Sensor packaging piece and remote transmission density meter

Abstract

The invention relates to the field of gas density detection, in particular to a sensor packaging piece and a remote transmission density meter. The sensor packaging piece comprises a shell, the shell is provided with a connecting structure used for being connected with equipment to be tested in a sealed mode, a sensor is arranged in the shell, the shell is further provided with a loading opening allowing the sensor to be loaded into the shell, a plug is fixedly connected to the loading opening in a sealed mode, and a channel allowing a medium to be tested to enter the shell is arranged in the connecting structure. According to the sensor packaging piece, the sensor can be conveniently arranged in the shell through the arrangement of the loading opening, and the loading opening can be conveniently sealed through the plug arranged at the loading opening, so that the sensor packaging piece forms a closed cavity, and a medium of to-be-detected equipment can be conveniently detected; the problem that in the prior art, due to the fact that a sensor is arranged in a copper pipe in a sealed mode through an O-shaped sealing ring, the copper pipe is blocked, and gas in the copper pipe is detected, setting and model selection of the sensor are limited is solved.

Description

Technical Field

[0001] The invention relates to the field of gas density detection, and in particular to a sensor package and a remote transmission density meter. Background Art

[0002] In the electrical field, especially in the high-voltage electrical field, in order to achieve good sealing, sulfur hexafluoride gas is generally filled into electrical equipment. The density of sulfur hexafluoride is closely related to the insulation performance, so it is also necessary to ensure that the sulfur hexafluoride gas filled is high pressure. During the operation of electrical equipment, its insulation performance needs to be ensured at all times, that is, the density of sulfur hexafluoride needs to be ensured, so a density meter that can detect the density of sulfur hexafluoride needs to be preset in the electrical equipment.

[0003] In the prior art, a copper tube is welded on the meter joint. The copper tube is a copper tube with two openings. The opening at one end is welded on the meter joint, and the opening at the other end is sealed by setting a sensor. Specifically, a sensor is set inside the copper tube, and the sensor and the inner diameter of the copper tube are sealed and installed by an O-ring, or the sensor is welded at the opening of the copper tube to block the opening of the copper tube. In the above two technical solutions, the sensor must simultaneously play the role of detection and blocking to form an air chamber.

[0004] However, there are many specifications and forms of sensors in the prior art. Since the sensor plays a sealing role, the form of the sensor needs to be set to match the inner diameter of the copper tube, which limits the selection and setting of the sensor, and the seal is prone to failure. On the other hand, the copper tube and the meter joint are fixedly connected by welding, and the connection between the copper tube and the meter joint is also prone to failure. Summary of the invention

[0005] The object of the present invention is to provide a sensor package to solve the problem in the prior art that the sensor setting selection is limited because the sensor is sealed in a copper tube through an O-ring to both seal the copper tube and detect the gas in the copper tube; the object of the present invention is also to provide a remote transmission density meter to solve the above technical problems.

[0006] To achieve the above purpose, the sensor package in the present invention adopts the following technical solution:

[0007] A sensor package comprises a shell, a connection structure for sealing connection with a device to be tested is provided on the shell, a sensor is provided in the shell, and a loading port for loading the sensor into the shell is also provided on the shell, a plug is sealed and fixedly connected to the loading port, and a channel for the medium to be tested to enter the shell is provided in the connection structure.

[0008] The beneficial effects of the above technical solution are as follows: the present invention improves the existing sensor package by providing a shell, and providing a connecting structure in the shell that is sealed and connected to the device to be tested, so as to facilitate connection with the device to be tested, and a channel for the medium to be tested to enter the shell is provided in the connecting structure, so as to facilitate the introduction of the gas to be detected and facilitate detection; by providing an installation port, it is convenient to set the sensor in the shell, and by providing a plug at the installation port, it is convenient to seal the installation port, so that the sensor package forms a closed chamber, which is convenient for detecting the medium of the device to be tested, thereby solving the problem in the prior art that the sensor setting selection is limited because the sensor is sealed in the copper tube by an O-ring to seal the copper tube and detect the gas in the copper tube.

[0009] Furthermore, a conductor is connected to the sensor, and the conductor seals and passes through the plug.

[0010] The beneficial effect of the above technical solution is that it facilitates external information exchange.

[0011] Furthermore, the sensor package includes a circuit board, the sensor is mounted on the circuit board, the conductor includes a fixing portion fixed in the circuit board and a pin passing through the circuit board, the pin passes through the plug and is sealed and fixed to the plug.

[0012] The beneficial effects of the above technical solution are: the arrangement of the sensor is facilitated by the arrangement of the circuit board, and the arrangement of the pins is facilitated by the extraction of the signal.

[0013] Furthermore, the plug is provided with a through hole for the wire to pass through and an insertion hole connected to the through hole and for the end of the circuit board to extend into, and the end of the circuit board is fixed in the insertion hole.

[0014] The beneficial effect of the above technical solution is that it is easy to insert the pin, and the circuit board is fixed in the insertion hole to facilitate the protection of the circuit board.

[0015] Furthermore, the plug is fixed at the loading port by welding.

[0016] The beneficial effect of the above technical solution is that the welding fixing structure is firm.

[0017] Furthermore, the shell is provided with a stepped hole for accommodating a plug, and the plug is accommodated in the stepped hole and fixed to the hole wall of the stepped hole by welding.

[0018] The beneficial effect of the above technical solution is that the step hole can both limit the plug and accommodate the plug.

[0019] Furthermore, the connection structure is a stud, and a screwing structure is also provided on the shell.

[0020] The beneficial effect of the above technical solution is that it is easy to fix the sensor package to the device to be tested.

[0021] To achieve the above purpose, the remote transmission density meter in the present invention adopts the following technical solutions:

[0022] A remote density meter includes an electronic detection module, wherein the electronic detection module includes a sensor package, the sensor package includes a shell, the shell is provided with a connection structure for sealing connection with a device to be tested, a sensor is provided in the shell, and the shell is also provided with an inlet for the sensor to be installed in the shell, a plug is sealed and fixedly connected to the inlet, a channel for the medium to be tested to enter the shell is provided in the connection structure, the shell of the sensor package is sealed and connected to a meter joint, and the meter joint constitutes the device to be tested.

[0023] The beneficial effects of the above technical solution are as follows: the present invention improves the existing remote transmission density meter by providing a shell, and providing a connecting structure in the shell that is sealed and connected to the device to be tested, so as to facilitate connection with the device to be tested, and a channel for the medium to be tested to enter the shell is provided in the connecting structure, so as to facilitate the introduction of the gas to be tested and facilitate the detection; the installation port is provided to facilitate the installation of the sensor in the shell, and the plug is provided at the installation port to facilitate the sealing of the installation port, so that the sensor package forms a closed chamber, which is convenient for detecting the medium of the device to be tested, thereby solving the problem in the prior art that the sensor is sealed in a copper tube by an O-ring to seal the copper tube and detect the gas in the copper tube, resulting in limited sensor setting selection.

[0024] Furthermore, a conductor is connected to the sensor, and the conductor seals and passes through the plug.

[0025] The beneficial effect of the above technical solution is that it facilitates external information exchange.

[0026] Furthermore, the sensor package includes a circuit board, the sensor is mounted on the circuit board, the conductor includes a fixing portion fixed in the circuit board and a pin passing through the circuit board, the pin passes through the plug and is sealed and fixed to the plug.

[0027] The beneficial effects of the above technical solution are: the arrangement of the sensor is facilitated by the arrangement of the circuit board, and the arrangement of the pins is facilitated by the extraction of the signal.

[0028] Furthermore, the plug is provided with a through hole for the wire to pass through and an insertion hole connected to the through hole and for the end of the circuit board to extend into, and the end of the circuit board is fixed in the insertion hole.

[0029] The beneficial effect of the above technical solution is that it is easy to insert the pin, and the circuit board is fixed in the insertion hole to facilitate the protection of the circuit board.

[0030] Furthermore, the plug is fixed at the loading port by welding.

[0031] The beneficial effect of the above technical solution is that the welding fixing structure is firm.

[0032] Furthermore, the shell is provided with a stepped hole for accommodating a plug, and the plug is accommodated in the stepped hole and fixed to the hole wall of the stepped hole by welding.

[0033] The beneficial effect of the above technical solution is that the step hole can both limit the plug and accommodate the plug.

[0034] Furthermore, the connection structure is a stud, a threaded hole is provided on the gauge joint, and a seal is provided between the connection structure and the gauge joint.

[0035] The beneficial effect of the above technical solution is that it is easy to fix the sensor package to the device to be tested.

[0036] Furthermore, the remote density meter includes a mechanical part housing and an electronic part housing, the meter joint is respectively provided with a first air outlet extending into the mechanical part housing and a second air outlet extending into the electronic part housing, the sensor package is arranged in the electronic part housing and is sealed and connected to the second air outlet.

[0037] The beneficial effect of the above technical solution is that two shells are provided, thereby eliminating the copper tube, and since the two air outlets of the meter joint are respectively provided in the two shells, even if leakage occurs at the air outlet, it will not affect the mechanical part. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of Example 1 of the remote transmission density meter of the present invention;

[0039] Figure 2 It is a schematic diagram of the structure of the sensor package in Example 1 of the remote transmission density meter of the present invention;

[0040] Figure 3 It is an exploded schematic diagram of the sensor package in Example 1 of the remote transmission density meter of the present invention;

[0041] Figure 4 It is a schematic diagram of the connection structure between the conductor and the cover plate of the sensor package in Example 1 of the remote transmission density meter of the present invention;

[0042] Figure 5 It is a cross-sectional schematic diagram of the shell of the sensor package in Example 1 of the remote transmission density meter of the present invention.

[0043] In the figure: 11, mechanical part housing; 12, electronic part housing; 13, meter joint; 14, first air outlet; 15, outlet; 16, copper pad; 17, sealing ring; 18, sensor package; 21, housing; 22, plug; 23, stud; 24, circuit board; 25, pin; 26, glass; 27, sensor. DETAILED DESCRIPTION

[0044] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0045] In embodiment 1 of the remote transmission density table of the present invention:

[0046] In this embodiment, the remote transmission density meter includes a mechanical part shell and an electronic part shell, and a sensor package is also arranged in the electronic part shell, wherein the sensor package includes a shell, a loading port is arranged on the shell, a plug is sealed and fixed at the loading port, and the plug and the shell together surround and form an air chamber with an inlet. By arranging the sensor in the air chamber, it is convenient to detect the density. At this time, the sensor only plays a detection role, and the sealing is performed by the shell.

[0047] like Figure 1 As shown, the remote transmission density meter includes a mechanical part and an electronic part. Specifically, the remote transmission density meter includes a mechanical part housing 11 and an electronic part housing 12. A meter connector 13 having one end connected to an electrical device is also provided on the mechanical part housing. The meter connector 13 is respectively provided with a first air outlet 14 extending into the mechanical part housing 11 and a through-portion 15 extending into the electronic part housing 12. The sensor package 18 is arranged in the electronic part housing 12 and is sealed and connected to the through-portion 15. Specifically, a threaded hole is provided on the through-portion 15 of the meter connector 13, and a connecting structure is provided on the sensor package 18, and the connecting structure is assembled on the through-portion 15. Specifically, the connecting structure is a stud 23, and the assembly is completed by connecting the stud 23 with the threaded hole. In order to better achieve the sealing of the meter connector 13 and the sensor package, a sealing gasket is also provided at the bottom of the threaded hole of the through-portion 15. Specifically, the sealing gasket is a copper pad 16, which has a certain corrosion resistance. At the same time, because its material is relatively soft, it can produce a certain deformation after being squeezed to achieve a sealing effect. At the same time, a sealing ring 17 is also arranged between the end face of the penetration part 15 and the housing 21 of the sensor package 18 to perform secondary sealing and improve the sealing effect. Since the penetration part 15 is arranged in the electronic part housing 12, even if leakage occurs, it will not affect the mechanical part.

[0048] Specifically, Figure 2 and Figure 3As shown, in this embodiment, the sensor package includes a housing 21 and a detection module arranged inside the housing 21, and the detection module is a sensor 27. A connection structure is provided on the housing 21 for connecting with the device to be tested. In this embodiment, the meter connector 13 can also be used as a part of the device to be tested. The meter connector 13 is directly connected to the electrical device, and the meter connector 13 is also used as the device to be tested for the sensor package to measure. The connection structure of the housing 21 is also provided with an air inlet for introducing sulfur hexafluoride gas in the electrical device, and accordingly, an air inlet channel is provided in the connection structure. It is convenient to detect the density. Since sulfur hexafluoride has a certain pressure, the structural strength of the housing 21 needs to be ensured after the gas enters the housing 21, so the housing 21 is set as a metal housing 21. The sensor package also includes a conductor with one end passing through the plug and the other end connected to the sensor 27. At the same time, in order to facilitate the setting of the sensor 27, a circuit board 24 for fixing the sensor 27 is also provided, and the conductor includes a fixing part fixed in the circuit board 24 and a pin 22 passing through the circuit board 24.

[0049] like Figure 4 and Figure 5 As shown, the shell 21 is provided with an inlet for loading the sensor 27, and a plug 22 is fixedly provided on the inlet. The shell 21 and the plug 22 cooperate to complete the sealing and form an air chamber for the sensor 27 to detect. The shell 21 is roughly a hollow cylinder, with an opening at one end and an air inlet at the other end. The plug 22 is provided with an insertion structure adapted to the opening of the cylinder, and a step structure is provided at the end of the insertion structure on the plug 22 away from the cylinder, that is, a large diameter section and a small diameter section are formed on the plug 22, wherein the small diameter section is inserted into the opening of the cylinder, and the surface of the large diameter section adjacent to the small diameter section cooperates with the end face stopper of the cylinder and is finally fixedly connected by welding. An insertion hole for the fixed placement of the sensor 27 is formed in the small diameter section. The housing 21 is also provided with a receiving hole for receiving the plug 22. The receiving hole is a stepped hole. The large diameter section of the plug 22 is received in the stepped hole and fixed to the hole wall of the stepped hole by laser welding. At this time, a sealed connection is also formed between the plug 22 and the housing 21. Since the housing 21 is provided with a stud 23 structure, a screwing structure is also provided on the housing 21 for the convenience of screwing. Specifically, in this embodiment, the screwing structure is two relatively parallel planes provided on the outer wall of the housing 21. The provision of two parallel planes facilitates the application of force.

[0050] In order for the sensor 27 to work properly, it needs to be powered and transmit signals. Therefore, the conductor includes a signal conductor for outputting signals of the information detected by the sensor 27 and a power conductor for powering the detection module. The conductor is a pin 25, which includes a power pin and an information pin. The pin 25 also constitutes a rod-shaped conductor, which has a certain hardness and can play a supporting role. The pin 25 passes through the plug 22 and is fixed on the plug 22. Since the shell 21 is a metal shell 21, it is necessary to simultaneously ensure the mutual insulation between the pin 25 and the shell 21. Therefore, an insulating sealing structure made of an insulating material is provided between the shell 21 and the wire. In this embodiment, the insulating sealing structure is a glass 26 sintered between the pin 25 and the shell 21. The cover plate is provided with a perforation for the pin 25 to pass through. In this embodiment, the perforations are arranged in a straight line. There are four pins 25, so there are also four perforations. The sintering of the glass 26 not only achieves the insulation between the pin 25 and the shell 21, but also achieves sealing. In order to improve the sealing effect, epoxy resin is also provided in the insertion hole of the plug 22 . After curing, the epoxy resin can not only fix the circuit board 24 , but also achieve secondary sealing of the through hole on the plug 22 .

[0051] In Example 2 of the remote transmission density meter of the present invention: Regarding the setting of the remote transmission density meter, this example proposes a new arrangement form. Different from Example 1, in this example, a mechanical part housing and an electronic part housing are no longer provided, and the sensor package is directly provided in the mechanical part housing.

[0052] In Example 3 of the remote transmission density meter of the present invention: With respect to the setting of the remote transmission density meter, this example proposes a new arrangement. Different from Example 1, in this example, no seal is provided between the connection structure and the meter joint.

[0053] In Example 4 of the remote transmission density meter of the present invention: Regarding the setting of the remote transmission density meter, this embodiment proposes a new arrangement form. Different from Example 1, the remote transmission density meter in this embodiment no longer includes a meter connector, and the sensor package is directly connected to the device to be tested.

[0054] In Example 5 of the remote transmission density meter of the present invention: Regarding the setting of the shell, this embodiment proposes a new arrangement form. Different from Example 1, the screwing structure on the shell in this embodiment is the cylindrical outer peripheral surface of the shell.

[0055] In Example 6 of the remote transmission density meter of the present invention: Regarding the setting of the connection structure, this embodiment proposes a new arrangement form. Different from Example 1, the connection structure in this embodiment is a threaded hole, and a stud assembled with the threaded hole is provided on the device to be tested.

[0056] In Example 7 of the remote transmission density meter of the present invention: Regarding the setting of the shell, this embodiment proposes a new arrangement form. Different from Example 1, in this embodiment, a step hole is no longer set on the shell, but a cylindrical hole is set, and the plug cooperates with the end face stop of the shell, and the stop mating surfaces of the two are welded and fixed.

[0057] In Example 8 of the remote transmission density meter of the present invention: Regarding the setting of the shell and the plug, this example proposes a new arrangement. Different from Example 1, in this example, the shell and the plug are interference fit together.

[0058] In Example 9 of the remote transmission density meter of the present invention: Regarding the setting of the plug, this example proposes a new arrangement form. Different from Example 1, the plug in this example is set as a flat plate structure with perforations.

[0059] In Example 10 of the remote transmission density meter of the present invention: Regarding the setting of the sensor package, this embodiment proposes a new arrangement form. Different from Example 1, the sensor in this embodiment is no longer set on the circuit board, and the sensor is fixed inside the shell by a mounting bracket.

[0060] In Example 11 of the remote transmission density meter of the present invention: Regarding the setting of the sensor, this embodiment proposes a new arrangement form. Different from Example 1, in this embodiment, a conductor passing through a plug is no longer provided on the sensor, and the signal is directly sent out through the signal transmission module.

[0061] In the embodiment of the sensor package of the present invention, the sensor package of this embodiment has the same structure as the sensor package of any embodiment of the above-mentioned remote density meter, and will not be repeated here. Of course, in addition to the sensor for detecting density, other sensors such as temperature sensors and micro-water sensors can also be set in the sensor package to measure other parameters.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A sensor package, characterized in that: The invention comprises a shell, on which a connection structure for sealingly connecting with a device to be tested is arranged, a sensor is arranged in the shell, and the shell is also provided with an inlet for installing the sensor into the shell, a plug is sealed and fixedly connected at the inlet, and a channel for the medium to be tested to enter the shell is arranged in the connection structure.

2. The sensor package according to claim 1, characterized in that: The sensor is connected with a conductor, which passes through the plug in a sealed manner.

3. The sensor package according to claim 2, characterized in that: The sensor package comprises a circuit board, the sensor is mounted on the circuit board, the conductor comprises a fixing portion fixed in the circuit board and a pin passing through the circuit board, the pin passing through the plug and being sealed and fixed with the plug.

4. The sensor package according to claim 3, characterized in that: The plug is provided with a through hole for the conductor to pass through and an insertion hole which is connected with the through hole and for the end of the circuit board to extend into, and the end of the circuit board is fixed in the insertion hole.

5. The sensor package according to any one of claims 1 to 4, characterized in that: The plug is welded and fixed at the loading port.

6. The sensor package according to claim 5, characterized in that: The shell is provided with a stepped hole for accommodating a plug, and the plug is accommodated in the stepped hole and fixed to the hole wall of the stepped hole by welding.

7. The sensor package according to any one of claims 1 to 4, characterized in that: The connection structure is a stud, and a screwing structure is also provided on the shell.

8. A remote density meter, comprising an electronic detection module, characterized in that: The electronic detection module comprises the sensor package as claimed in any one of claims 1 to 6, wherein a housing of the sensor package is sealedly connected to a meter joint, and the meter joint constitutes the device to be tested.

9. The remote transmission density meter according to claim 8, characterized in that: The connection structure is a stud, a threaded hole is arranged on the gauge joint, and a sealing member is arranged between the connection structure and the gauge joint.

10. The remote transmission density meter according to claim 8 or 9, characterized in that: The remote transmission density meter comprises a mechanical part housing and an electronic part housing, the meter joint is respectively provided with a first air outlet extending into the mechanical part housing and a through-portion extending into the electronic part housing, the sensor package is arranged in the electronic part housing and is sealed and connected to the through-portion.

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