CN211649141U

CN211649141U - Vacuum stop valve

Info

Publication number: CN211649141U
Application number: CN202020266368.3U
Authority: CN
Inventors: 仰国其
Original assignee: Shanghai Green Gongying Environmental Protection Technology Co ltd
Current assignee: Chengdu Qianji Enterprise Management Consulting Co.,Ltd.
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-10-09
Anticipated expiration: 2030-03-06

Abstract

The utility model discloses a vacuum stop valve, including valve body and the valve gap that links to each other with the valve body, be equipped with the inflow passageway and the outflow passageway that communicate each other on the valve body, and the inflow passageway adopts smooth connection with the outflow passageway, the passageway department of outflow passageway is provided with the wall spare that can take place deformation, the vacuum negative pressure that the upper portion space that separates the spare and constitute with the valve gap through the valve gap top sets up inserts mouthful and first vacuum source intercommunication, and first vacuum source is used for controlling to cut off opening and closing outflow passageway of spare, outflow passageway and second vacuum source intercommunication, first vacuum source and second vacuum source are same vacuum source or different vacuum sources. The utility model discloses can improve the fluid especially semi-solid state fluidic trafficability characteristic, guarantee vacuum stop valve's gas tightness, prolong vacuum valve's life.

Description

Vacuum stop valve

Technical Field

The utility model relates to a stop valve field specifically is a vacuum stop valve.

Background

The design idea of the existing vacuum stop valve is to arrange a base stem and a cup leather matched with the base stem on a fluid flow channel, and to realize the attachment and separation of the base stem and the cup leather by controlling the deformation of the cup leather, thereby realizing the opening and closing of the fluid flow channel. In addition, in order to better realize the attachment and the separation between the base stem and the leather cup, the deformation reaction speed of the leather cup is enhanced by adding a spring, a push rod and other structures. The existing vacuum stop valve has the following problems:

(1) the base peduncle is arranged on the fluid flow channel, the flow of the fluid is inevitably hindered to a certain extent, especially when the fluid is in a semi-solid state, the semi-solid state fluid can pass through the stop valve by turning over the base peduncle, the base peduncle inevitably causes the flow rate of the fluid to be reduced, even the fluid is clamped at the base peduncle, and the trafficability of the vacuum stop valve is further influenced, even the normal use is further influenced. The height of the base stem cannot be made too low to function as a stop, and therefore, the base stem of the existing vacuum stop valve inevitably affects the fluid flow.

(2) The vacuum stop valve with the existing structure relies on the joint between the leather cup and the base stem to realize the blocking of a fluid flow channel, the joint between the leather cup and the base stem depends on the elasticity of the leather cup and the acting force of a reinforcing member such as a spring, a push rod and the like, but the leather cup and the base stem belong to line contact, the pressure intensity of two sides of the base stem is unequal, or the difference is larger, one side of the base stem is atmospheric pressure, the other side is vacuum negative pressure, the pressure intensity difference can lead the leather cup to incline to the vacuum negative pressure side, the contact between the leather cup and the base stem is changed into the contact under the non-ideal condition, under the original ideal condition, the lowest point of the leather cup should be placed on the base stem, the pressure intensity of two sides of the base stem is not balanced, the lowest point of the leather cup can be placed on the side (the vacuum negative pressure side) with larger pressure intensity of the base stem, and the stem and the base stem and the leather cup can not be tightly jointed, that is, the cup and the stem cannot completely block the fluid flow passage, thereby causing the vacuum stop valve to fail.

SUMMERY OF THE UTILITY MODEL

For overcoming the not enough of prior art, the utility model provides a vacuum stop valve solves current vacuum stop valve and influences the trafficability characteristic of fluid especially semi-solid state fluid easily to and the problem that vacuum stop valve became invalid easily.

The utility model provides a technical scheme that above-mentioned problem adopted is:

the utility model provides a vacuum stop valve, includes the valve body and the valve gap that links to each other with the valve body, be equipped with the inflow passageway and the outflow passageway of mutual intercommunication on the valve body, and flow in the passageway and adopt smooth connection with the outflow passageway, the passageway department of outflow passageway is provided with the wall piece that can take place deformation, the vacuum negative pressure that the upper portion space that separates the piece and constitute with the valve gap through the valve gap top sets up inserts mouthful and first vacuum source intercommunication, and first vacuum source is used for controlling the wall piece and opens and close outflow passageway, outflow passageway and second vacuum source intercommunication, first vacuum source and second vacuum source are same vacuum source or different vacuum sources.

Further, as a preferred technical solution, an included angle formed by projections of center lines of the inflow channel and the outflow channel on a vertical plane is greater than or equal to 90 degrees and less than 180 degrees.

Further, as a preferred technical solution, an included angle formed by projections of center lines of the inflow channel and the outflow channel on a vertical plane is greater than or equal to 120 degrees and less than or equal to 145 degrees.

Further, as a preferred technical scheme, the partition member is an elastic membrane which is concave-convex in the upper part and convex-concave in the lower part in the natural state and is attached to a channel port of the outflow channel, so that the fluid channel is cut off; under the condition that the vacuum negative pressure on the valve cover is connected, the state of the elastic membrane is changed from concave-convex to convex-concave and separated from the channel opening of the outflow channel, so that the opening of the fluid channel is realized.

Further, as a preferred technical scheme, the elastic membrane is of a bowl-shaped structure made of rubber.

Further, as a preferable technical solution, a center line of the outflow channel passes through a lowest point of the partition member, and the lowest point of the partition member is located in the outflow channel in a natural state.

Further, as a preferred technical solution, the partition member is located right above a channel port of the outflow channel, and the vacuum negative pressure inlet is located right above the partition member.

Further, as a preferred technical solution, the valve further comprises a limiting member, and the limiting member is disposed between the partition member and the valve cover.

Further, as a preferred technical solution, the passage opening of the outflow passage is provided with an annular inclined surface, and the lower side of the annular inclined surface is located on the inner wall of the outflow passage.

Further, as a preferred technical scheme, an annular protrusion matched with the annular inclined plane is arranged on the partition piece.

Compared with the prior art, the utility model, following beneficial effect has is:

(1) the utility model discloses abandoned traditional base stalk design, set up original passageway into the inflow passageway and the outflow passageway that communicate each other, and the inflow passageway adopts level and smooth connection with the outflow passageway, the junction of inflow passageway and outflow passageway does not have the arch, the structure of blocking of base stalk class etc., do not have any between the passway of inflow passageway and the passway of outflow passageway and block, the fluid enters into the outflow passageway along the inflow passageway, need not to overturn any obstacle, fluid channel's patency and fluid velocity of flow are not influenced in such design has been guaranteed.

(2) The utility model discloses on the basis of having abandoned the base stalk, direct with the wall setting in the passageway department of outflow passageway, realize the on-off control to fluid channel through the mode of opening and blocking outflow passageway, under natural state, the laminating of wall is on the passageway of outflow passageway, it is the annular contact to separate that the piece realizes with outflow passageway, the atress is even, and because outflow passageway's the other end is vacuum negative pressure source, therefore, separate the piece under the dual function of self elasticity and vacuum negative pressure, be inhaled the passageway department of outflow passageway firmly, and do not have other external forces to destroy this kind of balanced type annular contact, thereby the contact reliability and the stability of wall and outflow passageway have been improved greatly, can prolong the life of whole vacuum stop valve.

(3) The utility model discloses can accelerate the deformation recovery rate of separating the piece, make to separate the piece and resume original state more fast and with the passway of outflow passageway laminate firmly, block, realize the quick response that ends of the fluid, improved the speed that ends of vacuum stop valve greatly.

Drawings

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

FIG. 2 is a projection of the inflow channel and the outflow channel in a vertical plane;

FIG. 3 is a view showing a structure of a vacuum shut-off valve when projections of center lines of an inflow passage and an outflow passage on a horizontal plane coincide;

FIG. 4 is a view showing a structure of a vacuum shut-off valve when projections of center lines of an inflow passage and an outflow passage on a horizontal plane are not coincident;

FIG. 5 is a schematic view of the structure of the channel opening of the outflow channel;

fig. 6 is a schematic view of the structure when the outflow passage is in contact with the shut-off member.

The names corresponding to the marks in the drawings are as follows:

1. the valve comprises a valve body, a valve cover, a valve body 3, an inflow channel, a valve body 4, an outflow channel, a valve body 5, a partition part 6, a vacuum negative pressure access port 7, a limiting part 41, an annular inclined plane 51 and an annular bulge.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

Example 1

As shown in fig. 1, the utility model discloses a vacuum stop valve that preferred embodiment is shown, including valve body 1 and the valve gap 2 that links to each other with valve body 1, be equipped with the inflow passageway 3 and the outflow passageway 4 of mutual intercommunication on the valve body 1, and the inflow passageway 3 adopts smooth connection with outflow passageway 4, outflow passageway 4's passageway department is provided with the wall spare 5 that can take place deformation, the upper space that wall spare 5 and valve gap 2 are constituteed passes through vacuum negative pressure access mouth 6 and the first vacuum source intercommunication that valve gap 2 top set up, first vacuum source is used for controlling opening and closing of separating 5 convection current outflow passageway 4 of wall spare, outflow passageway 4 and second vacuum source intercommunication, first vacuum source and second vacuum source are same vacuum source or different vacuum sources.

The fluid channel of traditional vacuum stop valve is a straight line channel, and it must set up base stalk structure in order to cut off, opens and blocks through setting up base stalk and cooperation leather cup structure in the channel in order to realize the channel, and the fluid flows the in-process in the channel, must cross base stalk and just can continue to flow, must lead to the fluidic flow no matter to pass through speed or patency all can receive certain influence like this. And the utility model discloses a solve this current difficult problem, the innovative design has been made, traditional base stalk design has been abandoned, set up original passageway into the inflow passageway 3 and the outflow passageway 4 that communicate each other, and inflow passageway 3 adopts smooth connection with outflow passageway 4, so-called smooth connection, the junction that indicates inflow passageway 3 and outflow passageway 4 does not have the arch, the structure of blocking of base stalk class, do not have any between the passway of inflow passageway 3 and the passway of outflow passageway 4 and block, the fluid enters into outflow passageway 4 along inflow passageway 3, need not to climb over any obstacle, this has essential difference with traditional vacuum stop valve, fluid passage's patency and fluid flow rate are not influenced have been guaranteed in such design.

In addition, the traditional vacuum stop valve realizes the closing of a fluid channel by means of the linear contact between the leather cup and the base stem, the contact between the leather cup and the base stem completely depends on the elastic force of the leather cup, even if external force is applied to ensure that the leather cup is well contacted with the base stem, an objective problem cannot be avoided, namely, the problem of unbalanced pressure is solved, because one side of the base stem is inflow, the other side is outflow, the inflow side is atmospheric pressure, and the outflow side is adsorbed by vacuum negative pressure, the vacuum negative pressure is realized, namely, the pressure on the two sides of the base stem is unbalanced, the unbalance tends to cause the uneven stress of the leather cup in the horizontal direction, the leather cup tends to incline to the vacuum negative pressure side (fluid outflow) and even move towards the vacuum negative pressure side, and under the original ideal condition, the lowest point of the leather cup is required to fall on the base stem, and the pressure on the two sides of the base stem is unbalanced, the lowest point of the leather cup can fall on the side (vacuum negative pressure side) with larger pressure intensity of the base stem, so that the contact between the leather cup and the base stem is changed into the contact under the non-ideal condition. For this reason, the utility model discloses on the basis of base stalk has been abandoned, direct will separate piece 5 and set up in outflow channel 4's passageway department, realize the on-off control to fluid channel through opening and the mode that blocks outflow channel 4, under natural state, separate 5 laminating in outflow channel 4's passageway department, it is the annular contact that separates 5 and outflow channel 4 realization, the atress is even, and because outflow channel 4's the other end is the vacuum negative pressure source, therefore, separate 5 under the dual function of self elasticity and vacuum negative pressure, be inhaled outflow channel 4's passageway department firmly, and do not have other external force to destroy this kind of balanced type annular contact, thereby the contact reliability and the stability of separating 5 with outflow channel 4 have been improved greatly, can prolong the life of whole vacuum stop valve. In addition, just be based on such design, the utility model discloses can also improve vacuum stop valve's cut-off speed, because the deformation speed that singly leans on to separate the piece (like the leather cup) controls fluid and can produce certain time delay by speed, so the current design that adopts spring, push rod etc. to improve the leather cup and resume deformation speed in addition, these designs not only the effect general, and the live time has long probably resulted in the card to pause moreover, more influences cut-off speed. And the utility model discloses a design just in time can solve this problem, after closing first vacuum source, cut off 5 and resume deformation gradually under the negative pressure effect that does not receive first vacuum source, and simultaneously, the second vacuum source of 5 below of cutting off plays a negative pressure effect to cutting off 5, the deformation recovery rate of cutting off 5 has been accelerated, make to resume original state more fast and will flow passageway 4 and laminate firmly at cutting off 5, realize the quick response that ends of the fluid, the speed of ending of vacuum stop valve has been improved greatly.

It should be noted that, in fig. 1, there is theoretically a certain dead angle between the right side in the valve body 1 and the partition 5, which may cause a very small amount of fluid to remain therein, but since the distance from the right side in the valve body 1 to the outflow channel 4 is very small, the dead angle space of this portion is negligible, and will not affect the flow of the fluid and the opening and closing of the partition 5. In addition, in order to avoid dead corners, the right side in the valve body 1 can be made into an inclined surface or an inclined curved surface, and the partition piece 5 is attached to the inclined surface or the inclined curved surface while the partition piece 5 descends and the outflow channel 4 is blocked in a natural state, so that fluid residue is avoided as much as possible.

In this embodiment, it is preferable that an included angle formed by projections of the center lines of the inflow channel 3 and the outflow channel 4 on a vertical plane is 90 degrees or more and less than 180 degrees. Furthermore, the included angle formed by the projection of the central lines of the inflow channel 3 and the outflow channel 4 on the vertical plane can be designed to be more than or equal to 120 degrees and less than or equal to 145 degrees, especially 145 degrees, under the angle, the fluid passing through the inflow channel 3 and the outflow channel 4 is not easy to form blockage, and the flowing openness is ensured. Taking 145 degrees as an example, fig. 2 shows a projection view of the inflow channel 3 and the outflow channel 4 on a vertical plane, fig. 3 is a structure view of a vacuum stop valve when projections of center lines of the inflow channel 3 and the outflow channel 4 on a horizontal plane coincide, and fig. 4 is a structure view of a vacuum stop valve when projections of center lines of the inflow channel 3 and the outflow channel 4 on a horizontal plane do not coincide, that is, fig. 3 and fig. 4 are structure views of a vacuum stop valve of the inflow channel 3 and the outflow channel 4 in two different setting positions, an included angle of the inflow channel 3 and the outflow channel 4 is 145 degrees, which means that an angle formed by projections of center lines of the inflow channel 3 and the outflow channel 4 on a vertical plane is 145 degrees, and projections of center lines of the inflow channel 3 and the outflow channel 4 on a horizontal plane may be coincident straight lines, or intersecting lines, that is, the valve body 1 is internally provided with a hemispherical structure or a structure similar to a hemispherical surface, on the premise of not influencing fluid flow, the inflow channel 3 and the outflow channel 4 can be arranged at any position of the spherical surface, and only the included angle (the projection included angle on the vertical surface) in the vertical direction formed by the inflow channel 3 and the outflow channel 4 is required to be 90-180 degrees.

The partition part 5 of the embodiment is an elastic membrane which is concave upwards and convex downwards in a natural state and is attached to the channel opening of the outflow channel 4 to realize the cut-off of the fluid channel; under the condition that the vacuum negative pressure on the valve cover 2 is connected, the state of the elastic diaphragm is changed from concave-convex to convex-concave and separated from the channel opening of the outflow channel 4, so that the opening of the fluid channel is realized. Preferably, the elastic membrane of the present embodiment is a bowl-shaped structure made of rubber.

In order to obtain a better intercepting effect, the center line of the outflow channel 4 of the present embodiment passes through the lowest point of the partition 5, and the lowest point of the partition 5 is located in the outflow channel 4 in a natural state.

When the included angle between the inflow channel 3 and the outflow channel 4 is designed to be 90 degrees, the partition piece 5 is positioned right above the channel port of the outflow channel 4, and the vacuum negative pressure access port 6 is positioned right above the partition piece 5, so that the uniform stress is ensured, and the partition piece 5 is in close and reliable contact with the channel port of the outflow channel 4.

In order to prevent the upward deformation process of the partition member 5 from exceeding the limit position where the partition member can recover the deformation, a limiting member 7 is added in the present embodiment, the limiting member 7 is disposed between the partition member 5 and the valve cover 2, the limiting member 7 is only used for limiting the partition member 5, and the limiting member 7 does not affect the vacuum negative pressure acting force of the upper space of the partition member 5.

In order to further enhance the contact effect between the partition member 5 and the channel opening of the outflow channel 4, as shown in fig. 5 and 6, in this embodiment, an annular inclined surface 41 may be disposed at the channel opening of the outflow channel 4, a lower side of the annular inclined surface 41 is located on the inner wall of the outflow channel 4, when the partition member 5 recovers deformation and contacts with the channel opening of the outflow channel 4, the partition member 5 is attached to the annular inclined surface 41, and the partition member 5 is closely attached to the channel opening of the annular inclined surface of the outflow channel 4 as shown in fig. 6, so as to ensure that the partition member 5 is closely contacted with the outflow channel 4, ensure air tightness, enhance the firmness and stability of contact, and improve the air tightness of the vacuum stop valve. In addition, in order to further enhance the contact stability and the air tightness, an annular protrusion 51 matched with the annular inclined surface 41 may be further provided on the partition 5, and when the partition 5 is attached to the annular inclined surface 41, the annular protrusion 51 is just clamped at the included angle formed by the partition 5 and the annular inclined surface 41.

As described above, the present invention can be preferably realized.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and the technical essence of the present invention is that within the spirit and principle of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments are all within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a vacuum stop valve, its characterized in that, includes valve body (1) and valve gap (2) that link to each other with valve body (1), be equipped with inflow passageway (3) and outflow passageway (4) that communicate each other on valve body (1), and inflow passageway (3) adopt smooth connection with outflow passageway (4), the passageway department of outflow passageway (4) is provided with can take place deformation cuts off piece (5), cut off the vacuum negative pressure that the upper portion space that piece (5) and valve gap (2) are constituteed passes through valve gap (2) top and inserts mouth (6) and first vacuum source intercommunication, and first vacuum source is used for controlling to cut off opening and closing of piece (5) to outflow passageway (4), outflow passageway (4) and second vacuum source intercommunication, first vacuum source and second vacuum source are same vacuum source or different vacuum sources.

2. A vacuum shut-off valve according to claim 1, characterized in that the angle formed by the projection of the centre lines of the inflow channel (3) and the outflow channel (4) on a vertical plane is greater than or equal to 90 degrees and smaller than 180 degrees.

3. A vacuum shut-off valve according to claim 1, characterized in that the projection of the centre lines of the inflow channel (3) and the outflow channel (4) on a vertical plane forms an angle of 120 degrees or more and 145 degrees or less.

4. A vacuum stop valve according to claim 1, characterized in that the partition (5) is an elastic diaphragm which is concave-convex in nature and fits the passage opening of the outflow passage (4) to block the fluid passage; under the condition that the vacuum negative pressure on the valve cover (2) is connected, the state of the elastic diaphragm is changed from concave-convex to convex-concave and separated from the channel opening of the outflow channel (4), so that the fluid channel is opened.

5. The vacuum shut-off valve as defined in claim 4, wherein said elastic diaphragm is a bowl-shaped structure made of rubber.

6. A vacuum shut-off valve according to claim 1, characterized in that the centre line of the outflow channel (4) passes through the lowest point of the partition (5), and that the lowest point of the partition (5) is located in the outflow channel (4) in the natural state.

7. A vacuum shut-off valve according to claim 6, characterized in that the partition (5) is located directly above the passage opening of the outflow passage (4), and the vacuum negative pressure inlet (6) is located directly above the partition (5).

8. A vacuum shut-off valve according to claim 1, characterized in that it further comprises a stopper (7), said stopper (7) being arranged between the partition (5) and the valve cover (2).

9. A vacuum shut-off valve according to claim 1, characterized in that the passage opening of the outflow channel (4) is provided with an annular bevel (41), the lower side of the annular bevel (41) being located on the inner wall of the outflow channel (4).

10. A vacuum shut-off valve according to claim 9, characterized in that the partition (5) is provided with an annular projection (51) matching the annular chamfer (41).