Pressure-resistant fatigue test device for pressure gauge

Abstract

The utility model relates to the technical field of pressure gauge inspection, in particular to a pressure-resistant fatigue test device for a pressure gauge, which comprises a test bed, a test mechanism is arranged on the test bed, and the pressure gauge is arranged on the test mechanism. A driving part is fixedly mounted at the top of the test bed, and a knocking assembly is rotationally connected to the top of the test bed; the output end of the driving part is fixedly connected with a first connecting shaft, and a first bevel gear is arranged on the first connecting shaft; the knocking assembly comprises a second connecting shaft, and the first connecting shaft and the second connecting shaft are rotationally connected to the top of the test bed. The pressure-resistant fatigue test device for the pressure gauge has the beneficial effects that when the pressure-resistant fatigue test device for the pressure gauge is used, a plurality of different pressure gauges can be knocked at the same force at the same time, and different vibrations borne by the different pressure gauges are avoided, so that the inspection accuracy is ensured, the inspection efficiency is improved, and meanwhile, the test efficiency is improved. The number of the second connecting seats can be increased or decreased according to the number of the pressure gauges needing to be detected, and the applicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure gauge inspection, in particular to a pressure resistance fatigue test device for a pressure gauge. Background Technique

[0002] Pressure gauges are used to measure the pressure of liquids or gases and are widely used in industrial fields such as petrochemical, power, and pharmaceutical industries. The pressure resistance fatigue test is a key link from the design to the application of pressure gauges. It not only concerns the measurement accuracy but also is an important guarantee for industrial safety. By simulating extreme working conditions and long-term use scenarios, it ensures that the pressure gauge is stable and reliable in complex environments and meets the dual requirements of technology and regulations.

[0003] According to the national standard GB / T 1226-2017 (General Pressure Gauge), before inspecting the pressure gauge, when the pressure is zero, it is necessary to visually observe the position of the pointer of the inspected instrument (tapping the pressure gauge housing once before and once after). For instruments with a stop pin, the pointer should be closely against the stop pin. For instruments without a stop pin, the pointer should be within the zero scale line. And during the inspection, two readings should be taken at each inspection point, one when the load reaches the specified inspection point value steadily (i.e., before tapping the instrument housing), and the other after tapping the instrument housing.

[0004] The purpose of tapping the instrument housing is to verify the sensitivity and stability of the mechanical structure of the pressure gauge by simulating the tiny vibrations in the actual working conditions, eliminate the errors caused by the friction between the internal mechanical structures of the pressure gauge, and ensure the accuracy of the inspection results.

[0005] A pressure resistance fatigue test device for a pressure gauge disclosed in Chinese Patent CN215524917U includes a box body, a horizontal self-propelled box, an air box, and a pressure gauge body. The top outer wall of the air box is fixedly connected to the middle position of the bottom outer wall of the box body, and an air intake mechanism is arranged inside the air box. Connecting columns are fixedly connected to both outer walls at the two ends of the bottom of the box body, a manifold is fixedly connected between the top outer walls of the connecting columns, and a plurality of air outlet pipes are fixedly connected to the top outer wall of the manifold at equal distances. A bottom plate is fixedly connected between the inner walls around the bottom of the box body, and the circumferential outer walls of the air outlet pipes are inserted between the top and bottom outer walls of the bottom plate. An air outlet mechanism is arranged on the top outer wall of the air outlet pipe. A plurality of horizontally arranged self-propelled boxes are fixedly connected to one inner wall of the box body at equal distances, and clamping mechanisms are arranged on the inner walls of the moving grooves opened at both ends of the other outer wall of the horizontal self-propelled box. The inner wall of the box body is filled with an observation liquid.

[0006] However, the existing pressure resistance fatigue test devices for pressure gauges still have the following problems during actual use:

[0007] In the existing pressure gauge pressure resistance fatigue test device, when conducting the pressure resistance fatigue test on the pressure gauge, multiple pressure gauges are often tested simultaneously. Before the test, it is necessary to sequentially tap the outer shells of multiple pressure gauges to observe the position of the pressure gauge pointer when the pressure is zero. During the test, when the load is stable, it is also necessary to sequentially tap the outer shells of multiple pressure gauges to observe the error of the pressure gauge pointer before and after tapping the outer shell. In the prior art, most are manually tapped by the operator in sequence. On the one hand, the different tapping forces on different pressure gauges will cause different vibrations on different pressure gauges, affecting the accuracy of the inspection. On the other hand, sequentially tapping the outer shells of different pressure gauges is time-consuming, resulting in low inspection efficiency. Utility Model Content

[0008] The purpose of the present utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background technology, and provide a pressure resistance fatigue test device for a pressure gauge.

[0009] The purpose of the present utility model is achieved through the following technical solutions: A pressure resistance fatigue test device for a pressure gauge includes a test bench, a test mechanism is arranged on the test bench, and a pressure gauge is arranged on the test mechanism;

[0010] A driving member is fixedly installed on the top of the test bench, and a tapping assembly is rotatably connected to the top of the test bench;

[0011] The output end of the driving member is fixedly connected with a first connecting shaft, and a first helical gear is arranged on the first connecting shaft;

[0012] The tapping assembly includes a second connecting shaft. Both the first connecting shaft and the second connecting shaft are rotatably connected to the top of the test bench. One end of the second connecting shaft is provided with a second helical gear, the second helical gear meshes with the first helical gear, a first connecting seat is arranged on the second connecting shaft, a first elastic member is fixedly connected to the first connecting seat, and the end of the first elastic member away from the first connecting seat is fixedly connected with a tapping block, and the position of the tapping block corresponds to the position of the pressure gauge.

[0013] Preferably, the test mechanism includes an air pump. The output end of the air pump is fixedly connected with a first connecting pipe. A first solenoid valve and an electro-control proportional valve are installed on the first connecting pipe. The end of the first connecting pipe away from the air pump is provided with a second connecting seat. The number of the second connecting seats is multiple. A second connecting pipe is arranged between adjacent second connecting seats. A third connecting pipe is arranged on the second connecting seat away from the first connecting pipe, and a second solenoid valve is installed on the third connecting pipe.

[0014] Preferably, a first connector is fixedly connected to the second connector seat, a second connector is provided on the top of the second connector seat, the pressure gauge is fixedly installed on the top of the second connector seat through the second connector, a cavity is formed inside the second connector seat, a first connecting frame is fixedly connected inside the first connector, a sliding shaft is slidably connected to the first connecting frame, a sealing plate is provided at one end of the sliding shaft located inside the cavity, a contact block is provided at the end of the sliding shaft away from the sealing plate, and a second elastic member is provided between the contact block and the first connecting frame.

[0015] Preferably, third connectors are rotatably connected to both ends of the second connecting pipe, the third connectors are connected to the second connector seat through the first connectors, a second connecting frame is fixedly connected inside the third connector, and a top block is fixedly connected to the middle of the second connecting frame.

[0016] Preferably, the number of the first helical gears is multiple, and the number of the knocking components is the same as that of the first helical gears.

[0017] Preferably, the number of the first connectors is multiple, and the multiple first connectors are circumferentially and arrayedly distributed on the second connector seat.

[0018] Preferably, the position of the top block corresponds to the position of the contact block.

[0019] Compared with the prior art, the present utility model has the following beneficial effects:

[0020] When in use, the pressure gauge pressure resistance fatigue test device can simultaneously knock multiple different pressure gauges with the same force, avoiding different vibrations received by different pressure gauges, thereby ensuring the accuracy of the inspection, improving the inspection efficiency, and at the same time, the number of the second connector seats can be added or reduced according to the number of the pressure gauges to be detected, improving the applicability.

[0021] Parts not involved in the device are the same as those in the prior art or can be realized by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic structural diagram of the first perspective of the present utility model;

[0024] Figure 2 It is a schematic structural diagram of the second perspective of the present utility model;

[0025] Figure 3 Schematic structural diagram of the test bench of the present utility model;

[0026] Figure 4 Schematic structural diagram of the driving member of the present utility model;

[0027] Figure 5 Schematic structural diagram of the knocking assembly of the present utility model;

[0028] Figure 6 Schematic structural diagram of the test mechanism of the present utility model;

[0029] Figure 7 Partial sectional structural diagram of the second connecting seat of the present utility model;

[0030] Figure 8 is Figure 7 Enlarged schematic diagram of the structure at position A in

[0031] Figure 9 Schematic structural diagram of the second connecting pipe of the present utility model;

[0032] Figure 10 is Figure 9 Enlarged schematic diagram of the structure at position B in

[0033] In the figure: 1. Test bench; 11. Driving member; 111. First connecting shaft; 112. First helical gear; 12. Knocking assembly; 121. Second connecting shaft; 122. Second helical gear; 123. First connecting seat; 124. First elastic member; 125. Knocking block; 2. Test mechanism; 21. Air pump; 22. First connecting pipe; 23. First solenoid valve; 24. Electro-control proportional valve; 25. Second connecting seat; 251. First connecting head; 252. Second connecting head; 253. Cavity; 254. First connecting frame; 255. Sliding shaft; 256. Sealing plate; 257. Contact block; 258. Second elastic member; 26. Second connecting pipe; 261. Third connecting head; 262. Second connecting frame; 263. Top block; 27. Third connecting pipe; 28. Second solenoid valve; 3. Pressure gauge. Detailed implementation manners

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] Additional aspects and advantages of the present utility model will be further given in the following description in conjunction with the accompanying drawings, some of which will become apparent from the following description, or will be understood through the practice of the present utility model.

[0036] As Figures 1 to 2 shown, a pressure-resistant fatigue test device for a pressure gauge includes a test bench 1, a test mechanism 2 is arranged on the test bench 1, and a pressure gauge 3 is arranged on the test mechanism 2.

[0037] As Figure 3 shown, a driving member 11 is fixedly installed on the top of the test bench 1. In this embodiment, the driving member 11 is a reduction motor, and a knocking assembly 12 is rotatably connected to the top of the test bench 1.

[0038] As Figure 4 shown, the output end of the driving member 11 is fixedly connected to a first connecting shaft 111, a first helical gear 112 is arranged on the first connecting shaft 111, the number of the first helical gears 112 is multiple, and the number of the knocking assemblies 12 is the same as that of the first helical gears 112.

[0039] As Figures 3 to 5 shown, the knocking assembly 12 includes a second connecting shaft 121, a second helical gear 122, a first connecting seat 123, a first elastic member 124 and a knocking block 125. The first connecting shaft 111 and the second connecting shaft 121 are both rotatably connected to the top of the test bench 1. A second helical gear 122 is arranged at one end of the second connecting shaft 121. The second helical gear 122 meshes with the first helical gear 112. A first connecting seat 123 is arranged on the second connecting shaft 121. A first elastic member 124 is fixedly connected to the first connecting seat 123. One end of the first elastic member 124 away from the first connecting seat 123 is fixedly connected to the knocking block 125, and the position of the knocking block 125 corresponds to the position of the pressure gauge 3.

[0040] As Figure 2 、 Figure 3 and Figure 6As shown in the figure, the test mechanism 2 includes an air pump 21, a first connecting pipe 22, a first solenoid valve 23, an electro-hydraulic proportional valve 24, a second connecting seat 25, a second connecting pipe 26, a third connecting pipe 27, and a second solenoid valve 28. An installation groove is formed on the test bench 1. The air pump 21 is installed in the installation groove on the test bench 1. The output end of the air pump 21 is fixedly connected to the first connecting pipe 22. The first solenoid valve 23 and the electro-hydraulic proportional valve 24 are installed on the first connecting pipe 22. A second connecting seat 25 is provided at one end of the first connecting pipe 22 away from the air pump 21. The number of the second connecting seats 25 is multiple. A second connecting pipe 26 is provided between adjacent second connecting seats 25. A third connecting pipe 27 is provided on the second connecting seat 25 away from the first connecting pipe 22. The second solenoid valve 28 is installed on the third connecting pipe 27. The first solenoid valve 23, the electro-hydraulic proportional valve 24, and the second solenoid valve 28 are all the same as those in the prior art.

[0041] As Figures 7 to 8 shown, a first connecting head 251 is fixedly connected to the second connecting seat 25. The number of the first connecting heads 251 is multiple. The multiple first connecting heads 251 are circumferentially and arrayedly distributed on the second connecting seat 25. A second connecting head 252 is provided at the top of the second connecting seat 25. The pressure gauge 3 is fixedly installed at the top of the second connecting seat 25 through the second connecting head 252. A cavity 253 is formed inside the second connecting seat 25. A first connecting frame 254 is fixedly connected to the inside of the first connecting head 251. A sliding shaft 255 is slidably connected to the first connecting frame 254. A sealing plate 256 is provided at one end of the sliding shaft 255 located inside the cavity 253. A contact block 257 is provided at the end of the sliding shaft 255 away from the sealing plate 256. A second elastic member 258 is provided between the contact block 257 and the first connecting frame 254.

[0042] As Figure 6 、 Figures 8 to 10As shown in the figure, third connectors 261 are rotatably connected to both ends of the second connecting pipe 26. The third connectors 261 are connected to the second connecting seat 25 through the first connectors 251. In this embodiment, the third connectors 261 are threadedly connected to the first connectors 251. A second connecting frame 262 is fixedly connected to the inside of the third connectors 261. A top block 263 is fixedly connected to the middle of the second connecting frame 262. The position of the top block 263 corresponds to the position of the contact block 257. When the third connectors 261 are connected to the second connecting seat 25 through the first connectors 251, the top block 263 pushes the contact block 257, the sliding shaft 255 slides on the first connecting frame 254, and the second elastic member 258 contracts, releasing the seal between the first connector 251 and the cavity 253. When the third connectors 261 are detached from the first connectors 251, the second elastic member 258 rebounds, driving the sliding shaft 255 to slide on the first connecting frame 254 through the top block 263. The sliding shaft 255 drives the sealing plate 256 to reset, and seals between the first connector 251 and the cavity 253.

[0043] The working process is as follows:

[0044] S1. Before use, install the pressure gauge 3 to be tested on the second connecting seat 25 through the second connector 252, and first observe the position of the pointer on the pressure gauge 3.

[0045] S2. Start the driving member 11. The driving member 11 drives the first helical gear 112 to rotate through the first connecting shaft 111. The first helical gear 112 drives the second connecting shaft 121 to rotate through the second helical gear 122. The second connecting shaft 121 drives the first connecting seat 123. The first connecting seat 123 drives the knocking block 125 to rotate through the first elastic member 124, knocking on the outer shell of the pressure gauge 3. After knocking, turn off the driving member 11, and then observe the position of the pointer on the pressure gauge 3 again to obtain the initial reading of the pressure gauge 3. Among multiple pressure gauges 3 to be tested, the pressure gauge 3 with a reading different from that of other pressure gauges 3 is the problematic pressure gauge 3.

[0046] S3. When testing the pressure gauge 3, start the air pump 21, open the first solenoid valve 23, close the second solenoid valve 28, and control the air flow rate through the first connecting pipe 22 through the electro-hydraulic proportional valve 24 to conduct a pressure resistance fatigue test on the pressure gauge 3.

[0047] S4. When the pressure reaches the detection point, close the first solenoid valve 23, maintain the pressure stability, and read the pressure gauge 3.

[0048] S5. After the reading is completed, start the driving member 11 again. The driving member 11 drives the first helical gear 112 to rotate through the first connecting shaft 111. The first helical gear 112 drives the second connecting shaft 121 to rotate through the second helical gear 122. The second connecting shaft 121 drives the first connecting seat 123. The first connecting seat 123 drives the knocking block 125 to rotate through the first elastic member 124, and knocks on the outer shell of the pressure gauge 3. After knocking, turn off the driving member 11, and take the reading of the pressure gauge 3 again after knocking. Among the multiple pressure gauges 3 to be tested, the pressure gauge 3 with a reading different from that of other pressure gauges 3 is the problematic pressure gauge 3;

[0049] S6. After the test is completed, turn off the air pump 21 and open the second solenoid valve 28 to release the gas.

[0050] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A pressure fatigue test device for a pressure gauge, characterized in that: The test bench (1) comprises a test bench (1), wherein a test mechanism (2) is arranged on the test bench (1), and a pressure gauge (3) is arranged on the test mechanism (2); A driving member (11) is fixedly mounted on the top of the test bench (1), and a striking assembly (12) is rotatably connected to the top of the test bench (1); The output end of the driving member (11) is fixedly connected to a first connecting shaft (111), and a first bevel gear (112) is provided on the first connecting shaft (111); The knocking assembly (12) comprises a second connecting shaft (121), the first connecting shaft (111) and the second connecting shaft (121) are both rotatably connected to the top of the test bench (1), a second bevel gear (122) is provided at one end of the second connecting shaft (121), the second bevel gear (122) and the first bevel gear (112) are meshed with each other, a first connecting seat (123) is provided on the second connecting shaft (121), a first elastic member (124) is fixedly connected to the first connecting seat (123), a knocking block (125) is fixedly connected to one end of the first elastic member (124) away from the first connecting seat (123), and the position of the knocking block (125) corresponds to the position of the pressure gauge (3).

2. The pressure gauge pressure fatigue test device according to claim 1, characterized in that: The test mechanism (2) comprises an air pump (21), the output end of the air pump (21) is fixedly connected to a first connecting pipe (22), a first solenoid valve (23) and an electrically controlled proportional valve (24) are installed on the first connecting pipe (22), a second connecting seat (25) is provided at one end of the first connecting pipe (22) away from the air pump (21), a plurality of second connecting seats (25) are provided, a second connecting pipe (26) is provided between adjacent second connecting seats (25), a third connecting pipe (27) is provided on the second connecting seat (25) away from the first connecting pipe (22), and a second solenoid valve (28) is installed on the third connecting pipe (27).

3. The pressure gauge pressure fatigue test device according to claim 2, characterized in that: A first connection head (251) is fixedly connected to the second connection seat (25), a second connection head (252) is arranged on the top of the second connection seat (25), the pressure gauge (3) is fixedly mounted on the top of the second connection seat (25) via the second connection head (252), a cavity (253) is provided inside the second connection seat (25), a first connection frame (254) is fixedly connected inside the first connection head (251), a sliding shaft (255) is slidably connected to the first connection frame (254), a sealing plate (256) is arranged at one end of the sliding shaft (255) located inside the cavity (253), a contact block (257) is arranged at one end of the sliding shaft (255) away from the sealing plate (256), and a second elastic member (258) is arranged between the contact block (257) and the first connection frame (254).

4. The pressure gauge pressure fatigue test device according to claim 3, characterized in that: Both ends of the second connecting tube (26) are rotatably connected to a third connecting head (261); the third connecting head (261) is connected to the second connecting seat (25) via the first connecting head (251); the interior of the third connecting head (261) is fixedly connected to a second connecting frame (262); and the middle of the second connecting frame (262) is fixedly connected to a top block (263).

5. The pressure gauge pressure fatigue test device according to claim 1, characterized in that: The number of the first bevel gears (112) is plural, and the number of the striking components (12) is the same as the number of the first bevel gears (112).

6. The pressure gauge pressure fatigue test device according to claim 3, characterized in that: There are a plurality of first connecting heads (251), and the plurality of first connecting heads (251) are distributed in a circular array on the second connecting seat (25).

7. The pressure gauge pressure fatigue test device according to claim 4, characterized in that: The position of the top block (263) corresponds to the position of the contact block (257).

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