Valve element and stop valve with same

Abstract

The valve element comprises a body, the body is provided with a sealing end and an operation end which are oppositely arranged, the operation end is provided with a first operation hole and a second operation hole which are communicated with each other, and the second operation hole is located at the end, close to the sealing end, of the first operation hole. The inner diameter of the second operation hole is smaller than that of the first operation hole; the outer surface of the body sinks inwards to form a containing groove, the sealing ring is arranged in the containing groove, the containing groove is annularly formed in the outer side wall of the body, the containing groove is provided with a first inner wall and a second inner wall which are arranged in the extending direction of the body in a spaced mode, and the distance between the first inner wall and the operation end is L1. The distance from a port, close to one side of the operation end, of the second operation hole to the operation end is L2, and L2 is smaller than or equal to L1. According to the technical scheme, the problem that the side wall of a valve element of a stop valve in the prior art is prone to breakage can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to control valve technical field, specifically, relate to a valve core and have its stop valve. BACKGROUND

[0002] At present, in the refrigeration system, usually use stop valve control refrigerant fluid on-off, stop valve is equipped with valve core, valve core can move relative to the valve port of stop valve, to block or open the valve port.

[0003] In order to be able to screw valve core, usually set up the operating hole for spanner to extend on valve core, however, in order to facilitate the processing forming of valve core, usually use copper alloy to process valve core, this leads to the operating hole to appear silk when cooperating with spanner, influence valve core's regulating function. In the prior art, usually set up two operating holes of different sizes coaxially on valve core, to match different size spanners, when one operating hole appears silk, can use another operating hole, improve the serviceability of valve core. At the same time, in order to guarantee the sealing between valve core and valve body, usually set up the accommodating groove recessed inward on the outer wall of valve core, and install sealing ring in accommodating groove. Thus, under the premise that the size of valve core remains unchanged, need to process operating hole in valve core inside, process accommodating groove on the outside of valve core, can reduce the thickness of valve core side wall, increase the possibility of rupture of valve core under high pressure working condition or frequent operation condition. SUMMARY

[0004] The utility model provides a valve core and have its stop valve to solve the problem that the valve core side wall of prior art stop valve is easy to break.

[0005] According to one aspect of the utility model, a valve core is provided, the valve core comprises: a body, the body has oppositely arranged sealing end and operating end, the operating end has first operating hole and second operating hole in communication with each other, the second operating hole is located at one end of the first operating hole close to the sealing end, and the inner diameter of the second operating hole is smaller than that of the first operating hole;Accommodating groove recessed inward from the outer surface of the body, the accommodating groove is annularly arranged on the outer side wall of the body, the accommodating groove has first inner wall and second inner wall spaced apart along the extension direction of the body, along the axial direction of the body, the first inner wall is located on the side of the second inner wall away from the sealing end, the distance from the first inner wall to the end face of the operating end is L1, and the distance from the port of the second operating hole close to the side of the operating end to the end face of the operating end is L2, L2≤L1.

[0006] The technical scheme of the utility model can replace the wrenches of different specifications when one of the first operation hole and the second operation hole matches the wrench and the wire appears to slip, so that the other one of the first operation hole and the second operation hole is used to twist the valve core, and the adaptability of the valve core is improved. Meanwhile, because the inner diameter of the first operation hole is larger than the inner diameter of the second operation hole, the thickness of the side wall of the body at the first operation hole is smaller than the thickness of the side wall at the second operation hole, the application sets L2<=L1, that is, in the direction perpendicular to the axis of the body, the projection of the accommodating groove does not coincide with the first operation hole, so that the accommodating groove can be arranged outside the second operation hole, so that the wall thickness of the first operation hole reduced by the accommodating groove is compensated, so that the structural strength of the valve core is ensured, and the risk of breakage of the valve core wall is reduced.

[0007] Further, the distance from the second inner wall to the end face of the sealing end is L3, the distance from the port of the second operation hole close to the sealing end to the end face of the sealing end is L4, and L4<=L3.

[0008] Further, the outer side wall of the body has a first protrusion and a second protrusion, the first protrusion and the second protrusion are arranged in the axial direction of the body, and the first protrusion, the second protrusion and the outer side wall of the body cooperate to form an accommodating groove.

[0009] Further, the first protrusion is located on the side of the second protrusion close to the operation end, the first protrusion has a tapered section, the outer diameter of the tapered section gradually increases in the direction from the first protrusion to the second protrusion, and the taper angle between the side wall of the tapered section and the body is between 110° and 130°.

[0010] Further, the first operation hole and the second operation hole are coaxially arranged, and the first operation hole and the second operation hole are internal hexagonal screw holes, the inner wall of the first operation hole has a plurality of first wall surfaces arranged in a ring shape, the inner wall of the second operation hole has a plurality of second wall surfaces arranged in a ring shape, the plurality of first wall surfaces and the plurality of second wall surfaces are arranged one by one, and the first wall surfaces and the second wall surfaces arranged correspondingly are parallel to each other.

[0011] Further, the depth of the first operation hole is H1, and H1>=4mm; the depth of the second operation hole is H2, and H1>=4mm.

[0012] Further, the distance between the first inner wall and the second inner wall is less than or equal to the depth of the second operation hole.

[0013] Further, the groove bottom of the accommodating groove has a first transition section, a straight section and a second transition section connected in sequence, the first transition section is located on the side of the straight section close to the first inner wall, the second transition section is located on the side of the straight section close to the second inner wall, the wall thickness of the body at the first transition section gradually increases in the direction from the straight section to the first inner wall, and the wall thickness of the body at the second transition section gradually increases in the direction from the straight section to the second inner wall.

[0014] Further, the wall thickness of the body at the maximum diameter of the first transition section and the second transition section is D1, and the wall thickness of the body at the straight section is D2, 0.9≤D2 / D1≤0.95.

[0015] According to another aspect of the present application, a stop valve is provided, which has the valve core described above.

[0016] By applying the valve core described above in the stop valve provided by the present application, when one of the first operation hole and the second operation hole is matched with a wrench to cause a slip, a wrench of different specifications can be replaced to use the other one of the first operation hole and the second operation hole to screw the valve core, so that the use performance of the valve core can be effectively improved, and the overall assembly and disassembly of the stop valve are facilitated; meanwhile, the volume of the valve core can be reduced as much as possible, which is conducive to the miniaturization of the overall stop valve. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and the explanation thereof serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 Fig. 1 shows a structure schematic view of a valve core provided by the present application;

[0019] Figure 2 Fig. 2 shows a size schematic view of the valve core provided by the present application;

[0020] Figure 3 Fig. 3 shows a top view of the valve core provided by the present application;

[0021] Figure 4 Fig. 4 shows a sectional view of the valve core provided by the present application; Figure 1 Fig. 5 shows an enlarged view of part A in Fig. 4.

[0022] In the above drawings, the following reference signs are used:

[0023] 100, body; 101, sealing end; 102, operation end;

[0024] 110, first operation hole; 111, first wall surface;

[0025] 120, second operation hole; 121, second wall surface;

[0026] 130, clamping hole;

[0027] 200, accommodating groove; 201, first inner wall; 202, second inner wall; 203, first transition section; 204, straight section; 205, second transition section;

[0028] 210, first protrusion; 211, conical section; 220, second protrusion. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the utility model.

[0030] As shown in Figure 1 and Figure 2 The utility model embodiment provides a valve core, the valve core has the body 100 and forms the accommodating groove 200 from the inner recess of the body 100 outer surface, wherein, the body 100 has the sealing end 101 and the operating end 102 of relative arrangement, the operating end 102 has the first operating hole 110 and the second operating hole 120 of mutual communication, the second operating hole 120 is located in the one end of the first operating hole 110 close to the sealing end 101, and the inner diameter of the second operating hole 120 is less than the inner diameter of the first operating hole 110. The sealing ring is arranged in the accommodating groove 200, the accommodating groove 200 annularly sets up on the lateral wall of the body 100, the accommodating groove 200 has the first inner wall 201 and the second inner wall 202 of interval arrangement along the extension direction of the body 100, along the axial direction of the body 100, the first inner wall 201 is located in the one side of the second inner wall 202 away from the sealing end 101, the distance of the first inner wall 201 to the end face of the operating end 102 is L1, and the distance of the port of the second operating hole 120 close to the one side of the operating end 102 to the end face of the operating end 102 is L2, L2≤L1.

[0031] The technical scheme of the utility model discloses, the first operation hole 110 and the second operation hole 120 that are mutually connected are arranged on the body 100, the inner diameter of the first operation hole 110 is greater than the inner diameter of the second operation hole 120, when one of the first operation hole 110 and the second operation hole 120 is matched with spanner and appears slip wire, different specification spanners can be replaced, to use the other of the first operation hole 110 and the second operation hole 120 to twist the valve core, improve the adaptability of valve core.Simultaneously, because the inner diameter of the first operation hole 110 is greater than the inner diameter of the second operation hole 120, the thickness of the lateral wall of the body 100 at the first operation hole 110 will be less than the thickness of the lateral wall at the second operation hole 120, the application is through setting L2≤L1, namely in the direction perpendicular to the axis of the body 100, the projection of the containing groove 200 and the first operation hole 110 do not coincide, so that the containing groove 200 can be arranged on the outside of the second operation hole 120, so as to make up the wall thickness of the first operation hole 110 reduced by the containing groove 200, to ensure the structural strength of the valve core, reduce the risk of rupture of the valve core wall.

[0032] Further, the distance from the second inner wall 202 to the end face of the sealing end 101 is L3, the distance from the port of the second operation hole 120 close to the sealing end 101 to the end face of the sealing end 101 is L4, and L4≤L3.Through the above setting, L4≤L3 is ensured while L2≤L1, that is, in the direction perpendicular to the axis of the body 100, the containing groove 200 does not coincide with the projection of the second operation hole 120 completely, the wall thickness size is guaranteed, and in the action process of the valve core, the sealing ring needs to be kept in sealing cooperation with the inner wall of the valve body, and in the application, the range of the containing groove 200 is limited between the two ends of the second operation hole 120, without extending the length of the body 100, under the premise of ensuring the wall thickness of the first operation hole 110 and the second operation hole 120, it is beneficial to realize the miniaturization of the valve core and the stop valve.

[0033] In a specific embodiment of the application, the containing groove 200 can be directly grooved on the outer lateral wall of the body 100.

[0034] Specifically, the distance between the first inner wall 201 and the second inner wall 202 is less than or equal to the depth of the second operation hole 120.Through the above setting, it can be guaranteed that the containing groove 200 is completely located on the outside of the second operation hole 120, and the miniaturization of the valve core is realized under the premise of ensuring the wall thickness of the first operation hole 110 and the second operation hole 120.

[0035] Reference Figure 4As shown, the groove bottom of the accommodating groove 200 has a first transition section 203, a straight section 204 and a second transition section 205 connected in sequence, the first transition section 203 is located at one side of the straight section 204 close to the first inner wall 201, and the second transition section 205 is located at one side of the straight section 204 close to the second inner wall 202, the wall thickness of the body 100 at the first transition section 203 gradually increases in the direction along the straight section 204 to the first inner wall 201, and the wall thickness of the body 100 at the second transition section 205 gradually increases in the direction along the straight section 204 to the second inner wall 202. Through the above arrangement, the first transition section 203 and the second transition section 205 can adapt to the shape of the sealing ring, thereby reducing the gap between the sealing ring and the inner wall of the accommodating groove 200, limiting the sealing ring, and improving the cooperation effect of the sealing ring and the valve core.

[0036] Specifically, the first transition section 203 and the second transition section 205 can be a fillet structure or a chamfer structure, which can better fit the sealing ring.

[0037] Specifically in the present application, when L1=L2, L3=L4, since the wall thickness size corresponding to the second operation hole 120 at the first transition section 203 and the second transition section 205 gradually changes, when the distance L1=L2, L3=L4, the accommodating groove 200 has less effect on the wall thickness.

[0038] In the present application, the wall thickness of the body 100 at the maximum diameter of the first transition section 203 and the second transition section 205 is D1, the wall thickness of the body 100 at the straight section 204 is D2, and 0.9≤D2 / D1≤0.95. In this way, the range of the wall thickness size corresponding to the second operation hole 120 at the first transition section 203 and the second transition section 205 is smaller, which will not excessively affect the wall thickness at the second operation hole 120. Specifically, the value of D2 / D1 can be 0.9, 0.92, 0.93 or 0.95.

[0039] In still another specific embodiment of the present application, the outer side wall of the body 100 has a first protrusion 210 and a second protrusion 220 in the form of a ring, the first protrusion 210 and the second protrusion 220 are arranged in the axial direction of the body 100, and the side wall of the first protrusion 210 towards the side of the second protrusion 220, the side wall of the second protrusion 220 towards the side of the first protrusion 210 and the outer side wall of the body 100 cooperate to form the accommodating groove 200. Through the above arrangement, the depth of the accommodating groove 200 can be deepened, the effect of accommodating the sealing ring in the accommodating groove 200 can be ensured, and the sealing ring can be prevented from falling off; and compared with the scheme of directly grooving on the outer side wall of the body 100, the wall thickness of the body 100 at the first operation hole 110 and the second operation hole 120 can be further ensured.

[0040] Specifically, the first protrusion 210 is located at one side of the second protrusion 220 close to the operation end 102, and the first protrusion 210 has a tapered section 211, and the outer diameter of the tapered section 211 gradually increases in the direction from the first protrusion 210 to the second protrusion 220. Through the above arrangement, during the installation process, the sealing ring can be placed on the first protrusion 210 first, and the sealing ring is moved in the direction from the first protrusion 210 to the second protrusion 220, and the tapered section is used to gradually deform the sealing ring to pass through the first protrusion 210 into the accommodating groove 200, which plays a guiding role for the sealing ring and facilitates the installation of the sealing ring.

[0041] Specifically, the taper angle of the side wall of the tapered section 211 is between 110° and 130°. When the taper angle of the tapered section 211 is less than 110°, the portion with a smaller diameter of the first protrusion 210 at the tapered section 211 will increase, and the structural strength of the first protrusion 210 can be ensured without increasing the thickness of the first protrusion 210 in the axial direction, thereby reducing the risk of fracture of the first protrusion 210. When the taper angle of the tapered section 211 is greater than 130°, the transition of the first protrusion 210 at the tapered section 211 is insufficient, and the guiding requirement for the sealing ring cannot be effectively met. By setting the taper angle of the tapered section 211 to be between 110° and 130°, the structural stability and guiding effect of the first protrusion 210 can be effectively ensured. Specifically, the taper angle of the tapered section 211 can be set to 110°, 120° or 130°.

[0042] Specifically in the present application, referring to Figure 3 As shown in the figure, the first operation hole 110 and the second operation hole 120 are coaxially arranged, and the first operation hole 110 and the second operation hole 120 are inner hexagonal screw holes. The inner wall of the first operation hole 110 has a plurality of first wall surfaces 111 arranged in a ring shape, the inner wall of the second operation hole 120 has a plurality of second wall surfaces 121 arranged in a ring shape, and the plurality of first wall surfaces 111 and the plurality of second wall surfaces 121 are arranged one by one in correspondence. The first wall surface 111 and the second wall surface 121 arranged correspondingly are parallel to each other. In this way, when the first operation hole 110 and the second operation hole 120 are machined on the body 100, the same positioning reference can be used for the first operation hole 110 and the second operation hole 120, and the body 100 does not need to be clamped multiple times, thereby improving the machining efficiency.

[0043] Further, the first operation hole 110 and the second operation hole 120 can also be arranged as other forms of matching holes, such as triangular holes, plum blossom holes or long-waisted holes, etc.

[0044] The valve core provided in the present application can be made of stainless steel material, which can improve the structural strength of the valve core and reduce the possibility of wire slipping of the first operation hole 110 and the second operation hole 120 compared with the copper alloy material in the traditional technical solution.

[0045] Specifically, the valve core can be integrally turned.

[0046] Specifically, the depth of the first operation hole 110 is H1, and H1≥4mm. When H1<4mm, the depth of the first operation hole 110 is small, and when cooperating with the wrench, the area of the inner wall surface of the first operation hole 110 matched with the wrench is small, and the first operation hole 110 is more prone to slippage. In the present application, by setting H1≥4mm, the risk of slippage of the first operation hole 110 can be reduced. Specifically, H1 can be set to 4mm, 5mm or 6mm.

[0047] Specifically, the depth of the second operation hole 120 is H2, and H1≥4mm. When H2<4mm, the depth of the second operation hole 120 is small, and when cooperating with the wrench, the area of the inner wall surface of the second operation hole 120 matched with the wrench is small, and the second operation hole 120 is more prone to slippage. In the present application, by setting H2≥4mm, the risk of slippage of the second operation hole 120 can be reduced. Specifically, H2 can be set to 4mm, 5mm or 6mm.

[0048] In the present application, the end face of the sealing end 101 is provided with a clamping hole 130, and the inner diameter of the clamping hole 130 gradually decreases along the direction from the operation end 102 to the operation end 102. Through the above setting, the clamping hole 130 can conveniently clamp the body 100 by the clamp, and the inner diameter of the clamping hole 130 gradually decreases along the direction from the operation end 102 to the operation end 102 to form a tapered hole, which can guide the clamping tool to abut at the deepest part of the tapered hole to provide stable clamping effect. Specifically, the clamping hole 130 can be coaxially arranged with the first operation hole 110 and the second operation hole 120 to provide the same positioning reference for the first operation hole 110 and the second operation hole 120, and facilitate the machining of the body 100.

[0049] According to another aspect of the present application, a stop valve is provided, which has the above-mentioned valve core.

[0050] By applying the above-mentioned valve core in the stop valve provided by the present application, when one of the first operation hole 110 and the second operation hole 120 cooperates with the wrench to cause slippage, a wrench of different specifications can be replaced to use the other one of the first operation hole 110 and the second operation hole 120 to rotate the valve core, which can effectively improve the use performance of the valve core, facilitate the overall assembly and disassembly of the stop valve; at the same time, the volume of the valve core can be reduced as much as possible, which is beneficial to the miniaturization of the overall stop valve.

[0051] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0052] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments are not intended to limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportion relationship for the convenience of description. The technology, methods and devices known to those skilled in the related art can not be discussed in detail, but should be considered as part of the specification under appropriate circumstances. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so further discussion is not needed in subsequent drawings once an item is defined in one drawing.

[0053] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0054] For purposes of the description hereinafter, spatial relative terms, such as "above", "below", "upper", "lower", and the like, can be used to describe the relative position of one element or feature to another as illustrated in the figures. It will be understood that the spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "up" other elements or features would then be oriented "below" or "down" the other elements or features. Thus, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatial relative descriptors used herein interpreted accordingly.

[0055] In addition, it should be noted that the use of "first", "second", and the like words of distinction do not connote any meaning of importance, but are used solely to differentiate one element from another, and are used in the context of this application without implying any specific order, or order of precedence. Accordingly, a first element that follows an operation can be performed before, after, or at the same time as a second element that precedes the operation.

[0056] The preferred embodiments of the present application have been described above with the purpose of enabling not only the best modes of practicing the application known to the inventors at this time, but also of enabling others skilled in the art to utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated. Therefore, the above description is intended to be illustrative, but not restrictive, of the scope of the present application. All patents and patent applications mentioned herein are incorporated by reference in their entirety.

Claims

1. A valve core characterized in that, The valve core comprises: A body (100) having a sealing end (101) and an operating end (102) arranged oppositely, the operating end (102) having a first operating hole (110) and a second operating hole (120) communicating with each other, the second operating hole (120) being located at one end of the first operating hole (110) close to the sealing end (101), and the inner diameter of the second operating hole (120) being smaller than that of the first operating hole (110); A containing groove (200) formed by recessing inward from the outer surface of the body (100), the containing groove (200) being annularly arranged on the outer side wall of the body (100), the containing groove (200) having a first inner wall (201) and a second inner wall (202) arranged at intervals along the extension direction of the body (100), the first inner wall (201) being located on the side of the second inner wall (202) away from the sealing end (101) in the axial direction of the body (100), the distance from the first inner wall (201) to the end face of the operating end (102) being L1, and the distance from the port of the second operating hole (120) close to the operating end (102) to the end face of the operating end (102) being L2, L2≤L1.

2. The valve core according to claim 1, characterized in that The distance from the second inner wall (202) to the end face of the sealing end (101) is L3, and the distance from the port of the second operating hole (120) close to the sealing end (101) to the end face of the sealing end (101) is L4, L4≤L3.

3. The valve core of claim 1, wherein The outer side wall of the body (100) has a first protrusion (210) and a second protrusion (220) arranged annularly, the first protrusion (210) and the second protrusion (220) being arranged at intervals along the axial direction of the body (100), and the first protrusion (210), the second protrusion (220) and the outer side wall of the body (100) cooperating to form the containing groove (200).

4. The valve core according to claim 3, characterized in that The first protrusion (210) is located on the side of the second protrusion (220) close to the operating end (102), the first protrusion (210) has a tapered section (211), the outer diameter of the tapered section (211) gradually increasing in the direction from the first protrusion (210) to the second protrusion (220), and the taper angle formed between the side wall of the tapered section (211) and the body (100) being between 110° and 130°.

5. The valve core of claim 1, wherein The first operating hole (110) and the second operating hole (120) are coaxially arranged, and the first operating hole (110) and the second operating hole (120) are hexagonal screw holes, the inner wall of the first operating hole (110) has a plurality of first wall surfaces (111) arranged annularly, the inner wall of the second operating hole (120) has a plurality of second wall surfaces (121) arranged annularly, the plurality of first wall surfaces (111) and the plurality of second wall surfaces (121) are arranged one-to-one correspondingly, and the corresponding first wall surface (111) and the corresponding second wall surface (121) are parallel to each other.

6. The valve core of claim 1, wherein The first operation hole (110) has a depth of H1, H1≥4mm; the second operation hole (120) has a depth of H2, H1≥4mm.

7. The valve core of claim 1, wherein The distance between the first inner wall (201) and the second inner wall (202) is less than or equal to the depth of the second operation hole (120).

8. The valve core of claim 1, wherein, The bottom of the accommodating groove (200) has a first transition section (203), a straight section (204) and a second transition section (205) connected in sequence, the first transition section (203) is located on the side of the straight section (204) close to the first inner wall (201), the second transition section (205) is located on the side of the straight section (204) close to the second inner wall (202), the wall thickness of the body (100) at the first transition section (203) gradually increases in the direction from the straight section (204) to the first inner wall (201), and the wall thickness of the body (100) at the second transition section (205) gradually increases in the direction from the straight section (204) to the second inner wall (202).

9. The valve core of claim 8, wherein, The wall thickness of the body (100) at the maximum diameter of the first transition section (203) and the second transition section (205) is D1, the wall thickness of the body (100) at the straight section (204) is D2, and 0.9≤D2 / D1≤0.

95.

10. A stop valve characterized by comprising: The stop valve has a valve core as claimed in any one of claims 1 to 9.

Images