Pressure switch structure
By introducing buffer components into the pressure switch, including buffer seats and elastic plates, the problem of traditional pressure switches being susceptible to impact when pressure changes, significantly improving the stability and durability of the switch and extending the service life.
Patent Information
- Application Number
- CN202421219901.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-31
AI Technical Summary
During the pressure change process, especially when the pressure suddenly increases or decreases, the contacts are susceptible to greater impact, resulting in poor contact or deformation or damage to the contacts.
A pressure switch structure is adopted, including a housing, a pressure chamber, a pin, a pressure joint, a connecting piece, a moving contact point, a static contact point, a buffer assembly, etc. The buffer assembly includes a buffer seat and an elastic sheet. The elastic sheet cooperates with the buffer seat to absorb and disperse the impact force of the top rod and reduce direct impact on the contacts.
The setting of the buffer assembly reduces the possibility of poor contact or damage caused by impact, improves the stability and durability of the switch, and extends the service life of the contacts.
Smart Images
Figure CN222440457U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of switch devices, and in particular to a pressure switch structure. Background Art
[0002] Pressure switches are mainly used to detect system pressure. When the pressure reaches the set value, the state of its auxiliary contacts will change, thereby achieving control of the system or equipment. It is widely used in the fields of petroleum, chemical industry, metallurgy, electricity, water supply, etc. It is used for measuring and controlling the gauge pressure and absolute pressure of various gases and liquids. It is an ideal intelligent measurement and control instrument for industrial sites.
[0003] A pressure switch is an electrical contact device that drives the switch through the action of gas or liquid pressure. When the driving pressure of the power element by the external gas or liquid can overcome the elastic force of the compression spring, it will push the piston push rod upward, causing the micro switch to operate (that is, the normally closed contact is disconnected and the normally open contact is closed) to control the circuit on and off.
[0004] In the related art, during the process of pressure changes, especially when the pressure suddenly increases or decreases, the contacts of traditional pressure switches are often susceptible to greater impacts, and the surface material of the contacts will gradually wear out, which may lead to poor contact or deformation or damage of the contacts themselves, so there is room for improvement. Utility Model Content
[0005] In order to solve the problem that pressure changes in traditional pressure switches easily cause contact wear, the present application provides a pressure switch structure.
[0006] A pressure switch structure provided in this application adopts the following technical solution:
[0007] A pressure switch structure comprises a shell, a pressure chamber is arranged inside the shell, a push rod is movably installed in the pressure chamber, a pressure joint for driving the push rod is arranged at the end of the push rod, a connecting piece is also arranged on the push rod, two moving contact points are symmetrically arranged on the connecting piece, two static contact points are arranged in the pressure chamber, the two static contact points correspond to the two moving contact points respectively, each static contact point is respectively provided with a wiring piece, a reset component for resetting is arranged on the push rod, a buffer component is arranged in the pressure chamber, the buffer component comprises a buffer seat and an elastic sheet, the buffer seat is connected to the connecting piece, the elastic sheet is connected in the pressure chamber, the elastic sheet is arranged above the buffer seat, the elastic sheet cooperates with the buffer seat, and the buffer component also comprises an adjusting member for adjusting the extension length of the elastic sheet.
[0008] Since the contacts of traditional pressure switches are often susceptible to greater impacts during pressure changes, especially when the pressure suddenly increases or decreases, the surface material of the contacts will gradually wear out, which may lead to poor contact or deformation or damage of the contacts themselves; by adopting the above technical solution, including a shell, a pressure chamber is opened in the shell, and a buffer component is installed in the pressure chamber, and the buffer component includes a buffer seat and an elastic sheet; when the pressure switch is subjected to pressure changes, the external pressure acts on the pressure joint, and this force will be transmitted to the push rod, pushing the push rod to move in the pressure chamber, and as the push rod moves, the connecting plate and the moving contact point thereon will also move accordingly, and the distance between the moving contact point and the static contact point gradually changes, and preparation is made. The contact action is performed; when the top rod is subjected to a large impact force, the buffer seat will first contact the elastic sheet above. The elastic sheet has a certain elasticity and buffering capacity, which can effectively absorb and disperse the impact force on the top rod and reduce the direct impact on the contacts. The contact or separation action between the contacts will be smoother and softer, reducing the possibility of poor contact or damage caused by impact; the stability and durability of the switch are greatly improved through the settings of the buffer seat, elastic sheet, adjustment piece, etc. The elastic sheet can effectively absorb and disperse the impact force with its excellent elasticity and buffering capacity, thereby reducing the excessive direct impact on the contacts, significantly reducing the possibility of poor contact or damage caused by impact, and extending the service life of the contacts.
[0009] Optionally, an annular portion is provided at one end of the elastic sheet close to the connecting sheet, and an annular groove for matching with the annular portion is provided on the top of the buffer seat.
[0010] By adopting the above technical solution, the annular portion is integrally formed on the elastic sheet, and an annular groove is provided on the buffer seat; through the provision of the annular portion and the annular groove, the fit between the elastic sheet and the buffer seat is made tighter and more stable, ensuring that the elastic sheet and the buffer seat are not easily misaligned when subjected to a large impact force or pressure change, thereby ensuring the continuity and stability of the buffer effect.
[0011] Optionally, the adjusting member includes a fixing plate and a fixing screw, the fixing plate is connected in the pressure chamber, a sliding groove is provided on the fixing plate, a bending portion is provided at the end of the elastic plate, the bending portion is slidably connected in the sliding groove, and the fixing screw passes through the fixing plate and is tightened on the bending portion.
[0012] By adopting the above technical solution, the adjusting member includes a fixing plate and a fixing screw; when the elastic plate needs to be adjusted, the fixing screw is loosened to allow the bent portion of the elastic plate to slide in the slide groove until the elastic plate is adjusted to a suitable position, and the fixing screw is tightened to fix it; by setting the fixing plate and the fixing screw, the position of the elastic plate can be accurately adjusted according to actual needs, so that the pressure switch can adapt to different working environments and pressure change ranges, thereby improving its adaptability and flexibility, while simplifying the adjustment process without the need for complicated disassembly or reinstallation processes.
[0013] Optionally, the reset assembly includes a damping spring and a spring seat, the spring seat is connected in the pressure chamber, the spring seat is arranged on the top of the push rod, the damping spring is sleeved on the push rod, one end of the damping spring is connected to the spring seat, and the other end of the damping spring is connected to the outer wall of the push rod.
[0014] By adopting the above technical solution, the reset component includes a damping spring and a spring seat; when the pressure joint no longer transmits force to the push rod, the reset component immediately starts and plays its role. At this time, due to the interruption of the force of the pressure joint, the push rod is no longer affected by the external pressure and begins to move toward its initial position. The damping spring sleeved on the push rod begins to play a role. The damping spring begins to gradually release the potential energy stored due to the pressure before. This potential energy is converted into kinetic energy for the retraction of the push rod, helping the push rod to return to its initial position smoothly and quickly; through the setting of the damping spring and the spring seat, it can return to its initial position quickly and smoothly. Thanks to the energy storage and release characteristics of the damping spring and the stable support of the spring seat, the reliability and service life of the equipment are improved, and the operating efficiency of the equipment is also improved.
[0015] Optionally, a positioning ring for fixing the position of the spring is provided on the outer wall of the push rod, and the connecting piece is sleeved on the positioning ring.
[0016] By adopting the above technical solution, the positioning ring is integrally formed on the outer wall of the push rod, and the connecting piece is sleeved on the positioning ring; through the setting of the positioning ring, the position of the damping spring is effectively fixed, ensuring that the damping spring can play a stable role during the working process, reducing the possibility of working failure caused by loose or falling parts, and improving the overall stability of the reset assembly.
[0017] Optionally, a positioning step is provided on the outer wall of the positioning ring, the positioning step is provided along the circumferential direction of the positioning ring, and the connecting piece is arranged on the positioning step.
[0018] By adopting the above technical solution, a positioning step is provided on the positioning ring, and the connecting piece is installed on the positioning ring through the positioning step; by setting the positioning step, the accurate position of the connecting piece on the positioning ring is ensured, and the deviation and misalignment during the installation process are reduced. The positioning step provides a clear guide for the installation of the connecting piece, making the installation process simpler and faster, and improving production efficiency.
[0019] Optionally, an elastic pad is provided in the pressure chamber, and the elastic pad is arranged at one end of the connecting piece away from the dynamic contact point.
[0020] By adopting the above technical solution, the elastic pad is installed in the pressure chamber; through the setting of the elastic pad, the impact force of the collision can be effectively reduced, thereby reducing component damage or noise caused by the collision, protecting the connecting plate and the bottom wall of the pressure chamber, helping to extend the service life and improve the reliability of the equipment.
[0021] Optionally, a plurality of elastic protrusions are provided on the upper surface of the elastic pad, and the plurality of elastic protrusions are arranged on the elastic pad at intervals.
[0022] By adopting the above technical solution, a number of elastic protrusions are integrally formed on the surface of the elastic pad; by setting a number of elastic protrusions, the buffering and shock absorbing capabilities of the elastic pad are further enhanced, the elastic protrusions can more effectively absorb and disperse the impact force, reduce the impact energy transmitted to the connecting plate or the bottom wall of the pressure chamber, and help reduce the vibration and impact damage of the components.
[0023] In summary, the present application includes at least one of the following beneficial technical effects:
[0024] When the push rod is subjected to a large impact force, the buffer seat will first contact the elastic sheet above. The elastic sheet has a certain elasticity and buffering capacity, which can effectively absorb and disperse the impact force on the push rod, reduce the direct impact on the contacts, and the contact or separation action between the contacts will be smoother and softer, reducing the possibility of poor contact or damage caused by impact; the stability and durability of the switch are greatly improved by the settings of the buffer seat, elastic sheet, adjustment piece, etc. The elastic sheet can effectively absorb and disperse these impact forces with its excellent elasticity and buffering capacity, thereby reducing excessive direct impact on the contacts, significantly reducing the possibility of poor contact or damage caused by impact, and extending the service life of the contacts;
[0025] The arrangement of the annular portion and the annular groove makes the fit between the elastic sheet and the buffer seat tighter and more stable, ensuring that the elastic sheet and the buffer seat are not easily misaligned when subjected to a large impact force or pressure change, thereby ensuring the continuity and stability of the buffer effect;
[0026] By setting the damping spring and the spring seat, it can return to its original position quickly and smoothly. Thanks to the energy storage and release characteristics of the damping spring and the stable supporting effect of the spring seat, the reliability and service life of the equipment are improved, and the operating efficiency of the equipment is also improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural schematic diagram of a pressure switch structure in an embodiment of the present application.
[0028] Figure 2 It is a cross-sectional view of a pressure switch structure in an embodiment of the present application.
[0029] Figure 3 It is a partial cross-sectional view used to illustrate the structure of the adjusting member in the embodiment of the present application.
[0030] Explanation of the accompanying drawings: 1. housing; 2. pressure chamber; 3. push rod; 4. pressure joint; 5. connecting piece; 6. moving contact point; 7. static contact point; 8. wiring piece; 9. reset assembly; 91. damping spring; 92. spring seat; 10. buffer assembly; 101. buffer seat; 102. elastic sheet; 103. adjusting member; 1031. fixing sheet; 1032. fixing screw; 11. annular portion; 12. annular groove; 13. bending portion; 14. positioning ring; 15. positioning step; 16. elastic pad; 17. elastic protrusion; 18. slide groove. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-3 This application is described in further detail.
[0032] The present application embodiment discloses a pressure switch structure. Figure 1 and Figure 2 The pressure switch structure includes a shell 1. In this embodiment, the shell 1 can be a detachable structure. A pressure chamber 2 is opened inside the shell 1. A push rod 3 is movably installed in the pressure chamber 2, and a pressure joint 4 is installed at the end of the push rod 3; when the pressure switch is subjected to pressure changes, the external pressure acts on the pressure joint 4, and this force will be transmitted to the push rod 3, pushing the push rod 3 to move in the pressure chamber 2.
[0033] Reference Figure 2, a reset assembly 9 is installed at one end of the push rod 3 away from the pressure joint 4, and the reset assembly 9 includes a damping spring 91 and a spring seat 92. The spring seat 92 is installed on the top wall of the pressure chamber 2. In this embodiment, the spring seat 92 can be fixed by bolts, and the damping spring 91 is sleeved on the push rod 3. A positioning ring 14 is integrally formed on the outer wall of the push rod 3. One end of the damping spring 91 is mounted and fixed on the spring seat 92, and the other end of the damping spring 91 is mounted and fixed on the positioning ring 14. The damping spring 91 has a damper; when the force of the pressure joint 4 is interrupted, the push rod 3 is no longer affected by the external pressure and begins to move toward its initial position. The damping spring 91 sleeved on the push rod 3 begins to play a role, and the damping spring 91 begins to gradually release the potential energy stored due to the pressure before. This potential energy is converted into kinetic energy for the retraction of the push rod 3, helping the push rod 3 to return to its initial position smoothly and quickly.
[0034] Reference Figure 2 A positioning step 15 is provided on the outer wall of the positioning ring 14, and the positioning step 15 is provided along the circumferential direction of the positioning ring 14. A connecting piece 5 is installed at the positioning step 15, and two moving contact points 6 are symmetrically installed on the connecting piece 5. Two static contact points 7 are installed in the pressure chamber 2, and the two moving contact points 6 correspond to the two static contact points 7 one by one. Each static contact point 7 is installed with a wiring piece 8, and the wiring piece 8 extends toward the outside of the housing 1.
[0035] Reference Figure 2 An elastic pad 16 is installed on the bottom wall of the pressure chamber 2. In this embodiment, the elastic pad 16 is made of rubber material. The elastic pad 16 is located at the end of the connecting piece 5 away from the dynamic contact point 6. A plurality of elastic protrusions 17 are integrally formed on the surface of the elastic pad 16. The plurality of elastic protrusions 17 are arranged on the elastic pad 16 at intervals in sequence to effectively reduce the impact force of the collision, thereby reducing component damage or noise caused by the collision, protecting the connecting piece 5 and the bottom wall of the pressure chamber 2, helping to extend the service life and improve the reliability of the equipment.
[0036] Reference Figure 2 and Figure 3 A buffer assembly 10 is installed in the pressure chamber 2. The number of buffer assemblies 10 is two groups. The two groups of buffer assemblies 10 are symmetrically installed in the pressure chamber 2. Each group of buffer assemblies 10 includes a buffer seat 101, an elastic sheet 102 and an adjusting member 103. The adjusting member 103 includes a fixing sheet 1031 and a fixing screw 1032. The fixing sheet 1031 is installed and fixed on the top wall of the pressure chamber 2. A slide groove 18 is provided on the fixing sheet 1031. A bending portion 13 is integrally formed at the end of the elastic sheet 102. The bending portion 13 is slidably connected in the slide groove 18. The fixing screw 1032 passes through the fixing sheet 1031 and is tightened on the bending portion 13. The position of the elastic sheet 102 can be accurately adjusted according to actual needs, so that the pressure switch can adapt to different working environments and pressure change ranges, thereby improving its adaptability and flexibility.
[0037] Reference Figure 2 and Figure 3 , the elastic sheet 102 is arranged toward the connecting sheet 5, the buffer seat 101 is installed on the connecting sheet 5, the elastic sheet 102 cooperates with the buffer seat 101, the end of the elastic sheet 102 close to the connecting sheet 5 is integrally formed with an annular portion 11, and the top of the buffer seat 101 is provided with an annular groove 12, the annular portion 11 is adapted to the inner wall of the annular groove 12, and the elastic sheet 102 in this embodiment has a certain elasticity; when the top rod 3 is subjected to a large impact force, the buffer seat 101 will first contact the elastic sheet 102 above, the elastic sheet 102 has a certain elasticity and buffering capacity, can effectively absorb and disperse the impact force received by the top rod 3, reduce the direct impact on the contacts, the contact or separation action between the contacts will be smoother and softer, reducing the possibility of poor contact or damage caused by impact.
[0038] The implementation principle of a pressure switch structure in the embodiment of the present application is as follows: when the pressure switch is subjected to pressure changes, the external pressure acts on the pressure connector 4, and this force is transmitted to the push rod 3, pushing the push rod 3 to move in the pressure chamber 2. As the push rod 3 moves, the damping spring 91 is compressed, and the connecting piece 5 and the moving contact point 6 thereon also move accordingly, and the distance between the moving contact point 6 and the static contact point 7 gradually changes, preparing for a contact action;
[0039] When the pressure connector 4 no longer transmits force to the push rod 3, the reset assembly 9 is immediately started and plays its role. At this time, due to the interruption of the force of the pressure connector 4, the push rod 3 is no longer affected by the external pressure and begins to move toward its initial position. The damping spring 91 sleeved on the push rod 3 begins to play a role. The damping spring 91 begins to gradually release the potential energy stored by the pressure before. This potential energy is converted into kinetic energy for the retraction of the push rod 3, helping the push rod 3 to return to its initial position smoothly and quickly; the stability and durability of the switch are greatly improved by the settings of the buffer seat 101, the elastic sheet 102, the adjustment member 103, etc. The elastic sheet 102 can effectively absorb and disperse these impact forces with its excellent elasticity and buffering capacity, thereby reducing the excessive direct impact on the contacts, significantly reducing the possibility of poor contact or damage caused by impact, and extending the service life of the contacts.
[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A pressure switch structure, characterized in that: The invention comprises a shell (1), wherein a pressure chamber (2) is arranged inside the shell (1), a push rod (3) is movably installed in the pressure chamber (2), a pressure joint (4) for driving the push rod (3) is arranged at the end of the push rod (3), a connecting piece (5) is also arranged on the push rod (3), two moving contact points (6) are symmetrically arranged on the connecting piece (5), two static contact points (7) are arranged in the pressure chamber (2), the two static contact points (7) respectively correspond to the two moving contact points (6), each static contact point (7) is respectively provided with a wiring piece (8), and the push rod (3) A reset assembly (9) for resetting is arranged on the pressure chamber (2); a buffer assembly (10) is arranged in the pressure chamber (2); the buffer assembly (10) comprises a buffer seat (101) and an elastic sheet (102); the buffer seat (101) is connected to the connecting sheet (5); the elastic sheet (102) is connected in the pressure chamber (2); the elastic sheet (102) is arranged above the buffer seat (101); the elastic sheet (102) cooperates with the buffer seat (101); the buffer assembly (10) further comprises an adjusting member (103) for adjusting the extension length of the elastic sheet (102).
2. A pressure switch structure according to claim 1, characterized in that: An annular portion (11) is provided at one end of the elastic sheet (102) close to the connecting sheet (5), and an annular groove (12) adapted to fit the annular portion (11) is provided at the top of the buffer seat (101).
3. A pressure switch structure according to claim 2, characterized in that: The adjusting member (103) comprises a fixing plate (1031) and a fixing screw (1032); the fixing plate (1031) is connected to the pressure chamber (2); a slide groove (18) is provided on the fixing plate (1031); a bending portion (13) is provided at the end of the elastic plate (102); the bending portion (13) is slidably connected to the slide groove (18); and the fixing screw (1032) passes through the fixing plate (1031) and is tightened on the bending portion (13).
4. A pressure switch structure according to claim 1, characterized in that: The reset assembly (9) comprises a damping spring (91) and a spring seat (92), wherein the spring seat (92) is connected to the pressure chamber (2), the spring seat (92) is arranged on the top of the push rod (3), the damping spring (91) is sleeved on the push rod (3), one end of the damping spring (91) is connected to the spring seat (92), and the other end of the damping spring (91) is connected to the outer wall of the push rod (3).
5. A pressure switch structure according to claim 4, characterized in that: A positioning ring (14) for fixing the position of the spring is arranged on the outer wall of the push rod (3), and the connecting piece (5) is sleeved on the positioning ring (14).
6. A pressure switch structure according to claim 5, characterized in that: A positioning step (15) is provided on the outer wall of the positioning ring (14), the positioning step (15) is provided along the circumferential direction of the positioning ring (14), and the connecting piece (5) is arranged on the positioning step (15).
7. A pressure switch structure according to claim 1, characterized in that: An elastic pad (16) is provided in the pressure chamber (2), and the elastic pad (16) is arranged at one end of the connecting piece (5) away from the moving contact point (6).
8. A pressure switch structure according to claim 7, characterized in that: The upper surface of the elastic pad (16) is provided with a plurality of elastic protrusions (17), and the plurality of elastic protrusions (17) are arranged on the elastic pad (16) at intervals.