Valve core position detection sensor and grounding structure for valve core position detection sensor

Abstract

The utility model provides a valve element position detection sensor and a grounding structure used for the valve element position detection sensor, the valve element position detection sensor comprises a shell, the shell is provided with a receiving piece, the adapter is configured to connect the shell to an electromagnetic valve, and a first containing space is formed; the first accommodating space is arranged in the valve core position detection sensor, so that the first accommodating space can accommodate a valve core of the electromagnetic valve and a magnet and a sensing element positioned at the valve core under the condition that the valve core position detection sensor is arranged on the electromagnetic valve, and the valve core position detection sensor can obtain the position of the valve core through the interaction between the sensing element and the valve core; the printed circuit board is provided with a matching piece corresponding to the receiving piece; the receiving member is configured to receive the mating member so as to ground the printed circuit board.

Description

Technical Field

[0001] The present application relates to a valve core position detection sensor, in particular a valve core position detection sensor for a solenoid valve. In addition, the present application also relates to a grounding structure for the valve core position detection sensor. Background Art

[0002] In the prior art, valve core position sensors are often used to detect the position of a solenoid valve's valve core in various operating states. These sensors comprise a printed circuit board (PCB) on which various electrical components are arranged. These sensors are capable of sensing, recording, processing, and / or transmitting information about the position of the solenoid valve core, thereby facilitating the monitoring and operation of the entire industrial equipment system in which the solenoid valve is located.

[0003] As an electrical component, the printed circuit board also needs to be grounded. In the prior art, this is accomplished through flexible wires. However, this method requires the use of wires and a series of other related parts, so the structure is complex and the assembly is time-consuming. This will also limit the robustness of the printed circuit board, further affecting the yield rate of the valve core position detection sensor and increasing its manufacturing cost. In addition, this grounding method takes up a lot of space, which unnecessarily increases the volume of the valve core position detection sensor, and the use of a flexible connection such as a wire for grounding will also cause grounding instability. These are all undesirable.

[0004] In view of but not limited to the above situation, it is desirable to provide a new valve core position detection sensor to solve the above problems or at least alleviate the above problems. Utility Model Content

[0005] The present application aims to provide a novel valve core position detection sensor, which is advantageous in at least one aspect over the prior art.

[0006] To this end, the present application provides, in one aspect, a valve core position detection sensor, characterized in that the valve core position detection sensor includes: a shell, the shell having a receiving part, an adapter, the adapter being configured to connect the shell to the solenoid valve and forming a first accommodating space, so that when the valve core position detection sensor is installed to the solenoid valve, the first accommodating space can accommodate the valve core of the solenoid valve and a magnet positioned at the valve core, a sensing element, wherein the valve core position detection sensor can obtain the position of the valve core through the interaction between the sensing element and the valve core, and a printed circuit board, the printed circuit board having a mating part corresponding to the receiving part; wherein the receiving part is configured to receive the mating part, thereby grounding the printed circuit board.

[0007] In a possible exemplary embodiment, the mating element is a spring structure, which is made of a conductive material and is arranged at a position close to the rear end of the printed circuit board.

[0008] In a feasible exemplary embodiment, the valve core position detection sensor also includes a pressure tube, which is arranged in the hollow structure formed by the adapter and fixed to the adapter via a first sealing ring. Via the pressure tube and the first sealing ring, the solenoid valve can be isolated relative to the housing.

[0009] In a possible exemplary embodiment, the mating component is a protrusion that is integrated with a printed circuit board and coated with a conductive coating.

[0010] In a possible exemplary embodiment, the shell has a cavity formed therein, which is capable of receiving a first portion of a printed circuit board, wherein a circuit for receiving, transmitting, and / or processing detected signals is arranged on the first portion, the adapter has a second accommodating space, and the second portion of the printed circuit board is configured to be located outside the shell and accommodated in the second accommodating space of the adapter.

[0011] In a possible exemplary embodiment, there are two protrusions, which are respectively arranged at the first and second accommodating spaces away from the housing and located at the top and bottom of the width range of the printed circuit board.

[0012] In a possible exemplary embodiment, the receiving element is a conductive receiving groove arranged in the housing, wherein the receiving groove is arranged at the rear end of the housing and is configured to receive and abut against the mating element.

[0013] In a possible exemplary embodiment, the adapter is connected to the housing via a sealing structure, and the end face of the adapter contacts the front end face of the housing, wherein the sealing structure is configured as a non-circular groove and has a retaining portion so as to retain a circular sealing ring.

[0014] In a possible exemplary embodiment, the retaining portion is one or more semicircular snap-fit ​​structures.

[0015] On the other hand, the present application also relates to a grounding structure for a valve core position detection sensor, characterized in that the valve core position detection sensor includes: a shell, the shell having a receiving part, an adapter, the adapter is configured to connect the shell to the solenoid valve and form a first accommodating space, so that when the valve core position detection sensor is installed to the solenoid valve, the first accommodating space can accommodate the valve core of the solenoid valve and a magnet positioned at the valve core, a sensing element, wherein the valve core position detection sensor can obtain the position of the valve core through the interaction between the sensing element and the valve core, and a printed circuit board that can be fastened to the shell, wherein the sensing element is configured to be fastened to the printed circuit board; the grounding structure includes: a mating part located at the printed circuit board; and a receiving part located at the shell, wherein the receiving part is configured to receive the mating part in an interference fit, thereby grounding the printed circuit board in a hard-connected manner.

[0016] The valve core position detection sensor and the grounding structure for the valve core position detection sensor according to the present application are integrated, one-piece designs, which have the following advantages: providing robust functionality, improving the effectiveness and efficiency of the valve core position detection sensor, and / or providing a compact structure that effectively utilizes space and significantly reduces the volume of the valve core position detection sensor, while also reducing manufacturing and assembly costs. This is desirable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A solenoid valve assembly according to one embodiment of the present application is shown.

[0018] Figure 2 Shown Figure 1 Another view of the solenoid valve assembly is shown, which shows a cross-sectional view of a valve core position detection sensor for a solenoid valve according to an embodiment of the present application.

[0019] Figure 3 Shown Figure 2 The valve core position detection sensor of the solenoid valve shown is matched with the valve core of the solenoid valve.

[0020] Figure 4 A bottom view of a housing of a valve core position detection sensor according to an embodiment of the present application is shown, illustrating a retaining portion for a sealing structure.

[0021] Figure 5 Shown Figure 4 Details of the retaining portion for the sealing structure.

[0022] Figure 6 A grounding structure according to an embodiment of the present application is shown, and in particular, a structure on a printed circuit board is shown.

[0023] Figure 7 FIG. 1 shows a grounding structure according to another embodiment of the present application, and particularly shows a structure on a printed circuit board.

[0024] Figure 8 The figure shows a grounding structure according to an embodiment of the present application, and in particular shows a structure on a housing of a valve core position detection sensor. DETAILED DESCRIPTION

[0025] Some possible embodiments of the present application are described below with reference to the accompanying drawings. It should be noted that the drawings are not drawn to scale. Some details may be enlarged for clarity, and some non-essential details may be omitted.

[0026] like Figure 1-2 FIG. 1 shows a solenoid valve assembly 100 according to an embodiment of the present application. The solenoid valve assembly 100 includes a solenoid valve 101 and a valve core position detection sensor 200 for the solenoid valve connected to the solenoid valve 101 (specifically, as shown in FIG. Figure 3 shown).

[0027] The position of the valve core 1011 varies in different operating states of the solenoid valve 101. A magnet (e.g., a permanent magnet) 102 is connected to or disposed on the valve core 1011 so that the magnet 102 and the valve core 1011 can move together. The valve core position detection sensor 200 can detect the position of the valve core 1011 through interaction, such as electromagnetic effect, between the magnet 102 disposed on the valve core 1011 of the solenoid valve 101 and a sensing element 201 included in the valve core position detection sensor 200.

[0028] The valve core position detection sensor 200 further includes a printed circuit board 202. The printed circuit board 202 is arranged so that its plane is parallel to the longitudinal direction ( Figure 2 In this way, the plane of the conventional printed circuit board is extended in the horizontal direction ( Figure 2 (shown in the direction perpendicular to the paper), the valve core position detection sensor 200 disclosed in this application can have a larger area of ​​the printed circuit board 202. This can allow the printed circuit board 202 to carry more circuit elements, thereby being able to perform more complex and precise monitoring functions.

[0029] The sensing element 201 has a sensing surface (front surface) 2011 that interacts with the magnet 102. The sensing surface 2011 extends in a lateral direction, perpendicular to the extension direction of the printed circuit board 202 and is fastened into the printed circuit board 202 (eg via an interference fit).

[0030] The valve core position sensor 200 also includes a housing 203. The housing 203 defines a cavity within it, which is capable of receiving the first portion 202a of the printed circuit board 202. The first portion 202a is primarily wired with various circuits for receiving, transmitting, and / or processing detected signals. Accordingly, the housing 203 includes an upper groove 2031 and a lower groove 2032 extending longitudinally therein for securing the printed circuit board 202 (the first portion 202a).

[0031] Furthermore, the second portion 202b of the printed circuit board 202 is configured to be located outside the housing 203 and accommodated in a second accommodation space of the adapter (described below), wherein the sensing element 201 is disposed in the second portion 202b. The area of ​​the second portion 202b can be smaller than that of the first portion 202a. For example, the second portion 202b can be configured as a tab extending from the first portion 202a toward the solenoid valve 100.

[0032] The valve core position detection sensor 200 also includes an adapter 204. The adapter 204 is used to connect the housing 203 to the solenoid valve 100. The adapter 204 has a hollow structure. A pressure tube 205 is arranged in the hollow structure. The pressure tube 205 is fixed to the adapter via a first sealing ring 206, and the adapter is divided into a front portion 204a that contacts the solenoid valve 100 (wherein the front portion 204a and the pressure tube 205 define a corresponding first accommodation space) and a rear portion 204b that contacts the housing 203 (wherein the rear portion 204b and the pressure tube 205 define a corresponding second accommodation space). The pressure tube 205 and the first sealing ring 206 can isolate the solenoid valve 100 from the housing 203. The adapter 204 is configured to connect the housing 203 to the solenoid valve 100 and enable the first accommodation space to accommodate the valve core 1011 of the solenoid valve 100 and the magnet 102 positioned at the valve core 1011 when the valve core position detection sensor 200 is installed in the solenoid valve 100 .

[0033] It can be understood that the "pressure tube" referred to in this article refers to a sealing element, which can prevent the pressure caused by the lubricating oil in the solenoid valve 100 from affecting the valve core position detection sensor 200 and prevent the lubricating oil from leaking into the valve core position detection sensor 200 and causing contamination.

[0034] The front portion 204a of the adapter 204 can be inserted (e.g., screwed into place via a threaded structure) into the solenoid valve 100, and the solenoid valve 100 is isolated from the external environment by the second sealing ring 207. When the adapter 204 is inserted into the solenoid valve 100, the magnet 102, which is connected to and moves with the valve core 1011, can be positioned near the pressure tube 205. The magnet 102 may include a first portion and a second portion. The first portion of the magnet 102 is embedded in the valve core 1011 of the solenoid valve 100. The first portion may be fastened to the valve core 1011, for example, by an interference fit and / or adhesive bonding, while the remaining second portion (e.g., the portion distal to the valve core 1011 and proximal to the sensor element 201) is exposed outside the valve core 1011. In this manner, magnetic field interaction between the valve core 1011 and the sensor element 201 can be facilitated. The surface of the first portion of the magnet 102 facing the sensing element 201 can be configured to have a transverse cross-sectional area corresponding to (e.g., equal to) the transverse cross-sectional area of ​​the sensing element 201. In this way, the magnetic field effect of the magnet 102 can be enhanced. The transverse cross-sectional area of ​​the second portion can be configured to be smaller than the transverse cross-sectional area of ​​the first portion. In this way, the material cost of the magnet 102 can be reduced.

[0035] The structure and / or material of the pressure tube 205 can be configured to facilitate magnetic field induction between the magnet 102 and the sensing element 201. For example, the pressure tube 205 can be made of stainless steel. In this way, the magnetic field interaction between the valve core 1011 and the sensing element 201 can be facilitated. Accordingly, the structure and / or material of the adapter 204 can be configured to prevent (isolate) the external magnetic field from interfering with the magnetic field induction between the magnet 102 and the sensing element 201. For example, the adapter 204 can be made of a magnetic material.

[0036] The rear portion 204b of the adapter 204 is connected to the housing 203 via a sealing structure 209, and the end surface of the rear portion 204b contacts the front surface of the housing 203. Furthermore, the hollow structure of the adapter 204 defines a groove between the end surface of the rear portion 204b and the pressure tube 205. This groove is configured to receive the second portion 202b of the printed circuit board 202, completely housing the sensing element 201 within the groove. Thus, the sensing element 201 is protected by the adapter 204 from magnetic field interference from the external environment. For example, the longitudinal extension of the groove is greater than or equal to 2.5 mm.

[0037] like Figure 4-5, which respectively show the overall shape and details of the sealing structure 209. The shape of the sealing structure 209 is designed to be a groove with a non-circular shape (this is caused by, for example, the positioning of the fixing opening), for example, a groove with a substantially rounded rectangular shape, such as a circular (rubber) sealing ring known to those skilled in the art.

[0038] A retaining portion (e.g., a sheet-like protruding structure) 209a is further provided on the groove of the sealing structure 209. The retaining portion 209a is configured to fasten the sealing ring in the groove of the sealing structure 209. The retaining portion 209a can be formed into a pair of semicircular snap-fit ​​structures (e.g., Figure 4-5 As shown in ). It is understood that the holding portion 209a can also be formed into any other suitable shape. The number of the holding portion 209a can be one or more. For example, Figure 4-5 As shown, the sealing structure 209 has four retaining portions 209a. The retaining portions 209a can be arranged at positions where the curvature of the groove is greater than the curvature of the sealing ring. Figure 4-5 As shown, four retaining portions 209a are arranged at the rounded corners of the rounded rectangular groove. In this way, a sealing ring, especially a circular sealing ring, can be applied to a non-circular sealing structure.

[0039] This application also discloses a grounding structure for a printed circuit board (PCB) 202. In the prior art, electrical conductors are often used to ground the PCB 202. This approach requires numerous components, takes up excessive space, and increases costs. The grounding structure disclosed in this application is integrated into the PCB 202, reducing unnecessary components and facilitating installation.

[0040] This application discloses a grounding connection structure using a hard connection method for a printed circuit board 202. Specifically, the printed circuit board 202 has a mating piece, and the housing 203 has a corresponding receiving piece, so that the mating piece is received in an interference fit manner, thereby grounding the printed circuit board 202.

[0041] This fitting can be realized as a spring structure. Figure 6 As shown, a spring structure 2021 made of conductive material is arranged near the rear end of the printed circuit board 202. The spring structure 2021 can be fastened to the printed circuit board 202 by welding or the like. The number of the spring structures 2021 can be one or more. For example, Figure 6 As shown, a spring structure 2021 is shown, which is arranged at the bottom of the printed circuit board 202.

[0042] In addition, such a fitting can be realized as an integrated protrusion. Figure 7As shown, the printed circuit board 202 may further include a protrusion 2022 coated with a conductive coating. The number of the protrusion 2022 may be one or more. Figure 7 As shown, there are two protrusions 2022, which are respectively arranged at the top and bottom of the printed circuit board 202. It can be understood that the protrusions 2022 and the printed circuit board 202 can be formed into an integral structure.

[0043] The receiving member can be implemented as a receiving groove arranged in the housing 203. The receiving groove is coated with a conductive coating. Specifically, the receiving groove 2033 is arranged at the rear end of the housing 203 (the end away from the solenoid valve) and is configured to receive and abut against the mating member. Figure 8 As shown, the two receiving grooves 2033 are respectively arranged at the rear ends of the upper groove 2031 and the lower groove 2032.

[0044] It can be understood that the sensing element referred to in this application can be a Hall element utilizing the Hall effect.

[0045] It can be understood that the solenoid valve referred to in this application can be an on-off (two-position) valve.

[0046] The present application also provides a grounding structure for a valve core position detection sensor.

[0047] It can be understood that the “front” and “rear” referred to in this application are relative to facing the solenoid valve.

[0048] As used herein, the term "comprising" is open ended and includes one or more stated features, elements, components, or functions, but does not preclude the presence or addition of one or more other features, elements, components, functions, or combinations thereof.

[0049] The foregoing description of embodiments of the application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed. Many modifications and variations are possible in light of the above teaching. It is intended that the scope of the application be limited not with the specifically described embodiments thereof, but rather by the claims appended hereto. That is, all embodiments and / or features of any embodiment can be taken in any combination conceivable unless such features are mutually inconsistent. It is intended that each element of an independent claim be interpreted to embrace alternative elements to the same function where such alternative would render a claim invalid over prior art. It is intended that the scope of the application be defined by the claims appended hereto rather than being constricted by the description that has been presented herein.

Claims

1. A valve core position detection sensor (200), characterized in that: The valve core position detection sensor (200) comprises: a housing (203), the housing (203) having a receiving member, an adapter (204) configured to connect the housing (203) to the solenoid valve (100) and having a first accommodation space formed therein, so that the first accommodation space can accommodate the valve core (1011) of the solenoid valve (100) and the magnet (102) positioned at the valve core (1011) when the valve core position detection sensor (200) is mounted on the solenoid valve (100), A sensing element (201), wherein the interaction between the sensing element (201) and the valve core (1011) enables the valve core position detection sensor (200) to obtain the position of the valve core (1011), and a printed circuit board (202), the printed circuit board (202) having a mating piece corresponding to the receiving piece; The receiving member is configured to receive the mating member, thereby grounding the printed circuit board (202).

2. The valve core position detection sensor (200) according to claim 1, characterized in that: The matching piece is a spring structure (2021) which is made of conductive material and is arranged at a position close to the rear end of the printed circuit board (202).

3. The valve core position detection sensor (200) according to claim 1, characterized in that: The invention also includes a pressure tube (205), which is arranged in the hollow structure formed by the adapter (204) and fixed to the adapter (204) via a first sealing ring (206). The solenoid valve (100) can be isolated from the housing (203) via the pressure tube (205) and the first sealing ring (206).

4. The valve core position detection sensor (200) according to claim 1, characterized in that: The mating part is a protrusion (2022), which is integrated with the printed circuit board (202) and coated with a conductive coating.

5. The valve core position detection sensor (200) according to claim 2, characterized in that: The housing (203) has a cavity formed therein, the cavity being capable of receiving a first portion (202a) of a printed circuit board (202), wherein a circuit for receiving, transmitting, and / or processing a detected signal is arranged on the first portion (202a), The adapter (204) is formed with a second accommodation space, and the second portion (202b) of the printed circuit board (202) is configured to be located outside the housing (203) and accommodated in the second accommodation space of the adapter.

6. The valve core position detection sensor (200) according to claim 4, characterized in that: There are two protrusions (2022), which are respectively arranged in the first and second accommodating spaces away from the housing and located at the top and bottom of the width range of the printed circuit board (202).

7. The valve core position detection sensor (200) according to claim 1, characterized in that: The receiving member is a conductive receiving groove (2033) arranged in the housing (203), wherein the receiving groove (2033) is arranged at the rear end of the housing (203) and is configured to receive and abut against the mating member.

8. The valve core position detection sensor (200) according to any one of claims 1 to 7, characterized in that: The adapter (204) is connected to the housing (203) via a sealing structure (209), and the end face of the adapter (204) and the front end face of the housing (203) are in contact with each other, wherein the sealing structure (209) is configured as a non-circular groove and has a retaining portion (209a) so as to be able to retain a circular sealing ring.

9. The valve core position detection sensor (200) according to claim 8, characterized in that: The retaining portion (209a) is one or more semicircular snap-fit ​​structures.

10. A grounding structure for a valve core position detection sensor, capable of being used in conjunction with the valve core position detection sensor according to any one of claims 1 to 9, characterized in that include: a mating member located at the printed circuit board (202); and a receiving member located at the housing (203), The receiving member is configured to receive the mating member in an interference fit, thereby grounding the printed circuit board (202) in a hard-connected manner.

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