CN212648584U

CN212648584U - Wire holder and use motorised valve and pressure sensor of this wire holder

Info

Publication number: CN212648584U
Application number: CN202021586192.6U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Climate and Appliance Controls Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-03-02
Anticipated expiration: 2030-08-04

Abstract

The utility model discloses a wire holder, including base and glass seat, the glass seat is formed at the inner chamber of base through the sintering mode by glass, a serial communication port, the base includes first section, second section and third section, the second section is located between first section and the third section, first section is the ring form, the second section is the ring form, the third section is the ring form, the external diameter of first section is greater than the external diameter of second section, the inner wall and the glass seat fixed connection of first section, the inner wall and the glass seat fixed connection of second section, the inner wall of third section is not connected with the glass seat, the inner wall of third section exceeds the up end of glass seat, the utility model discloses a wire holder can improve the sintering quality of glass seat in the wire holder, the utility model also discloses an use motorised valve and the pressure sensor of wire holder.

Description

Wire holder and use motorised valve and pressure sensor of this wire holder

Technical Field

The utility model relates to an electrical connection technical field especially relates to a connection terminal and use motorised valve and pressure sensor of this connection terminal.

Background

Fig. 1 is a partial schematic structural diagram of a wire holder in the background art. The wire holder 01 includes a housing 010 made of a metal material and a sintered glass body 011 located inside the housing 010, and stress exists between the housing 010 and the sintered glass body 011 due to different expansion coefficients of the materials. The upper end face of the sintered glass body 011 is flush with the upper end face of the thin section 020, and the pressure stress applied to the sintered glass body 011 by the shell 010 is also uneven due to uneven wall thickness of the shell 010, wherein the upper end pressure stress of the thin section 020 is particularly small, and the surface of the sintered glass body 011 at the inner side of the thin section is prone to cracking.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of wire holder, including base and glass seat, the glass seat by glass through the sintering mode formed in the inner chamber of base, the base includes first section, second section and third section, the second section is located first section with between the third section, first section is the ring form, the second section is the ring form, the third section is the ring form, the external diameter of first section is greater than the external diameter of second section, first section inner wall with glass seat fixed connection, the inner wall of second section with glass seat fixed connection, the inner wall of third section not with the glass seat is connected, the inner wall of third section exceeds the up end of glass seat.

According to the wire holder, the inner diameter of the first section and the inner diameter of the second section are arranged in an equal diameter mode, the inner wall of the first section is fixedly connected with the glass holder, the inner wall of the second section is fixedly connected with the glass holder, the inner wall of the third section is not connected with the glass holder, the inner wall of the third section is higher than the upper end face of the glass holder, and the sintering quality of the glass holder can be improved.

Another object of this application is to provide an motorised valve including above-mentioned connection terminal, the motorised valve includes the valve body part, the valve body part includes the casing and sets up in the inside motor of valve body part, the motor with the contact pin electricity of connection terminal is connected, the connection terminal the base with casing welded fastening. As the strength of the wire holder is improved, the reliability of the corresponding electrically operated valve is improved.

Still another object of the present application is to provide a pressure sensor including above-mentioned connection terminal, including the cover body, with cover body fixed connection's shell, the connection terminal includes pressure chip and a plurality of contact pin, the glass seat include with the corresponding glass seat axial through-hole of contact pin number, the contact pin runs through glass seat axial through-hole, the contact pin with glass seat fixed connection, the contact pin with the pressure chip electricity is connected.

The sintering quality of the glass base of the wire holder is improved, and correspondingly, the quality of an electric valve and a pressure sensor using the wire holder is improved.

Drawings

FIG. 1 is a schematic diagram of a prior art plug-in;

fig. 2 is a schematic structural diagram of a specific embodiment of the wire holder of the present invention;

FIG. 3 is a schematic view of the wire holder of FIG. 2 with the protective cover removed;

fig. 4 is a schematic structural diagram of a second embodiment of the wire holder of the present invention;

fig. 5 is a schematic structural diagram of a third embodiment of the wire holder of the present invention;

fig. 6 is a schematic structural diagram of an electric valve according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a fourth embodiment of the wire holder according to the present invention;

fig. 8 is a schematic structural view showing an embodiment of a pressure sensor using the wire holder shown in fig. 7.

Detailed Description

It should be noted that, if the directional terms such as "upper" and "lower" are used herein, they are defined with reference to the position shown in the drawings of the present specification, and it should be understood that the directional terms are used only for clarity and convenience of describing the technical solutions and should not limit the scope of protection.

In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions of the present application are further described below with reference to the accompanying drawings and specific embodiments.

References hereinafter to "constant diameter" or similar terms, not necessarily absolutely equal, allow for some machining error and the transitional junctions between the different parts allow for the presence of transitional arcs during machining.

Fig. 2 is a schematic structural diagram of a specific embodiment of the wire holder of the present invention, and fig. 3 is a schematic structural diagram of the wire holder shown in fig. 2 with the protective cover removed.

As shown in fig. 2 and 3, the wire holder 2 of the present embodiment includes a base 21 made of stainless steel material and a glass holder 22 located inside the base 21, wherein the glass holder 22 is formed by sintering glass in an inner cavity of the base 21.

The base 21 comprises a first section 211, a second section 212 and a third section 213, the second section 212 is positioned between the first section 211 and the third section 213, the first section 211 is annular, the second section 212 is annular, the third section 213 is annular, the outer diameter of the first section 211 is larger than that of the second section 212, the glass seat 22 is cylindrical, the inner wall of the first section 211 of the base 21 is attached to and fixedly connected with the outer wall of the glass seat 22, the inner wall of the second section 212 is attached to and fixedly connected with the outer wall of the glass seat 22, the inner wall of the third section 213 is not contacted with the glass seat 22, and the inner wall of the third section 213 is higher than the upper end face of the glass seat 22.

The wire holder of the present application is mainly intended to solve the problem of surface cracking of the glass holder 22 caused when the outer diameter of the first segment 211 is larger than the outer diameter of the second segment 212, that is, the wall thickness of the portion of the base 21 located on the peripheral side of the glass holder 22 is uneven due to structural limitations of the product. The outer diameter of the first section 211 is larger than that of the second section 212, the inner wall of the first section 211 is attached to and fixedly connected with the outer wall of the glass seat 22, the inner wall of the second section 212 is attached to and fixedly connected with the outer wall of the glass seat 22, the inner wall of the third section 213 is not contacted with the glass seat 22, and the inner wall of the third section 213 is higher than the upper end surface of the glass seat 22, so that the compressive stress borne by the glass seat 22 at the inner side of the second section 212 can be increased, the compressive stress borne by the glass seat 22 as a whole from the base 21 can be more uniform than the compressive stress borne by a glass body in the background technology, and thus, the glass surface of the glass seat 22 is in a micro-crack shrinkage tendency under the action of the uniform compressive stress, the sintering quality of the glass seat 22 is improved, and the quality.

In the wire holder of the present application, the structure of the outer wall of the base 21 may be variously changed under the above conditions.

The wire holder 2 further comprises a plurality of pins 23 (3 in the embodiment) arranged at intervals, the glass holder 22 comprises axial through holes 24 of the glass holder arranged at intervals corresponding to the number of the pins 23, the pins 23 penetrate through and are fixed in the axial through holes 24 of the glass holder, the glass holder is cylindrical, the glass holder 22 is formed in the base 21 through sintering by glass, the glass is used as an insulating material, and the diameter of the glass holder 22 is determined by the number of the pins 23 and the creepage distance. The larger the number of pins 23, the larger the creepage distance, and the larger the diameter of the glass holder 22. When the diameter of the glass base 22 is larger, the probability of microcracks existing on the surface or the edge of the glass base 22 is larger, and the distance between the upper end surface of the glass base 22 and the upper end surface of the third segment 213 (i.e. the value c below) needs to be increased appropriately, so that the glass base 22 can bear the compressive stress uniformly to the maximum extent.

As shown in fig. 3, the base 21 is made of stainless steel material, the inner diameter of the first section 211 is set to be equal, the inner diameter of the second section 212 is set to be equal, the inner diameter of the third section 213 is set to be equal, the inner diameters of the first section 211, the second section 212 and the third section 213 are equal, the outer diameter of the first section 211 is set to be equal, the outer diameter of the second section 212 is set to be equal, the outer diameter of the first section is defined as D1, the outer diameter of the second section is defined as D3, the inner diameter of the first section 2121 and the inner diameter of the second section 212 are defined as D2, the thickness of the glass seat 22 is defined as t, the height of the third section 213 is defined as c, and the glass seat 22 is used as a pressure-bearing member, and the thickness is determined by the pressure of. The greater the refrigeration system pressure, the diameter of the glass seat 22, the greater the glass thickness t. When the thickness of the glass holder 22 is larger, the compressive stress borne by the glass is more uneven, the distance (i.e., the value c) between the upper end surface of the glass holder 22 and the upper end surface of the third segment 213 needs to be increased properly, and the ratio of (D1-D2)/(D3-D2) is set to be greater than or equal to 2 and less than or equal to 5, so that c is greater than or equal to 2% of D2+ 2% t, the compressive stress borne by the glass holder 22 integrally from the base 21 is more even, and the improvement of the quality of the wire holder is facilitated.

As shown in fig. 2, the wire holder 2 further includes a protective sleeve 25, the protective sleeve 25 includes a protective sleeve axial through hole 26 disposed at an interval corresponding to the number of the pins 23, each pin 23 penetrates through one glass holder axial through hole and one protective sleeve axial through hole respectively, each pin 23 is fixedly connected with the glass holder 22, the base 21 further includes a fourth section 214 disposed on the upper side of the third section 213, the inner diameter of the fourth section 214 is disposed in an equal diameter manner, the inner diameter of the fourth section 214 is greater than that of the third section 213, a larger space is provided for the installation of the protective sleeve 25, and the outer wall of the protective sleeve 25 is matched with the inner wall of the fourth section 214. The protective sleeve 25 is arranged, so that the pins 23 can be insulated from each other, short circuit caused by mutual collision among the pins 23 is avoided, and the reliability of the wire holder is further improved.

Fig. 4 is a schematic structural diagram of a second embodiment of the wire holder according to the present invention. As shown in fig. 4, the wire holder 2A is different from the wire holder 2 of the first embodiment in that the inner diameter of the third segment 213A is set to be equal and the outer diameter of the third segment 213A is set to be equal. The third section 213A has an inner diameter and an outer diameter equal to the inner diameter and the outer diameter of the second section 212A, respectively. Such a wire holder may be used in a pressure sensor.

Fig. 5 is a schematic structural diagram of a third embodiment of the wire holder according to the present invention. The difference from the wire holder shown in the first embodiment is that the inner diameter and the outer diameter of the third section 213B of the wire holder 2B are equal to the inner diameter and the outer diameter of the second section 212B, respectively, and no protective cover 25 is provided.

The wire holder 2A shown in fig. 4 and the wire holder 2B shown in fig. 5 can also achieve the effect of improving the sintering quality of the glass holder in the first embodiment, and the description is not repeated here.

The utility model provides a connection terminal can be applied to the motorised valve, and figure 6 shows that is the utility model discloses a specific embodiment's of motorised valve structural schematic diagram. As shown in fig. 6, the electric valve includes a valve body 10, the valve body 10 includes a housing 11 and an electric motor 12 disposed inside the valve body 10, and further includes the wire holder of the present application. The following description will be given by taking as an example a wire holder according to an embodiment of fig. 2. The motor 12 is connected with the wire holder 2 electricity, and the base 21 and the casing 11 fixed connection of wire holder 2, specifically, welded fastening between the two specifically through laser welding welded fastening, and the cooling protection is done when laser welding, avoids welding the too big base 21 inflation that leads to wire holder 2 of heat, and the compressive stress that makes glass seat 22 receive diminishes and even turns into tensile stress and causes glass seat 22 to take place the crack expansion. Since the sintering quality of the glass holder 22 of the wire holder 2 is improved, accordingly, the quality of the motor-operated valve using the wire holder 2 is improved.

Fig. 7 is a schematic structural diagram of a fourth embodiment of the wire holder according to the present invention, and fig. 8 is a schematic structural diagram of a pressure sensor using the wire holder shown in fig. 7.

The pressure sensor comprises a cover body 100 and a shell 200 fixedly connected with the cover body 100, and further comprises a wire holder 2c, a base 21c of the wire holder 2c comprises a first section 211c, a second section 212c and a third section 213c, the wire holder 2c further comprises a glass holder 22c, a pressure chip (not shown) and a plurality of pins 23c, the glass holder 22c comprises glass holder axial through holes 24c with the number corresponding to that of the pins 23c, the pins 23c penetrate through the glass holder axial through holes 24c, the pins 23c are fixedly connected with the glass holder 22c, and the pins 23c are electrically connected with the pressure chip (not shown). Since the sintering quality of the glass holder 22c of the wire holder 2c is improved, accordingly, the quality of the pressure sensor using the wire holder 2c is improved.

The wire holder, the electric valve and the pressure sensor provided by the application are described above by way of example. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. The utility model provides a wire holder, includes base and glass seat, the glass seat by glass through the sintering mode formed in the inner chamber of base, its characterized in that, the base includes first section, second section and third section, the second section be located first section with between the third section, first section is the ring form, the second section is the ring form, the third section is the ring form, the external diameter of first section is greater than the external diameter of second section, the inner wall of first section with glass seat fixed connection, the inner wall of second section with glass seat fixed connection, the inner wall of third section not with glass seat is connected, the inner wall of third section exceeds the up end of glass seat.

2. The wire holder according to claim 1, wherein the glass holder has a cylindrical shape, the base is made of a stainless steel material, the outer diameter of the first section is arranged in a constant diameter, the outer diameter of the second section is arranged in a constant diameter, the outer diameter of the first section is defined as D1, the outer diameter of the second section is defined as D3, the inner diameter of the first section and the inner diameter of the second section are defined as D2, the ratio of (D1-D2)/(D3-D2) is 2 or more and 5 or less, the thickness of the glass holder is defined as t, and the height of the third section is defined as c, so that c is 2% or more of D2+ 2% t.

3. The wire holder according to claim 1 or 2, further comprising a protective sleeve and a plurality of contact pins, wherein the glass holder comprises glass holder axial through holes corresponding to the number of the contact pins, the protective sleeve comprises protective sleeve axial through holes corresponding to the number of the contact pins, the contact pins penetrate through the glass holder axial through holes and the protective sleeve axial through holes, the contact pins are fixedly connected with the glass holder, the base further comprises a fourth section located on the upper side of the third section, the inner diameter of the fourth section is equal in diameter, the inner diameter of the fourth section is larger than that of the third section, and the outer wall of the protective sleeve is matched with the inner wall of the fourth section.

4. An electric valve comprising a valve body part, the valve body part comprising a housing and an electric motor disposed inside the valve body part, characterized by further comprising the wire holder according to any one of claims 1-3, the electric motor being electrically connected to the contact pins of the wire holder, and the base of the wire holder being welded to the housing.

5. A pressure sensor comprises a cover body and a shell fixedly connected with the cover body, and is characterized by further comprising the wire holder as claimed in claim 1, wherein the wire holder comprises a pressure chip and a plurality of contact pins, the glass holder comprises glass holder axial through holes corresponding to the number of the contact pins, the contact pins penetrate through the glass holder axial through holes, the contact pins are fixedly connected with the glass holder, and the contact pins are electrically connected with the pressure chip.