CN215891124U

CN215891124U - Corrosion-resistant automatic exhaust valve

Info

Publication number: CN215891124U
Application number: CN202121539685.9U
Authority: CN
Inventors: 袁建权; 涂晓波; 孙鹏飞
Original assignee: Wuhan Weimeng Environmental Technology Co ltd
Current assignee: Wuhan Weimeng Environmental Technology Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2022-02-22
Anticipated expiration: 2031-07-08

Abstract

The utility model relates to a corrosion-resistant automatic exhaust valve, which comprises a valve seat arranged on a shell, wherein an air guide hole is formed in the upper part of the valve seat and communicated with the atmosphere, a guide hole is formed in the lower part of the valve seat, the centers of the air guide hole and the guide hole are in the same straight line, a spring seat is fixed in the guide hole, the upper end of the spring seat is connected with a valve core through a spring, the valve core is made of polytetrafluoroethylene, the top end of the valve core is a cone, a movable window is formed in the middle of the valve seat, a lever is clamped and sleeved on the shoulder of the valve core, one end of the lever is connected to the valve seat, the other end of the lever extends out of the movable window and is connected with a connecting rod, and a floating ball is fixedly connected to the lower end of the connecting rod. The exhaust valve adopts conical surface sealing, the sealing is reliable, and the valve core adopts polytetrafluoroethylene, so that the exhaust valve has the characteristics of corrosion resistance and ozonization resistance.

Description

Corrosion-resistant automatic exhaust valve

Technical Field

The utility model relates to a corrosion-resistant automatic exhaust valve, and belongs to the field of chemical machinery.

Background

Exhaust valves are commonly used in central heating systems and the like. When gas overflows from the system, the gas ascends along the pipeline and finally gathers at the highest point of the system, the exhaust valve is generally installed at the highest point of the system, when the gas enters the valve cavity of the exhaust valve and gathers at the upper part of the exhaust valve, the pressure rises along with the increase of the gas in the valve, when the gas pressure is higher than the system pressure, the gas can enable the water surface in the cavity to fall, the buoy falls along with the water level, and the exhaust port is opened; after the gas is exhausted, the water level rises, the buoy also rises along with the water level, and the exhaust port is closed.

Patent CN201410226108.2 provides an automatic exhaust valve, including casing, flotation pontoon and seal valve, be equipped with the water inlet of below and the gas vent of top on the casing, the upper portion of flotation pontoon pass through the lever with the sub-unit connection of seal valve, the seal valve can block up the exhaust hole, the seal valve includes sealed support, jump ring support and has the sealed disk seat of central through-hole, the lower extreme and the lever connection of sealed support, its upper end with sealed disk seat swing joint, just sealed support can be right the central through-hole of sealed disk seat seals, jump ring support suit is in on the sealed disk seat, its both sides are connected with the both ends of jump ring respectively, the middle part of jump ring cup joints on the middle section of sealed support.

Patent CN201621218437.3 provides an automatic exhaust valve with a valve seat positioning structure, which includes an upper housing and a lower housing, wherein a hollow valve seat is mounted on the upper housing, a valve plug in the hollow valve seat is pressed on a valve port by a spring, a valve rod is fixed at the rear end of the valve plug, and the front end of a floating ball connecting rod is located below the valve rod, characterized in that a plane is formed above the hollow valve seat; after adopting above-mentioned structure, during the assembly, the upper surface of cavity shape disk seat closely laminates with the upper surface of last casing, makes the disk seat location, has prevented the rotation of disk seat effectively.

The automatic exhaust valves related to patents CN201410226108.2 and CN201621218437.3 adopt plane-to-plane sealing as the sealing mode of the valve core, and the sealing is not reliable enough. In addition, ozone is somewhat corrosive in ozone generation and transmission systems. The sealing materials of patent CN201410226108.2 and patent CN201621218437.3 adopt soft rubber, so the corrosion resistance and the aging resistance are poor, and the application range and the service life are limited.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of overcoming the defects of the existing exhaust valve product and provide the automatic exhaust valve which is reliable in sealing and corrosion resistant.

The utility model provides a corrosion-resistant automatic exhaust valve, is including installing the disk seat on the casing, disk seat upper portion has the air guide hole to communicate with each other with the atmosphere, there is the guiding hole disk seat lower part, the air guide hole with the center of guiding hole is on a straight line, be fixed with the spring holder in the guiding hole, there is the case spring holder upper end through spring coupling, the case adopts the polytetrafluoroethylene material, and the top of case is the cone, there is the movable window at the middle part of disk seat, the shoulder card cover of case has the lever, the one end of lever is connected on the disk seat, and the other end stretches out the movable window and is connected with the connecting rod, a floater of connecting rod lower extreme fixed connection.

The bottom of air guide hole is cone type, and the apex angle of this cone is unanimous with the apex angle of case top cone.

The spring seat is fixed in the guide hole through threads. The spring seat can be moved up and down in the guide hole through the rotation of the screw thread.

The floating ball, the valve seat and the shell are made of corrosion-resistant metal materials. In order to ensure that the floating ball floats upwards along with the rise of the liquid level, the floating ball is of a hollow structure.

The utility model relates to an automatic exhaust valve with a corrosion-resistant valve core, which has the working principle that: the saturated gas in the liquid in the shell is continuously separated, the gas accumulation on the upper part of the shell is gradually increased, the air pressure is increased, and the liquid level is reduced. Under the action of the gravity of the floating ball, the lever is driven to move downwards, the valve core is opened, and the gas overflows. Along with the overflow of gas, the liquid level rises, and the floater floats and rises, loses the effort to the case. Under the action of the pre-tightening spring, the valve core moves upwards and closes, and the automatic exhaust valve has no gas exhaust. If the gas in the shell continues to accumulate, the liquid level will decrease, the exhaust valve is opened, and the operation is repeated.

The automatic exhaust valve is applied to the valve core through the gravity of the floating ball by the lever principle. The valve core moves in the guide hole which is in a straight line with the exhaust hole, so that the valve core can not deviate all the time in the use process, the service life is prolonged, and the opening is more sensitive. Simultaneously, the volume of the floating ball is reduced, and the whole size of the automatic exhaust valve is correspondingly reduced.

The valve core of the automatic exhaust valve adopts polytetrafluoroethylene, has the characteristics of acid and alkali resistance, various organic solvents resistance, high temperature resistance and ozone oxidation resistance.

According to the automatic exhaust valve, the top end of the valve core adopts a cone structure, the bottom end of the air guide hole also adopts a cone structure, and the valve core and the air guide hole are sealed through a cone surface. Compared with the line sealing and the surface sealing which are commonly used in the prior art, the sealing performance is good.

Drawings

Fig. 1 is a schematic view of the general sectional structure of an automatic exhaust valve.

Fig. 2 is a schematic sectional view of the valve element and the valve seat according to the present invention.

The valve comprises a valve seat 1, a valve core 2, a lever 3, a shell 4, a floating ball 5, a spring 6, a spring seat 7, an air guide hole 8, a guide hole 9, a movable window 10 and a connecting rod 11.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the present invention will be described below with reference to the accompanying drawings and preferred embodiments.

The utility model aims to provide an automatic exhaust valve which is reliable in sealing and corrosion-resistant.

Referring to fig. 1-2, a corrosion-resistant automatic exhaust valve comprises a valve seat 1 installed on a shell 4, wherein an air guide hole 8 is formed in the upper portion of the valve seat 1 and communicated with the atmosphere, a guide hole 9 is formed in the lower portion of the valve seat 1, the center of the air guide hole 8 and the center of the guide hole 9 are located on the same straight line, a spring seat 7 is fixed in the guide hole 9, the upper end of the spring seat 7 is connected with a valve core 2 through a spring 6, the valve core 2 is made of polytetrafluoroethylene, the top end of the valve core 2 is a cone, a movable window 10 is formed in the middle of the valve seat 1, a lever 3 is clamped and sleeved on the shoulder of the valve core 2, one end of the lever 3 is connected to the valve seat 1, the other end of the lever extends out of the movable window 10 and is connected with a connecting rod 11, and a floating ball 5 is fixedly connected to the lower end of the connecting rod 11.

The spring seat 7 is fixed in the guide hole 9 through threads. Through the rotation of the screw thread, the spring seat 7 can be moved up and down in the guide hole.

The floating ball 5, the valve seat 1, the shell 4, the lever 3 and the connecting rod 11 are made of corrosion-resistant metal materials. In order to ensure that the floating ball 5 floats upwards along with the rising of the liquid level, the floating ball is of a hollow structure.

The valve seat 1 is arranged in the shell 4, when the liquid level in the shell 4 is lower than the lower end surface of the floating ball 5, the gravity of the floating ball acts on the valve core 2 through the lever 3, the valve core is opened, and gas overflows. When the liquid level rises and the floating ball 5 is floated, the acting force on the lever 3 is lost, the valve core 2 is closed, and the liquid is prevented from being discharged.

In order to ensure that the floating ball is floated, the floating ball adopts a hollow structure, and the valve seat, the shell and the lever adopt corrosion-resistant metal materials.

Referring to fig. 2, the operating principle of the valve core is as follows: when the valve core 2 is acted by the downward acting force of the lever 3 and is larger than the pretightening force of the spring 4, the cone of the valve core 2 is separated from the conical surface at the bottom end of the air guide hole 8 in the valve seat 1 to form a gap, namely the valve core is opened, and gas overflows from the gap. After the acting force of the lever 3 on the valve core 2 disappears, the acting force of the spring 6 is on the valve core body 2, and the cone of the valve core 2 is attached to the conical surface of the air guide hole 8 in the valve seat 1, namely the valve core is closed. The spring seat 5 is connected with the valve body 1 through threads and used for adjusting the pretightening force of the spring 6, so that the opening degree of the valve core is controlled, and the air displacement of the automatic exhaust valve is adjusted. The valve seat 1, the lever 3, the spring 4 and the spring seat 5 are made of corrosion-resistant metal materials. The sealing between the valve core 2 and the exhaust hole 8 adopts conical surface sealing, which has the function of automatic alignment, fitting and sealing, and the sealing effect is better.

The valve core 2 is made of polytetrafluoroethylene materials, and has the advantages of low friction coefficient, small sliding resistance, small density compared with common metal materials, light weight and easy vertical movement, namely the valve core is opened and closed flexibly under small acting force.

The valve core and the exhaust hole are of a coaxial structure, and the valve core moves in the guide hole in a straight stroke manner, so that the sealing of the valve core cannot deviate. The valve core and the air guide hole are in a conical surface sealing structure, and the sealing is reliable. The utility model adopts the corrosion-resistant valve core, thereby increasing the application range and the service life of the automatic exhaust valve.

The technical key point of the corrosion-resistant valve core is that the valve core is sealed by a conical surface and is reliable in sealing. The valve core is made of polytetrafluoroethylene materials and is corrosion-resistant.

The basic idea of the utility model is as described above. The scope of protection of the essential technical solution of the present invention should include the usual variations of the technical points described above.

Claims

1. A corrosion-resistant automatic exhaust valve comprises a valve seat (1) arranged on a shell (4), wherein an air guide hole (8) is formed in the upper portion of the valve seat (1) and communicated with the atmosphere, the corrosion-resistant automatic exhaust valve is characterized in that a guide hole (9) is formed in the lower portion of the valve seat (1), the air guide hole (8) and the center of the guide hole (9) are located on the same straight line, a spring seat (7) is fixed in the guide hole (9), the upper end of the spring seat (7) is connected with a valve core (2) through a spring (6), the valve core (2) is made of polytetrafluoroethylene, the top end of the valve core (2) is a cone, a movable window (10) is formed in the middle of the valve seat (1), a lever (3) is clamped on the shoulder of the valve core (2), one end of the lever (3) is connected to the valve seat (1), and the other end of the lever extends out of the movable window (10) and is connected with a connecting rod (11), the lower end of the connecting rod (11) is fixedly connected with a floating ball (5).

2. The automatic exhaust valve according to claim 1, characterized in that the bottom end of the air guide hole (8) is cone-shaped, and the vertex angle of the cone is consistent with that of the cone at the top end of the valve core (2).

3. Automatic exhaust valve according to claim 1 or 2, characterized in that said spring seat (7) is fixed by means of a thread in a guide hole (9).

4. The automatic exhaust valve according to claim 1 or 2, characterized in that said floating ball (5), valve seat (1), lever (3) and connecting rod (11) are made of corrosion-resistant metal material.

5. The automatic exhaust valve according to claim 4, characterized in that said floating ball (5) is a hollow structure.