Roots vacuum pump gas-liquid separation device

Abstract

The utility model provides a roots vacuum pump gas -liquid separation device, including gas -liquid separation cylinder, the gas -liquid separation cylinder top is equipped with the cylinder cover, first liquid discharge valve is installed in the gas -liquid separation cylinder bottom, the tee pipe is installed in first liquid discharge valve lower extreme, second liquid discharge valve is installed in the tee pipe away from first liquid discharge valve one end, the cross -cylinder is adjacent to the tee pipe through the pipe joint and communicates, the cross -cylinder is installed with detachable end disc away from the tee pipe one end, the piston is slidably installed in the cross -cylinder, the piston one side middle part position is installed with threaded rod, the threaded rod away from the one end of piston penetrates end disc and threaded rod is connected with end disc screw thread, the handle rod is installed to the threaded rod away from the one end of piston, the utility model has the beneficial effect that does not need to stop the machine and carry out the liquid discharge operation.

Description

Technical Field

[0001] This utility model is a gas-liquid separation device for a Roots vacuum pump, belonging to the field of Roots vacuum pumps. Background Technology

[0002] When using a Roots vacuum pump to create a vacuum in a chemical processing unit, liquids or condensable gases are easily drawn in, causing liquid to accumulate at the bottom of the pump. When the accumulated liquid reaches a certain amount, flooding can occur within the pump, severely interfering with the normal operation of the Roots vacuum pump. While installing a gas-liquid separator at the inlet of the Roots vacuum pump can effectively separate liquids from the gas and drain the accumulated liquid by opening the bottom drain valve, a pressure difference exists between the separator and the gas line of the Roots vacuum pump. If liquid is drained directly while the system is running, this pressure difference can cause gas backflow or liquid ejection. Therefore, the Roots vacuum pump must be stopped first, and the system pressure must be balanced before draining. This operation not only interrupts the continuous operation of the vacuum system but also affects the stability of the chemical production process, increases the frequency of equipment start-ups and shutdowns, and consequently shortens the lifespan of the Roots vacuum pump and reduces production efficiency. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a Roots vacuum pump gas-liquid separation device to solve the problems mentioned in the background technology. This utility model does not require stopping the machine for liquid drainage.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a Roots vacuum pump gas-liquid separation device, comprising:

[0005] A gas-liquid separator cylinder has a cylinder cover installed on its top, and two symmetrically arranged connecting pipes are installed on the outer surface of the cylinder cover.

[0006] The first drain valve is installed at the bottom of the gas-liquid separator.

[0007] The three-way pipe is installed at the lower end of the first drain valve;

[0008] The second drain valve is installed at the end of the three-way pipe away from the first drain valve;

[0009] A horizontal cylinder is connected to a tee pipe via a pipe joint. A detachable end plate is installed at the end of the horizontal cylinder away from the tee pipe. A piston is slidably installed inside the horizontal cylinder. A threaded rod is installed at the middle of one side of the piston. The end of the threaded rod away from the piston passes through the end plate and is threadedly connected to the end plate. A handle rod is installed at the end of the threaded rod away from the piston.

[0010] Furthermore, a connecting ring is installed at one end of the cross cylinder near the end cover, and the end plate is connected to the connecting ring by fasteners formed by multiple sets of first screws and nuts.

[0011] Furthermore, the connecting ring has an arc-shaped ring on the side away from the end plate. The arc-shaped ring has multiple small holes equidistantly arranged on one side. Each of the multiple small holes is fitted with a first screw (34). A connecting plate is installed on the upper part of the outer surface of the arc-shaped ring. The end of the connecting plate away from the arc-shaped ring is connected to the gas-liquid separator cylinder by multiple second screws.

[0012] Furthermore, the connecting plate has a "Z" shaped structure, and the outer surface of the connecting ring is equipped with a protrusion that mates with the connecting plate. One end of the second screw passes through the connecting plate and is threadedly connected to the protrusion.

[0013] Furthermore, a circular hole is provided in the middle of one side of the end plate, and a threaded sleeve is provided on the outside of the circular hole, which is concentrically arranged with the circular hole. One end of the threaded sleeve is connected and fixed to the end plate, and the threaded sleeve is sleeved on the threaded rod and threadedly connected to the threaded rod.

[0014] Furthermore, the threaded rod has a shaft hole at the end away from the piston, the handle rod passes through the shaft hole, and both ends of the handle rod are equipped with round heads, the ball diameter of which is larger than the inner diameter of the shaft hole.

[0015] Furthermore, a pressure gauge is provided between the two connecting pipes, and the pressure gauge is fixedly connected to the cylinder cover and communicates with the space formed by the gas-liquid separation cylinder and the cylinder cover.

[0016] Furthermore, a blind hole is formed in the middle of the side of the piston facing the threaded rod, and the end of the threaded rod away from the handle rod is installed in the blind hole.

[0017] The beneficial effects of this utility model are:

[0018] 1. The first drain valve at the bottom of the gas-liquid separator forms a passage with the three-way pipe and the second drain valve. The piston inside the horizontal cylinder is controlled by a threaded rod and a handle rod. During draining, the first drain valve is opened first, closing the second drain valve. There is no need to shut down the vacuum pump; simply rotate the handle rod to push the piston. The piston's movement isolates the pressure difference between the gas-liquid separator and the outside environment, allowing the liquid to enter the horizontal cylinder from the gas-liquid separator without interrupting the vacuum system. Then, the first drain valve is closed, and the second drain valve is opened, allowing the liquid to drain from the second drain valve. This solves the problem of traditional devices requiring shutdown and pressure relief, ensuring the continuity of the chemical production process and improving production efficiency. The piston's sliding motion can block the gas-liquid passage in the three-way pipe, preventing gas backflow or liquid jetting during draining and maintaining a stable pump vacuum.

[0019] 2. The arc-shaped ring, connecting ring and end plate are connected by fasteners formed by the first screw and nut, thereby completing the assembly of the end plate, connecting plate and cross cylinder. The second screw passes through the connecting plate and is threadedly connected to the protrusion. Thus, the gas-liquid separation cylinder and the connecting plate support the cross cylinder, reduce the load on the connection between the cross cylinder and the three-way pipe, and improve the stability of the structure. The protrusion locally increases the thickness of the part of the gas-liquid separation cylinder where the second screw is installed. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a Roots vacuum pump gas-liquid separation device according to the present invention;

[0022] Figure 2 This is another perspective view of the gas-liquid separation device of the Roots vacuum pump according to the present invention;

[0023] Figure 3 This is a plan view of a Roots vacuum pump gas-liquid separation device according to the present invention;

[0024] Figure 4 for Figure 3 Partial sectional view of AA;

[0025] In the picture:

[0026] 1. Gas-liquid separator cylinder; 11. Cylinder cover; 12. Connecting pipe; 13. Pressure gauge; 14. Protrusion;

[0027] 2. Connecting plate; 21. Second screw; 22. Arc ring;

[0028] 3. Horizontal cylinder; 31. End plate; 32. Handle rod; 33. Threaded rod; 34. First screw; 35. Threaded sleeve; 36. Connecting ring; 37. Nut; 38. Piston;

[0029] 4. The first drain valve;

[0030] 5. T-joint;

[0031] 6. Second drain valve. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0033] Please see Figure 1 , Figure 2 and Figure 4This utility model provides a technical solution: a Roots vacuum pump gas-liquid separation device, including a gas-liquid separation cylinder 1, a cylinder cover 11 installed on the top of the gas-liquid separation cylinder 1, two symmetrically arranged connecting pipes 12 installed on the outer surface of the cylinder cover 11, a pressure gauge 13 provided between the two connecting pipes 12, the pressure gauge 13 is connected and fixed to the cylinder cover 11 and the space formed by the pressure gauge 13 and the gas-liquid separation cylinder 1 and the cylinder cover 11 is in communication, the pressure gauge 13 on the cylinder cover 11 displays the pressure inside the gas-liquid separation cylinder 1 in real time, which makes it easy for the operator to grasp the system status.

[0034] See Figures 1-4 The first drain valve 4 is installed at the bottom of the gas-liquid separator 1, and the three-way pipe 5 is installed at the lower end of the first drain valve 4. The second drain valve 6 is installed at the end of the three-way pipe 5 away from the first drain valve 4. The horizontal cylinder 3 is connected to the three-way pipe 5 via a pipe joint. A detachable end plate 31 is installed at the end of the horizontal cylinder 3 away from the three-way pipe 5. A piston 38 is slidably installed inside the horizontal cylinder 3. A threaded rod 33 is installed at the middle of one side of the piston 38. A blind hole is formed by a recess at the middle of the side of the piston 38 facing the threaded rod 33, so that the end of the threaded rod 33 away from the handle rod 32 is installed in the blind hole, which improves the stability of the connection between the threaded rod 33 and the piston 38. The end of the threaded rod 33 away from the piston 38 passes through the end plate 31 and the threaded rod 33... The end plate 31 is threadedly connected to the end plate 31. A circular hole is opened in the middle of one side of the end plate 31. A threaded sleeve 35 is arranged concentrically with the circular hole on the outside of the circular hole. One end of the threaded sleeve 35 is connected and fixed to the end plate 31. The threaded sleeve 35 is fitted on the threaded rod 33 and threadedly connected to the threaded rod 33. A handle rod 32 is installed at the end of the threaded rod 33 away from the piston 38. A shaft hole is opened at the end of the threaded rod 33 away from the piston 38. The handle rod 32 passes through the shaft hole. Both ends of the handle rod 32 are equipped with round heads. The ball diameter of the round head is larger than the inner diameter of the shaft hole. The first drain valve 4 at the bottom of the gas-liquid separator 1 forms a passage with the three-way pipe 5 and the second drain valve 6. The piston 38 in the horizontal cylinder 3 is controlled by the threaded rod 33 and the handle rod 32. When draining liquid, first open the first drain valve 4 to close the second drain valve 6. There is no need to shut down the vacuum pump. Simply rotate the handle rod 32 to push the piston 38. The movement of the piston 38 isolates the pressure difference between the gas-liquid separation cylinder 1 and the outside world, allowing the liquid to enter the horizontal cylinder 3 from the gas-liquid separation cylinder 1 without interrupting the vacuum system. Then, close the first drain valve 4 and open the second drain valve 6, so that the liquid is discharged from the second drain valve 6. This solves the problem of needing to stop and depressurize in traditional equipment, ensuring the continuity of the chemical production process and improving production efficiency. When the piston 38 slides, it can block the gas-liquid passage in the three-way pipe 5, preventing gas backflow or liquid jet during draining and maintaining the stability of the pump body vacuum.

[0035] See Figures 1-4A connecting ring 36 is installed at one end of the horizontal cylinder 3 near the end cover. The end plate 31 is connected to the connecting ring 36 by fasteners formed by multiple sets of first screws 34 and nuts 37. An arc-shaped ring 22 is provided on the side of the connecting ring 36 away from the end plate 31. Multiple small holes are equidistantly arranged on one side of the arc-shaped ring 22, and first screws 34 are inserted into each of the multiple small holes. A connecting plate 2 is installed at the upper part of the outer surface of the arc-shaped ring 22. The end of the connecting plate 2 away from the arc-shaped ring 22 is connected to the gas-liquid separator 1 by multiple second screws 21. The connecting plate 2 has a "Z" shaped structure. The outer surface of the connecting ring 36 is equipped with fasteners that connect to the connecting plate. The second screw 21, which is paired with the protrusion 14, passes through the connecting plate 2 and is threadedly connected to the protrusion 14. The arc ring 22, the connecting ring 36 and the end plate 31 are connected by fasteners formed by the first screw 34 and the nut 37, thereby completing the assembly of the end plate 31, the connecting plate 2 and the horizontal cylinder 3. The second screw 21 passes through the connecting plate 2 and is threadedly connected to the protrusion 14. Thus, the gas-liquid separation cylinder 1 and the connecting plate 2 support the horizontal cylinder 3, reduce the load on the connection part between the horizontal cylinder 3 and the three-way pipe 5, and improve the stability of the structure. The protrusion 14 locally increases the thickness of the part of the gas-liquid separation cylinder 1 where the second screw 21 is installed.

[0036] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A Roots vacuum pump gas-liquid separation device, characterized by include: A gas-liquid separator (1) is provided with a cover (11) on its top, and two symmetrically arranged connecting pipes (12) are installed on the outer surface of the cover (11). The first drain valve (4) is installed at the bottom of the gas-liquid separator (1); The three-way pipe (5) is installed at the lower end of the first drain valve (4); The second drain valve (6) is installed at the end of the three-way pipe (5) away from the first drain valve (4); A horizontal cylinder (3) is connected to a three-way pipe (5) via a pipe joint. A detachable end plate (31) is installed at the end of the horizontal cylinder (3) away from the three-way pipe (5). A piston (38) is slidably installed inside the horizontal cylinder (3). A threaded rod (33) is installed at the middle of one side of the piston (38). The end of the threaded rod (33) away from the piston (38) passes through the end plate (31) and is threadedly connected to the end plate (31). A handle rod (32) is installed at the end of the threaded rod (33) away from the piston (38).

2. A Roots vacuum pump gas-liquid separation device according to claim 1, characterized in that: A connecting ring (36) is installed at one end of the cross cylinder (3) near the end cover. The end plate (31) is connected to the connecting ring (36) by fasteners formed by multiple sets of first screws (34) and nuts (37).

3. A Roots vacuum pump gas-liquid separation device according to claim 2, characterized in that: The connecting ring (36) has an arc-shaped ring (22) on the side away from the end plate (31). The arc-shaped ring (22) has multiple small holes equidistantly arranged on one side. Each of the multiple small holes is fitted with a first screw (34). A connecting plate (2) is installed on the upper part of the outer surface of the arc-shaped ring (22). The end of the connecting plate (2) away from the arc-shaped ring (22) is connected to the gas-liquid separator (1) through multiple second screws (21).

4. A Roots vacuum pump gas-liquid separation device according to claim 3, characterized in that: The connecting plate (2) has a "Z" shaped structure. The outer surface of the connecting ring (36) is fitted with a protrusion (14) that cooperates with the connecting plate (2). One end of the second screw (21) passes through the connecting plate (2) and is threadedly connected to the protrusion (14).

5. A Roots vacuum pump gas-liquid separation device according to claim 1, characterized in that: A circular hole is provided in the middle of one side of the end plate (31), and a threaded sleeve (35) is provided on the outside of the circular hole and arranged concentrically with the circular hole. One end of the threaded sleeve (35) is connected and fixed to the end plate (31), and the threaded sleeve (35) is sleeved on the threaded rod (33) and threadedly connected to the threaded rod (33).

6. A Roots vacuum pump gas-liquid separation device according to claim 1, characterized in that: The threaded rod (33) has a shaft hole at one end away from the piston (38), and the handle rod (32) passes through the shaft hole. Both ends of the handle rod (32) are equipped with round heads, and the ball diameter of the round head is larger than the inner diameter of the shaft hole.

7. A Roots vacuum pump gas-liquid separation device according to claim 1, characterized in that: A pressure gauge (13) is provided between the two connecting pipes (12). The pressure gauge (13) is fixedly connected to the cylinder cover (11), and the space formed by the pressure gauge (13), the gas-liquid separation cylinder (1), and the cylinder cover (11) is in communication.

8. A Roots vacuum pump gas-liquid separation device according to claim 1, characterized in that: The piston (38) has a blind hole recessed in the middle of the side facing the threaded rod (33), and the end of the threaded rod (33) away from the handle rod (32) is installed in the blind hole.

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