Reversing valve for vacuum feeding machine

Abstract

The reversing valve for the vacuum feeding machine comprises a valve body, a connecting pipe, a three-way pipe and a middle pipe are formed on the valve body, the connecting pipe is used for being connected with a negative pressure opening of the vacuum feeding machine, a first connector of the three-way pipe is used for being connected with a negative pressure source, and a second connector of the three-way pipe is used for being connected with a next reversing valve or an exhaust pipeline in series. The valve core can be transversely and movably arranged in the middle pipe; the fixed end cover and the pressure relief end cover are arranged at the two ends of the middle pipe respectively; and the driving mechanism is fixed to the fixed end cover, the action end of the driving mechanism is connected with the valve element, and the driving mechanism is used for driving the valve element to transversely move in the middle pipe in a reciprocating mode so that negative-pressure feeding and normal-pressure discharging of the vacuum feeding machine can be achieved. According to the utility model, a plurality of reversing valves can be connected in series, so that a plurality of devices can be connected in parallel, the number of negative pressure sources is reduced, different devices can be switched between negative pressure feeding and normal pressure discharging, and the automation degree and the production efficiency of production are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vacuum feeding machine technical field, concretely, especially, it is about a vacuum feeding machine with reversing valve. BACKGROUND

[0002] With the continuous development of industrial production, the efficiency requirement of material conveying is higher and higher. The vacuum feeding machine can realize automatic and continuous material conveying, which greatly improves the production efficiency. As a key component of the vacuum feeding machine, the performance of the reversing valve directly affects the working efficiency of the whole feeding machine. For example, in the pharmaceutical, food and other industries, the production process needs to quickly and accurately convey materials, and the quick switching and stable work of the reversing valve can ensure the timely supply of materials to meet the production needs.

[0003] In the current vacuum feeding machine, the basic installation method is that a single reversing valve provides the back and forth switching between negative pressure and normal pressure state for a single vacuum feeding machine, so as to facilitate the good material flowability of the material in the normal pressure state, but it cannot realize the linkage demand between multiple vacuum feeding machines, and it is more and more unable to adapt to the technical requirements of social production automation and unmanned. At the same time, this kind of installation method needs to be equipped with a negative pressure source for each vacuum feeding machine, which greatly increases the production cost and the difficulty of later maintenance. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving one of the technical problems existing in the prior art. To this end, the utility model provides a reversing valve for a vacuum feeding machine.

[0005] To achieve the above object, the utility model adopts the following technical scheme: A reversing valve for vacuum feeding machine, include: Valve body, form connecting pipe, three -way pipe and intermediate pipe on the valve body, the connecting pipe with the three -way pipe is arranged in error shaft, the connecting pipe with the three -way pipe is connected through the intermediate pipe, and the intermediate pipe is perpendicular with the connecting pipe and three -way pipe respectively, wherein the connecting pipe is used for connecting with the negative pressure port of vacuum feeding machine, the first interface of three -way pipe is used for connecting with negative pressure source, the second interface of three -way pipe is used for connecting with next reversing valve or exhaust pipe in series;Valve core, be laterally movably arranged in the intermediate pipe;Fixed end cap and pressure relief end cap are arranged at both ends of the intermediate pipe respectively, and the fixed end cap is close to the three -way pipe side, and the pressure relief end cap is close to the connecting pipe side;Driving mechanism, fixed on the fixed end cap, and the action end of the driving mechanism is connected with the valve core, is used for driving the valve core to move laterally in the intermediate pipe, when the valve core moves to the first limit position, the connecting pipe is connected with the three -way pipe, at this time realizes the negative pressure feeding of vacuum feeding machine, when the valve core moves to the second limit position, the communication of the connecting pipe with the three -way pipe is cut off, at this time realizes the atmospheric pressure of vacuum feeding machine The discharge of load;The first limit position is located at the side close to the fixed end cap, and the second limit position is located at the side close to the pressure relief end cap.

[0006] As preferred: still be provided with pressure relief valve in the intermediate pipe, the pressure relief valve is fixed on the pressure relief end cap, and the pressure relief valve adopts mechanical type automatic pressure relief valve, and the top core of the pressure relief valve is connected with the valve core through the thimble.

[0007] As preferred: the fixed end cap and pressure relief end cap are tightly sealed on the intermediate pipe, and its interior is carried out O type sealing treatment.

[0008] As preferred: the valve core is made of polyurethane material.

[0009] As preferred: the driving mechanism adopts linear cylinder.

[0010] The utility model discloses because adopt above technical scheme, it has following advantages:

[0011] The utility model discloses the three -way pipe of T type vent structure is set up on the valve body, can realize the series connection of multiple reversing valves, thereby realizes the parallel connection of multiple vacuum feeding machines, greatly reduces the quantity of negative pressure source, reduces the cost, and simultaneously can realize the switching between the negative pressure feeding and atmospheric pressure of different vacuum feeding machines The discharge of load improves the degree of automation and production efficiency of production. ACCURACY OF DRAWINGS

[0012] Various other advantages and benefits will become apparent to those of ordinary skill in the art, upon reading the following detailed description of the preferred embodiment. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present application. Throughout the drawings, the same reference designates the same elements. In the drawings:

[0013] Figure 1 A structure schematic view of the reversing valve for the vacuum feeding machine provided by an embodiment of the present application. DETAILED DESCRIPTION

[0014] In order to make the objects, technical solutions and advantages of the present application clearer, the specific embodiments of the present application will be further described below with reference to the drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough and complete understanding of the present application and to convey the full scope of the present application to those skilled in the art.

[0015] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0016] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0017] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0018] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium.Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or just indicate that the horizontal height of the first feature is higher than that of the second feature.The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or just indicate that the horizontal height of the first feature is less than that of the second feature.

[0019] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model.In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0020] The reversing valve for vacuum feeding machine provided by the utility model, comprising: valve body, the valve body is formed with connecting pipe, three-way pipe and intermediate pipe, the connecting pipe is used for connecting with the negative pressure port of vacuum feeding machine, the first interface of three-way pipe is used for connecting with negative pressure source, the second interface of three-way pipe is used for connecting with next reversing valve or exhaust pipe;Valve core, the valve core is movably arranged in the intermediate pipe;Fixed end cover and pressure relief end cover are arranged at both ends of the intermediate pipe respectively;Driving mechanism, fixed on the fixed end cover, and the action end of the driving mechanism is connected with the valve core, for driving the valve core to move laterally in the intermediate pipe, to realize the negative pressure feeding and normal pressure discharge of vacuum feeding machine.The utility model can realize the series connection of multiple reversing valves, thereby realizing the parallel connection of multiple devices, not only reducing the number of negative pressure sources, but also realizing the switching between negative pressure feeding and normal pressure discharge of different devices, improving the automation degree and production efficiency of production.

[0021] The following is a detailed description of the reversing valve for the vacuum feeder provided in the embodiments of this utility model, with reference to the accompanying drawings.

[0022] Please see Figure 1 The reversing valve for the vacuum feeder provided in this embodiment includes: a valve body 1, on which a connecting pipe 11, a three-way pipe 12, and an intermediate pipe 13 are formed. The connecting pipe 11 and the three-way pipe 12 are arranged off-axis and connected to each other through the intermediate pipe 13. The intermediate pipe 13 is perpendicular to both the connecting pipe 11 and the three-way pipe 12. The connecting pipe 11 is used to connect to the negative pressure port of the vacuum feeder. The first port of the three-way pipe 12 is used to connect to a negative pressure source (e.g., a vacuum pump), and the second port of the three-way pipe 12 is used to connect in series with the next reversing valve or to an exhaust pipe; a valve core 2, which is laterally movable and disposed within the intermediate pipe 13 of the valve body 1; a fixed end cap 3; and a pressure relief valve. End caps 4 are respectively set at both ends of the intermediate tube 13, with the fixed end cap 3 near the side of the three-way tube 12 and the pressure relief end cap 4 near the side of the connecting tube 11; the drive mechanism 5 is fixed on the fixed end cap 3, and the actuating end of the drive mechanism 5 is connected to the valve core 2, which is used to drive the valve core 2 to move laterally back and forth in the intermediate tube 13. When the valve core 2 is in the first limit position (i.e., near the side of the fixed end cap 3), the connecting tube 11 is connected to the three-way tube 12, and the vacuum feeder is negative pressure feeding at this time. When the valve core 2 is in the second limit position (i.e., near the side of the pressure relief end cap 4), the connection between the connecting tube 11 and the three-way tube 12 is cut off, and the vacuum feeder is normal pressure discharging at this time.

[0023] In the above embodiment, preferably, a pressure relief valve 6 is also provided inside the intermediate tube 13. The pressure relief valve 6 is fixed on the pressure relief end cover 4, and the pressure relief valve 6 is a mechanical automatic pressure relief valve. The top core of the pressure relief valve 6 is connected to the valve core 2 through the ejector pin 7. When the valve core 2 is in the second limit position, the ejector pin 7 pushes the top core of the pressure relief valve 6 to the open state, thereby connecting the pressure relief valve 6 to the atmosphere, thus ensuring the normal pressure state when the vacuum feeder is not working, facilitating material conveying; when the valve core 2 is in the first limit position, the top core of the pressure relief valve 6 is reset under the action of the spring, achieving the effect of sealing the valve body 1.

[0024] In the above embodiments, preferably, both the fixed end cap 3 and the pressure relief end cap 4 are pressed and sealed onto the intermediate tube 13 by screws or bolts, etc., using a conventional structure for fixing, reducing maintenance costs. At the same time, their internal O-ring sealing treatment ensures the sealing effect and reduces pressure loss.

[0025] In the above embodiments, preferably, the valve core 2 is made of polyurethane material. Polyurethane material has a certain hardness and wear resistance, which can not only effectively seal the valve body 1, but also has stable chemical properties and a long service life.

[0026] In the above embodiment, preferably, the driving mechanism 5 adopts a linear cylinder, which is low in cost, various in specifications and convenient to purchase.

[0027] The reversing valve for the vacuum feeding machine has the following working principle when in use:

[0028] In the negative pressure feeding stage, the driving mechanism 5 pushes the valve core 2 to move to the first limit position, so that the connecting pipe 11 on the valve body 1 is in communication with the negative pressure source, the vacuum feeding machine generates negative pressure, and under the action of the pressure difference, the material is sucked into the bin of the vacuum feeding machine.

[0029] When the feeding is completed and the material needs to be discharged, the driving mechanism 5 acts again to push the valve core 2 to move to the second limit position, thereby cutting off the communication between the negative pressure source and the connecting pipe 11, and at the same time, the pressure relief valve 6 is in communication with the external atmosphere, so that the bin of the vacuum feeding machine is in a normal pressure state, and the material in the bin is discharged under the action of gravity.

[0030] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A reversing valve for a vacuum loader, characterized by, The utility model relates to a valve for vacuum feeding machine, comprising: a valve body, a connecting pipe, a tee pipe and an intermediate pipe are formed on the valve body, the connecting pipe is arranged in a skew axis with the tee pipe, the connecting pipe and the tee pipe are communicated through the intermediate pipe, and the intermediate pipe is perpendicular to the connecting pipe and the tee pipe respectively, wherein the connecting pipe is used for connecting with a negative pressure port of a vacuum feeding machine, a first interface of the tee pipe is used for connecting with a negative pressure source, and a second interface of the tee pipe is used for connecting with a next reversing valve in series or an exhaust pipe; a valve core is movably arranged in the intermediate pipe; a fixed end cover and a pressure relief end cover are arranged at two ends of the intermediate pipe respectively, and the fixed end cover is close to the tee pipe, and the pressure relief end cover is close to the connecting pipe; a driving mechanism is fixed on the fixed end cover, and an action end of the driving mechanism is connected with the valve core, and the driving mechanism is used for driving the valve core to move transversely and reciprocally in the intermediate pipe, when the valve core moves to a first limit position, the connecting pipe is communicated with the tee pipe, and at this time, vacuum feeding of the vacuum feeding machine is realized, when the valve core moves to a second limit position, the communication between the connecting pipe and the tee pipe is cut off, and at this time, normal pressure discharging of the vacuum feeding machine is realized; the first limit position is located close to the fixed end cover, and the second limit position is located close to the pressure relief end cover.

2. The diverter valve for a vacuum loader according to claim 1, wherein A pressure relief valve is further arranged in the intermediate pipe, the pressure relief valve is fixed on the pressure relief end cover, and the pressure relief valve is a mechanical automatic pressure relief valve, and a top core of the pressure relief valve is connected with the valve core through a plunger.

3. The diverter valve for a vacuum loader of claim 1, wherein, The fixed end cover and the pressure relief end cover are tightly sealed on the intermediate pipe, and the inside is treated by O sealing.

4. The diverter valve for a vacuum loader of claim 1, wherein, The valve core is made of polyurethane material.

5. The diverter valve for a vacuum loader of claim 1, wherein, The driving mechanism is a linear cylinder.

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