Stop valve and refrigerating system thereof

Abstract

The utility model relates to the technical field of refrigerating systems, in particular to a stop valve and a refrigerating system thereof. The stop valve comprises a valve body and a valve element, an operation hole is formed in the top end of the valve element, a first sealing groove formed by sinking inwards from the outer surface is formed in the peripheral side of the valve element, the first sealing groove comprises a diameter expansion section and a diameter section, the diameter expansion section is located on the side, close to the top end of the valve element, of the diameter section, and the wall, corresponding to the diameter expansion section, of the valve element is thick. The diameter section is provided with a first end close to the top end of the valve element, the operation hole is provided with a second end close to the bottom end of the valve element, the diameter expanding section is provided with a third end close to the top end of the valve element, and the second end is located between the first end and the third end. The valve core has the advantages that when the operation hole for the operation of an external wrench on the valve core extends to the diameter expanding section, the structural strength of the valve core at the position of the diameter expanding section is high, and the valve core cannot be damaged due to the operation of the external wrench.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration systems, in particular to a stop valve and a refrigeration system thereof. Background Art

[0002] Stop valves are widely used in refrigeration systems and can achieve the on-off of pipelines by the movement of the valve cores therein.

[0003] In order to improve the sealing effect between the valve core and the valve body, a first sealing groove is usually opened on the outer peripheral wall of the valve core, and a sealing ring is installed in the first sealing groove. However, the existence of the first sealing groove will cause the wall thickness at the corresponding position of the valve core to become thinner. Also, since an operation hole for a wrench to extend into and turn is to be opened in the valve core, in order to ensure compatibility with a wrench of a general standard part, the opening size of the operation hole cannot be reduced. This limitation results in the thickness of the valve core wall being only relatively thin in the area where the sealing ring is grooved, increasing the possibility of the valve core cracking under high-pressure working conditions or frequent operation conditions.

[0004] Therefore, some valve cores choose to set the operation hole above the first sealing groove, so as to avoid the influence of the setting of the operation hole on the thickness of the valve core arm at the first sealing groove. However, such a setting will make the overall axial length of the valve core longer, resulting in too high a height of the valve body, occupying a large position, and it is also easy to cause the external operation wrench not to reach the bottom of the operation hole when the valve core is in a fully closed state. Summary of the Utility Model

[0005] In view of the above technical problems, the utility model provides a stop valve.

[0006] A stop valve includes: a valve body, the inside of the valve body having a passage for the medium to flow through; a valve core, the valve core being installed in the valve body and capable of moving along the axis of the valve core to cut off or open the passage; wherein, the valve core has a top end away from the passage and a bottom end close to the passage, an operation hole is opened at the top end of the valve core, a first sealing groove formed by inward depression from the outer surface is opened on the outer peripheral side of the valve core. Along the axial direction of the valve core, the first sealing groove includes a diameter-expanded section and a diameter section, the diameter-expanded section is located on the side of the diameter section close to the top end of the valve core, and the minimum distance D1 between the outer surface of the diameter-expanded section and the axis of the valve core is greater than the distance D2 between the outer surface of the diameter section and the axis of the valve core. Along the axis of the valve core, the diameter section has a first end close to the top end of the valve core and located on the valve core, the operation hole has a second end close to the bottom end of the valve core, the diameter-expanded section has a third end close to the top end of the valve core and located on the valve core. Along the axis of the valve core, the second end is located between the first end and the third end.

[0007] With such a setting, the operation hole allows an external operation tool to extend therein to turn the valve core so that the valve core moves axially, thereby controlling the on / off of the passage or adjusting the flow rate. The distance between the enlarged diameter section and the axis of the valve core is greater than the distance between the diameter section and the axis of the valve core. That is, along the radial direction of the valve core, any position of the enlarged diameter section is radially outside the diameter section. Therefore, the wall thickness of the valve core at the enlarged diameter section is greater than that at the diameter section. Thus, the enlarged diameter section can provide higher structural strength. Along the axial direction of the valve core, the second end is located between the first end and the third end. Therefore, the bottom of the operation hole extends at most to the radial inside of the enlarged diameter section and will not extend to the diameter section. So the wall thickness at the position of the operation hole is always thick, ensuring the structural strength of the valve core and preventing the valve core from being damaged by an external wrench during operation. The distance between the second end at the bottom of the operation hole and the third end at the top of the enlarged diameter section is the distance that the operation hole can extend. When the operation hole extends downward by the above distance, the part close to the top end of the valve core can shorten the above distance, thereby reducing the axial length of the valve core and thus reducing the size of the entire stop valve and optimizing the size of the stop valve.

[0008] In one embodiment, the distance between the enlarged diameter section and the operation hole is defined as the wall thickness of the valve core. Along the direction from the first end to the third end, the wall thickness dimension gradually increases.

[0009] In one embodiment, a chamfer is provided at the bottom of the first sealing groove close to the top end of the valve core, and the chamfer is the enlarged diameter section.

[0010] In one embodiment, the chamfer is set as a rounded chamfer or a right chamfer.

[0011] In one embodiment, along the axial direction of the valve core, the distance between the first end and the second end is H, and H satisfies: 0 < H ≤ 7 mm.

[0012] In one embodiment, H satisfies: 0 < H ≤ 2 mm.

[0013] In one embodiment, the valve core is further provided with a chip removal hole. The chip removal hole is set as a cylindrical hole structure. The chip removal hole communicates with the operation hole and is located on the side of the operation hole away from the top end of the valve core and extends in the direction of the passage.

[0014] In one embodiment, a second sealing groove is further provided on the outer peripheral wall of the valve core. The second sealing groove is located on the side of the first sealing groove close to the bottom end of the valve core, is arranged at an interval from the first sealing groove, and is located radially outside the chip removal hole.

[0015] In one of the embodiments, one side wall of the second sealing groove near the bottom end of the valve core is inclined towards the bottom end of the valve core relative to the depth direction of the second sealing groove.

[0016] The present utility model also provides a refrigeration system, including the stop valve as described above.

[0017] Compared with the prior art, the valve core of the stop valve provided by the present utility model is provided with a first sealing groove for installing a sealing member, and the structure of the first sealing groove is optimized, so that it has a diameter-expanded section and a diameter section. The wall thickness of the valve core on the radially inner side corresponding to the diameter-expanded section is relatively thick. Therefore, when the operation hole for external wrench operation on the valve core extends to the diameter-expanded section, the structural strength of the valve core at the diameter-expanded section is high, and the valve core will not be damaged due to the operation of the external wrench. Moreover, the diameter-expanded section enables the opening position of the operation hole to move a certain distance towards the bottom end of the valve core as a whole, thereby shortening the axial length of the valve core, optimizing the overall size of the stop valve, and preventing the external operation wrench from not being able to reach the bottom of the operation hole when the stop valve is in a fully closed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of one of the embodiments of the valve core of the stop valve provided by the present utility model;

[0019] Figure 2 is a cross-sectional view of one of the embodiments of the valve core of the stop valve provided by the present utility model.

[0020] The meanings represented by the symbols in the drawings are as follows:

[0021] 100, valve core; 10, operation hole; 11, second end; 20, first sealing groove; 21, diameter-expanded section; 211, third end; 22, diameter section; 221, first end; 30, second sealing groove; 40, chip removal hole; 50, top end; 60, bottom end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the above objects, features and advantages of the present application more obvious and understandable, the following detailed description of the specific embodiments of the present application will be made with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are only for illustrative purposes and do not represent the only implementation.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0025] In this application, unless otherwise clearly specified and defined, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0026] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0027] Please refer to Figure 1 - Figure 2 , this utility model provides a globe valve, in which a chamfer is provided at the bottom of the first sealing groove 20 for installing a sealing ring in the axial direction of the valve core 100, and the position of the chamfer corresponds to the position of the operation hole 10, so that the operation hole 10 can be arranged closer to the bottom end 60 of the valve core 100, thereby shortening the overall length of the valve core 100 to optimize the valve body size.

[0028] The globe valve includes a valve body and a valve core 100. The interior of the valve body has a passage for the medium to flow. The valve core 100 is installed in the valve body and can move along the axial direction of the valve core 100 to cut off or open the passage, realizing the opening and closing of the globe valve. Among them, the valve core 100 has a top end 50 away from the passage and a bottom end 60 close to the passage. An operation hole 10 is provided at the top end 50 of the valve core 100. A first sealing groove 20 formed by inward depression from the outer surface is provided on the outer peripheral side of the valve core 100. Along the axial direction of the valve core 100, the first sealing groove 20 includes a diameter-expanded section 21 and a diameter section 22. The diameter-expanded section 21 is located on the side of the diameter section 22 close to the top end 50 of the valve core 100, and the minimum distance D1 between the diameter-expanded section 21 and the axis of the valve core 100 is greater than the distance D2 between the diameter section 22 and the axis of the valve core 100. Along the axial direction of the valve core 100, the diameter section 22 has a first end 221 close to the top end 50 of the valve core 100 and located inside the valve core 100. The operation hole 10 has a second end 11 close to the bottom end 60 of the valve core 100. The diameter-expanded section 21 has a third end 211 close to the top end 50 of the valve core 100 and located inside the valve core 100. Along the axial direction of the valve core 100, the second end 11 is located between the first end 221 and the third end 211.

[0029] In this way, the operation hole 10 allows an external operation tool to extend therein to screw the valve core 100 so that the valve core 100 moves axially, thereby controlling the on-off of the passage or realizing the adjustment of the flow rate. The distance between the diameter-expanded section 21 and the axis of the valve core 100 is greater than the distance between the diameter section 22 and the axis of the valve core 100, that is, along the radial direction of the valve core 100, any position of the diameter-expanded section 21 is radially outside the diameter section 22. Therefore, the wall thickness of the valve core 100 at the diameter-expanded section 21 is greater than that at the diameter section 22. Thus, the diameter-expanded section 21 can provide higher structural strength and is not easily broken. The second end 11 of the operation hole 10 close to the bottom end 60 of the valve core 100 is located between the first end 221 and the third end 211. Therefore, the bottom of the operation hole 10 extends at most to the radial inside of the diameter-expanded section 21 and will not extend to the diameter section 22. So the wall thickness at the position of the operation hole 10 is always thick, ensuring the structural strength of the valve core 100 and preventing the external wrench from damaging the valve core 100 during operation. The distance between the second end 11 at the bottom of the operation hole 10 and the third end 211 at the top of the diameter-expanded section 21 is the distance that the operation hole 10 can extend. When the operation hole 10 extends downward by the above distance, the part of it close to the top end 50 of the valve core 100 can shorten the above distance, that is, reduce the axial length of the valve core 100, thereby reducing the size of the entire globe valve, optimizing the size of the globe valve, and preventing the external operation wrench from not being able to reach the bottom of the operation hole 10 when the globe valve is in the fully closed state.

[0030] In this embodiment, the operation hole 10 is set as an internal hexagonal hole, and the external operation wrench correspondingly uses an internal hexagonal wrench. In other embodiments, the operation hole 10 can also be set as an internal octagonal hole or the like.

[0031] Further, define the distance between the diameter-expanded section 21 and the operation hole 10 as the wall thickness of the valve core 100. Along the direction from the first end 221 to the third end 211, the wall thickness gradually increases. In this way, the load that the gradually increasing wall thickness can bear is greater, and it is convenient for processing.

[0032] In this embodiment, a chamfer is provided at the bottom of the first sealing groove 20 close to the top end 50 of the valve core 100, and the chamfer is the diameter-expanded section 21. The process difficulty of providing the chamfer is low, and the structure is stable, which can ensure that the wall thickness of the valve core 100 is sufficient to bear the operation of the external wrench.

[0033] Exemplarily, the chamfer is set as a rounded chamfer or a right-angled chamfer, both of which can realize the gradual increase of the wall thickness of the valve core 100 at the diameter-expanded section 21, and reduce the processing difficulty and processing cost.

[0034] Along the axial direction of the valve core 100, the distance between the first end 221 and the second end 11 is H, and H satisfies: 0 < H ≤ 7 mm. In this way, H > 0 ensures that the second end 11 of the operation hole 10 close to the bottom end 60 of the valve core 100 can necessarily extend to the diameter-expanded section 21, thus ensuring the realization of the technical effect of shortening the axial length of the valve core 100. At the same time, it prevents the operation hole 10 from extending too close to the bottom end 60 of the valve core 100 and avoids its extension to the diameter section 22. The wall thickness of the valve core 100 at the diameter section 22 is relatively thin, and preventing the operation hole 10 from extending here affects the structural strength of the valve core 100.

[0035] Corresponding to the above size relationship, the height of the diameter-expanded section 21 in the axial direction of the valve core 100 is also set to at least 7 mm.

[0036] Furthermore, H satisfies: 0 < H ≤ 2 mm. Therefore, the axial length of the diameter-expanded section 21 can be set shorter to further reduce the processing cost, and it can also reduce the influence of the diameter-expanded section 21 on the sealing ring in the first sealing groove 20.

[0037] The valve core 100 is also provided with a chip removal hole 40. The chip removal hole 40 is communicated with the operation hole 10 and is located on the side of the operation hole 10 away from the top end 50 of the valve core 100. It is used to accommodate the chips generated during the processing of the operation hole 10 and serves as a tool withdrawal groove to facilitate the withdrawal of the processing tool from the operation hole 10.

[0038] Preferably, the chip removal hole 40 is coaxially arranged with the internal hexagonal hole for convenient processing.

[0039] In this embodiment, along the axial direction of the valve core 100, the chip discharge hole 40 is a cylindrical hole structure with a consistent inner diameter and extends towards the direction of the passage. The diameter of the chip discharge hole 40 is smaller than that of the operation hole 10. In this way, the chip discharge hole 40 is convenient for machining as a cylindrical hole, and the diameter of the chip discharge hole 40 is smaller than that of the operation hole 10. After its inner diameter is reduced, the distance between the hole wall of the chip discharge hole 40 and the outer peripheral wall of the valve core 100 becomes farther, and the wall thickness of the valve core 100 naturally increases, improving the structural strength of the valve core 100.

[0040] Furthermore, along the axial direction of the valve core 100, the sum of the lengths of the chip discharge hole 40 and the operation hole 10 is at least half of the axial length of the valve core 100. In this way, the weight reduction of the valve core 100 and the reduction of consumables can be achieved.

[0041] A second sealing groove 30 is further formed on the outer peripheral wall of the valve core 100. The second sealing groove 30 is located on one side of the first sealing groove 20 close to the bottom end 60 of the valve core 100, is arranged at an interval from the first sealing groove 20, and is located radially outside the chip discharge hole 40. The inner diameter of the chip discharge hole 40 is smaller than that of the operation hole 10, and no external operation wrench extends in. Therefore, the wall thickness of the valve core 100 at the second sealing groove 30 can meet the strength requirements. Sealing elements are embedded in both the two spaced first sealing groove 20 and the second sealing groove 30 to improve the sealing degree between the valve core 100 and the valve body. A stop structure is formed on the valve core 100 between the spaced first sealing groove 20 and the second sealing groove 30. This stop structure can provide a lower limit effect on the sealing element in the first sealing groove 20 and a lower limit effect on the sealing element in the second sealing groove 30.

[0042] It should be explained that the upper side here refers to the side close to the top end 50 of the valve core 100, and the lower side refers to the side close to the bottom end 60 of the valve core 100.

[0043] Furthermore, one side wall of the second sealing groove 30 close to the bottom end 60 of the valve core 100 is inclined towards the bottom end 60 of the valve core 100 relative to the depth direction of the second sealing groove 30. In this way, the groove side wall of the second sealing groove 30 can guide the sealing element into the second sealing groove 30, facilitating the installation of the sealing element.

[0044] The present utility model also provides a refrigeration system, including the stop valve as described above.

[0045] Compared with the prior art, a first sealing groove 20 for installing a sealing member is formed on a valve core 100 of a globe valve provided by the utility model, and the structure of the first sealing groove 20 is optimized to have a diameter-expanded section 21 and a diameter section 22. The wall thickness of the valve core 100 on the radially inner side corresponding to the diameter-expanded section 21 is relatively thick. Therefore, when an operation hole 10 for an external wrench to operate on the valve core 100 extends to the diameter-expanded section 21, the structural strength of the valve core 100 at the position of the diameter-expanded section 21 is high, and the valve core 100 will not be damaged due to the operation of the external wrench. Moreover, the diameter-expanded section 21 enables the opening position of the operation hole 10 to move a certain distance towards the bottom end 60 of the valve core 100 as a whole, thereby shortening the axial length of the valve core 100 and optimizing the overall size of the globe valve.

[0046] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0047] The above-described embodiments only represent several implementation manners of the utility model, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A globe valve, characterized in that, Comprising: A valve body, inside which there is a passage for the medium to flow; A valve core (100), which is installed inside the valve body and can move along the axial direction of the valve core (100) to cut off or open the passage; Wherein, the valve core (100) has a top end (50) away from the passage and a bottom end (60) close to the passage. An operation hole (10) is provided at the top end (50) of the valve core (100). A first sealing groove (20) formed by inward depression from the outer surface is provided on the outer peripheral side of the valve core (100). Along the axial direction of the valve core (100), the first sealing groove (20) includes a diameter-expanded section (21) and a diameter section (22). The diameter-expanded section (21) is located on the side of the diameter section (22) close to the top end (50) of the valve core (100), and the minimum distance D1 between the outer surface of the diameter-expanded section (21) and the axis of the valve core (100) is greater than the distance D2 between the outer surface of the diameter section (22) and the axis of the valve core (100); Along the axial direction of the valve core (100), the diameter section (22) has a first end (221) close to the top end (50) of the valve core (100) and located on the valve core (100). The operation hole (10) has a second end (11) close to the bottom end (60) of the valve core (100). The diameter-expanded section (21) has a third end (211) close to the top end (50) of the valve core (100) and located on the valve core (100). Along the axial direction of the valve core (100), the second end (11) is located between the first end (221) and the third end (211).

2. The globe valve according to claim 1, wherein Define the distance between the diameter-expanded section (21) and the operation hole (10) as the wall thickness of the valve core (100). Along the direction from the first end (221) to the third end (211), the wall thickness dimension gradually increases.

3. The globe valve according to claim 2, wherein, A chamfer is provided at the bottom of the first sealing groove (20) close to the top end (50) of the valve core (100), and the chamfer is the diameter-expanded section (21).

4. The globe valve according to claim 3, wherein The chamfer is set as a rounded chamfer or a right chamfer.

5. The globe valve according to claim 1, wherein, Along the axial direction of the valve core (100), the distance between the first end (221) and the second end (11) is H, and H satisfies: 0 < H ≤ 7 mm.

6. The globe valve according to claim 5, characterized in that, H satisfies: 0 < H ≤ 2 mm.

7. The globe valve according to claim 1, characterized in that, The valve core (100) is further provided with a chip removal hole (40). The chip removal hole (40) is set as a cylindrical hole structure. The chip removal hole (40) is communicated with the operation hole (10), is located on the side of the operation hole (10) away from the top end (50) of the valve core (100), and extends in the direction towards the passage.

8. The globe valve according to claim 7, wherein, A second sealing groove (30) is further provided on the outer peripheral wall of the valve core (100). The second sealing groove (30) is located on the side of the first sealing groove (20) close to the bottom end (60) of the valve core (100), is arranged at an interval from the first sealing groove (20), and is located radially outside the chip removal hole (40).

9. The globe valve according to claim 8, wherein, One side wall of the second sealing groove (30) close to the bottom end (60) of the valve element (100) is inclined towards the bottom end (60) of the valve element (100) relative to the depth direction of the second sealing groove (30).

10. A refrigeration system, characterized in that, Comprising a stop valve according to any one of claims 1-9.

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