High-temperature-resistant hard sealing pneumatic ball valve

Abstract

The utility model relates to the technical field of pneumatic valves, in particular to a high-temperature-resistant hard sealing pneumatic ball valve. The high-temperature-resistant hard-sealing pneumatic ball valve comprises a pneumatic actuator and a valve assembly, the valve assembly comprises a valve body, a valve cover, a ball body and a valve rod, the valve body and the valve cover are connected with each other, one end of the valve rod is connected with the pneumatic actuator, and the other end of the valve rod is connected with the ball body. A containing gap used for containing padding is formed between the valve rod and the valve body. The gland assembly comprises an upper gland, a first elastic piece and a lower gland which are arranged from top to bottom; the upper gland and the lower gland are both arranged on the valve rod in a sleeving mode. The first elastic piece can extrude the upper gland and the lower gland respectively. The upper gland is connected with the valve body, one end of the lower gland is connected with the first elastic piece, and the other end extends towards the containing gap. The pneumatic ball valve has excellent high-temperature-resistant sealing performance, zero leakage of the valve can be achieved, the circulation performance of a valve medium is improved, the service life of the valve is prolonged, mounting and dismounting are convenient, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic valves, in particular to a high-temperature resistant hard-sealed pneumatic ball valve. Background Art

[0002] A pneumatic ball valve is a ball valve equipped with a pneumatic actuator. Pneumatic actuators operate relatively quickly, with the fastest switching speed reaching 0.05 seconds per cycle. Therefore, they are often called pneumatic quick-shut ball valves. Pneumatic ball valves offer a simple and compact structure, reliable sealing, and easy maintenance. The sealing surface and the ball surface are always closed, making them less susceptible to erosion by the medium. They are easy to operate and maintain, and are suitable for general working media such as water, solvents, acids, and natural gas. They are primarily used to shut off or connect media in pipelines, and can also be used for regulating and controlling fluids.

[0003] Patent document CN201420784469.4 discloses a pneumatic ball valve, specifically a pneumatic ball valve comprising a valve body, a valve cover, a ball, a valve stem, and a pneumatic actuator. The valve body defines a cavity, a valve seat is mounted in the cavity, a spring is provided between the valve seat and the inner wall of the valve body, a ball is mounted in the valve seat, one end of the valve stem is in transmission connection with the ball, and the other end of the valve stem is connected to the pneumatic actuator. Compared with the prior art, this technology features grooves and a corrosion-resistant and erosion-resistant hard alloy coating on both the inner surface of the valve body and the outer surface of the ball, which improves the valve's erosion resistance and sealing properties, extending its service life.

[0004] However, the pneumatic ball valve involved in the above patent has a potential leakage risk due to its packing method when the ball valve is used in conjunction with a pneumatic actuator. Utility Model Content

[0005] The purpose of this utility model includes providing a high-temperature resistant hard-sealed pneumatic ball valve, which has excellent high-temperature resistant sealing performance, can achieve zero leakage of the valve, increase the flow performance of the valve medium, and improve the service life of the valve. It is easy to install and disassemble, saving time and effort.

[0006] In order to achieve the above purpose, the preferred solution adopted by the present invention is:

[0007] A high-temperature resistant hard-seal pneumatic ball valve includes a pneumatic actuator and a valve assembly, the valve assembly includes a valve body and a valve cover connected to each other, a ball and a valve stem connected to each other, one end of the valve stem is connected to the pneumatic actuator, and the other end is connected to the ball, the pneumatic ball valve also includes a gland assembly; there is an accommodating gap for placing filler between the valve stem and the valve body; the gland assembly includes an upper gland, a first elastic member and a lower gland arranged from top to bottom; the upper gland and the lower gland are both sleeved on the valve stem, and the first elastic member can form extrusion with the upper gland and the lower gland respectively; the upper gland is connected to the valve body, one end of the lower gland is connected to the first elastic member, and the other end extends toward the accommodating gap.

[0008] Furthermore, in a preferred embodiment of the present invention, it also includes a valve seat and a second elastic member; one side of the sphere is close to the valve body, and the other side of the sphere is close to the valve cover; the valve seat is arranged between the valve body and the sphere; the second elastic member is arranged between the valve body and the valve seat and can form extrusion.

[0009] Furthermore, in a preferred embodiment of the present invention, a thrust bearing is further included; the thrust bearing is arranged between the valve stem and the valve body, and the thrust bearing is also arranged between the gland and the ball.

[0010] Furthermore, in a preferred embodiment of the present invention, a gasket is provided at the connection between the valve body and the valve cover.

[0011] Furthermore, in a preferred embodiment of the present invention, the upper gland is connected to the valve body via bolts.

[0012] Furthermore, in a preferred embodiment of the present invention, the valve body and the valve cover are connected by bolts.

[0013] Furthermore, in a preferred embodiment of the present invention, the first elastic member and the second elastic member are springs.

[0014] The beneficial effects of the high temperature resistant hard seal pneumatic ball valve provided by the utility model are:

[0015] The high-temperature resistant hard-sealed pneumatic ball valve provided by the utility model includes a pneumatic actuator and a valve assembly. Based on the structural design of the valve assembly and the design of the connection between the various components, the high-temperature resistant hard-sealed pneumatic ball valve can achieve:

[0016] (1) The gland assembly used in the pneumatic ball valve can adjust the degree of compression of the packing according to actual conditions, thereby ensuring good sealing inside the ball valve. The valve seat of the pneumatic ball valve adopts a single valve seat structure, and an alloy steel spring with good high-temperature resistance is set on one side, which can achieve zero leakage rate at a high temperature of 630℃, and well realize the medium cutoff effect under high-temperature working conditions to achieve zero leakage;

[0017] (2) The design of the pneumatic ball valve adopts a full-flow valve diameter and has the characteristic of rapid opening within 2 seconds. After the valve is opened, the pipeline medium begins to be discharged. The valve closing part is straight with the valve channel. There is no obstruction in the flow channel, which optimizes the flow channel area and makes the valve have a better pressure drop. It greatly reduces the cavitation caused by the medium to the valve internals, and also greatly increases the flow performance of the valve medium.

[0018] (3) The pneumatic ball valve has a high opening and closing speed, which greatly reduces the time that the closing part stays in the channel during the opening / closing process of the valve, thereby reducing the time and opportunity for the closing part to be eroded by the medium, thereby ensuring the service life of the valve. The working service life of the valve in this position is increased from the original 1 month to 4 years, greatly improving the operating efficiency of the boiler pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A partial cross-sectional schematic diagram of a high-temperature resistant hard-sealed pneumatic ball valve provided by an embodiment of the present utility model;

[0021] Icons: 10-high temperature resistant hard-seal pneumatic ball valve, 100-pneumatic actuator, 200-gland assembly, 300-valve assembly, 400-valve seat, 500-thrust bearing, 600-second elastic part, 700-gasket, 800-accommodation gap, 310-valve body, 320-valve cover, 330-ball, 340-valve stem, 210-upper gland, 220-first elastic part, 230-lower gland. DETAILED DESCRIPTION

[0022] These are some, but not all, embodiments of the present invention. Components of the embodiments of the present invention generally described and shown in the accompanying drawings herein may be arranged and designed in a variety of different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] Example 1

[0026] The following is combined with Figure 1 The utility model is further described as follows:

[0027] The utility model provides a high temperature resistant hard seal pneumatic ball valve 10, please refer to Figure 1 The high temperature resistant hard seal pneumatic ball valve 10 includes a pneumatic actuator 100 , a gland assembly 200 , a valve assembly 300 , a valve seat 400 , a thrust bearing 500 and a second elastic member 600 .

[0028] The valve assembly 300 includes a valve body 310 and a valve cover 320 connected to each other, and a ball 330 and a valve stem 340 connected to each other. A gasket 700 is provided at the connection between the valve body 310 and the valve cover 320. The valve body 310 and the valve cover 320 can be connected by bolts. One end of the valve stem 340 is connected to the pneumatic actuator 100, and the other end is connected to the ball 330. One side of the ball 330 is adjacent to the valve body 310, and the other side of the ball 330 is adjacent to the valve cover 320. The valve seat 400 is disposed between the valve body 310 and the ball 330. A second elastic member 600 is disposed between the valve body 310 and the valve seat 400 and can form an extrusion force. In this embodiment, the second elastic member 600 is preferably a spring.

[0029] In this embodiment, a receiving gap 800 for placing packing is defined between the valve stem 340 and the valve body 310 . A thrust bearing 500 is disposed between the valve stem 340 and the valve body 310 , and also between the gland and the ball 330 .

[0030] In this embodiment, the gland assembly 200 includes an upper gland 210 , a first elastic member 220 , and a lower gland 230 , which are arranged from top to bottom.

[0031] The upper gland 210 and the lower gland 230 are both sleeved onto the valve stem 340, and the first elastic member 220 can be pressed against the upper gland 210 and the lower gland 230, respectively. The upper gland 210 and the valve body 310 can be connected by bolts. One end of the lower gland 230 is connected to the first elastic member 220, and the other end extends toward the accommodation gap 800. In this embodiment, the first elastic member 220 is preferably a spring.

[0032] The high-temperature resistant hard-sealed pneumatic ball valve 10 provided in this embodiment works as follows: by rotating the bolts to control the degree of extrusion of the upper cover 210 on the lower cover 230, the packing is compacted and tightened to ensure good sealing inside the ball valve. At the same time, a valve seat 400 and an alloy steel spring with good high-temperature resistance are set on one side, which can achieve zero leakage rate at a high temperature of 630°C and well realize the medium cutoff effect under high-temperature working conditions.

[0033] To sum up, this embodiment provides a high-temperature resistant hard-sealed pneumatic ball valve 10, which has excellent high-temperature resistant sealing performance, can achieve zero valve leakage, increase the flow performance of the valve medium, and improve the service life of the valve. It is also easy to install and disassemble, saving time and effort.

[0034] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or 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 high-temperature resistant hard-sealed pneumatic ball valve, comprising a pneumatic actuator and a valve assembly, wherein the valve assembly comprises a valve body and a valve cover connected to each other, and a ball and a valve stem connected to each other, wherein one end of the valve stem is connected to the pneumatic actuator and the other end is connected to the ball, characterized in that: The pneumatic ball valve further includes a gland assembly; a receiving gap for placing a packing is provided between the valve stem and the valve body; The gland assembly comprises an upper gland, a first elastic member and a lower gland arranged from top to bottom; The upper gland and the lower gland are both sleeved on the valve stem, and the first elastic member can be respectively squeezed with the upper gland and the lower gland; The upper pressure cover is connected to the valve body, one end of the lower pressure cover is connected to the first elastic member, and the other end extends toward the accommodating gap.

2. The high temperature resistant hard seal pneumatic ball valve according to claim 1, characterized in that: It also includes a valve seat and a second elastic member; one side of the sphere is close to the valve body, and the other side of the sphere is close to the valve cover; the valve seat is arranged between the valve body and the sphere; the second elastic member is arranged between the valve body and the valve seat and can form extrusion.

3. The high temperature resistant hard seal pneumatic ball valve according to claim 1, characterized in that: It also includes a thrust bearing; the thrust bearing is arranged between the valve stem and the valve body, and at the same time, the thrust bearing is arranged between the pressure cover and the ball.

4. The high temperature resistant hard seal pneumatic ball valve according to claim 1, characterized in that: A gasket is provided at the connection between the valve body and the valve cover.

5. The high temperature resistant hard seal pneumatic ball valve according to claim 1, characterized in that: The upper gland is connected to the valve body via bolts.

6. The high temperature resistant hard seal pneumatic ball valve according to claim 1, characterized in that: The valve body and the valve cover are connected by bolts.

7. The high temperature resistant hard seal pneumatic ball valve according to claim 2, characterized in that: The first elastic member and the second elastic member are springs.

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