Split type pneumatic control valve

Abstract

A split type pneumatic control valve belongs to the technical field of pneumatic control and is composed of a main valve body, an auxiliary valve body, an airflow connector, a valve cover and an executing mechanism. The main valve body and the auxiliary valve body are detachably connected and combined together to form a complete airflow channel, and the executing mechanism makes contact with or is separated from the valve seat under the action of an external air compressor, so that opening and closing control between the main channel and the auxiliary channel is achieved. The main valve body and the auxiliary valve body are convenient to mount and dismount, the flexibility and maintainability of equipment are improved, the valve can be independently machined and maintained, replacement and maintenance are convenient, the maintenance cost is reduced, and the valve can adapt to different application scenes and airflow requirements.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pneumatic control technical field relates to a pneumatic control valve, specifically speaking relates to a split type pneumatic control valve. BACKGROUND

[0002] Sand blasting belongs to the common process of metal parts surface treatment, namely using compressed air as power, to form high-speed jet beam to high-speed spray (copper sand, quartz sand, emery, iron sand, sea sand, etc.) to the workpiece surface to be handled, make the workpiece surface or shape change. Due to the impact and cutting action of abrasive to the workpiece surface, the surface of the workpiece obtains certain cleanliness and different roughness, and the mechanical properties of the workpiece surface are improved, so as to improve the fatigue resistance of the workpiece, increase the adhesion between the workpiece and the coating, prolong the durability of the coating, facilitate the leveling and decoration of the coating.

[0003] Since sand blasting process needs to accurately control the abrasive spraying intensity through high-pressure airflow, pneumatic control valve needs to be used, however, in the existing pneumatic control system, the traditional pneumatic control valve is mostly of integral structure, this structure can meet the basic control requirements to a certain extent, but in actual application, there are the following shortcomings: (1) the sealing performance of the pneumatic control valve is not good, the pressure loss is serious, which reduces the intensity of sand blasting, thereby affecting the effect of sand blasting; (2) the traditional pneumatic control valve is mostly of integral structure, when a certain component of the control valve fails, the entire control valve needs to be disassembled and repaired, the disassembly process is difficult, which easily leads to the wire slipping at the interface of the main pipeline, and the deformation of the valve stem and valve plug, thereby causing the damage of the entire pneumatic control valve, which cannot be used continuously, which not only increases the maintenance cost and time, but also is difficult to meet the needs of complex and changeable industrial application scenarios. CONTENT OF THE UTILITY MODEL

[0004] The utility model in the prior art discloses a split type pneumatic control valve in view of the deficiencies of the traditional integral pneumatic control valve in the use process, to solve the problem that the traditional pneumatic control valve is inconvenient to maintain and lacks flexibility, to further meet the needs of multiple application scenarios.

[0005] The split type pneumatic control valve provided by the application adopts the following technical scheme:

[0006] The split type pneumatic control valve comprises:

[0007] A main valve body, which is internally provided with a main channel, and a valve seat is arranged in the middle of the main channel, and the two ends of the main channel are connected with pipelines respectively;

[0008] A secondary valve body, which is internally provided with a secondary channel, and is detachably connected with the main valve body;

[0009] An air flow joint is arranged on the auxiliary valve body and communicates with the auxiliary channel;

[0010] A valve cover is connected to the top of the auxiliary valve body;

[0011] An actuator is connected between the main channel and the auxiliary channel and controls the opening and closing of the main channel and the auxiliary channel under the action of an external air compressor.

[0012] By adopting the above technical scheme, the main valve body and the auxiliary valve body are combined together through detachable connection to form a complete air flow channel, and the actuator is in contact or separated from the valve seat under the action of the external air compressor, so that the opening and closing control of the main channel and the auxiliary channel is realized. The main valve body and the auxiliary valve body are easy to install and disassemble, improve the flexibility and maintainability of the equipment, can be individually processed and maintained, are easy to replace and repair, reduce the maintenance cost, and can adapt to different application scenarios and air flow requirements.

[0013] Further, the main valve body and the auxiliary valve body are connected through external thread and internal thread, and a first sealing ring is arranged at the connection.

[0014] By adopting the above technical scheme, the main valve body and the auxiliary valve body are connected through thread, which is easy to install and disassemble, is convenient for on-site installation and maintenance, and has good connection reliability and sealing performance; the arrangement of the first sealing ring effectively prevents air flow from leaking at the connection, ensures the sealing performance of the pneumatic control valve, and improves the working efficiency and reliability of the pneumatic control valve.

[0015] Further, the actuator is composed of a spring, a valve rod, a first piston, a second piston and a nut; the first piston is sleeved on the upper end of the valve rod and locked by the nut, and the first piston slides in the auxiliary channel; the second piston is sleeved on the lower end of the valve rod and locked by the nut, and the second piston acts on the main channel and forms opening and closing connection with the valve seat; the spring is connected between the first piston and the valve cover.

[0016] By adopting the above technical scheme, under the action of the external air compressor, the air flow enters the auxiliary channel, pushes the first piston to move upward, drives the second piston to move upward through the valve rod, separates the second piston from the valve seat, and connects the main channel with the auxiliary channel. When the air flow stops being supplied, the elastic force of the spring pushes the first piston and the second piston to move downward, so that the second piston contacts the valve seat and the air flow channel is closed. The components are tightly connected, the overall structure is compact, the occupied space is small, and the opening and closing control of the main channel and the auxiliary channel is accurately realized. The components are locked by the nut, which is convenient for disassembly and replacement, and reduces the maintenance cost.

[0017] Further, the bottom surface of the second piston is provided with a second sealing ring.

[0018] By adopting the technical scheme, the second sealing ring is arranged on the bottom surface of the second piston, the sealing performance of the pneumatic control valve is further improved, when the second piston contacts the valve seat, the second sealing ring can tightly fit the valve seat, the airflow leakage between the second piston and the valve seat is prevented, and the working efficiency and reliability of the pneumatic control valve are improved.

[0019] Further, the spring is a compression spring.

[0020] By adopting the technical scheme, the compression spring is compressed under the action of external force, when the external force disappears, the spring restores to the original state, the elastic force is generated, the first piston and the second piston are pushed to move downward, and the airflow passage is closed. The elastic force of the compression spring is stable, the reliability and stability of the pneumatic control valve can be ensured. The compression spring has simple structure and is easy to process and install.

[0021] Further, the top of the valve cover is provided with a silencer.

[0022] By adopting the technical scheme, the silencer is arranged on the top of the valve cover, the noise during the working of the pneumatic control valve is reduced, and the working environment is improved.

[0023] In summary, the utility model has at least one of the following beneficial technical effects:

[0024] (1) Convenient maintenance: since the split structure is adopted, when a component fails, only the corresponding component needs to be replaced, the entire control valve does not need to be disassembled and maintained, the equipment downtime is reduced, and the maintenance cost and time are greatly reduced.

[0025] (2) High flexibility: the split structure enables the control valve to flexibly replace or upgrade components according to different application scenarios and requirements, and improves the adaptability and expandability of the control valve.

[0026] (3) High reliability: the independence between components improves the reliability of the entire control valve system, two sealing rings are arranged between the main valve body and the auxiliary valve body, airflow leakage is effectively prevented, the sealing performance of the pneumatic control valve is improved, airflow leakage is reduced, and the working efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a whole structure schematic view of the split pneumatic control valve of the utility model.

[0028] Figure 2 It is an internal structure schematic view of the split pneumatic control valve of the utility model.

[0029] Figure 3This is a schematic diagram of the secondary valve body in this utility model.

[0030] Figure 4 This is a schematic diagram of the main valve body in this utility model.

[0031] In the diagram: 1. Main valve body; 2. Sub-valve body; 3. Airflow connector; 4. Valve cover; 5. Silencer; 6. Spring; 7. Valve stem; 8. First piston; 9. Second piston; 10. Nut; 11. First sealing ring; 12. External thread; 13. Second sealing ring; 14. Main interface; 15. Internal thread; 16. First pipe interface; 17. Second pipe interface; 18. Valve seat. Detailed Implementation

[0032] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0033] Example 1

[0034] like Figures 1-4 As shown, the split-type pneumatic control valve consists of a main valve body 1, a secondary valve body 2, an airflow connector 3, a valve cover 4, and an actuator. The main valve body 1 has a main channel with a valve seat 18 in the middle. Both ends of the main channel are connected to pipelines. The secondary valve body 2 has a secondary channel, which is screwed onto the main valve body 1 via external threads 12 and internal threads 15, with a first sealing ring 12 at the connection. The airflow connector 3 is located on the secondary valve body 2 and communicates with the secondary channel. The valve cover 4 is connected to the top of the secondary valve body 2. The actuator consists of a spring 6, a valve stem 7, a first piston 8, a second piston 9, and a nut 10. The first piston 8 is fitted onto the upper end of the valve stem 7 and locked by the nut 10, sliding within the secondary channel. The second piston 9 is fitted onto the lower end of the valve stem 7 and locked by the nut 10, moving up and down within the main channel and forming an opening and closing connection with the valve seat 18. The spring 6 is connected between the first piston 8 and the valve cover 4.

[0035] like Figure 2 As shown, the working principle of this embodiment is as follows: An external air compressor supplies air to the secondary channel through the airflow connector 3. The airflow pushes the first piston 8 upward, which in turn drives the second piston 9 upward via the valve stem 7. The second piston 9 separates from the valve seat 18, connecting the main channel and the secondary channel, allowing airflow to pass through both. When the external air compressor stops supplying air, the elastic force of the spring 6 pushes the first piston 8 and the second piston 9 downward. The second piston 9 contacts the valve seat 18, closing the airflow passage between the main channel and the secondary channel.

[0036] Example 2

[0037] Unlike the above-mentioned Example 1, in order to effectively reduce the noise generated by the pneumatic control valve when it is working, and to improve the working environment, a muffler 5 is arranged on the top of the valve cover 4 in this example, as shown in Figures 1-3 The muffler 5 is screwed with the valve cover 4, and the model of the muffler 5 is SLM-03 flat head muffler. The external air compressor supplies air to the secondary channel through the air flow joint 3, pushing the first piston 8 and the second piston 9 to move upwards, opening the air flow channel. The muffler 5 absorbs the noise generated when the air flows through, reducing the noise pollution in the working environment. When the external air compressor stops supplying air, the spring 6 pushes the first piston 8 and the second piston 9 to move downwards, closing the air flow channel. The muffler 5 continues to absorb noise during the closing process, ensuring a quiet working environment.

[0038] Example 3

[0039] Unlike the above-mentioned Example 1, in order to improve the sealing performance of the pneumatic control valve, reduce air leakage, and improve work efficiency and reliability, a second sealing ring 13 is arranged on the bottom surface of the second piston 9 in this example, as shown in Figures 2-3 The external air compressor supplies air to the secondary channel through the air flow joint 3, pushing the first piston 8 and the second piston 9 to move upwards, opening the air flow channel. The second sealing ring 13 prevents air leakage from the gap when the second piston 9 separates from the valve seat 18. When the external air compressor stops supplying air, the spring 6 pushes the first piston 8 and the second piston 9 to move downwards, closing the air flow channel. The second sealing ring 13 ensures the sealing performance and prevents air leakage when the second piston 9 contacts the valve seat 18.

Claims

1. A split pneumatic control valve, characterized in that The split type pneumatic control valve comprises: a main valve body (1) internally provided with a main channel, a valve seat (18) arranged in the middle of the main channel, and two ends of the main channel connected with pipelines respectively; a sub valve body (2) internally provided with a sub channel and detachably connected with the main valve body (1); an air flow connector (3) arranged on the side of the sub valve body (2) and communicated with the sub channel; a valve cover (4) connected and arranged on the top of the sub valve body (2); an actuator connected and arranged between the main channel and the sub channel, and realizing opening and closing control between the main channel and the sub channel under the action of an external air compressor.

2. The split-pneumatic control valve according to claim 1, characterized in that: The main valve body (1) and the sub valve body (2) are connected by external thread (12) and internal thread (15) screwing, and a first sealing ring (11) is arranged at the connecting position.

3. The split-pneumatic control valve according to claim 1, characterized in that: The actuator is composed of a spring (6), a valve rod (7), a first piston (8), a second piston (9) and a nut (10); the first piston (8) is sleeved on the upper end of the valve rod (7) and locked by the nut (10), and the first piston (8) slides in the sub channel; the second piston (9) is sleeved on the lower end of the valve rod (7) and locked by the nut (10), and the second piston (9) acts on the main channel upward and downward and forms opening and closing connection with the valve seat (18); the spring (6) is connected and arranged between the first piston (8) and the valve cover (4).

4. The split-pneumatic control valve according to claim 3, characterized in that: The bottom surface of the second piston (9) is provided with a second sealing ring (13).

5. The split-pneumatic control valve according to claim 3, characterized in that: The spring (6) is a compression spring.

6. The split-pneumatic control valve according to claim 1, characterized in that: The top of the valve cover (4) is provided with a silencer (5).

Images