CN212898874U

CN212898874U - Oil-free piston vacuum pump

Info

Publication number: CN212898874U
Application number: CN202021789847.XU
Authority: CN
Inventors: 刘俊玲
Original assignee: Guangdong Zhongde Technology Pump Co ltd
Current assignee: Guangdong Zhongde Technology Pump Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-04-06
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses an oil-free piston vacuum pump relates to vacuum pump technical field, rotate the piston rod of connecting on the pump body, eccentric wheel and eccentric wheel, the top be provided with the pump cover, and the bottom of pump cover and the top of the pump body all have welded the ring flange, wherein a set of the top of ring flange is provided with first breach, and the top of first breach is provided with the second breach, the inside of second breach is fixed with the spacing post of multiunit, the inside of second breach is provided with the diaphragm. The utility model discloses a piston rod is arranged in first breach, and the diaphragm is arranged in the second breach, and the piston rod drives the diaphragm up-and-down motion and carries out reciprocating motion under the rotation of eccentric wheel, utilizes the fixed diaphragm of piston rod to carry out up-and-down motion, has reduced the risk of wearing and tearing, and can dismantle the connection through utilizing pump cover and the pump body through the ring flange, fluidic motion is accomplished in the pump cover, carries out spacing fixed through spacing hole and spacing post convenience to the diaphragm, is convenient for change the operation.

Description

Oil-free piston vacuum pump

Technical Field

The utility model relates to a vacuum pump technical field specifically is an oil-free piston vacuum pump.

Background

The oil-free vacuum pump is a mechanical vacuum pump which can operate without any oil for lubrication, the volume in the cylinder is repeatedly changed by virtue of the reciprocating action of the piston in the cylinder when the oil-free piston vacuum plug pump works so as to suck and discharge fluid, the piston is easy to wear when the piston is utilized to perform reciprocating pumping, a gap is generated to influence the fluid to be discharged, and the body structure is a fixed structure and is inconvenient to maintain and operate.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problem that when a single piston is utilized to perform reciprocating pumping, the piston is easy to wear, a gap is generated to influence the discharge of fluid, and the body structure is a fixed structure and is inconvenient to maintain and operate, the oil-free piston vacuum pump is provided.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an oil-free piston vacuum pump, rotates the piston rod of connecting on the pump body, eccentric wheel and eccentric wheel, the top of the pump body is provided with the pump cover, and the bottom of pump cover and the top of the pump body all have welded the ring flange, and one of them is a set of the top of ring flange is provided with first breach, and the top of first breach is provided with the second breach, the inside of second breach is fixed with the spacing post of multiunit, the inside of second breach is provided with the diaphragm, the both sides of pump cover one end are connected with import and export respectively, and all are provided with check valve in import and the export.

Preferably, the inner side of the diaphragm is provided with a plurality of groups of limiting holes matched with the limiting columns.

Preferably, the pump cover is internally provided with a cavity matched with the diaphragm, and the length of the cavity is greater than that of the piston rod.

Preferably, the inboard of ring flange all is provided with the mounting hole, the pump cover passes through mounting hole and bolt and nut and can dismantle with the pump body and be connected.

Preferably, the length of the top of the piston rod is smaller than that of the first notch, and the length of the top of the piston rod is larger than that of the inside of the pump body.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the piston rod is positioned in the first notch, the diaphragm is positioned in the second notch, the piston rod drives the diaphragm to move up and down to reciprocate under the rotation of the eccentric wheel, and the diaphragm fixed by the piston rod moves up and down, so that the risk of abrasion is reduced;

2. the utility model discloses an utilize the pump cover and the pump body to carry out through the ring flange and can dismantle the connection, fluidic motion is accomplished in the pump cover, carries out spacing fixed through spacing hole and spacing post convenience to the diaphragm, is convenient for change the operation.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an operation diagram of the present invention;

fig. 3 is the structure schematic diagram of the pump cover of the utility model.

In the figure: 1. a pump body; 2. an eccentric wheel; 3. a piston rod; 4. a pump cover; 5. a flange plate; 6. a first notch; 7. a second notch; 8. a limiting column; 9. a diaphragm; 10. a limiting hole; 11. an inlet; 12. an outlet; 13. a one-way valve.

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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "disposed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. The following describes an embodiment of the present invention according to its overall structure.

Referring to fig. 1-3, an oil-free piston vacuum pump includes a pump body 1, an eccentric wheel 2 and a piston rod 3 rotatably connected to the eccentric wheel 2, a pump cover 4 is disposed above the pump body 1, flange plates 5 are welded to the bottom of the pump cover 4 and the top of the pump body 1, a first gap 6 is disposed at the top of the flange plate 5, a second gap 7 is disposed at the top of the first gap 6, a plurality of sets of limit posts 8 are fixed inside the second gap 7, a diaphragm 9 is disposed inside the second gap 7, an inlet 11 and an outlet 12 are connected to two sides of one end of the pump cover 4, and a one-way valve 13 is disposed on each of the inlet 11 and the outlet 12.

In this embodiment, the bottom of the diaphragm 9 may be fixed to the top of the piston rod 3 by glue or the like, so that the piston rod 3 drives the diaphragm 9 to perform reciprocating pumping when performing reciprocating pumping, and fluid inside the pump cover 4 is pumped in and discharged.

Please refer to fig. 1 and 2, the inner side of the diaphragm 9 is provided with a plurality of sets of limiting holes 10 cooperating with the limiting posts 8 to assist the limiting of the diaphragm 9 and avoid the separation.

Please refer to fig. 1 and 2, the pump cover 4 is provided with a cavity inside, which is matched with the diaphragm 9, and the cavity length is longer than the piston rod 3, so that the piston rod 3 can drive the diaphragm 9 to enter the cavity to pump and discharge the fluid.

Please refer to the drawing, the inner sides of the flange 5 are all provided with mounting holes, and the pump cover 4 is detachably connected with the pump body 1 through the mounting holes and the bolts and nuts, so as to facilitate the detachment of the pump cover 4 and the replacement of the auxiliary diaphragm 9.

Please refer to fig. 1 and 2, the length of the top of the piston rod 3 is smaller than the length of the first notch 6, and the length of the top of the piston rod 3 is larger than the length inside the pump body 1, so that the piston rod 3 can move up and down between the cavity and the first notch 6.

The working principle is as follows: under the drive of the motor, make eccentric wheel 2 drive piston rod 3 and rotate to the top position, make piston rod 3 direction of rotation upward movement, and drive the fixed diaphragm 9 of top and upwards promote, make the fluid discharge along the check valve 13 on export 12, then after eccentric wheel 2 rotates the below, make piston rod 3 drive diaphragm 9 and move to first breach 6, make the fluid on diaphragm 9 twitch the import 11 enter into the appearance chamber of pump cover 4, and then reciprocal, realize fluid suction and discharge, utilize spacing hole 10 spacing on spacing post 8 with diaphragm 9, assist the spacing of diaphragm 9, avoid breaking away from, pump cover 4 can be dismantled with the pump body 1 through mounting hole and bolt and nut and be connected, be convenient for the dismantlement of pump cover 4, the change of auxiliary diaphragm 9.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides an oil-free piston vacuum pump, includes and rotates piston rod (3) of connection on pump body (1), eccentric wheel (2) and eccentric wheel (2), its characterized in that: the pump comprises a pump body (1), and is characterized in that a pump cover (4) is arranged above the pump body (1), the bottom of the pump cover (4) and the top of the pump body (1) are welded with flange plates (5), one of the flange plates is a set of the top of the flange plates (5) is provided with first notches (6), the top of the first notches (6) is provided with second notches (7), the inside of the second notches (7) is fixed with a plurality of groups of limiting columns (8), the inside of the second notches (7) is provided with diaphragms (9), the two sides of one end of the pump cover (4) are respectively connected with an inlet (11) and an outlet (12), and the inlet (11) and the outlet (12) are respectively provided with one-.

2. An oil-free piston vacuum pump as claimed in claim 1, wherein: the inner side of the diaphragm (9) is provided with a plurality of groups of limiting holes (10) which are matched with the limiting columns (8).

3. An oil-free piston vacuum pump as claimed in claim 1, wherein: the pump cover (4) is internally provided with a containing cavity matched with the diaphragm (9), and the length of the containing cavity is greater than that of the piston rod (3).

4. An oil-free piston vacuum pump as claimed in claim 1, wherein: the pump cover is characterized in that mounting holes are formed in the inner sides of the flange plates (5), and the pump cover (4) is detachably connected with the pump body (1) through the mounting holes and bolts and nuts.

5. An oil-free piston vacuum pump as claimed in claim 1, wherein: the length of the top of the piston rod (3) is smaller than that of the first notch (6), and the length of the top of the piston rod (3) is larger than that of the inside of the pump body (1).