counterbore (21a), and the mouth of the installation counterbore (21a) is turned inward to hold the limiting ring (22a).

4. The needle-type stop valve according to claim 1, characterized in that The diameter of the blocking head (22) is larger than the mouth of the blocking port (11), and the side wall of the blocking head (22) is inclined so that the side wall of the blocking head (22) can abut against the mouth of the blocking port (11).

5. The needle-type stop valve according to claim 1, characterized in that A liquid inlet flow channel (12) and a liquid outlet flow channel (13) are provided in the valve seat (1), and the end of the liquid inlet flow channel (12) extends vertically upward and is connected to the liquid outlet flow channel (13), and the blocking port (11) is the connection port of the liquid inlet flow channel (12) and the liquid outlet flow channel (13).

6. The needle-type stop valve according to claim 1, characterized in that A connecting column (23) is integrally provided at the end of the valve cover (2), a connecting hole (14) is provided on the side wall of the valve seat (1), the connecting hole (14) is communicated with the liquid outlet flow channel (13), and The connecting column (23) is threadedly connected in the connecting hole (14).

7. The needle-type stop valve according to claim 6, characterized in that A sealing ring (24) is sleeved on the root of the connecting column (23), and the sealing ring (24) is adapted to fit the root of the connecting column (23) and the mouth of the connecting hole (14).

8. The needle-type stop valve according to claim 1, characterized in that The valve stem (21) is coaxially arranged with the blocking port (11).

9. The needle-type stop valve according to claim 1, characterized in that The other end of the valve stem (21) extends out of the valve cover (2), and a rotating wrench (25) is provided at the extending end of the valve stem (21).

10. A needle-type globe valve, characterized in that, Comprising: Blocking port (11); A valve stem (21) slidably arranged above the blocking port (11), an installation counterbore (21a) is provided at the end of the valve stem (21), and a blocking block is inserted in the installation counterbore (21a), and the blocking block is adapted to close the blocking port (11) driven by the valve stem (21), and The diameter of the plugging block is smaller than the diameter of the installation counterbore (21a). When the plugging block is stressed unidirectionally, it can displace radially so that the side wall of the plugging block is uniformly stressed.

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