Low-flow-resistance and low-abrasion gate valve body assembly

Abstract

A groove corresponding to a gate plate is formed in a valve cavity of the low-flow-resistance low-abrasion gate valve body assembly, when the gate plate rises to the limit, the bottom of the gate plate is located above a medium input channel and a medium output channel, and sealing assemblies are arranged at the front end and the rear end of the gate plate respectively. The sealing assembly comprises a sealing ring, an inner fixing ring, an outer fixing ring, a backing ring and a supporting ring, the front end and the rear end of the gate plate are each provided with an annular installation groove, the supporting ring is fixed to the bottom of the installation groove, a plurality of protruding elastic pieces are arranged on the supporting ring in an array mode, and the elastic pieces protrude towards the outer side of the installation groove. The backing ring is arranged in the mounting groove and abuts against the elastic pieces, the sealing ring is a convex sealing ring, the sealing ring is fixed to the mounting groove through an inner fixing ring and an outer fixing ring, the inner end of the sealing ring abuts against the backing ring, and the outer end of the sealing ring protrudes out of the mounting groove. The gate valve is low in flow resistance and reliable in sealing, and the abrasion rate of the gate plate is low.

Description

Technical Field

[0001] The utility model relates to a gate valve body assembly with low flow resistance and low wear Background Art

[0002] The gate valve body assembly in the prior art generally includes a valve body and a gate plate. A valve cavity is provided in the valve body, and sealing assemblies corresponding to the gate plate are arranged on both sides of the valve cavity. After the gate plate of this structure rises, the sealing assemblies located in the valve cavity and the internal structure of the valve cavity for installing the sealing assemblies will increase the flow resistance when the medium passes through. At the same time, due to the impact of the medium, the gate plate will generate a certain deviation under the action of the sealing assembly and cause friction with the inner wall of the valve cavity, and the wear of the gate plate is relatively serious Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies of the prior art and provide a gate valve body assembly with low flow resistance and low wear

[0004] The technical solution of the utility model is: a gate valve body assembly with low flow resistance and low wear, including a valve body and a gate plate. The middle of the valve body has a valve cavity, and the gate plate is connected to the valve cavity in a lifting manner. Grooves corresponding to the gate plate are respectively provided at the bottom and the left and right sides of the valve cavity. Media input channels and media output channels are coaxially arranged in the valve body at the front and rear ends of the valve cavity. When the gate plate rises to the limit, the bottom of the gate plate is located above the media input channel and the media output channel

[0005] Sealing assemblies are respectively provided at the front and rear ends of the gate plate

[0006] Both of the sealing assemblies include a sealing ring, an inner fixing ring, an outer fixing ring, a spacer ring and a support ring

[0007] Annular installation grooves are respectively provided at the front and rear ends of the gate plate. When the gate plate descends to the limit, the two installation grooves are respectively coaxially arranged with the media input channel and the media output channel

[0008] The support ring is fixed at the bottom of the installation groove. A plurality of convex elastic pieces are arrayed on the support ring, and each elastic piece protrudes towards the outside of the installation groove. The spacer ring is arranged in the installation groove and abuts against each elastic piece. The sealing ring is a "convex"-shaped sealing ring, and the sealing ring is fixed on the installation groove through the inner fixing ring and the outer fixing ring. The inner end of the sealing ring abuts against the spacer ring, and the outer end of the sealing ring protrudes above the installation groove

[0009] Further, a plurality of fixing holes are provided on the support ring, and the support ring is fixed in the installation groove through a plurality of screws

[0010] Further, a plurality of windows are arrayed on the support ring, one end of each elastic sheet is integrally connected to the end of the window, the middle of each elastic sheet protrudes in an isosceles trapezoid shape, and the other end of each elastic sheet is slidably connected within the window.

[0011] Further, the sealing ring protrudes from the end of the installation groove, and chamfers are provided on both its inner circumference and outer circumference.

[0012] Further, the outer end faces of the inner fixing ring and the outer fixing ring are flush with the end face of the gate plate.

[0013] Further, the gate plate is composed of a frame and two side plates respectively fixed on both sides of the frame.

[0014] Further, support columns are also provided on the inner side of the frame.

[0015] Further, the two sealing assemblies are respectively arranged on the two side plates, and the side plates and the frame are detachable structures.

[0016] Further, a seal is also provided at the connection between the side plate and the frame.

[0017] The beneficial effects of the present utility model are as follows: The sealing assembly of the present utility model has reliable sealing. When the gate plate is lifted or lowered, almost no friction is generated with the inner wall of the valve cavity, and the wear of the gate plate is greatly reduced. After the gate plate is lifted, there are no components in the valve cavity that will increase the flow resistance, with low flow resistance and smooth passage of the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of the present utility model;

[0019] Figure 2 is Figure 1 an enlarged view of part A in

[0020] Figure 3 is a schematic structural view of the gate plate in the present utility model;

[0021] Figure 4 is a schematic structural view of the support ring in the present utility model.

[0022] In the figure: valve body 1, gate plate 2, frame 3, side plate 4, medium input channel 5, medium output channel 6, sealing assembly 7, sealing ring 8, inner fixing ring 9, outer fixing ring 10, gasket ring 11, support ring 12, installation groove 13, elastic sheet 14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions of the present utility model will be further specifically described below through embodiments in combination with the drawings.

[0024] Combined with Figures 1-4As shown in the figure, a low-flow-resistance and low-wear gate valve body assembly includes a valve body 1 and a gate plate 2. The middle part of the valve body 1 has a valve cavity, and the gate plate 2 is connected to the valve cavity in a lifting manner;

[0025] The bottom and the left and right sides of the valve cavity respectively have grooves corresponding to the gate plate 2. In the valve body 1 at the front and rear ends of the valve cavity, there are coaxially arranged a medium input channel 5 and a medium output channel 6. When the gate plate 2 rises to the limit, the bottom of the gate plate 2 is located above the medium input channel 5 and the medium output channel 6. That is, after the gate valve is opened, the medium input channel 5 and the medium output channel 6 are completely connected without any obstruction in the middle, having the advantages of low flow resistance and large flow rate:

[0026] The front and rear ends of the gate plate 2 respectively have sealing assemblies 7;

[0027] Both of the two sealing assemblies 7 include a sealing ring 8, an inner fixing ring 9, an outer fixing ring 10, a cushion ring 11 and a support ring 12;

[0028] The front and rear ends of the gate plate 2 are respectively provided with an annular installation groove 13. When the gate plate 2 descends to the limit, the two installation grooves 13 are respectively coaxially arranged with the medium input channel 5 and the medium output channel 6;

[0029] The support ring 12 is fixed at the bottom of the installation groove 13. A plurality of convex elastic pieces 14 are arrayed on the support ring 12. Each of the elastic pieces 14 protrudes towards the outside of the installation groove 13. The cushion ring 11 is arranged in the installation groove 13 and abuts against each elastic piece 14. The sealing ring 8 is a "convex"-shaped sealing ring. The sealing ring 8 is fixed on the installation groove 13 through the inner fixing ring 9 and the outer fixing ring 10. The inner end of the sealing ring 8 abuts against the cushion ring 11, and the outer end of the sealing ring 8 protrudes above the installation groove 13.

[0030] The working principle and beneficial effects of the above structure are as follows: When the gate plate 2 descends and the valve is closed, both of the two sealing assemblies 7 abut against the grooves in the valve cavity to seal the joints of the medium input channel 5 and the medium output channel 6 with the valve cavity; at this time, the sealing ring 8 is compressed and shrunk, and the support ring 12 keeps supporting the sealing ring 8 through the cushion ring 11, making the sealing of the sealing ring 8 reliable; since the gate plate 2 is sealed with the inside of the valve cavity through the sealing assemblies 7 installed on the gate plate 2, there is a gap between the gate plate 2 itself and the valve cavity. Therefore, when the gate plate 2 is lifted or lowered, almost no friction is generated, and the wear of the gate plate 2 is greatly reduced; and the sealing assemblies 7 rise and fall with the lifting and lowering of the gate plate 2. The outer end of the sealing ring 8 can perform a certain range of inward and outward expansion and contraction with the change of pressure, which can effectively avoid the direct friction between the gate plate 2 and the inner wall of the valve cavity while ensuring the sealing performance; in addition, because the sealing assemblies 7 rise and fall with the lifting and lowering of the gate plate 2, after the gate plate 2 rises, there is no component in the valve cavity that will increase the flow resistance, so it can ensure the smooth passage of the medium.

[0031] In another embodiment, as Figure 4 shown, a plurality of fixing holes are provided on the support ring 12, and the support ring 12 is fixed in the installation groove 13 by a plurality of screws.

[0032] In another embodiment, as Figure 4 shown, a plurality of windows are arrayed on the support ring 12. One end of each elastic sheet 14 is integrally connected to the end of the window. The middle part of each elastic sheet 14 protrudes in an isosceles trapezoid shape. The other end of each elastic sheet 14 is slidably connected in the window. The support ring 12 with the above structure has the advantages of simple structure and low manufacturing cost. Moreover, when each elastic sheet 14 is compressed and stretched, it is guided and limited by the window and is not easily distorted.

[0033] In another embodiment, as Figure 2 shown, the sealing ring 8 protrudes from the end of the installation groove 13, and chamfers are provided on both its inner circumference and outer circumference.

[0034] In another embodiment, as Figure 2 shown, the outer end faces of the inner fixing ring 9 and the outer fixing ring 10 are flush with the end face of the gate plate 2.

[0035] In another embodiment, in combination with Figure 1 and Figure 3 shown, the gate plate 2 is composed of a frame 3 and two side plates 4 respectively fixed on both sides of the frame 3 to reduce the self-weight of the gate plate 2.

[0036] In another embodiment, support columns are further provided on the inner side of the frame 3 to improve the reliability of the side plates 4 and prevent the two side plates 4 from being deformed under pressure.

[0037] In another embodiment, as Figure 3 shown, the two sealing assemblies 7 are respectively arranged on the two side plates 4. The side plates 4 and the frame 3 are of a detachable structure to facilitate the disassembly, assembly and maintenance of the sealing assemblies 7.

[0038] In another embodiment, a seal is further provided at the connection between the side plates 4 and the frame 3 to prevent the medium from penetrating into the interior of the gate plate 2.

Claims

1. A low-flow-resistance and low-wear gate valve body assembly, comprising a valve body (1) and a gate plate (2). The middle part of the valve body (1) has a valve cavity, and the gate plate (2) is connected to be lifted and lowered in the valve cavity. It is characterized in that, The bottom and the left and right sides of the valve cavity respectively have grooves corresponding to the gate plate (2). Inside the valve body (1) at the front and rear ends of the valve cavity, there are coaxially arranged a medium input channel (5) and a medium output channel (6). When the gate plate (2) rises to the limit, the bottom of the gate plate (2) is located above the medium input channel (5) and the medium output channel (6): At the front and rear ends of the gate plate (2), there are respectively sealing assemblies (7); Both of the two sealing assemblies (7) include a sealing ring (8), an inner fixing ring (9), an outer fixing ring (10), a cushion ring (11) and a support ring (12); At the front and rear ends of the gate plate (2), there are respectively provided an annular installation groove (13). When the gate plate (2) descends to the limit, the two installation grooves (13) are respectively coaxially arranged with the medium input channel (5) and the medium output channel (6); The support ring (12) is fixed at the bottom of the installation groove (13). A plurality of convex elastic pieces (14) are arrayed on the support ring (12). Each of the elastic pieces (14) protrudes towards the outside of the installation groove (13). The cushion ring (11) is arranged in the installation groove (13) and abuts against each of the elastic pieces (14). The sealing ring (8) is a "convex"-shaped sealing ring. The sealing ring (8) is fixed on the installation groove (13) through the inner fixing ring (9) and the outer fixing ring (10). The inner end of the sealing ring (8) abuts against the cushion ring (11). The outer end of the sealing ring (8) protrudes above the installation groove (13).

2. The low-flow-resistance and low-wear gate valve body assembly according to claim 1, wherein A plurality of fixing holes are provided on the support ring (12). The support ring (12) is fixed in the installation groove (13) through a plurality of screws.

3. The low-flow-resistance and low-wear gate valve body assembly according to claim 2, characterized in that, A plurality of windows are arrayed on the support ring (12). One end of each of the elastic pieces (14) is integrally connected to the end of the window. The middle part of each of the elastic pieces (14) protrudes in an isosceles trapezoid shape. The other end of each of the elastic pieces (14) is slidably connected in the window.

4. The low-flow-resistance and low-wear gate valve body assembly according to claim 3, characterized in that, The end of the sealing ring (8) protruding above the installation groove (13) is provided with chamfers on both its inner circumference and outer circumference.

5. The low-flow-resistance and low-wear gate valve body assembly according to claim 4, characterized in that, The outer end faces of the inner fixing ring (9) and the outer fixing ring (10) are flush with the end face of the gate plate (2).

6. The low-flow-resistance and low-wear gate valve body assembly according to claim 5, wherein The gate plate (2) is composed of a frame (3) and two side plates (4) respectively fixed on both sides of the frame (3).

7. The low-flow-resistance and low-wear gate valve body assembly according to claim 6, characterized in that, Support columns are further provided on the inner side of the frame (3).

8. The low-flow-resistance and low-wear gate valve body assembly according to claim 7, characterized in that, The two sealing assemblies (7) are respectively arranged on the two side plates (4). The side plates (4) and the frame (3) are of a detachable structure.

9. The low-flow-resistance and low-wear gate valve body assembly according to claim 8, wherein, Sealing is also provided at the connection between the side plates (4) and the frame (3).

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