Testing equipment for pressure gauge movement

Abstract

The invention discloses testing equipment for a pressure gauge movement, and relates to the technical field of movement testing, and the movement comprises a movement seat, a sector gear, a connecting rod, a rotating shaft and a hairspring. The test equipment comprises a test tube, one end of which is supplied with liquid by a pump body and the other end of which is provided with a valve body; the measuring instrument is used for measuring the hydraulic pressure in the test pipe; the detection assembly comprises a shell in which a positioning seat is fixed; the locking assembly is arranged on one side of the positioning seat and used for pressing the movement towards the positioning seat; one end of the bourdon tube is fixedly connected with the positioning seat, and the other end of the bourdon tube is connected with the connecting rod; the angle sensor is provided with an angle measuring end, and the angle measuring end is connected with the rotating shaft; wherein the positioning seat is internally provided with a flow channel, one end of the flow channel is communicated with the bourdon tube, the other end of the flow channel is communicated with a pipe fitting, the pipe fitting is communicated to the testing tube, the overall testing accuracy is high, and the automation degree is high.

Description

Technical Field

[0001] The invention relates to the technical field of movement testing, in particular to a testing device for a pressure gauge movement. Background Art

[0002] In industrial production, pressure gauges are key measuring devices and are widely used in various fluid pressure detection and control systems. Their accuracy and reliability are directly related to the safety and efficiency of the production process. However, with the continuous advancement of industrial technology and the increasing complexity of application scenarios, the performance requirements for pressure gauge movements are also getting higher and higher. Traditional pressure gauge movement testing equipment has gradually revealed some shortcomings in response to these high requirements, and technical improvements and innovations are urgently needed.

[0003] On the one hand, when testing the pressure gauge movement, traditional testing equipment often needs to install the movement on a test bench, and then install a pointer on the movement to display the pressure value by the direction of the pointer. This method requires manual reading, which may cause certain errors. This makes it difficult to detect and correct minor defects that may exist in the movement during the manufacturing process, which in turn affects the overall performance of the pressure gauge.

[0004] On the other hand, in the process of installing the movement on the test bench, the degree of automation is low, and the entire process often relies entirely on manual work, which increases testing time and cost.

[0005] Furthermore, traditional testing equipment often fails to provide sufficient fixing force or stability, causing the movement to move or loosen during the test, affecting the reliability of the test results.

[0006] Therefore, it is necessary to develop a testing device for the pressure gauge movement to solve the above problems. Summary of the invention

[0007] In order to solve the above problems, the present invention provides the following technical solutions: a test device for a pressure gauge movement, used for testing the movement, the movement comprising a core seat, a sector gear, a connecting rod, a rotating shaft, and a hairspring; the test device comprises:

[0008] A test tube, one end of which is supplied with liquid by a pump body and the other end of which is provided with a valve body;

[0009] A measuring instrument having a measuring end, the measuring end being embedded in the test tube and used for measuring the hydraulic pressure in the test tube;

[0010] A detection component comprising:

[0011] A housing in which a positioning seat is fixed;

[0012] A locking assembly, which is disposed on one side of the positioning seat and is used to press the movement toward the positioning seat;

[0013] A Bourdon tube, one end of which is fixedly connected to the positioning seat and the other end of which is used to connect to the connecting rod;

[0014] An angle sensor having an angle measuring end connected to the rotating shaft;

[0015] The positioning seat has a flow channel, one end of the flow channel is connected to the Bourdon tube, and the other end is connected to a pipe fitting, and the pipe fitting is connected to the test tube.

[0016] Further, as a preference, a connector is installed at one end of the Bourdon tube for connecting the connecting rod, and the connector comprises: a ferrule sleeved on the Bourdon tube and a clamping ring connected to the ferrule, wherein the clamping ring is perpendicular to the ferrule and parallel to the positioning seat;

[0017] The outer shell is also rotatably connected to a top cover, and a side surface of the top cover close to the outer shell is an inner surface, a magnetic rod is fixed to the inner surface, and a clamping column is pre-magnetically attracted on the magnetic rod, and the clamping column can clamp the clamping ring with the clamping hole of the connecting rod.

[0018] Further, as a preference, a first micro-motion telescopic rod is also fixed to the inner surface of the top cover, the first micro-motion telescopic rod has a first telescopic end, the first telescopic end is connected to a shifting rod, and the shifting rod is used to shift the connecting rod.

[0019] Further, as a preference, a strain gauge is also embedded in the ferrule, and the ferrule is also used to limit the counterclockwise rotation of the connecting rod;

[0020] When the movement is placed in the housing, the connecting rod is moved so as to be located on the right side of the Bourdon tube and contact the housing.

[0021] Further, as a preference, a pressure rod is fixed to the inner surface of the top cover, and an elastic member is fixed to one end of the pressure rod away from the top cover for pressing the sector gear.

[0022] Further, as a preference, the clamping column comprises: an outer column, and an inner column limitedly slidably disposed in the outer column, the inner column is made of a magnetic material, and the outer column is made of a non-magnetic material.

[0023] Further, as a preference, the locking assembly comprises:

[0024] A base, which is fixed to one side of the positioning seat;

[0025] A claw, wherein the middle part of the claw is rotatably arranged on the base, and one end of the claw away from the positioning seat is rotatably connected to a hinge seat;

[0026] A second micro-motion telescopic rod is fixed in the housing, and the second micro-motion telescopic rod has a second telescopic end for being hinged to the hinge seat.

[0027] Further, preferably, the upper surface of the positioning seat has a positioning rod corresponding to the core seat.

[0028] Compared with the prior art, the present invention provides a testing device for a pressure gauge movement, which has the following beneficial effects:

[0029] In the present invention, the rotation angle of the rotating shaft is sensed by an angle sensor, thereby obtaining the hydraulic pressure value, without the need for manual reading, and the reliability is high and the accuracy is relatively high;

[0030] The present invention adds a design of a magnetic suction rod and a clamping column on the top cover, which realizes quick connection and disassembly, improves the convenience and efficiency of testing, and in addition, through the automatic control lever, realizes precise control and positioning of the connecting rod, reduces the error caused by manual operation.

[0031] In the present invention, pressure is applied to the sector gear through the pressure rod and the elastic member, so that actual working conditions are simulated and the comprehensiveness and authenticity of the test are improved.

[0032] The present invention can preliminarily position the movement through the positioning rod, and can further lock the movement on the positioning seat through the locking component, so the overall stability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the main structure of a testing device for a pressure gauge movement;

[0034] Figure 2 A schematic diagram of the three-dimensional structure of the detection components and the movement in a test device for a pressure gauge movement Figure 1 ;

[0035] Figure 3 It is a schematic diagram of the main structure of a detection component in a test device for a pressure gauge movement;

[0036] Figure 4 A schematic diagram of the main structure of the detection component and the movement in a test device for a pressure gauge movement Figure 1 ;

[0037] Figure 5 A schematic diagram of the main structure of the detection component and the movement in a test device for a pressure gauge movement Figure 2 ;

[0038] Figure 6 A schematic diagram of the three-dimensional structure of the detection components and the movement in a test device for a pressure gauge movement Figure 2 ;

[0039] Figure 7 A schematic diagram of the three-dimensional structure of the detection components and the movement in a test device for a pressure gauge movement Figure 3 ;

[0040] Figure 8 A schematic diagram of the three-dimensional structure of the detection components and the movement in a test device for a pressure gauge movement Figure 4 ;

[0041] Fig. 9 It is a three-dimensional structural schematic diagram of a top cover in a testing device for a pressure gauge movement;

[0042] Fig.10 It is a schematic diagram of the main structure of a clamping column in a test device for a pressure gauge movement;

[0043] In the figure: 1. test tube; 2. measuring instrument; 3. detection component; 4. movement; 5. clamping column; 31. housing; 32. positioning seat; 33. pipe fitting; 34. Bourdon tube; 35. angle sensor; 36. top cover; 37. locking component; 321. positioning rod; 341. connector; 3411. ferrule; 3412. clamping ring; 342. strain gauge; 361. first micro-motion telescopic rod; 362. lever; 363. pressure rod; 364. magnetic rod; 371. base; 372. claw; 373. hinge seat; 374. second micro-motion telescopic rod; 41. core seat; 42. sector gear; 43. connecting rod; 44. rotating shaft; 45. hairspring; 51. outer column; 52. inner column. DETAILED DESCRIPTION

[0044] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned description of the drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0045] Example: Please refer to Figure 1-Figure 10 ,in, Figure 4 and Figure 5 This is a schematic diagram of the different states of the detection components and the movement, that is, Figure 4 This is a schematic diagram of the test component before it is connected to the movement. Figure 5 This is a schematic diagram of the connection between the detection component and the movement;

[0046] and Figure 2 , Figure 6 , Figure 7 and Figure 8 It is a three-dimensional structural diagram of the detection component and the movement from different viewing angles, so as to better show the structure; among them, Figure 6 and Figure 7 The top cover 36 is not shown; Figure 8 It is a cross-sectional schematic diagram.

[0047] In the embodiment of the present invention, a testing device for a pressure gauge movement is provided, which is used to test a movement 4, wherein the movement 4 includes a core seat 41, a sector gear 42, a connecting rod 43, a rotating shaft 44, and a hairspring 45. Of course, the movement 4 also includes some rivets, gears that cooperate with the sector gear 42, and other structures, which will not be described in detail here.

[0048] The test equipment includes:

[0049] A test tube 1, one end of which is supplied with liquid by a pump body, which helps to simulate the hydraulic environment in actual work, and the other end is provided with a valve body, which is used to control the flow of liquid and the release of pressure;

[0050] A measuring instrument 2, which has a measuring end, the measuring end is embedded in the test tube 1, and is used to measure the hydraulic pressure in the test tube 1;

[0051] The detection component 3 comprises:

[0052] The housing 31 has a positioning seat 32 fixed therein;

[0053] A locking assembly 37, which is disposed on one side of the positioning seat 32 and is used to press the movement 4 toward the positioning seat 32;

[0054] A Bourdon tube 34, one end of which is fixedly connected to the positioning seat 32, and the other end of which is used to connect to the connecting rod 43;

[0055] An angle sensor 35, which has an angle measuring end, and the angle measuring end is connected to the rotating shaft 44;

[0056] The positioning seat 32 has a flow channel, one end of the flow channel is connected to the Bourdon tube 34 , and the other end is connected to a pipe fitting 33 , and the pipe fitting 33 is connected to the test tube 1 .

[0057] The measuring instrument 2 is used to accurately measure the first hydraulic pressure value in the test tube 1 so as to serve as a reference standard, and the measuring instrument 2 can feed back the hydraulic pressure data in real time.

[0058] The locking assembly 37 is used to stably press the movement 4 on the positioning seat 32 to ensure that the movement 4 will not move or loosen during the test. More specifically, the locking assembly 37 includes:

[0059] A base 371, which is fixed to one side of the positioning base 32;

[0060] A claw 372, wherein the middle part is rotatably disposed on the base 371, and one end of the claw 372 away from the positioning seat 32 is rotatably connected to a hinge seat 373;

[0061] The second fine-motion telescopic rod 374 is fixed in the housing 31 . The second fine-motion telescopic rod 374 has a second telescopic end for being hinged to the hinge seat 373 .

[0062] The angle sensor 35 is used to measure the rotation angle of the rotating shaft 44, thereby obtaining the second hydraulic value, without the need for manual reading, and is highly reliable and accurate.

[0063] The workflow is as follows:

[0064] Install the movement 4 into the detection assembly 3, ensure that the Bourdon tube 34 is correctly connected to the connecting rod 43, and the rotating shaft 44 is connected to the angle sensor 35;

[0065] Start the pump body and adjust the valve body to adjust the hydraulic environment in the test pipe 1;

[0066] The measuring instrument 2 measures the first hydraulic pressure value in the test tube 1 in real time, thereby serving as a reference standard;

[0067] The Bourdon tube 34 is deformed under the influence of hydraulic pressure, and then the shaft 44 is rotated through the transmission in the movement 4, and the angle sensor 35 measures the rotation angle of the shaft 44, thereby obtaining a second hydraulic pressure value;

[0068] Analyze the working performance of the movement 4 according to the first hydraulic pressure value and the second hydraulic pressure value, including pressure response speed, accuracy, stability, etc.;

[0069] After the test is finished, the pump body is closed and the valve body is opened to release the pressure in the test tube 1, and the movement 4 is removed for the next step of processing or testing.

[0070] In this embodiment, a connector 341 is installed at one end of the Bourdon tube 34 for connecting the connecting rod 43, and the connector 341 includes: a ferrule 3411 sleeved on the Bourdon tube 34 and a clamping ring 3412 connected to the ferrule 3411, wherein the clamping ring 3412 is perpendicular to the ferrule 3411 and parallel to the positioning seat 32;

[0071] The outer shell 31 is also rotatably connected to a top cover 36, and the side surface of the top cover 36 close to the outer shell 31 is an inner surface, and a magnetic rod 364 is fixed to the inner surface. The magnetic rod 364 is pre-magnetically attracted with a clamping column 5, and the clamping column 5 can clamp the clamping ring 3412 with the clamping hole of the connecting rod 43.

[0072] The clamping ring 3412 has a receiving groove for receiving the clamping column 5 .

[0073] The top cover 36 can be rotated on the housing 31 , so that the user can easily access and operate the internal components of the housing 31 without moving the entire testing device.

[0074] Among them, the magnetic attraction rod 364 is an electrically driven magnetic attraction rod, through which the card column 5 can be adsorbed and released. When the card column 5 is released, the card column 5 can engage the retaining ring 3412 with the retaining hole of the connecting rod 43 to achieve quick connection. When the card column 5 is adsorbed, the card column 5 can be detached from the retaining ring 3412 and the retaining hole of the connecting rod 43, thereby achieving quick disassembly.

[0075] In addition, the magnetic connection reduces the errors that may be caused by human operation and improves the accuracy of the test.

[0076] In this embodiment, a first micro-motion telescopic rod 361 is further fixed to the inner surface of the top cover 36 . The first micro-motion telescopic rod 361 has a first telescopic end. The first telescopic end is connected to a lever 362 . The lever 362 is used to move the connecting rod 43 .

[0077] The first micro-motion telescopic rod 361 can drive the lever 362 to move, and the lever 362 directly acts on the connecting rod 43 to move or position the connecting rod 43 to a specific test position, thereby facilitating subsequent test steps.

[0078] In this embodiment, a strain gauge 342 is also embedded in the clamping sleeve 3411, and the clamping sleeve 3411 is also used to limit the counterclockwise rotation of the connecting rod 43;

[0079] When the movement 4 is placed in the housing 31 , the connecting rod 43 is moved to be located on the right side of the Bourdon tube 34 and in contact with the housing 31 .

[0080] Among them, the strain gauge 342 can be used to measure whether the connecting rod 43 reaches the specified position;

[0081] Furthermore, in addition to fixing the Bourdon tube 34 , the sleeve 3411 also limits the counterclockwise rotation of the connecting rod 43 .

[0082] This restriction ensures that the connecting rod 43 can reach the specified position during the movement, that is, when the clamping hole on the connecting rod 43 is coaxial with the clamping ring 3412, the connecting rod 43 cannot continue to move counterclockwise. At this time, the strain gauge 342 can also feedback the pressure data in time, and the first micro-telescopic rod 361 stops further contraction after receiving the pressure data.

[0083] That is to say, in this embodiment, by providing the first micro-motion telescopic rod 361 and the shifting rod 362, precise control and positioning of the connecting rod 43 are achieved; by embedding the strain gauge 342, an additional pressure monitoring means is provided.

[0084] In addition, the first micro-motion telescopic rod 361 is provided so that certain steps in the test process can be automated, thereby reducing manual intervention and human errors.

[0085] In this embodiment, a pressing rod 363 is fixed to the inner surface of the top cover 36 , and an elastic member is fixed to one end of the pressing rod 363 away from the top cover 36 for pressing the sector gear 42 .

[0086] The pressure rod 363 is fixed on the inner surface of the top cover 36 to ensure that the top cover 36 can be accurately aligned with the sector gear 42 in the movement 4 when the top cover 36 is closed, thereby improving the automation and efficiency of the test.

[0087] Furthermore, a certain pressure is applied to the sector gear 42 through the elastic member connected to the end of the pressure rod 363. This pressure can simulate the external pressure or load that the movement may be subjected to in actual operation, so as to more comprehensively test the performance of the movement, for example, simulating the state of the movement 4 being in liquid (the movement of some pressure gauges is always immersed in liquid to maintain stability).

[0088] The elastic member may be a spring, an elastic rubber pad or other elastic materials.

[0089] The elastic member provides a stable pressure output for the pressure rod 363, while allowing a certain elastic deformation to adapt to the requirements of different movements or different test conditions.

[0090] Furthermore, by adjusting the stiffness and preload of the elastic member (eg, by replacing the elastic member), the pressure applied to the sector gear 42 can be precisely controlled, thereby more accurately simulating actual working conditions.

[0091] In this embodiment, the clamping column 5 includes: an outer column 51, and an inner column 52 which is limitedly slidably set in the outer column 51. The inner column 52 is made of magnetic material, such as metals such as iron and nickel, or magnetic alloy materials, to ensure that sufficient suction force can be generated under the action of an external magnetic field to make the inner column 52 extend out of the outer column. The outer column 51 is made of non-magnetic material, such as stainless steel, aluminum alloy, etc.

[0092] It should be explained that the inner column 52 is a piston rod structure as a whole, and the opening of the outer column 51 has a shoulder, so that the inner column 52 can be slidably disposed in the outer column 51 in a limited position;

[0093] Such an arrangement allows, when the magnetic rod 364 magnetically attracts the inner column 52, part of the inner column 52 extends out of the outer column 51, and part of the inner column 52 is confined in the outer column 51. The overall structure of the clamping column 5 is equivalent to being extended. At this time, the outer column 51 can be closer to the clamping hole of the clamping ring 3412 and the connecting rod 43. When the magnetic rod 364 releases the inner column 52, it can ensure that the outer column 51 can smoothly enter the clamping hole of the clamping ring 3412 and the connecting rod 43. After the inner column 52 falls, it can slightly impact the outer column 51, ensuring that the outer column 51 can completely enter the clamping hole of the clamping ring 3412 and the connecting rod 43, thereby achieving a stable engagement.

[0094] In this embodiment, the upper surface of the positioning seat 32 has a positioning rod 321 corresponding to the core seat 41. During implementation, the movement 4 can be initially positioned through the positioning rod 321, and then the movement 4 can be further locked on the positioning seat 32 through the locking assembly 37, and the overall stability is high.

[0095] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A testing device for a pressure gauge movement, used for testing a movement (4), wherein the movement (4) comprises a core seat (41), a sector gear (42), a connecting rod (43), a rotating shaft (44), and a hairspring (45); characterized in that: The test equipment includes: A test tube (1), one end of which is supplied with liquid by a pump body and the other end of which is provided with a valve body; A measuring instrument (2), comprising a measuring end, the measuring end being embedded in the test tube (1) and being used to measure the hydraulic pressure in the test tube (1); The detection component (3) comprises: A housing (31) having a positioning seat (32) fixed therein; A locking assembly (37), which is arranged on one side of the positioning seat (32) and is used to press the movement (4) toward the positioning seat (32); A Bourdon tube (34), one end of which is fixedly connected to the positioning seat (32) and the other end of which is used to connect to the connecting rod (43); An angle sensor (35) having an angle measuring end, the angle measuring end being connected to the rotating shaft (44); The positioning seat (32) has a flow channel, one end of the flow channel is connected to the Bourdon tube (34), and the other end is connected to a pipe fitting (33), and the pipe fitting (33) is connected to the test tube (1).

2. A test device for a pressure gauge movement according to claim 1, characterized in that: The Bourdon tube (34) is provided with a connector (341) at one end thereof for connecting to the connecting rod (43), wherein the connector (341) comprises: a ferrule (3411) sleeved on the Bourdon tube (34) and a clamping ring (3412) connected to the ferrule (3411), wherein the clamping ring (3412) is perpendicular to the ferrule (3411) and parallel to the positioning seat (32); The outer shell (31) is also rotatably connected to a top cover (36); a side surface of the top cover (36) close to the outer shell (31) is an inner surface; a magnetic attraction rod (364) is fixed to the inner surface; a clamping column (5) is pre-magnetically attracted to the magnetic attraction rod (364); the clamping column (5) is capable of clamping the clamping ring (3412) with the clamping hole of the connecting rod (43).

3. A test device for a pressure gauge movement according to claim 2, characterized in that: A first micro-motion telescopic rod (361) is also fixed to the inner surface of the top cover (36), the first micro-motion telescopic rod (361) having a first telescopic end, the first telescopic end being connected to a lever (362), the lever (362) being used to move the connecting rod (43).

4. A test device for a pressure gauge movement according to claim 3, characterized in that: A strain gauge (342) is also embedded in the clamping sleeve (3411), and the clamping sleeve (3411) is also used to limit the counterclockwise rotation of the connecting rod (43); When the movement (4) is placed in the housing (31), the connecting rod (43) is moved so that it is located on the right side of the Bourdon tube (34) and contacts the housing (31).

5. A test device for a pressure gauge movement according to claim 2, characterized in that: A pressure rod (363) is also fixed to the inner surface of the top cover (36), and an elastic member is fixed to one end of the pressure rod (363) away from the top cover (36) for pressing the sector gear (42).

6. A test device for a pressure gauge movement according to claim 2, characterized in that: The clamping column (5) comprises an outer column (51) and an inner column (52) which is limitedly slidably arranged in the outer column (51); the inner column (52) is made of a magnetic material, and the outer column (51) is made of a non-magnetic material.

7. A test device for a pressure gauge movement according to claim 1, characterized in that: The locking assembly (37) comprises: A base (371) fixed to one side of the positioning seat (32); A clamping claw (372), wherein the middle portion is rotatably disposed on the base (371), and one end of the clamping claw (372) away from the positioning seat (32) is rotatably connected to a hinge seat (373); A second micro-motion telescopic rod (374) is fixed in the housing (31); the second micro-motion telescopic rod (374) has a second telescopic end for being hinged to the hinge seat (373).

8. A test device for a pressure gauge movement according to claim 1, characterized in that: The upper surface of the positioning seat (32) has a positioning rod (321) corresponding to the core seat (41).

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