Pneumatic control valve group for purging device

Abstract

A pneumatic control valve bank for a purging device solves the problems that in an existing purging system, gas circuits are complex to install, the number of pipe joints is large, and maintenance is inconvenient. The device comprises a valve seat, a plurality of pneumatic logic valves are installed on the valve seat, and a plurality of needle-shaped air cylinders are embedded in the valve seat; the valve seat is provided with a plurality of pipe joints and hole channels which are used for connecting the pneumatic logic valve, the needle-shaped air cylinder and the pipe joints for ventilation. Compared with the prior art, the pneumatic logic valve, the needle-shaped air cylinder, the pipe joints and the like are integrally installed on the valve seat, the structure is compact, the space utilization rate of a purging system is optimized, gas circuit connection is achieved through a hole channel in the valve seat, the number of the joints and the length of a pipeline are reduced, and the system efficiency is improved; the pneumatic logic valve and the needle-shaped air cylinder on the top are convenient to disassemble, assemble and maintain. And the sealing gasket between the valve seat and the fixed seat can absorb vibration, so that noise and air leakage during operation of the system are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic components, in particular to a pneumatic control valve group for a purge device. Background Art

[0002] Current industrial purge systems typically consist of multiple pneumatic reversing valves, pneumatic logic valves, cylinders, and pipe joints. The large number of pipes and joints in existing systems often leads to complex wiring, significant system pressure loss, low space utilization, and inconvenient maintenance, impacting the purge system's operational efficiency and service life. Utility Model Content

[0003] In response to the problems of inconvenient installation of air pipes and numerous joints in the existing technology, the utility model provides a pneumatic control valve group suitable for the purge device. By integrating multiple pneumatic logic valves, needle cylinders and pipe joints on the valve seat, the structure is compact and maintenance is convenient. It can effectively improve the space utilization of the pneumatic system, reduce the number of pipe joints and the matching length, thereby saving costs and simplifying the installation process.

[0004] The utility model solves the above technical problems through the following technical means:

[0005] A pneumatic control valve group for a purge device includes a valve seat with multiple pneumatic logic valves installed on the valve seat; multiple needle cylinders are embedded in the valve seat; multiple pipe joints are provided on the valve seat; and a channel is provided on the valve seat, through which the pneumatic logic valves, needle cylinders and pipe joints are connected.

[0006] Preferably, a plurality of explosion-proof contact switches are installed above the valve seat, and the needle-shaped cylinders correspond to the explosion-proof contact switches one by one; the explosion-proof contact switches are located above the needle-shaped cylinders.

[0007] Preferably, a sheet metal part is installed on the upper end of the valve seat, and a plurality of explosion-proof contact switches are installed on the sheet metal part.

[0008] Preferably, the cylinder body and the air inlet of the needle-shaped cylinder are buried in the valve seat, and air is supplied by the internal channel of the valve seat, and the piston rod is upward.

[0009] Preferably, it further comprises a fixed seat, the valve seat is fixed on the fixed seat, and a sealing gasket is provided between the valve seat and the fixed seat.

[0010] Preferably, the sealing gasket is provided with a through groove corresponding to the hole.

[0011] Preferably, the pneumatic logic valve is one or more of an OR valve, a YES valve, an AND valve, and a NOT valve.

[0012] Compared with the prior art, the present invention has the following benefits:

[0013] - Multiple pneumatic logic valves, needle cylinders, pipe joints, etc. are integrated and installed on the valve seat. The overall structure is compact, which improves the space utilization of the pneumatic system.

[0014] - By opening a channel inside the valve seat, direct connection between each pneumatic logic valve and the needle cylinder is achieved, reducing the number of pipe joints and the matching length, thereby reducing costs.

[0015] - The pneumatic logic valve and needle cylinder are both installed on the top of the valve seat, which is easy to disassemble and maintain.

[0016] - The gasket installed between the valve seat and the fixed seat can absorb vibration, reduce noise and reduce air leakage when the system is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall axial side structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the explosion structure of the valve seat, sealing gasket and fixed seat of the utility model;

[0021] Figure 4 This is a schematic diagram of the valve seat structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the valve seat on the first axis side of the utility model;

[0023] Figure 6 This is a schematic diagram of the second axis side structure of the valve seat of the utility model;

[0024] Figure 7 This is a schematic diagram of the top view of the structure of the utility model;

[0025] Figure 8 This is a gas circuit connection diagram of the utility model;

[0026] In the figure: 1. Valve seat; 2. Pneumatic logic valve; 3. Needle cylinder; 4. Pipe joint; 5. Explosion-proof contact switch; 6. Sheet metal; 7. Fixing seat; 8. Sealing gasket. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 —8 The specific implementation methods of the utility model are further described in detail.

[0028] like Figure 1-8 As shown, a pneumatic control valve group for a purge device includes a pneumatic logic valve 2, a pipe joint 4, a valve seat 1, a sealing gasket 8, a fixing seat 7, a needle cylinder 3, an explosion-proof contact switch 5 and a sheet metal part 6 for fixing the explosion-proof contact switch 5.

[0029] In this embodiment, eight pneumatic logic valves 2 are installed on the top of the valve seat 1, of which six are yes gates, namely L1, L2, L3, L4, L7, and L8, and two are no gates, namely L5 and L6.

[0030] In this embodiment, the pipe joint 4 is installed on the side of the valve seat 1 and is connected to external pneumatic components such as a pressure reducing valve, a pneumatic sensor, a pneumatic visual indicator and the like through an air pipe.

[0031] In this embodiment, there are four needle-shaped cylinders 3 embedded in the valve seat 1, namely C1, C2, C3, and C4. Their piston rods are upward. When the piston rods are extended, they can touch four explosion-proof contact switches 5 installed on the sheet metal 6. Through the explosion-proof contact switches 5, the air pressure signals in the pneumatic system are converted into electrical signals.

[0032] like Figure 7 As shown, the pipe joints 4 at positions P1, P2, P3, and P4 are connected to an external air source for supplying air to the pneumatic logic valve 2; the pipe joints 4 at positions S1, S2, S3, S4, and S5 are connected to an external sensor for providing a pressure signal to the pneumatic logic valve 2.

[0033] like Figure 8 As shown, when the system is running, the three pneumatic logic valves 2, L1, L2, and L3, respectively, act according to the external air pressure signals from S1, S2, and S3, and control the extension of the needle cylinders 3 of C1, C2, and C3; L4 acts after L3 acts, and then pushes L5 to act, cutting off the output of port A1; L6 acts according to the air pressure signal from S5, and if there is no signal, it can continue to supply air to L5; L7 acts according to the signal from L8, and if there is a signal, it pushes the piston rod of the needle cylinder 3C4 to extend; L8 acts according to the air pressure signal from S4, and the air pressure signal is transmitted to L7 only after L3 acts.

[0034] Threaded mounting holes are provided on the side and top surfaces of the valve seat 1 for installing the pipe joint 4 and connecting the valve seat 1 to the air source and pneumatic components through the air pipe. The top surface of the valve seat 1 also has a mounting hole for burying the needle cylinder 3.

[0035] In practical applications, the position, function and quantity of the selected pneumatic logic valve 2, the number of pipe joints 4, needle cylinders 3 and explosion-proof contact switches 5, the size of the valve seat 1 and the shape of the internal channel can be flexibly customized according to the function of the pneumatic system.

[0036] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pneumatic control valve group for a purge device, characterized in that: It comprises a valve seat (1), on which a plurality of pneumatic logic valves (2) are mounted; A plurality of needle-shaped cylinders (3) are embedded in the valve seat (1); The valve seat (1) is provided with a plurality of pipe joints (4); The valve seat (1) is provided with a hole, and the pneumatic logic valve (2), the needle-shaped air pipe and the pipe joint (4) are connected through the hole.

2. A pneumatic control valve group for a purge device according to claim 1, characterized in that: A plurality of explosion-proof contact switches (5) are installed above the valve seat (1), and the needle-shaped cylinders (3) correspond to the explosion-proof contact switches (5) one by one; The explosion-proof contact switch (5) is located above the needle-shaped cylinder (3).

3. The pneumatic control valve group for a purge device according to claim 2, characterized in that: A sheet metal part (6) is mounted on the upper end of the valve seat (1), and a plurality of explosion-proof contact switches (5) are mounted on the sheet metal part (6).

4. The pneumatic control valve group for a purge device according to claim 1, characterized in that: The cylinder body and the air inlet of the needle-shaped cylinder (3) are embedded in the valve seat (1), and air is supplied by the internal channel of the valve seat (1), with the piston rod pointing upward.

5. The pneumatic control valve group for a purge device according to claim 1, characterized in that: It also includes a fixed seat (7), the valve seat (1) is fixed on the fixed seat (7), and a sealing gasket (8) is provided between the valve seat (1) and the fixed seat (7).

6. The pneumatic control valve group for a purge device according to claim 5, characterized in that: The sealing gasket (8) is provided with a through groove corresponding to the hole.

7. The pneumatic control valve assembly for a purge device according to claim 1, characterized in that: The pneumatic logic valve (2) is one or more of an OR valve, a YES valve, an AND valve, and a NOT valve.

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