Screw vacuum pump

Abstract

The utility model discloses a screw vacuum pump, which belongs to the technical field of vacuum pumps and comprises a vacuum machine body, a gear box arranged at one end of the vacuum machine body and used for covering a gear, a conveying box arranged at the top of the gear box, and a filtering component arranged on one side of the conveying box and used for filtering the gear. The filtering assembly comprises a connecting cylinder obliquely arranged on one side of the conveying box, a taking-out cylinder arranged in the connecting cylinder in an inserted mode, a plurality of concave mounting bases transversely and fixedly arranged in the taking-out cylinder, magnet plates inserted in the mounting bases and a threaded nozzle arranged at the opening end of the connecting cylinder. According to the gear lubricating device for the screw vacuum pump, lubricating oil for lubricating a gear of the screw vacuum pump is recycled and filtered, the lubricating oil can be repeatedly used, the lubricating cost is reduced, the lubricating oil can be cleaned in time, and the gear lubricating effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a screw vacuum pump. Background Art

[0002] The twin-screw vacuum pump is an exhaust device that uses two screws to rotate synchronously and at high speed in opposite directions in the pump body to produce suction and exhaust effects. It is an upgraded product of the oil-sealed vacuum pump and can extract gases containing large amounts of water vapor and small amounts of dust. It is widely used in major domestic pharmaceutical and chemical companies.

[0003] At present, twin-screw vacuum pumps include a motor for driving. The motor drives the active screw connected to the active gear to rotate, and the passive teeth of the active gear mesh with the passive gear, so that the passive screw connected to the passive gear rotates at a high speed in the opposite direction to the active screw. For screw vacuum pumps that require lubrication, lubricating oil is usually required to be added to the gear box. These pumps generate heat during operation and require proper lubrication to reduce friction and wear. However, when the lubricating oil in the gear box of the existing screw vacuum pump lubricates the gears, metal debris will be generated due to long-term friction of the gears. If the metal debris in the lubricant is not cleaned in time, the friction on the gear surface will increase, thereby affecting the gear transmission efficiency and life.

[0004] Based on this, it is necessary to propose a screw vacuum pump that can remove metal debris from the lubricant in the gear box. Utility Model Content

[0005] The purpose of the utility model is to provide a screw vacuum pump to solve the above technical problems to at least a certain extent, and to recover the lubricant in the gear box of the screw vacuum pump and remove the metal debris contained in the lubricant.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] It includes a vacuum body and a gear box, wherein the gear box is arranged at one end of the vacuum body to cover the gears;

[0008] a conveying box, which is arranged on top of the gear box;

[0009] A filter assembly is provided on one side of the conveying box. The filter assembly is obliquely provided on a connecting cylinder on one side of the conveying box, plugged into a removal cylinder provided inside the connecting cylinder, and transversely fixedly provided with a plurality of concave mounting seats inside the removal cylinder and a magnet plate plugged into the mounting seats. The filter assembly also includes a threaded nozzle provided at an open end of the connecting cylinder and two disassembly heads provided at the lower end of the removal cylinder.

[0010] A recovery assembly is in communication with the bottom of the gear box, the recovery assembly comprises a recovery tank fixedly arranged at the bottom of the gear box, an oil pump fixedly arranged in the recovery tank, and a discharge pipe connected with the input end of the oil pump;

[0011] A partition plate is arranged in the middle of the recovery tank to divide it into two parts, one end of the extraction pipe extends to the oil loading part of the recovery tank through the partition plate, and one end of the discharge pipe is in communication with the connecting cylinder through the recovery tank;

[0012] A cooling pipe is arranged at the vertical middle part of the discharge pipe, the upper end and the lower end of the cooling pipe are in communication with the discharge pipe to divide it into two parts, and the cooling pipe is made of hollow copper.

[0013] Preferably, a plurality of concave mounting seats are arranged in a triangular ring shape in the interior of the extraction cylinder, and the outer ends of the plurality of magnet plates extend towards each other, and the concave mounting seats are made of a magnetically attractable metal material.

[0014] Preferably, a communication hole for mounting the discharge pipe is arranged on the outer wall of the connecting cylinder, a notch opposite to the communication hole is arranged on the outer wall of the extraction cylinder, and the notch is located between the two magnet plates.

[0015] Preferably, the connecting cylinder is in communication with the connecting part of the conveying tank, and the tail end of the extraction cylinder abuts against the protruding part of the inner ring of the tail end of the connecting cylinder.

[0016] Preferably, an inclined pipeline is arranged on the bottom of the conveying tank and in communication with the gear box, and the outlet end of the inclined pipeline is located at the middle part between the two gears.

[0017] Preferably, a discharge port for conveying the recovery tank is arranged on the bottom of the gear box, and the discharge port is controlled by a valve.

[0018] Preferably, a dismounting hole is arranged on the outer wall of the dismounting head for dismounting, and the threaded nozzle is sealed by a matching nut cap.

[0019] Compared with the prior art, the utility model has the advantages that:

[0020] 1. When the utility model is used, the recovered lubricating oil is conveyed into the extraction cylinder by the oil pump, the left end of the extraction cylinder is inclined upward, the lubricating oil in the extraction cylinder moves into the conveying tank connected with the right end of the extraction cylinder, the metal scraps in the lubricating oil are magnetically attracted by the plurality of magnet plates arranged in the extraction cylinder, the lubricating oil for the gear of the vacuum machine body is recovered and filtered, the use effect of the lubricating oil is improved, the waste of the lubricating oil is reduced, the gear is maintained conveniently, and the maintenance cost is reduced.

[0021] 2. When the utility model is used, the lubricating oil transported from the discharge pipe will pass through the cooling pipe. Since the cooling pipe is made of copper, the lubricating oil passing through the cooling pipe is cooled faster, so that the temperature of the recovered lubricating oil is lowered, and the lubrication effect on the gears is better when it is used again;

[0022] 3. When the utility model is used, the removal tube installed in the connecting tube can be disassembled and removed. At the same time, the magnet plate installed in the concave mounting seat can also be disassembled and removed, which is convenient for cleaning the magnet plate that is saturated with metal debris and ensures the adsorption capacity of the magnet plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a top sectional view of the overall structure of this embodiment;

[0025] Figure 2 This is a schematic diagram of the overall front cross-sectional structure of this embodiment;

[0026] Figure 3 This is a schematic diagram of the three-dimensional structure of the crushing roller of the crushing box machine of this embodiment;

[0027] Figure 4 This is a schematic diagram of the cross-sectional structure of the crushing box in this embodiment;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the crushing roller of the crushing box machine of this embodiment;

[0029] Figure 6 This is a schematic diagram of the cross-sectional structure of the crushing box in this embodiment from a top view.

[0030] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0031] 1. Vacuum body; 2. Gear box; 21. Exhaust port; 3. Delivery box; 31. Inclined pipe; 4. Filter assembly; 41. Connecting tube; 42. Removal tube; 43. Concave mounting seat; 44. Magnet plate; 45. Disassembly head; 46. Threaded nozzle; 411. Connecting hole; 421. Notch; 451. Disassembly hole; 5. Recovery assembly; 51. Recovery box; 52. Extraction pipe; 53. Oil pump; 54. Discharge pipe; 6. Cooling pipe. DETAILED DESCRIPTION

[0032] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the scope of the utility model protection.

[0033] Please refer to Figures 1-6 The utility model provides a technical scheme: a screw vacuum pump, including vacuum machine body 1, gear box 2, gear box 2 sets up in vacuum machine body 1 one end for covering gear;

[0034] Conveying box 3, it sets up at the top of gear box 2;

[0035] Filter assembly 4, it sets up at one side of conveying box 3, filter assembly 4 is obliquely arranged in the connecting cylinder 41 of one side of conveying box 3, the plug-in setting of the taking-out cylinder 42 in the connecting cylinder 41 inside, the multiple concave mounting seats 43 of transverse fixed setting in the taking-out cylinder 42 inside and the magnet plate 44 of plug-in in the mounting seat inside, still including the threaded mouth 46 of setting in the opening end of connecting cylinder 41 and the two disassembly head 45 of setting in the low end of taking-out cylinder 42;

[0036] Recycling assembly 5, it is communicated and sets up at the bottom of gear box 2, recycling assembly 5 includes the recycling box 51 of fixed setting at the bottom of gear box 2, the oil pump 53 of fixed setting in recycling box 51 inside and the discharge pipe 54 of the input end connection of the extraction pipe 52 input end connection with oil pump 53 input end connection;

[0037] Recycling box 51 inside middle part is provided with the baffle that divides it into two, and one end of the extraction pipe 52 extends to the oil loading position of recycling box 51 through the baffle, and one end of the discharge pipe 54 is communicated with the connecting cylinder 41 through recycling box 51;

[0038] Cooling pipe 6, it is set up at the vertical middle position of discharge pipe 54, and the upper end and the lower end of cooling pipe 6 are respectively communicated with discharge pipe 54 and divide it into two, and cooling pipe 6 is made of hollow copper material;

[0039] When recycling the lubricating oil in the gear box 2 of the vacuum machine body 1, the lubricating oil in the gear box 2 is transported to the cavity on the right side of the recycling box 51 through the inclined pipeline 31, the lubricating oil on the right side of the recycling box 51 is extracted by opening the oil pump 53, and the lubricating oil is transported into the cooling pipe 6 through the discharge pipe 54 arranged at the output end of the oil pump 53, the lubricating oil passing through the inside of the cooling pipe 6 is accelerated to cool, so that the temperature of the recycled lubricating oil is reduced, and the lubricating effect of the gear is better when used again;

[0040] The lubricating oil is transported to the connecting cylinder 41 through another section of the discharge pipe 54, and enters the extraction cylinder 42 through the gap 421 of the extraction cylinder 42 inserted in the connecting cylinder 41, and the outlet end of the discharge pipe 54 is opposite to the gap 421, so that the lubricating oil enters the extraction cylinder 42, and the left end of the extraction cylinder 42 is inclined upward, and the lubricating oil entering the extraction cylinder 42 moves to the conveying box 3 connected to the right end of the extraction cylinder 42, and when flowing in the extraction cylinder 42, the metal scraps contained in the lubricating oil are magnetically attracted by the plurality of magnet plates 44 arranged in the extraction cylinder 42, and the recovered lubricating oil is filtered, which can be used for the gear lubricating oil recovery and filtration of the vacuum body 1, improves the use effect of the lubricating oil, reduces the waste of the lubricating oil, and facilitates the maintenance of the gear, while reducing the maintenance cost.

[0041] The outer wall of the extraction cylinder 42 is tightly attached to the inner wall of the connecting cylinder 41, and will not easily rotate in the extraction cylinder 42 without external intervention, and will not affect the displacement of the gap 421 and the transportation of the lubricating oil. At the same time, the extraction cylinder 42 is installed in a plug-in manner, and the nut cap for sealing the connecting cylinder 41 can be opened to take out the extraction cylinder 42 from the connecting cylinder 41.

[0042] Referring to Figure 4 and Figure 6 In some embodiments, the plurality of concave mounting seats 43 are arranged in a ring-shaped triangular distribution in the interior of the extraction cylinder 42, and the outer ends of the plurality of magnet plates 44 extend together, and the concave mounting seat 43 is made of a magnetically attractable metal material;

[0043] The plurality of magnet plates 44 are arranged in a ring-shaped triangular distribution in the extraction cylinder 42, which can more fully adsorb the metal scraps contained in the passing lubricating oil, and improve the filtering effect of the lubricating oil. The concave mounting seat 43 is made of a magnetically attractable metal material, which can firmly install the magnet plate 44, and the concave mounting seat 43 is concave and open at both ends, which facilitates the installation and cleaning of the magnet plate 44.

[0044] Referring to Figure 3 , Figure 4 , Fig. 5, in some embodiments, the outer wall of the connecting cylinder 41 is provided with a communication hole 411 for installing the discharge pipe 54, and the outer wall of the extraction cylinder 42 is provided with a gap 421 opposite to the communication hole 411, and the gap 421 is located between the two magnet plates 44;

[0045] The communication hole 411 for installing the discharge pipe 54 is opposite to the gap 421 of the extraction cylinder 42, so that the lubricating oil enters the extraction cylinder 42.

[0046] Referring to Figure 3 and 4 In some embodiments, the connecting cylinder 41 is connected to the conveying box 3, and the tail end of the extraction cylinder 42 abuts against the protruding part of the inner circle of the tail end of the connecting cylinder 41;

[0047] The tail end of the taking-out cylinder 42 is abutted against the protruding part of the inner ring of the connecting cylinder 41, and the tail end of the inner ring of the connecting cylinder 41 is smaller than the diameter of the taking-out cylinder 42, so that the taking-out cylinder 42 is limited in the installation position.

[0048] Referring to Figure 3 In some embodiments, the bottom of the conveying box 3 is communicated with the gear box 2 through the inclined pipeline 31, and the outlet end of the inclined pipeline 31 is located at the middle part between the two gears.

[0049] The lubricating oil is conveyed into the gear box 2 through the inclined pipeline 31 at the bottom of the conveying box 3 and the top of the gear box 2, and the lubricating oil is conveyed between the two gears, so that the two gears are better contacted with the lubricating oil.

[0050] Referring to Figure 3 、 Figure 4 、 Figure 5 In some embodiments, the bottom of the gear box 2 is provided with a discharge port 21 for conveying to the recycling box 51, the discharge port 21 is controlled by a valve, the outer wall of the dismounting head 45 is provided with a dismounting hole 451 for dismounting, and the threaded nozzle 46 is sealed by a matching nut cap.

[0051] The discharge port 21 is controlled by a valve, the lubricating oil is regularly discharged and treated, the dismounting hole 451 of the dismounting head 45 is used for inserting a hook rod into the dismounting hole 451, and the taking-out cylinder 42 closely fitted in the connecting cylinder 41 is conveniently taken out.

[0052] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0053] In the utility model, unless otherwise specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements or the interaction relationship between two elements, unless otherwise specified, the specific meaning of the above terms in the utility model can be understood according to the specific situation by those skilled in the art.

[0054] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw vacuum pump, comprising a vacuum body (1), a gear box (2) arranged at one end of the vacuum body (1) for covering gears, characterized in that: a conveying box (3) is arranged on top of the gear box (2); a filtering assembly (4) is arranged on one side of the conveying box (3), the filtering assembly (4) is arranged obliquely on a connecting cylinder (41) on one side of the conveying box (3), a taking-out cylinder (42) is inserted into the connecting cylinder (41), a plurality of concave mounting seats (43) are fixed horizontally in the taking-out cylinder (42), and a plurality of magnet plates (44) are inserted into the mounting seats; the filtering assembly (4) further comprises a threaded nozzle (46) arranged at an opening end of the connecting cylinder (41) and two dismounting heads (45) arranged at a lower end of the taking-out cylinder (42); a recycling assembly (5) is arranged in communication at a bottom of the gear box (2), the recycling assembly (5) comprises a recycling box (51) fixedly arranged at the bottom of the gear box (2), an oil pump (53) fixedly arranged in the recycling box (51), and a discharge pipe (54) connected with an input end of the oil pump (53); an extraction pipe (52) connected with the input end of the discharge pipe (54); a partition plate is arranged in the middle of the recycling box (51) to divide it into two parts, one end of the extraction pipe (52) extends to an oil storage position of the recycling box (51) through the partition plate, and one end of the discharge pipe (54) communicates with the connecting cylinder (41) through the recycling box (51); a cooling pipe (6) is arranged at a vertical middle position of the discharge pipe (54), the cooling pipe (6) is in communication with the discharge pipe (54) at upper and lower ends to divide it into two parts, and the cooling pipe (6) is made of hollow copper metal material. A plurality of the concave mounting seats (43) are arranged in a ring-shaped triangular distribution in the taking-out cylinder (42), and outer ends of a plurality of the magnet plates (44) extend towards each other, and the concave mounting seats (43) are made of a magnetically attractable metal material. A communication hole (411) for mounting the discharge pipe (54) is arranged on an outer wall of the connecting cylinder (41), a notch (421) opposite to the communication hole (411) is arranged on an outer wall of the taking-out cylinder (42), and the notch (421) is located between the two magnet plates (44). The connecting cylinder (41) communicates with a connecting position of the conveying box (3), and a tail end of the taking-out cylinder (42) abuts against a protruding position of an inner ring of the tail end of the connecting cylinder (41). An inclined pipeline (31) is arranged at a bottom of the conveying box (3) to communicate with the gear box (2), and an outlet end of the inclined pipeline (31) is located at a middle position of the two gears. A discharge port (21) for conveying to the recycling box (51) is arranged at a bottom of the gear box (2), and the discharge port (21) is controlled by a valve.

2. A screw vacuum pump according to claim 1, characterized in that: A dismounting hole (451) for dismounting is arranged on an outer wall of the dismounting head (45), and the threaded nozzle (46) is sealed by a matching nut cap.

3. A screw vacuum pump according to claim 1, characterized in that: ​ 4. A screw vacuum pump according to claim 1, characterized in that: ​ 5. A screw vacuum pump according to claim 4, characterized in that: ​ 6. A screw vacuum pump according to claim 1, characterized in that: ​ 7. A screw vacuum pump according to claim 1, characterized in that: ​

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