Three-way reversing valve

Abstract

The utility model discloses a three-way reversing valve which comprises a valve body, a feeding straight-through part, a discharging straight-through part and a discharging bypass part are arranged on the valve body, a valve element capable of being driven to rotate is arranged in an inner cavity of the valve body, and the feeding straight-through part can be communicated with the discharging straight-through part or the discharging bypass part through rotation of the valve element. Sealing grooves are formed in the peripheries of ports, located on the inner wall of the shell of the valve body, of the feeding straight connector, the discharging straight connector and the discharging bypass, sealing rings are arranged in the sealing grooves, and V-shaped grooves are formed in the inner sides of the sealing rings along bodies of the sealing rings. The action stroke of the valve core in the valve body is relatively small, so that the abrasion of the sealing ring is slowed down, and the service life of the sealing ring is prolonged.

Description

Technical Field

[0001] The utility model relates to a reversing valve for switching the flow direction of materials, in particular to a three-way reversing valve. Background Art

[0002] Three-way reversing valves are generally used in pneumatic conveying systems, and their sealing performance and channel smoothness determine their quality. Patent application number CN203121637694.1 discloses a three-way reversing valve structure, including a valve body, a valve core that can be driven to rotate is provided in the inner cavity of the valve body, the valve core includes two groups of circular side plates and a guide plate, the guide plate is arranged between the two groups of circular side plates, the guide plate changes the material conveying direction of the internal channel of the valve body as the valve core rotates, and is connected with the internal channel of the valve body without a dead angle in conveying, the two groups of circular side plates are symmetrically provided with end shafts on the opposite sides, the outer rings of the two groups of circular side plates are inlaid with sealing rings, and the two side ridges of the guide plate are inlaid with sealing strips. The internal channel of the valve body is a three-way structure consisting of its feed straight through, its discharge straight through and the discharge bypass. A valve core that can be driven to rotate is provided in the inner cavity of the valve body. When the rotation angle of the valve core is 0°, the guide plate of the valve core closes the discharge bypass. When the valve core rotates 135° counterclockwise, the guide plate of the valve core closes the discharge straight through.

[0003] According to the description of the above technical solution, there are the following defects:

[0004] When the valve core changes the material conveying direction of the internal channel of the valve body through rotation switching, its rotation angle is 135°. The rotation angle is relatively large, so the valve core has a large movement stroke inside the valve body, which causes the sealing rings embedded on the outer rings of the two sets of circular side plates and the sealing strips embedded on the two side ridges of the guide plate to wear greatly, thereby shortening the service life of the sealing rings and sealing strips. Utility Model Content

[0005] The utility model aims to provide a three-way reversing valve, which can reduce the rotation angle of the valve core through the design of the valve core structure, thereby slowing down the wear of the sealing component and increasing the service life of the sealing component.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A three-way reversing valve comprises a valve body, wherein a feed through-hole, a discharge through-hole and a discharge bypass are arranged on the valve body, and a rotatable valve core is arranged in the inner cavity of the valve body, and the valve core can make the feed through-hole communicate with the discharge through-hole or the discharge bypass by rotating;

[0008] The ports of the feed straight-through, discharge straight-through and discharge bypass on the inner wall of the valve body are provided with sealing grooves at their peripheries, sealing rings are provided in the sealing grooves, and a V-shaped groove is provided on the inner side of the sealing ring along its body;

[0009] The valve core includes two groups of cylindrical barrels which are axially parallel and arranged side by side. The two groups of cylindrical barrels cause the feed through-hole to be connected with the discharge through-hole and the discharge bypass respectively as the valve core rotates. A group of small arc end plates are provided at the ends of the two groups of cylindrical barrels corresponding to the feed through-holes, and a group of large arc end plates are provided at the ends of the two groups of cylindrical barrels corresponding to the discharge through-holes and the discharge bypass. The two ports of the cylindrical barrels are respectively located on the arc-shaped outer surfaces of the small arc end plate and the large arc end plate. The small arc end plate and the large arc end plate are both concentric with the rotation axis of the valve core, and the arc-shaped outer surfaces of the small arc end plate and the large arc end plate always keep in contact with the sealing ring.

[0010] Furthermore, the angle between the discharge straight through and the discharge bypass is an acute angle, the discharge straight through and the feed straight through are axially coincident, the rotation angle of the valve core in the valve body is equal to the angle between the discharge straight through and the discharge bypass, and the valve core has two extreme positions in the valve body, namely the straight through position and the side through position. When the valve core is in the straight through position, the feed straight through is connected to the discharge straight through, and when the valve core is in the side through position, the feed straight through is connected to the discharge bypass.

[0011] Furthermore, connecting ribs a and b are provided between the upper and lower arc ends of the large arc-shaped end plate and the outer wall of the cylindrical tube to enhance the structural strength.

[0012] Furthermore, a conical limiting column which is located on the valve body and can be adjusted up and down is provided just above the middle of the feed straight through and the discharge straight through. When the valve core is in the straight through position in the valve body, the side surface of the conical limiting column fits with the connecting rib a.

[0013] Furthermore, valve covers are detachably connected on both sides of the valve body, the valve covers and the valve body are matched by stoppers and sealed by O-rings, and protrusions fixed on the outer wall of the cylindrical tube are symmetrically provided on both sides of the rotation axis of the valve core, and a support shaft supporting the rotation of the valve core is threadedly connected to the protrusions, and the support shaft is connected to the center hole of the valve cover through a flanged sliding bearing.

[0014] Furthermore, a shoulder is provided on the support shaft, the end face of the shoulder is relatively fitted with the side of the flanged sliding bearing, a stop plane is processed on the side of the shoulder, and a positioning piece is installed on the convex column to limit the position relative to the stop plane.

[0015] Furthermore, the present application also includes a power assembly for driving the valve core to rotate, wherein the power assembly adopts a straight-stroke cylinder connected to the valve body, the piston rod end of the straight-stroke cylinder extends into the valve body and is connected to a connector by a nut, a chain plate is bolted to the connector, and the chain plate is bolted to the connecting rib b; the power assembly may also adopt an angular stroke cylinder arranged on the valve cover, the driving end of the angular stroke cylinder is drivingly connected to the support shaft. If an angular stroke cylinder is adopted, the flange opening on the valve body connected to the straight-stroke cylinder is sealed by an end cover.

[0016] The beneficial effects of the utility model are:

[0017] The valve core adopts a structural design of two sets of axially parallel and side-by-side cylindrical tubes. When the rotation angle of the valve core is equal to the acute angle between the discharge straight-through and the discharge bypass, the purpose of switching the flow direction of the logistics can be achieved. Therefore, the action stroke of the valve core inside the valve body is relatively small, thereby reducing the wear of the sealing ring and increasing the service life of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Figure 1 It is a structural split diagram of the utility model.

[0020] Figure 2 It is a cross-sectional view of the state when the valve core in the valve body is in the straight-through position in the utility model.

[0021] Figure 3 It is a cross-sectional view of the state when the valve core in the valve body is in the side-through position in the utility model.

[0022] Figure 4 yes Figure 2 Enlarged view of point A in .

[0023] Figure 5 It is a state schematic diagram of the utility model using an angular stroke cylinder.

[0024] In the figure: 1. valve body, 101. feed straight-through, 102. discharge straight-through, 103. discharge bypass, 2. valve core, 201. cylindrical tube, 202. small arc end plate, 203. large arc end plate, 204a. connecting rib, 204b. connecting rib, 205. boss, 206. support shaft, 207. shaft shoulder, 208. positioning sheet, 3. sealing ring, 4. conical limit column, 5. valve cover, 6. flanged sliding bearing, 7. O-ring, 8. linear cylinder, 9. connector, 10. chain plate, 11. angular cylinder, 12. flow direction pointer, 13. junction box DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-5As shown, the utility model provides a three-way reversing valve, including a valve body 1, on which a feed straight-through 101, a discharge straight-through 102 and a discharge bypass 103 are arranged, the angle between the discharge straight-through 102 and the discharge bypass 103 is an acute angle, the discharge straight-through 102 and the feed straight-through 101 are axially overlapped, a valve core 2 that can be driven to rotate is arranged in the inner cavity of the valve body 1, and the valve core 2 can make the feed straight-through 101 communicate with the discharge straight-through 102 or the discharge bypass 103 by rotating;

[0027] The angle between the discharge straight-through 102 and the discharge bypass 103 is an acute angle, the discharge straight-through 102 and the feed straight-through 101 are axially overlapped, the rotation angle of the valve core 2 in the valve body 1 is equal to the angle between the discharge straight-through 102 and the discharge bypass 103, the valve core 2 has two extreme positions in the valve body 1, namely, the straight-through position and the side-through position, and the valve core 2 can switch back and forth between the straight-through position and the side-through position by rotating forward and reverse directions in the valve body 1. When the valve core 2 is in the straight-through position, the feed straight-through 101 is connected with the discharge straight-through 102, and when the valve core 2 is in the side-through position, the feed straight-through 101 is connected with the discharge bypass 103;

[0028] The ports of the feed straight-through 101, the discharge straight-through 102 and the discharge bypass 103 located on the inner wall of the valve body 1 are provided with sealing grooves at their peripheries, a sealing ring 3 is provided in the sealing grooves, and a V-shaped groove 301 is provided on the inner side of the sealing ring 3 along its body. In addition, in order to increase the body strength at the sealing grooves, a thickened flange R located on the outer wall of the valve body 1 is designed at the sealing grooves;

[0029] The specific structure of the valve core 2 includes two groups of cylindrical barrels 201 that are axially parallel and arranged side by side. The two groups of cylindrical barrels 201 rotate with the valve core 2 to cause the feed straight-through 101 to communicate with the discharge straight-through 102 and the discharge bypass 103 respectively. When the valve core 2 is in the straight-through position in the valve body 1, the two ports of one group of cylindrical barrels 201 on the valve core 2 body are respectively connected to the inner ports of the feed straight-through 101 and the discharge straight-through 102, so that the feed straight-through 101 is respectively connected to the discharge straight-through 102; when the valve core 2 is in the side-through position in the valve body 1, the two ports of the other group of cylindrical barrels 201 on the valve core 2 body are respectively connected to the inner ports of the feed straight-through 101 and the discharge bypass 103, so that the feed straight-through 101 is respectively connected to the discharge bypass 103;

[0030] A group of small arc end plates 202 are provided at the ends of the two groups of cylindrical barrels 201 corresponding to the feed straight through 101, and a group of large arc end plates 203 are provided at the ends of the two groups of cylindrical barrels 201 corresponding to the discharge straight through 102 and the discharge bypass 103. The two ports of the cylindrical barrel 201 are respectively located on the arc-shaped outer surfaces of the small arc end plate 202 and the large arc end plate 203. The small arc end plate 202 and the large arc end plate 203 are both concentric with the rotation axis of the valve core 2, and the arc-shaped outer surfaces of the small arc end plate 202 and the large arc end plate 203 always keep in contact with the sealing ring 3. Connecting ribs 204a and connecting ribs 204b for strengthening the structural strength are respectively provided between the upper and lower arc ends of the large arc end plate 203 and the outer wall of the cylindrical barrel 201. The valve cover 5 is detachably connected to both sides of the valve body 1, and the valve cover 5 and the valve body 1 are matched through a stop and sealed with an O-ring 7. The valve body 1 and the valve cover 5 are connected by bolt locking, and the corresponding bolt holes on the valve body 1 and the valve cover 5 are provided with lug designs to strengthen the thickness of the connection structure. The outer side surface of the valve cover 5 is designed to be a conical surface structure, which is at a certain angle to the horizontal plane and is more suitable for resisting the air flow pressure of the material conveying inside the valve body 1. Bosses 205 fixed on the outer wall of the cylindrical tube 201 are symmetrically provided on both sides of the rotation axis of the valve core 2, and a support shaft 206 supporting the rotation of the valve core 2 is threadedly connected to the boss 205. The support shaft 206 is connected to the center hole of the valve cover 5 through the flanged sliding bearing 6. A shoulder 207 is provided on the support shaft 206, and the end face of the shoulder 207 is relatively fitted with the side of the flanged sliding bearing 6, thereby limiting the movement of the valve core 2 along its rotation axis. A stop plane is processed on the side of the shoulder 207, and a positioning piece 208 is installed on the boss 205 to limit the position relative to the stop plane to prevent the support shaft 206 from rotating.

[0031] The valve core 2 adopts a structural design of two groups of axially parallel and side-by-side arranged cylindrical tubes 201. When the rotation angle of the valve core 2 is equal to the acute angle between the discharge straight channel 102 and the discharge bypass 103, the purpose of switching the flow direction of the logistics can be achieved. Therefore, the action stroke of the valve core 2 inside the valve body 1 is relatively small, thereby reducing the wear of the sealing ring 3 and increasing the service life of the sealing ring 3.

[0032] In this embodiment, a tapered stop column 4 which is located on the valve body 1 and can be adjusted up and down is provided just above the middle of the feed straight-through 101 and the discharge straight-through 102. The tapered stop column 4 can be adjusted up and down by a vertical bolt 303 which is threadedly connected to the valve body 1, and a locking nut 304 is provided on the vertical bolt 303. When the valve core 2 is in the straight-through position in the valve body 1, the side of the tapered stop column 4 fits with the connecting rib 204a. When the valve core 2 is in the straight-through position in the valve body 1, if there is a slight position deviation when the two ports of the corresponding cylindrical barrel 201 are connected with the inner ports of the feed straight-through 101 and the inner ports of the discharge straight-through 102, it will cause the material to be scratched at the connection port during the material transmission process. The tapered stop column 4 can be adjusted up and down to adjust the rotation angle of the valve core 2, so that the matching degree of the two ports of the cylindrical barrel 201 when connected with the feed straight-through 101 and the discharge straight-through 102 is higher, so that the material can pass smoothly from the connection port.

[0033] A flow direction pointer 12 is fixed on the shaft end face of one side of the support shaft 206 by bolts and gaskets, which is used to distinguish whether the valve core 3 is in the straight-through position or the side-through position in the valve body 1. A junction box 13 is provided on the corresponding valve cover 5 at the shaft end on the other side of the support shaft 206. The junction box 13 is built with a position feedback switch device. The feedback connection shaft inside the position feedback switch device is connected to the end of the support shaft 206, so as to achieve the purpose of detecting the rotation of the valve core 2. The rotation of the valve core 2 can be detected and the electrical signal can be fed back to the upper computer. The position feedback switch device is a mature technical product, which is purchased from the market and can be directly installed on the product corresponding to this application and connected to the end of the support shaft 206 of this product.

[0034] The three-way reversing valve conveys the material by pneumatic force. The airflow of the material conveying is relatively large. The airflow pushes the material from the feed straight channel 101 into the corresponding cylindrical barrel 201, and then discharges from the discharge straight channel 102 or the discharge bypass 103. Figure 4 In the k direction shown, the seal ring 3 enters the V-shaped groove 301 from the gap between the seal ring 3 and the seal groove. At this time, the V-shaped groove 301 is deformed and expanded by the air pressure, and the expansion force acts on the seal ring 3 body, which can make the seal ring 3 and the arc-shaped outer side surface of the arc-shaped end plate 203 of the valve core 2 fit more closely and have a better sealing effect.

[0035] In this embodiment, the present application also includes a power assembly for driving the valve core 2 to rotate, referring to Figure 2 , Figure 3, the power assembly can be a straight-stroke cylinder 8 connected to the valve body 1, the piston rod end of the straight-stroke cylinder 8 extends into the interior of the valve body 1 and is connected to a connector 9 by a nut, a chain plate 10 is bolted to the connector 9, and the chain plate 10 is bolted to the connecting rib 204b; when the valve core 2 is in the side-pass position in the valve body 1, if there is a slight position deviation when the two ports of the corresponding cylindrical barrel 201 are connected with the inner port of the feed straight-through 101 and the inner port of the discharge bypass 103, the position of the piston rod end of the straight-stroke cylinder 8 can be adjusted by rotating the connector 9. Through the structural linkage relationship, the rotation angle of the valve core 2 is adjusted, so that the two ports of the cylindrical barrel 201 are more matched when connected with the feed straight-through 101 and the discharge bypass 103. The straight-stroke cylinder 8 is controlled by the air control assembly composed of the external solenoid valve F1 and the filter pressure regulating solenoid valve F2 of this application, so that the extension and contraction amount of its piston rod is controlled. The pneumatic control means of the pneumatic control component for the linear cylinder 8 belongs to the prior art and is not what the present application is intended to protect, so no further detailed description will be given for this.

[0036] In this embodiment, the power assembly can also be an angular stroke cylinder 11 disposed on the valve cover 5. Figure 5 As shown, if the angular stroke cylinder 11 is used, the flow direction pointer 12 at the end of the support shaft 206 needs to be removed, and the end of the support shaft 206 is connected by the driving end of the angular stroke cylinder 11. The driving shaft of the angular stroke cylinder 11 has an angle rotation direction arrow mark S, which can also be used to distinguish whether the valve core 3 is in the straight-through position or the side-through position in the valve body 1. When the angular stroke cylinder 11 is used, the flange port on the valve body 1 connected to the linear stroke cylinder 8 is sealed with an end cover.

[0037] The above-described implementation modes of the present invention do not constitute a limitation on the protection scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A three-way reversing valve, comprising a valve body (1), wherein the valve body (1) is provided with a feed through-hole (101), a discharge through-hole (102) and a discharge bypass (103), wherein a rotatable valve core (2) is provided in an inner cavity of the valve body (1), wherein the valve core (2) can rotate to connect the feed through-hole (101) with the discharge through-hole (102) or with the discharge bypass (103), wherein the valve body (1) is characterized in that: The ports of the feed straight-through (101), the discharge straight-through (102) and the discharge bypass (103) located on the inner wall of the valve body (1) are provided with sealing grooves on their peripheries, a sealing ring (3) is provided in the sealing groove, and a V-shaped groove (301) is provided on the inner side of the sealing ring (3) along its body; The valve core (2) comprises two groups of cylindrical barrels (201) which are axially parallel and arranged side by side. The two groups of cylindrical barrels (201) rotate with the valve core (2) to cause the feed straight channel (101) to communicate with the discharge straight channel (102) and the discharge bypass (103) respectively. A group of small arc-shaped end plates (202) are provided at the ends of the two groups of cylindrical barrels (201) corresponding to the feed straight channel (101). The two groups of cylindrical barrels (201) correspond to the discharge straight channel (102) and the discharge bypass (103). A group of large arc-shaped end plates (203) are provided at the end of the material bypass (103), and the two ports of the cylindrical tube (201) are respectively located on the arc-shaped outer surfaces of the small arc-shaped end plate (202) and the large arc-shaped end plate (203). The small arc-shaped end plate (202) and the large arc-shaped end plate (203) are both concentric with the rotation axis of the valve core (2), and the arc-shaped outer surfaces of the small arc-shaped end plate (202) and the large arc-shaped end plate (203) always keep in contact with the sealing ring (3).

2. The three-way reversing valve according to claim 1, characterized in that The angle between the discharge straight-through (102) and the discharge bypass (103) is an acute angle, the discharge straight-through (102) and the feed straight-through (101) are axially overlapped, the rotation angle of the valve core (2) in the valve body (1) is equal to the angle between the discharge straight-through (102) and the discharge bypass (103), and the valve core (2) has two extreme positions in the valve body (1), namely, a straight-through position and a side-through position. When the valve core (2) is in the straight-through position, the feed straight-through (101) is connected to the discharge straight-through (102), and when the valve core (2) is in the side-through position, the feed straight-through (101) is connected to the discharge bypass (103).

3. The three-way reversing valve according to claim 2, characterized in that Connecting ribs (204a, 204b) for enhancing structural strength are respectively provided between the upper and lower arc ends of the large arc-shaped end plate (203) and the outer wall of the cylindrical tube (201).

4. The three-way reversing valve according to claim 3, characterized in that A conical limiting column (4) which is located on the valve body (1) and can be adjusted up and down is provided just above the middle of the feed straight-through (101) and the discharge straight-through (102); when the valve core (2) is in the straight-through position in the valve body (1), the side surface of the conical limiting column (4) fits against the connecting rib (204a).

5. The three-way reversing valve according to claim 3, characterized in that The valve body (1) is detachably connected to valve covers (5) on both sides. The valve covers (5) and the valve body (1) are matched via stoppers and sealed with O-rings (7). Convex columns (205) fixed to the outer wall of the cylindrical tube (201) of the valve core (2) are symmetrically arranged on both sides of the rotation axis of the valve core (2). A support shaft (206) for supporting the rotation of the valve core (2) is threadedly connected to the convex column (205). The support shaft (206) is connected to the center hole of the valve cover (5) via a flanged sliding bearing (6).

6. The three-way reversing valve according to claim 5, characterized in that The support shaft (206) is provided with a shaft shoulder (207), the end face of the shaft shoulder (207) is relatively fitted with the side face of the flanged sliding bearing (6), and a stop plane is processed on the side face of the shaft shoulder (207), and a positioning piece (208) is installed on the protruding column (205) to limit the position relative to the stop plane.

7. The three-way reversing valve according to claim 5, characterized in that : comprising a power assembly for driving the valve core (2) to rotate.

8. The three-way reversing valve according to claim 7, characterized in that The power assembly adopts a linear cylinder (8) connected to the valve body (1), the piston rod end of the linear cylinder (8) extends into the interior of the valve body (1) and is nut-connected to a connector (9), a chain plate (10) is bolted to the connector (9), and the chain plate (10) is bolted to the connecting rib (204b).

9. The three-way reversing valve according to claim 7, characterized in that The power assembly adopts an angular stroke cylinder (11) arranged on the valve cover (5), and the driving end of the angular stroke cylinder (11) is drivingly connected to the support shaft (206).

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