Automatic test device and test method for safety valves in closed water systems
By designing an automatic test device for the safety valve of a closed water system and using a spare pump and a test valve to simulate pressure increase conditions to test the automatic pressure relief function of the safety valve, the problem of the existing technology that the automatic pressure relief of the safety valve cannot be truly detected is solved, and the stability of the system and the extension of the equipment life are achieved.
Patent Information
- Application Number
- CN202210122194.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-02-09
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2042-02-09
AI Technical Summary
In the existing technology, the safety valve of the closed water system cannot be automatically tested, resulting in an inability to truly detect whether it can automatically release pressure when the pressure rises sharply, posing a risk of system instability.
An automatic test device for a safety valve in a closed water system is designed. It includes a standby pump, a test valve, and a test connecting pipe. The automatic pressure relief function of the safety valve is tested under the condition of a sudden increase in pressure simulated under normal conditions. The automatic test is realized by the combination of the standby pump and the test valve.
It enables quick and easy detection under daily conditions to determine whether the safety valve can automatically release pressure when the pressure rises sharply, thereby maintaining stable system pressure, reducing equipment risks, extending equipment life, and improving system safety.
Smart Images
Figure CN114459749B_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of safety valves for closed water systems, and in particular relates to an automatic testing device for safety valves for closed water systems and an automatic testing method for safety valves for closed water systems implemented by using the automatic testing device for safety valves for closed water systems. Background Art
[0002] Blast furnace soft water systems are all closed water systems. By supplying fresh industrial water from the return water main via an operating pump to the water supply main, the system circulates and cools key components such as the blast furnace's side cooling staves, large and medium tuyere sleeves, hot blast valves, and furnace bottom. Pressure stability in closed water systems is crucial. Once a pressure surge occurs in the system, it will cause leaks or even bursts in equipment, pipelines, and ancillary facilities, posing a serious threat to the system. To prevent the problem of excessive pressure in the closed water system and the inability of personnel to relieve the pressure in a timely manner, a safety valve can be installed in the closed water system to automatically relieve pressure in the event of a sharp increase in system pressure. However, routine inspections of safety valves only allow for visual inspection and manual testing of the safety valve handle to determine if the safety valve is functioning properly. Automatic testing to determine if the safety valve is open at the pressure relief value is not possible, which introduces significant instability into the closed water system. Summary of the Invention
[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and to this end provide a closed water system safety valve automatic testing device and a closed water system safety valve automatic testing method implemented using the closed water system safety valve automatic testing device.
[0004] The automatic test device for the safety valve of a closed water system of the present invention is installed in a closed water system, wherein the closed water system includes a return water main, a water supply main, and an operating pump. The operating pump is equipped with an operating pump inlet valve, an operating pump outlet valve, an operating pump water inlet pipe, an operating pump water outlet pipe, and an operating pump pressure gauge. The operating pump inlet valve is connected between the return water main and the operating pump water inlet pipe, the operating pump water inlet pipe and the operating pump water outlet pipe are connected to the operating pump, the operating pump water outlet pipe is connected to the operating pump pressure gauge and the operating pump outlet valve, and the operating pump outlet valve is connected to the water supply main, wherein:
[0005] The automatic test device for the safety valve of the closed water system includes: a standby pump, a first test valve, a second test valve, and a test connecting pipe. The standby pump is equipped with a first inlet valve of the standby pump, a second inlet valve of the standby pump, an outlet valve of the standby pump, a water inlet pipe of the standby pump, a water outlet pipe of the standby pump, and a pressure gauge of the standby pump. The first inlet valve of the standby pump is connected to the return water main, the second inlet valve of the standby pump is connected to the water inlet pipe of the standby pump, a safety valve is installed between the first inlet valve of the standby pump and the second inlet valve of the standby pump, the pressure gauge of the standby pump is connected to the water inlet pipe of the standby pump, the water inlet pipe of the standby pump and the water outlet pipe of the standby pump are connected to the standby pump, the outlet valve of the standby pump is connected to the water outlet pipe of the standby pump and the water supply main, the first test valve is connected to the water outlet pipe of the running pump and is located between the outlet valve of the running pump and the pressure gauge of the running pump, the second test valve is connected to the water inlet pipe of the standby pump and is located between the second inlet valve of the standby pump and the pressure gauge of the standby pump, and the test connecting pipe is connected between the first test valve and the second test valve.
[0006] Furthermore, in the above-mentioned automatic test device for the safety valve of the closed water system, when the closed water system is working normally, the standby pump is in a shutdown state, and the first inlet valve of the standby pump, the second inlet valve of the standby pump, the outlet valve of the standby pump, the first test valve and the second test valve are all in a closed state.
[0007] Furthermore, in the above-mentioned automatic test device for the safety valve of a closed water system, the test connecting pipe is a steel pipe or a metal hose.
[0008] The automatic testing method for the safety valve of a closed water system implemented by the automatic testing device for the safety valve of a closed water system of the present invention includes: opening the first test valve and the second test valve, and the water in the outlet pipe of the running pump enters the water inlet pipe of the standby pump through the test connecting pipe. The water pressure displayed on the pressure gauge of the standby pump rises from the initial normal water pressure of 0.5MPa. When the water pressure displayed on the pressure gauge of the standby pump rises to 0.6MPa, check whether the safety valve automatically releases pressure; if the safety valve can automatically release pressure, it is determined that the safety valve is normal, and close the second test valve; if the safety valve cannot automatically release pressure, close the first inlet valve and the second inlet valve of the standby pump and then adjust and replace the safety valve.
[0009] Compared with the prior art, the automatic test device for the safety valve of a closed water system and the automatic test method for the safety valve of a closed water system implemented using the automatic test device for the safety valve of a closed water system of the present invention have the following advantages and beneficial effects: they can quickly and simply detect whether the safety valve can automatically open and release pressure when the pressure in the closed water system suddenly and sharply increases under normal conditions, maintain the stability of the system pressure, provide strong protection for blast furnace production, and at the same time reduce the risks to the equipment when the pressure increases, extend the service life of each equipment, and are simple to operate, can quickly and effectively detect the status of the safety valve in real time, improve the safety and stability of the operation of the closed water system, and solve the technical problem in the prior art that it can only judge whether the safety valve is normal by checking the external conditions and manually operating the handle to release pressure, but cannot actually test automatic pressure relief. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0011] Figure 1 This is a schematic diagram of the structure of the automatic testing device for the safety valve of a closed water system of the present invention. DETAILED DESCRIPTION
[0012] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0013] like Figure 1As shown, the automatic test device for the safety valve of a closed water system of the present invention is installed in a closed water system, which includes a return water main 1, a water supply main 18, and an operating pump 8. The operating pump 8 is equipped with an operating pump inlet valve 6, an operating pump outlet valve 4, an operating pump water inlet pipe 7, an operating pump water outlet pipe 9, and an operating pump pressure gauge 10. The operating pump inlet valve 6 is connected between the return water main 1 and the operating pump water inlet pipe 7. The operating pump water inlet pipe 7 and the operating pump water outlet pipe 9 are connected to the operating pump 8. The operating pump water outlet pipe 9 is connected to the operating pump pressure gauge 10 and the operating pump outlet valve 4. The operating pump outlet valve 4 is connected to the water supply main 18. Industrial fresh water is supplied from the return water main 1 via the operating pump 8 to the water supply main 18, circulating and cooling the main parts of the blast furnace, such as the side cooling staves, the large and middle tuyere jackets, the hot blast valve, and the furnace bottom. Specifically, the water in the return water main 1 enters the running pump 8 through the running pump inlet valve 6 and the running pump water inlet pipe 7 and is pressurized by the running pump 8 and transported to the running pump outlet pipe 9, and then flows to the water supply main 18 through the running pump outlet valve 4.
[0014] The closed water system safety valve automatic test device includes: a standby pump 15, a first test valve 11, a second test valve 13, a test connecting pipe 12, the standby pump 15 is equipped with a standby pump first inlet valve 2, a standby pump second inlet valve 5, a standby pump outlet valve 17, a standby pump water inlet pipe 19, a standby pump water outlet pipe 16, and a standby pump pressure gauge 14. The standby pump first inlet valve 2 is connected to the return water main 1, the standby pump second inlet valve 5 is connected to the standby pump water inlet pipe 19, and the safety valve 3 is installed between the standby pump first inlet valve 2 and the standby pump second inlet valve 5. The pump pressure gauge 14 is connected to the standby pump water inlet pipe 19, the standby pump water inlet pipe 19 and the standby pump water outlet pipe 16 are connected to the standby pump 15, the standby pump outlet valve 17 is connected to the standby pump water outlet pipe 16 and the water supply main 18, the first test valve 11 is connected to the running pump water outlet pipe 9 and is located between the running pump outlet valve 4 and the running pump pressure gauge 10, the second test valve 13 is connected to the standby pump water inlet pipe 19 and is located between the standby pump second inlet valve 5 and the standby pump pressure gauge 14, and the test connecting pipe 12 is connected between the first test valve 11 and the second test valve 13.
[0015] As described above, when the closed water system is operating normally, water at normal water pressure within the return water main 1 passes through the operating pump inlet valve 6 and the operating pump water inlet pipe 7, enters the operating pump 8, is pressurized by the operating pump 8 to the operating water pressure, and is then delivered to the operating pump outlet pipe 9. The water then flows through the operating pump outlet valve 4 to the supply water main 18, circulating and cooling key components of the blast furnace, including the side cooling staves, the large and medium tuyere jackets, the hot blast valve, and the furnace bottom. During this period, the standby pump 15 is shut down, the standby pump first inlet valve 2, the standby pump second inlet valve 5, the standby pump outlet valve 17, the first test valve 11, and the second test valve 13 are all closed. The water pressure within the standby pump outlet pipe 16 and the standby pump inlet pipe 19 is consistent with the normal water pressure within the return water main 1. In the actual situation of the closed water system, the normal water pressure is, for example, 0.5 MPa, and the operating water pressure is, for example, 1.2 MPa.
[0016] Preferably, the test connecting pipe 12 can be a steel pipe, or a metal hose.
[0017] The method for automatically testing a safety valve in a closed water system, implemented using the automatic testing device for a safety valve in a closed water system, includes the following steps: when it is necessary to test whether the safety valve 3 can automatically open and release pressure when the closed water system pressure suddenly and sharply increases, the first test valve 11 and the second test valve 13 are opened, and water in the operating pump outlet pipe 9 enters the standby pump inlet pipe 19 through the test connecting pipe 12. The water pressure indicated by the standby pump pressure gauge 14 increases from the initial normal water pressure of 0.5 MPa. When the water pressure indicated by the standby pump pressure gauge 14 increases to 0.6 MPa, the method checks whether the safety valve 3 automatically releases pressure. If the safety valve 3 can automatically release pressure, it is determined that the safety valve 3 can automatically open and release pressure when the closed water system pressure suddenly and sharply increases. The second test valve 13 is closed, completing the test of the safety valve 3. If the safety valve 3 cannot automatically release pressure, the first inlet valve 2 and the second inlet valve 5 of the standby pump are closed, and the safety valve 3 is adjusted and replaced. Thus, it is possible to truly and effectively test whether the safety valve 3 can automatically open and release pressure when the closed water system pressure suddenly and sharply increases.
[0018] To sum up, the automatic test device and test method of the safety valve of the closed water system of the present invention can quickly and simply detect whether the safety valve can automatically open and release pressure when the pressure of the closed water system suddenly rises sharply under normal conditions, maintain the stability of the system pressure, provide strong protection for blast furnace production, and at the same time reduce the risks brought to the equipment when the pressure rises, and extend the service life of each equipment. The automatic test device and test method of the safety valve of the closed water system of the present invention are simple to operate, can detect the status of the safety valve in real time, quickly and effectively, improve the safety and stability of the operation of the closed water system, and solve the technical problem in the prior art that it can only judge whether the safety valve is normal by checking the external conditions and manually operating the handle to release pressure, but cannot perform actual test automatic pressure relief.
[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this document are all referenced to the placement states shown in the accompanying drawings.
[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. An automatic test device for a safety valve in a closed water system, installed in a closed water system, wherein the closed water system comprises a return water main, a water supply main, and an operating pump, wherein the operating pump is equipped with an operating pump inlet valve, an operating pump outlet valve, an operating pump water inlet pipe, an operating pump water outlet pipe, and an operating pump pressure gauge, wherein the operating pump inlet valve is connected between the return water main and the operating pump water inlet pipe, the operating pump water inlet pipe and the operating pump water outlet pipe are connected to the operating pump, the operating pump water outlet pipe is connected to the operating pump pressure gauge and the operating pump outlet valve, and the operating pump outlet valve is connected to the water supply main. The automatic test device for the safety valve of the closed water system includes: a standby pump, a first test valve, a second test valve, and a test connecting pipe. The standby pump is equipped with a first inlet valve of the standby pump, a second inlet valve of the standby pump, an outlet valve of the standby pump, a water inlet pipe of the standby pump, a water outlet pipe of the standby pump, and a pressure gauge of the standby pump. The first inlet valve of the standby pump is connected to the return water main, the second inlet valve of the standby pump is connected to the water inlet pipe of the standby pump, a safety valve is installed between the first inlet valve of the standby pump and the second inlet valve of the standby pump, the pressure gauge of the standby pump is connected to the water inlet pipe of the standby pump, the water inlet pipe of the standby pump and the water outlet pipe of the standby pump are connected to the standby pump, the outlet valve of the standby pump is connected to the water outlet pipe of the standby pump and the water supply main, the first test valve is connected to the water outlet pipe of the running pump and is located between the outlet valve of the running pump and the pressure gauge of the running pump, the second test valve is connected to the water inlet pipe of the standby pump and is located between the second inlet valve of the standby pump and the pressure gauge of the standby pump, and the test connecting pipe is connected between the first test valve and the second test valve; When the closed water system is operating normally, the standby pump is in a stopped state, and the first inlet valve of the standby pump, the second inlet valve of the standby pump, the outlet valve of the standby pump, the first test valve and the second test valve are all in a closed state; The water pressure in the standby pump outlet pipe and the standby pump inlet pipe is consistent with the normal water pressure in the return water main; The test connecting pipe is a steel pipe or a metal hose.
2. A method for automatically testing a safety valve in a closed water system using the automatic testing device for the safety valve in a closed water system according to claim 1, characterized in that: The automatic test method for the safety valve of the closed water system includes: opening the first test valve and the second test valve, allowing the water in the outlet pipe of the running pump to enter the water inlet pipe of the standby pump through the test connecting pipe, and the water pressure displayed on the standby pump pressure gauge rises from the initial normal water pressure of 0.5MPa. When the water pressure displayed on the standby pump pressure gauge rises to 0.6MPa, checking whether the safety valve automatically releases pressure; if the safety valve can automatically release pressure, it is determined that the safety valve is normal, and the second test valve is closed; if the safety valve cannot automatically release pressure, the first inlet valve and the second inlet valve of the standby pump are closed, and then the safety valve is adjusted and replaced.