A regulating device for regulating the pressure of a liquefied natural gas tank

Abstract

The utility model relates to hydraulic natural gas equipment technical field discloses a kind of adjusting device for adjusting liquefied natural gas storage tank pressure, valve body, the two ports of the valve body are respectively communicated with air inlet pipe, air outlet pipe, the valve body inside is provided with valve seat, valve plate, the top of the valve plate is fixedly installed with valve stem, the valve stem is stretched out from valve body, the top of the valve body is fixedly installed with base, the top of the base is fixedly installed with guide rod, when servo motor is powered off or damaged, can pull the mounting seat to move, drive servo motor and rotating shaft one to move, so that transmission friction ring two and transmission friction ring one contact, and transmission friction ring three and transmission friction ring one separate, rotating rotating shaft one drives transmission friction ring two to rotate at this time, and then drive transmission friction ring one to rotate, can directly avoid the problem that transmission friction ring three cannot rotate caused by servo motor locking.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic natural gas equipment technology, specifically a regulating device for adjusting the pressure of liquefied natural gas storage tanks. Background Technology

[0002] Liquefied Natural Gas (LNG) is natural gas that has been compressed and cooled to its boiling point, turning it into a liquid. Its main component is methane, and it is widely recognized as the cleanest fossil fuel on Earth. It is colorless, odorless, non-toxic, and non-corrosive. LNG storage tanks are specialized products for storing LNG, serving to stabilize system pressure. Based on the pressure they can withstand, they can be classified as high-pressure tanks, low-pressure tanks, and atmospheric pressure tanks. Based on the material, they can be classified as carbon steel tanks, low-alloy steel tanks, and stainless steel tanks. During the delivery of LNG to users, the pressure and flow rate need to be regulated. Therefore, regulating devices need to be installed on the tank. Common regulating devices include manual and automatic regulation. Automatic regulation often uses a servo motor as the drive source. However, when the equipment is powered off, the servo motor locks itself, and the resistance to manual rotation is very high, causing the automatic regulation structure to lock and making it impossible to manually adjust the set pressure. Utility Model Content

[0003] The purpose of this invention is to provide a regulating device for adjusting the pressure of liquefied natural gas storage tanks, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a regulating device for adjusting the pressure of a liquefied natural gas storage tank, comprising a valve body, with an inlet pipe and an outlet pipe respectively connected to two ports of the valve body; a valve seat and a valve plate are provided inside the valve body; a valve stem is fixedly installed on the top of the valve plate, extending from the valve body; a base is fixedly installed on the top of the valve body; a guide rod is fixedly installed on the top of the base; a top seat is fixedly installed on the top of the guide rod; a connecting plate one and a connecting plate two are slidably sleeved on the guide rod; the connecting plate one and the connecting plate two are elastically connected by a pressure regulating spring; an up-and-down adjusting assembly is provided on the top of the top seat, and the adjusting end of the up-and-down adjusting assembly is fixedly connected to the connecting plate two.

[0005] Furthermore, the up-and-down adjustment assembly includes a threaded rod and a mounting base. A servo motor is fixedly mounted on the top of the mounting base. The threaded rod is rotatably connected to the top base via a bearing. An internal threaded sleeve is threaded onto the outer wall of the threaded rod. The internal threaded sleeve is fixedly connected to the connecting plate two. A rotating shaft two is fixedly mounted on the output end of the mounting base. A transmission friction ring three is fixedly mounted on the outer wall of the rotating shaft two. A transmission friction ring one is fixedly mounted on the outer wall of the threaded rod. The mounting base is rotatably connected to the rotating shaft one via a bearing. A transmission friction ring two is fixedly mounted on the outer wall of the rotating shaft one. The transmission friction ring one, transmission friction ring two, and transmission friction ring three have the same specifications.

[0006] Furthermore, a guide seat is sleeved on the outside of the first transmission friction ring, the second transmission friction ring, and the third transmission friction ring. The guide seat is fixedly installed on the top of the top seat, and a fixing plate is fixedly installed on the bottom of the mounting seat. The fixing plate is connected to the guide seat by fixing bolts.

[0007] Furthermore, a distance sensor is fixedly installed at the bottom of the top seat, and a shielding ring is fixedly installed at the bottom of the top seat. The distance sensor is located inside the shielding ring, and the lower surface of the shielding ring is flush with the bottom of the distance sensor.

[0008] Furthermore, a scale plate is fixedly installed at the bottom of the top seat. The scale plate has graduations on its front side, and the graduations on the scale plate display the spring force value of the pressure regulating spring.

[0009] Furthermore, a turntable is fixedly installed at the top of the rotating shaft, and a handle is fixedly installed at the top of the turntable.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. When the servo motor is powered off or damaged, the mounting base can be pulled to move, causing the servo motor and shaft one to move, so that transmission friction ring two contacts transmission friction ring one, and transmission friction ring three separates from transmission friction ring one. At this time, the rotating shaft one drives transmission friction ring two to rotate, which in turn drives transmission friction ring one to rotate, which can directly avoid the problem of transmission friction ring three being unable to rotate due to servo motor lock-up. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model when connected to a liquefied natural gas storage tank;

[0013] Figure 2 This is a schematic diagram of the structure of this utility model;

[0014] Figure 3 This utility model Figure 2 A structural schematic diagram of the front sectional view;

[0015] Figure 4 This is a front sectional view of the guide seat and mounting seat of this utility model, as well as a structural schematic diagram of the up-and-down adjustment assembly.

[0016] In the diagram: 1. Valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Valve seat; 5. Valve plate; 6. Valve stem; 7. Base; 8. Top seat; 9. Guide rod; 10. Connecting plate one; 11. Pressure adjusting spring; 12. Connecting plate two; 13. Up and down adjusting assembly; 1301. Internal threaded sleeve; 1302. Threaded rod; 1303. Transmission friction ring one; 1304. Transmission friction ring two; 1305. Rotating shaft one; 1306. Servo motor; 1307. Rotating shaft two; 1308. Transmission friction ring three; 1309. Mounting base; 14. Guide seat; 15. Fixing plate; 16. Fixing bolt; 17. Turntable; 18. Handle; 19. Distance sensor; 20. Shielding ring; 21. Scale plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Please see Figures 1-4 This utility model provides a technical solution: a regulating device for adjusting the pressure of a liquefied natural gas storage tank, comprising a valve body 1, with an inlet pipe 2 and an outlet pipe 3 respectively connected to two ports of the valve body 1; a valve seat 4 and a valve plate 5 are provided inside the valve body 1; a valve stem 6 is fixedly installed on the top of the valve plate 5, extending from the valve body 1; a base 7 is fixedly installed on the top of the valve body 1; a guide rod 9 is fixedly installed on the top of the base 7; a top seat 8 is fixedly installed on the top of the guide rod 9; a connecting plate 10 and a connecting plate 2 12 are slidably sleeved on the guide rod 9; and pressure is applied between the connecting plate 10 and the connecting plate 2 12. The adjusting spring 11 is elastically connected, and the top of the top seat 8 is provided with an up-and-down adjusting component 13. The adjusting end of the up-and-down adjusting component 13 is fixedly connected to the connecting plate 2 12. The height of the connecting plate 2 12 is adjusted by adjusting the up-and-down adjusting component 13, thereby adjusting the distance between the connecting plate 2 12 and the connecting plate 10, so that the compression length of the pressure adjusting spring 11 is changed, thereby changing the elastic force on the pressure adjusting spring 11, and then changing the downward pressure on the valve stem 6 and the valve plate 5. Only when the pressure inside the tank is greater than this pressure value can the natural gas push up the valve plate 5 and then be discharged from the gas outlet pipe 3, thus achieving the functions of pressure relief and pressure stabilization.

[0019] The up-down adjustment assembly 13 includes a threaded rod 1302 and a mounting base 1309. A servo motor 1306 is fixedly mounted on the top of the mounting base 1309. The threaded rod 1302 is rotatably connected to the top seat 8 via a bearing. An inner threaded sleeve 1301 is threaded onto the outer wall of the threaded rod 1302. The inner threaded sleeve 1301 is fixedly connected to the connecting plate 12. A rotating shaft 1307 is fixedly mounted on the output end of the mounting base 1309. A transmission friction ring 1308 is fixedly mounted on the outer wall of the rotating shaft 1307. A transmission friction ring 1303 is fixedly mounted on the outer wall of the threaded rod 1302. A rotating shaft 1305 is rotatably connected to the mounting base 1309 via a bearing. A transmission friction ring 1304 is fixedly mounted on the outer wall of the rotating shaft 1305. The transmission friction rings 1303, 1304, and 1308 are of the same specifications. When the servo motor 1306 is normally powered, the transmission friction ring 1308... The transmission friction ring 1303 is in contact with the first transmission friction ring 1303. The servo motor 1306 drives the second shaft 1307 to rotate, which in turn drives the third transmission friction ring 1308 to rotate. The friction between the third transmission friction ring 1308 and the first transmission friction ring 1303 will drive the threaded rod 1302 to rotate, causing the inner threaded sleeve 1301 to move, thereby adjusting the height of the second connecting plate 12. When the servo motor 1306 is de-energized or damaged, the mounting base 1309 can be pulled to move, driving the servo motor 1306 and the first shaft 1305 to move, so that the second transmission friction ring 1304 contacts the first transmission friction ring 1303, and the third transmission friction ring 1308 separates from the first transmission friction ring 1303. At this time, the rotating shaft 1305 drives the second transmission friction ring 1304 to rotate, which in turn drives the first transmission friction ring 1303 to rotate. This can directly avoid the problem that the third transmission friction ring 1308 cannot rotate due to the servo motor 1306 locking.

[0020] Guide seats 14 are fitted around the outer surfaces of transmission friction ring 1303, transmission friction ring 1304, and transmission friction ring 1308. Guide seats 14 are fixedly installed on the top of the top seat 8. A fixing plate 15 is fixedly installed on the bottom of the mounting seat 1309. The fixing plate 15 is connected to the guide seats 14 by fixing bolts 16. The guide seats 14 and fixing plates 15 are used to fix the mounting seat 1309. After switching between manual and automatic operation, the fixing bolts 16 are used to fix it to prevent transmission friction ring 1304 or transmission friction ring 1308 from separating from transmission friction ring 1303 during rotation.

[0021] A distance sensor 19 is fixedly installed at the bottom of the top seat 8, and a shielding ring 20 is also fixedly installed at the bottom of the top seat 8. The distance sensor 19 is located inside the shielding ring 20, and the lower surface of the shielding ring 20 is flush with the bottom of the distance sensor 19. The distance sensor 19 monitors the height of the connecting plate 12, thereby determining the compression length of the pressure regulating spring 11, and then calculating the magnitude of the downward pressure on the valve plate 5. In conjunction with the servo motor 1306, the function of automatically adjusting the pressure value is realized. The shielding ring 20 is set to protect the distance sensor 19 and prevent the connecting plate 12 from moving upward and squeezing the distance sensor 19.

[0022] A scale plate 21 is fixedly installed at the bottom of the top seat 8. The scale plate 21 has a scale on its front side, and the scale on the scale plate 21 displays the spring force value of the pressure regulating spring 11. The scale plate 21 is set so that the worker can observe the change value of the pressure value when manually adjusting.

[0023] A turntable 17 is fixedly installed at the top of the rotating shaft 1305, and a handle 18 is fixedly installed at the top of the turntable 17. The handle 18 and the turntable 17 make it easier to rotate the rotating shaft 1305.

[0024] Working principle: During use, when the servo motor 1306 is normally powered, the transmission friction ring 1308 (third) contacts the transmission friction ring 1303 (first). Turning on the servo motor 1306 drives the rotating shaft 1307 to rotate, which in turn drives the transmission friction ring 1308 to rotate. The friction between the rotating transmission friction ring 1308 and the transmission friction ring 1303 drives the threaded rod 1302 to rotate, causing the inner threaded sleeve 1301 to move. This adjusts the height of the connecting plate 12 (second) up and down. The change in the height of the connecting plate 12 changes the compression length of the pressure regulating spring 11, thus changing the elastic force on the pressure regulating spring 11. This, in turn, changes the downward pressure on the valve stem 6 and valve plate 5. Only when the pressure inside the tank exceeds this pressure value can the natural gas push up the valve plate 5 and then flow out from the outlet. The air tube 3 discharges, achieving the functions of pressure relief and stabilization. When manual adjustment is required, remove the fixing bolts 16 connecting the guide seat 14 and the fixing plate 15, and then pull the mounting seat 1309 to separate the transmission friction ring 1308 from the transmission friction ring 1303, and make the transmission friction ring 1304 contact the transmission friction ring 1303. Then tighten the fixing bolts 16 to fix the guide seat 14 and the fixing plate 15. Then, shake the handle 18 to drive the turntable 17 to rotate, which in turn drives the shaft 1305 to rotate. The rotating shaft 1305 drives the transmission friction ring 1304 to rotate, which in turn drives the transmission friction ring 1303 to rotate, and then drives the threaded rod 1302 to rotate, causing the inner threaded sleeve 1301 to move, thus adjusting the height of the connecting plate 12.

[0025] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A regulating device for regulating the pressure of a liquefied natural gas storage tank, comprising a valve body (1), wherein two ports of the valve body (1) are respectively connected to an inlet pipe (2) and an outlet pipe (3), characterized in that: The valve body (1) is provided with a valve seat (4) and a valve plate (5) inside. A valve stem (6) is fixedly installed on the top of the valve plate (5). The valve stem (6) extends out from the valve body (1). A base (7) is fixedly installed on the top of the valve body (1). A guide rod (9) is fixedly installed on the top of the base (7). A top seat (8) is fixedly installed on the top of the guide rod (9). A connecting plate one (10) and a connecting plate two (12) are slidably sleeved on the guide rod (9). The connecting plate one (10) and the connecting plate two (12) are elastically connected by a pressure adjusting spring (11). A vertical adjustment component (13) is provided on the top of the top seat (8). The adjusting end of the vertical adjustment component (13) is fixedly connected to the connecting plate two (12).

2. The regulating device for regulating the pressure of a liquefied natural gas storage tank according to claim 1, characterized in that: The up-down adjustment assembly (13) includes a threaded rod (1302) and a mounting base (1309). A servo motor (1306) is fixedly mounted on the top of the mounting base (1309). The threaded rod (1302) is rotatably connected to the top seat (8) via a bearing. An inner threaded sleeve (1301) is threaded onto the outer wall of the threaded rod (1302). The inner threaded sleeve (1301) is fixedly connected to the connecting plate (12). A rotating shaft (1307) is fixedly mounted on the output end of the mounting base (1309). The outer wall of the rotating shaft 2 (1307) is fixedly installed with a transmission friction ring 3 (1308), the outer wall of the threaded rod (1302) is fixedly installed with a transmission friction ring 1 (1303), the mounting base (1309) is rotatably connected to the rotating shaft 1 (1305) through a bearing, the outer wall of the rotating shaft 1 (1305) is fixedly installed with a transmission friction ring 2 (1304), and the transmission friction ring 1 (1303), transmission friction ring 2 (1304) and transmission friction ring 3 (1308) have the same specifications.

3. A regulating device for regulating the pressure of a liquefied natural gas storage tank according to claim 2, characterized in that: The transmission friction ring one (1303), transmission friction ring two (1304), and transmission friction ring three (1308) are fitted with guide seats (14), the guide seats (14) are fixedly installed on the top of the top seat (8), and the bottom of the mounting seat (1309) is fixedly installed with a fixing plate (15), the fixing plate (15) is connected to the guide seats (14) by fixing bolts (16).

4. A regulating device for regulating the pressure of a liquefied natural gas storage tank according to claim 1, characterized in that: A distance sensor (19) is fixedly installed at the bottom of the top seat (8), and a shielding ring (20) is fixedly installed at the bottom of the top seat (8). The distance sensor (19) is located inside the shielding ring (20), and the lower surface of the shielding ring (20) is flush with the bottom of the distance sensor (19).

5. A regulating device for regulating the pressure of a liquefied natural gas storage tank according to claim 1, characterized in that: A scale plate (21) is fixedly installed at the bottom of the top seat (8). The scale plate (21) has a scale on its front side, and the scale on the scale plate (21) displays the spring force value of the pressure regulating spring (11).

6. A regulating device for regulating the pressure of a liquefied natural gas storage tank according to claim 2, characterized in that: A turntable (17) is fixedly installed at the top of the first rotating shaft (1305), and a handle (18) is fixedly installed at the top of the turntable (17).

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