CN212432416U

CN212432416U - Batch testing device for pressure sensors

Info

Publication number: CN212432416U
Application number: CN202021655509.7U
Authority: CN
Inventors: 单建利; 陈军
Original assignee: Shenzhen Readsensor Technology Co ltd
Current assignee: Shenzhen Readsensor Technology Co ltd
Priority date: 2020-08-10
Filing date: 2020-08-10
Publication date: 2021-01-29
Anticipated expiration: 2030-08-10

Abstract

The embodiment of the utility model discloses a batch test device of pressure sensor, the device includes clamp plate, base, and the base epirelief is equipped with a plurality of adapters, and the diameter of adapter matches with pressure sensor's hole, has seted up the seal ring groove on the adapter, and the cover is equipped with the sealing washer on the seal ring groove, is equipped with the breather pipe that communicates with the outside in the adapter; the base is provided with a pipeline interface, a pipeline is arranged in the base, and the vent pipe is communicated with the pipeline interface through the pipeline; the pressure plate is provided with a plurality of positioning grooves matched with the pressure sensors, and the positions of the positioning grooves are respectively in one-to-one correspondence with the joints. The utility model has the advantages that the space of the wrench is not required to be reserved, the products are arranged compactly, and each product is assembled only by plugging, so that the efficiency is improved; the utility model discloses use the hole lateral wall to do floated sealed, do not have assembly stress, do not need control screw thread screwing force, the data of test are more accurate.

Description

Batch testing device for pressure sensors

Technical Field

The utility model relates to a pressure sensor technical field especially relates to a pressure sensor's batch testing arrangement.

Background

Most industrial pressure sensors have a threaded interface at the front end, and during production or use, the pressure sensor is connected with a pressure pipe or equipment to be measured through the threaded interface and a proper sealing ring. Due to different applications and inconsistent thread specifications of different countries, more than 20 or even more thread interfaces are commonly used. This results in the sensor factory needing to change the threaded interface of the test fixture frequently to accommodate different model orders when performing batch tests. Even if the problem of replacing the threaded interface is not considered, each sensor is connected with the test tool through a method of screwing threads, and the whole dismounting process is time-consuming.

Taking a set of tools to measure 14 sensors as an example, as shown in fig. 1, a conventional tool (1) is: the head of the pressure channel is blocked by the plug (2), the sensor (3) needs to be screwed one by one into a female thread port on the tool (1), and the pressure channel is connected in a sealing mode through the extrusion sealing ring (4). When all 14 sensors are screwed, an external gas or liquid pressure source applies a specified pressure to the sensor (3) through the pipe interface (5) by the controller. To enable testing and calibration of 14 sensors at standard pressure. If the screw thread interface of a certain type of sensor is not matched with the screw thread interface of the tool (1), as shown in figure 2, 14 corresponding screw joints (6) are needed for switching.

The disadvantages of this test method are:

1. the sensors need to be screwed and unscrewed one by means of a torque wrench for disassembly and assembly, which is time-consuming;

2. various adapters need to be prepared for the threads of different models, the manufacturing and management cost of the adapters is high, and time is consumed for assembling and disassembling the adapters each time;

3. the screwing torque of the thread of each sensor needs to be strictly controlled, clamping stress is caused by over-tightening, the output of the sensor is influenced, the compression amount of a sealing ring is insufficient when the sensor is over-tightened, and leakage is easy to occur in the testing process;

4. enough space, namely wrench space, is to be left between every sensor, otherwise unable loading and unloading smoothly, and this just leads to the size of frock great, and especially when carrying out pressure test in high low-temperature chamber, the frock size that the furnace chamber can hold is limited, leads to measuring many products simultaneously, and the energy consumption is great, and efficiency is not high.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve lies in, provides a pressure sensor's batch testing arrangement to make and reduce the frock cost, promote efficiency of software testing.

In order to solve the technical problem, an embodiment of the utility model provides a batch test device of pressure sensors, which comprises a pressing plate and a base, wherein a plurality of joints are convexly arranged on the base, the diameter of each joint is matched with the inner hole of each pressure sensor, a sealing ring groove is arranged on each joint, a sealing ring is sleeved on each sealing ring groove, and a vent pipe communicated with the outside is arranged in each joint; the base is provided with a pipeline interface, a pipeline is arranged in the base, and the vent pipe is communicated with the pipeline interface through the pipeline; the pressure plate is provided with a plurality of positioning grooves matched with the pressure sensors, and the positions of the positioning grooves are respectively in one-to-one correspondence with the joints.

Further, the adaptor is cylindrical.

Further, the clamp further comprises a bolt, a through hole matched with the bolt is formed in the pressing plate, and a screw hole corresponding to the through hole is formed in the base.

Further, the pipeline connector also comprises a plug for plugging the pipeline connector.

The utility model has the advantages that:

1. the utility model does not need to reserve wrench space, the products are arranged compactly, for example, the original 14 products are changed into 20 products by the same size of the tool, and the testing efficiency and the equipment utilization rate are improved by 42 percent;

2. compared with the assembly method that each pressure sensor product to be tested needs to be screwed and loosened by threads, the utility model discloses only need to cover the clamp plate and screw the bolt, and each product assembly only needs the plug, saves time, lightens staff working strength (because "pressure = pressure X stress area", the utility model discloses a sealed face changes into the hole by original terminal surface, under the same big fluid pressure condition of test, because the sectional area of sealed face reduces greatly, makes the atress of each sensor reduce, so the whole frock is not big to the force of clamp plate at the during operation, through safe calculation, only needs several bolted connections, just is enough to guarantee safe test.);

3. because the inner hole of each thread is unified at the beginning of design, the same tool can be used for testing through the inner hole sealing no matter which thread is used, and a threaded adapter is not required to be manufactured to adapt to orders of different models; this greatly saves the cost of manufacture and management, and also greatly reduces the operation time;

4. compare current test scheme, the sensor is sealed through the method that the sealing washer compressed tightly the terminal surface, the utility model discloses use the hole lateral wall to do floated sealed, do not have assembly stress, do not need control screw thread screwing force, the data of test are more accurate.

Drawings

Fig. 1 is a structural view of a pressure test tool in the background art.

Figure 2 is a schematic diagram of a pressure tester assembly screw fitting of the prior art.

Fig. 3 is a structural diagram of a pressure sensor according to an embodiment of the present invention.

Fig. 4 is a structural diagram of a pressure sensor according to another embodiment of the present invention.

Fig. 5 is a structural diagram of a batch test device for pressure sensors according to an embodiment of the present invention.

Fig. 6 is a cross-sectional view of a base plate according to an embodiment of the present invention.

Fig. 7 is a cross-sectional view of an angle of a batch test setup of pressure sensors in accordance with an embodiment of the present invention.

Fig. 8 is a cross-sectional view of another angle of a batch test setup of pressure sensors in accordance with an embodiment of the present invention.

Fig. 9 is a flow chart of a batch test method for pressure sensors used in embodiments of the present invention.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict, and the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

In the embodiment of the present invention, if there is directional indication (such as upper, lower, left, right, front, and rear … …) only for explaining the relative position relationship between the components and the motion situation under a certain posture (as shown in the drawing), if the certain posture is changed, the directional indication is changed accordingly.

In addition, the descriptions of the first, second, etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Referring to fig. 3 to 8, a batch test device for pressure sensors according to an embodiment of the present invention includes a pressing plate 10 and a base 11.

A plurality of joint heads 14 are convexly arranged on the base 11, the diameters of the joint heads 14 are matched with the inner holes 7 of the pressure sensors 15, sealing ring grooves are formed in the joint heads 14, sealing rings 13 are sleeved on the sealing ring grooves, and ventilating pipes communicated with the outside are arranged in the joint heads 14. Preferably, there are two rows of 20 adaptors 14.

In one embodiment, the adaptor head 14 is cylindrical. The inner holes 7 of the pressure sensors 15 are uniform in size, and most of the existing pressure sensors are cylindrical, as shown in fig. 3. Preferably, the bottom diameter of the inner bore 7 of the pressure sensor 15 is larger than the middle diameter to facilitate insertion and sleeving onto the adaptor head 14, as shown in FIG. 4. The pressure sensor 15 of each threaded interface has an inner hole 7 for introducing fluid, the size of the inner hole 7 is irrelevant to the application of a client, if the sensor inner holes 7 of each type are machined according to a uniform size during product design, the inner holes 7 with the uniform size can be used as sealing surfaces during subsequent tool design, namely, the sealing rings 13 are used for side sealing.

The base 11 is provided with a pipeline interface 17, a pipeline is arranged in the base 11, and the vent pipe is communicated with the pipeline interface 17 through the pipeline. The pressure plate 10 is provided with a plurality of positioning grooves 18 matched with the pressure sensors 15, and the positions of the positioning grooves 18 are respectively corresponding to the joints 14 one by one. Preferably, the pressure plate 10 is made of a stainless steel material. The positioning groove 18 is used to fix the pressure sensor 15 and prevent the pressure sensor 15 from being displaced.

In one embodiment, the batch test device for the pressure sensors further includes a bolt 16, a through hole 19 matching with the bolt 16 is formed on the pressure plate 10, and a screw hole 20 corresponding to the through hole 19 is formed on the base 11. The bolt 16 is screwed with the screw hole 20 through the through hole 19 to screw the pressing plate 10 to the base 11.

In one embodiment, the batch test apparatus for pressure sensors further includes a plug 12 for plugging the pipe interface 17.

The utility model discloses a theory of operation does: the pressure sensors 15 are inserted and sleeved on the adapter 14 of the base 11 one by one, the sealing ring 13 is extruded and deformed at the moment, the surface of the inner hole 7 of the sensor and the sealing ring groove form side sealing, after 20 sensors are installed, the upper part is covered with the pressure plate 10, the pressure plate 10 is screwed with the base 11 through the bolts 16, and the installation is finished. At this time, the pressure sensor 15 is sandwiched by the base 11 and the platen 10. The external gas or liquid pressure source applies specified pressure to the products through the pipeline interface 17 by the controller, and the simultaneous testing and calibration of 20 products are realized. After calibration is finished, the bolts 16 are unscrewed, the pressure plate 10 is taken down, and the pressure sensors 15 can be pulled out one by one.

Referring to fig. 9, a batch test method for pressure sensors according to an embodiment of the present invention includes:

step 1: inserting a plurality of pressure sensors 15 to be measured into the adaptor 14 one by one;

step 2: after the pressure sensor 15 is completely inserted into the adapter 14, the pressure plate 10 is covered, and the pressure plate 10 and the base 11 are screwed by the bolt 16, so that the pressure sensor 15 is clamped by the pressure plate 10 and the base 11;

and step 3: an external gas or liquid pressure source applies specified pressure to the pressure sensors 15 through the pipeline interfaces 17, so that the multiple pressure sensors 15 to be tested are tested and calibrated simultaneously;

and 4, step 4: after calibration is finished, the bolts 16 are unscrewed, the pressure plate 10 is taken down, and the pressure sensors 15 are pulled out one by one.

As an embodiment, step 1 further includes an inner diameter unifying step: the inner hole 7 of each type of the pressure sensor 15 is machined according to a uniform size. Preferably, the diameter of the bottom of the inner bore 7 of the pressure sensor 15 is larger than the diameter of the middle.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A batch testing device of pressure sensors is characterized by comprising a pressing plate and a base, wherein a plurality of joint heads are convexly arranged on the base, the diameters of the joint heads are matched with inner holes of the pressure sensors, sealing ring grooves are formed in the joint heads, sealing rings are sleeved on the sealing ring grooves, and ventilating pipes communicated with the outside are arranged in the joint heads; the base is provided with a pipeline interface, a pipeline is arranged in the base, and the vent pipe is communicated with the pipeline interface through the pipeline; the pressure plate is provided with a plurality of positioning grooves matched with the pressure sensors, and the positions of the positioning grooves are respectively in one-to-one correspondence with the joints.

2. The batch test fixture of pressure sensors of claim 1, wherein the adapter is cylindrical.

3. The batch test device of pressure sensors of claim 1, further comprising a bolt, wherein the pressure plate is provided with a through hole matching with the bolt, and the base is provided with a screw hole corresponding to the through hole.

4. The batch testing apparatus of pressure sensors of claim 1, further comprising a plug for plugging a pipe interface.