Rotational fusion welded high-pressure-resistant waterproof pressure switch

Abstract

The utility model relates to the technical field of waterproof pressure switches, and discloses a rotary fusion welding high-pressure-resistant waterproof pressure switch, the upper end of a shell is provided with an opening, the lower end of the shell extends downwards to form a drainage channel, a pressing cover is installed in the shell, a switch seat is in sealing connection with the opening, and the switch seat and the drainage channel are in sealing connection. The outer wall of the pressing cover and the inner wall of the shell are welded together through rotary fusion, a first installation cavity is formed between the pressing cover and the drainage channel, a second installation cavity is formed between the pressing cover and the switch base, the elastic piece assembly is installed in the first installation cavity, and the elastic piece assembly is installed in the second installation cavity. The switch assembly is located in the second installation cavity and fixedly connected with the switch base, the ejector rod penetrates through the pressing cover, one end of the ejector rod is connected with the elastic piece assembly, and the other end of the ejector rod is connected with the switch assembly. The utility model has the advantages of simple structure, stable performance and low cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of waterproof pressure switches, and particularly relates to a high-pressure-resistant waterproof pressure switch with spin welding. Background Art

[0002] A waterproof pressure switch is a switch used to detect whether the liquid pressure exceeds a set value and automatically disconnect the circuit when it exceeds. It is widely used in industrial fields such as water conservancy and hydropower, pressure vessels, chemical industry, and petroleum to prevent safety accidents caused by overpressure.

[0003] In the structural design of the existing waterproof pressure switches, for the components that need to bear pressure, such as the outer shell and the pressing cover, by embedding metal barbs at the upper end of the pressing cover and strongly pressing the pressing cover into the outer shell and relying on the tension force of the barbs to bear the pressure, or by making the outer shell and the pressing cover of metal materials and then connecting them together by metal welding. The above two methods have problems of complex structure, unreliable pressure-bearing performance, or high cost. Summary of the Utility Model

[0004] In order to solve the deficiencies of the above-mentioned existing technologies, the utility model provides a high-pressure-resistant waterproof pressure switch with spin welding, achieving the purposes of simple structure, stable performance, and low cost.

[0005] The technical purpose to be achieved by the utility model is realized through the following technical solutions:

[0006] The utility model provides a high-pressure-resistant waterproof pressure switch with spin welding, including an outer shell, a shrapnel assembly, a push rod, a pressing cover, a switch assembly, and a switch base;

[0007] An opening is formed at the upper end of the outer shell, a drainage channel extends downward at the lower end of the outer shell, the pressing cover is installed inside the outer shell, and the switch base is hermetically connected to the opening;

[0008] The outer wall of the pressing cover and the inner wall of the outer shell are spin-welded together, a first installation cavity is formed between the pressing cover and the drainage channel, and a second installation cavity is formed between the pressing cover and the switch base;

[0009] The shrapnel assembly is installed in the first installation cavity, the switch assembly is located in the second installation cavity and is fixedly connected to the switch base, the push rod passes through the pressing cover, and one end of the push rod is connected to the shrapnel assembly, and the other end of the push rod is connected to the switch assembly.

[0010] In some implementations, a first positioning structure for spin welding positioning is formed at the lower end of the outer shell, and a second positioning structure for spin welding positioning is formed at the upper end of the pressing cover. Through the first positioning structure and the second positioning structure, it is convenient to position the outer shell and the pressing cover during spin welding, improving the convenience and stability of spin welding.

[0011] In some implementations, the first positioning structure is a groove or a protrusion;

[0012] The second positioning structure is a groove or a protrusion, realizing the positioning function of the outer shell and the pressing cover.

[0013] In some implementations, glue is filled between the switch base and the opening, playing a sealing role in the connection between the switch base and the opening.

[0014] In some implementations, the switch assembly includes a first insert piece, a second insert piece, a moving spring piece, a static contact, and a moving contact located in the second installation cavity;

[0015] One end of the first insert piece passes through the switch base and is fixedly connected to the moving spring piece, one end of the second insert piece passes through the switch base and is fixedly connected to the static contact, and the moving contact is arranged on the moving spring piece and is in contact connection with the static contact;

[0016] The ejector rod pushes up the moving spring piece, disconnecting the moving contact from the static contact, realizing the on-off function of the waterproof pressure switch.

[0017] In some implementations, a first jack for the first insert piece to pass through and a second jack for the second insert piece to pass through are formed on the switch base;

[0018] Glue is filled between the upper end of the first jack and the first insert piece, and glue is filled between the upper end of the second jack and the second insert piece, playing a sealing and waterproof role through the filled glue.

[0019] In some implementations, the elastic piece assembly includes a diaphragm and a dome spring piece. The diaphragm is installed at the bottom of the first installation cavity, the dome spring piece is located between the ejector rod and the diaphragm, and the dome spring piece abuts against the ejector rod, realizing the pressure detection function of the waterproof pressure switch.

[0020] In some implementations, a first installation groove for limiting and installing the diaphragm is formed at the edge of the bottom of the first installation cavity, improving the installation accuracy and stability of the diaphragm.

[0021] In some implementations, a sealing ring is embedded and installed between the outer wall of the switch base and the inner wall of the outer shell, further improving the waterproof performance inside the outer shell.

[0022] In some implementations, an annular groove for embedding and installing the sealing ring is formed along the circumferential direction on the outer wall of the switch base, which improves the installation accuracy and stability of the sealing ring.

[0023] In summary, the present utility model has at least the following beneficial effects:

[0024] A high-pressure resistant and waterproof pressure switch for spin welding provided by the present utility model connects the components that need to bear pressure, namely the outer shell and the pressing cover, together by using spin welding technology. Compared with the method of bearing pressure through barbs, it has the advantages of simple structure and stable performance. And compared with the outer shell and the pressing cover made of metal materials, it also has the advantage of low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the waterproof pressure switch according to Embodiment 1 of the present utility model;

[0026] Figure 2 is an exploded view of the waterproof pressure switch according to Embodiment 1 of the present utility model;

[0027] Figure 3 is a sectional view of the waterproof pressure switch according to Embodiment 1 of the present utility model;

[0028] Figure 4 is a schematic structural diagram of the outer shell according to Embodiment 1 of the present utility model;

[0029] Figure 5 is a schematic structural diagram of the pressing cover according to Embodiment 1 of the present utility model;

[0030] Figure 6 is a sectional view of the waterproof pressure switch according to Embodiment 2 of the present utility model;

[0031] Figure 7 is a schematic structural diagram of the switch base according to Embodiment 2 of the present utility model;

[0032] Figure 8 is a sectional view of the waterproof pressure switch according to Embodiment 3 of the present utility model;

[0033] Figure 9 is a schematic structural diagram of the switch base according to Embodiment 3 of the present utility model;

[0034] 100. Outer shell; 110. Opening; 120. Drainage channel; 130. First positioning structure;

[0035] 200. Diaphragm assembly; 210. Diaphragm; 220. Dome spring;

[0036] 300. Thumb rod;

[0037] 400. Compression cover; 410. Second positioning structure;

[0038] 500. Switch assembly; 510. First insert piece; 520. Second insert piece; 530. Moving reed; 540. Stationary contact; 550. Moving contact;

[0039] 600. Switch base; 610. First jack; 620. Second jack; 630. Annular groove;

[0040] 700. First installation cavity; 710. First installation groove;

[0041] 800. Second installation cavity;

[0042] 900. Glue;

[0043] 101. Sealing ring. Specific embodiments

[0044] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments.

[0045] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0046] Example 1:

[0047] Please refer to Figures 1-5 , a high-pressure resistant and waterproof pressure switch for spin welding, which is used to sense the pressure of water or other liquids and is applied to household appliances such as water dispensers and air conditioners. The waterproof pressure switch includes a housing 100, a reed assembly 200, a push rod 300, a compression cover 400, a switch assembly 500 and a switch base 600.

[0048] Refer to Figures 1-3 , the housing 100 is used for the installation and fixation of other components. An opening 110 is formed at the upper end of the housing 100, and a drainage channel 120 extends downward at the lower end of the housing 100. The compression cover 400 is installed inside the housing 100, and the switch base 600 is sealingly connected to the opening 110.

[0049] The outer shape of the housing 100 can be presented as a cylindrical structure. The drainage channel 120 extends downward from the lower end of the housing 100 and is used to connect the outside and the inside of the housing 100. The internal structure of the housing 100 can match the outer shape structure of other components to adapt to the installation and fixation of other components. The pressing cover 400 is located inside the housing 100 and is used to cooperate with the installation and fixation of the elastic piece assembly 200, the ejector rod 300, and the switch base 600. The switch base 600 is used for the installation and fixation of the switch assembly 500. The switch base 600 is hermetically connected to the opening 110. Further, the outer wall of the switch base 600 is hermetically connected to the position of the inner wall of the housing 100 corresponding to the opening 110 to play a waterproof role.

[0050] The outer wall of the pressing cover 400 and the inner wall of the housing 100 are welded together by spin welding. A first installation cavity 700 is formed between the pressing cover 400 and the drainage channel 120, and a second installation cavity 800 is formed between the pressing cover 400 and the switch base 600.

[0051] Spin welding is to generate heat by rubbing the pressing cover 400 and the housing 100 against each other, so that the contact position between the outer wall of the pressing cover 400 and the inner wall of the housing 100 melts. Driven by an external pressure, the pressing cover 400 and the housing 100 are rotated and solidified into one body. In this embodiment, the spin welding technology is adopted to connect the pressing cover 400 that needs to bear pressure and the housing 100 together. Compared with the method of bearing pressure through barbs, it has the advantages of simple structure, high pressure resistance, and stable performance. Compared with the housing 100 and the pressing cover 400 made of metal materials, it also has the advantage of low cost.

[0052] The elastic piece assembly 200 is installed in the first installation cavity 700. The switch assembly 500 is located in the second installation cavity 800 and is fixedly connected to the switch base 600. The ejector rod 300 passes through the pressing cover 400, and one end of the ejector rod 300 is connected to the elastic piece assembly 200, and the other end of the ejector rod 300 is connected to the switch assembly 500.

[0053] It can be understood that a through hole for the ejector rod 300 to pass through is formed in the middle of the pressing cover 400. When the external pressure reaches a certain value, the pressure is applied to the elastic piece assembly 200 through the drainage channel 120. The elastic piece assembly 200 deforms, thereby pushing the ejector rod 300 to move in the direction of the switch assembly 500. Under the pushing action of the ejector rod 300, the switch assembly 500 disconnects, thereby realizing the pressure detection ability of this waterproof pressure switch.

[0054] See Figure 4 and Figure 5, in some embodiments, a first positioning structure 130 for spin welding positioning is formed at the lower end of the outer shell 100, and a second positioning structure 410 for spin welding positioning is formed at the upper end of the pressing cover 400. Through the first positioning structure 130 and the second positioning structure 410, it is convenient to position the outer shell 100 and the pressing cover 400 during spin welding, improving the convenience and stability of spin welding.

[0055] Both the outer shell 100 and the pressing cover 400 are circular structures. To ensure the positioning of the outer shell 100 and the pressing cover 400 during spin welding and to ensure that the outer shell 100 and the pressing cover 400 do not displace during spin welding, by forming the first positioning structure 130 at the lower end of the outer shell 100 and the second positioning structure 410 at the upper end of the pressing cover 400 respectively, the convenience and stability of the spin welding operation are achieved.

[0056] In some embodiments, the first positioning structure 130 is a groove or a protrusion, and the second positioning structure 410 is a groove or a protrusion, realizing the positioning function of the outer shell 100 and the pressing cover 400.

[0057] For example, the first positioning structure 130 is a protrusion, and the number of protrusions is four. The four protrusions are circumferentially spaced along the lower end of the outer shell 100. The second positioning structure 410 is a groove, and the number of grooves is also four. The four grooves are circumferentially spaced along the upper end of the pressing cover 400.

[0058] It should be noted that in this embodiment, the shapes and numbers of the first positioning structure 130 and the second positioning structure 410 are not specifically limited and can be adjusted according to actual needs. For example, the first positioning structure 130 is a groove and the second positioning structure 410 is a protrusion, etc. The number can also be set to three or five, etc.

[0059] Embodiment 2:

[0060] The difference between this embodiment and Embodiment 1 is that in this embodiment, further structural optimization is made to the waterproof pressure switch of the present utility model. Please refer to Figure 6 and Figure 7 .

[0061] Refer to Figure 6 , in this embodiment, glue 900 is filled between the switch base 600 and the opening 110. The curing of the glue 900 seals the connection between the switch base 600 and the opening 110. After the glue 900 cures, it forms an integral body with its related parts, having good sealing performance. External water cannot enter the interior of the switch base 600, thus protecting electrical safety. At the same time, the cured glue 900 has a certain strength, making the performance of this waterproof pressure switch more stable and reliable.

[0062] Specifically, glue 900 is filled between the outer wall of the switch base 600 and the position of the inner wall of the housing 100 corresponding to the opening 110 to ensure the waterproof seal between the inside of the switch base 600 and the inside of the housing 100. Of course, during specific installation, to ensure the installation stability of the switch base 600, the switch base 600 can be embedded and installed inside the housing 100. At this time, there is a certain distance between the upper end of the switch base 600 and the upper end of the opening 110. Similarly, the upper end of the switch base 600 can also be filled with glue 900, and the cured glue 900 is flush with the upper edge of the opening 110 to further ensure the installation stability of the switch base 600 and the overall waterproof seal.

[0063] In some embodiments, the switch assembly 500 includes a first insert piece 510, a second insert piece 520, and a moving contact spring piece 530, a static contact 540, and a moving contact 550 located in the second installation cavity 800.

[0064] One end of the first insert piece 510 passes through the switch base 600 and is fixedly connected to the moving contact spring piece 530. One end of the second insert piece 520 passes through the switch base 600 and is fixedly connected to the static contact 540. The moving contact 550 is arranged on the moving contact spring piece 530 and is in contact connection with the static contact 540.

[0065] That is, the other ends of the first insert piece 510 and the second insert piece 520 are both located outside the switch base 600 and are used to connect to an external power source. Under normal conditions, the moving contact 550 is in contact connection with the static contact 540 under the action of the moving contact spring piece 530. When the external pressure reaches a certain value, the pressure is applied to the elastic piece assembly 200 through the drainage channel 120. The elastic piece assembly 200 deforms, thereby pushing the ejector rod 300 to push up the moving contact spring piece 530, changing the position of the moving contact spring piece 530, and thus driving the moving contact 550 to separate from the static contact 540, disconnecting the connection of the switch assembly 500.

[0066] Similarly, when the external pressure is less than a certain value, the thrust of the elastic piece assembly 200 acting on the ejector rod 300 is less than the elastic force of the moving contact spring piece 530. At this time, the moving contact 550, under the elastic force of the moving contact spring piece 530, resumes the contact relationship with the static contact 540, connecting the switch assembly 500.

[0067] See Figure 7, in some embodiments, a first jack 610 for the first insert 510 to pass through and a second jack 620 for the second insert 520 to pass through are formed on the switch base 600, that is, the middle parts of the first insert 510 and the second insert 520 are fixedly connected to the switch base 600, while one end of the first insert 510 and one end of the second insert 520 are located in the first installation cavity 700 and are respectively used to connect with the moving reed 530 and the static contact 540, and the other ends of the first insert 510 and the second insert 520 are located outside the switch base 600 and are used to connect with an external power supply.

[0068] Glue 900 is filled between the upper end of the first jack 610 and the first insert 510, and glue 900 is filled between the upper end of the second jack 620 and the second insert 520. Filling the glue 900 serves the function of sealing and waterproofing.

[0069] It can be seen from the foregoing that glue 900 is filled between the switch base 600 and the opening 110. Here, glue 900 is filled between the upper end of the first jack 610 and the first insert 510, and glue 900 is filled between the upper end of the second jack 620 and the second insert 520. In the actual operation process, the filling operations of these two parts of glue 900 can be carried out synchronously, so that after the two parts of glue 900 are cured, they present an integral structure. Compared with the traditional waterproof switch structure that connects the top cover and the housing 100, this embodiment has the advantages of simple structure and stable performance.

[0070] Embodiment 3:

[0071] The difference between this embodiment and Embodiment 1 is that in this embodiment, further structural optimization is carried out on the waterproof pressure switch of the present utility model. Please refer to Figure 8 and Figure 9 .

[0072] Refer to Figure 8 , in this embodiment, the elastic piece assembly 200 includes a diaphragm 210 and a dome switch 220. The diaphragm 210 is installed at the bottom of the first installation cavity 700, and the dome switch 220 is located between the ejector rod 300 and the diaphragm 210. The dome switch 220 abuts against the ejector rod 300 to realize the pressure detection function of the waterproof pressure switch.

[0073] Specifically, when the external pressure reaches a certain value, the pressure is applied to the diaphragm 210 through the drainage channel 120. The diaphragm 210 deforms and thus pushes the dome switch 220, causing the dome switch 220 to drive the ejector rod 300 to push up the switch assembly 500.

[0074] Furthermore, a first installation groove 710 for limiting and installing the diaphragm 210 is formed at the edge of the bottom of the first installation cavity 700, improving the installation accuracy and stability of the diaphragm 210.

[0075] A protrusion structure is formed at the edge of the diaphragm 210. By limiting and installing the protrusion structure in the first installation groove 710 at the first installation cavity 700, the rapid and accurate installation of the diaphragm 210 can be achieved. At the same time, during the process of deforming the diaphragm 210 under pressure, the installation position at the edge of the diaphragm 210 can be ensured to remain unchanged.

[0076] In some embodiments, a sealing ring 101 is embedded and installed between the outer wall of the switch base 600 and the inner wall of the housing 100, further improving the waterproof performance inside the housing 100.

[0077] See Figure 9 , a circumferential annular groove 630 for embedding and installing the sealing ring 101 is formed on the outer wall of the switch base 600, improving the installation accuracy and stability of the sealing ring 101.

[0078] The measuring and high-point spot welding equipment for the battery cell and the protection board provided by the present utility model determines whether the specific spot welding position meets the requirements through double determination by ensuring the height of the spot welding position of the battery cell and combining the height of the spot welding position after the assembly of the battery cell and the protection board, avoiding problems such as over-welding or false welding, and improving the spot welding quality.

[0079] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0080] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present utility model is usually placed. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0081] In addition, terms such as "horizontal", "vertical", "overhanging", etc. do not require the components to be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0082] In the present utility model, unless otherwise clearly defined and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0083] Although the description of the present utility model is made in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications, and variations based on the above content. Therefore, all such substitutions, improvements, and variations are included within the spirit and scope of the appended claims.

Claims

1. A spin-melt-welded high-pressure waterproof pressure switch, characterized in that: It comprises a housing (100), a spring assembly (200), a push rod (300), a pressing cover (400), a switch assembly (500) and a switch seat (600); The upper end of the housing (100) is formed with an opening (110), the lower end of the housing (100) extends downward to form a drainage channel (120), the pressing cover (400) is installed inside the housing (100), and the switch seat (600) is sealed and connected to the opening (110); The outer wall of the pressing cover (400) and the inner wall of the housing (100) are welded together by spin welding, a first installation cavity (700) is formed between the pressing cover (400) and the drainage channel (120), and a second installation cavity (800) is formed between the pressing cover (400) and the switch seat (600); The spring assembly (200) is installed in the first installation cavity (700), the switch assembly (500) is located in the second installation cavity (800) and is fixedly connected to the switch seat (600), the push rod (300) passes through the clamping cover (400), and one end of the push rod (300) is connected to the spring assembly (200), and the other end of the push rod (300) is connected to the switch assembly (500).

2. The spin-melt-welded high-pressure waterproof pressure switch according to claim 1, characterized in that: The lower end of the housing (100) is formed with a first positioning structure (130) for spin-melting welding positioning, and the upper end of the pressing cover (400) is formed with a second positioning structure (410) for spin-melting welding positioning.

3. The high-pressure waterproof pressure switch of spin-melting welding according to claim 2 is characterized in that: The first positioning structure (130) is a groove or a protrusion; The second positioning structure (410) is a groove or a protrusion.

4. The spin-melt-welded high-pressure waterproof pressure switch according to claim 1, characterized in that: Glue (900) is filled between the switch seat (600) and the opening (110).

5. The high-pressure waterproof pressure switch of spin-melt welding according to any one of claims 1 to 4, characterized in that: The switch assembly (500) comprises a first plug-in sheet (510), a second plug-in sheet (520), a movable spring sheet (530), a static contact (540), and a movable contact (550) located in the second installation cavity (800); One end of the first plug piece (510) passes through the switch seat (600) and is fixedly connected to the moving reed piece (530); one end of the second plug piece (520) passes through the switch seat (600) and is fixedly connected to the static contact (540); the moving contact (550) is arranged on the moving reed piece (530) and is in contact with the static contact (540); The push rod (300) pushes up the moving reed (530) to disconnect the moving contact (550) from the static contact (540).

6. The spin-melt-welded high-pressure waterproof pressure switch according to claim 5, characterized in that: The switch seat (600) is formed with a first insertion hole (610) for the first plug piece (510) to pass through and a second insertion hole (620) for the second plug piece (520) to pass through; The space between the upper end of the first plug hole (610) and the first plug piece (510) is filled with glue (900), and the space between the upper end of the second plug hole (620) and the second plug piece (520) is filled with glue (900).

7. The spin-melt-welded high-pressure waterproof pressure switch according to claim 1, characterized in that: The spring sheet assembly (200) comprises a diaphragm (210) and a pot spring sheet (220); the diaphragm (210) is installed at the bottom of the first installation cavity (700); the pot spring sheet (220) is located between the top rod (300) and the diaphragm (210); and the pot spring sheet (220) abuts against the top rod (300).

8. The spin-melt-welded high-pressure waterproof pressure switch according to claim 7, characterized in that: A first installation groove (710) for limiting the installation of the diaphragm (210) is formed at the edge of the bottom of the first installation cavity (700).

9. The spin-melt-welded high-pressure waterproof pressure switch according to claim 1, characterized in that: A sealing ring (101) is embedded and installed between the outer wall of the switch seat (600) and the inner wall of the housing (100).

10. The spin-melt-welded high-pressure waterproof pressure switch according to claim 9, characterized in that: An annular groove (630) for embedding and installing the sealing ring (101) is formed along the circumferential direction on the outer wall of the switch seat (600).

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