Sliding type reversing valve

Abstract

The utility model discloses a sliding type reversing valve which comprises a valve body component, the valve body component comprises a valve body, a first end cover and a valve element component, and the valve element component is partially located in an inner cavity of the valve body; the first end cover comprises a first barrel, a first barrel and a first step part, in the axial projection direction of the first barrel, the inner contour of the projection plane of the first barrel is located in the inner contour of the projection plane of the first barrel, the inner contour of the projection plane of the first barrel is non-circular, the valve element component comprises a first piston, and the first piston is located in the first barrel. The first piston is positioned in a first piston cavity of the first end cover; the first end cover further comprises a first flanging part. According to the sliding type reversing valve, the first flanging part of the first end cover is located in the valve body, so that the length of the valve body part can be reduced, the switching time of the sliding type reversing valve can be shortened under the same pressure, and the reversing efficiency of the sliding type reversing valve is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerant switching valves for refrigeration systems, and more particularly to a sliding reversing valve. Background Art

[0002] In a refrigeration system, a sliding reversing valve is used to switch between a refrigeration mode and a heating mode. Figure 1 FIG. is a schematic cross-sectional view of a sliding reversing valve in the background art. As Figure 1 shown, the sliding reversing valve includes a valve body, an end cover 6, a valve seat 5, and a valve core component. The end cover 6 is fixed to the axial end of the valve body. The valve seat 5 is located in the inner cavity of the valve body. The valve core component includes a slider 2, a piston rod 3, and a piston 4. The slider 2 abuts against the upper end surface of the valve seat 5. The piston rod 3 is connected to the slider 2. The end of the piston rod 3 facing away from the slider 2 is connected to the piston 4. The sliding reversing valve realizes commutation by changing the relative position between the valve core component and the valve body through a pressure difference. The longer the length of the inner cavity, not only the stroke length of the piston 4 is longer, but also the volume of the inner cavity is larger. The size of the piston 4 needs to match the size of the inner cavity. When the contact surface area between the piston and the fluid is larger, the pressure difference force of the same mass and volume of fluid entering the cavity will decrease, affecting the commutation efficiency. Therefore, how to improve the commutation efficiency of the sliding reversing valve is a problem that those skilled in the art need to pay attention to. Summary of the Utility Model

[0003] A sliding reversing valve provided by the utility model includes a valve body component. The valve body component includes a valve body, a first end cover, and a valve core component. The valve core component is partially located in the inner cavity of the valve body. The first end cover includes a first cylinder, a first barrel, and a first step portion. In the projection direction of the first cylinder along the axis, the inner contour of the projection surface of the first barrel is located within the inner contour of the projection surface of the first cylinder. The inner contour of the projection surface of the first barrel is non-circular. The valve core component includes a first piston. The first piston is located in the first piston cavity of the first end cover. The first cylinder can allow the first piston to slide. The first piston can abut against the first step portion. The first end cover further includes a first flanging portion. The first barrel is farther from the valve body than the first cylinder. The first flanging portion is farther from the first barrel than the first cylinder. The first flanging portion is located in the valve body. The first flanging portion includes a first side portion and a first connecting portion. The first side portion is connected to the first cylinder. The first connecting portion extends radially from the first cylinder towards the inner wall of the valve body. The first side portion is connected to the first connecting portion. The first side portion extends towards the first barrel from the first connecting portion. The first side portion is fixedly connected to the inner wall of the valve body.

[0004] The sliding reversing valve provided in this application has the first flanging part of the first end cover located inside the valve body, which can reduce the length of the valve body components. Moreover, the first barrel reduces the contact area between the first piston and the first cylinder body, so that the switching time of the sliding reversing valve can also be shortened under the same pressure, further improving the reversing efficiency of the sliding reversing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 : A schematic cross-sectional view of a sliding reversing valve in the background art;

[0006] Figure 2 : A schematic cross-sectional view of the sliding reversing valve provided by the present utility model;

[0007] Figure 3 : Figure 2 A three-dimensional schematic view of the first end cover in ;

[0008] Figure 4 : Figure 2 A schematic cross-sectional view of the first end cover in ;

[0009] Figure 5 : Figure 2 A schematic view of part A in ;

[0010] Figure 6 : Figure 5 A schematic cross-sectional view of B-B in ;

[0011] Figure 7 : Figure 2 A schematic cross-sectional view of the second end cover in.

[0012] Figure 2-7 Reference numerals in the drawings: 1-valve body, 101-inner cavity, 11-valve seat,

[0013] 2-first end cover, 201-first piston cavity, 21-first flanging part, 211-first edge part, 212-first connecting part, 213-groove part, 214-end face, 2141-transition face, 22-first cylinder body, 23-first step part, 24-first barrel, 25-side hole, 251-extension section,

[0014] 3-spool component, 31-first piston, 311-sealing bowl, 312-base, 3121-seat surface, 32-piston rod, 33-first connecting piece, 34-second connecting piece, 35-reversing seat, 36-second piston,

[0015] 4-capillary tube,

[0016] 5-second end cover, 501-second piston cavity, 51-second flanging part, 511-second edge part, 512-second connecting part, 52-second cylinder body, 53-second step part, 54-second barrel,

[0017] 6 - Pilot valve,

[0018] L - Center line. Detailed implementation mode

[0019] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. The upper, lower and other orientation words involved in this article are defined according to the Figure 2 relative positions of the components shown in the drawings, only for the sake of clarity and convenience of expressing the technical solution. It should be understood that the orientation words adopted in this article should not limit the scope of protection requested by this application.

[0020] Figure 2 It is a schematic cross-sectional view of the sliding reversing valve provided by the present utility model; Figure 3 It is Figure 2 a three-dimensional schematic view of the first end cover in Figure 4 It is Figure 2 a schematic cross-sectional view of the first end cover in Figure 5 It is Figure 2 a schematic view of part A in Figure 6 It is Figure 5 a schematic cross-sectional view of B - B in Figure 7 It is Figure 2 a schematic cross-sectional view of the second end cover in

[0021] In this embodiment, it is defined that the axial direction of the valve body 1 shown in Figure 2 and the axial direction of the first cylinder 22 of the first end cover 2 are the transverse direction of the sliding reversing valve.

[0022] As shown in the figure, the sliding reversing valve of this embodiment is illustrated by taking a stainless steel four-way sliding reversing valve as an example. The sliding reversing valve is installed in the refrigeration system and realizes commutation through differential pressure force to switch between the refrigeration mode and the heating mode. It includes a valve body component and a pilot valve 6. The valve body component includes a valve body 1, a first end cover 2, a spool component 3, and a second end cover 5. The valve body 1, the first end cover 2, and the second end cover 5 are made of stainless steel. Horizontally in the valve body 1, the first end cover 2 and the second end cover 5 are arranged oppositely. The first end cover 2 and the second end cover 5 are partially located at the ends of the valve body 1, and the first end cover 2 and the second end cover 5 are fixedly connected to the valve body 1 by welding. The valve body component further includes a valve seat 11, and the valve seat 11 is fixedly connected to the inner wall of the valve body 1. The valve body 1 has an inner cavity 101. Part of the spool component 3 is located in the inner cavity 101 of the valve body 1. The spool component 3 includes a first piston 31 and a second piston 36. The first piston 31 is located at the first end cover 2, and the second piston 36 is located at the second end cover 5. The pilot valve 6 is installed outside the valve body 1 and is communicated with the inside of the corresponding end cover through a capillary tube 4 so that the fluid medium for driving the first piston 31 or the second piston 36 at the corresponding position to move enters the inside of the end cover.

[0023] The spool component 3 further includes a piston rod 32, a connecting piece, and a commutation seat 35. The commutation seat 35 is at least partially arranged in the inner cavity 101 and can slide relative to the valve seat 11. Horizontally in the valve body 1, the piston rod 32 is connected to the commutation seat 35 in the middle. One end of the piston rod 32 is connected to the first piston 31, and the other end of the piston rod 32 is connected to the second piston 36. The connecting piece includes a first connecting piece 33 and a second connecting piece 34. The second connecting piece 34 is used to connect the first piston 31 and the piston rod 32.

[0024] In this embodiment, the first end cover 2 is cylindrical. The first end cover 2 includes a first cylinder body 22, a first barrel body 24, and a first step portion 23. In the projection direction of the axis of the first cylinder body 22, the inner contour of the projection surface of the first barrel body 24 is located inside the inner contour of the projection surface of the first cylinder body 22. That is, radially in the first cylinder body 22, the cross-sectional area of the inner contour of the first barrel body 24 is smaller than the cross-sectional area of the inner contour of the first cylinder body 22. The inner contour of the projection surface of the first barrel body 24 is non-circular. The spool component 3 includes a first piston 31. The first piston 31 is located in the first piston cavity 201 of the first end cover 2. The first cylinder body 22 can allow the first piston 31 to slide, and the first piston 31 can abut against the first step portion 23. The first end cover 2 further includes a first flanging portion 21. The first barrel body 24 is farther from the valve body 1 than the first cylinder body 22, and the first flanging portion 21 is farther from the first barrel body 24 than the first cylinder body 22. The valve body 1 is circular tubular. The first flanging portion 21 is located inside the pipe wall of the valve body 1, and the first flanging portion 21 is fixedly connected to the inner wall of the end of the valve body 1. Part of the first cylinder body 22 is located inside the pipe wall of the valve body 1. This is to improve the commutation efficiency of the sliding reversing valve.

[0025] The first piston 31 includes a sealing bowl 311 and a base 312. The base 312 has a seat surface 3121 on the side close to the first barrel 24. The first piston 31 can abut against the step surface 231 of the first step portion 23 on the side away from the first barrel 24 through the seat surface 3121, that is, the sliding type reversing valve switches from the refrigeration mode to the heating mode / from the heating mode to the refrigeration mode and the switching is in place, and waits for the next reversing start. Considering that the cross-sectional areas of the inner contours of the first barrel 24 and the first cylinder 22 are different, it should be noted that along the projection direction of the axis of the first cylinder 22, the projection surface of the inner contour of the first barrel 24 is located within the projection surface of the outer contour of the base 312. It can be understood that the smaller the range of the projection surface of the inner contour of the first barrel 24 on the projection surface of the outer contour of the base 312, the faster the sliding speed of the first piston 31, and the higher the reversing efficiency of the sliding type reversing valve.

[0026] At the same time, along the projection direction of the axis of the first cylinder 22, the inner contour of the projection surface of the first cylinder 22 is located within the inner contour of the projection surface of the valve body 1. It can be understood that if the cross-sectional area of the first cylinder 22 in its radial direction is smaller, the size of the first piston 31 can be correspondingly reduced, and the contact area between the first piston 31 and the inner wall of the first cylinder 22 can be reduced, and the friction between the first piston 31 and the first cylinder 22 can be reduced, so as to better improve the reversing efficiency.

[0027] In this embodiment, the first flanging portion 21 includes a first side portion 211 and a first connecting portion 212. The first side portion 211 is connected to the first cylinder 22. The first connecting portion 212 extends from the first cylinder 22 radially towards the inner wall of the valve body 1. The first side portion 211 is connected to the first connecting portion 212. The first side portion 211 extends from the first connecting portion 212 towards the side close to the first barrel 24, and the first side portion 211 is fixedly connected to the inner wall of the valve body 1.

[0028] There is a groove portion 213 between the first side portion 211 and the first cylinder 22. The groove portion 213 is circular, and the notch of the groove portion 213 faces the first barrel 24. On the premise of meeting the strength of the first end cover 2, the larger the cross-sectional area of the groove portion 213 in the radial direction of the first cylinder 22, the smaller the inner diameter of the first cylinder 22, and the material consumption of the first end cover 2 can be reduced. In this embodiment, through the first side portion 211, part of the first cylinder 22 is located within the valve body 1, such as Figure 2When the first piston 31 moves for commutation towards the second end cover 5 from the perspective shown, in the state where the commutation is in place, at least a part of the first piston 31 can be located in the valve body 1. Thus, compared with the length of the valve body in the background art, the length of the valve body component in this embodiment can be correspondingly reduced by the length when at least a part of the first piston 31 is located in the valve body 1. Therefore, on the premise that the first piston 31 has the same commutation stroke as the piston in the background art, the length of the valve body component can be reduced, and the switching time of the sliding commutation valve can also be shortened under the same pressure, so as to further improve the commutation efficiency of the sliding commutation valve.

[0029] Among them, the groove depth of the groove portion 213 is greater than or equal to 1 mm, so as to increase the length of the welding joint between the first side portion 211 and the valve body 1 and improve the connection strength between the first end cover 2 and the valve body 1.

[0030] To ensure the sealing performance of the first end cover 2, the first end cover 2 needs to be welded after being assembled to the valve body 1. The first end cover 2 is fixedly connected to the valve body 1 by laser welding. Specifically, the wall surface of the first side portion 211 facing the inner wall of the valve body 1 is welded to the inner wall of the valve body 1. At this time, the first side portion 211 has a relatively long straight line segment in the transverse direction of the valve body 1, so that the coaxiality between the first end cover 2 and the valve body 1 is better, further ensuring the reliability of commutation. And based on this, the first flanging portion 21 is welded to the inner wall of the valve body 1 through the first side portion 211 with a relatively long straight line segment, and the connection strength between the first end cover 2 and the valve body 1 can be better.

[0031] In this embodiment, the first flanging portion 21 includes an end face 214 away from the first barrel body 24 side. The end face 214 includes a transition surface 2141, which is an arc surface in this embodiment. Of course, it is not limited to this, and the transition surface 2141 can also be an inclined surface. The first cylinder body 22 is cylindrical. The end of the transition surface 2141 away from the first barrel body 24 side is closer to the center line L of the first cylinder body 22 than the end of the transition surface 2141 close to the first barrel body 24 side. The transition surface 2141 can make it smoother when the first end cover 2 inserts part of the first cylinder body 22 and the first flanging portion 21 into the valve cavity 110 together, playing a guiding role during assembly.

[0032] Among them, the first barrel body 24 is provided with a side hole 25. An extension section 251 connected and matched with the capillary 4 is connected to the inner wall of the side hole 25. The extension section 251 protrudes towards the inside of the first barrel body 24 along the axial direction of the side hole 25. The connection strength between the first barrel body 24 and the capillary 4 can be increased through the extension section 251.

[0033] In this embodiment, the sealing bowl 311 is farther from the first cylinder 22 than the base 312. The first connecting member 33 is used to connect the sealing bowl 311 and the base 312, and the second connecting member 34 is used to connect the first piston 31 and the piston rod 32. When the first piston 31 abuts against the first stepped portion 23, the first stepped portion 23 does not contact the first connecting member 33 and the second connecting member 34, so as to avoid interference between the first connecting member 33 and the second connecting member 34 and the first stepped portion 23 when the sliding reversing valve is reversed, and ensure the in-place degree of the reversal of the first piston 31.

[0034] It should be noted that although the smaller the inner contour size of the first cylinder 24, the faster the reversing speed of the first piston 31, excessively reducing the inner contour size of the first cylinder 24 will cause interference between the first piston 31 and the first cylinder 24, affecting the in-place condition during the reversal of the sliding reversing valve. Moreover, the smaller the inner contour size of the first cylinder 24, the greater the pressure that the first cylinder 24 needs to bear. Of course, the thicker the wall thickness of the first cylinder 24, the better the anti-pressure effect, but the corresponding material consumption will also increase accordingly. Therefore, when reducing the inner contour size of the non-cylindrical first cylinder 24, the contact area between the inner wall of the first cylinder 24 and the fluid medium can be increased to ensure that the first cylinder 24 can withstand a greater fluid pressure and avoid deformation of the first cylinder 24.

[0035] In this embodiment, the second end cover 5 includes a second cylinder 52, a second barrel 54, and a second stepped portion 53. In the projection direction of the axis of the second cylinder 52, the inner contour of the projection surface of the second barrel 54 is located within the inner contour of the projection surface of the second cylinder 52. The inner contour of the projection surface of the second barrel 54 is non-circular. The spool component 3 further includes a second piston 36. The second piston 36 is located in the second piston cavity 501 of the second end cover 5. The second cylinder 52 can allow the second piston 36 to slide, and the second piston 36 can abut against the second stepped portion 53. The second end cover 5 further includes a second flanging portion 51. The second cylinder 52 is farther from the valve body 1 than the second barrel 54, and the second flanging portion 51 is farther from the second barrel 54 than the second cylinder 52. The second flanging portion 51 is located inside the wall of the valve body 1, and the second flanging portion 51 is fixedly connected to the inner wall of the end of the valve body 1. The second flanging portion 51 includes a second side portion 511 and a second connecting portion 512. The second side portion 511 is connected to the second cylinder 52, and the second connecting portion 512 extends radially from the second cylinder 52 toward the inner wall of the valve body 1. The second side portion 511 is connected to the second connecting portion 512, and the second side portion 511 extends from the second connecting portion 512 toward the side close to the first cylinder 24, and the second side portion 511 is fixedly connected to the inner wall of the valve body 1. Among them, the second end cover 5 has the same structure as the first end cover 2, and the purposes to be achieved are also the same. Therefore, the second end cover 5 will not be elaborated here. The second piston 36 has the same structure as the first piston 31, and the purposes to be achieved are also the same. Therefore, the second piston 36 will not be elaborated here.

[0036] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity in description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0037] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof 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 present utility model, several modifications and controls can still be made, and these all fall within the protection scope of the present utility model.

Claims

1. A sliding reversing valve, characterized in that, It includes a valve body component, and the valve body component includes a valve body (1), a first end cover (2) and a spool component (3). The spool component (3) is partially located in the inner cavity (101) of the valve body (1). The first end cover (2) includes a first cylinder (22), a first barrel (24), and a first step portion (23). In the axial projection direction of the first cylinder (22), the inner contour of the projection surface of the first barrel (24) is located within the inner contour of the projection surface of the first cylinder (22). The inner contour of the projection surface of the first barrel (24) is non-circular. The spool component (3) includes a first piston (31), and the first piston (31) is located in the first piston cavity (201) of the first end cover (2). The first cylinder (22) allows the first piston (31) to slide, and the first piston (31) can abut against the first step portion (23). The first end cover (2) further includes a first flanging portion (21). The first barrel (24) is farther from the valve body (1) than the first cylinder (22). The first flanging portion (21) is farther from the first barrel (24) than the first cylinder (22). The first flanging portion (21) is located within the valve body (1). The first flanging portion (21) includes a first side portion (211) and a first connecting portion (212). The first side portion (211) is connected to the first cylinder (22). The first connecting portion (212) extends radially from the first cylinder (22) towards the inner wall of the valve body (1). The first side portion (211) is connected to the first connecting portion (212). The first side portion (211) extends towards the first barrel (24) side from the first connecting portion (212). The first side portion (211) is fixedly connected to the inner wall of the valve body (1).

2. The sliding reversing valve according to claim 1, characterized in that, A groove portion (213) is included between the first side portion (211) and the first cylinder (22). The notch of the groove portion (213) faces the first barrel (24), and the groove depth of the groove portion (213) is greater than or equal to 1 mm.

3. The sliding reversing valve according to claim 1, wherein, The end face (214) on the side of the first flanging portion (21) away from the first barrel (24) includes a transition surface (2141). The first cylinder (22) is cylindrical. The end of the transition surface (2141) on the side away from the first barrel (24) is closer to the center line (L) of the first cylinder (22) than the end of the transition surface (2141) on the side closer to the first barrel (24).

4. The sliding reversing valve according to claim 1, characterized in that, The valve body (1) and the first end cover (2) are made of stainless steel material, and the first end cover (2) is fixedly connected to the valve body (1) by laser welding.

5. The sliding type reversing valve according to claim 1, characterized in that, The spool component (3) further includes a piston rod (32) and a connecting member. The first piston (31) includes a sealing bowl (311) and a base (312). The connecting member includes a first connecting member (33) and a second connecting member (34). The first connecting member (33) is used to connect the sealing bowl (311) and the base (312). The second connecting member (34) is used to connect the first piston (31) and the piston rod (32). When the first piston (31) abuts against the first step portion (23), the first step portion (23) does not contact the first connecting member (33) and the second connecting member (34).

6. The sliding reversing valve according to claim 1, wherein, It further includes a capillary tube (4). The first barrel (24) is provided with a side hole (25). An extension section (251) that is connected and cooperates with the capillary tube (4) is connected to the inner wall of the side hole (25). The extension section (251) protrudes toward the inside of the first barrel (24) along the axial direction of the side hole (25).

7. The sliding reversing valve according to any one of claims 1-6, characterized in that, The valve body component further includes a second end cover (5). Horizontally of the valve body (1), the second end cover (5) is disposed opposite to the first end cover (2). The second end cover (5) includes a second cylinder (52), a second barrel (54), and a second step portion (53). In the projection direction of the axis of the second cylinder (52), the inner contour of the projection surface of the second barrel (54) is located inside the inner contour of the projection surface of the second cylinder (52). The inner contour of the projection surface of the second barrel (54) is non-circular. The spool component (3) further includes a second piston (36). The second piston (36) is located in the second piston chamber (501) of the second end cover (5). The second cylinder (52) can allow the second piston (36) to slide. The second piston (36) can abut against the second step portion (53). The second end cover (5) further includes a second flanging portion (51). The second cylinder (52) is farther from the valve body (1) than the second barrel (54). The second flanging portion (51) is farther from the second barrel (54) than the second cylinder (52). The second flanging portion (51) is located inside the valve body (1). The second flanging portion (51) is fixedly connected to the inner wall of the end of the valve body (1). The second flanging portion (51) includes a second side portion (511) and a second connecting portion (512). The second side portion (511) is connected to the second cylinder (52). The second connecting portion (512) extends radially from the second cylinder (52) toward the inner wall of the valve body (1). The second side portion (511) is connected to the second connecting portion (512). The second side portion (511) extends from the second connecting portion (512) toward the side close to the first barrel (24). The second side portion (511) is fixedly connected to the inner wall of the valve body (1).

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