Anti-corrosion horizontal screw vacuum pump

Abstract

The invention discloses an anti-corrosion horizontal screw vacuum pump, and relates to the technical field of horizontal screw vacuum pumps, the anti-corrosion horizontal screw vacuum pump comprises a worm vacuum pump body, and further comprises a gas-liquid separation mechanism which is installed on the worm vacuum pump body and enables gas to enter the worm vacuum pump body to be subjected to gas-liquid separation; the driving mechanism is mounted on the gas-liquid separation mechanism and used for driving the lubricating mechanism to extrude out the lubricating oil in the oil tank; and the lubricating mechanism is arranged above the worm vacuum pump body and is used for adding lubricating oil to the worm vacuum pump body, so that the worm vacuum pump body is prevented from being oxidized and corroded. According to the worm vacuum pump, vaporous water in airflow can be rapidly cooled and solidified into water drops by reducing the temperature in the connecting pipe, the contact area and the collision opportunity of the airflow and the surface of the baffle plate are increased through the arrangement of the baffle plate, then the separation efficiency of the liquid drops is improved, and the problem that the water drops enter the worm vacuum pump body is avoided; only the risk that the driving screw and the driven screw are damaged due to liquid water corrosion is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of horizontal screw vacuum pumps, in particular to an anti-corrosion horizontal screw vacuum pump. Background Art

[0002] Screw vacuum pump is a vacuum equipment that uses a pair of screws to rotate synchronously at high speed in opposite directions in the pump casing to produce suction and exhaust effects; screw vacuum pump can extract gases containing a large amount of water vapor and a small amount of dust, so it is widely used in pharmaceutical, chemical, semiconductor, food and other corporate fields that have high requirements for clean vacuum.

[0003] The screw vacuum pump with the publication number CN114718867A provides a screw vacuum pump, which belongs to the field of vacuum pump technology. It solves the problem of high energy consumption of the existing screw vacuum pump. The screw vacuum pump includes a cylindrical variable pitch screw, and the outer side of the variable pitch screw has a spiral groove. The spiral grooves from one end to the other end of the variable pitch screw are respectively called the first spiral segment, the second spiral segment, the third spiral segment, the fourth spiral segment and the fifth spiral segment; the number of spiral turns of the first spiral segment and the fifth spiral segment are 0.9 to 1.1 turns, and the number of spiral turns of the second spiral segment, the third spiral segment and the fourth spiral segment is 1 turn; the pitch of the second spiral segment is the longest, and the pitch decreases from the second spiral segment to the fifth spiral segment. By reducing the pitch of the first spiral segment and increasing the pitch of the second spiral segment, the volume of the invalid sealing ring is reduced, the volume of the effective sealing ring is increased, and the air extraction rate in the medium and high pressure working stage is increased and the energy consumption is reduced.

[0004] However, during the use of the above-mentioned screw vacuum pump, untreated airflow enters the interior of the vacuum pump, which will cause the screw inside the vacuum pump to be easily corroded. Moreover, due to the long-term use of the screw vacuum pump, the meshing gears inside it will be oxidized and corroded. This requires frequent addition of lubricating oil to ensure smooth rotation on the one hand, and on the other hand, the lubricating oil can form an oil layer. However, the above-mentioned patent lacks the function of automatic refueling, which makes it very troublesome to add lubricating oil. In order to solve these problems, the present invention proposes a new type of corrosion-resistant horizontal screw vacuum pump. Summary of the invention

[0005] In order to solve the problems raised by the above background technology, the present invention proposes an anti-corrosion horizontal screw vacuum pump.

[0006] The purpose of the present invention can be achieved through the following technical solutions: An anti-corrosion horizontal screw vacuum pump, comprising a worm vacuum pump body, and also comprising The gas-liquid separation mechanism is installed on the worm vacuum pump body to separate the gas and liquid that are about to enter the worm vacuum pump body; The driving mechanism is installed on the gas-liquid separation mechanism and is used to drive the lubricating mechanism to squeeze out the lubricating oil inside the oil tank; The lubrication mechanism is arranged above the worm vacuum pump body to add lubricating oil to the worm vacuum pump body to avoid oxidation corrosion.

[0007] As a further preferred embodiment of the present technical solution: the gas-liquid separation mechanism includes a connecting pipe, a connecting shell is arranged on the outer wall of the connecting pipe, a condenser for cooling the gas inside the connecting pipe is arranged on the inner side of the connecting shell, and a plurality of baffles arranged in an offset manner and used to block liquid water are arranged inside the connecting pipe.

[0008] As a further preferred embodiment of the present technical solution: the lower end of the condenser is connected with a water outlet pipe, a one-way valve is arranged on the water outlet pipe, the lower end of the one-way valve is connected with a water storage tank, a drain pipe is arranged on the water storage tank, and a valve is arranged on the drain pipe.

[0009] As a further preferred embodiment of the present technical solution: the driving mechanism includes a No. 1 fixed block fixedly connected to the inside of the connecting pipe, the No. 1 fixed block is rotatably connected to a rotating shaft, the rotating shaft is provided with turbine blades, and the rotating shaft is provided with two sets of transmission components for steering.

[0010] As a further preferred embodiment of the present technical solution: the lubrication mechanism includes a transmission shaft and a No. 3 fixed block, the transmission shaft is connected to the rotating shaft through a transmission assembly, a No. 1 connecting rod is fixedly connected to the transmission shaft, a slider is rotatably connected to the No. 1 connecting rod, and the No. 3 fixed block is rotatably connected to a rotating rod, a No. 1 slide groove is provided on the rotating rod, the slider is slidably connected to the inside of the No. 1 slide groove, the end of the rotating rod away from the No. 3 fixed block is rotatably connected to a sliding rod, and the lower end of the sliding rod is fixedly connected to a piston.

[0011] As a further preferred embodiment of the present technical solution: the worm vacuum pump body includes a driving motor and a pump casing, the output end of the driving motor is fixedly connected to a driving screw, a driving gear is provided on the driving screw, the driving gear is meshingly connected to a driven gear, the driven gear is fixedly connected to a driven screw, the pump casing is provided with an inlet end, an outlet end and a gear groove, the driving gear and the driven gear are arranged on the inner side of the gear groove.

[0012] As a further preferred embodiment of the present technical solution: an oil tank is fixedly connected to the pump housing, an oil inlet pipe, an oil outlet pipe and an oil outlet channel are provided on the oil tank, the oil inlet pipe and the oil outlet pipe are both arranged through the gear groove, and the piston slides inside the oil outlet channel.

[0013] As a further preferred embodiment of the present technical solution: an activated carbon block for adsorbing impurities is arranged inside the connecting pipe, and a hydrophobic membrane for preventing liquid water from passing through is arranged on the activated carbon block.

[0014] As a further preferred embodiment of the present technical solution: the connecting pipe is fixedly connected to the pump housing, and the connecting pipe is through-connected to the inlet end.

[0015] As a further preferred embodiment of the technical solution: a No. 2 fixing block is fixedly connected to the upper end of the oil tank, and the transmission shaft is rotatably connected to the No. 2 fixing block.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by lowering the temperature inside the connecting pipe, the gaseous water in the airflow can be quickly cooled and solidified into water droplets. The provision of the baffle increases the contact area and collision chance between the airflow and the baffle surface, thereby improving the separation efficiency of the droplets, avoiding the problem of water droplets entering the interior of the worm vacuum pump body, and only reducing the risk of damage to the active screw and the driven screw due to liquid water corrosion.

[0017] 2. In the present invention, when the airflow passes through the connecting pipe, it can drive the turbine blades and rotate through the transmission assembly to realize the up and down sliding of the piston in the lubrication mechanism. Under the premise of forming a sealed pipeline between the oil tank, the oil inlet pipe, the gear groove and the oil outlet pipe, the lubricating oil is automatically transported to the driving gear and the driven gear for lubrication and corrosion prevention, and the excess lubricating oil flows back to the inside of the oil tank through the oil outlet pipe, thereby realizing the recycling of the lubricating oil.

[0018] 3. In the present invention, the activated carbon block and the hydrophobic membrane can effectively adsorb impurities in the airflow and intercept liquid water, thereby preventing the separated liquid water from entering the interior of the worm vacuum pump body due to the suction of the vacuum pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 The local structure of the present invention is cut away Figure 1 ; Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle; Figure 4 The local structure of the present invention is cut away Figure 2 ; Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle; Figure 6 It is a schematic diagram of a partial three-dimensional structure of the present invention; Figure 7 The local structure of the present invention is cut away Figure 3 .

[0020] Legend: 1. Support plate; 2. Bracket; 3. Worm vacuum pump body; 31. Driving motor; 32. Inlet end; 33. Outlet end; 34. Driving gear; 35. Driven gear; 36. Driving screw; 37. Driven screw; 38. Gear groove; 39. Pump housing; 4. Gas-liquid separation mechanism; 41. Connecting pipe; 42. Connecting housing; 43. Condenser; 44. Baffle; 45. Water outlet pipe; 46. One-way valve; 47. Water storage tank; 48. Drain pipe; 49. Valve ; 5. Activated carbon block; 51. Hydrophobic membrane; 6. Driving mechanism; 61. Fixed block No. 1; 62. Rotating shaft; 63. Turbine blade; 64. Transmission assembly; 65. Connecting shaft; 7. Lubricating mechanism; 71. Transmission shaft; 72. Fixed block No. 2; 73. Connecting rod No. 1; 74. Fixed block No. 3; 75. Rotating rod; 76. Slide groove No. 1; 77. Sliding block; 79. Sliding rod; 710. Piston; 8. Oil tank; 81. Oil inlet pipe; 82. Oil outlet pipe; 83. Oil outlet channel. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment 1: See also Figure 1-Figure 7 The present application provides an anti-corrosion horizontal screw vacuum pump, comprising a worm vacuum pump body 3, and also comprising a gas-liquid separation mechanism 4 installed on the worm vacuum pump body 3, so as to separate the gas that is about to enter the worm vacuum pump body 3 into gas and liquid; a driving mechanism 6 is installed on the gas-liquid separation mechanism 4, which is used to drive a lubricating mechanism 7 to squeeze out the lubricating oil in the oil tank 8; a lubricating mechanism 7 is arranged above the worm vacuum pump body 3, and lubricating oil is added to the worm vacuum pump body 3 to avoid oxidation corrosion; The gas-liquid separation mechanism 4 includes a connecting pipe 41, a connecting shell 42 is arranged on the outer wall of the connecting pipe 41, a condenser 43 for cooling the gas inside the connecting pipe 41 is arranged on the inner side of the connecting shell 42, and a plurality of baffles 44 arranged in a staggered manner and used to block liquid water are arranged inside the connecting pipe 41. The temperature inside the connecting pipe 41 is cooled and heat-exchanged by the condenser 43. When the worm vacuum pump body 3 is started to suck the airflow, the gaseous water in the airflow is cooled and solidified to form water droplets due to the low temperature inside the connecting pipe 41. The setting of the baffles 44 increases the contact area and collision chance between the airflow and the surface of the baffles 44, thereby improving the separation efficiency of the liquid droplets. The lower end of the condenser 43 is connected with a water outlet pipe 45, and a one-way valve 46 is provided on the water outlet pipe 45. The lower end of the one-way valve 46 is connected with a water tank 47, and a drain pipe 48 is provided on the water tank 47. A valve 49 is provided on the drain pipe 48. The connecting pipe 41 is fixedly connected to the pump casing 39, and the connecting pipe 41 is connected with the inlet end 32. The separated droplets slowly flow down from the baffle 44 and enter the interior of the water tank 47 through the water outlet pipe 45 for collection. The one-way valve 46 only allows water droplets to enter the interior of the water tank 47 to prevent water droplets from flowing back. When the water tank 47 is full, the water in the water tank 47 can be discharged from the drain pipe 48 by opening the valve 49.

[0023] In this embodiment, the worm vacuum pump body 3 includes a driving motor 31 and a pump casing 39, the output end of the driving motor 31 is fixedly connected to a driving screw 36, the driving screw 36 is provided with a driving gear 34, the driving gear 34 is meshingly connected to a driven gear 35, the driven gear 35 is fixedly connected to a driven screw 37, the pump casing 39 is provided with an inlet end 32, an outlet end 33 and a gear groove 38, the driving gear 34 and the driven gear 35 are arranged on the inner side of the gear groove 38.

[0024] This embodiment reduces the temperature inside the connecting pipe 41 so that the gaseous water in the airflow can be quickly cooled and solidified into water droplets. The provision of the baffle 44 increases the contact area and collision chance between the airflow and the surface of the baffle 44, thereby improving the separation efficiency of the droplets. A water storage tank 47 is provided at the bottom to collect the droplets, thereby avoiding the problem of water droplets entering the interior of the worm vacuum pump body 3, and only reducing the risk of damage to the active screw 36 and the driven screw 37 due to corrosion by liquid water.

[0025] Embodiment 2: On the basis of the first embodiment, the driving mechanism 6 includes a No. 1 fixed block 61 fixedly connected to the inside of the connecting pipe 41, the No. 1 fixed block 61 is rotatably connected to a rotating shaft 62, the rotating shaft 62 is provided with a turbine blade 63, and the rotating shaft 62 is provided with two sets of transmission components 64 for steering. When the airflow passes through the connecting pipe 41, it can drive the internal turbine blade 63 to rotate, the turbine blade 63 drives the rotating shaft 62 to rotate, and the rotating shaft 62 drives the two sets of transmission components 64 to rotate, each set of transmission components 64 includes two pulleys and a belt connecting the two pulleys for steering, and the worm vacuum pump body 3 is fixedly connected to a connecting shaft 65 for supporting the pulley, and the belt can rotate thereon; The lubrication mechanism 7 includes a transmission shaft 71 and a No. 3 fixed block 74. The transmission shaft 71 is connected to the rotating shaft 62 through a transmission assembly 64. A No. 1 connecting rod 73 is fixedly connected to the transmission shaft 71. A slider 77 is rotatably connected to the No. 1 connecting rod 73, and a rotating rod 75 is rotatably connected to the No. 3 fixed block 74. A No. 1 slide groove 76 is provided on the rotating rod 75. The slider 77 is slidably connected to the inside of the No. 1 slide groove 76. The end of the rotating rod 75 away from the No. 3 fixed block 74 is rotatably connected to a sliding rod 79. The lower end of the sliding rod 79 is fixedly connected to a piston 710. The pump housing 39 is fixedly connected to an oil tank 8. An oil inlet pipe 81, an oil outlet pipe 82 and an oil outlet channel 83 are provided on the oil tank 8. The oil inlet pipe 81 and the oil outlet pipe 82 are both arranged through the gear groove 38. The piston 710 slides inside the oil outlet channel 83. The upper end of the oil tank 8 is fixedly connected to the No. 2 fixed block 72. The shaft 71 is rotatably connected to the No. 2 fixed block 72. The above-mentioned driving mechanism 6 will drive the transmission shaft 71 to rotate, and the transmission shaft 71 drives the No. 1 connecting rod 73 to rotate. The rotation of the No. 1 connecting rod 73 causes the slider 77 to slide inside the No. 1 slide groove 76 on the rotating rod 75, and then the rotating rod 75 swings up and down around the No. 3 fixed block 74. The rotating rod 75 drives the sliding rod 79 to slide up and down, and the sliding rod 79 drives the piston 710 to slide inside the oil outlet channel 83. It should be noted that a sealed pipeline is formed between the oil tank 8, the oil inlet pipe 81, the gear groove 38 and the oil inlet pipe 81, and the lubrication inside the oil tank 8 enters the gear groove 38 through the oil inlet pipe 81 to lubricate and prevent rust of the driving gear 34 and the driven gear 35, and the excess lubricating oil flows back to the inside of the oil tank 8 through the oil outlet pipe 82, ensuring that the driving gear 34 and the driven gear 35 can be automatically lubricated.

[0026] Embodiment three: On the basis of Example 1, an activated carbon block 5 for adsorbing impurities is arranged inside the connecting pipe 41, and a hydrophobic membrane 51 for preventing liquid water from passing through is arranged on the activated carbon block 5. The activated carbon block 5 and the hydrophobic membrane 51 can effectively adsorb impurities in the airflow and intercept liquid water, thereby preventing the separated liquid water from entering the interior of the worm vacuum pump body 3 due to the suction force of the vacuum pump.

[0027] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A corrosion-resistant horizontal screw vacuum pump, comprising a worm vacuum pump body (3), characterized in that: Also includes The gas-liquid separation mechanism (4) is installed on the worm vacuum pump body (3) to separate the gas from the liquid that is about to enter the worm vacuum pump body (3); A driving mechanism (6) is mounted on the gas-liquid separation mechanism (4) and is used to drive the lubricating mechanism (7) to squeeze out the lubricating oil in the oil tank (8); The lubrication mechanism (7) is arranged above the worm vacuum pump body (3) and adds lubricating oil to the worm vacuum pump body (3) to prevent oxidation corrosion.

2. The anti-corrosion horizontal screw vacuum pump according to claim 1, characterized in that: The gas-liquid separation mechanism (4) comprises a connecting pipe (41), a connecting shell (42) is arranged on the outer wall of the connecting pipe (41), a condenser (43) for cooling the gas inside the connecting pipe (41) is arranged on the inner side of the connecting shell (42), and a plurality of baffles (44) arranged in a staggered manner and used to block liquid water are arranged inside the connecting pipe (41).

3. The anti-corrosion horizontal screw vacuum pump according to claim 2, characterized in that: The lower end of the condenser (43) is connected to a water outlet pipe (45), a one-way valve (46) is provided on the water outlet pipe (45), the lower end of the one-way valve (46) is connected to a water storage tank (47), a water discharge pipe (48) is provided on the water storage tank (47), and a valve (49) is provided on the water discharge pipe (48).

4. The anti-corrosion horizontal screw vacuum pump according to claim 1, characterized in that: The driving mechanism (6) comprises a first fixing block (61) fixedly connected to the inside of the connecting pipe (41), a rotating shaft (62) being rotatably connected to the first fixing block (61), a turbine blade (63) being arranged on the rotating shaft (62), and two sets of transmission components (64) for steering being arranged on the rotating shaft (62).

5. The anti-corrosion horizontal screw vacuum pump according to claim 4, characterized in that: The lubrication mechanism (7) comprises a transmission shaft (71) and a No. 3 fixed block (74); the transmission shaft (71) is connected to the rotating shaft (62) via a transmission assembly (64); a No. 1 connecting rod (73) is fixedly connected to the transmission shaft (71); a slider (77) is rotatably connected to the No. 1 connecting rod (73); and a rotating rod (75) is rotatably connected to the No. 3 fixed block (74); a No. 1 slide groove (76) is provided on the rotating rod (75); the slider (77) is slidably connected to the inside of the No. 1 slide groove (76); an end of the rotating rod (75) away from the No. 3 fixed block (74) is rotatably connected to a sliding rod (79); and a piston (710) is fixedly connected to the lower end of the sliding rod (79).

6. The anti-corrosion horizontal screw vacuum pump according to claim 5, characterized in that: The worm vacuum pump body (3) comprises a drive motor (31) and a pump housing (39); an output end of the drive motor (31) is fixedly connected to a driving screw (36); a driving gear (34) is provided on the driving screw (36); the driving gear (34) is meshingly connected to a driven gear (35); a driven screw (37) is fixedly connected to the driven gear (35); an inlet end (32), an outlet end (33) and a gear groove (38) are provided on the pump housing (39); the driving gear (34) and the driven gear (35) are provided on the inner side of the gear groove (38).

7. The anti-corrosion horizontal screw vacuum pump according to claim 6, characterized in that: The pump housing (39) is fixedly connected to an oil tank (8), and the oil tank (8) is provided with an oil inlet pipe (81), an oil outlet pipe (82) and an oil outlet passage (83). The oil inlet pipe (81) and the oil outlet pipe (82) are both arranged to penetrate the gear groove (38), and the piston (710) slides inside the oil outlet passage (83).

8. The anti-corrosion horizontal screw vacuum pump according to claim 2, characterized in that: An activated carbon block (5) for adsorbing impurities is arranged inside the connecting pipe (41), and a hydrophobic membrane (51) for preventing liquid water from passing through is arranged on the activated carbon block (5).

9. The anti-corrosion horizontal screw vacuum pump according to claim 6, characterized in that: The connecting pipe (41) is fixedly connected to the pump housing (39), and the connecting pipe (41) is connected to the inlet end (32) through-through.

10. The anti-corrosion horizontal screw vacuum pump according to claim 7, characterized in that: A second fixing block (72) is fixedly connected to the upper end of the oil tank (8), and the transmission shaft (71) is rotatably connected to the second fixing block (72).

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