All-metal low-temperature zero-leakage butterfly valve

Abstract

The utility model relates to the technical field of valves, in particular to an all-metal low-temperature zero-leakage butterfly valve which comprises a valve body, a butterfly plate, a valve rod and a valve cover connected with the valve body, a medium channel is arranged in the valve body, a valve seat is arranged in the medium channel, and the butterfly plate and the valve seat are matched in a sealing mode to divide the medium channel into an inlet channel and an outlet channel. One end of the valve rod is connected with the butterfly plate, the other end of the valve rod penetrates through the valve cover and extends to the outer side, the butterfly plate is connected with a sealing assembly, the sealing assembly comprises a hard alloy ring and a mounting block, the mounting block is in threaded connection with the butterfly plate through a first bolt, and the hard alloy ring is clamped between the mounting block and the butterfly plate; the butterfly valve is provided with a sealing structure with better durability, namely, the sealing assembly connected with the butterfly plate is in sealing fit with the valve seat through the hard alloy ring, and zero leakage of the butterfly valve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an all-metal low-temperature zero-leakage butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve. Its closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing or regulation. It is suitable for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media, and mainly plays a role of cutting off and throttling in pipelines.

[0003] With the rapid development of butterfly valves, butterfly valves with a wide range of applications are also used to transport low-temperature media. However, under low-temperature conditions, all aspects of the performance of the butterfly valve will be greatly tested. During use, the butterfly plate of the butterfly valve needs to rotate. During the rotation process, the butterfly plate will produce a certain friction with the valve seat. Under long-term operation, the sealing surface of the butterfly plate will be worn out, and the low-temperature medium will leak from between the worn sealing surfaces, which will lead to valve failure. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide an all-metal low-temperature zero-leakage butterfly valve. The utility model has a sealing structure with better durability, that is, a sealing component connected to the butterfly plate, which cooperates with the valve seat through a carbide ring to ensure zero leakage of the butterfly valve.

[0005] The technical solution adopted by the utility model is as follows: an all-metal low-temperature zero-leakage butterfly valve, including a valve body, a butterfly plate, a valve stem and a valve cover connected to the valve body, a medium channel is provided in the valve body, a valve seat is provided in the medium channel, the butterfly plate and the valve seat seal and cooperate to separate the medium channel into an inlet channel and an outlet channel, one end of the valve stem is connected to the butterfly plate and the other end extends to the outside through the valve cover, a sealing assembly is connected to the butterfly plate, the sealing assembly includes a carbide ring and a mounting block, the mounting block is threadedly connected to the butterfly plate by a first bolt, the carbide ring is clamped between the mounting block and the butterfly plate, and the butterfly plate forms a sealing fit with the valve seat through the carbide ring.

[0006] It also includes a vacuum jacket arranged on the outside of the valve body, one end of the valve body is extended with an extension body and a flange for the valve stem to pass through, the valve body is connected to the valve cover through the flange, one end of the vacuum jacket is connected to the valve body and the other end is connected to the flange, and a vacuum chamber is formed between the vacuum jacket and the extension body.

[0007] A detection block is protruded from the outer wall of the vacuum jacket. The detection block is provided with a detection hole connected to the vacuum chamber. The detection block is also threadedly connected with a second bolt, and the second bolt is used to connect or block the detection hole.

[0008] A baffle plate surrounding the second bolt is protruded from the edge of one end of the detection block, an operating hole is opened at the inner edge of the baffle plate, and the inner diameter of the operating hole is smaller than the diameter of the second bolt.

[0009] It also includes a support component and an elastic member. The outer wall of the extension body is provided with a mounting groove for the support component to extend into. The support component is threadedly connected to the mounting groove through a third bolt. One end of the elastic member abuts against the support component and the other end abuts against the inner wall of the vacuum jacket.

[0010] The support assembly is provided with a limiting groove for the elastic member to extend into, and a conical ring extends from the inner edge of the limiting groove, and the conical ring limits the end of the elastic member in the limiting groove.

[0011] The support assembly comprises a first support block and a second support block. A clamping block is protruded from the side of one end of the first support block extending into the installation groove, and a clamping groove matched with the clamping block is recessed in the second support block.

[0012] A wave surface is provided on one inner wall of the installation groove.

[0013] The valve body, butterfly plate, valve stem, valve cover and valve seat are all made of full metal material.

[0014] The beneficial effects of the utility model are as follows: the utility model has a more durable sealing structure, that is, the sealing component connected to the butterfly plate is sealed with the valve seat through a hard alloy ring, and the hard alloy ring that is difficult to wear can provide better sealing effect and service life, ensuring zero leakage of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0016] Figure 1 This is a schematic diagram of the structure of the all-metal low-temperature zero-leakage butterfly valve of the utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0018] Figure 3 for Figure 1 A schematic diagram of the local enlarged structure at B in the middle;

[0019] Figure 4 for Figure 1A schematic diagram of the local enlarged structure at C in the middle;

[0020] In the figure, 1-valve body, 2-butterfly plate, 3-valve stem, 4-valve cover, 5-medium channel, 6-valve seat, 7-carbide ring, 8-mounting block, 9-first bolt, 10-vacuum jacket, 11-extension body, 12-flange, 13-vacuum chamber, 14-detection block, 15-detection hole, 16-second bolt, 17-baffle, 18-operating hole, 19-support assembly, 20-elastic member, 21-mounting groove, 22-third bolt, 23-limiting groove, 24-conical ring, 25-first support block, 26-second support block, 27-block, 28-slot, 29-wavy surface. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0022] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0023] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0024] like Figures 1 to 4 As shown, an embodiment of the utility model is an all-metal low-temperature zero-leakage butterfly valve, comprising a valve body 1, a butterfly plate 2, a valve stem 3 and a valve cover 4 connected to the valve body 1, a medium channel 5 is provided in the valve body 1, a valve seat 6 is provided in the medium channel 5, the butterfly plate 2 and the valve seat 6 seal and cooperate to separate the medium channel 5 into an inlet channel and an outlet channel, one end of the valve stem 3 is connected to the butterfly plate 2 and the other end passes through the valve cover 4 and extends to the outside, a sealing assembly is connected to the butterfly plate 2, the sealing assembly comprises a carbide ring 7 and a mounting block 8, the mounting block 8 is threadedly connected to the butterfly plate 2 through a first bolt 9, the carbide ring 7 is clamped between the mounting block 8 and the butterfly plate 2, and the butterfly plate 2 forms a sealing fit with the valve seat 6 through the carbide ring 7.

[0025] The beneficial effects of such a setting are as follows: the utility model has a more durable sealing structure, that is, the sealing component connected to the butterfly plate is sealed with the valve seat through a carbide ring, and the carbide ring that is difficult to wear can provide better sealing effect and service life, ensuring zero leakage of the butterfly valve.

[0026] Further, it includes a vacuum jacket 10 arranged on the outside of the valve body 1, one end of the valve body 1 is extended with an extension body 11 for the valve stem 3 to pass through and a flange 12, the valve body 1 is connected to the valve cover 4 through the flange 12, one end of the vacuum jacket 10 is connected to the valve body 1 and the other end is connected to the flange 12, and a vacuum chamber 13 is formed between the vacuum jacket 10 and the extension body 11.

[0027] The beneficial effects of such a configuration are as follows: the valve body is extended with an extension body, which can increase the thermal bridge and reduce heat loss. A vacuum jacket is installed on the outside of the valve body to form a vacuum chamber between the valve body and the vacuum jacket, further reducing heat loss, shortening the cooling time, and stably transporting the low-temperature medium.

[0028] It is further provided that a detection block 14 is protruded from the outer wall of the vacuum jacket 10 , and the detection block 14 is provided with a detection hole 15 connected to the vacuum chamber 13 . The detection block 14 is also threadedly connected with a second bolt 16 , and the second bolt 16 is used to connect or block the detection hole 15 .

[0029] The beneficial effects of such a setting are as follows: the vacuum environment in the vacuum chamber can be detected through the detection hole on the detection block, helping the vacuum chamber to maintain a vacuum environment. The detection hole is blocked by the second bolt, and detection can be performed by simply loosening the second bolt to connect the detection hole. There is no need to completely remove the second bolt, which facilitates operation and simplifies the detection steps.

[0030] It is further provided that a baffle 17 surrounding the second bolt 16 is protruded from one end edge of the detection block 14 , an operating hole 18 is opened on the inner edge of the baffle 17 , and the inner diameter of the operating hole 18 is smaller than the diameter of the second bolt 16 .

[0031] The beneficial effect of such arrangement is as follows: the operating hole on the baffle allows the tool for disassembling the second bolt to be inserted without taking the second bolt out together, and the disassembled second bolt is stored in the baffle to prevent the loss of parts.

[0032] Further configuration includes a support assembly 19 and an elastic member 20. The outer wall of the extension body 11 is provided with a mounting groove 21 for the support assembly 19 to extend into. The support assembly 19 is threadedly connected to the mounting groove 21 via a third bolt 22. One end of the elastic member 20 abuts against the support assembly 19 and the other end abuts against the inner wall of the vacuum jacket 10.

[0033] The beneficial effects of such an arrangement are as follows: the supporting force of the vacuum jacket is provided by the supporting assembly and the elastic member, thereby ensuring the structural stability of the vacuum jacket.

[0034] It is further provided that the support assembly 19 is provided with a limiting groove 23 for the elastic member 20 to extend into, and a conical ring 24 extends from the inner edge of the limiting groove 23 , and the conical ring 24 limits the end of the elastic member 20 in the limiting groove 23 .

[0035] The beneficial effects of such a configuration are as follows: the end of the elastic member is limited and fixed by the limiting groove in cooperation with the conical ring, thereby providing stability to the elastic member and preventing the elastic member from falling off, slipping, and twisting.

[0036] It is further configured that the support assembly 19 includes a first support block 25 and a second support block 26 . The first support block 25 has a block 27 protruding from one end of the side extending into the installation groove 21 , and the second support block 26 has a recessed slot 28 matched with the block 27 .

[0037] The beneficial effects of such a setting are as follows: the support assembly consists of a first support block and a second support block. The detachable structure has the advantage of easy disassembly and assembly. The cooperation between the clamping block and the groove can help the first support block and the second support block to dock, and the parts will not become loose during disassembly and assembly due to the third bolt not being tightened.

[0038] It is further provided that a wave surface 29 is provided on an inner wall of one side of the installation groove 21 .

[0039] The beneficial effects of such a configuration are as follows: the wavy surface of the mounting groove allows the support assembly to slide into or out of the mounting groove, thereby reducing friction and facilitating assembly and disassembly of the support assembly.

[0040] It is further provided that the valve body 1, the butterfly plate 2, the valve stem 3, the valve cover 4 and the valve seat 6 are all made of full metal material.

[0041] The beneficial effects of such a setting are as follows: the all-metal material has better stability, high structural strength, wear resistance and long service life.

[0042] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. An all-metal low-temperature zero-leakage butterfly valve, comprising a valve body (1), a butterfly plate (2), a valve stem (3), and a valve cover (4) connected to the valve body (1), wherein a medium channel (5) is provided in the valve body (1), a valve seat (6) is provided in the medium channel (5), the butterfly plate (2) and the valve seat (6) are sealed to separate the medium channel (5) into an inlet channel and an outlet channel, one end of the valve stem (3) is connected to the butterfly plate (2) and the other end passes through the valve cover (4) and extends to the outside, characterized in that: The butterfly plate (2) is connected to a sealing assembly, the sealing assembly comprising a hard alloy ring (7) and a mounting block (8), the mounting block (8) being threadedly connected to the butterfly plate (2) via a first bolt (9), the hard alloy ring (7) being clamped between the mounting block (8) and the butterfly plate (2), and the butterfly plate (2) forms a sealing fit with the valve seat (6) via the hard alloy ring (7).

2. The all-metal low-temperature zero-leakage butterfly valve according to claim 1 is characterized in that: The invention also comprises a vacuum jacket (10) arranged on the outside of the valve body (1); an extension body (11) and a flange (12) extending from one end of the valve body (1) for the valve stem (3) to pass through; the valve body (1) is connected to the valve cover (4) via the flange (12); one end of the vacuum jacket (10) is connected to the valve body (1) and the other end is connected to the flange (12); a vacuum chamber (13) is formed between the vacuum jacket (10) and the extension body (11).

3. The all-metal low-temperature zero-leakage butterfly valve according to claim 2 is characterized in that: A detection block (14) is protruded from the outer wall of the vacuum jacket (10), and the detection block (14) is provided with a detection hole (15) connected to the vacuum chamber (13). The detection block (14) is also threadedly connected to a second bolt (16), and the second bolt (16) is used to connect or block the detection hole (15).

4. The all-metal low-temperature zero-leakage butterfly valve according to claim 3 is characterized in that: A baffle (17) surrounding the second bolt (16) is protruded from the edge of one end of the detection block (14); an operating hole (18) is provided on the inner edge of the baffle (17); and the inner diameter of the operating hole (18) is smaller than the diameter of the second bolt (16).

5. The all-metal low-temperature zero-leakage butterfly valve according to claim 2 is characterized in that: It also includes a support component (19) and an elastic member (20); the outer wall of the extension body (11) is provided with a mounting groove (21) for the support component (19) to extend into; the support component (19) is threadedly connected to the mounting groove (21) via a third bolt (22); one end of the elastic member (20) abuts against the support component (19) and the other end abuts against the inner wall of the vacuum jacket (10).

6. The all-metal low-temperature zero-leakage butterfly valve according to claim 5 is characterized in that: The support assembly (19) is provided with a limiting groove (23) for the elastic member (20) to extend into, and a conical ring (24) extends from the inner edge of the limiting groove (23), and the conical ring (24) limits the end of the elastic member (20) in the limiting groove (23).

7. The all-metal low-temperature zero-leakage butterfly valve according to claim 5 is characterized in that: The support assembly (19) comprises a first support block (25) and a second support block (26); a clamping block (27) is protruded from the side surface of one end of the first support block (25) extending into the installation groove (21); and a clamping groove (28) is recessed in the second support block (26) and matched with the clamping block (27).

8. The all-metal low-temperature zero-leakage butterfly valve according to claim 5 is characterized in that: A wavy surface (29) is provided on one inner wall of the installation groove (21).

9. The all-metal low-temperature zero-leakage butterfly valve according to claim 1, characterized in that: The valve body (1), butterfly plate (2), valve stem (3), valve cover (4) and valve seat (6) are all made of full metal material.

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