Memory pressure gauge and pressure device

Abstract

The utility model discloses a memory pressure gauge and a pressure device, the memory pressure gauge comprises a shell, a cover plate, a measuring assembly, a rotating assembly, a second pointer and damping grease, and one end of the shell is open; the cover plate is arranged at the opening of the shell; the measuring assembly comprises a first pointer which is rotatably arranged in the shell; the rotating assembly comprises a rotating shaft rotationally connected with the cover plate; the second pointer is located in the shell and arranged at the end, located in the shell, of the rotating shaft, and the second pointer is rotationally connected with the rotating shaft. The damping grease is arranged at the joint of the second pointer and the rotating shaft; the first pointer is also used for pushing the second pointer to rotate. The damping grease can provide certain damping, the first pointer pushes the second pointer to overcome the damping and rotate to any angle, after the first pointer returns, the second pointer is kept at the position due to the adhesion of the damping grease, the damping grease can also improve the lubrication degree of the rotating shaft and the second pointer, and the phenomenon that the pointers are stuck or delayed cannot occur.

Description

Technical Field

[0001] The present application relates to the field of pressure instruments, and in particular to a memory pressure gauge and a pressure device. Background Art

[0002] A memory pressure gauge is used in unattended conditions to accurately record the highest pressure value measured by the pressure gauge at the measurement site. As the pressure of the measured medium increases, the pressure pointer of a memory pressure gauge rotates, also causing the memory needle to rotate. When the pressure of the measured medium decreases and the pressure pointer drops, the memory pointer remains in place. The memory pointer is rotatably connected to the rotating shaft, and through the pressure provided by a spring mounted on the shaft, one side of the memory pointer is pressed against the end of the shaft and maintained at the maximum test pressure. Due to the presence of the spring, the pressure pointer must overcome the friction between the memory pointer and the shaft as it rotates. When the friction acting on the memory pointer is greater than the thrust provided by the pressure pointer at the current pressure, the pressure display pointer will indicate inaccurately, freeze, or lag. Utility Model Content

[0003] The present application proposes a memory pressure gauge and a pressure device, aiming to solve the problem of pressure gauge pointer jamming.

[0004] This application proposes a memory pressure gauge, comprising:

[0005] A shell having an opening at one end;

[0006] a cover plate, arranged at the opening of the shell;

[0007] A measuring assembly, comprising a first pointer rotatably disposed in the housing;

[0008] A rotating assembly, comprising a rotating shaft rotatably connected to the cover plate;

[0009] a second pointer, located in the housing and disposed at one end of the rotating shaft located in the housing, the second pointer being rotatably connected to the rotating shaft;

[0010] Damping grease, provided at the connection between the second pointer and the rotating shaft;

[0011] The first pointer is further used to push the second pointer to rotate.

[0012] In some embodiments, the rotating assembly further includes a sleeve disposed on the cover plate, the rotating shaft includes a knob rotatably connected to the sleeve, and a connecting piece disposed at an end of the knob, the connecting piece being rotatably connected to the second pointer.

[0013] In some embodiments, a first step is provided at one end of the sleeve, the rotating assembly further includes a nut provided at the other end of the sleeve, and the cover plate is provided between the first step and the nut.

[0014] In some embodiments, a second step is provided at one end of the knob, and a retaining spring is provided at the other end, and the sleeve is provided between the second step and the retaining spring.

[0015] In some embodiments, a third step is provided at one end of the connecting member, and the other end is connected to the knob, and the second pointer is located between the third step and the knob.

[0016] In some embodiments, the knob is provided with a mounting hole for mounting the connector, and a countersunk hole is further provided at the end of the mounting hole, and a gap for accommodating the damping grease is formed between the connector and the countersunk hole.

[0017] In some embodiments, the memory pressure gauge further includes a first sealing ring disposed between the first step and the cover plate; the memory pressure gauge further includes a second sealing ring disposed in the shaft sleeve and sleeved on the outer periphery of the knob.

[0018] In some embodiments, the memory pressure gauge further includes a dial disposed in the housing, the first pointer is disposed between the dial and the cover plate, and the memory pressure gauge further includes a stopper disposed on the dial, the stopper being used to limit the first pointer from rotating in a first direction.

[0019] In some embodiments, the cover plate is sealed to the housing, and a filling liquid is provided in the housing.

[0020] The present application also proposes a pressure device, comprising the above-mentioned memory pressure gauge.

[0021] The memory pressure gauge in this application includes a housing, a cover, a measuring assembly, a rotating assembly, a second pointer, and damping grease. One end of the housing is opened; the cover is arranged at the opening of the housing; the measuring assembly includes a first pointer rotatably arranged in the housing; the rotating assembly includes a rotating shaft rotatably connected to the cover; the second pointer is located in the housing and is arranged at one end of the rotating shaft located in the housing, and the second pointer is rotatably connected to the rotating shaft; the damping grease is arranged at the connection between the second pointer and the rotating shaft; the first pointer is also used to push the second pointer to rotate. The damping grease can provide a certain amount of damping. The first pointer pushes the second pointer to overcome the damping and rotate to any angle. After the first pointer returns to its position, the second pointer is held in this position by the viscosity of the damping grease. The damping grease can also improve the lubrication of the rotating shaft and the second pointer, and there will be no pointer jamming or hysteresis. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a memory pressure gauge in one embodiment of the present application;

[0023] Figure 2 for Figure 1 A cross-sectional view of a memory pressure gauge in an embodiment;

[0024] Figure 3 for Figure 1 Schematic diagram of the structure of the rotating assembly in the embodiment.

[0025] The purpose, features and advantages of this application will be further explained with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the schemes in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments in this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0028] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element.

[0029] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] This application proposes a memory pressure gauge, referring to Figures 1 to 3The memory pressure gauge includes: a housing 1 with an opening at one end; a cover plate 2 disposed at the opening of the housing 1; a measuring assembly including a first pointer 3 rotatably disposed in the housing 1; a rotating assembly 4 including a shaft 40 rotatably connected to the cover plate 2; a second pointer 5 located in the housing 1 and disposed at one end of the shaft 40 located in the housing 1, the second pointer 5 being rotatably connected to the shaft 40; and damping grease 6 disposed at the connection between the second pointer 5 and the shaft 40. The first pointer 3 is also used to drive the second pointer 5 to rotate.

[0031] In this embodiment, the first pointer 3 is the above-mentioned pressure pointer, and the second pointer 5 is a memory pointer. The first pointer 3 is located on the side of the second pointer 5 away from the cover plate 2. The damping grease 6 can provide a certain amount of damping. The second pointer 5 is pushed by the first pointer 3 to overcome the viscosity of the damping grease 6. After the second pointer 5 is pushed to any angle and the first pointer 3 is separated from the second pointer 5, the second pointer 5 is kept in this position by the viscosity of the damping grease 6. At the same time, due to the viscosity of the damping grease 6, the second pointer 5 can be driven to rotate and reset by rotating the shaft 40. The presence of the damping grease 6 can improve the lubrication between the second pointer 5 and the shaft 40, ensuring that the relative rotation of the first pointer 3 and the shaft 40 is smoother, solving the problem of pointer jamming and hysteresis, making the first pointer 3 more accurate when measuring pressure again, and reducing measurement errors.

[0032] In some embodiments, reference Figures 1 to 3 The rotating assembly 4 further includes a sleeve 41 disposed on the cover plate 2. The rotating shaft 40 includes a knob 43 rotatably connected to the sleeve 41, and a connector 45 disposed at the end of the knob 43. The connector 45 is rotatably connected to the second pointer 5. In this embodiment, the rotating shaft 40 is provided in two sections to facilitate the installation of the second pointer 5. Specifically, one end of the knob 43 can be passed through the cover plate 2, and the knob 43 can be rotatably connected to the cover plate 2. The second pointer 5 can be mounted on the end of the knob 43 that extends into the housing 1. The connector 45 is inserted into the hole of the second pointer 5 so that it is rotatably mounted on the knob 43.

[0033] In some embodiments, reference Figures 1 to 3 The sleeve 41 has a first step at one end. The rotating assembly 4 also includes a nut 42 at the other end of the sleeve 41. The cover plate 2 is positioned between the first step and the nut 42. The first step limits the axial movement of the sleeve 41. The nut 42 is screwed onto the end of the sleeve 41 that extends into the housing 1, securing the sleeve 41 to the cover plate 2. The nut 42 secures the sleeve 41 to the cover plate 2, facilitating assembly and disassembly.

[0034] In some embodiments, reference Figures 1 to 3The knob 43 has a second step at one end and a retaining spring 46 at the other end. The sleeve 41 is positioned between the second step and the retaining spring 46. The second step limits axial movement of the knob 43, while the retaining spring 46 pulls the knob 43 away from the second step, preventing it from detaching from the sleeve 41. This also facilitates assembly and disassembly of the knob 43.

[0035] In some embodiments, reference Figures 1 to 3 One end of the connecting member 45 is provided with a third step, and the other end is connected to the knob 43, and the second pointer 5 is located between the third step and the knob 43. The third step can prevent the second pointer 5 from being separated from the connecting member 45, and the end of the connecting member 45 away from the third step can be snap-fitted or threadedly connected to the knob 43.

[0036] In some embodiments, reference Figures 1 to 3 The knob 43 is provided with a mounting hole for mounting the connector 45. A countersunk hole is further provided at the end of the mounting hole. A gap is formed between the connector 45 and the countersunk hole for accommodating the damping grease 6. The damping grease 6 can be stored in the gap to prevent it from entering other areas of the housing 1.

[0037] In some embodiments, reference Figures 1 to 3 The memory pressure gauge further includes a first sealing ring 47 disposed between the first step and the cover plate 2; and a second sealing ring 48 disposed within the shaft sleeve 41 and sleeved around the outer circumference of the knob 43. The first sealing ring 47 seals the shaft sleeve 41 and the cover plate 2. The second sealing ring 48 seals the shaft sleeve 41 and the rotating shaft 40.

[0038] In some embodiments, reference Figures 1 to 3 The memory pressure gauge further includes a dial 7 disposed in the housing 1, the first pointer 3 is disposed between the dial 7 and the cover 2, and the memory pressure gauge further includes a stopper 8 disposed on the dial 7, the stopper 8 being configured to limit the first pointer 3 from rotating in a first direction. The position of the stopper 8 may be a zero point for the first pointer 3. The first direction is a direction of decreasing pressure.

[0039] In some embodiments, reference Figures 1 to 3 The cover plate 2 is sealedly connected to the housing 1, and a filling liquid is provided in the housing 1. The filling liquid may be silicone oil, glycerin, or the like, and the damping grease may be a lipid with a certain viscosity. The filling liquid and the damping grease 6 are incompatible and non-reactive with each other. The filling liquid can make the transmission in the measuring assembly more precise and smooth, and the rotation of the first pointer 3 more smooth, and can also provide a certain shock-absorbing and buffering effect.

[0040] This application also proposes a pressure device, referring to Figures 1 to 3 The pressure device includes the aforementioned memory pressure gauge. The aforementioned pressure device can be a pressure vessel or a pressure pipeline, such as a gas pipeline or a liquid pipeline. The memory pressure gauge is connected to the pipeline and can be used to test the pressure inside the pipeline.

[0041] In the embodiment of the present application, the specific working principle of the memory pressure gauge is:

[0042] The memory pressure gauge in the present application includes a housing 1, a cover plate 2, a measuring assembly, a rotating assembly 4, a second pointer 5, and damping grease 6. One end of the housing 1 is open; the cover plate 2 is arranged at the opening of the housing 1; the measuring assembly includes a first pointer 3 rotatably arranged in the housing 1; the rotating assembly 4 includes a rotating shaft 40 rotatably connected to the cover plate 2; the second pointer 5 is located in the housing 1 and is arranged at one end of the rotating shaft 40 located in the housing 1, and the second pointer 5 is rotatably connected to the rotating shaft 40; the damping grease 6 is arranged at the connection between the second pointer 5 and the rotating shaft 40; the first pointer 3 is also used to push the second pointer 5 to rotate. The damping grease 6 can provide a certain amount of damping. When the second pointer 5 is pushed to any angle, it is kept in this position due to the viscosity of the damping grease 6. At the same time, it can also improve the lubrication and will not affect the rotation of the first pointer 3.

[0043] The above are only partial or preferred embodiments of the present application. Neither the text nor the drawings can limit the scope of protection of the present application. All equivalent structural transformations made using the contents of the present application specification and drawings under the overall concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.

Claims

1. A memory pressure gauge, characterized in that: include: A shell having an opening at one end; a cover plate, arranged at the opening of the shell; A measuring assembly, comprising a first pointer rotatably disposed in the housing; A rotating assembly, comprising a rotating shaft rotatably connected to the cover plate; a second pointer, located in the housing and disposed at one end of the rotating shaft located in the housing, the second pointer being rotatably connected to the rotating shaft; Damping grease, provided at the connection between the second pointer and the rotating shaft; The first pointer is further used to push the second pointer to rotate.

2. The memory pressure gauge according to claim 1, characterized in that: The rotating assembly further includes a shaft sleeve provided on the cover plate, the rotating shaft includes a knob rotatably connected to the shaft sleeve, and a connecting piece provided at an end of the knob, and the connecting piece is rotatably connected to the second pointer.

3. The memory pressure gauge according to claim 2, characterized in that: One end of the shaft sleeve is provided with a first step, the rotating assembly further comprises a nut provided at the other end of the shaft sleeve, and the cover plate is provided between the first step and the nut.

4. The memory pressure gauge according to claim 3, characterized in that: One end of the knob is provided with a second step, and the other end is provided with a clamping spring, and the shaft sleeve is arranged between the second step and the clamping spring.

5. The memory pressure gauge according to claim 4, characterized in that: One end of the connecting member is provided with a third step, and the other end is connected to the knob, and the second pointer is located between the third step and the knob.

6. The memory pressure gauge according to claim 5, characterized in that: The knob is provided with a mounting hole for mounting the connecting member, and a countersunk hole is further provided at the end of the mounting hole. A gap for accommodating the damping grease is formed between the connecting member and the countersunk hole.

7. The memory pressure gauge according to claim 3, characterized in that: The memory pressure gauge further includes a first sealing ring disposed between the first step and the cover plate; the memory pressure gauge further includes a second sealing ring disposed in the shaft sleeve and sleeved on the outer periphery of the knob.

8. The memory pressure gauge according to claim 1, characterized in that: The memory pressure gauge further includes a dial disposed in the housing, the first pointer is disposed between the dial and the cover plate, and the memory pressure gauge further includes a stopper disposed on the dial, the stopper being used to limit the first pointer from rotating in a first direction.

9. The memory pressure gauge according to claim 1, characterized in that: The cover plate is sealed to the shell, and a filling liquid is provided in the shell.

10. A pressure device, characterized in that: The invention comprises the memory pressure gauge according to any one of claims 1 to 9.

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