Detection, cleaning and verification integrated device for grease of oxygen pressure gauge

Abstract

The utility model provides an oxygen pressure gauge grease detection, cleaning and verification integrated device, which is characterized in that hardware such as a first valve, a second valve, a transparent container and a medium injection unit with NaOH and phenolphthalein mixed solution are additionally arranged on an oxygen pressure gauge verification table, so that a medium can be injected into a spring tube of an oxygen pressure gauge after being pressurized; then the medium in the spring tube under a certain pressure can unidirectionally flow into a transparent container below at a relatively high speed, so that the oxygen pressure meter with grease can be rapidly detected according to the color change of the red mixed solution; and the oxygen pressure gauge can be repeatedly cleaned subsequently through opening and closing cooperation of all the valves, the standard pressure gauge cannot be affected during cleaning, the cleaning effect is obviously better than that of a traditional method, and the oxygen pressure gauge cleaning efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of measurement of elastic element type pressure gauges, and in particular relates to an integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge. Background Art

[0002] Oxygen pressure gauge generally refers to a general elastic element pressure gauge that measures oxygen pressure. The upper limit of the pressure measurement range is generally not more than 40MPa. It is widely used in industrial production and medical and health fields, such as the hyperbaric oxygen chamber in the hospital. Since high-pressure oxygen may explode when it encounters grease, the oxygen pressure gauge is absolutely prohibited from using oil during use and metrological verification. The verification of oxygen pressure gauge is carried out in accordance with JJG 52-2013. In addition to the conventional indication verification, the oxygen pressure gauge also needs to be checked for grease-free before and after verification. The conventional inspection method is: inject pure warm boiled water into the spring tube, shake it, and throw the water into the device filled with clean water. If no colored oil shadow is observed on the water surface, it is considered that there is no grease. In the actual operation process, this manual detection method is very inefficient, and with the implementation of compulsory inspection and exemption, the number of oxygen pressure gauges that need to be verified by the metrological agency is increasing day by day, and the method of the regulations can no longer meet the daily verification needs of a large number of oxygen pressure gauges.

[0003] Based on this, it is urgent to design an integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge, so as to improve the efficiency of grease detection and verification of the oxygen pressure gauge, and be able to complete the grease cleaning work of the oxygen pressure gauge when necessary. Utility Model Content

[0004] Based on the above defects, the utility model provides an integrated device for detecting, cleaning and calibrating grease of an oxygen pressure gauge to improve the efficiency of grease detection and calibration of the oxygen pressure gauge, and can complete the grease cleaning of the oxygen pressure gauge when necessary, and is suitable for calibration of batch oxygen pressure gauges.

[0005] The utility model discloses an integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge, comprising an oxygen pressure gauge calibration table, a first valve, a second valve, a medium injection unit, a transparent container inlet valve and a transparent container, wherein the first valve and the second valve are arranged on both sides of the oxygen pressure gauge on a hydraulic circuit in the oxygen pressure gauge calibration table, the second valve is arranged on the hydraulic circuit between the oxygen pressure gauge and a standard pressure gauge, the standard pressure gauge is arranged on the hydraulic circuit between a pre-pressure pump and the second valve, a red solution mixed with NaOH and phenolphthalein is arranged in the medium injection unit, the outlet of the pre-pressure pump is connected with the outlet of the medium injection unit, and a transparent container inlet valve and a transparent container connected in sequence are arranged below one end of the hydraulic circuit located on the side of the first valve away from the oxygen pressure gauge.

[0006] Preferably, a container drain valve is also provided below the transparent container.

[0007] Preferably, a calibration bench bracket is provided at the bottom of the oxygen pressure gauge calibration bench.

[0008] Preferably, the connection points between the oxygen pressure gauge and the standard pressure gauge and the hydraulic circuit are respectively provided with a measured end valve and a standard end valve.

[0009] Preferably, a medium injection unit valve is provided at the outlet of the medium injection unit connected to the hydraulic circuit.

[0010] Preferably, the valve type of the medium injection unit is a one-way valve.

[0011] Preferably, it further comprises a pressurizing unit, which is arranged on the hydraulic circuit between the second valve and the standard pressure gauge.

[0012] Preferably, the medium injection unit is made of a transparent material.

[0013] Preferably, the oxygen pressure gauge can be replaced by other elastic element type pressure gauges.

[0014] Preferably, the standard pressure gauge is a digital pressure gauge or an elastic element type precision pressure gauge.

[0015] Compared with the prior art, the integrated device for detecting, cleaning and verifying grease of oxygen pressure gauge provided by the utility model has the following beneficial effects:

[0016] The integrated device of the present invention is provided with hardware such as a first valve, a second valve, a transparent container and a medium injection unit with a mixed solution of NaOH and phenolphthalein on a conventional oxygen pressure gauge calibration table, so that the medium can be pressurized and injected into the spring tube of the oxygen pressure gauge, and then the medium under a certain pressure in the spring tube will flow into the transparent container below at a relatively fast speed in one direction, so that the oxygen pressure gauge with grease can be quickly detected through the color change of the red mixed solution; and subsequently, the oxygen pressure gauge can be repeatedly cleaned by cooperating with the switches of various valves, and the standard pressure gauge will not be affected during cleaning, and the cleaning effect is significantly better than the traditional method, thereby improving the efficiency of cleaning the oxygen pressure gauge; in addition, after cleaning, the calibration of the oxygen pressure gauge can be continued on the oxygen pressure gauge calibration table in cooperation with the standard pressure gauge, and then the valve at the measured end is closed to replace the next oxygen pressure gauge to be calibrated, and the device can be suitable for the detection, cleaning and calibration of batch oxygen pressure gauges. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of an integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge provided by the utility model;

[0019] The accompanying drawings are marked as follows:

[0020] 1. Oxygen pressure gauge calibration table; 2. Oxygen pressure gauge; 3. Valve at the measured end; 4. First valve; 5. Second valve; 6. Standard end valve; 7. Standard pressure gauge; 8. Pre-pressure pump; 9. Check valve; 10. Medium injection unit; 11. Medium injection unit valve; 12. Calibration table bracket; 13. Transparent container inlet valve; 14. Transparent container; 15. Container drain valve; 16. Pressurization unit. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1 As shown, the oxygen pressure gauge calibration table 1 in the prior art generally includes an oxygen pressure gauge 2 and a standard pressure gauge 7 connected through a hydraulic circuit. The connection between the oxygen pressure gauge 2 and the standard pressure gauge 7 and the hydraulic circuit is respectively provided with a measured end valve 3 and a standard end valve 6 for safe instrument replacement. In addition, a pre-pressure pump 8 and a pressurizing unit 16 are provided at one end of the hydraulic circuit close to the standard end valve 6 for pressurizing operation, and a one-way valve 9 is provided at the outlet of the pre-pressure pump to prevent backflow. Through the above components and connection relationship, the oxygen pressure gauge 2 can be calibrated under the standard pressure gauge 7 according to the regulations when the static pressure is balanced.

[0023] Considering that before the calibration work, it is necessary to detect whether there is grease on the oxygen pressure gauge and clean the grease to avoid safety accidents when the pressure gauge measures flammable and explosive gases, and when calibrating a batch of oxygen pressure gauges, the traditional manual detection and cleaning of the grease will greatly reduce the efficiency of the calibration. Therefore, the utility model improves the design of an integrated device for detecting, cleaning and calibrating grease on the original conventional oxygen pressure gauge calibration table.

[0024] See also Figure 1As shown, the utility model of the oxygen pressure gauge grease detection, cleaning and calibration integrated device comprises an oxygen pressure gauge calibration table 1, a first valve 4, a second valve 5, a medium injection unit 10, a transparent container inlet valve 13, a transparent container 14 and a container drain valve 15, the first valve 4 and the second valve 5 are arranged on both sides of the oxygen pressure gauge 2 on the hydraulic circuit of the oxygen pressure gauge calibration table 1, the second valve 5 is arranged on the hydraulic circuit between the oxygen pressure gauge 2 and the standard pressure gauge 7, the standard pressure gauge 7 is arranged on the hydraulic circuit between the pre-pressure pump 8 and the second valve 5, a red solution mixed with NaOH and phenolphthalein is arranged in the medium injection unit 10, the outlet of the pre-pressure pump 8 is connected to the outlet of the medium injection unit 10, so as to pressurize and inject the red solution into the hydraulic circuit, and a transparent container inlet valve 13 and a transparent container 14 connected in sequence are arranged below one end of the hydraulic circuit located on the side of the first valve 4 away from the oxygen pressure gauge, so as to observe whether the red solution changes color, and in addition, a container drain valve 15 is also arranged below the transparent container 14, which can discharge the excess lightened reaction solution after the color change in the transparent container after the grease is cleaned.

[0025] It can be seen that the device of the utility model is provided with hardware such as a first valve, a second valve, a transparent container and a medium injection unit with a red solution mixed with NaOH and phenolphthalein on the oxygen pressure gauge calibration table, so that a colored red solution that can react with acidic grease to neutralize acid and alkali is injected into the spring tube of the oxygen pressure gauge after unidirectional pressurization as a medium, and then the medium under a certain pressure in the spring tube will flow into the transparent container at the lower left side of the hydraulic circuit at a relatively fast speed, so that the oxygen pressure gauge with grease can be quickly observed and detected through the color change of the red mixed solution; and the oxygen pressure gauge can be repeatedly cleaned by cooperating with the switches of various valves, and because the liquid pressure during detection and cleaning is unidirectional ( Figure 1 The standard pressure gauge will not be contaminated with grease during cleaning.

[0026] In another embodiment, an adjustable test stand bracket 12 is provided at the bottom of the oxygen pressure gauge test stand 1 to facilitate free adjustment of the height of the oxygen pressure gauge test stand. The standard pressure gauge 7 can preferably be a digital pressure gauge or an elastic element type precision pressure gauge, which has a higher accuracy than the oxygen pressure gauge being tested.

[0027] In another embodiment, the connection between the oxygen pressure gauge 2 and the standard pressure gauge 7 and the hydraulic circuit is provided with a measured end valve 3 and a standard end valve 6 respectively, so as to be used for safe replacement of the instruments.

[0028] In another embodiment, a medium injection unit valve 11 is provided at the outlet of the medium injection unit 10 connected to the hydraulic circuit to control the injection amount and switch of the red solution.

[0029] In another embodiment, the pressurizing unit 16 is disposed on the hydraulic circuit between the second valve 5 and the standard pressure gauge 7 to perform a pressurizing operation when necessary.

[0030] In order to facilitate understanding of the advantages and working principle of the integrated device for detecting, cleaning and verifying grease in the oxygen pressure gauge of the utility model, the operation mode is now introduced in detail as follows:

[0031] Grease is generally acidic in water, so a red mixed solution of NaOH and phenolphthalein in a certain proportion is prepared as a medium. The solution is red (including pink). The red solution is injected into the tester as a pressure transmission medium. The digital pressure gauge is installed at the standard end of the tester as a standard pressure gauge, and the oxygen pressure gauge is installed at the measured end. The pre-pressure unit and the pressurization unit are operated to make the measured oxygen pressure gauge reach a certain pressure value (such as 50% of the upper limit of measurement). At this time, the medium completely enters the spring tube of the oxygen pressure gauge, and then the second valve is closed, and the transparent container inlet valve and the first valve are opened. At this time, the medium in the spring tube of the oxygen pressure gauge flows into the transparent container in one direction. Observe the color of the medium in the container and compare it with the color of the medium in the medium injection unit. If the colors of the two are exactly the same, it is determined that there is no grease in the oxygen pressure gauge; if the red color in the container becomes lighter or even disappears, it can be considered that there is grease in the spring tube of the oxygen pressure gauge, and there is an acid-base neutralization reaction at this time. When determining that there is grease in the oxygen pressure gauge, it is necessary to clean the grease of the oxygen pressure gauge. At this time, the transparent container drain valve can be opened to discharge all the medium. Close the first valve and the transparent container inlet valve, open the second valve, and repeat the previous procedure: pressurize the oxygen pressure gauge - inject the medium in the oxygen pressure gauge into the transparent container - compare the color of the transparent container and the injection unit medium... Repeat the above steps until there is no difference in color between the two, then it is considered that the grease in the oxygen pressure gauge spring tube has been cleaned. Finally, close the first valve and the transparent container inlet valve, open the second valve, and enter the oxygen pressure indication value verification procedure. This procedure is based on JJG 52-2013 and will not be repeated here.

[0032] Compared with the traditional oxygen pressure gauge grease inspection device, if the grease is to be removed after detection, it is necessary to repeatedly inject clean water for cleaning, which is an extremely long process; the device of the utility model pressurizes the medium and injects it into the spring tube, and then the medium under a certain pressure in the spring tube will flow into the transparent container at a relatively fast speed. The cleaning effect is significantly better than the traditional method, which improves the efficiency of oxygen pressure gauge cleaning and will not contaminate the standard pressure gauge. In addition, the oxygen pressure gauge on the oxygen pressure gauge calibration table can be replaced with other elastic element pressure gauges, such as spring tube pressure gauges, diaphragm pressure gauges, diaphragm box pressure gauges, bellows pressure gauges, etc.

[0033] Note:

[0034] 1. The valve types in the pipelines connecting the pre-pressure pump and the pressurizing unit are all one-way valves, that is, the valve of the medium injection unit is a one-way valve, which prohibits the medium in the pressurizing unit from flowing back to the pre-pressure pump.

[0035] 2. The container material of the medium injection unit can also be set to a transparent material, which is convenient for color comparison with the solution in the transparent container.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model 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 utility model.

Claims

1. An integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge, characterized in that: The invention comprises an oxygen pressure gauge calibration table, a first valve, a second valve, a medium injection unit, a transparent container inlet valve and a transparent container. The first valve and the second valve are arranged on both sides of the oxygen pressure gauge on the hydraulic circuit in the oxygen pressure gauge calibration table. The second valve is arranged on the hydraulic circuit between the oxygen pressure gauge and the standard pressure gauge. The standard pressure gauge is arranged on the hydraulic circuit between the pre-pressure pump and the second valve. A red solution mixed with NaOH and phenolphthalein is arranged in the medium injection unit. The outlet of the pre-pressure pump is connected with the outlet of the medium injection unit. A transparent container inlet valve and a transparent container connected in sequence are arranged below one end of the hydraulic circuit located on the side of the first valve away from the oxygen pressure gauge.

2. The integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge according to claim 1, characterized in that: A container sewage discharge valve is also arranged below the transparent container.

3. The integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge according to claim 1, characterized in that: A calibration stand bracket is provided at the bottom of the oxygen pressure gauge calibration stand.

4. The integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge according to claim 1, characterized in that: The connection points between the oxygen pressure gauge and the standard pressure gauge and the hydraulic circuit are respectively provided with a measured end valve and a standard end valve.

5. The integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge according to claim 1, characterized in that: A medium injection unit valve is provided at the outlet of the medium injection unit connected to the hydraulic circuit.

6. The integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge according to claim 1, characterized in that: A one-way valve for preventing backflow is arranged at the outlet of the pre-pressure pump, and the valve of the medium injection unit is also a one-way valve.

7. The integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge according to claim 1, characterized in that: The device also includes a pressurizing unit, which is arranged on the hydraulic circuit between the second valve and the standard pressure gauge.

8. The integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge according to claim 1, characterized in that: The medium injection unit is made of transparent material.

9. The integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge according to claim 1, characterized in that: The oxygen pressure gauge is replaced by other elastic element type pressure gauges.

10. The integrated device for detecting, cleaning and verifying grease of an oxygen pressure gauge according to claim 1, characterized in that: The standard pressure gauge is a digital pressure gauge or an elastic element type precision pressure gauge.

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