Valve device and machining method thereof

Abstract

The invention provides a valve device and a machining method thereof.The valve device comprises a valve body and a valve rod, the valve body is provided with a valve cavity, a mounting hole is formed in one axial end of the valve body, a first communicating hole is formed in the other axial end of the valve body, and a second communicating hole is formed in one radial side of the valve body; the first communicating hole, the second communicating hole and the mounting hole are all communicated with the valve cavity, the valve device comprises a valve port, the valve rod is provided with an external thread, the inner wall of the corresponding part of the mounting hole is provided with an internal thread, and the external thread of the valve rod can be matched with the internal thread. The valve rod can be close to or away from the valve port in the axial direction. A blocking wall is arranged between the second communicating hole and the mounting hole in the radial direction of the valve device, and at least part of the internal threads are arranged on the blocking wall. According to the scheme, the thread meshing range can be avoided, and the thread strength is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of technical fluid control components, and in particular to a valve device and a processing method thereof. Background Art

[0002] like Fig. 9 , 10 As shown, Fig. 9 It is a structural schematic diagram of a stop valve; Fig.10 for Fig. 9 Enlarged view of area E in the middle.

[0003] The stop valve illustrated in this scheme includes a valve body 100' and a valve stem 200'. The valve body 100' is provided with a mounting hole, and the mounting hole is provided with an internal thread. The valve stem 200' is inserted into the mounting hole of the valve body 100'. The valve body 100' and the valve stem 200' are threadedly matched. The lower part of the valve stem 200' is a valve port 100a'. When the valve stem 200' rotates relative to the valve body 100', it can move downward toward the valve port 100a' to seal the valve port 100a', or move upward away from the valve port 100' to open the valve port 100a'.

[0004] The valve body 100' is provided with a connecting hole 100b' and a connecting pipe 300'. The connecting hole 100b' radially penetrates from the side of the valve body 100' and is connected to the valve cavity of the valve body 100'. The connecting pipe 300 is connected to the valve cavity through the valve port 100a'. When the valve stem 200' is threadedly rotated, the control of the valve port 100a' can control the connection and disconnection of the connecting pipe 300' and the connecting hole 100b'.

[0005] Currently, if Fig.10 As shown, when the connecting hole 100b' penetrates the valve body 100' in the radial direction, it will penetrate the hole wall of the installation hole, and the height of the penetrated part is d, so that the thread engagement range of the valve body 100' and the valve stem 200' becomes smaller, resulting in the phenomenon of slippage failure of the valve stem 200' thread. If the thread strength is to be increased, the length of the internal thread of the valve body 100' needs to be increased, that is, it is achieved by increasing the valve height, which will lead to an increase in product cost. At the same time, due to the increase in valve height, the installation space also needs to be increased. Summary of the invention

[0006] The purpose of the present application is to provide a valve device and a processing method thereof, which has a relatively long thread engagement range and ensures thread strength.

[0007] The present application provides a valve device, including a valve body and a valve stem, the valve body having a valve cavity, a mounting hole being provided at one axial end of the valve body, a first connecting hole being provided at the other axial end of the valve body, a second connecting hole being provided at one radial side of the valve body, the first connecting hole, the second connecting hole and the mounting hole all being connected to the valve cavity, the valve device including a valve port, the valve stem being provided with an external thread, a portion of the inner wall corresponding to the mounting hole being provided with an internal thread, the external thread of the valve stem being capable of cooperating with the internal thread, and the valve stem being capable of axially approaching or moving away from the valve port; along the radial direction of the valve device, a barrier wall is provided between the second connecting hole and the mounting hole, and at least a portion of the internal thread is provided on the barrier wall.

[0008] In this solution, the second connecting hole is radially spaced apart from the mounting hole by the barrier wall, that is, the second connecting hole does not penetrate the inner wall corresponding to the mounting hole. In this way, the inner wall corresponding to the mounting hole can be relatively completely provided with an internal thread to ensure the threaded engagement range of the valve stem and the valve body and to ensure the strength of the threaded connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram of a valve device in an embodiment of the present application;

[0010] Figure 2 for Figure 1 Middle AA section view;

[0011] Figure 3 for Figure 1 Right view of;

[0012] Figure 4 for Figure 1 Schematic diagram of the structure of the middle valve body;

[0013] Figure 5 for Figure 4 Enlarged view of the middle C area;

[0014] Figure 6 for Figure 1 Enlarged view of the B area;

[0015] Figure 7 for Figure 4 Middle DD section view;

[0016] Figure 8 for Figure 4 Right view:

[0017] Fig. 9 It is a structural schematic diagram of a stop valve;

[0018] Fig.10 for Fig. 9 Enlarged view of area E in the middle.

[0019] Figure 1-10 The reference numerals in the drawings are described as follows:

[0020] 100-valve body; 10a-first connecting hole; 10a1-valve port; 10b-second connecting hole; 10c-third connecting hole; 10d-mounting hole; 10e-valve cavity; 10e1-annular groove; 10e2-step; 101-first valve body; 102-second valve body; 103-third valve body; 104-fourth valve body; 1041-internal thread; 105-blocking wall;

[0021] 200-filling parts;

[0022] 300-connecting pipe;

[0023] 400-stem.

[0024] 100'-valve body; 200'-valve stem; 300'-connecting pipe; 100a'-valve port; 100b'-connecting hole; DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Please refer to Figures 1 to 3 , Figure 1 A schematic diagram of a valve device in an embodiment of the present application; Figure 2 for Figure 1 Middle AA section view; Figure 3 for Figure 1 Right view of .

[0027] The valve device in this embodiment includes a valve body 100 and a valve stem 400. The valve body 100 has a valve cavity 10e. Figure 1The valve device shown is specifically a stop valve. This solution defines that the direction in which the valve stem 400 moves relative to the valve body 100 is axial, and the direction perpendicular to the axial direction is radial. In the axial direction, the direction in which the valve stem 400 moves away from the valve port 10a1 is upward, and the direction in which the valve stem 400 moves away from the valve port 10a1 is downward. At this time, a mounting hole 10d is provided at one axial end of the valve body 100, and a first connecting hole 10a is provided at the other axial end. A second connecting hole 10b is provided on one radial side of the valve body 100. The first connecting hole 10a, the second connecting hole 10b and the mounting hole 10d are all connected to the valve cavity 10e. The port connected to the first connecting hole 10a and the valve cavity 10e is the valve port 10a1 of the valve device. In this embodiment, the first connecting hole 10a is connected to the connecting pipe 300, and the valve stem 400 is inserted into the mounting hole 10d. Part of the inner wall of the mounting hole 10d is provided with an internal thread 1041, and the valve stem 400 is provided with an external thread. The internal thread 1041 cooperates with the external thread of the valve stem 400. When the valve stem 400 is threadedly rotated relative to the valve body 100, the valve stem 400 can approach or move away from the valve port 10a1 along the axial direction, thereby blocking or opening the valve port 10a1 to control the closing or opening of the valve device.

[0028] In this embodiment Figure 1 The cross section of the illustrated valve body 100 is roughly cross-shaped, including the first valve body 101 and the fourth valve body 104 distributed vertically in the axial direction, and the second valve body 102 and the third valve body 103 distributed horizontally in the radial direction, wherein the first valve body 101 is provided with a first connecting hole 10a, the second valve body 102 is provided with a second connecting hole 10b, the third valve body 103 is provided with a third connecting hole 10c, and the fourth valve body 104 is provided with a mounting hole 10d, and the part where the four valve bodies intersect is provided with a valve cavity 10e, and the four valve bodies are roughly tubular structures. Of course, this is only an exemplary structure of the stop valve, and the valve device can also be of other structural forms.

[0029] It is worth noting that in this embodiment, a barrier wall 105 is provided between the second communication hole 10 b of the valve body 100 and the mounting hole 10 d in the radial direction, and at least part of the internal thread 1041 of the valve body 100 for cooperating with the valve stem 400 is provided on the barrier wall 105 .

[0030] Please continue to refer to Figure 4-8 As shown, Figure 4 for Figure 1 A schematic structural diagram of the middle valve body 100; Figure 5 for Figure 4 Enlarged view of the middle C area; Figure 6 for Figure 1 Enlarged view of the B area; Figure 7 for Figure 4 Middle DD section view; Figure 8 for Figure 4 Right view of .

[0031] like Figure 5 As shown, the second connecting hole 10b and the mounting hole 10d in this embodiment are radially spaced apart, and the fourth valve body 104 has a mounting hole 10d that penetrates along the axial direction. When the second connecting hole 10b penetrates the second valve body 102 radially, it maintains a certain interval with the mounting hole 10d, that is, it does not penetrate the inner wall corresponding to the mounting hole 10d. In this way, the inner wall corresponding to the mounting hole 10d can be relatively completely provided with an internal thread 1041 to ensure the threaded engagement range of the valve stem 400 and the valve body 100, and to ensure the threaded connection strength. Therefore, the valve device does not need to increase the valve height due to the strength requirement of increasing the thread.

[0032] like Figure 4 , 5 As shown, the diameter of the threaded hole section having the internal thread 1041 on the inner wall of the mounting hole 10d is defined as D 1 , the distance between the end of the second communicating hole 10b away from the valve cavity 10e and the axial center line X of the valve body 100 is defined as K, that is, Figure 4 The distance between the left end of the second valve body 102 and the axial center line X is K, and the distance between the end of the second communicating hole 10b away from the valve cavity 10e and the side of the barrier wall 105 away from the valve cavity 10e is L, that is, Figure 4 The distance between the left end of the second connecting hole 10b and the left side of the barrier wall 105 is L, then: KL>D 1 / 2. KL and D 1 The difference of / 2 is the thickness of the barrier wall 105 in the radial direction. By controlling this thickness, the overall thickness of the wall of the valve body 100 where the internal thread 1041 is arranged can be controlled to ensure that the strength meets the requirements. It can be seen that the thicker the barrier wall 105 is, the higher the strength is after the internal thread 1041 is arranged, but the thickness should not be too thick to avoid causing excessive resistance to the flow of liquid.

[0033] Look again Figure 4 In this embodiment, the valve body 100 includes an annular groove 10e1, the notch of the annular groove 10e1 is axially oriented toward the valve stem 400, and the first communication hole 10a passes through the bottom of the annular groove 10e1 to form a valve port 10a1, and meets: D 2 / 2≥KL. Among them, D 2 is the diameter of the annular groove 10e1, the center line of the annular groove 10e1 is also the axial center line X of the valve body 100, K is the distance between the end of the second communicating hole 10b away from the valve cavity 10e and the axial center line X of the valve body 100, L is the distance between the end of the second communicating hole 10b away from the valve cavity 10e and the side of the barrier wall 105 away from the valve cavity 10e, as shown in FIG. Figure 5 As shown, the arrow indicates the overlapping position, where the medium can flow into the annular groove 10e1 more smoothly. 2The difference between / 2 and KL is the distance that the annular groove 10e1 overlaps with the second connecting hole 10b in the radial direction. The annular groove 10e1 and the second connecting hole 10b remain connected. It can be seen that D 2 The larger the difference between / 2 and KL, the more overlapped the annular groove 10e1 and the second connecting hole 10b is, which is more conducive to the flow of the medium and ensures the flow rate. Figure 5 As shown, after the barrier wall 105 is set, the medium will be blocked to a certain extent when flowing through the barrier wall 105. The annular groove 10e1 and the second connecting hole 10b below the barrier wall 105 are partially overlapped to increase the flow rate of the medium at this point to compensate for the possible impact of the barrier wall 105 on the flow rate.

[0034] You can continue to refer to Figure 5 It is understood that in this embodiment, the height of the notch of the annular groove 10e1 is higher than the side of the second communicating hole 10b close to the valve port 10a1 in the axial direction, the height of the annular groove 10e1 is H, and the side of the second communicating hole 10b close to the valve port 10a1 in the axial direction is spaced h from the notch of the annular groove 10e1, that is, the bottom of the annular groove 10e1 in the axial direction is lower than the bottom of the second communicating hole 10b, and the top notch is higher than the bottom of the second communicating hole 10b, and D is satisfied at the same time. 2 / 2 and KL, which can ensure that the annular groove 10e1 and the second connecting hole 10b have more overlapping parts. It can be seen that compared with the annular groove 10e1 structure in the background technology, the annular groove 10e1 in this embodiment not only has a larger diameter D2, but also extends further upward in height, thereby further ensuring smooth flow of the medium. 2 The larger the difference between / 2 and KL and the value of h, the smoother the flow from the second connecting space 10b to the valve cavity 10e. Of course, the larger the two values, the thinner the wall of the valve body 100 becomes. Therefore, D can be designed according to the actual flow demand. 2 The difference between / 2 and KL and the value of h.

[0035] like Figure 1 As shown, the other radial side of the valve body 100 in this embodiment is provided with a third connecting hole 10c, specifically, the third valve sub-body 103 provided in the valve body 100. The third connecting hole 10c of the valve body 100 is also connected to the valve cavity 10e. A filling component 200 is provided in the third connecting hole 10c. The filling component 200 is specifically a valve core, which can fill the required medium into the valve cavity 10e. The medium is, for example, a refrigerant. In this embodiment, one end of the third connecting hole 10c close to the valve cavity 10e is connected to one end of the mounting hole 10d close to the valve cavity 10e, that is, Figure 4In the figure, the left end of the third connecting hole 10c is connected to the lower end of the mounting hole 10d, and there is no barrier wall 105 between the two like between the first connecting hole 10a and the mounting hole 10d mentioned above. The setting of the third connecting hole 10c does not affect the area range of the internal thread 1041 of the mounting hole 10d.

[0036] like Figure 4 As shown, the diameter of the third communication hole 10c is smaller than that of the second communication hole 10b, and the third communication hole 10c is coaxially arranged with the second communication hole 10b. In this way, the third communication hole 10c can stably fill the medium into the valve cavity 10e without damaging the internal thread 1041 of the inner wall corresponding to the mounting hole 10d.

[0037] It can be seen that the third communicating hole 10c in this embodiment is provided with a filling component 200, and the third communicating hole 10c can also be used for other functions. Alternatively, the valve device may not be provided with the third communicating hole 10c, and the valve device may be a valve structure other than a stop valve. The third communicating hole 10c and the second communicating hole 10b play the same role, that is, if more than one second communicating hole 10b is provided, a barrier wall 105 may also be provided between the third communicating hole 10c and the mounting hole 10d.

[0038] This embodiment also provides a method for processing a valve device, which is used to process the valve device in the above embodiment, and the specific steps are as follows:

[0039] Prepare a valve blank of the valve body 100, which may be a solid structure;

[0040] Then, the valve blank is punched in the first direction to form a mounting hole 10d, and the size of the punching is controlled according to the size design requirements of the valve device; the valve blank is punched in the second direction to form a second connecting hole 10b, and when punching the second connecting hole 10b, the hole walls of the second connecting hole 10b and the mounting hole 10d are kept at a distance. It can be seen that the steps of punching the mounting hole 10d and the second connecting hole 10b are not in order and can be performed simultaneously, or the mounting hole 10d can be punched first, or the second connecting hole 10b can be punched first, as long as the second connecting hole 10b does not penetrate the inner wall of the mounting hole 10d. In this way, the inner wall of the fourth valve body 104 used to set the internal thread 1041 can remain relatively intact. Figure 4 As shown, the mounting hole 10d in this embodiment is not actually a straight hole, and the radial dimension of the inner wall near the lower end of the valve cavity 10e is smaller, which is used to set the internal thread 1041, and the radial dimension of other parts of the inner wall is larger to facilitate the smooth insertion of the valve stem 400.

[0041] It should be noted that the first direction and the second direction are perpendicular to each other, the first direction is parallel to the axial direction of the valve body 100, and Figure 4 The middle direction is from top to bottom, and the second direction is from left to right.

[0042] In the process of processing the mounting hole 10d, the mounting hole 10d is punched in the first direction and at least a part of the valve cavity 10e is formed at the same time. That is, the axial height of the mounting hole 10d is defined as D, and the overall height of the valve cavity 10e is defined as D', and then a distance of D+D' can be directly punched in the first direction, so that the processing is more convenient and the number of punching times can be reduced.

[0043] The third communication hole 10c can also be formed by punching in the opposite direction of the second communication hole 10b. Similarly, the punching step of the third communication hole 10c and the order of forming the first communication hole 10a, the second communication hole 10b, and the installation hole 10d are not limited, and the punching can be performed according to the size requirements. Of course, if the punching is performed after the installation hole 10d and the valve cavity 10e are formed by punching in the first direction, the third communication hole 10c can be punched directly to the wall that penetrates the valve cavity 10e.

[0044] As described above, the valve cavity 10e also includes an annular groove 10e1, which can be formed by continuously punching holes in the valve cavity 10e along the first direction, that is, the portion of the valve cavity 10e close to the first connecting hole 10a is continuously expanded along the first direction, and the portion formed after the expansion is the annular groove 10e1, which is also a part of the finally formed valve cavity 10e. The annular groove 10e1 satisfies: D 2 / 2≥KL; wherein D2 is the diameter of the annular groove 10e1, K is the distance between the end of the second communicating hole 10b away from the valve cavity 10e and the axial center line X of the valve body 100, and L is the distance between the end of the second communicating hole 10b away from the valve cavity 10e and the side of the barrier wall 105 away from the valve cavity 10e.

[0045] It can be seen that when the annular groove 10e1 is not processed, the barrier wall 105 is a relatively complete annular wall portion. After the annular groove 10e1 is processed, there is a distance h between the notch of the annular groove 10e and the side of the second connecting hole 10b close to the valve port 10a1 in the axial direction. Figure 5 As shown, the barrier wall 105 and the second connecting hole 10b partially overlap, and the barrier wall 105 is not a complete circular ring. The lower end of the barrier wall 105 is cut off by the annular groove 10e1, thereby forming an arc-shaped wall with a notch at the bottom.

[0046] It can be seen that this method of forming the barrier wall 105 is simple, but the barrier wall 105 actually only needs to ensure the part where the internal thread 1041 is set. If the barrier wall 105 extends too long in the circumferential direction, it may affect the flow rate, so it is cut off and expanded through the annular groove 10e1 to eliminate the influence on the flow rate. At this time, it can be seen that the processing method is not limited to this. The valve cavity 10e can be processed without the expansion of the annular groove 10e1. When punching to form the second connecting hole 10b, the end of the second connecting hole 10b facing the valve cavity 10a can be partially processed, so that the end wall of the second connecting hole 10b corresponding to the part of the internal thread 1041 is retained, and the other parts are eliminated. It can be a small section of the arc wall of a small semicircle, which can also ensure that the range of the internal thread 1041 is not affected and reduce the influence on the medium flow. Of course, the annular groove 10e and the second connecting hole 10b are connected, and a portion of the annular shape is cut off to form a non-annular barrier wall 105, specifically a semicircular arc wall, which is simpler in terms of implementation process and has a better connection transition. The arc wall described here is viewed from the perspective of the second connecting hole 10b close to the valve cavity 10e in the radial direction, and its side surface is an arc plane. When projected along the second through hole 10b, the projection surface of the arc wall 105 is an arc, and the other side surface of the barrier wall 105 is a curved surface.

[0047] In order to further reduce the influence of the barrier wall 105 , the side of the barrier wall 105 facing the second connecting hole 10 b may be chamfered.

[0048] Please continue to refer to Figure 4 When forming the first communicating hole 10a, it is performed from bottom to top, which is opposite to the punching direction of the mounting hole 10d. Obviously, the punching step of the first communicating hole 10a is not limited. The above-mentioned step of expanding the valve cavity 10e to form the annular groove 10e1 is not limited to the first direction from top to bottom. If the operating space allows, it can also be operated from other directions, such as from the position of the first communicating hole 10a upward.

[0049] like Figure 5 As shown, a step 10e2 is further provided at the bottom of the annular groove 10e1 in this embodiment, and the lower end of the valve stem 400 is inserted into the valve port 10a1 for sealing. The setting of the step 10e2 is conducive to cooperating with the valve stem 400 to form throttling under the opening.

[0050] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A valve device, characterized in that: The invention comprises a valve body and a valve stem, wherein the valve body has a valve cavity, a mounting hole is provided at one axial end of the valve body, a first connecting hole is provided at the other axial end of the valve body, a second connecting hole is provided at one radial side of the valve body, the first connecting hole, the second connecting hole and the mounting hole are all connected to the valve cavity, the valve device comprises a valve port, the valve stem is provided with an external thread, a part of the inner wall corresponding to the mounting hole is provided with an internal thread, the external thread of the valve stem can cooperate with the internal thread, and the valve stem can approach or move away from the valve port in the axial direction; along the radial direction of the valve device, a barrier wall is provided between the second connecting hole and the mounting hole, and at least a part of the internal thread is provided on the barrier wall.

2. The valve device according to claim 1, characterized in that Projected along the second through hole, the projection surface of the barrier wall is arc-shaped.

3. The valve device according to claim 2, characterized in that The valve body includes an annular groove, and the first communicating hole passes through the bottom of the annular groove to form the valve port, and satisfies: D2 / 2≥KL; wherein D2 is the diameter of the annular groove, K is the distance between one end of the second communicating hole away from the valve cavity and the axial center line of the valve body, and L is the distance between one end of the second communicating hole away from the valve cavity and one side of the barrier wall away from the valve cavity.

4. The valve device according to claim 3, characterized in that The second communicating hole is located at a side close to the valve port in the axial direction and has a spacing from the notch of the annular groove, and the notch of the annular groove is closer to the valve stem.

5. The valve device according to any one of claims 1 to 4, characterized in that: A third connecting hole is provided on the other radial side of the valve body, the third connecting hole is connected to the valve cavity, a filling component is provided in the third connecting hole, and one end of the third connecting hole close to the valve cavity is connected to one end of the mounting hole close to the valve cavity.

6. The valve device according to claim 5, characterized in that The diameter of the third communicating hole is smaller than that of the second communicating hole, and the third communicating hole is coaxially arranged with the second communicating hole.

7. The valve device according to claim 6, characterized in that A filling component is arranged in the third communicating hole.

8. A method for processing a valve device, characterized in that: Used for processing the valve device according to any one of claims 1 to 7, comprising: Prepare a valve blank of the valve body, punch the valve blank along a first direction to form the mounting hole, punch the valve blank along a second direction to form a second connecting hole, and keep a radial distance between the second connecting hole and the mounting hole; wherein the first direction and the second direction are perpendicular, and the first direction is parallel to the axial direction of the valve body.

9. The method for processing a valve device according to claim 8, characterized in that: The first mounting hole is punched along the first direction and at the same time at least a portion of the valve cavity is formed.

10. The method for processing a valve device according to claim 8 or 9, characterized in that: A third connecting hole is formed by punching in the opposite direction to the direction in which the second connecting hole is formed; and / or, an annular groove is formed by continuing to punch in the valve cavity along the first direction, and the following conditions are satisfied: D2 / 2≥KL; wherein D2 is the diameter of the annular groove, K is the distance between the end of the second connecting hole away from the valve cavity and the axial center line of the valve body, and L is the distance between the end of the second connecting hole away from the valve cavity and the side of the barrier wall away from the valve cavity.

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