CN218522808U

CN218522808U - Oil return prevention check valve for rotary vane vacuum pump

Info

Publication number: CN218522808U
Application number: CN202221722075.7U
Authority: CN
Inventors: 薛海英; 梁树旺
Original assignee: Guangxi Heshan Huazhen New Material Co ltd
Current assignee: Guangxi Heshan Huazhen New Material Co ltd
Priority date: 2022-07-06
Filing date: 2022-07-06
Publication date: 2023-02-24
Anticipated expiration: 2032-07-06

Abstract

The utility model discloses a prevent returning oil check valve for rotary-vane vacuum pump, including the check valve main part, the inner wall block of check valve main part one end is equipped with the support frame, and the intermediate position block of support frame inner wall is equipped with the filter screen, and one side of support frame outer wall is fixed and is equipped with the arc fixed strip, and the intermediate position at arc fixed strip both ends is the fixed fixture block that is equipped with all, and the fixed handle that is equipped with in intermediate position on arc fixed strip top, the edge of arc fixed strip inner wall both sides is the fixed first sealing strip that is equipped with all. The utility model discloses, can go into the arc draw-in groove with this structure card when using the check valve, go into first screw and second screw respectively through fixing bolt after block and the card hole block with it fixed, can not the oil leak when making its use under the effect of first sealing strip, can open it after filtering on the filter screen to save a certain amount of impurity simultaneously and take out and clean for impurity dust in the vacuum pump is difficult to the valve body that blocks up, thereby the life of improving means.

Description

Oil return prevention check valve for rotary vane vacuum pump

Technical Field

The utility model relates to a prevent returning oily check valve's technical field, in particular to prevent returning oily check valve for rotary-vane vacuum pump.

Background

The traditional rotary-vane vacuum pump is mainly a rotary-vane rotary equipment for evacuating the interior of a pump body through a stator and a rotor, the rotor eccentrically arranged in the rotary-vane vacuum pump is tangent to a stator fixing surface, two (or more) rotary vanes slide (generally in a radial direction) in a rotor groove and are in contact with the inner wall of the stator, and a pump cavity is divided into a plurality of variable volumes. Generally, a gap between the rotary vane and the pump cavity is sealed by oil, so the rotary vane vacuum pump is generally an oil-sealed mechanical vacuum pump, and an oil return check valve is usually arranged in the rotary vane vacuum pump for preventing oil in the pump body from returning, so that the device cannot be used due to oil liquid backflow;

in view of the above, chinese patent No. CN216278492U discloses an oil return prevention check valve for a rotary-vane vacuum pump, which includes an oil return check valve main body, the oil return check valve main body is provided with a water inlet, an inner wall of the oil return check valve main body is provided with an inner cavity, an observation assembly is disposed on an outer wall of the oil return check valve main body, the observation assembly includes two sets of fixing plates fixed on an outer wall of the oil return check valve main body, a rotating shaft fixed between the two sets of fixing plates, a loop bar sleeved on the rotating shaft, a protection plate on the fixing loop bar, and an observation window disposed on the outer wall of the oil return check valve main body, and a cleaning assembly is disposed on the observation assembly; the observation subassembly through setting up, wherein the observation subassembly includes the fixed plate, the apparatus further comprises a rotating shaft, the loop bar, guard plate and observation window, make the staff can observe the trouble condition of intracavity through the observation window through the device, but this kind of design can't block the impurity that wherein produces to the vacuum pump of long-time use, the vacuum pump can carry a certain amount of dust or impurity when managing the time work and carry out the inside of device, if this check valve is inside not to have the block structure, can cause dust or impurity to adhere to inside the valve body when preventing returning oil, long-time accumulation can lead to the valve body to damage, thereby reduce device's life.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil return prevention check valve for rotary-vane vacuum pump to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a prevent returning oil check valve for rotary-vane vacuum pump, includes the check valve main part, the inner wall block of check valve main part one end is equipped with the support frame, the intermediate position block of support frame inner wall is equipped with the filter screen, the fixed arc fixed strip that is equipped with in one side of support frame outer wall, the intermediate position at arc fixed strip both ends is all fixed and is equipped with the fixture block, two first screw has all been seted up to the intermediate position of fixture block one side, the fixed handle that is equipped with in intermediate position on arc fixed strip top, the edge of arc fixed strip inner wall both sides is all fixed and is equipped with first sealing strip.

Preferably, an arc-shaped clamping groove is formed in one end of one side of the outer wall of the check valve main body, the inner wall of the arc-shaped clamping groove is communicated with the inside of the check valve main body, and the outer wall of the arc-shaped fixing strip is connected with the inner wall of the arc-shaped clamping groove in a clamping mode.

Preferably, the lower extreme of arc draw-in groove inner wall both sides all is fixed to be equipped with the spacing strip of arc, and one side of two first sealing strips respectively with one side contact of two spacing strips of arc.

Preferably, the middle positions of the two ends of the inner wall of the arc-shaped clamping groove are provided with clamping holes, and the outer walls of the clamping blocks are respectively connected with the inner walls of the two clamping holes in a clamping manner.

Preferably, the two sides of the outer wall of the check valve main body are both provided with second screw holes, one side of the inner wall of the check valve main body is fixedly provided with a second sealing strip, and one side of the support frame is in contact with one side of the second sealing strip.

Preferably, two the inner wall of second screw all alternates and is equipped with fixing bolt, and the outer wall of two fixing bolt one ends passes the inner wall of two second screws and the inner wall threaded connection of two first screws respectively, the outer wall at non-return valve main part both ends all is equipped with seal ring.

The utility model discloses a technological effect and advantage:

(1) The utility model discloses a be provided with the valve body internal filtration structure who makes things convenient for the dismouting on the device, and this structure mainly comprises support frame, the filter screen, the arc fixed strip, the fixture block, first screw, the handle, first sealing strip and card hole, can go into this structure card when using the check valve in the arc draw-in groove, go into respectively through fixing bolt card after block and card hole block and fix it in first screw and second screw, can not leak oil when making it use under the effect of first sealing strip, can open it after filtering on the filter screen and collecting a certain amount of impurity simultaneously and take it out and clean, make the impurity dust in the vacuum pump be difficult to the jam valve body, thereby improve the life of device;

(2) The utility model discloses a setting up the mounting structure that has sealing performance on the device, and this structure is mainly by the arc draw-in groove, the spacing strip of arc, the card hole, constitute such as second screw and second sealing strip, can install filtration in check valve main part upper end through the arc draw-in groove, and can be with fixed through card hole and screw, the spacing strip of cooperation arc makes whole structure be in encapsulated situation with first sealing strip contact and support frame and second sealing strip contact, be difficult for the oil leak, the clearance that makes things convenient for the staff to pack up is maintained, thereby improve the convenience that the device used.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the support frame and the filter screen of the present invention.

Fig. 3 is a schematic structural diagram of the installation of the arc-shaped clamping groove of the present invention.

In the figure: 1. a check valve body; 2. a support frame; 3. a filter screen; 4. an arc-shaped fixing strip; 5. a clamping block; 6. a first screw hole; 7. a handle; 8. a first seal strip; 9. an arc-shaped clamping groove; 10. an arc-shaped limiting strip; 11. a clamping hole; 12. a second screw hole; 13. a second seal strip; 14. fixing the bolt; 15. a gasket is provided.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides an oil return prevention check valve for a rotary vane vacuum pump as shown in figures 1-3, which comprises a check valve main body 1, wherein second screw holes 12 are arranged on both sides of the outer wall of the check valve main body 1, a second sealing strip 13 is fixedly arranged on one side of the inner wall of the check valve main body 1, one side of a support frame 2 is contacted with one side of the second sealing strip 13, fixing bolts 14 are inserted into the inner walls of the two second screw holes 12, the outer walls of one ends of the two fixing bolts 14 respectively pass through the inner walls of the two second screw holes 12 to be in threaded connection with the inner walls of the two first screw holes 6, and sealing gaskets 15 are sleeved on the outer walls of both ends of the check valve main body 1;

as shown in fig. 2, a support frame 2 is clamped on the inner wall of one end of a check valve main body 1, a filter screen 3 is clamped at the middle position of the inner wall of the support frame 2, an arc-shaped fixing strip 4 is fixedly arranged on one side of the outer wall of the support frame 2, clamping blocks 5 are fixedly arranged at the middle positions of two ends of the arc-shaped fixing strip 4, first screw holes 6 are respectively formed at the middle positions of one sides of the two clamping blocks 5, a handle 7 is fixedly arranged at the middle position of the top end of the arc-shaped fixing strip 4, and first sealing strips 8 are respectively fixedly arranged at the edges of two sides of the inner wall of the arc-shaped fixing strip 4;

as shown in fig. 3, arc draw-in groove 9 has been seted up to the one end of 1 outer wall one side of check valve main part, and the inner wall of arc draw-in groove 9 and the inside intercommunication of check valve main part 1, and the outer wall of arc fixed strip 4 is connected with the inner wall block of arc draw-in groove 9, the lower extreme of the inner wall both sides of arc draw-in groove 9 is the fixed spacing strip 10 that is equipped with of arc all, and one side of two first sealing strips 8 contacts with one side of two spacing strips 10 of arc respectively, card hole 11 has all been seted up to the intermediate position at arc draw-in groove 9 inner wall both ends, and the outer wall of two fixture blocks 5 is connected with the inner wall block of two card holes 11 respectively.

The utility model discloses theory of operation: when the oil return prevention check valve for the rotary-vane vacuum pump in the design scheme is used, firstly, a filtering structure at the upper end of the device is required to be installed in an arc-shaped clamping groove 9 at the upper end of a check valve main body 1 through a handle 7 and an arc-shaped fixing strip 4, so that the device can be normally used, and in the design scheme, the filtering structure inside a valve body, which is convenient to disassemble and assemble and consists of a supporting frame 2, a filter screen 3, the arc-shaped fixing strip 4, a clamping block 5, a first screw hole 6, a handle 7, a first sealing strip 8, a clamping hole 11 and the like, is arranged, when the check valve is used, the structure can be clamped into the arc-shaped clamping groove 9, the clamping block 5 and the clamping hole 11 are clamped and then respectively clamped into the first screw hole 6 and a second screw hole 12 through a fixing bolt 14 to fix the clamping block and oil leakage is avoided when the check valve is used under the action of the first sealing strip 8, simultaneously can open it after gathering up a certain amount of impurity and take out and clean, make the impurity dust in the vacuum pump be difficult for blocking up the valve body, thereby improve device's life, and be provided with on this device by arc draw-in groove 9, arc spacing strip 10, card hole 11, the mounting structure who has sealing performance that second screw 12 and second sealing strip 13 etc. are constituteed, can install filtration in check valve main part 1 upper end through arc draw-in groove 9, and can be fixed through card hole 11 and screw, cooperation arc spacing strip 10 makes overall structure be in encapsulated situation with the contact of first sealing strip 8 and support frame 2 and the contact of second sealing strip 13, be difficult for the oil leak, make things convenient for the clearance maintenance that the staff packed up, thereby improve the convenience that the device used.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses the standard parts that use all can purchase from the market, and dysmorphism piece all can be customized according to the record of the description with the drawing.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a prevent returning oil check valve for rotary-vane vacuum pump, includes check valve main part (1), its characterized in that, the inner wall block of check valve main part (1) one end is equipped with support frame (2), the intermediate position block of support frame (2) inner wall is equipped with filter screen (3), one side of support frame (2) outer wall is fixed and is equipped with arc fixed strip (4), the intermediate position at arc fixed strip (4) both ends is all fixed and is equipped with fixture block (5), two first screw (6) have all been seted up to the intermediate position of fixture block (5) one side, the fixed handle (7) that is equipped with in intermediate position on arc fixed strip (4) top, the edge of arc fixed strip (4) inner wall both sides is all fixed and is equipped with first sealing strip (8).

2. The oil return prevention check valve for the rotary vane vacuum pump according to claim 1, wherein an arc-shaped clamping groove (9) is formed at one end of one side of the outer wall of the check valve main body (1), the inner wall of the arc-shaped clamping groove (9) is communicated with the inside of the check valve main body (1), and the outer wall of the arc-shaped fixing strip (4) is connected with the inner wall of the arc-shaped clamping groove (9) in a clamping manner.

3. The oil return prevention check valve for the rotary vane vacuum pump according to claim 2, wherein the lower ends of the two sides of the inner wall of the arc-shaped clamping groove (9) are respectively and fixedly provided with an arc-shaped limiting strip (10), and one side of each of the two first sealing strips (8) is respectively contacted with one side of each of the two arc-shaped limiting strips (10).

4. The oil return prevention check valve for the rotary vane vacuum pump according to claim 2, wherein the middle positions of the two ends of the inner wall of the arc-shaped clamping groove (9) are respectively provided with a clamping hole (11), and the outer walls of the two clamping blocks (5) are respectively connected with the inner walls of the two clamping holes (11) in a clamping manner.

5. The oil return prevention check valve for the rotary vane vacuum pump according to claim 1, wherein the check valve body (1) is provided with second screw holes (12) on both sides of the outer wall, a second sealing strip (13) is fixedly arranged on one side of the inner wall of the check valve body (1), and one side of the support frame (2) is in contact with one side of the second sealing strip (13).

6. The oil return prevention check valve for the rotary vane vacuum pump according to claim 5, wherein the inner walls of the two second screw holes (12) are inserted with fixing bolts (14), the outer walls of one ends of the two fixing bolts (14) respectively penetrate through the inner walls of the two second screw holes (12) to be in threaded connection with the inner walls of the two first screw holes (6), and the outer walls of the two ends of the check valve main body (1) are sleeved with sealing gaskets (15).