CN209925169U

CN209925169U - Gas ballast structure for vacuum pump

Info

Publication number: CN209925169U
Application number: CN201920720187.0U
Authority: CN
Inventors: 王德胜; 王横; 王纵
Original assignee: Jinhua Prestige Science Industry And Trade Co Ltd
Current assignee: Jinhua Prestige Science Industry And Trade Co Ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-01-10
Anticipated expiration: 2029-05-20

Abstract

The utility model discloses the comparatively complicated drawback of structure to gas on the vacuum pump among the prior art device is pressed to gas on the vacuum pump provides a gas pressed to structure for vacuum pump, including the pump body, pump case and connecting pipe, be equipped with the exhaust hole on the pump body, the lateral surface of the pump body is equipped with the first connecting hole with exhaust hole intercommunication, and the pump case lateral surface is opened there is the second connecting hole, be equipped with first gas pressed to the gas and pressed the chock plug between the one end of connecting pipe and the first connecting hole, be equipped with second gas pressed to the gas between the other end of connecting pipe and the second connecting hole, the inner and the first connecting hole threaded connection of first gas pressed to the gas, in the first gas pressed to the chock plug of outer end embedding of first gas pressed to the gas, second gas pressed to the screw and second connecting hole threaded connection, the one end of connecting pipe is cup jointed in gas pressed to the chock plug, and. The component quantity of the utility model is less, the whole structure is simpler, and the installation is very convenient.

Description

Gas ballast structure for vacuum pump

Technical Field

The utility model belongs to the technical field of the vacuum pump, concretely relates to gas town structure for vacuum pump.

Background

The vacuum pump is a device for obtaining vacuum by pumping air from a pumped container, and is widely applied to industries such as metallurgy, chemical industry, food, electronic coating and the like. Because the pumped container is not completely clean, impurities such as water vapor and particles in the pumped container easily enter the pump body of the vacuum pump, and if the impurities cannot be discharged in time, the performance of the vacuum pump is easily affected. In order to solve the current situation, a part of vacuum pumps can be provided with ballast structures on the pump body, so that impurities such as water vapor and particles in the pump body can be pumped out, and the ballast devices on the existing vacuum pumps are complex in structure and inconvenient to install.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the drawback comparatively complicated of structure to the gas town device on the vacuum pump among the prior art provides a gas town structure for vacuum pump, and this gas town structural component is few, and overall structure is comparatively simple.

The invention aims to be realized by the following technical scheme: a gas ballast structure for a vacuum pump comprises a pump body, an end cover and a connecting pipe, wherein the pump body is provided with an exhaust hole, the outer side surface of the pump body is provided with a first connecting hole communicated with the exhaust hole, the outer side surface of the end cover is provided with a second connecting hole, a gas ballast screw sleeve and a gas ballast plug head are arranged between one end of the connecting pipe and the first connecting hole, a gas ballast screw is arranged between the other end of the connecting pipe and the second connecting hole, the gas ballast screw sleeve is provided with a first through hole penetrating through the inner end and the outer end of the gas ballast screw sleeve, the inner end of the gas ballast screw sleeve is in threaded connection with the first connecting hole, the gas ballast plug head is embedded into the first through hole from the outer end of the gas ballast screw sleeve, the outer side surface of the gas ballast plug head is attached to the inner wall of the first through hole, the gas ballast plug head is provided with a second through hole penetrating through the two ends of the gas ballast plug head, the second through, the gas ballast screw is in threaded connection with the second connecting hole, the third through hole is communicated with the second connecting hole, one end of the connecting pipe is sleeved in the second through hole of the gas ballast plug head, and the other end of the connecting pipe is sleeved in the third through hole on the gas ballast screw.

In the scheme, the gas ballast structure only comprises the four parts of the connecting pipe, the gas ballast thread sleeve, the gas ballast screw and the gas ballast plug head except the pump body and the end cover of the vacuum pump, the number of the parts is less, and the structure is simpler.

Preferably, the gas ballast plug head and the gas ballast screw are respectively and fixedly arranged at two ends of the connecting pipe. The gas ballast plug head and the gas ballast screw are respectively and fixedly arranged on the connecting pipe, so that the assembly of the gas ballast structure is facilitated.

Preferably, the gas ballast plug head and the gas ballast screw are respectively welded with the circumference of the joint of the connecting pipe. The circumference welding can promote the connection structure intensity of junction, can also guarantee the sealing performance of junction, makes between gas ballast choke plug and the connecting pipe, is difficult for leaking gas between gas ballast screw and the connecting pipe.

Preferably, the gas ballast thread insert is fixedly provided with a limiting surface for limiting the gas ballast plug head in the first through hole, and when the gas ballast plug head is embedded in the first through hole, the inner end of the gas ballast plug head is tightly attached to the limiting surface. In the process of embedding the gas ballast plug head into the first through hole, the inner end of the gas ballast plug head cannot be directly seen, so that whether the gas ballast plug head is installed in place cannot be judged, the arrangement of the limiting surface prevents the gas ballast plug head from being continuously pushed in after being installed in place, an installer can know that the gas ballast plug head is installed in place, and the installation precision is guaranteed.

Preferably, the first through hole is a stepped hole, a thicker end of the stepped hole is disposed toward the connecting pipe, and a stepped surface of the stepped hole serves as the stopper surface.

Preferably, the gas ballast screw sleeve is detachably connected with a limiting pin used for limiting the gas ballast plug head, and when the gas ballast plug head is embedded into the first through hole, the gas ballast plug head is positioned between the limiting surface and the limiting pin. The gas ballast plug is not easy to separate from the first through hole.

Preferably, the ballast plug head is a cylindrical structure, and the diameter of the connecting part of the first through hole and the ballast plug head is equal to the diameter of the ballast plug head.

Preferably, the outer surface of the gas ballast plug head is provided with an annular groove arranged around the gas ballast plug head, and a sealing ring is arranged in the annular groove. The sealing performance between the gas ballast plug head and the gas ballast thread sleeve can be improved by the sealing ring.

Preferably, the second connecting hole is formed in the upper end face of the end cover, the second connecting hole is of an L-shaped structure, and the gas ballast screw is in threaded connection with the inner end of the second connecting hole; the connecting pipe comprises a first connecting section, an inclined section and a second connecting section which are fixedly connected in sequence, the first connecting section and the second connecting section are perpendicular to each other, the first connecting section is connected with the gas ballast screw, and the second connecting section is sleeved in the second through hole of the gas ballast plug head.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses can in time take debris such as vapor, particulate matter in getting into the vacuum pump body out, avoid the performance that should the vacuum pump, and the whole part quantity of this gas town structure is less, simple structure, it is very convenient to install.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the disassembled structure of the present invention;

FIG. 3 is an enlarged view of the gas ballast insert;

FIG. 4 is a schematic view of a spacing pin;

FIG. 5 is a cross-sectional view of the gas ballast insert;

FIG. 6 is an enlarged view of the gas ballast plug;

FIG. 7 is an enlarged view of the gas-filled screw;

FIG. 8 is an enlarged view of the connection tube;

the labels in the figure are: 1. the pump body, 2, the end cover, 3, the connecting pipe, 4, the exhaust hole, 5, first connecting hole, 6, the second connecting hole, 7, gas ballast swivel nut, 8, gas ballast chock plug, 9, gas ballast screw, 10, first through-hole, 11, the second through-hole, 12, the third through-hole, 13, spacing face, 14, ring channel, 15, first linkage segment, 16, slope section, 17, the second linkage segment, 18, spacer pin, 19, mounting hole.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which:

example 1

As shown in fig. 1-8, a ballast structure for a vacuum pump includes a pump body 1, an end cap 2 and a connecting pipe 3, wherein the pump body 1 is provided with an exhaust hole 4, the outer side surface of the pump body 1 is provided with a first connecting hole 5 communicated with the exhaust hole 4, the upper end surface of the end cap 2 is provided with a second connecting hole 6, and the second connecting hole 6 is an L-shaped structure. A gas ballast screw sleeve 7 and a gas ballast plug 8 are arranged between one end of the connecting pipe 3 and the first connecting hole 5, a gas ballast screw 9 is arranged between the other end of the connecting pipe 3 and the second connecting hole 6, a first through hole 10 penetrating through the inner end and the outer end of the gas ballast screw sleeve 7 is formed in the gas ballast screw sleeve 7, the inner end of the gas ballast screw sleeve 7 is in threaded connection with the first connecting hole 5, the gas ballast plug 8 is embedded into the first through hole 10 from the outer end of the gas ballast screw sleeve 7, the outer side surface of the gas ballast plug 8 is attached to the inner wall of the first through hole 10, a second through hole 11 penetrating through the two ends of the gas ballast plug 8 is formed in the gas ballast plug 8, the second through hole 11 is communicated with the first through hole 10, a third through hole 12 penetrating through the gas ballast screw 9 is formed in the gas ballast screw 9, the gas ballast screw 9 is in threaded connection with the inner end of the second connecting hole 6, and the third through hole 12 is communicated with the second connecting. In order to improve the sealing performance, O-shaped sealing rings are respectively arranged between the gas ballast screw sleeve 7 and the first connecting hole 5 and between the gas ballast screw 9 and the second connecting hole 6 for sealing connection.

One end of the connecting pipe 3 is sleeved and fixed in a second through hole 11 of the gas ballast plug 8, the circumference of the joint of the gas ballast plug 8 and the connecting pipe 3 is welded to form a sealing ring, the other end is sleeved and fixed in a third through hole 12 on the gas ballast screw 9, the circumference of the joint of the gas ballast screw 9 and the connecting pipe 3 is welded to form a sealing ring, a limiting surface 13 for limiting the gas ballast plug head 8 is fixedly arranged on the gas ballast screw sleeve 7 in the first through hole 10, the gas ballast screw sleeve 7 is provided with a mounting hole 19, a limit pin 18 for limiting the gas ballast plug head 8 is inserted into the mounting hole 19, the limiting pin 18 is a B-shaped pin, when the gas ballast plug 8 is embedded into the first through hole 10, the gas ballast plug 8 is located between the limiting surface 13 and the limiting pin 18, the inner end of the gas ballast plug 8 is tightly attached to the limiting surface 13, and the limiting pin 18 is tightly attached to the outer end of the gas ballast plug 8. The first through hole 10 is a stepped hole, a thick end of the stepped hole is arranged toward the connecting pipe 3, and a stepped surface of the stepped hole serves as the limiting surface 13.

The gas ballast plug 8 is a cylindrical structure, and the diameter of the connecting part of the first through hole 10 and the gas ballast plug 8 is equal to that of the gas ballast plug 8. The outer surface of the gas ballast plug head 8 is provided with an annular groove 14 arranged around the gas ballast plug head 8, and a sealing ring is arranged in the annular groove 14.

The connecting pipe 3 comprises a first connecting section 15, an inclined section 16 and a second connecting section 17 which are fixedly connected in sequence, the first connecting section 15 and the second connecting section 17 are perpendicular to each other, the first connecting section 15 is connected with the gas ballast screw 9, and the second connecting section 17 is sleeved in the second through hole 11 of the gas ballast plug 8. The connecting pipe 3 that actually produces often possesses certain elasticity, because of gas ballast plug 8 only embolias in the first through-hole 10 of gas ballast swivel nut 7, so can not rely on self to realize the tight fit between gas ballast plug 8 and the gas ballast swivel nut 7, because of connecting pipe 3 other end and gas ballast screw 9 fixed connection, and gas ballast screw 9 and second connecting hole 6 spiro union, so one end of connecting pipe 3 has been fixed, if remove to first through-hole 10 outer end after the gas ballast plug 8 that the other end is connected imbeds in first through-hole 10, can make connecting pipe 3 take place deformation consequently and produce one and push the inside power of first through-hole 10 with gas ballast plug 8, make gas ballast plug 8 difficult to break away from in first through-hole 10.

The gas ballast screw 9 and the gas ballast plug 8 are welded on the connecting pipe 3 in advance, so in actual assembly, only the gas ballast screw 9 needs to be screwed into the inner end of the second connecting hole 6, then the pump body 1 is installed in the end cover 2, then the gas ballast screw sleeve 7 is screwed into the first connecting hole 5, and then the connecting pipe 3 is pulled off, so that the gas ballast plug 8 on the connecting pipe 3 is embedded into the first through hole 10 of the gas ballast screw sleeve 7, and the installation is very convenient. In the in-service use, can set up a closing cap in the outer end of second connecting hole 6, open the closing cap at the vacuum pump during operation, make this gas town structure can work, this gas town structure can in time discharge debris such as inside vapor of the vacuum pump body, particulate matter this moment, guarantee the performance of vacuum pump. When the vacuum pump is stopped, the outer end of the second connecting hole 6 is plugged by the sealing cover, so that external sundries are prevented from entering the pump body of the vacuum pump.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a gas town structure for vacuum pump, its characterized in that, includes the pump body (1), end cover (2) and connecting pipe (3), is equipped with exhaust hole (4) on the pump body (1), the lateral surface of the pump body (1) is equipped with first connecting hole (5) with exhaust hole (4) intercommunication, and open end cover (2) lateral surface has second connecting hole (6), be equipped with gas town swivel nut (7) and gas town plug (8) between the one end of connecting pipe (3) and first connecting hole (5), be equipped with gas town screw (9) between the other end of connecting pipe (3) and second connecting hole (6), it has first through-hole (10) that run through gas town swivel nut (7) inside and outside both ends to open on gas town swivel nut (7), the inner and first connecting hole (5) threaded connection of gas town swivel nut (7), gas town plug (8) from the embedding of gas town swivel nut (7) in first through-hole (10) and gas plug (8) lateral surface and first through-hole (10) in, gas town plug (8) outside the interior The wall laminating, it has second through-hole (11) that runs through gas town choke plug (8) both ends to open on gas town choke plug (8), second through-hole (11) and first through-hole (10) intercommunication, it has third through-hole (12) that runs through gas town screw (9) to open on gas town screw (9), and gas town screw (9) and second connecting hole (6) threaded connection and third through-hole (12) and second connecting hole (6) intercommunication, the one end of connecting pipe (3) cup joints in second through-hole (11) of gas town choke plug (8), and the other end cup joints in third through-hole (12) on gas town screw (9).

2. A ballast structure for a vacuum pump according to claim 1, wherein the ballast plug (8) and the ballast screw (9) are fixedly arranged at both ends of the connecting tube (3), respectively.

3. A gas ballast structure for a vacuum pump according to claim 2, wherein the gas ballast plug head (8) and the gas ballast screw (9) are respectively welded circumferentially at the connection with the connecting tube (3).

4. A gas ballast structure for a vacuum pump according to claim 1, 2 or 3, wherein the gas ballast screw sleeve (7) is fixedly provided with a limiting surface (13) for limiting the gas ballast plug head (8) in the first through hole (10), and when the gas ballast plug head (8) is inserted into the first through hole (10), the inner end of the gas ballast plug head (8) is tightly attached to the limiting surface (13).

5. A gas ballast structure for a vacuum pump according to claim 4, wherein the first through hole (10) is a stepped hole having a thicker end disposed toward the connecting pipe (3) and having a stepped surface serving as the stopper surface (13).

6. A gas ballast structure for a vacuum pump according to claim 5, wherein a stopper pin (18) for stopping the gas ballast plug head (8) is detachably connected to the gas ballast screw sleeve (7), and when the gas ballast plug head (8) is inserted into the first through hole (10), the gas ballast plug head (8) is located between the stopper surface (13) and the stopper pin (18).

7. A gas ballast structure for a vacuum pump according to claim 5 or 6, wherein the gas ballast plug head (8) is a cylindrical structure, and the diameter of the connection part of the first through hole (10) and the gas ballast plug head (8) is equal to the diameter of the gas ballast plug head (8).

8. A ballast construction for a vacuum pump according to claim 7, wherein the ballast plug head (8) is provided with an annular groove (14) on its outer surface arranged around the ballast plug head (8), the annular groove (14) being provided with a sealing ring therein.

9. A gas ballast structure for a vacuum pump according to claim 1, wherein the second connecting hole (6) is arranged on the upper end face of the end cover (2), the second connecting hole (6) is of an L-shaped structure, and the gas ballast screw (9) is in threaded connection with the inner end of the second connecting hole (6); the connecting pipe (3) comprises a first connecting section (15), an inclined section (16) and a second connecting section (17) which are fixedly connected in sequence, the first connecting section (15) and the second connecting section (17) are mutually perpendicular, the first connecting section (15) is connected with the gas ballast screw (9), and the second connecting section (17) is sleeved in a second through hole (11) of the gas ballast plug head (8).