Low-vacuum canning change-over valve

Abstract

The utility model relates to the field of change-over valves, and discloses a low-vacuum canning change-over valve which comprises an upper valve seat and a lower valve seat, the bottom end of the upper valve seat is fixedly connected with the lower valve seat, a valve opening disc is installed at the top end of the lower valve seat, a valve rod is assembled in the valve opening disc, and the valve rod penetrates through the valve opening disc and abuts against the top of the upper valve seat. A large vacuum pipe is arranged on the right side of the upper valve seat, and a small vacuum pipe is arranged at the rear end of the large vacuum pipe. According to the low-vacuum canning change-over valve, the large vacuum pipe and the small vacuum pipe are arranged, the exhaust function of the change-over valve can efficiently release vacuum in a tank after filling is completed, residual vacuum in the tank is rapidly broken through the small vacuum pipe, and the situation that the vacuum state causes too large pressure influence on the valve body and a container is avoided; the valve is kept in a stable working state in the high-frequency opening and closing process, the material backflow condition does not exist in the exhaust process, the problem that vacuum delay is likely to be generated in the exhaust process of the change-over valve is solved, and the vacuum backlash phenomenon in the exhaust process is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a conversion valve technical field, concretely is a kind of low vacuum canning conversion valve. BACKGROUND

[0002] The conversion valve is a device for controlling the flow direction of fluid or gas, and its basic working principle is to switch the communication state of the pipeline by rotating or sliding the valve core to realize the functions of vacuum extraction, filling, exhaust and closing.

[0003] The existing low vacuum canning conversion valve on the market has the exhaust stage, when the switching of large vacuum pipe and small vacuum pipe is not timely or the sealing is not strict, the residual vacuum in the tank may be reversed into the material pipeline due to the pressure difference, causing material backflow or leakage. Under the operation of traditional conversion valve at high frequency, the sealing element is easy to wear, which further aggravates the vacuum backflush phenomenon. This defect not only reduces the canning efficiency, but also may cause excessive pressure impact on the tank and valve, affecting the service life of the equipment.

[0004] Therefore, a low vacuum canning conversion valve is needed to solve the above technical defects. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of low vacuum canning conversion valve to solve the problem of easy vacuum delay and cause vacuum backflush phenomenon in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of low vacuum canning conversion valve, including upper valve seat and lower valve seat, the lower valve seat is fixedly connected at the bottom of the upper valve seat, the lower valve seat top is installed with valve disc, the valve disc is assembled with valve stem inside, the valve stem passes through valve disc and is in contact with the top of upper valve seat, the right side of upper valve seat is provided with large vacuum pipe, the rear end of large vacuum pipe is provided with small vacuum pipe, large vacuum pipe and small vacuum pipe are communicated with the bottom of valve disc respectively, the top of valve stem is fixedly sleeved with rotating block.

[0007] As a further technical scheme of the utility model, the top of rotating block is fixedly connected with lower valve opening block, the top of lower valve opening block is fixedly assembled with upper valve opening block, the valve stem and rotating block are fixedly connected with valve block lock plate.

[0008] As a further technical scheme of the utility model, the left side of the top of valve disc is provided with material inlet, and the large vacuum pipe and the small vacuum pipe are connected to vacuum pump pipeline respectively.

[0009] As a further technical scheme of the utility model, the outer wall of valve disc is embedded with first O ring at the connection with upper valve seat, and the connection between upper valve seat and lower valve seat is embedded with second O ring.

[0010] As a further technical scheme of the utility model, the lower valve seat bottom end is fixedly connected with a first inner hexagonal screw and a second inner hexagonal screw, and the lower valve seat and the upper valve seat are fixedly connected through the first inner hexagonal screw and the second inner hexagonal screw.

[0011] As a further technical scheme of the utility model, the opening valve disc is a copper material member, and the rotating block is made of polyethylene material.

[0012] Compared with the prior art, the utility model has the beneficial effects that: the low vacuum canning conversion valve not only prevents vacuum backflushing phenomenon in the exhaust process, realizes no leakage under high negative pressure condition, but also avoids operation interruption and keeps stability in vacuum;

[0013] (1) through being provided with a large vacuum pipe and a small vacuum pipe, the exhaust function of the conversion valve can efficiently release the vacuum in the tank after filling is completed, the residual vacuum in the tank is quickly broken through the small vacuum pipe, the excessive pressure influence of the vacuum state on the valve body and the container is avoided, the valve keeps stable working state in the high-frequency opening and closing process, there is no material backflow during exhaust, the problem that the conversion valve is prone to vacuum delay during exhaust is solved, and the vacuum backflushing phenomenon in the exhaust process is prevented;

[0014] (2) through being provided with an upper valve seat, an opening valve disc, a valve rod, a large vacuum pipe and a small vacuum pipe, the vacuum extraction function of the conversion valve can realize efficient vacuum treatment, prevents leakage under high negative pressure condition, solves the problem of insufficient sealing performance of the existing conversion valve during vacuum extraction, improves the operation precision and efficiency of low vacuum canning, guarantees the purity of the material, and avoids the influence of insufficient vacuum on subsequent filling and product quality;

[0015] (3) through being provided with an upper valve seat, an opening valve disc, a rotating block, a lower opening valve block and an upper opening valve block, the filling function of the conversion valve can continuously operate under the vacuum keeping state, the material is quickly injected, and it is ensured that filling is completed in the vacuum environment, meanwhile, the position of the rotating block is fixed through the valve block lock plate, the rotating block can be quickly switched to the exhaust gear after filling is completed, operation interruption is avoided, the problem that the existing low vacuum canning conversion valve keeps unstable vacuum during filling is solved, and the filling efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view sectional structure schematic view of the utility model;

[0017] Figure 2 It is a rear view sectional structure schematic view of the utility model;

[0018] Figure 3 It is a pipeline switching schematic view of the utility model;

[0019] Figure 4The utility model discloses a front view structure schematic diagram.

[0020] In the drawing: 1, upper valve seat; 2, lower valve seat; 3, open valve disc; 4, valve rod; 5, rotating block; 6, lower open valve block; 7, upper open valve block; 8, large vacuum pipe; 9, small vacuum pipe; 10, first O ring; 11, second O ring; 12, first inner hexagonal screw; 13, second inner hexagonal screw; 14, valve block locking plate. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] Please refer to Figures 1-4 , the utility model provides an embodiment: a low vacuum canning conversion valve, including upper valve seat 1 and lower valve seat 2, upper valve seat 1 bottom fixedly connected with lower valve seat 2, lower valve seat 2 top end is installed with open valve disc 3, and open valve disc 3 is equipped with valve rod 4 inside, and valve rod 4 penetrates open valve disc 3 and is in contact with upper valve seat 1 top, and upper valve seat 1 right side is provided with large vacuum pipe 8, and large vacuum pipe 8 rear end is provided with small vacuum pipe 9, and large vacuum pipe 8 and small vacuum pipe 9 are communicated with open valve disc 3 bottom end respectively, and valve rod 4 top end is fixedly sleeved with rotating block 5, and rotating block 5 top end is fixedly connected with lower open valve block 6, and lower open valve block 6 top end is fixedly assembled with upper open valve block 7, and valve rod 4 and rotating block 5 are fixedly connected with valve block locking plate 14 between, and open valve disc 3 top end left side is provided with material inlet, and large vacuum pipe 8 and small vacuum pipe 9 are connected to vacuum pump pipeline respectively;

[0023] Specifically, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 indicated, when the valve is rotated to exhaust position, open valve disc 3 is communicated with small vacuum pipe 9, and large vacuum pipe 8 is closed at the same time, and the residual vacuum in the tank is quickly broken through small vacuum pipe 9, avoids the influence of vacuum state to valve body and container, and the valve maintains stable working state in the process of high-frequency opening and closing, and there is no material backflow when exhausting.

[0024] First O ring 10 is embedded at the junction of the outer wall of open valve disc 3 and upper valve seat 1, second O ring 11 is embedded at the junction of upper valve seat 1 and lower valve seat 2, first inner hexagonal screw 12 and second inner hexagonal screw 13 are fixedly connected at the bottom end of lower valve seat 2, and lower valve seat 2 and upper valve seat 1 are fixedly connected through first inner hexagonal screw 12 and second inner hexagonal screw 13;

[0025] Specifically, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , when the valve is rotated to the vacuumizing position, the large vacuum pipe 8 starts to vacuumize the internal container, and the small vacuum pipe 9 keeps the small passage closed, ensuring that the vacuumizing efficiency is concentrated on the large vacuum pipe 8, so as to quickly reach the target vacuum degree. During the vacuumizing process, the first O-ring 10 and the second O-ring 11 form a multiple sealing structure to prevent leakage under high negative pressure.

[0026] The valve disc 3 is a copper material member, and the rotating block 5 is made of polyethylene material;

[0027] Specifically, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 Figure 1 Figure 2 Figure 3 Figure 4 , when the valve is rotated to the filling position, the large vacuum pipe 8 keeps the small flow vacuumizing state, and the material is quickly injected to ensure that the filling is completed in a vacuum environment. At the same time, the position of the rotating block 5 is fixed by the valve block locking plate 14, and after the filling is completed, it can be quickly switched to the exhaust position to avoid operation interruption.

[0028] Working principle: the valve is divided into four positions, which are, in turn, vacuumizing the container to ensure vacuumizing, filling while switching to small vacuumizing passage, exhausting to break the vacuum, facilitating the product to separate from the valve, and closing the valve without opening the valve when there is no container. First, rotate to the vacuumizing position, drive the valve stem 4 to drive the valve disc 3 to communicate with the large vacuum pipe 8, start the vacuum pump to vacuumize the large vacuum pipe 8, and stop vacuumizing when the target vacuum is reached. Rotate to the filling position, inject the material through the valve disc 3, and keep the small flow vacuumizing of the small vacuum pipe 9 at the same time. After the filling is completed, switch to the exhaust position. Rotate to the exhaust position, release the vacuum by communicating the material with the small vacuum pipe 9, close the small passage of the large vacuum pipe 8, and switch to the valve closing position after confirming that the exhaust is completed.

[0029] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but rather can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and range of equivalents of the claims are intended to be embraced therein. Any reference signs in the claims should not be considered as limiting the claims involved.

Claims

1. A low-vacuum filling switching valve, comprising an upper valve seat (1) and a lower valve seat (2), characterized in that: The lower valve seat (2) is fixedly connected to the bottom end of the upper valve seat (1). The valve opening disc (3) is installed at the top end of the lower valve seat (2). A valve stem (4) is assembled inside the valve opening disc (3). The valve stem (4) passes through the valve opening disc (3) and abuts against the top of the upper valve seat (1). A large vacuum tube (8) is provided on the right side of the upper valve seat (1). A small vacuum tube (9) is provided at the rear end of the large vacuum tube (8). The large vacuum tube (8) and the small vacuum tube (9) are respectively connected to the bottom end of the valve opening disc (3). A rotating block (5) is fixedly sleeved at the top end of the valve stem (4).

2. The low-vacuum filling switching valve according to claim 1, characterized in that: The top of the rotating block (5) is fixedly connected to a downward opening valve block (6), and the top of the downward opening valve block (6) is fixedly assembled with an upward opening valve block (7). A valve block locking plate (14) is fixedly connected between the valve stem (4) and the rotating block (5).

3. The low-vacuum filling conversion valve according to claim 1, characterized in that: The valve opening disc (3) has a material inlet on the top left side, and the large vacuum tube (8) and small vacuum tube (9) are respectively connected to the vacuum pump pipeline.

4. A low-vacuum filling switching valve according to claim 1, characterized in that: A first O-ring (10) is embedded at the connection between the outer wall of the valve disc (3) and the upper valve seat (1), and a second O-ring (11) is embedded at the connection between the upper valve seat (1) and the lower valve seat (2).

5. A low-vacuum filling conversion valve according to claim 1, characterized in that: The lower valve seat (2) is fixedly connected to the bottom end with a first hexagon socket screw (12) and a second hexagon socket screw (13), and the lower valve seat (2) and the upper valve seat (1) are fixedly connected by the first hexagon socket screw (12) and the second hexagon socket screw (13).

6. A low-vacuum filling conversion valve according to claim 1, characterized in that: The valve opening disc (3) is made of copper, and the rotating block (5) is made of polyethylene.

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