Explosion-proof soft sealing gate valve structure

Abstract

The utility model discloses an anti -explosion type soft sealing gate valve structure relates to the technical field of gate valve inclined pressure relief, including signal processor and soft sealing gate valve body, the top of soft sealing gate valve body is provided with lower fixed lid, the top of lower fixed lid is provided with upper cover, the bottom of lower fixed lid is passed through and is set up import pipeline, the top of upper cover is passed through and is set up export pipeline, the inside top of upper cover is fixedly connected with compression spring, the bottom of compression spring is fixedly connected with steel ball body, the utility model discloses a compression spring and steel ball body form pressure relief structure, when the internal pressure exceeds safety threshold value, and medium pressure is directly used to steel ball body, and compression spring compression is pushed, and the pressure relief channel is opened instantly. This mechanical type triggers without electrical control, and the response speed reaches millisecond level, can release peak pressure fast, avoids water hammer impact or overpressure explosion pipe.

Description

Technical Field

[0001] This utility model relates to the field of gate valve depressurization technology, and in particular to an explosion-proof soft-seal gate valve structure. Background Technology

[0002] Soft-seal gate valves are key devices widely used in pipeline systems. Their function is to control the flow of fluid media, enabling the switching, shut-off, and regulation of fluids. A soft-seal gate valve uses a soft material as its sealing element, achieving zero-leakage sealing through elastic deformation. It is suitable for shut-off control of water, neutral liquids, and low-corrosive media. Its core structure consists of a metal valve body, a composite sealing gate, a valve stem, and a transmission device. The valve body is typically made of ductile iron or stainless steel and coated with non-toxic epoxy resin.

[0003] In existing soft-seal gate valves, unstable pipeline pressure and various other factors can pose destructive threats to both the valves and the pipeline. Pressure fluctuations repeatedly impact the soft seal surface, leading to fatigue, aging, cracking, or detachment of the sealing material, causing media leakage. Furthermore, prolonged pressure oscillations or overpressure operation can cause metal fatigue in the valve body, resulting in cracks or even breakage. Rapid valve closure or sudden changes in the flow velocity of the medium in the pipeline can generate water hammer, with instantaneous pressures reaching several times the normal operating pressure. This can impact pipeline connections, elbows, or tees, causing weld cracking, flange loosening, or pipeline rupture.

[0004] To address the issue of unstable pipeline pressure and other factors posing a destructive threat to soft-seal gate valves and pipelines, an automated pressure relief device can rapidly reduce internal pressure when it becomes excessively high, thereby mitigating the risk of damage to the soft-seal gate valve. Automated pressure relief maintains stable pressure, reducing the frequency of sealing surface replacement and extending valve lifespan. Furthermore, the stable pressure of the soft-seal gate valve prevents the soft sealing surface from being "squeezed out" or "torn" due to overpressure, avoiding environmental pollution, resource waste, or safety accidents caused by media leakage.

[0005] However, existing soft-seal gate valves still experience issues such as contamination of the pressure relief device or damage to the device, leading to a decrease in pressure relief effectiveness. Blockage of the pressure relief device or malfunction of the actuator can prevent timely pressure relief when the pressure exceeds the safety threshold, causing a sudden increase in pipeline pressure. Under overpressure conditions, the soft sealing material is easily "squeezed out" or "torn" by the high pressure, forming permanent deformation or cracks, accelerating seal failure; simultaneously, metal components such as the valve stem and body may develop fatigue cracks due to overload stress, shortening their service life. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and propose an explosion-proof soft-seal gate valve structure, which solves the problem that unstable pipeline pressure and various other factors can cause destructive threats to the soft-seal gate valve and pipeline.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An explosion-proof soft-seal gate valve structure includes a signal processor and a soft-seal gate valve body. A lower fixed cover is located at the top of the soft-seal gate valve body, and an upper sealing cover is located at the top of the lower fixed cover. An inlet pipe extends through the bottom of the lower fixed cover, and an outlet pipe extends through the top of the upper sealing cover. A compression spring is fixedly connected to the top of the inner part of the upper sealing cover, and a steel ball is fixedly connected to the bottom of the compression spring. The steel ball fits against the top of the inlet pipe. The compression spring and the steel ball are used to relieve pressure when the pressure in the soft-seal gate valve body is too high. By compressing the spring and the steel ball, the internal pressure can be quickly reduced when it is too high.

[0008] As a further improvement of this utility model, the inner wall of the lower fixed cover is provided with a threaded groove, and the bottom end of the upper cover is fixedly connected to a threaded tube, which is threadedly connected to the threaded groove. The upper cover, along with the compression spring and the steel ball body, can be removed simultaneously for cleaning and then reinstalled, thereby preventing dust from accumulating inside the pressure relief device over a long period of time.

[0009] As a further improvement of this utility model, a rubber adsorption pad is fixedly connected to the center of the inner top of the lower fixed cover. The rubber adsorption pad is made of highly elastic material, and under normal conditions, it tightly adheres to the surface of the steel ball body 212 through its own deformation, forming a "zero gap" sealing interface.

[0010] As a further improvement of this utility model, a through hole is provided through the inner wall of the inlet pipe, and a pressure sensor is fixedly connected inside the through hole. A signal transmission line is fixedly connected to the end of the pressure sensor away from the inlet pipe, and the side of the signal transmission line away from the pressure sensor is connected to a signal processor. This can capture instantaneous pressure fluctuations, trend changes, and abnormal peak values, avoiding the lag and blind spots of traditional manual inspection.

[0011] As a further improvement of this invention, the outlet pipe adopts a converging nozzle design, which is used to reduce turbulence noise. The converging design reduces local resistance loss through a gradually narrowing flow channel, thereby improving fluid transmission efficiency.

[0012] As a further improvement of this invention, the surface of the steel ball body is coated with tungsten carbide hard alloy. The high elastic modulus of the hard alloy coating can reduce the plastic deformation of the steel ball under pressure fluctuations or vibration conditions, avoid surface cracks or peeling caused by repeated extrusion, and maintain the long-term flatness of the sealing surface.

[0013] Compared with the prior art, the advantages of this utility model are as follows: 1. A pressure relief structure is formed by a compression spring and a steel ball. When the internal pressure exceeds the safety threshold, the medium pressure acts directly on the steel ball, pushing the compression spring to compress and instantly opening the pressure relief channel. This mechanical triggering requires no electrical control, has a response speed in the millisecond range, and can quickly release peak pressure, avoiding water hammer impact or overpressure pipe rupture.

[0014] 2. The threaded connection between the threaded groove and the threaded pipe eliminates the need for special tools; maintenance personnel can simply rotate the top cover to complete disassembly and installation. Regular disassembly thoroughly removes stains, crystals, or biofilm from the inlet pipe, the steel ball body, and the surface of the compression spring, preventing pressure relief delays, failures, or accidental triggering caused by blockages. Attached Figure Description

[0015] Figure 1 This is a planar cross-sectional schematic diagram of the present invention.

[0016] Figure 2 This utility model Figure 1 A schematic diagram of the three-dimensional structure at point A in the middle.

[0017] Figure 3 This is a three-dimensional structural diagram of the lower fixed cover in this utility model.

[0018] Figure 4 This is a three-dimensional structural diagram of the lower fixed cover from another angle in this utility model.

[0019] Figure 5 This is a cross-sectional three-dimensional structural diagram of the upper cover in this utility model.

[0020] Figure 6 This is a schematic diagram of the pressure sensor and signal transmission line in this utility model.

[0021] In the diagram: 100, soft-seal gate valve body; 201, upper cover; 202, lower fixed cover; 203, threaded groove; 204, rubber adsorption pad; 205, through hole; 206, inlet pipe; 207, pressure sensor; 208, signal transmission line; 209, outlet pipe; 210, threaded pipe; 211, compression spring; 212, steel ball body. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] See attached document Figure 1 -Appendix Figure 6 An explosion-proof soft-seal gate valve structure includes a soft-seal gate valve body 100, an upper cover 201, a lower fixed cover 202, a threaded groove 203, a rubber adsorption pad 204, an inlet pipe 206, a pressure sensor 207, an outlet pipe 209, a threaded pipe 210, a compression spring 211, and a steel ball body 212.

[0025] In this embodiment, the soft-seal gate valve body 100 is used as an example. When the internal pressure of the soft-seal gate valve body 100 is too high, the pressure pushes the steel ball body 212 upwards through the inlet pipe 206, thereby pushing the compression spring 211. At this time, the steel ball body 212 no longer seals the inlet pipe 206, thus releasing the pressure. When the pressure drops to a safe threshold, the compression spring 211 is pushed out by the rebound force, causing the steel ball body 212 to re-seal the inlet pipe 206. The elastic coefficient of the compression spring 211 is constant with the normal internal pressure. The aforementioned soft-seal gate valve body 100 is prior art and will not be described further in this embodiment. This mechanical triggering instantly opens the pressure relief channel without electrical control, has a response speed in milliseconds, and can quickly release peak pressure, avoiding water hammer or overpressure pipe bursts. Furthermore, the elastic coefficient of the compression spring 211 is constantly matched with the normal system pressure, ensuring that the steel ball tightly seals the inlet pipe 206 under normal pressure and reliably relieves pressure in case of overpressure, avoiding the risk of misoperation such as "constantly relieving" or "not relieving". Moreover, the pressure relief process is completed through the hard sealing interface between the steel ball body 212 and the inlet pipe 206, and the core soft sealing surface of the soft sealing gate valve body 100 does not directly bear the high pressure impact, avoiding material extrusion, tearing or fatigue aging.

[0026] Furthermore, the rubber adsorption pad 204 fixed to the top of the inlet pipe 206 allows the steel ball body 212 to be adsorbed under normal conditions and during resealing, thereby achieving a tight seal at the inlet pipe 206. The rubber adsorption pad 204 is made of highly elastic material, and under normal conditions, it deforms to tightly adhere to the surface of the steel ball body 212, forming a "zero-gap" sealing interface, effectively blocking the leakage path of the medium. Moreover, when the steel ball body 212 experiences slight displacement due to pressure fluctuations or temperature changes, the elastic memory characteristics of the rubber adsorption pad 204 automatically compensate for the displacement, maintaining continuous contact between the sealing surfaces and ensuring a "non-impact seal" upon resealing, avoiding wear or deformation of the sealing surface due to hard contact.

[0027] Furthermore, an inlet pipe 206 has a through hole 205 at the bottom of the steel ball body 212, through which a pressure sensor 207 is fixed. This allows for monitoring of the fluid pressure inside the soft-seal gate valve body 100. The detected signal is transmitted to a signal processor via a signal transmission line 208, where it is processed to identify abnormal pressure conditions inside the soft-seal gate valve body 100. The aforementioned signal processor is existing technology and will not be described further in this invention. The pressure sensor 207 directly contacts the fluid medium, acquiring real-time pressure data inside the soft-seal gate valve body 100. The analog signal is converted into a digital signal via the signal transmission line 208 and transmitted to the signal processor. This design can capture instantaneous pressure fluctuations, trend changes, and abnormal peaks, avoiding the lag and blind spots of traditional manual inspections. Real-time pressure monitoring can accurately locate sealing failure points, preventing environmental pollution, resource waste, or safety accidents caused by media leakage due to abnormal pressure.

[0028] Furthermore, after a period of use, the pressure relief device may accumulate dirt or dust inside, affecting its pressure relief effect. In this case, the upper cover 201, along with the compression spring 211 and the steel ball body 212, can be removed simultaneously through the threaded connection of the threaded groove 203 and the threaded pipe 210 for cleaning and reinstallation, thus preventing the long-term accumulation of dust inside the pressure relief device. The threaded connection requires no special tools; maintenance personnel only need to rotate the upper cover 201 to complete disassembly and installation, reducing the single operation time to 10-15 minutes and significantly reducing system downtime. Regular disassembly thoroughly removes dirt, crystals, or biofilm from the inlet pipe 206, the steel ball body 212, and the compression spring 211, preventing pressure relief delays, failures, or false triggering due to blockages. Reinstallation after cleaning restores the sealing fit between the steel ball body 212 and the inlet pipe 206, the spring elasticity coefficient, and the sensor sensitivity, ensuring accurate pressure relief thresholds, rapid response, and maintaining system pressure within a safe range.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A structure for an explosion-proof soft-seal gate valve, comprising a signal processor and a soft-seal gate valve body (100), characterized in that, The soft-seal gate valve body (100) is provided with a lower fixed cover (202) at the top end, and an upper cover (201) is provided at the top end of the lower fixed cover (202). An inlet pipe (206) is provided through the bottom end of the lower fixed cover (202), and an outlet pipe (209) is provided through the top end of the upper cover (201). A compression spring (211) is fixedly connected to the top end of the inner part of the upper cover (201), and a steel ball body (212) is fixedly connected to the bottom end of the compression spring (211). The steel ball body (212) is attached to the top end of the inlet pipe (206). The compression spring (211) and the steel ball body (212) are used to release pressure when the pressure of the soft-seal gate valve body (100) is too high.

2. The explosion-proof soft-seal gate valve structure according to claim 1, characterized in that, The inner wall of the lower fixed cover (202) is provided with a threaded groove (203), and the bottom end of the upper cover (201) is fixedly connected with a threaded tube (210), and the threaded tube (210) is threadedly connected to the threaded groove (203).

3. The explosion-proof soft-seal gate valve structure according to claim 1, characterized in that, A rubber adsorption pad (204) is fixedly connected to the center of the inner top of the lower fixed cover (202).

4. The explosion-proof soft-seal gate valve structure according to claim 1, characterized in that, The inner wall of the inlet pipe (206) is provided with a through hole (205). A pressure sensor (207) is fixedly connected inside the through hole (205). A signal transmission line (208) is fixedly connected to one end of the pressure sensor (207) away from the inlet pipe (206). The side of the signal transmission line (208) away from the pressure sensor (207) is connected to a signal processor.

5. The explosion-proof soft-seal gate valve structure according to claim 1, characterized in that, The outlet pipe (209) adopts a convergent nozzle design, which is designed to reduce turbulence noise.

6. The explosion-proof soft-seal gate valve structure according to claim 1, characterized in that, The surface of the steel ball body (212) is coated with tungsten carbide hard alloy.

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