Pneumatic ball valve made of all-plastic material

Abstract

The utility model discloses an all-plastic pneumatic ball valve, and relates to the technical field of self-control valves. The check valve comprises a valve body, a support is fixed on the upper portion of the valve body, the top of the support is fixedly communicated with an air cylinder, a limit switch is fixedly installed on the top of the air cylinder, and an installation mechanism convenient to install is arranged on the valve body. Due to the fact that the valve body, the support, the air cylinder and the limiting switch are all made of plastic materials, the anti-corrosion valve has a good anti-corrosion function in a corrosive environment, the failure rate is reduced, the service life of the valve is prolonged, cost is saved for enterprise production, the installation mechanism is arranged, the valve body can be rapidly and stably installed under various working conditions, and the service life of the valve is prolonged. The installation time and labor cost are greatly reduced, and the working efficiency is improved; when the valve needs to be overhauled or replaced, the valve can be disassembled and reinstalled more quickly, the downtime is shortened, and the operation efficiency of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic control valves, and particularly relates to a pneumatic ball valve made of all-plastic materials. Background Technique

[0002] Pneumatic ball valves are very widely used, such as in petroleum, chemical industry, and people's daily life. Currently, all walks of life use them to open and close the flow direction of fluids. Because of the simple structural design of pneumatic ball valves, using gas as the power source, they open and close quickly and the fluid is less resistant, making them very convenient to use and maintain. The various advantages of pneumatic ball valves make them widely used in life.

[0003] For pneumatic plastic ball valves, the valve body is made of plastic, but many cylinders, brackets or limit switches are made of metal. In a strongly corrosive acidic environment, brackets, cylinders or limit switches are easily corroded and damaged, resulting in a short service life of the valve and increasing the maintenance cost. Therefore, this application document provides a pneumatic ball valve made of all-plastic materials. Content of the Utility Model

[0004] The utility model specifically adopts the following technical solutions to achieve the above purposes:

[0005] A pneumatic ball valve made of all-plastic materials, including a valve body, a bracket is fixedly installed on the upper part of the valve body, a cylinder is fixedly connected and communicated at the top of the bracket, a limit switch is fixedly installed at the top of the cylinder, and an installation mechanism for convenient installation is arranged on the valve body.

[0006] Further, the installation mechanism includes a threaded pipe fixedly connected and communicated on the valve body, a sealing gasket is placed at the other end of the threaded pipe, an installation pipe is threadedly connected to the threaded pipe, and an installation head is fixedly connected and communicated at the other end of the installation pipe.

[0007] Further, a connecting bolt is threadedly connected to the installation head, the connecting bolt sequentially penetrates through the installation head and the valve body, and a connecting nut is threadedly connected to the other end of the connecting bolt.

[0008] Further, a first bolt is fixedly installed between the valve body and the bracket.

[0009] Further, a second bolt is fixedly installed between the bracket and the cylinder.

[0010] Further, a third bolt is fixedly installed between the cylinder and the limit switch.

[0011] Further, the valve body is made of PVDF plastic material.

[0012] Further, the bracket is made of PA plastic material.

[0013] Furthermore, the cylinder is made of PA plastic material.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. In the present utility model, the valve body, bracket, cylinder, and limit switch are all made of plastic material, which has good anti-corrosion function in a corrosive environment, reduces the failure rate, increases the service life of the valve, and saves costs for enterprise production.

[0016] 2. By setting the limit switch in the present utility model, the opening and closing state of the valve can be accurately displayed; when the valve is closed, the red cam presses the upper microswitch spring piece, and the normally open point closes, and the closed-in-place signal is sent to the PLC; when the valve is fully open, the yellow cam presses the lower microswitch spring piece, and the normally open point closes, and the open-in-place signal is sent to the PLC. This design enables the operator to remotely monitor the state of the valve and improves the automation level of the system.

[0017] 3. The present utility model is provided with an installation mechanism, enabling the valve body to be quickly and firmly installed under various working conditions, greatly reducing the installation time and labor costs, and improving work efficiency; when it is necessary to repair or replace the valve, it can be disassembled and reinstalled more quickly, reducing the downtime and improving the operation efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0019] Figure 2 is a three-dimensional structural schematic diagram of the present utility model from another angle;

[0020] Figure 3 is a three-dimensional structural schematic diagram of the installation mechanism of the present utility model;

[0021] Figure 4 is a three-dimensional structural schematic diagram of another part of the installation mechanism of the present utility model;

[0022] Reference numerals: 1, valve body; 2, bracket; 3, cylinder; 4, limit switch; 5, installation mechanism; 501, threaded pipe; 502, sealing gasket; 503, installation pipe; 504, installation head; 6, connecting bolt; 7, connecting nut; 8, first bolt; 9, second bolt; 10, third bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0024] The present application provides a pneumatic ball valve made entirely of plastic materials, mainly to solve the problem that many cylinders, brackets or limit switches are made of metal materials, and in an acidic environment with strong corrosion, the brackets, cylinders or limit switches are easily corroded and damaged. The following technical solutions are provided and will be described in detail below: Embodiment

[0025] As Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown in [relevant figures], in some embodiments, it includes a valve body 1. A bracket 2 is fixed to the upper part of the valve body 1. The top of the bracket 2 is fixedly connected and communicated with a cylinder 3. A limit switch 4 is fixedly installed on the top of the cylinder 3; the valve body 1 is made of PVDF plastic material; the bracket 2 is made of PA plastic material; the cylinder 3 is made of PA plastic material; the limit switch 4 is made of PA plastic material.

[0026] Specifically: By setting that the valve body 1, the bracket 2, the cylinder 3, and the limit switch 4 are all made of plastic materials, it has good anti-corrosion functions in a corrosive environment, reduces the failure rate, increases the service life of the valve, and saves costs for enterprise production.

[0027] The working principle here is as follows: The PVDF plastic valve body 1 is the main part of fluid control, and controls the flow or blockage of fluid through the internal sphere. The sphere is located inside the valve body 1 and can be connected to the external operating mechanism through the valve stem to achieve opening or closing; the bracket 2, as a structural support component, is fixed to the upper part of the valve body 1 to maintain the stability of the whole device and is connected to the cylinder 3; the cylinder 3 is responsible for providing power, driving the valve stem to move up and down through the change of air pressure, and then controlling the opening and closing state of the sphere. Due to the use of PA plastic material, it has good corrosion resistance and mechanical strength and is suitable for use in a variety of chemical fluids; the limit switch 4 is installed on the top of the cylinder 3 to detect the position of the valve stem. When the valve stem reaches the limit position of opening or closing, the limit switch 4 will send a signal so that the control system can know the state of the valve and make corresponding adjustments. Also made of PA plastic material, it ensures its reliability in a harsh environment; PVDF plastic is selected for making the valve body 1 because it has excellent anti-aging, chemical resistance and heat resistance characteristics. The PA plastic used for the bracket 2, the cylinder 3 and the limit switch 4, also known as polyamide, is a material with high wear resistance and good mechanical properties. After the solenoid valve is energized, the compressed air filters out the impurities in the air through the filter pressure reducing valve, enters the solenoid valve and then enters the diaphragm valve cylinder 3, and the valve opens. The solenoid valve and the filter pressure reducing valve are directly installed at the air source inlet of the diaphragm valve, which looks compact, simple and beautiful as a whole, is convenient for maintenance and inspection, brings great convenience to on-site maintenance personnel, and improves work efficiency.

[0028] As Figure 1 ,Figure 3 , Figure 4 As shown in Figure 4 , in some embodiments, the mounting mechanism 5 includes a threaded pipe 501 fixedly connected to the valve body 1. A sealing gasket 502 is placed at the other end of the threaded pipe 501. An installation pipe 503 is threadedly connected to the threaded pipe 501. The other end of the installation pipe 503 is fixedly connected to a mounting head 504. A connecting bolt 6 is threadedly connected to the mounting head 504. The connecting bolt 6 sequentially passes through the mounting head 504 and the valve body 1, and a connecting nut 7 is threadedly connected to the other end of the connecting bolt 6. The working principle here is as follows: The threaded pipe 501 is fixedly connected to the valve body 1. One end of the threaded pipe 501 is connected to the valve body 1, and the other end is provided with a sealing gasket 502. The sealing gasket 502 is used to ensure the sealing performance at the connection and prevent fluid leakage. The installation pipe 503 is threadedly connected to the threaded pipe 501. By rotating the installation pipe 503, it can be fastened to the threaded pipe 501. This process ensures a firm connection between the installation pipe 503 and the threaded pipe 501. The other end of the installation pipe 503 is fixedly connected to the mounting head 504. The mounting head 504 is an important connecting component of the entire mounting mechanism 5 and is used to fix and stabilize the valve body 1. The connecting nut 7 is threadedly connected to the other end of the connecting bolt 6. By rotating the connecting nut 7, it can be fastened to the connecting bolt 6. When the connecting nut 7 is tightened, the connecting bolt 6 will firmly press the mounting head 504 and the valve body 1 together, ensuring a stable connection between the two. Embodiment

[0029] The solution in Embodiment 1 will be further introduced below in combination with the specific working mode. See the following description for details:

[0030] As Figure 1 , Figure 2 shown, in some embodiments, a first bolt 8 is fixedly installed between the valve body 1 and the bracket 2; a second bolt 9 is fixedly installed between the bracket 2 and the cylinder 3; a third bolt 10 is fixedly installed between the cylinder 3 and the limit switch 4. The working principle here is as follows: The valve body 1, the bracket 2, the bracket 2 and the cylinder 3, and the cylinder 3 and the limit switch 4 are firmly connected together by the first bolt 8, the second bolt 9, and the third bolt 10 respectively. This bolt connection method can ensure the stable fixation of each component and prevent loosening or displacement during the operation of the valve. In the valve, an interference fit is usually adopted between the sealing ring and the valve body 1. By adjusting the flange bolts in the gland, the sealing ring can be compressed, thereby generating a lateral force to seal the middle hole surface of the valve body 1 and the outer circle of the plunger. This can not only ensure the sealing performance of the valve but also prevent internal and external leakage. At the same time, this design also helps to reduce the opening torque of the valve and achieve the rapid opening and closing of the valve.

[0031] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pneumatic ball valve made of all-plastic material, comprising a valve body (1), characterized in that, A bracket (2) is fixed to the upper part of the valve body (1). A cylinder (3) is fixedly communicated with the top of the bracket (2). A limit switch (4) is fixedly installed on the top of the cylinder (3). An installation mechanism (5) for convenient installation is arranged on the valve body (1). The installation mechanism (5) includes a threaded pipe (501) fixedly communicated with the valve body (1). A sealing gasket (502) is placed at the other end of the threaded pipe (501). An installation pipe (503) is threadedly connected to the threaded pipe (501). An installation head (504) is fixedly communicated with the other end of the installation pipe (503). A connecting bolt (6) is threadedly connected to the installation head (504). The connecting bolt (6) sequentially penetrates through the installation head (504) and the valve body (1), and a connecting nut (7) is threadedly connected to the other end of the connecting bolt (6). The valve body (1) is made of PVDF plastic material. The bracket (2) is made of PA plastic material. The cylinder (3) is made of PA plastic material. The limit switch (4) is made of PA plastic material.

2. The pneumatic ball valve made of all plastic materials according to claim 1, wherein A first bolt (8) is fixedly installed between the valve body (1) and the bracket (2).

3. A pneumatic ball valve made of all plastic materials according to claim 1, characterized in that A second bolt (9) is fixedly installed between the bracket (2) and the cylinder (3).

4. A pneumatic ball valve made of all plastic materials according to claim 1, characterized in that, A third bolt (10) is fixedly installed between the cylinder (3) and the limit switch (4).

Images