Ultralow-temperature flange butterfly valve

Abstract

The utility model discloses an ultralow-temperature flange butterfly valve, and belongs to the field of flange butterfly valves, the ultralow-temperature flange butterfly valve comprises a low-temperature valve whole, the low-temperature valve whole comprises a valve pipeline, mounting discs are mounted at the two ends of the valve pipeline, a plurality of connecting columns are arranged between the two mounting discs, and foot rings are arranged at the two ends of each connecting column; a vacuum cabin is installed at the top of the valve pipeline, an opening and closing rod penetrating through the vacuum cabin and the valve pipeline is arranged at the top of the vacuum cabin, a butterfly disc is arranged at the position, in the middle of the valve pipeline, of the opening and closing rod, a supporting head is arranged at the bottom of the opening and closing rod, and a rotating handle is installed at the top of the opening and closing rod. A vacuumizing assembly is arranged on one side of the vacuum cabin, the problem that when the overall temperature of the valve body is low, water molecules in air are likely to be condensed into water when passing through the surface of the valve body and then frozen into ice is solved, and particularly the situation that a user opens and closes the valve due to icing at the position of a switch rod is avoided; and the normal use of the device is influenced.

Description

Technical Field

[0001] This application relates to the field of flange butterfly valve technology, specifically to an ultra-low temperature flange butterfly valve. Background Technology

[0002] Cryogenic flange butterfly valves are valves specifically designed for extreme low-temperature environments and are widely used in the transportation systems of media such as liquefied natural gas, liquid nitrogen, and liquid oxygen. Their core feature is the use of low-temperature toughness materials, such as stainless steel, low-temperature carbon steel, or nickel-based alloys, and the use of metal seals or reinforced polytetrafluoroethylene (PTFE) seals to ensure sealing performance at low temperatures.

[0003] However, in ultra-low temperature working environments, the overall temperature of the valve body is low. Water molecules in the air easily condense into water when passing over the surface of the valve body, and then freeze into ice. Over the years, the surface ice layer becomes thick, especially at the switch rod position. If ice forms in this area, it will affect the user's ability to open and close the valve, thus affecting the normal use of the device.

[0004] Therefore, it is necessary to provide an ultra-low temperature flange butterfly valve to solve the above problems. Utility Model Content

[0005] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide an ultra-low temperature flange butterfly valve. Through this device, the rotating position of the opening and closing rod will not freeze due to the condensation of water molecules in the air. This avoids the problem that water molecules in the air easily condense into water and then freeze into ice when the overall temperature of the valve body is low. In particular, it avoids the problem that the user's opening and closing of the valve is affected by ice formation at the opening and closing position, thus affecting the normal use of the device.

[0006] The technical solution adopted by this application to solve its technical problem is: an ultra-low temperature flange butterfly valve, including a cryogenic valve assembly, the cryogenic valve assembly including a valve pipeline, both ends of the valve pipeline are equipped with mounting plates, several connecting columns are provided between the two mounting plates, both ends of the connecting columns are provided with foot rings, a vacuum chamber is installed at the top of the valve pipeline, an opening and closing rod penetrating the vacuum chamber and the valve pipeline is provided at the top of the vacuum chamber, a butterfly disc is provided at the middle of the opening and closing rod, a support head is provided at the bottom of the opening and closing rod, a rotating handle is installed at the top of the opening and closing rod, and a vacuum pumping assembly is provided on one side of the vacuum chamber.

[0007] Furthermore, the vacuum assembly includes a connecting pipe installed on one side of the vacuum chamber and connected to the vacuum chamber. A support plate is fixedly connected inside the connecting pipe. A sealing head movably connected to the support plate passes through the middle of the support plate. A spring is provided on the outer wall of the sealing head. A trigger housing is installed at the other end of the connecting pipe. A mounting bracket is slidably provided on one side of the trigger housing. A connector is installed on one side of the mounting bracket. A trigger bracket is installed inside the mounting bracket.

[0008] Furthermore, the top of the support head is fixedly connected to the bottom of the valve pipe, the opening and closing rod is rotatably connected to the support head, and the foot rings at both ends of the connecting column are fixedly connected to the nearest mounting plate.

[0009] Furthermore, the vacuum assembly is mounted on one of the connecting columns, and foot rings are used on both sides to fix the vacuum assembly. The vacuum chamber and the valve pipeline are connected by welding.

[0010] Furthermore, the sealing head is designed as a "protrusion". The sealing head includes a sealing plate and a sliding rod, wherein a spring is disposed on the outer wall of the sealing rod and its two ends are respectively connected to the support plate and the sealing head. The trigger frame includes a support frame and a push rod, wherein the push rod is in contact with the sealing head.

[0011] Furthermore, the trigger housing and the connecting pipe are in a connected state, wherein the diameter of the through hole in the trigger housing is adapted to the minimum diameter of the outer wall of the sealing head.

[0012] The beneficial effects of this application are:

[0013] This application provides an ultra-low temperature flange butterfly valve. With this device, the rotating position of the opening and closing rod will not freeze due to the condensation of water molecules in the air. This avoids the problem that water molecules in the air will easily condense into water and freeze into ice when the overall temperature of the valve body is low. In particular, it avoids the problem that ice formation at the opening and closing position will affect the user's opening and closing of the valve and affect the normal use of the device. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is an overall schematic diagram of a cryogenic flange butterfly valve according to this application;

[0016] Figure 2 for Figure 1 Schematic diagram of the overall cross-section of a medium- and low-temperature valve;

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of the vacuum pumping assembly;

[0018] The following are the labeling elements in the figure:

[0019] 1. Cryogenic valve assembly; 101. Valve piping; 102. Mounting plate; 103. Connecting column; 104. Foot ring; 105. Vacuum chamber; 106. Opening / closing lever; 107. Rotating handle; 108. Butterfly disc; 109. Support head; 110. Vacuuming assembly; 1101. Connecting pipe; 1102. Support plate; 1103. Sealing head; 1104. Spring; 1105. Trigger housing; 1106. Mounting bracket; 1107. Connecting head; 1108. Trigger bracket. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] like Figures 1-3 As shown, this application provides a cryogenic flange butterfly valve, including a cryogenic valve assembly 1. The cryogenic valve assembly 1 includes a valve pipe 101, with mounting plates 102 installed at both ends of the valve pipe 101. The two mounting plates 102 are used to connect the pipe to which the butterfly valve needs to be installed. A plurality of connecting posts 103 are provided between the two mounting plates 102. A foot ring 104 is provided at both ends of the connecting posts 103 for fixing the connecting posts 103. A vacuum chamber 105 is installed at the top of the valve pipe 101 for... The vacuum chamber 105 is equipped with a low-temperature isolation valve pipe 101. A valve rod 106 is installed at the top of the vacuum chamber 105, which runs through the vacuum chamber 105 and the valve pipe 101. The valve rod 106 is the main power transmission for opening and closing the device. A disc 108 is installed in the middle of the valve pipe 101. A support head 109 is installed at the bottom of the valve rod 106. A rotating handle 107 is installed at the top of the valve rod 106. A vacuum pumping assembly 110 is installed on one side of the vacuum chamber 105. The vacuum pumping assembly 110 is used to assist in vacuuming the vacuum chamber 105.

[0023] The vacuum assembly 110 includes a connecting pipe 1101 installed on one side of the vacuum chamber 105 and connected to the vacuum chamber 105. A support plate 1102 is fixedly connected inside the connecting pipe 1101. A sealing head 1103 is movably connected through the middle of the support plate 1102. The sealing head 1103 is used to seal the through hole opened in the trigger housing 1105. A spring 1104 is provided on the outer wall of the sealing head 1103. The spring 1104 is used to push the sealing head 1103 to seal. The other end of the connecting pipe 1101 is equipped with the trigger housing 1105. A mounting bracket 1106 is slidably provided on one side of the trigger housing 1105. The mounting bracket 1106 is used to open the sealing head 1103. A connector 1107 is installed on one side of the mounting bracket 1106. A trigger bracket 1108 is installed inside the mounting bracket 1106.

[0024] The top of the support head 109 is fixedly connected to the bottom of the valve pipe 101. The opening and closing rod 106 is rotatably connected to the support head 109. The foot rings 104 set at both ends of the connecting column 103 are fixedly connected to the nearest mounting plate 102. The vacuum assembly 110 is installed on one of the connecting columns 103, and foot rings 104 are used on both sides to fix the vacuum assembly 110. The vacuum chamber 105 is connected to the valve pipe 101 by welding.

[0025] The sealing head 1103 is designed as a "boss". The sealing head 1103 includes a sealing plate and a sliding rod. The spring 1104 is set on the outer wall of the sealing rod and its two ends are connected to the support plate 1102 and the sealing head 1103 respectively. The trigger frame 1108 includes a support frame and a push rod. The push rod is in contact with the sealing head 1103. The trigger housing 1105 and the connecting pipe 1101 are in a connected state. The diameter of the through hole in the trigger housing 1105 is adapted to the minimum diameter of the outer wall of the sealing head 1103.

[0026] Working principle:

[0027] Before using the device, first check all its components to ensure that they work properly and that the device can operate normally.

[0028] When using the device, firstly, the pipes to be connected are fixed using two mounting plates 102. After fixing, the user connects the vacuum pump to the connector 1107. The user starts the externally connected vacuum pump and pushes the connector 1107. The movement of the connector 1107 causes the mounting bracket 1106 to move, which in turn causes the trigger bracket 1108 to move. When the mounting bracket 1106 moves to its limit, the trigger bracket 1108 pushes open the sealing head 1103, preventing it from being exposed to the through hole in the sealing trigger housing 1105. The external vacuum pump then evacuates the vacuum chamber 105 through the trigger housing 1105 and the connecting pipe 1101. Because vacuum has a good effect of isolating heat transfer, it avoids the problem of condensation and freezing of water at the rotating position of the opening and closing rod 106, which would cause difficulty in rotating the device.

[0029] After the user has finished evacuating, the user first releases the pressed mounting bracket 1106. When the user no longer applies pressure, the spring 1104 rebounds and pushes the sealing head 1103 to seal the trigger housing 1105. When the spring 1104 has fully rebounded, the user releases the external vacuum pump connected to the connector 1107 to achieve vacuuming inside the vacuum chamber 105.

[0030] This device prevents the rotating position of the opening / closing lever 106 from freezing due to the condensation of water molecules in the air. It avoids the problem that water molecules in the air easily condense into water and then freeze when passing over the surface of the valve body when the overall temperature of the valve body is low. In particular, it avoids the problem that ice formation at the switch lever position would affect the user's ability to open and close the valve and affect the normal use of the device.

[0031] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cryogenic flange butterfly valve, comprising a cryogenic valve assembly (1), characterized in that: The cryogenic valve assembly (1) includes a valve pipe (101), with mounting plates (102) installed at both ends of the valve pipe (101), and several connecting posts (103) arranged between the two mounting plates (102). Foot rings (104) are provided at both ends of the connecting posts (103). A vacuum chamber (105) is installed at the top of the valve pipe (101). An opening and closing rod (106) penetrating the vacuum chamber (105) and the valve pipe (101) is provided at the top of the vacuum chamber (105). A butterfly plate (108) is provided at the middle of the valve pipe (101) on the opening and closing rod (106). A support head (109) is provided at the bottom of the opening and closing rod (106). A rotating handle (107) is installed at the top of the opening and closing rod (106). A vacuum pumping assembly (110) is provided on one side of the vacuum chamber (105).

2. The cryogenic flange butterfly valve according to claim 1, characterized in that: The vacuum assembly (110) includes a connecting pipe (1101) installed on one side of the vacuum chamber (105) and connected to the vacuum chamber (105). A support plate (1102) is fixedly connected inside the connecting pipe (1101). A sealing head (1103) is movably connected through the middle of the support plate (1102). A spring (1104) is provided on the outer wall of the sealing head (1103). A trigger housing (1105) is installed at the other end of the connecting pipe (1101). A mounting bracket (1106) is slidably provided on one side of the trigger housing (1105). A connector (1107) is installed on one side of the mounting bracket (1106). A trigger bracket (1108) is installed inside the mounting bracket (1106).

3. The cryogenic flange butterfly valve according to claim 1, characterized in that: The top of the support head (109) is fixedly connected to the bottom of the valve pipe (101), the opening and closing rod (106) is rotatably connected to the support head (109), and the foot rings (104) set at both ends of the connecting column (103) are fixedly connected to the nearest mounting plate (102).

4. The cryogenic flange butterfly valve according to claim 1, characterized in that: The vacuum assembly (110) is mounted on one of the connecting columns (103), and foot rings (104) are used on both sides to fix the vacuum assembly (110) to both sides. The vacuum chamber (105) is connected to the valve pipe (101) by welding.

5. A cryogenic flange butterfly valve according to claim 2, characterized in that: The sealing head (1103) is designed as a "boss". The sealing head (1103) includes a sealing plate and a sliding rod. A spring (1104) is disposed on the outer wall of the sealing rod and its two ends are connected to the support plate (1102) and the sealing head (1103) respectively. The trigger frame (1108) includes a support frame and a push rod, wherein the push rod is in contact with the sealing head (1103).

6. A cryogenic flange butterfly valve according to claim 2, characterized in that: The trigger housing (1105) and the connecting pipe (1101) are in a connected state, wherein the diameter of the through hole in the trigger housing (1105) is adapted to the minimum diameter of the outer wall of the sealing head (1103).

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