CN202833043U - Valve sheet fixing structure of liquid ring vacuum pump - Google Patents

Abstract

The utility model discloses a valve sheet fixing structure of a liquid ring vacuum pump. The valve sheet fixing structure comprises a distributor, a valve plate, a valve sheet, an upper double-screw bolt and a lower double-screw bolt. The valve sheet is hung on the upper double-screw bolt and is arranged between a gap of the distributor and the valve plate. A gap is reserved between a lower through hole of the valve sheet and the lower double-screw bolt, so that the lower end of the valve sheet can slide right and left along the lower double-screw bolt. The valve sheet fixing structure of the liquid ring vacuum pump has the advantages that when the liquid ring vacuum pump works, the valve sheet can be flexibly attached to an air exhaust hole area of the distributor according to different working pressures, and moreover, the valve sheet after being used repeatedly in the working process is little in deformation, and thus the liquid ring vacuum pump can be guaranteed to be sealed and reliable during long-term use and air leakages can not occur. The fact that the liquid ring vacuum pump acts on air repeatedly in the process of operating is effectively prevented, the efficiency and the operating vacuum degrees of the liquid ring vacuum pump are improved, and thus operating energy consumption is reduced. The valve sheet fixing structure of the liquid ring vacuum pump in simple in structure, lowers processing difficulty and simplifies installing procedures.

Description

A kind of liquid-ring vacuum pump valve block fixing structure

Technical field

The utility model relates to the liquid-ring vacuum pump technical field, relates in particular to a kind of liquid-ring vacuum pump valve block fixing structure.

Background technique

Referring to Fig. 1, in liquid-ring vacuum pump, in order to prevent producing the pumped gas overcompression in working procedure, usually at the exhaust port outside of distributor 5 exhaust sides placement of flexible material valve block 2, utilization is fixed on its radial motion scopes of double-screw bolt 3 control of distributor 5 belows, and valve block 2 is in the space between distributor 5 outer surfaces and valve plate 1 internal surface all the time.Valve plate 1 adopts the nut 4 that is spun on double-screw bolt 3 belows to be fixed on the double-screw bolt 3.

When the liquid ring vacuum pump work, pressure in the pump chamber reduces gradually until the required normal operating pressure of system, when the pump chamber internal pressure is lower than head pressure, because pressure reduction concerns that valve block 2 can be attached to and blocks exhaust port 8 on the exhaust port 8 of distributor 5 and prevent that extraneous gas from leaking into pump chamber (referring to Fig. 2).Along with degree of vacuum in the pump chamber increases, exhaust port 8 quantity of being blocked by valve block 2 are more and more and distortion meeting valve block 2 is more and more serious, thereby can make valve block 2 and exhaust port 8 edges produce certain gap when the distortion of valve block 2 is serious gas leak phenomenon occurs, portion gas is repeated acting and causes pump efficiency to descend.Valve block 2 commonly used is that intensity is high, the polyfluortetraethylene plate of corrosion resistance and good now, adopts double-screw bolt 3 fixing in the time of fixedly.There is the problem of distortion with regard to being difficult to resile because hardness is large although this material is durable, the plate face distributor surface of can not well fitting in the time of can causing again sealing like this, thus cause gas leakage.For example when zone of high pressure 6 one sides extruding valve block 2, valve block 2 center regions are to exhaust port 8 sunken insides, the edge of valve block 2 is to the opposite direction perk because polyfluortetraethylene plate hardness is large, this is so that valve block 2 only has the actual contact area in 7 one places with distributor 5 surfaces, that is to say that sealing area only has 7 one places, like this, gas is easy to pass valve block 2 along gas leakage direction (as shown by arrows in FIG.), produces gas leak phenomenon.

Moreover, the applying of valve block 2 and distributor 5 is processes from the bottom up during normal operation, conventional following double-screw bolt 3 supporting way are unfavorable for the motion of valve block 2, when fitting, bottom slightly have deviation can cause valve block 2 tops and exhaust port 8 dislocation, can cause Leakage Gas so, also just cause tolerance decline, the degree of vacuum of liquid-ring vacuum pump not to reach requirement.

The model utility content

The purpose of this utility model is to provide a kind of exhaust port zone of can fitting flexibly, deformation liquid-ring vacuum pump valve block fixing structure little and easy to assembly, its valve block by adopting ductility material good, that intensity is high to make, be arranged in the outside of distributor exhaust port by the upper stud hang, overcome the existing easy distortion of existing liquid-ring vacuum pump valve block fixing structure and caused seal not enough, thereby realized the purpose of this utility model.

The technical problem that the utility model solves can realize by the following technical solutions:

A kind of liquid-ring vacuum pump valve block fixing structure comprises distributor, valve plate, valve block and upper and lower double-screw bolt; The top and bottom of valve block are respectively equipped with upper and lower through hole, and upper and lower double-screw bolt passes and is fixed on from upper and lower through hole respectively on the distributor outer wall, and valve plate is fixed on the upper and lower double-screw bolt by upper and lower nut; It is characterized in that, described valve block be suspended on the upper stud and be placed in distributor and the gap of valve plate between; Leave the gap between the lower through-hole of described valve block and the described lower double-screw bolt, so that the valve block lower end can horizontally slip along lower double-screw bolt.

The beneficial effects of the utility model are:

Liquid-ring vacuum pump is in when work, and valve block can be fitted in distributor exhaust port zone neatly according to different working pressures, and valve block repeatedly use in the course of the work after distortion very little, can guarantee that pump sealing when long-term the use is reliable, can not produce gas leakage; Prevent that effectively pump from repeating acting to gas when operation, improve efficient and the operation degree of vacuum of pump, thereby reduce operation energy consumption; Simple structure has reduced difficulty of processing and has simplified installation procedure.

Description of drawings

Fig. 1 is the structural representation of existing liquid-ring vacuum pump valve block fixing structure.

Fig. 2 is existing liquid-ring vacuum pump valve block fixing structure valve block deformation local shape schematic representation when working;

Fig. 3 is the partial structurtes schematic representation of the utility model liquid-ring vacuum pump valve block fixing structure;

Deformation situation local shape schematic representation when Fig. 4 is the existing liquid-ring vacuum pump valve block fixing structure middle valve plate work of the utility model;

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.

As shown in Figure 3, provide liquid-ring vacuum pump valve block fixing structure of the present utility model among the figure, comprised distributor 200, valve plate 100, valve block 110 and upper and lower double-screw bolt 120a, 120b.Valve block is equipped with upper and lower through hole 111a, 111b in two ends about in the of 110, and upper and lower double- screw bolt 120a, 120b pass respectively upper and lower through hole 111a, 111b and be fixed on the distributor 200.Valve plate 100 is fixed on upper and lower double-screw bolt 120a, the 120b by upper and lower nut 121a, 121b.Valve block 110 is suspended on upper stud 120a upward and is placed between the gap of distributor 200 and valve plate 100; Leave the gap between the lower through-hole 111b of valve block 110 and the lower double-screw bolt 120b, so that valve block 110 lower ends can horizontally slip along lower double-screw bolt 120b.

Valve block 110 is by adopting the line cutting and making with the belt puncher punching at the high-intensity sheet material of softness, when assembling valve block 110, first upper and lower double- screw bolt 120a, 120b are screwed on the distributor 200, upper and lower through hole 111a, 111b with valve block 110 is enclosed within on upper and lower double-screw bolt 120a, the 120b again, then installs valve plate 100 and tightens upper and lower nut 121a, 121b.

As shown in Figure 4, liquid-ring vacuum pump is when work, valve block 110 can be fitted from the bottom up with exhaust port 210, its laminating type and deformation situation are: mind-set exhaust port 210 depressions in the valve block 110, and be adjacent to exhaust port 210 edges and produce gluing, sealing a, valve block 110 can be protruding to the right because of the elasticity of valve block 110 in the part of periphery, exhaust port 210 edge, because valve block 110 materials are soft, zone of high pressure 300a one side on valve block 110 right sides can compress valve block 110 outsides on the surface of distributor 200 again, forms gluing, sealing b;

Because the high strength flexible material of valve block 110 makes valve block 110 can produce the two gluing, sealing a of place, b when work, has greatly increased the sealing between valve block 110 and the distributor 200; Because valve block 110 is from bottom to top applying with distributor 200, this laminating type can not affect the motion of valve block 110, and is not easy and exhaust port 210 generation positional deviations.

More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (2)

1. a liquid-ring vacuum pump valve block fixing structure comprises distributor, valve plate, valve block and upper and lower double-screw bolt; The top and bottom of valve block are respectively equipped with upper and lower through hole, and upper and lower double-screw bolt passes and is fixed on from upper and lower through hole respectively on the distributor outer wall, and valve plate is fixed on the upper and lower double-screw bolt by upper and lower nut; It is characterized in that, described valve block be suspended on the upper stud and be placed in distributor and the gap of valve plate between; Leave the gap between the lower through-hole of described valve block and the described lower double-screw bolt, so that the valve block lower end can horizontally slip along lower double-screw bolt.

2. a kind of liquid-ring vacuum pump valve block fixing structure as claimed in claim 1 is characterized in that, described valve block is rubber valve plate.

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