Energy-saving valve for dry pump

Abstract

The utility model discloses an energy-saving valve for a dry pump, which comprises a valve body, the valve body comprises an inlet end and an outlet end, the inlet end is communicated with an outlet of the dry pump, the outlet end is communicated with the outside, the inlet end and the outlet end can be communicated or cut off through a pressing sheet, and when the air pressure at the inlet end is smaller than a set range value, the pressing sheet is pressed on the inlet end. The inlet end and the outlet end are cut off through the pressing piece, and when the air pressure at the inlet end is larger than a set range value, the pressing piece slides to enable the inlet end and the outlet end to be communicated. The utility model has the advantages of reasonable structure, stable operation and low noise.

Description

Technical Field

[0001] The utility model relates to the technical field of energy saving, in particular to an energy saving valve for a dry pump. Background Art

[0002] A dry pump is also called a dry screw vacuum pump. When the dry pump is working, the volume of the pump chamber changes periodically, from large to small and from small to large. In this way, the opening and closing of the gas channel is used to achieve the pumping effect. In actual work, due to the fluctuation of the amount of gas in the pumped space, the actual power of the dry pump is fluctuating. At the same time, in order to ensure that the gas can be extracted in time, a dry pump with a larger rated power is generally selected, which will cause energy waste and is not conducive to reducing costs. At the same time, due to the fluctuation of the amount of air pumped, vibration will be generated at the outlet of the dry pump, which will cause high noise and is not conducive to smooth operation. Utility Model Content

[0003] The utility model discloses an energy-saving valve for a dry pump, which solves the technical problems of large power consumption and high noise when the dry pump is working in the prior art, and has the technical effects of reasonable structure, stable operation and low noise. The technical scheme adopted is as follows:

[0004] An energy-saving valve for a dry pump comprises a valve body, wherein the valve body comprises an inlet end and an outlet end, wherein the inlet end is connected to the dry pump outlet, and the outlet end is connected to the outside world, and the inlet end and the outlet end can be connected or cut off by a pressing piece. When the air pressure at the inlet end is less than a set range value, the pressing piece cuts off the inlet end and the outlet end, and when the air pressure at the inlet end is greater than the set range value, the pressing piece slides to connect the inlet end and the outlet end.

[0005] Based on the above technical solution, the inlet end and the outlet end are connected vertically, and a spring is connected to the side of the pressing plate close to the outlet end. The spring presses the pressing plate against the annular boss to cut off the outlet end and the inlet end. The annular boss is fixed in the valve body and arranged close to the inlet end.

[0006] On the basis of the above technical solution, it also includes a bracket and a guide column, the bracket is fixed in the valve body, the guide column is sleeved in the spring and its first end is fixed to the pressing plate, and the second end of the guide column passes through the bracket and is slidably connected to the bracket.

[0007] On the basis of the above technical solution, a rubber pad is bonded to the end surface of the pressing sheet facing the annular boss to fit well with the annular boss.

[0008] On the basis of the above technical solution, a vacuum generator is also included, and a first through hole is provided on the side wall of the first chamber formed by the pressing sheet and the inlet end, and the first through hole is connected to the vacuum port of the vacuum generator.

[0009] Based on the above technical solution, a second through hole is provided on the side wall of the second chamber formed by the pressing sheet and the outlet end, the air supply port of the vacuum generator is used to supply compressed nitrogen, and the exhaust port of the vacuum generator is connected to the second through hole.

[0010] On the basis of the above technical solution, a solenoid valve is provided on the air supply pipeline connected to the air supply port of the vacuum generator for adjusting the intake amount of compressed nitrogen.

[0011] On the basis of the above technical solution, the inlet end extends outwardly to form a first pipe joint for connecting to the outlet end of the dry pump, and the outlet end extends outwardly to form a second pipe joint for connecting to the bellows.

[0012] On the basis of the above technical solution, a plurality of annular flanges are formed on the outer wall surface of the second pipe joint to facilitate connection with the corrugated pipe and reduce noise.

[0013] Beneficial Effects

[0014] The utility model has a reasonable structure. The inlet and outlet ends of the valve body are connected or cut off by a pressing piece. When the amount of gas at the dry pump outlet is small, the gas will be accumulated at the inlet end of the valve body. When the set gas pressure is reached, the pressing piece can be pushed to connect the inlet and outlet ends of the valve body. When the exhaust volume at the dry pump outlet is large, the setting of the pressing piece enables the gas to be discharged at a relatively small flow rate at a uniform speed, which can not only compensate for the fluctuation of the gas volume at the dry pump outlet, but also is conducive to the smooth release of the gas and reduces noise.

[0015] In the utility model, the guide column is fixedly connected to the pressing plate and is sleeved in the spring. The pressing plate slides smoothly in the valve body, which is beneficial to ensuring the smooth operation of the energy-saving valve. At the same time, a rubber pad is also provided on the pressing plate, which is beneficial to good isolation of the first chamber and the second chamber in the valve body.

[0016] The utility model also includes a vacuum generator, which uses Bernoulli's principle to generate negative pressure in the first chamber when compressed nitrogen is introduced, thereby ensuring that the pressing plate and the annular boss are tightly fitted, and the first chamber and the second chamber are well isolated, which is conducive to ensuring the smooth operation of the energy-saving valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only one embodiment of the utility model. For ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 : A schematic diagram of the cross-sectional structure of the main view of the utility model;

[0019] Figure 2 : A schematic diagram of the structure of the utility model in top view;

[0020] Figure 3 : A schematic diagram of the three-dimensional structure of the utility model after being assembled with a vacuum generator; DETAILED DESCRIPTION

[0021] The following description and accompanying drawings fully illustrate the specific embodiments of this article so that those skilled in the art can practice them. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. The scope of the embodiments of this article includes the entire scope of the claims, as well as all available equivalents of the claims. Herein, the terms "first", "second", etc. are only used to distinguish one element from another, without requiring or implying any actual relationship or order between these elements. In fact, the first element can also be called the second element, and vice versa. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the structure, device or equipment including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also include elements inherent to such structure, device or equipment. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the structure, device or equipment including the elements. Each embodiment is described in a progressive manner herein, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other.

[0022] The terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. in this document indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this document and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of this document, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, it can also be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] As used herein, the term "plurality" means two or more than two, unless otherwise specified.

[0024] In this document, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0025] In this article, the term "and / or" is a description of the association relationship between objects, indicating that three relationships may exist. For example, A and / or B means: A or B, or, A and B.

[0026] like Figure 1~2 An energy-saving valve for a dry pump is shown, including a valve body 1, which is roughly hollow tubular and includes an inlet end 11 and an outlet end 12, that is, the inlet end 11 and the outlet end 12 are connected from top to bottom, the inlet end 11 extends outward to form a first pipe joint 13 for connecting to the dry pump outlet, and the outlet end 12 extends outward to form a second pipe joint 14, and the outer wall surface of the second pipe joint 14 is formed with a plurality of annular flanges to facilitate connection with a bellows, which can be connected to the outside world or other processing equipment, wherein the bellows has good buffering properties and can reduce vibrations caused by airflow changes.

[0027] like Figure 1 As shown, the inlet end 11 and the outlet end 12 can be connected or cut off through the pressing plate 2. Specifically, the pressing plate 2 is connected to a spring 3 on one side close to the outlet end 12, and further includes a bracket 4 and a guide column 5. The guide column 5 is sleeved in the spring 3 and its first end is fixedly connected to the pressing plate 2. The bracket 4 is fixed in the valve body 1 and is arranged close to the outlet end 12. The second end of the guide column 5 passes through the bracket 4 and is slidably connected to the bracket 4. Under the action of the spring 3, the pressing plate 2 is pressed against the annular boss 15 to cut off the outlet end 11 and the inlet end 12, as shown in FIG. Figure 1 and 2 As shown, the annular boss 15 is fixed in the valve body 1 and arranged close to the inlet end 11; in addition, in order to improve the fit between the pressing piece 2 and the annular boss 15 and better cut off the outlet end 12 and the inlet end 11, a rubber pad is bonded to the end surface of the pressing piece 2 facing the annular boss 15.

[0028] In this way, when the air pressure at the inlet end 11 is less than the set range value, the pressing piece 2 cuts off the inlet end 11 and the outlet end 12. When the air pressure at the inlet end 11 is greater than the set range value, the pressing piece 2 slides to connect the inlet end 11 and the outlet end 12. In this way, when the amount of gas at the dry pump outlet is small, the gas will accumulate at the inlet end 11 of the valve body 1. When the set air pressure is reached, the pressing piece 2 can be pushed to connect the inlet end 11 and the outlet end 12 of the valve body 1; when the exhaust volume at the dry pump outlet is large, the setting of the pressing piece 2 allows the gas to be discharged at a relatively small flow rate at a uniform speed, which can not only compensate for the fluctuation of the dry pump outlet gas volume, so that the actual power of the dry pump is basically consistent with the rated power, achieving energy saving, but also facilitates the smooth release of gas and reduces noise.

[0029] like Figure 3As shown, in other embodiments of the present invention, a vacuum generator 6 is also included. The vacuum generator 6 is a prior art and includes an air supply port 61 , an exhaust port 62 and a vacuum port 63 .

[0030] A first through hole is provided on the side wall of the first chamber formed by the pressing sheet 2 and the inlet end 11 , and the first through hole is communicated with the vacuum port 63 of the vacuum generator 6 .

[0031] A second through hole is provided on the side wall of the second chamber formed by the pressing piece 2 and the outlet end 12. The air supply port 61 of the vacuum generator 6 is used to supply compressed nitrogen, and the exhaust port 62 of the vacuum generator 6 is connected to the second through hole. In this way, when the exhaust volume at the dry pump outlet is small, the vacuum generator 6 can form a negative pressure in the first chamber, so that the pressing piece 2 fits well on the annular boss 15, and the reliable operation of the equipment is achieved. In addition, a solenoid valve (not shown) is provided on the air supply pipeline connected to the air supply port 61 of the vacuum generator 6, which is used to adjust the compressed nitrogen intake volume to adjust the threshold value of the pressing piece 2 to cut off or connect the inlet end 11 and the outlet end 12, which is flexible to use.

[0032] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications based on the present invention belong to the scope of protection required by the present invention.

Claims

1. An energy-saving valve for a dry pump, characterized in that: The valve body comprises a valve body, wherein the valve body (1) comprises an inlet end (11) and an outlet end (12), wherein the inlet end (11) is connected to the dry pump outlet, and the outlet end (12) is connected to the outside, and the inlet end (11) and the outlet end (12) can be connected or cut off through a pressing piece (2); when the air pressure at the inlet end (11) is less than a set range value, the pressing piece (2) cuts off the inlet end (11) and the outlet end (12); when the air pressure at the inlet end (11) is greater than the set range value, the pressing piece (2) slides to connect the inlet end (11) and the outlet end (12); The inlet end (11) and the outlet end (12) are connected vertically, and a spring (3) is connected to a side of the pressing plate (2) close to the outlet end (12). The spring (3) presses the pressing plate (2) against the annular boss (15) to cut off the outlet end (12) and the inlet end (11). The annular boss (15) is fixed in the valve body (1) and is arranged close to the inlet end (11). It also includes a bracket (4) and a guide column (5), wherein the bracket (4) is fixedly arranged in the valve body (1), the guide column (5) is sleeved in the spring (3) and a first end of the guide column (5) is fixedly connected to the pressing plate (2), and a second end of the guide column (5) passes through the bracket (4) and is slidably connected to the bracket (4); The end surface of the pressing sheet (2) facing the annular boss (15) is bonded with a rubber pad so as to fit well with the annular boss (15).

2. The energy-saving valve for a dry pump according to claim 1, characterized in that: It also comprises a vacuum generator (6), and a first through hole is provided on the side wall of the first chamber formed by the pressing sheet (2) and the inlet end (11), and the first through hole is connected to the vacuum port (63) of the vacuum generator (6).

3. The energy-saving valve for a dry pump according to claim 2, characterized in that: A second through hole is provided on the side wall of the second chamber formed by the pressing sheet (2) and the outlet end (12); the gas supply port (61) of the vacuum generator (6) is used to supply compressed nitrogen; and the gas exhaust port (62) of the vacuum generator (6) is connected to the second through hole.

4. The energy-saving valve for a dry pump according to claim 3, characterized in that: A solenoid valve is provided on the air supply pipeline connected to the air supply port (61) of the vacuum generator (6) for adjusting the intake volume of compressed nitrogen.

5. The energy-saving valve for a dry pump according to claim 3 or 4, characterized in that: The inlet end (11) extends outwards to form a first pipe joint (13) for connecting to an outlet end of a dry pump, and the outlet end (12) extends outwards to form a second pipe joint (14) for connecting to a bellows.

6. The energy-saving valve for a dry pump according to claim 5, characterized in that: The outer wall surface of the second pipe joint is formed with a plurality of annular flanges to facilitate connection with the corrugated pipe and reduce noise.

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