A vacuum valve box

Abstract

This utility model discloses a vacuum valve box, including a vacuum valve box body, a natural gas pipe, a first chamber, a second chamber, and a third chamber. The vacuum valve box body contains the first, second, and third chambers, with the first chamber located to one side of the second chamber and the third chamber located to the side of the second chamber away from the first chamber. Three vacuum pipes are disposed outside the vacuum valve box body. This utility model not only effectively reduces liquid cooling loss and improves economic efficiency by using a vacuum valve box, but also facilitates valve maintenance and replacement without other maintenance costs. Furthermore, dividing the vacuum valve box body into three chambers ensures that a problem in one chamber will not affect the use of other chambers. The vacuum valve box is also small in size and compact in layout, requiring little installation space and effectively improving the space utilization of the liquefied natural gas dispenser.

Description

Technical Field

[0001] This utility model relates to the field of valve box technology, specifically a vacuum valve box. Background Technology

[0002] Vacuum valve boxes are primarily used in liquefied natural gas (LNG) dispensers. They centralize the valves required for control within the dispenser into a stainless steel housing, which is then evacuated to a high vacuum. This effectively minimizes the amount of vaporization caused by the flow of LNG.

[0003] Traditional liquid dispensers use ordinary stainless steel pipes with insulation to control valves. This method involves cumbersome on-site manufacturing processes and poor insulation, resulting in the loss of cooling capacity of the cryogenic liquid and significantly increasing costs. Furthermore, valve repair and replacement require the removal of the original insulation, followed by its restoration after repair or replacement, making construction difficult and costly. Utility Model Content

[0004] The purpose of this invention is to provide a vacuum valve box to solve the problems mentioned in the background art, where the valves controlled inside the liquid dispenser are made of ordinary stainless steel pipes with insulation covering. This method involves cumbersome on-site manufacturing processes and poor insulation performance, resulting in the loss of cold liquid capacity and significantly increasing costs. Furthermore, valve repair and replacement require the removal of the original insulation, followed by restoration after repair or replacement, which is difficult and costly to implement.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vacuum valve box, comprising a vacuum valve box body, a natural gas pipe, a first chamber, a second chamber, and a third chamber; the vacuum valve box body is provided with the first chamber, the second chamber, and the third chamber, the first chamber being located on one side of the second chamber, and the third chamber being located on the side of the second chamber away from the first chamber; the vacuum valve box body is provided with three vacuum tubes, the three vacuum tubes being respectively connected to the first chamber, the second chamber, and the third chamber.

[0006] Preferably, the vacuum valve box further includes a natural gas pipe, which is provided in three sets, with each set of natural gas pipes passing through the first chamber, the second chamber and the third chamber in sequence.

[0007] Preferably, the vacuum valve housing is provided with a sealing plate assembly, which seals the vacuum valve housing.

[0008] Preferably, the sealing plate assembly includes a first sealing plate connected to the third chamber, the four sides of the first sealing plate being longer than the four sides of the third chamber.

[0009] Preferably, a second sealing plate is connected to the second chamber, and the side of the second sealing plate near the first sealing plate abuts against the side of the first sealing plate.

[0010] Preferably, a third sealing plate is connected to the first chamber, and the third sealing plate is located on one side of the second sealing plate and abuts against the side edge of the second sealing plate.

[0011] Preferably, a control valve is connected to each of the first sealing plate, the second sealing plate, and the third sealing plate, and the control valve extends into the first chamber, the second chamber, and the first sealing plate and is connected to the control valve.

[0012] Preferably, the first sealing plate is located below the third sealing plate and is designed as an inclined plate, which is consistent with the top inclined surface of the second chamber.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: This vacuum valve box not only effectively reduces liquid cooling loss and improves economic efficiency, but also facilitates valve maintenance and replacement without any other maintenance costs. Furthermore, dividing the vacuum valve box into three chambers (first, second, and third) ensures that a problem in one chamber will not affect the use of other chambers. The vacuum valve box is also small in size and has a compact layout, requiring minimal installation space and effectively improving the space utilization of the liquefied natural gas dispenser. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0017] Figure 4 For the present utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0018] In the picture:

[0019] 1. Vacuum valve housing; 11. Vacuum tube; 12. First chamber; 13. Second chamber; 14. Third chamber; 2. Natural gas pipe; 3. Control valve; 4. First sealing plate; 5. Second sealing plate; 6. Third sealing plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1: As Figure 1-4 As shown, a vacuum valve box includes a vacuum valve body 1, a natural gas pipe 2, a first chamber 12, a second chamber 13, and a third chamber 14. Three vacuum pipes 11 are welded to the outside of the vacuum valve body 1. The vacuum valve body 1 is hollow, and the interior of the vacuum valve body 1 connects to the vacuum valve through the vacuum pipes 11 to perform vacuuming operations. The vacuum valve body 1 is made of 06Cr19Ni10 stainless steel plate. The vacuum valve body 1 contains the first chamber 12, the second chamber 13, and the third chamber 14, which are arranged within the vacuum valve body 1 as follows: Figure 3 The three chambers are arranged sequentially as shown, and are separated by a partition integrally formed with the vacuum valve housing 1. In other words, the first chamber 12, the second chamber 13, and the third chamber 14 are independent chambers. When a fault such as a leak occurs in the natural gas pipe 2 in a single chamber, they can be operated separately without affecting each other. The first chamber 12 is located on one side of the second chamber 13, and the third chamber 14 is located on the side of the second chamber 13 away from the first chamber 12. The three vacuum pipes 11 are connected to the first chamber 12, the second chamber 13, and the third chamber 14 respectively, which facilitates the individual maintenance and repair of the natural gas pipe 2 in each chamber.

[0022] A sealing plate assembly is provided on the vacuum valve housing 1. The sealing plate assembly seals the inside of the vacuum valve housing 1 and performs sealing operations on the first chamber 12, the second chamber 13 and the third chamber 14 to reduce leakage in the first chamber 12, the second chamber 13 and the third chamber 14 during use.

[0023] It should be noted that the sealing plate assembly includes a first sealing plate 4 connected to the third chamber 14 by bolts, flange sealing rubber gaskets, etc. The four sides of the first sealing plate 4 are longer than the four sides of the third chamber 14, and the first sealing plate 4 seals the third chamber 14 separately.

[0024] Furthermore, a second sealing plate 5 is connected to the second chamber 13 by bolts, flange sealing rubber gaskets, etc. The side of the second sealing plate 5 closest to the first sealing plate 4 abuts against the side of the first sealing plate 4, wherein the second sealing plate 5 provides a single seal for the second chamber 13.

[0025] Furthermore, a third sealing plate 6 is connected to the first chamber 12 by bolts and flange sealing rubber gaskets. The third sealing plate 6 is located on one side of the second sealing plate 5 and abuts against the side edge of the second sealing plate 5, wherein the third sealing plate 6 separately seals the first chamber 12.

[0026] The first sealing plate 4 is located below the third sealing plate 6 and is designed as an inclined plate. This inclined plate is consistent with the top inclined surface of the second chamber 13, which makes it convenient for the first sealing plate 4 and the second sealing plate 5 to abut against each other while still sealing the third chamber 14. At the same time, the second sealing plate 5 can perform sealing operations on the second chamber 13.

[0027] It should be noted that using a vacuum valve housing 1 effectively reduces liquid cooling loss, improves economic efficiency, facilitates valve maintenance and replacement without any other maintenance costs, and features a small and compact design. This requires minimal installation space, effectively increasing the space utilization of the liquefied natural gas dispenser.

[0028] The overall effect achieved by Embodiment 1 is that the first chamber 12, the second chamber 13, and the third chamber 14 are within the vacuum valve housing 1 as follows: Figure 3 The chambers are arranged sequentially as shown, and are separated by partitions integrally formed with the vacuum valve housing 1. The first chamber 12, second chamber 13, and third chamber 14 are sealed by the first sealing plate 4, second sealing plate 5, and third sealing plate 6, respectively. This means that the first chamber 12, second chamber 13, and third chamber 14 are independent chambers. In the event of a leak or other malfunction in the natural gas pipe 2 of a single chamber, each chamber can be operated independently without affecting the others. Furthermore, using a vacuum valve housing 1 effectively reduces liquid cooling loss, improves economic efficiency, and facilitates valve maintenance and replacement without additional maintenance costs. The vacuum valve housing 1 is also small in size and compact in layout, requiring minimal installation space and effectively improving the space utilization of the liquefied natural gas dispenser.

[0029] Example 2: Figure 1-4 As shown, a vacuum valve box is provided, which also includes a natural gas pipe 2: the natural gas pipe 2 is provided in three sets, and each set of natural gas pipe 2 passes through the first chamber 12, the second chamber 13 and the third chamber 14 in sequence. The natural gas pipe 2 is used to transport natural gas.

[0030] It should be noted that the design temperature inside natural gas pipeline 2 is ≤-196℃; the ambient temperature is -40℃ to +50℃; the design pressure is 1.6MPa, 2.5MPa, and 4.0MPa; the leakage rate of the first chamber 12, the second chamber 13, and the third chamber 14 is ≤1×10-10Pa·M3 / s; the venting rate of the first chamber 12, the second chamber 13, and the third chamber 14 is ≤1×10-10Pa·M3 / s; the vacuum degree at room temperature is ≤5×10-2Pa; and the vacuum degree at liquid nitrogen temperature is ≤5×10-3Pa.

[0031] Control valves 3 are connected to the first sealing plate 4, the second sealing plate 5 and the third sealing plate 6. The control valves 3 extend into the first chamber 12, the second chamber 13 and the first sealing plate 4 and are connected to the control valves 3. The control valves 3 are used to control the transportation status of natural gas in the natural gas pipe 2.

[0032] The effect achieved by the entire second embodiment is that natural gas is transported through natural gas pipe 2, and at this time, control valve 3 controls the transport status of natural gas in natural gas pipe 2.

[0033] Working principle: When using this vacuum valve box, natural gas is first transported through natural gas pipe 2. At this time, control valve 3 will control the transport status of natural gas in natural gas pipe 2.

[0034] Secondly, the first chamber 12, the second chamber 13, and the third chamber 14 are located within the vacuum valve housing 1 as follows: Figure 3 The chambers are arranged sequentially as shown, separated by partitions integrally formed with the vacuum valve housing 1. The first chamber 12, second chamber 13, and third chamber 14 are sealed by the first sealing plate 4, second sealing plate 5, and third sealing plate 6, respectively. This means that the first chamber 12, second chamber 13, and third chamber 14 are independent chambers. In the event of a leak or other malfunction in the natural gas pipe 2 within a single chamber, each chamber can be operated independently without affecting the others. Furthermore, the use of a vacuum valve housing 1 effectively reduces liquid cooling loss, improving economic efficiency. Valve maintenance and replacement are convenient with no additional maintenance costs. The vacuum valve housing 1 is also small in size and compact in layout, requiring minimal installation space and effectively improving the space utilization of the liquefied natural gas dispenser. Ultimately, this completes the function of the vacuum valve housing.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vacuum valve box, characterized in that, The device includes a vacuum valve housing, which contains a first chamber, a second chamber, and a third chamber. The first chamber is located on one side of the second chamber, and the third chamber is located on the side of the second chamber away from the first chamber. The vacuum valve housing is provided with three vacuum tubes, which are respectively connected to the first chamber, the second chamber, and the third chamber.

2. A vacuum valve box according to claim 1, characterized in that: The vacuum valve box also includes: The natural gas pipeline is provided in three sets, with each set of natural gas pipelines passing through the first chamber, the second chamber and the third chamber in sequence.

3. A vacuum valve box according to claim 1, characterized in that: The vacuum valve housing is provided with a sealing plate assembly, which seals the vacuum valve housing.

4. A vacuum valve box according to claim 3, wherein: The sealing plate assembly includes a first sealing plate connected to the third chamber, the four sides of the first sealing plate being longer than the four sides of the third chamber.

5. A vacuum valve box according to claim 4, characterised in that: A second sealing plate is connected to the second chamber, and the side of the second sealing plate near the first sealing plate abuts against the side of the first sealing plate.

6. A vacuum valve box according to claim 5, characterised in that: A third sealing plate is connected to the first chamber, and the third sealing plate is located on one side of the second sealing plate and abuts against the side edge of the second sealing plate.

7. A vacuum valve box according to claim 6, characterised in that: A control valve is connected to each of the first sealing plate, the second sealing plate, and the third sealing plate. The control valve extends into the first chamber, the second chamber, and the first sealing plate and is connected to the control valve.

8. A vacuum valve box according to claim 7, characterized in that: The first sealing plate is located below the third sealing plate and is designed as an inclined plate, which is consistent with the top inclined surface of the second chamber.

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