Self-operated regulating valve

Abstract

The utility model discloses a self-operated regulating valve, which comprises a valve body, a valve cover, a valve rod and a valve core, an input channel and an output channel are arranged in the valve body, the input channel and the output channel are distributed up and down, a mounting port is arranged between the input channel and the output channel, a valve seat is arranged on the mounting port, and a valve port is arranged on the valve seat. The valve element is connected to the lower end of the valve rod, is close to the valve port and is used for opening or closing the valve port, the valve rod moves upwards under the action of the spring, the upper end of the valve rod is connected with a diaphragm seat, the diaphragm seat is connected with a diaphragm, the diaphragm is installed between the upper cover and the lower cover, and a first sealing cavity is formed between the diaphragm and the upper cover. A second sealing cavity is formed between the diaphragm and the lower cover, the first sealing cavity is communicated with an output channel of the valve body through a pipeline, when medium pressure of the output channel is too high, the medium pressure extrudes the second sealing cavity through the first sealing cavity, and the second sealing cavity is compressed to overcome the elastic force of the spring to drive the valve rod to move downwards. And the valve core is driven to close or close the valve port.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a self-operated regulating valve. Background Art

[0002] Traditional valves have an output channel and an input channel. The valve core of the valve adjusts the valve opening or opens and closes the valve port between the output channel and the input channel. The valve core is generally operated by an actuator. The actuator is a cylinder, a motor drive, or a handwheel through a worm gear. The control of the actuator is manual or electronic. These require human control. When the valve is used in some media conditions, when the pressure in the output channel is too high, some flammable media will have a risk of leakage, and it is necessary to intercept or close the flow by manipulating the valve core. Manual operation of the valve core is very time-consuming and labor-intensive. If it is operated automatically, the cost of each component used is relatively high. Therefore, the existing valves have the problem of high use cost or high manufacturing cost. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a self-operated regulating valve, thereby greatly reducing labor costs. Its purpose is that the valve can automatically cut off or close when the pressure of the output medium is too high.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-operated regulating valve, comprising a valve body, a valve cover, a valve stem and a valve core, the valve cover is installed at the upper end of the valve body, the valve stem passes through the valve cover, an input channel and an output channel are arranged in the valve body, the input channel and the output channel are distributed up and down and an installation port is arranged between them, a valve seat is arranged on the installation port, a valve port is arranged on the valve seat, the valve core is connected to the lower end of the valve stem and close to the valve port for opening or closing the valve port, the valve stem moves upward under the action of a spring, so that the valve core is away from the valve port, a diaphragm seat is connected to the upper end of the valve stem, a diaphragm is connected to the diaphragm seat, the diaphragm is installed between an upper cover and a lower cover, a first sealed chamber is formed between the diaphragm and the upper cover, a second sealed chamber is formed between the diaphragm and the lower cover, the first sealed chamber is connected to the output channel of the valve body through a pipeline, when the medium pressure of the output channel is too high, the medium pressure is squeezed through the first sealed chamber to the second sealed chamber, after the second sealed chamber is compressed, the elastic force of the spring is overcome to drive the valve stem to move downward, and the valve core is driven to cut off or close the valve port.

[0005] The outer wall of the valve cover is screwed with an adjusting disk whose position can be adjusted up and down, and a spring positioning plate is connected to the valve stem. The spring is arranged between the spring positioning plate and the adjusting disk.

[0006] A bracket is arranged on the valve cover, the lower cover is mounted on the bracket, the bracket comprises a lower plate and an upper plate mounted on the valve cover, the upper plate and the lower plate are connected by a plurality of symmetrically arranged support rods, and the lower cover is connected to the upper plate.

[0007] The beneficial effect of the utility model is that when the medium pressure in the output channel of the valve body is too high, since the first sealed chamber is connected to the output channel of the valve body through a pipeline, the medium pressure is squeezed into the second sealed chamber through the first sealed chamber, and after the second sealed chamber is compressed, the elastic force of the spring is overcome to drive the valve stem to move downward, driving the valve core to cut off or close the valve port, thereby achieving the technical effect that the valve can automatically cut off or close when the medium pressure after the output is too high, greatly reducing the use cost of the valve and effectively improving the reliability of the valve.

[0008] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a stereogram of a specific implementation method of the utility model. DETAILED DESCRIPTION

[0010] The present invention is specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the protection scope of the present invention.

[0011] like Figure 1 As shown, this embodiment discloses a self-operated regulating valve, including a valve body 1, a valve cover 2, a valve stem 3 and a valve core 4. The valve cover 2 is installed on the upper end of the valve body 1, and the valve stem 3 passes through the valve cover 2. An input channel 11 and an output channel 12 are arranged in the valve body 1. The input channel 11 and the output channel 12 are distributed up and down and an installation port is arranged between them. A valve seat 5 is arranged on the installation port, and a valve port is arranged on the valve seat 5. The valve core 4 is connected to the lower end of the valve stem 3 and is close to the valve port for opening or closing the valve port. The valve stem 3 moves upward under the action of a spring 6, so that the valve core 4 is away from the valve port. The end is connected to a diaphragm seat 8, the diaphragm seat 8 is connected to a diaphragm 7, the diaphragm 7 is installed between an upper cover 71 and a lower cover 72, a first sealed chamber 9 is formed between the diaphragm 7 and the upper cover 71, a second sealed chamber 10 is formed between the diaphragm 7 and the lower cover 72, the first sealed chamber 9 is connected to an output channel 12 of the valve body 1 through a pipeline 13, when the medium pressure of the output channel 12 is too high, the medium pressure is squeezed into the second sealed chamber 10 through the first sealed chamber 9, and after the second sealed chamber 10 is compressed, it overcomes the elastic force of the spring 6 to drive the valve stem 3 to move downward, and drives the valve core 4 to cut off or close the valve port.

[0012] An adjusting disk 20 whose position can be adjusted up and down is screwed on the outer wall of the valve cover 2, a spring positioning plate 30 is connected to the valve stem 3, and the spring 6 is arranged between the spring positioning plate 30 and the adjusting disk 20. At the same time, the spring 6 includes a large spring with a larger outer diameter and a small spring with a smaller outer diameter. The small spring is arranged at the inner hole position of the large spring. The adjusting disk 20 is threadedly connected to the outer wall of the valve cover 2 and can be adjusted up and down, thereby adjusting the elastic force of the spring 6, and then adjusting the pressure value used for the valve core 4 to block the valve port.

[0013] A bracket 40 is provided on the valve cover 2, and the lower cover 72 is installed on the bracket 40. The bracket 40 includes a lower plate 401 and an upper plate 402 installed on the valve cover 2. The upper plate 402 and the lower plate 401 are connected by a plurality of symmetrically arranged support rods 403, and the lower cover 72 is connected to the upper plate 402. This structure can make the installation of the lower cover 72 more reliable, ensuring the reliability of the expansion and contraction of the valve stem 3 and the activity of the diaphragm 7.

[0014] By adopting the above technical scheme, when the medium pressure of the output channel 12 of the valve body 1 is too high, since the first sealed chamber 9 is connected to the output channel 12 of the valve body 1 through a pipeline, the medium pressure is squeezed into the second sealed chamber 10 through the first sealed chamber 9. After the second sealed chamber 10 is compressed, it overcomes the elastic force of the spring 6 to drive the valve stem 3 to move downward, and drives the valve core 4 to cut off or close the valve port. In this way, the technical effect of the valve being able to cut off or close itself when the pressure of the medium after the output is too high is achieved, which greatly reduces the use cost of the valve and effectively improves the reliability of the valve.

[0015] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0016] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A self-operated regulating valve, comprising a valve body, a valve cover, a valve stem and a valve core, wherein the valve cover is mounted on the upper end of the valve body, the valve stem passes through the valve cover, an input channel and an output channel are arranged in the valve body, the input channel and the output channel are arranged up and down and an installation port is arranged between them, a valve seat is arranged on the installation port, a valve port is arranged on the valve seat, the valve core is connected to the lower end of the valve stem and is close to the valve port for opening or closing the valve port, and is characterized in that: The valve stem moves upward under the action of the spring, so that the valve core moves away from the valve port. A diaphragm seat is connected to the upper end of the valve stem, and the diaphragm seat is connected to the diaphragm. The diaphragm is installed between the upper cover and the lower cover. A first sealed chamber is formed between the diaphragm and the upper cover, and a second sealed chamber is formed between the diaphragm and the lower cover. The first sealed chamber is connected to the output channel of the valve body through a pipeline.

2. The self-operated regulating valve according to claim 1, characterized in that: The outer wall of the valve cover is screwed with an adjusting disk whose position can be adjusted up and down, and a spring positioning plate is connected to the valve stem. The spring is arranged between the spring positioning plate and the adjusting disk.

3. The self-operated regulating valve according to claim 1, characterized in that: A bracket is arranged on the valve cover, the lower cover is mounted on the bracket, the bracket comprises a lower plate and an upper plate mounted on the valve cover, the upper plate and the lower plate are connected by a plurality of symmetrically arranged support rods, and the lower cover is connected to the upper plate.

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