A pressure gauge with shock absorption function

Abstract

The present invention relates to the technical field of pressure gauges, and specifically to a pressure gauge with a shock-absorbing function, comprising a movement assembly and an anti-seismic assembly, wherein the movement assembly comprises a needle shaft rotatably arranged on a pressure gauge frame, the driving section of the needle shaft is located inside the frame and is transmission-connected to a driving member, the assembly section of the needle shaft extends from the frame, and a pointer is assembled at the front end of the assembly section; the anti-seismic assembly comprises a fixed sleeve and a suspension sleeve, both of which are coaxially arranged with the needle shaft, the suspension sleeve is movably sleeved on the assembly section of the needle shaft, a first filling gap is formed between the inner wall of the suspension sleeve and the needle shaft, the fixed sleeve is sleeved on the periphery of the suspension sleeve, and the end of the fixed sleeve is fixedly connected to the frame, a second filling gap is formed between the inner wall of the fixed sleeve and the outer wall of the suspension sleeve; the first filling gap and the second filling gap are both filled with damping oil.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure gauges, and in particular to a pressure gauge with a shock-absorbing function. Background Art

[0002] Pressure gauges are widely used in pressure vessels and pressure pipes. Some of these pressure gauges are used on equipment with high-frequency vibrations. The vibration of the equipment will cause the pressure gauge pointer to also generate high-frequency vibrations, making it impossible to accurately observe the pressure. There are two existing solutions. One is to fill the pressure gauge with a large amount of resistance oil, which has limited shock absorption effect. The other is to change the mechanical structure of the pressure gauge movement. This method can provide some shock absorption, but the improved movement structure is complex, costly, and has poor adaptability. Pressure gauges usually use coil springs as reset elements, but coil springs have low precision and are prone to irreversible damage during long-term use. As a real-time detection instrument, the pressure gauge should not be frequently disassembled for inspection and maintenance. In addition, the components inside the pressure gauge are relatively delicate, and the maintenance risk is relatively high.

[0003] In view of the above situation, in order to overcome the above technical problems, the present invention designs a pressure gauge with a shock absorption function to solve the above technical problems. Summary of the Invention

[0004] In order to achieve the above technical objectives, the present invention provides the following technical solutions:

[0005] The present invention provides a pressure gauge with a shock-absorbing function. The pressure gauge with a shock-absorbing function includes a case, a frame and a movement assembly arranged in the case, the pressure gauge also including a shock-resistant assembly, the movement assembly includes a needle shaft rotatably arranged on the frame, the driving section of the needle shaft is located inside the frame and is transmission-connected to the driving member, the assembly section of the needle shaft extends from the frame, and the pointer is assembled at the front end of the assembly section; the shock-resistant assembly includes a fixed sleeve and a suspension sleeve, the fixed sleeve and the suspension sleeve are both coaxially arranged with the needle shaft, the suspension sleeve is movably sleeved on the assembly section of the needle shaft, a first filling gap is formed between the inner wall of the suspension sleeve and the needle shaft, the fixed sleeve is sleeved on the periphery of the suspension sleeve, and the end of the fixed sleeve is fixedly connected to the pressure gauge frame, a second filling gap is formed between the inner wall of the fixed sleeve and the outer wall of the suspension sleeve; the first filling gap and the second filling gap are both filled with damping oil.

[0006] Preferably, the suspension sleeve is a thin-walled hollow structure, with a first inner hole and a first cylindrical hole coaxially connected thereto, and the front end of the needle shaft passes through the first cylindrical hole.

[0007] Preferably, the suspension sleeve is axially segmented into a reduced diameter section and a constant diameter section, wherein the reduced diameter section corresponds to the first inward-retracting hole, and the constant diameter section corresponds to the first cylindrical hole. The outer diameter of the reduced diameter section gradually decreases from the open end to the connecting end, and the open end is abutted against the frame.

[0008] Preferably, the first filling gap includes a conical section and an annular section, the conical section is defined by the reduced diameter section of the suspension sleeve and the needle shaft, and the annular section is defined by the equal diameter section of the suspension sleeve and the needle shaft; the conical section serves as a pre-storage chamber for the damping oil.

[0009] Preferably, the fixing sleeve is a thick-walled hollow structure, and a second inner hole and a second cylindrical hole are coaxially connected therein, wherein the second inner hole corresponds to the reduced diameter section, and the second cylindrical hole corresponds to the equal diameter section, and the equal diameter section passes through the second cylindrical hole.

[0010] Preferably, the diameter of the second inward-reduced hole matches the outer diameter of the reduced-diameter section, the diameter of the second cylindrical hole matches the outer diameter of the equal-diameter section, and the circumferential and axial gap sizes of the second filling seam remain consistent.

[0011] Preferably, the fixing sleeve is axially segmented with a coaxial fixing section and an extension section, an end of the fixing section is fixedly connected to the frame, and an outer diameter of the fixing section is larger than an outer diameter of the extension section.

[0012] Preferably, the movement assembly further comprises a sleeve, which is fixedly sleeved on the drive section of the needle shaft; a first transmission tooth is provided on the outer wall of the sleeve, and a transmission assembly is provided between the sleeve and the drive member.

[0013] Preferably, the transmission assembly includes a swing arm, which is rotatably arranged in the frame through a support shaft. The swing arm includes a driving end and a linkage end respectively arranged on both sides of the support shaft. The driving end is connected to the driving member, and the linkage end is provided with a second transmission tooth that engages with the first transmission tooth.

[0014] Preferably, a pressure gauge with a shock-absorbing function further includes an elastic component, which is used to replace the coil spring in the pressure gauge of the prior art. The elastic component includes a sleeve, a fixed disk and a rotating disk. The sleeve is installed on the side of the shaft sleeve. The sleeve is used to convert part of the kinetic energy into pressure potential energy during the movement of the swing arm, so that when the swing arm has no external support, the pressure potential energy is converted back into kinetic energy to help reset, thereby playing the role of the coil spring of the prior art. The fixed disk and the rotating disk are installed inside the sleeve.

[0015] Preferably, the fixed disk and the rotating disk are arranged parallel to each other; the outer surface of the sleeve is installed with rotating teeth, and the rotating teeth cooperate with the swing arm to drive the rotating teeth to rotate during the movement of the swing arm, thereby further rotating the sleeve; a central shaft is installed inside the sleeve, and a limiting block is installed at the bottom of the central shaft; a spiral driving groove is opened on the inner surface of the sleeve, which cooperates with the limiting effect of the central shaft to drive the rotating disk to move toward the position of the fixed disk; the cross-sectional shape of the driving groove is semicircular, thereby reducing the friction between the driving groove and the driving ball and increasing the service life.

[0016] Preferably, the fixed disk includes a reflux channel, a ventilation channel, an overflow ball and a blocking frame; the reflux channel is opened in the center of the fixed disk, so that the high-pressure gas stored in the space above the fixed disk enters the lower part through the reflux channel, thereby achieving air pressure balance, and the circumferential array of the ventilation channels is opened around the reflux channel, and the vertical cross-sectional shape of the ventilation channel is set to a truncated cone with a small upper part and a large lower part, so as to ensure rapid gas circulation, the overflow ball is installed in the upper part of the ventilation channel, and the diameter value of the overflow ball is set to be slightly larger than the minimum diameter value of the ventilation channel, so as to ensure that the overflow ball can only move in the upper part of the ventilation channel, and the blocking frame is installed above the ventilation channel, and the blocking frame is set to a cross shape.

[0017] Preferably, a mating block is installed on the top of the rotating disk, and the diameter of the mating block is consistent with the diameter of the reflux channel. A driving ball is installed on the side of the rotating disk, and the driving ball is used to be engaged in the driving groove to serve as the power source for the movement of the rotating disk.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The anti-seismic component has a simple structure and low cost. The anti-seismic component is directly mounted on the needle shaft, which is easy to assemble and highly adaptable. It can adapt to different types of pressure gauges. The anti-seismic component consists of a fixed sleeve and a suspension sleeve, which cooperate with the needle shaft to form two filling gaps for filling damping oil, providing double buffering and effectively improving the shock absorption effect.

[0020] 2. The suspension sleeve is a thin-walled hollow structure and is movably mounted on the needle shaft. Together with the damping oil in the two filling gaps, it can provide a more effective buffering force for the needle shaft. The fixed sleeve is a thick-walled hollow structure and is mounted on the periphery of the suspension sleeve and fixed to the frame, which can increase the vibration resistance and thus improve the anti-seismic effect. The suspension sleeve is axially segmented with a reduced diameter section and a constant diameter section, so that the first filling gap forms a conical section and an annular section, and the conical section can be used as a pre-storage chamber for the damping oil to avoid frequent oil replenishment. The second inner hole of the fixed sleeve, together with the reduced diameter section, can achieve axial limitation of the suspension sleeve, making assembly convenient.

[0021] 3. The elastic component can replace the coil spring in the existing technology, which greatly improves the service life of the pressure gauge and reduces the display error caused by the long-term use of the coil spring. Not only the durability of the pressure gauge is improved, but also the accuracy value is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific embodiments or the description of the prior art. 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 any creative work.

[0023] The above and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the movement assembly and the anti-seismic assembly of the present invention;

[0026] Figure 3 is a cross-sectional view of the movement assembly and the anti-seismic assembly of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the fixing sleeve of the present invention;

[0028] Figure 5 This is a schematic diagram of the suspension sleeve structure of the present invention;

[0029] Figure 6 Schematic diagram of the external structure of the sleeve of the present invention;

[0030] Figure 7 This is an exploded view of the internal structure of the elastic component of the present invention;

[0031] Figure 8 It is a schematic diagram of the internal structure of the fixed disk of the present invention;

[0032] Figure 9 Schematic diagram of the internal structure of the sleeve of the present invention;

[0033] Figure 10 It is a cross-sectional view of the elastic component of the present invention.

[0034] In the figure: 10, frame; 21, needle shaft; 22, sleeve; 30, fixed sleeve; 31, fixed section; 32, extension section; 33, second retracted hole; 40, suspension sleeve; 41, reduced diameter section; 42, equal diameter section; 43, first retracted hole; 51, first filling gap; 511, tapered section; 512, annular section; 52, second filling gap; 61, swing arm; 611, driving end; 612, linkage end; 62, support shaft; 71, sleeve; 711, rotating tooth; 712, center axis; 713, limit block; 714, driving groove; 72, fixed disk; 721, return channel; 722, ventilation channel; 723, overflow ball; 724, blocking frame; 73, rotating disk; 731, matching block; 732, driving ball. DETAILED DESCRIPTION

[0035] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0036] like Figures 1 to 10 As shown, a pressure gauge with a shock-absorbing function includes a case and a frame 10, a movement assembly and an anti-seismic assembly arranged in the case. The case is circular, and a dial is also provided in the case. A joint is also connected to the outside of the case. The movement assembly includes a needle shaft 21 and a sleeve 22 rotatably arranged on the frame 10. The driving section of the needle shaft 21 is located inside the frame 10 and is transmission-connected to the driving member. The assembly section of the needle shaft 21 extends from the frame 10, and the pointer is assembled at the front end of the assembly section; the sleeve 22 is mounted on the driving section of the needle shaft 21; a transmission assembly is provided between the sleeve 22 and the driving member; the transmission assembly includes a swing arm 61, which is rotatably arranged in the frame 10 through a support shaft 62. The swing arm 61 includes a driving end 611 and a linkage end 612 respectively arranged on both sides of the support shaft 62. The driving end 611 is drivingly connected to the driving member, and a transmission tooth is provided on the linkage end 612.

[0037] like Figure 1 As shown, the anti-seismic assembly includes a fixed sleeve 30 and a floating sleeve 40. The fixed sleeve 30 and the floating sleeve 40 can be made of metal, plastic, or other materials. In this embodiment, both are made of metal. The fixed sleeve 30 and the floating sleeve 40 are coaxially arranged with the needle shaft 21. The floating sleeve 40 is movably mounted on the assembly section of the needle shaft 21, forming a first filling gap 51 between the inner wall of the floating sleeve 40 and the needle shaft 21. The fixed sleeve 30 is mounted on the periphery of the floating sleeve 40, and the end of the fixed sleeve 30 is fixedly connected to the pressure gauge frame 10. A second filling gap 52 is formed between the inner wall of the fixed sleeve 30 and the outer wall of the floating sleeve 40. Both the first filling gap 51 and the second filling gap 52 are filled with damping oil. The fixed sleeve 30 and the floating sleeve 40 cooperate with the needle shaft 21 to form two filling gaps for damping oil, providing dual cushioning and effectively improving the shock absorption effect.

[0038] like Figure 5 As shown, the suspension sleeve 40 is a thin-walled hollow sleeve, and a first inner hole 43 and a first cylindrical hole are coaxially connected therein. The front end of the needle shaft 21 passes through the first cylindrical hole. The suspension sleeve 40 adopts a thin-walled hollow structure and is movably sleeved on the needle shaft 21. The damping oil in the two filling gaps can provide a more effective buffering force for the needle shaft 21. The suspension sleeve 40 is divided into a reduced diameter section 41 and a constant diameter section 42 along the axial direction, wherein the reduced diameter section 41 corresponds to the first inner hole 43, and the constant diameter section 42 corresponds to the first cylindrical hole. The outer diameter of the reduced diameter section 41 gradually decreases from the open end to the connecting end, and the open end is in contact with the frame 10. The first filling gap 51 includes a tapered section 511 and an annular section 512. The tapered section 511 is defined by the reduced diameter section 41 of the suspension sleeve 40 and the needle shaft 21, and the annular section 512 is defined by the constant diameter section 42 of the suspension sleeve 40 and the needle shaft 21. The volume of the tapered section 511 is greater than that of the annular section 512. The tapered section 511 serves as a pre-storage chamber for damping oil to avoid frequent oil replenishment and is more convenient to use.

[0039] like Figure 4 As shown, the fixing sleeve 30 is a thick-walled hollow sleeve, and a second inner-retracted hole 33 and a second cylindrical hole are coaxially connected therein, wherein the second inner-retracted hole 33 corresponds to the reduced diameter section 41 to axially limit the suspension sleeve 40 and achieve quick assembly, and the second cylindrical hole corresponds to the equal diameter section 42, and the equal diameter section 42 passes through the second cylindrical hole; the aperture of the second inner-retracted hole 33 is adapted to the outer diameter of the reduced diameter section 41, and the aperture of the second cylindrical hole is adapted to the outer diameter of the equal diameter section 42, and the second filling seam 52 has consistent circumferential and axial gap sizes to provide a more stable buffering force; the fixing sleeve 30 is axially segmented with a coaxial fixing section 31 and an extension section 32, the end of the fixing section 31 is fixedly connected to the frame 10, and the outer diameter of the fixing section 31 is larger than the outer diameter of the extension section 32, the fixing sleeve 30 is a thick-walled hollow structure, which is sleeved on the periphery of the suspension sleeve 40 and fixedly connected to the frame 10, which can increase vibration resistance and thus improve the anti-seismic effect.

[0040] like Figure 6 and Figure 7As shown, a pressure gauge with a shock-absorbing function also includes an elastic component, which is used to replace the coil spring in the pressure gauge of the prior art. The elastic component includes a sleeve 71, a fixed disk 72 and a rotating disk 73. The sleeve 71 is installed on the side of the shaft sleeve 22. The sleeve 71 is used to convert part of the kinetic energy into pressure potential energy during the movement of the swing arm 61, so that when the swing arm 61 has no external support, the pressure potential energy is converted back into kinetic energy to help reset, thereby playing the role of the coil spring of the prior art. The fixed disk 72 and the rotating disk 73 are installed inside the sleeve 71, and the fixed disk 72 and the rotating disk 73 are arranged parallel to each other; the fixed disk 72 is used to separate the internal space of the sleeve 71 to form two independent and sealed spaces, and the rotating disk 73 is used to push the gas to move in the two spaces, thereby realizing the function of energy conversion. The outer surface of the sleeve 71 is installed with rotating teeth 711. The locking cam 712 of the locking cam 713 is fixed to the locking cam 714 so that the locking cam 714 can be locked without locking at the locking cam 714.

[0041] like Figure 8As shown, the fixed disk 72 includes a return channel 721, a ventilation channel 722, an overflow ball 723 and a blocking frame 724; the return channel 721 is opened at the center of the fixed disk 72, and the return channel 721 is used to allow the high-pressure gas stored in the space above the fixed disk 72 to enter the lower part through the return channel 721 in the absence of external force, thereby achieving air pressure balance, and the circumferential array of the ventilation channels 722 is opened around the return channel 721, and the ventilation channels 722 are used to allow the gas to pass through and enter the fixed disk during the movement of the rotating disk 73 to the fixed disk 72. In the upper space of the disc 72, the vertical cross-sectional shape of the ventilation channel 722 is set to a truncated cone with a small upper part and a large lower part to ensure rapid gas circulation. The overflow ball 723 is installed in the upper part of the ventilation channel 722, and the diameter value of the overflow ball 723 is set to be slightly larger than the minimum diameter value of the ventilation channel 722 to ensure that the overflow ball 723 can only move in the upper part of the ventilation channel 722. The blocking frame 724 is installed above the ventilation channel 722, and the blocking frame 724 is set to a cross shape. The cross-shaped blocking frame 724 is used to limit the range of movement of the overflow ball 723.

[0042] like Figure 9 As shown, a mating block 731 is installed on the rotating disk 73. The mating block 731 is used to squeeze the mating block 731 downward by the high-pressure space above the fixed disk 72 when there is no external force driving it, thereby achieving rapid reset. The diameter value of the mating block 731 is consistent with the diameter value of the reflux channel 721. A driving ball 732 is installed on the side of the rotating disk 73. The driving ball 732 is used to be clamped in the driving groove 714 to serve as a power source for the movement of the rotating disk 73.

[0043] The movement process of the elastic component: the swing arm 61 swings and drives the rotating gear 711 to rotate, thereby rotating the sleeve 71. During the rotation of the sleeve 71, the driving groove 714 provided inside drives the driving ball 732 to move, thereby causing the rotating disk 73 to move in the direction of the fixed disk 72. Under the limiting effect of the central axis 712, the rotating disk 73 can only approach the fixed disk 72 in parallel. At this time, the gas enters the sealed space formed by the fixed disk 72 and the sleeve 71 through the ventilation channel 722 and the return channel 721 at the same time, forming a high-pressure area. After a period of time, the matching block 731 will enter the return channel 721, so that the gas can only enter the high-pressure space through the ventilation channel 722. At this time, the efficiency of air entry is reduced;

[0044] When the pipeline pressure detected by the pressure gauge decreases, the external force brought by the swing arm 61 will gradually disappear. Since the diameter of the overflow ball 723 is slightly larger than the minimum diameter of the ventilation channel 722, the gas cannot flow out through the ventilation channel 722. The high pressure continues to squeeze the matching block 731, causing it to drive the rotating disk 73 to move downward. With the cooperation of the driving groove 714 and the driving ball 732, the sleeve 71 rotates in the opposite direction until the air pressure on both sides of the fixed disk 72 approaches the same, and the reset is completed.

[0045] The foregoing description is merely an excerpt from the disclosure, which modifications may be made to the invention in light of the above detailed description. The terms used in the appended claims should not be construed to limit the invention to the specific embodiments disclosed in the specification. Rather, the scope of the invention is to be determined entirely by the appended claims, which are to be construed in accordance with established doctrines of claim interpretation.

Claims

1. A pressure gauge with a shock-absorbing function, comprising a case, a frame (10) and a movement assembly arranged in the case, characterized in that: The pressure gauge further comprises an anti-vibration assembly, wherein the movement assembly comprises a needle shaft (21) rotatably arranged on a frame (10), a driving section of the needle shaft (21) is located inside the frame (10) and is transmission-connected to a driving member, an assembly section of the needle shaft (21) extends from the frame (10), and a pointer is assembled at the front end of the assembly section; the anti-vibration assembly comprises a fixed sleeve (30) and a suspension sleeve (40), and the fixed sleeve (30) and the suspension sleeve (40) are both coaxially arranged with the needle shaft (21). The suspension sleeve (40) is movably sleeved on the assembly section of the needle shaft (21), and a first filling gap (51) is formed between the inner wall of the suspension sleeve (40) and the needle shaft (21). The fixed sleeve (30) is sleeved on the periphery of the suspension sleeve (40), and the end of the fixed sleeve (30) is fixedly connected to the frame (10), and a second filling gap (52) is formed between the inner wall of the fixed sleeve (30) and the outer wall of the suspension sleeve (40); the first filling gap (51) and the second filling gap (52) are both filled with damping oil; The invention also includes an elastic component, which includes a sleeve (71), a fixed disk (72) and a rotating disk (73). The sleeve (22) is installed on the driving section of the needle shaft (21). The sleeve (71) is installed on the side of the sleeve (22). The fixed disk (72) and the rotating disk (73) are installed inside the sleeve (71). The fixed disk (72) and the rotating disk (73) are parallel to each other. The outer surface of the sleeve (71) is installed with a rotating tooth (711). The interior of the sleeve (71) is installed with a central shaft (712). The bottom of the central shaft (712) is installed with a limit block (713). The inner surface of the sleeve (71) is provided with a spiral driving groove (714). The cross-sectional shape of the driving groove (714) is semicircular. A driving ball (732) is installed on the side of the rotating disk (73).

2. A pressure gauge with a shock-absorbing function according to claim 1, characterized in that: The suspension sleeve (40) is a thin-walled hollow structure, and a first inner hole (43) and a first cylindrical hole are coaxially connected thereto. The front end of the needle shaft (21) passes through the first cylindrical hole.

3. A pressure gauge with a shock-absorbing function according to claim 2, characterized in that: The suspension sleeve (40) is divided into a reduced diameter section (41) and a constant diameter section (42) along the axial direction, wherein the reduced diameter section (41) corresponds to the first inner-retracting hole (43), and the constant diameter section (42) corresponds to the first cylindrical hole. The outer diameter of the reduced diameter section (41) gradually decreases from the open end to the connecting end, and the open end is in contact with the frame (10).

4. A pressure gauge with a shock-absorbing function according to claim 3, characterized in that: The first filling gap (51) comprises a tapered section (511) and an annular section (512); the tapered section (511) is defined by the reduced diameter section (41) of the suspension sleeve (40) and the needle shaft (21); and the annular section (512) is defined by the equal diameter section (42) of the suspension sleeve (40) and the needle shaft (21); the tapered section (511) serves as a pre-storage chamber for damping oil.

5. The pressure gauge with shock absorption function according to claim 4, characterized in that: The fixing sleeve (30) is a thick-walled hollow structure, and is provided with a second inner hole (33) and a second cylindrical hole that are coaxially connected, wherein the second inner hole (33) corresponds to the reduced diameter section (41), and the second cylindrical hole corresponds to the equal diameter section (42), and the equal diameter section (42) passes through the second cylindrical hole.

6. The pressure gauge with shock absorption function according to claim 5, characterized in that: The aperture of the second inward-retracting hole (33) is adapted to the outer diameter of the diameter-reducing section (41), the aperture of the second cylindrical hole is adapted to the outer diameter of the equal-diameter section (42), and the second filling gap (52) maintains consistent circumferential and axial clearance sizes.

7. The pressure gauge with shock absorption function according to claim 6, characterized in that: The fixing sleeve (30) is axially segmented and provided with a coaxial fixing section (31) and an extension section (32). The end of the fixing section (31) is fixedly connected to the frame (10), and the outer diameter of the fixing section (31) is larger than the outer diameter of the extension section (32).

8. The pressure gauge with shock absorption function according to claim 1, characterized in that: The fixed disk (72) includes a reflux channel (721), a ventilation channel (722), an overflow ball (723) and a blocking frame (724); the reflux channel (721) is opened at the center of the fixed disk (72), the ventilation channels (722) are arranged in a circular array around the reflux channel (721), the vertical cross-section of the ventilation channel (722) is set to be a truncated cone with a small upper part and a large lower part, the overflow ball (723) is installed in the upper part of the ventilation channel (722), and the blocking frame (724) is installed above the ventilation channel (722), and the blocking frame (724) is set to be a cross shape.

9. The pressure gauge with shock absorption function according to claim 8, characterized in that: A matching block (731) is installed on the rotating disk (73), and the diameter of the matching block (731) is consistent with the diameter of the reflux channel (721).

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