Manual-automatic integrated self-compensation three-eccentric center butterfly valve

Abstract

The utility model discloses a manual-automatic integrated self-compensating three-eccentric center butterfly valve which is characterized in that a valve body is provided with a fixing seat corresponding to a valve seat, the valve seat is buckled on the fixing seat, a hanging ring is further fixed on a valve cavity on the outer side of the fixing seat, one end of the hanging ring is provided with an abutting ring, the abutting ring is inserted into a groove of the valve seat, and an elastic ring is further arranged between the abutting ring and the groove. An arc-shaped groove is formed in the front face of the valve seat, a conical hole is formed in the middle of the valve seat, the edges of the two sides of the arc-shaped groove are in arc-shaped transition connection with the edge of the valve seat and the edge of the conical hole, the joint of the arc-shaped groove and the edge of the valve seat protrudes out of the joint of the arc-shaped groove and the conical hole, and the sealing face of the butterfly plate corresponds to the front face of the valve seat and the conical hole in shape. The utility model has the advantages of difficult internal leakage, reliable sealing and convenient maintenance.

Description

Technical Field

[0001] The utility model relates to a manual and automatic integrated self-compensating triple eccentric butterfly valve. Background Art

[0002] The seal surface structure of the butterfly valve in the prior art is a multi-layer inclined surface fit. At high temperatures, the deformation coefficients of the valve plate seal surface and the valve seat seal surface are different, and uneven deformation leads to internal leakage. In application scenarios such as the outlet of the heat network heater, the inlet of the open and closed water, and the heat supply primary station, due to more impurities, the seal surfaces of the above structures are also easily worn by impurities, resulting in internal leakage. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art, and provide a manual and automatic integrated self-compensating triple eccentric butterfly valve that is not prone to internal leakage and has reliable sealing.

[0004] The technical solution of the utility model is: a manual and automatic integrated self-compensating triple eccentric butterfly valve, including a valve body, a valve stem, a valve seat and a butterfly plate. The valve body has a fixed seat corresponding to the valve seat. The fixed seat is a ring body protruding from one end of the valve cavity. The outer periphery of the valve seat has a convex ring corresponding to the fixed seat. The valve seat is buckled on the fixed seat. There is also a stepped fixing groove on the valve cavity outside the fixed seat. The back of the valve seat also has a groove. A lifting ring is fixed on the fixing groove. One end of the lifting ring facing the valve seat has an abutting ring corresponding to the groove. The abutting ring is inserted into the groove of the valve seat. An elastic ring is also provided between the abutting ring and the groove.

[0005] The front of the valve seat has an arc-shaped groove. The middle of the valve seat has a conical hole. The two side edges of the arc-shaped groove are arc-transitionally connected with the edge of the valve seat and the edge of the conical hole. The connection between the arc-shaped groove and the edge of the valve seat protrudes from the connection between the arc-shaped groove and the conical hole. The seal surface of the butterfly plate corresponds to the shape of the front of the valve seat and the conical hole.

[0006] Furthermore, a gasket is also provided between the valve seat and the fixed seat.

[0007] Specifically, the elastic ring is a rubber ring.

[0008] Specifically, the seal surfaces of the valve seat and the butterfly plate are both of the structure of integral forging and surfacing with hard alloy.

[0009] Specifically, the valve stem is a double-axis valve stem. The back of the butterfly plate has fixed ends corresponding to the two valve stems.

[0010] Specifically, the two valve stems and the butterfly plate are connected by splines.

[0011] Furthermore, it also includes a transmission actuator arranged at the top of the valve body. The valve stem and the transmission actuator are connected by splines.

[0012] Specifically, the transmission actuator is a manual transmission actuator, an electric transmission actuator or a manual and electric integrated transmission actuator.

[0013] Furthermore, the front surface of the butterfly plate also has reinforcing ribs in a grid structure.

[0014] Furthermore, the bottom of the valve body has a mounting hole corresponding to the valve stem. A shaft sleeve is provided in the mounting hole. A gasket, a spacer and a fixed flange are sequentially arranged at the bottom of the mounting hole. The fixed flange is fixed to the bottom of the valve body by fixing bolts. An anti-ejection ring is also provided at the connection between the valve stem and the shaft sleeve.

[0015] The beneficial effects of the present utility model are as follows: The valve seat of the present utility model has a self-compensation ability, which can ensure the sealing performance between the valve seat and the sealing surface of the butterfly plate when the butterfly valve is closed. Moreover, the fixing structure of the valve seat 3 is also convenient for maintenance and replacement;

[0016] The sealing surfaces of the valve seat and the butterfly plate of the present utility model are multi-channel arc-shaped bent seals, which can ensure the sealing effect. Moreover, the sealing line of the sealing surface of this structure is wider, and it can prevent impurities from scratching the sealing surface under the working conditions with more impurities. Description of the Drawings

[0017] Figure 1 is a cross-sectional view of the present utility model;

[0018] Figure 2 is a structural schematic diagram of the present utility model;

[0019] Figure 3 is a structural schematic diagram of the valve seat of the present utility model.

[0020] In the figure: valve body 1, valve stem 2, valve seat 3, butterfly plate 4, fixed seat 5, convex ring 6, groove 7, lifting ring 8, abutting ring 9, elastic ring 10, arc-shaped groove 11, fixed end 12, reinforcing rib 13, shaft sleeve 14, fixed flange 15, anti-ejection ring 16. Detailed Embodiments

[0021] Next, through embodiments and in combination with the drawings, the technical solutions of the present utility model will be further specifically described.

[0022] Combined with Figures 1-3 as shown, a manual and electric integrated self-compensation triple-eccentric butterfly valve includes a valve body 1, a valve stem 2, a valve seat 3 and a butterfly plate 4;

[0023] The valve body 1 is provided with a fixing seat 5 corresponding to the valve seat 3. The fixing seat 5 is a ring body protruding from one end of the valve cavity. The outer periphery of the valve seat 3 has a convex ring 6 corresponding to the fixing seat 5. The valve seat 3 is buckled on the fixing seat 5. There is also a ring of stepped fixing grooves on the valve cavity outside the fixing seat 5. The back of the valve seat 3 also has a ring of grooves 7. A lifting ring 8 is fixed on the fixing groove. One end of the lifting ring 8 facing the valve seat 3 has an abutting ring 9 corresponding to the groove 7. The abutting ring 9 is inserted into the groove 7 of the valve seat 3. An elastic ring 10 is also provided between the abutting ring 9 and the groove 7, so that the valve seat 3 has self-compensation ability to ensure the sealing performance of the sealing surfaces of the valve seat 3 and the butterfly plate 4 when the butterfly valve is closed. Moreover, the fixing structure of the valve seat 3 is also convenient for maintenance and replacement;

[0024] The front of the valve seat 3 has an arc-shaped groove 11. The middle of the valve seat 3 has a conical hole. The two side edges of the arc-shaped groove 11 are arc-transitionally connected to the edge of the valve seat 3 and the edge of the conical hole. The connection between the arc-shaped groove 11 and the edge of the valve seat 3 protrudes from the connection between the arc-shaped groove 11 and the conical hole. The sealing surface of the butterfly plate 4 corresponds to the shape of the front of the valve seat 3 and the conical hole; The sealing surfaces of the valve seat 3 and the butterfly plate 4 with this structure are multi-channel arc-bending seals, which can ensure the sealing effect. Moreover, the sealing line of the sealing surface with this structure is wider, and it can prevent impurities from scratching the sealing surface under the working conditions with more impurities.

[0025] Specifically, a sealing gasket is also provided between the valve seat 3 and the fixing seat 5;

[0026] Specifically, the elastic ring 10 is a rubber ring;

[0027] Specifically, the sealing surfaces of the valve seat 3 and the butterfly plate 4 are both of the integral forging and surfacing hard alloy structure, which can effectively solve the problem of deformation of the high-temperature sealing surface.

[0028] In another embodiment, as Figure 1 shown, the valve stem 2 is a double-axis valve stem. The back of the butterfly plate 4 has fixing ends 12 corresponding to the two valve stems 2, which can effectively improve the flow capacity and flow resistance coefficient of the valve and reduce energy consumption.

[0029] In another embodiment, the two valve stems 2 and the butterfly plate 4 are connected by splines, replacing the original pin and mortise structure, effectively avoiding the risk of pin breakage of the butterfly plate 4 and the valve stem 2.

[0030] In another embodiment, it further includes a transmission actuator arranged at the top of the valve body 1. The valve stem 2 and the transmission actuator are connected by splines, replacing the original keyway design, and can be installed in any direction when the installation space is limited;

[0031] Specifically, the transmission actuator is a manual transmission actuator, an electric transmission actuator or a manual-automatic integrated transmission actuator;

[0032] In another embodiment, as Figure 2 shown, the front surface of the butterfly plate 4 further has reinforcing ribs 13 in a grid structure to improve the strength of the butterfly plate 4.

[0033] In another embodiment, as Figure 1 shown, the bottom of the valve body 1 has a mounting hole corresponding to the valve stem 2. A bushing 14 is provided in the mounting hole. A gasket, a spacer block and a fixed flange 15 are sequentially arranged at the bottom of the mounting hole. The fixed flange 15 is fixed to the bottom of the valve body 1 by fixing bolts. An anti-ejection ring 16 is further provided at the connection between the valve stem 2 and the bushing 14. This structure facilitates the disassembly and assembly of the valve stem 2.

Claims

1. A manual-automatic integrated self-compensating triple-eccentric butterfly valve, comprising a valve body (1), a valve stem (2), a valve seat (3) and a butterfly plate (4), characterized in that, The valve body (1) is provided with a fixed seat (5) corresponding to the valve seat (3). The fixed seat (5) is an annular body protruding from one end of the valve cavity in a circle. The outer periphery of the valve seat (3) has a convex ring (6) corresponding to the fixed seat (5). The valve seat (3) is buckled on the fixed seat (5). A stepped fixed groove is further provided on the valve cavity outside the fixed seat (5). The back of the valve seat (3) also has a groove (7) in a circle. A lifting ring (8) is fixed on the fixed groove. One end of the lifting ring (8) facing the valve seat (3) has an abutting ring (9) corresponding to the groove (7). The abutting ring (9) is inserted into the groove (7) of the valve seat (3). An elastic ring (10) is further provided between the abutting ring (9) and the groove (7). The front of the valve seat (3) has an arc-shaped groove (11). The middle of the valve seat (3) has a tapered hole. The two side edges of the arc-shaped groove (11) are arc-transitionally connected to the edge of the valve seat (3) and the edge of the tapered hole. The connection between the arc-shaped groove (11) and the edge of the valve seat (3) protrudes from the connection between the arc-shaped groove (11) and the tapered hole. The sealing surface of the butterfly plate (4) corresponds to the shape of the front of the valve seat (3) and the tapered hole.

2. The self-compensating three-eccentric butterfly valve with manual and automatic integration according to claim 1, characterized in that, A sealing gasket is further provided between the valve seat (3) and the fixed seat (5).

3. The self-compensating three-eccentric butterfly valve with manual and automatic integration according to claim 1, characterized in that The elastic ring (10) is a rubber ring.

4. The self-compensating three-eccentric butterfly valve with manual and automatic integration according to claim 1, characterized in that The sealing surfaces of the valve seat (3) and the butterfly plate (4) are both of the structure of integral forging plus surfacing of hard alloy.

5. A manual-automatic integrated self-compensating triple-offset butterfly valve according to claim 1, characterized in that, The valve stem (2) is a double-axis valve stem. The back of the butterfly plate (4) has fixed ends (12) corresponding to the two valve stems (2).

6. The self-compensating three-eccentric butterfly valve with manual and automatic integration according to claim 5, characterized in that, The two valve stems (2) and the butterfly plate (4) are connected by splines.

7. A manual-automatic integrated self-compensating triple-eccentric butterfly valve according to claim 6, characterized in that, It further includes a transmission and execution mechanism arranged at the top of the valve body (1). The valve stem (2) and the transmission and execution mechanism are connected by splines.

8. A manual-automatic integrated self-compensating triple-eccentric butterfly valve according to claim 7, characterized in that, The transmission and execution mechanism is a manual transmission and execution mechanism or an electric transmission and execution mechanism.

9. The one kind of manual and automatic integrated self-compensating triple-eccentric butterfly valve as described in claim 8, characterized in that, The front of the butterfly plate (4) also has reinforcing ribs (13) in a grid structure.

10. A manual-automatic integrated self-compensating triple-eccentric butterfly valve according to claim 9, characterized in that, The bottom of the valve body (1) has an installation hole corresponding to the valve stem (2). A shaft sleeve (14) is arranged in the installation hole. A gasket, a spacer and a fixed flange (15) are sequentially arranged at the bottom of the installation hole. The fixed flange (15) is fixed to the bottom of the valve body (1) by fixing bolts. An anti-ejection ring (16) is further provided at the connection between the valve stem (2) and the shaft sleeve (14).

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