A control valve structure

Abstract

The utility model provides a control valve structure, including valve cover, valve body, valve core, valve rod, control valve structure still includes sealing structure, sealing structure includes: upper sleeve, upper seal ring, set up in first cavity, with valve core sealed contact, and set up first recess ring of cross section arc structure in the inside and outside two sides of upper seal ring, valve seat, set up in the inside of valve body, with set up in the bottom side of upper sleeve, and set up recess in valve seat top surface, lower sleeve, lower seal ring, set up in second cavity, seal, with valve core side surface sealed contact, and set up second recess ring of cross section arc structure in the inside and outside two sides of lower seal ring. The device upper seal ring, lower seal ring thermal expansion, make upper seal ring, lower seal ring's first recess ring, second recess ring are filled, then with valve core close contact, can improve the sealing effect of control valve and reduce the wear and tear that sealing structure receives.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and in particular to a control valve structure. Background Technology

[0002] In the current valve body manufacturing and usage process, the control valves on the market generally use rectangular cross-section flexible graphite rings as sealing rings when operating at high temperatures. These sealing rings are fixed to the valve core by a pressure plate, and to achieve a seal, they need to be compressed to generate sealing force. Insufficient compression force of the flexible graphite sealing ring can easily cause internal leakage in the valve, while excessive compression can generate significant friction, leading to sluggish valve operation.

[0003] Therefore, further improvements are needed to address the current issue of insufficient clamping force causing internal leakage in valves. Utility Model Content

[0004] To address the above problems, this utility model provides a control valve structure.

[0005] A control valve structure includes a valve cover, a valve body, a valve core, and a valve stem. The control valve structure also includes a sealing structure, which includes: An upper sleeve is disposed inside the valve body and seals against the valve cover, valve body, and valve core, and has a first cavity on the inner side of its bottom end; an upper sealing ring is disposed in the first cavity and seals against the valve core, and has a first concave ring with an arc-shaped cross-section on both its inner and outer sides; a pressure ring is disposed on the bottom side of the upper sleeve and contacts the upper sealing ring; a valve seat is disposed inside the valve body and on the bottom side of the upper sleeve, and has a groove on its top surface; a lower sleeve is assembled inside the valve seat, and has a second cavity near the top surface of the valve core; a lower sealing ring is disposed in the second cavity and seals against the side of the valve core during sealing, and has a second concave ring with an arc-shaped cross-section on both its inner and outer sides.

[0006] In a preferred embodiment, during sealing, the bottom end of the valve core slides into the second cavity.

[0007] In a preferred embodiment, a first sealing ring is provided between the valve cover and the valve body and the upper sleeve.

[0008] In a preferred embodiment, a second sealing ring is provided between the valve seat and the valve body and the lower sleeve.

[0009] In a preferred embodiment, the control valve structure further includes: a plurality of guide posts, fixed to the pressure ring and the lower sleeve, and slidably connected to the valve core.

[0010] In a preferred embodiment, the control valve structure further includes a packing block, packing, a packing gland, and a gland nut sleeved on the outside of the valve stem, with the packing block, packing, packing gland, and gland nut arranged from bottom to top.

[0011] In a high-temperature environment, the upper and lower sealing rings of the control valve structure of this application expand due to heat, causing the first and second concave rings of the upper and lower sealing rings to be filled and then in close contact with the valve core. This improves the sealing effect of the control valve, reduces wear on the sealing structure, and extends the service life of the control valve. Attached Figure Description

[0012] Other features and advantages of the present invention will become clear from the following description of exemplary embodiments, which is incorporated in and constitutes a part of this specification. The accompanying drawings, which illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0013] Figure 1 Structural diagram of the control valve of this utility model; Figure 2 This utility model relates to a control valve structure. Figure 1 Enlarged view of position A; Figure 3 This utility model relates to a control valve structure. Figure 1 Enlarged view of position B; Figure 4 This utility model relates to a control valve structure. Figure 3 Enlarged view of position C; In the diagram: 10. Valve cover; 11. Valve body; 12. Valve core; 13. Valve stem; 20. Sealing structure; 21. Upper sleeve; 22. First cavity; 23. Upper sealing ring; 24. First concave ring; 25. Pressure ring; 30. Valve seat; 31. Groove; 32. Lower sleeve; 33. Second cavity; 34. Lower sealing ring; 35. Second concave ring; 40. First sealing ring; 41. Second sealing ring; 42. Guide post; 50. Packing block; 51. Packing; 52. Packing gland; 53. Gland nut. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0015] The structure of the control valve will be described in detail below with reference to the accompanying drawings and embodiments. Example

[0016] A control valve structure includes a valve cover 10, a valve body 11, a valve core 12, and a valve stem 13. The control valve structure also includes a sealing structure 20, which comprises: The upper sleeve 21 is disposed inside the valve body 11 and is in sealing contact with the valve cover 10, the valve body 11, and the valve core 12, respectively. A first cavity 22 is formed on the inner side of the bottom end of the upper sleeve 21. The upper sealing ring 23 is disposed in the first cavity 22 and is in sealing contact with the valve core 12. A first concave ring 24 with an arc-shaped cross-section is formed on both the inner and outer sides of the upper sealing ring 23. The pressure ring 25 is disposed on the bottom side of the upper sleeve 21 and is in contact with the upper sleeve 21 and the upper sealing ring 23. The valve seat 30 is located inside the valve body 11 and on the bottom side of the upper sleeve 21, and a groove 31 is provided on the top surface of the valve seat 30; the lower sleeve 32 is assembled inside the valve seat 30, and a second cavity 33 is provided on the lower sleeve 32 near the top surface of the valve core 12; the lower sealing ring 34 is located in the second cavity 33, and when sealing, it makes sealing contact with the side of the valve core 12, and a second concave ring 35 with an arc-shaped cross-section is provided on both the inner and outer sides of the lower sealing ring 34.

[0017] The first cavity 22, the groove 31, and the second cavity 33 are all annular structures.

[0018] During operation, in a high-temperature environment, the upper sealing ring 23 and the lower sealing ring 34 expand due to heat, causing the first concave ring 24 and the second concave ring 35 of the upper sealing ring 23 and the lower sealing ring 34 to be filled, and then to make close contact with the valve core 12. This can improve the sealing effect of the control valve, reduce the wear of the sealing structure 20, and extend the service life of the control valve. Example

[0019] Example 2 is an improvement on Example 1, the improvement including that when sealing, the bottom end of the valve core 12 slides to the second cavity 33.

[0020] The purpose of this is to improve the stability, sealing performance, and service life of the valve body 11 by sliding the bottom end of the valve core 12 to the second cavity 33, thereby enhancing the sealing performance of the valve core 12 and the valve seat 30. Example

[0021] The embodiment is an improvement to embodiment 1, which provides a first sealing ring 40 between the valve cover 10, the valve body 11, and the upper sleeve 21. The improvement includes...

[0022] The valve cover 10 is provided with a first sealing ring 40 between the valve body 11 and the upper sleeve 21, which improves the stability of the valve body 11, enhances the sealing performance of the valve body 11, and extends the service life of the valve body 11. Example

[0023] Example 4 is an improvement on Example 1, the improvement including the provision of a second sealing ring 41 between the valve seat 30 and the valve body 11 and the lower sleeve 32.

[0024] The valve seat 30 is provided with a second sealing ring 41 between the valve body 11 and the lower sleeve 32 to improve the stability of the valve body 11, improve the sealing performance of the valve body 11, and extend the service life of the valve body 11. Example

[0025] Example 5 is an improvement on Example 1. The improvement includes that the control valve structure also includes: multiple guide posts 42, which are fixed between the pressure ring 25 and the lower sleeve 32 and are slidably connected to the valve core 12.

[0026] By setting multiple guide posts 42, the valve core 12 can move up and down stably and reliably. Example

[0027] Example 6 is an improvement on Example 1. The improvement includes that the control valve structure also includes a packing block 50, packing 51, packing gland 52 and gland nut 53 sleeved on the outside of the valve stem 13. The packing block 50, packing 51, packing gland 52 and gland nut 53 are arranged from bottom to top.

[0028] The valve body 11 is improved by providing a packing block 50, packing 51, packing gland 52 and gland nut 53 between the valve cover 10 and the valve stem 13. This improves the stability of the valve body 11, enhances its sealing performance, and extends its service life.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes that element.

[0030] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. The utility model 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 solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A control valve structure, comprising a valve cover (10), a valve body (11), a valve core (12), and a valve stem (13), characterized in that, The control valve structure further includes a sealing structure (20), which comprises: The upper sleeve (21) is disposed inside the valve body (11) and is in sealing contact with the valve cover (10), the valve body (11) and the valve core (12) respectively. A first cavity (22) is provided inside the bottom end of the upper sleeve (21). The upper sealing ring (23) is disposed in the first cavity (22) and is in sealing contact with the valve core (12). A first concave ring (24) with an arc-shaped cross-section is provided on both the inner and outer sides of the upper sealing ring (23). A pressure ring (25) is disposed on the bottom side of the upper sleeve (21) and is in contact with the upper sealing ring (23) of the upper sleeve (21); A valve seat (30) is disposed inside the valve body (11) and on the bottom side of the upper sleeve (21), and a groove (31) is provided on the top surface of the valve seat (30). The lower sleeve (32) is assembled inside the valve seat (30), and a second cavity (33) is provided on the lower sleeve (32) near the top surface of the valve core (12). The lower sealing ring (34) is located in the second cavity (33). When sealing, it is in sealing contact with the side of the valve core (12). A second concave ring (35) with an arc-shaped cross-section is provided on both the inner and outer sides of the lower sealing ring (34).

2. The control valve structure according to claim 1, characterized in that, When sealed, the bottom end of the valve core (12) slides to the second cavity (33).

3. The control valve structure according to claim 1, characterized in that, A first sealing ring (40) is provided between the valve cover (10), the valve body (11), and the upper sleeve (21).

4. The control valve structure according to claim 1, characterized in that, A second sealing ring (41) is provided between the valve seat (30), the valve body (11), and the lower sleeve (32).

5. The control valve structure according to claim 1, characterized in that, The control valve structure also includes: Multiple guide posts (42) are fixed between the pressure ring (25) and the lower sleeve (32) and are slidably connected to the valve core (12).

6. The control valve structure according to claim 1, characterized in that, The control valve structure also includes a packing pad (50), packing (51), packing gland (52) and gland nut (53) sleeved on the outside of the valve stem (13), wherein the packing pad (50), the packing (51), the packing gland (52) and the gland nut (53) are arranged from bottom to top.

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