Ultralow-temperature gate valve

Abstract

The utility model relates to the technical field of control valves, in particular to an ultralow-temperature gate valve which comprises a valve body, a gate plate arranged on the valve body in a sliding mode, a valve seat used for being matched with the gate plate to seal the gate valve, a valve rod used for driving the gate plate to move, a hand wheel used for driving the valve rod to rotate and a heat preservation mechanism used for conducting heat preservation on the gate valve. The valve body is wrapped with the heat preservation cover and used for sealing and heat preservation of the valve body; the isolation assembly is arranged on the valve body and located above the heat preservation layer, and the isolation assembly is used for isolating the non-heat-preservation part from the heat preservation part and isolating condensate water generated above the isolation assembly. The hand wheel drives the valve rod to rotate and drives the gate plate to slide, so that opening or closing of the valve body is achieved, the valve body is wrapped and subjected to heat preservation through the heat preservation layer, accumulated water above the isolation assembly is blocked through the isolation assembly and drained in time, the probability that condensate water permeates into the heat preservation layer is reduced, and the service life of the valve body is prolonged. Therefore, the heat preservation effect of the gate valve on internal media is improved.

Description

Technical Field

[0001] The present application relates to the technical field of control valves, and in particular to ultra-low temperature gate valves. Background Art

[0002] The gate valve is a gate plate of an opening and closing part. The movement direction of the gate plate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate plate. Usually, the sealing surface will be welded with metal materials to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. The gate plate has a rigid gate plate and an elastic gate plate. According to the different gate plates, the gate valve is divided into a rigid gate valve and an elastic gate valve.

[0003] When the gate valve is used in ultra-low temperature scenarios, since the medium is ultra-low temperature, in order to facilitate the insulation of the medium, insulation materials will be wrapped on the transportation pipeline and the gate valve to achieve insulation of the medium. However, in order to adjust the gate valve, the handwheel part needs to be exposed. Due to the good thermal conductivity of steel, water in the air will condense and then flow into the insulation material, causing the insulation material to fail. Utility Model Content

[0004] In order to improve the thermal insulation effect of the gate valve on the internal medium, the present application provides an ultra-low temperature gate valve.

[0005] The ultra-low temperature gate valve provided in this application adopts the following technical solution:

[0006] The ultra-low temperature gate valve comprises a valve body, a gate plate slidably arranged on the valve body, a valve seat arranged on the valve body and used to cooperate with the gate plate to seal the gate valve, a valve stem rotatably arranged on the valve body and used to drive the gate plate to move, and a hand wheel arranged on the valve stem and used to drive the valve stem to rotate. The valve body is provided with a heat preservation mechanism for heat preservation of the gate valve, and the heat preservation mechanism comprises:

[0007] A thermal insulation layer, which is wrapped around the valve body and used to seal and insulate the valve body;

[0008] An isolation component is arranged on the valve body and located above the insulation layer. The isolation component is used to separate the uninsulated part from the insulation part and to isolate the condensed water generated above the isolation component.

[0009] By adopting the above technical scheme, the valve seat installed on the valve body cooperates with the gate plate, and at the same time the handwheel drives the valve stem to rotate and drives the gate plate to slide, so as to realize the opening or closing of the valve body, and the valve body is wrapped and insulated by the insulation layer, so that the valve body and the internal medium are isolated from the outside air, and the accumulated water above the isolation component is blocked and discharged in time by the isolation component, which reduces the probability of condensation water penetrating into the insulation layer, so that the insulation layer always has a good insulation effect, thereby improving the insulation effect of the gate valve on the internal medium.

[0010] Further, the isolation component comprises:

[0011] An isolation disc, which is arranged on the outer side wall of the valve body and is used to isolate condensed water generated in the upper part of the isolation;

[0012] A water guide pipe is arranged on the isolation disk and is used to discharge the accumulated water on the isolation disk out of the valve body.

[0013] By adopting the above technical solution, the isolation disk blocks the accumulated water above the isolation disk and discharges it in time through the water pipe, reducing the probability of condensed water penetrating into the insulation layer, so that the insulation layer always has a good insulation effect, thereby improving the insulation effect of the gate valve on the internal medium.

[0014] Furthermore, a water collecting trough is provided on the isolation tray, and the water collecting trough is used to collect the accumulated water on the isolation tray. The water guide pipe is arranged at the lowest point of the water collecting trough and discharges the accumulated water in the isolation tray.

[0015] By adopting the above technical solution, the water collection tank collects the accumulated water on the isolation tray to one place and discharges it through the water pipe, so that the accumulated water on the isolation tray is discharged in time, reducing the probability of condensed water penetrating into the insulation layer.

[0016] Furthermore, the isolation disk is made of a plastic material with poor thermal conductivity.

[0017] By adopting the above technical solution, the probability of the isolation disk condensing the water in the control is reduced, and the probability of water accumulation at the bottom of the isolation disk dripping onto the insulation layer is reduced.

[0018] Furthermore, the thermal insulation layer is composed of a thermal insulation material with good thermal insulation performance, and a waterproof layer is arranged on the thermal insulation layer to prevent the entry of accumulated water.

[0019] By adopting the above technical solution, thermal insulation material with good thermal insulation performance is wrapped on the valve body to form an insulation layer, so that the valve body is isolated from the outside air, so that the temperature in the insulation layer remains relatively constant, and the waterproof layer is formed by wrapping a plastic film with waterproof function on the insulation layer, so that the accumulated water dripping on the waterproof layer cannot enter the insulation layer, reducing the probability of accumulated water entering the insulation layer.

[0020] Furthermore, the valve body is provided with a valve cover for sealing the top of the valve body, and the valve cover and the valve body are connected to each other through a connecting assembly, and the connecting assembly includes:

[0021] A sealing gasket block, wherein the sealing gasket block is arranged on the valve body;

[0022] A stud bolt, which is arranged on the valve body and passes through the valve cover;

[0023] A fixing nut is threadedly connected to the stud and presses the valve cover against the sealing gasket.

[0024] By adopting the above technical solution, the sealing gasket is fixedly installed on the top of the valve body, and the valve cover is fixedly installed on the end of the sealing gasket away from the valve body; the stud passes through the valve cover and fixes the valve cover to the sealing gasket through the fixing nut, so that the connection between the valve body and the valve cover is tighter.

[0025] Furthermore, the sealing gasket is made of rubber material, and is used to enhance the sealing performance of the valve body and the valve cover and reduce the temperature conduction between the valve body and the valve cover.

[0026] By adopting the above technical solution, the rubber has good compression resilience, so that the sealing between the valve body and the valve cover is good. At the same time, the rubber material has low thermal conductivity, thereby reducing the temperature conduction between the valve body and the valve cover.

[0027] Furthermore, the gate plate is rotatably connected to the valve stem, and the width of the gate plate becomes narrower as it approaches the bottom of the valve body.

[0028] By adopting the above technical solution, due to the ultra-low temperature environment, the gate plate is easy to stick and solidify on the bottom of the valve seat. The closer the gate plate is to the bottom of the valve body, the narrower the width is, making it easier for the valve body to move away from the bottom of the valve body to open the channel.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] The valve body and part of the valve cover are wrapped and insulated by the insulation layer, so that the valve body and the internal medium are isolated from the outside air. The sealing gasket further prevents the temperature conduction from the valve body to the valve cover. The accumulated water above the isolation plate is blocked by the isolation plate and discharged in time through the water pipe. At the same time, the waterproof layer prevents the accumulated water from entering the insulation layer, reducing the probability of condensed water penetrating into the insulation layer, so that the insulation layer always has a good insulation effect, thereby improving the insulation effect of the gate valve on the internal medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of a half-section structure of a gate valve of the present application;

[0032] Figure 2 yes Figure 1 Enlarged schematic diagram of part A in the middle.

[0033] Figure numerals: 1. valve body; 11. channel; 2. gate; 3. valve stem; 31. handwheel; 4. valve cover; 5. connecting assembly; 51. sealing gasket; 52. stud; 53. fixing nut; 6. insulation mechanism; 7. insulation layer; 8. isolation assembly; 81. isolation plate; 811. water collecting trough; 82. water guide pipe; 9. waterproof layer. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-2 This application is described in further detail.

[0035] The embodiments of the present application disclose an ultra-low temperature gate valve.

[0036] Reference Figure 1 The ultra-low temperature gate valve comprises a valve body 1, a gate plate 2 slidingly arranged on the valve body 1, a valve seat arranged on the valve body 1 and used to cooperate with the gate plate 2 to seal the gate valve, a valve stem 3 rotatably arranged on the valve body 1 and used to drive the gate plate 2 to move, a hand wheel 31 arranged on the valve stem 3 and used to drive the valve stem 3 to rotate, and a heat preservation mechanism 6 for keeping the gate valve warm is arranged on the valve body 1.

[0037] Reference Figure 1 A passage 11 for medium to pass through is provided in the valve body 1, a gate plate 2 is slidably mounted on the valve body 1, a valve seat is fixedly mounted inside the valve body 1, and the gate plate 2 cooperates with the valve seat to open or close the passage 11; the closer the gate plate 2 is to the bottom of the valve body 1, the narrower the width is, making it easier for the valve body 1 to move away from the bottom of the valve body 1 to open the passage 11. Due to the low temperature of the medium, when the passage 11 is closed for a long time, the gate plate 2 is easy to stick and solidify on the bottom of the valve seat. The closer the gate plate 2 is to the bottom of the valve body 1, the narrower the width is, so when the gate plate 2 slides away from the bottom of the valve body 1, the width of the sliding track in contact with the gate plate 2 becomes wider and wider, which is convenient for opening the passage 11; a valve cover 4 is provided on the top of the valve body 1 to seal the top of the valve body 1 The valve cover 4 and the valve body 1 are connected to each other through a connecting assembly 5, and the connecting assembly 5 includes a sealing gasket 51, a stud 52 and a fixing nut 53. The sealing gasket 51 is an annular structure, and the sealing gasket 51 is fixedly mounted on the top of the valve body 1, and the valve cover 4 is fixedly mounted on the end of the sealing gasket 51 away from the valve body 1; the stud 52 is fixedly mounted on the valve body 1 and passes through the valve cover 4, and the fixing nut 53 is threadedly connected to the stud 52 and presses the valve cover 4 against the sealing gasket 51; the sealing gasket 51 is made of rubber material, and the rubber material has good compression resilience, which is used to enhance the sealing between the valve body 1 and the valve cover 4. At the same time, the rubber material has low thermal conductivity, thereby reducing the temperature conduction between the valve body 1 and the valve cover 4.

[0038] Reference Figure 1 and Figure 2 , the valve stem 3 is rotatably mounted on the gate plate 2, the valve stem 3 passes through the valve cover 4 and is threadedly connected to the top of the valve cover 4, and the passage 11 is opened or closed by rotating the valve stem 3 and driving the gate plate 2 to slide, and a hand wheel 31 for driving the valve stem 3 to rotate is provided on the valve stem 3, and the hand wheel 31 is convenient for driving the valve stem 3 to rotate; the heat preservation mechanism 6 includes a heat preservation layer 7 and an isolation component 8, and the heat preservation layer 7 is composed of a heat preservation material with good heat preservation performance wrapped on the valve body 1 and part of the valve cover 4, and the heat preservation layer 7 isolates the valve body 1 from the outside air, so that the temperature in the heat preservation layer 7 remains relatively constant. A waterproof layer 9 is provided on the heat preservation layer 7 to prevent the entry of accumulated water, and the waterproof layer 9 is formed by a plastic film with a waterproof function wrapped on the heat preservation layer 7, so that the accumulated water dripping on the waterproof layer 9 cannot enter the heat preservation layer 7, reducing the probability of accumulated water entering the heat preservation layer 7.

[0039] Reference Figure 1 and Figure 2 The isolation component 8 is arranged on the valve body 1 and is located above the insulation layer 7. The isolation component 8 is used to separate the uninsulated part of the valve body 1 and the valve cover 4 from the insulation part, and at the same time isolate the condensed water generated above the isolation component 8. Due to the good thermal conductivity of steel, the temperature of the ultra-low temperature medium is transmitted through the valve body 1 and the valve cover 4 to the part of the valve cover 4, the hand wheel 31 and other components above the isolation component 8. The water in the air will condense on the part of the valve cover 4, the hand wheel 31 and other components, and flow downward along the valve cover 4; the isolation component 8 includes an isolation plate 81 and a water guide pipe 82. The isolation plate 81 is a circular ring structure. The isolation plate 81 is fixedly installed on the connecting neck of the valve cover 4. The isolation plate 81 The accumulated water above the isolation tray 81 is blocked. The isolation tray 81 is made of a plastic material with poor thermal conductivity, which reduces the probability of the isolation tray 81 condensing the controlled moisture, and further reduces the probability of water accumulating at the bottom of the isolation tray 81 and dripping onto the insulation layer 7; a water collecting trough 811 is provided on the upper surface of the isolation tray 81, and the water collecting trough 811 is used to collect the accumulated water on the isolation tray 81 to the lowest point; the water pipe 82 is fixedly installed on the isolation tray 81, and the other end of the water pipe 82 is away from the valve body 1. The water pipe 82 is connected to the lowest point of the water collecting trough 811, so that the accumulated water in the isolation tray 81 can be discharged in time, reducing the amount of water accumulated in the isolation tray 81.

[0040] The working principle of the embodiment of the present application is as follows:

[0041] The valve body 1 and part of the valve cover 4 are wrapped and insulated by the insulation layer 7, so that the valve body 1 and the internal medium are isolated from the outside air, and the sealing gasket 51 further prevents the valve body 1 from conducting temperature to the valve cover 4. The isolation disk 81 is used to block the accumulated water above the isolation disk 81 and discharge it in time through the water pipe 82. At the same time, the waterproof layer 9 blocks the accumulated water from entering the insulation layer 7, reducing the probability of condensed water penetrating into the insulation layer 7, so that the insulation layer 7 always has a good insulation effect, thereby improving the insulation effect of the gate valve on the internal medium.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An ultra-low temperature gate valve, comprising a valve body (1), a gate plate (2) slidably disposed on the valve body (1), a valve seat disposed on the valve body (1) and used to cooperate with the gate plate (2) to seal the gate valve, a valve stem (3) rotatably disposed on the valve body (1) and used to drive the gate plate (2) to move, and a hand wheel (31) disposed on the valve stem (3) and used to drive the valve stem (3) to rotate, characterized in that: The valve body (1) is provided with a heat preservation mechanism (6) for heat preservation of the gate valve, and the heat preservation mechanism (6) comprises: A thermal insulation layer (7), the thermal insulation layer (7) being wrapped around the valve body (1) and used to seal and insulate the valve body (1); An isolation component (8) is arranged on the valve body (1) and is located above the insulation layer (7), and the isolation component (8) is used to separate the uninsulated part from the insulation part and to isolate condensed water generated above the isolation component (8).

2. The ultra-low temperature gate valve according to claim 1, characterized in that: The isolation component (8) comprises: An isolation disk (81), wherein the isolation disk (81) is arranged on an outer side wall of the valve body (1) and is used to isolate condensed water generated above the isolation disk (81); A water guide pipe (82), wherein the water guide pipe (82) is arranged on the isolation disk (81) and is used to discharge the accumulated water on the isolation disk (81) out of the valve body (1).

3. The ultra-low temperature gate valve according to claim 2, characterized in that: The isolation disk (81) is provided with a water collecting trough (811), and the water collecting trough (811) is used to collect the accumulated water on the isolation disk (81). The water guide pipe (82) is arranged at the lowest point of the water collecting trough (811) and discharges the accumulated water in the isolation disk (81).

4. The ultra-low temperature gate valve according to claim 3, characterized in that: The isolation disc (81) is made of a plastic material with poor thermal conductivity.

5. The ultra-low temperature gate valve according to claim 1, characterized in that: The thermal insulation layer (7) is composed of a thermal insulation material with good thermal insulation performance, and a waterproof layer (9) is provided on the thermal insulation layer (7) for preventing the entry of accumulated water.

6. The ultra-low temperature gate valve according to claim 1, characterized in that: The valve body (1) is provided with a valve cover (4) for sealing the top of the valve body (1), and the valve cover (4) and the valve body (1) are connected to each other via a connecting assembly (5), and the connecting assembly (5) comprises: A sealing gasket (51), wherein the sealing gasket (51) is arranged on the valve body (1); A stud bolt (52), wherein the stud bolt (52) is arranged on the valve body (1) and passes through the valve cover (4); A fixing nut (53) is threadedly connected to the stud (52) and presses the valve cover (4) against the sealing gasket (51).

7. The ultra-low temperature gate valve according to claim 6, characterized in that: The sealing gasket (51) is made of a rubber material and is used to enhance the sealing performance of the valve body (1) and the valve cover (4) and to reduce the temperature conduction between the valve body (1) and the valve cover (4).

8. The ultra-low temperature gate valve according to claim 1, characterized in that: The gate plate (2) is rotatably connected to the valve stem (3), and the width of the gate plate (2) becomes narrower as it approaches the bottom of the valve body (1).

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