Vertical float switch sealing structure

Abstract

The utility model discloses a vertical floating ball switch sealing structure which comprises a floating ball suspender which is arranged in a shell in a reciprocating moving and penetrating mode, a sealing cylinder sleeve which is connected with the floating ball suspender in a sealing mode is installed at the position of an opening structure of the bottom of the shell, and the sealing cylinder sleeve is provided with a first sealing portion which surrounds the opening structure and is fixed to the bottom of the shell in a sealing mode. By the adoption of the technical scheme, sealing connection of the floating ball hanging rod is achieved through the sealing cylinder sleeve at the hole position, the structure is simple, installation is convenient, the sealing cylinder sleeve can be stressed to elastically stretch out and draw back to deform when the floating ball hanging rod reciprocates, normal movement of the floating ball hanging rod cannot be affected, and the sealing cylinder sleeve can be used for sealing the floating ball hanging rod. Therefore, the sealing performance of the product is improved, the situation that liquid enters the switch to damage components and circuits when the product is matched with a water pump for use is avoided, and the safety and the reliability of the product in use are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level controllers, in particular to a vertical float switch sealing structure. Background Art

[0002] Vertical float switches automatically start and stop water pumps by detecting liquid levels. They rise and fall according to the water level, controlling the internal switch's action and outputting signals to control pumps or other electrical components. Due to their simple structure, reliable output, and low cost, float switches are widely used in water treatment, clean water tanks, sewage tanks, and liquid chemical raw materials, providing significant benefits to the water supply and drainage, sewage treatment, and chemical industries.

[0003] The existing vertical float switch includes a housing, a trigger switch, a lever, a float and a suspension rod. When the float rises or falls, it drives the lever to swing back and forth. The lever drives the on and off operation of the trigger switch through a connecting rod mechanism. Since the float switch is used in conjunction with a water pump, it is easy for liquid to enter the switch and damage the switch components and circuits. In order to ensure the sealing of the internal environment of the existing float switch, a common practice is to perform sealing treatment at the lever position, that is, to set a sealing sleeve on the lever, which is in sealing contact with the housing. However, the reciprocating swing of the lever causes a large degree of extrusion and wear on the sealing sleeve, shortening the service life of the sealing sleeve and affecting the sealing performance of the product. In addition, the installation process of the sealing sleeve in the housing is relatively complicated. Utility Model Content

[0004] Therefore, the purpose of the present invention is to overcome the problems existing in the prior art, thereby providing a vertical float switch sealing structure that realizes a sealed connection to the floating boom, has a simple structure, is easy to install, improves the product sealing performance and is safe to use.

[0005] In order to solve the above problems, the utility model provides a vertical float switch sealing structure, including a shell and a float rod that reciprocates and passes through the shell and is connected to the lever. The bottom of the shell is provided with an opening structure for the float rod to pass through. The shell is equipped with a sealing sleeve at the opening structure for sealingly connecting the float rod. The sealing sleeve has a first sealing portion that is sealed and fixed around the opening structure at the bottom of the shell, and a second sealing portion that is sealed and covered on the float rod. The float rod passes through the sealing sleeve to connect the lever and the float. The sealing sleeve can elastically expand and contract when subjected to force when the float rod moves back and forth.

[0006] As a preferred solution, the first sealing portion includes an annular end portion provided at one end of the sealing sleeve, the annular end portion is fitted around the opening structure and connected to the bottom of the shell, and is tightly fixed to the bottom of the shell by a fixing sleeve.

[0007] As a preferred solution, an annular sealing groove is provided at the bottom of the shell around the open hole structure, and a first sealing protrusion is provided on the annular end portion to match and insert into the annular sealing groove.

[0008] As a preferred solution, the fixing sleeve is arranged on the outside of the sealing sleeve, one end of the fixing sleeve is provided with an annular boss that fits and presses against the annular end, and the fixing sleeve and the shell are fixed by ultrasonic welding.

[0009] As a preferred solution, a positioning structure is provided between the fixing sleeve and the shell, and the positioning structure includes a positioning groove provided at the bottom of the shell, and a positioning protrusion provided at one end of the fixing sleeve and inserted into the positioning groove.

[0010] As a preferred solution, the second sealing portion includes a rod sleeve portion extending axially along the sealing sleeve and arranged at the other end of the sealing sleeve. The rod sleeve portion is adapted to be matched with the float boom and is sealed and fixed to the float boom through a connecting structure.

[0011] As a preferred solution, a plurality of second sealing protrusions in a ring shape are provided at intervals on the inner wall of the rod sleeve portion, and the second sealing protrusions are in sealing contact with the float boom.

[0012] As a preferred solution, the connecting structure is a crimping ring crimped onto the rod sleeve, or the connecting structure is a lock buckle locked onto the rod sleeve; or the connecting structure is a rubber-coated structure wrapped between the rod sleeve and the float boom.

[0013] As a preferred solution, the sealing sleeve and the float boom are extended in the same direction, and the sealing sleeve includes a corrugated sleeve portion extending between the first sealing portion and the second sealing portion, and the corrugated sleeve portion can be axially telescopically deformed when the sealing sleeve is subjected to force.

[0014] As a preferred solution, a trigger switch is provided in the shell, the lever is swingably set on the shell and connected to the trigger switch through a connecting rod mechanism, the shell includes an upper shell and a shell seat, the sealing sleeve and the fixing sleeve are arranged at the bottom of the shell seat, and the upper shell and the shell seat are fixed by ultrasonic welding.

[0015] Compared with the existing technology, the technical solution of this utility model has the following advantages:

[0016] 1. In the sealing structure of the vertical float switch provided by the utility model, the float rod is inserted into the shell and connected with the lever through the opening structure, and the sealing sleeve is installed at the opening structure and sealed with the float rod. Specifically, the first sealing part of the sealing sleeve is sealed and fixed around the opening structure at the bottom of the shell, and the second sealing part is covered and fixed on the float rod. In this way, the sealing sleeve and the float rod are sealed and connected, and the opening structure position is sealed and surrounded at the same time. The advantage of adopting this technical solution is that the sealing connection of the float rod is achieved by the sealing sleeve at the opening position at the bottom of the shell. The structure is simple and the installation is convenient. According to the elastic deformation characteristic of the sealing sleeve, the float rod will drive the sealing sleeve to elastically expand and contract along the axial direction when it moves back and forth. This will not affect the normal movement of the float rod and ensure the sealing of the connection between the two, thereby improving the sealing performance of the product, avoiding the situation where liquid enters the switch and causes damage to components and circuits when the product is used with a matching water pump, and improving the safety and reliability of the product.

[0017] 2. In the vertical float switch sealing structure provided by the utility model, the first sealing part includes an annular end portion arranged at one end of the sealing sleeve and a first sealing protrusion arranged on the annular end portion. The annular end portion is pressed against the bottom of the shell through the fixing sleeve, and the first sealing protrusion is squeezed and inserted into the annular sealing groove at the bottom of the shell. Such installation ensures the sealing of the connection between the sealing sleeve and the shell, thereby sealing and surrounding the open hole structure position, with good sealing effect, and the fixing sleeve and the bottom of the shell are fixed by ultrasonic welding, which can achieve seamless connection, high fusion strength and good installation stability.

[0018] 3. In the vertical float switch sealing structure provided by the present invention, the second sealing part includes a rod sleeve part arranged at the other end of the sealing sleeve, and a plurality of second sealing protrusions spaced apart on the inner wall of the rod sleeve part. Such a rod sleeve part is wrapped and fixed on the float suspension rod, and is in close contact with the float suspension rod through a plurality of second sealing protrusions. In this way, the rod sleeve part and the float suspension rod can be tightly combined to form multiple sealing contact surfaces, thereby playing a role of multiple sealing connections, thereby realizing the sealing of the connection between the sealing sleeve and the float suspension rod, and preventing water from invading the sealing sleeve along the float suspension rod.

[0019] 4. In the vertical float switch sealing structure provided by the utility model, the rod sleeve part of the sealing sleeve is crimped and fixed on the float suspension rod by a crimping ring, and the installation tightness is good, thereby realizing a sealed and fixed connection between the sealing sleeve and the float suspension rod, improving the tensile performance between the sealing sleeve and the float suspension rod, having excellent waterproof effect, good structural stability, easy installation, and improving the service life and protection level of the product.

[0020] 5. In the vertical float switch sealing structure provided by the utility model, the sealing sleeve includes a corrugated sleeve portion extending and connected between the first sealing portion and the second sealing portion. The corrugated sleeve portion provides a flexible connection between the rod sleeve portion and the annular end portion, which can withstand pressure, absorb impact, and play an axial displacement compensation and buffering role. Since the two ends of the sealing sleeve are fixedly connected to the shell and the float boom respectively, the sealing sleeve will undergo axial expansion and contraction deformation when the float boom moves up and down, mainly through the axial expansion and contraction deformation of the corrugated sleeve to meet the displacement requirements of the float boom. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the specific implementation or the description of the prior art.

[0022] Figure 1 This is a schematic cross-sectional view of the sealing structure of the vertical float switch of the present utility model;

[0023] Figure 2 for Figure 1 The schematic diagram of the partial enlarged structure of the vertical float switch sealing structure shown;

[0024] Figure 3 This is a structural diagram of the sealing sleeve of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the fixing sleeve of the present utility model.

[0026] Explanation of the accompanying drawings: 1. Shell; 11. Upper shell; 12. Shell seat; 2. Push rod; 3. Float hanger; 4. Opening structure; 5. Sealing sleeve; 51. First sealing part; 511. Annular end; 512. First sealing protrusion; 52. Second sealing part; 521. Rod sleeve; 522. Second sealing protrusion; 53. Corrugated sleeve; 6. Fixing sleeve; 61. Annular boss; 62. Positioning protrusion; 7. Connecting structure; 8. Connecting rod mechanism; 9. Trigger switch. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Example

[0032] The present embodiment will be described in detail below with reference to the accompanying drawings:

[0033] The vertical float switch provided by the utility model includes a trigger switch 9, a lever 2, a connecting rod mechanism 8 and a float assembly arranged on a housing 1. The float assembly includes a float suspension rod 3 and a float arranged on the float suspension rod 3. The lever 2 can be swingably arranged on the housing 1. The connecting rod mechanism 8 is connected between the lever 2 and the trigger switch 9. In order to ensure the sealing performance of the product, this embodiment provides Figure 1-4 The vertical float switch sealing structure shown includes a shell 1 and a float rod 3 that reciprocates and is arranged in the shell 1 and is connected to the lever 2. The bottom of the shell 1 is provided with an opening structure 4 for the float rod 3 to pass through. The bottom of the shell 1 is provided with a sealing sleeve 5 that is sealed and connected to the float rod 3 at the opening structure 4. The sealing sleeve 5 has a first sealing portion 51 that is sealed and fixed to the bottom of the shell around the opening structure 4, and a second sealing portion 52 that is sealed and covered and fixed on the float rod 3. The float rod 3 passes through the sealing sleeve 5 to connect the lever 2 and the float. The sealing sleeve 5 can elastically expand and contract when the float rod 3 moves back and forth.

[0034] In the above embodiment, the float rod 3 is inserted into the shell through the opening structure 4 and connected with the lever 2, and the sealing sleeve 5 is installed at the opening structure 4 and sealed with the float rod 3. Specifically, the first sealing portion 51 of the sealing sleeve 5 is sealed and fixed around the opening structure 4 at the bottom of the shell, and the second sealing portion 52 is covered and fixed on the float rod 3. In this way, the sealing sleeve 5 is sealed and connected to the float rod 3, and the opening structure 4 is sealed and surrounded at the same time. The advantage of adopting this technical solution is that the sealing sleeve 5 is used to achieve a sealed connection with the float rod 3 at the opening position at the bottom of the shell. The structure is simple and the installation is convenient. According to the elastic deformation characteristic of the sealing sleeve 5, the float rod 3 will drive the sealing sleeve 5 to elastically expand and contract along the axial direction when it moves back and forth. This will not affect the normal movement of the float rod, but also ensure the sealing of the connection between the two, thereby improving the sealing performance of the product, avoiding the situation where liquid enters the switch when the product is used with a matching water pump, causing damage to components and circuits, and improving the safety and reliability of the product.

[0035] The following combination Figure 1-3 The specific configuration of the first sealing portion is described in detail:

[0036] An annular sealing groove is provided around the open hole structure 4 at the bottom of the shell 1. The first sealing portion 51 includes an annular end portion 511 provided at one end of the sealing sleeve 5, and a first sealing protrusion 512 provided on the annular end portion 511 and matched and inserted into the annular sealing groove. The annular end portion 511 is fitted around the open hole structure 4 and connected to the bottom of the shell. During installation, the annular end portion 511 of the sealing sleeve 5 is pressed against the bottom of the shell through the fixing sleeve 6, and the first sealing protrusion 512 is squeezed and inserted into the annular sealing groove at the bottom of the shell 1. Such installation ensures the sealing of the connection between the sealing sleeve 5 and the shell 1, thereby sealing and surrounding the open hole structure 4 position, with good sealing effect, and the fixing sleeve and the bottom of the shell are fixed by ultrasonic welding, which can achieve seamless connection, high fusion strength and good installation stability.

[0037] The fixing sleeve 6 is sleeved on the outside of the sealing sleeve 5. Figure 2 and Figure 4One end of the fixing sleeve 6 is provided with an annular boss 61 that cooperates and presses against the annular end portion 511. The annular boss 61 acts as a limit pressure on the annular end portion 511, so that the annular end portion 511 is pressed between the bottom of the shell and the annular boss 61. In order to improve the accuracy and reliability of the installation of the fixing sleeve 6, a positioning structure is provided between the fixing sleeve 6 and the shell 1. The positioning structure includes a positioning groove provided at the bottom of the shell 1, and a positioning protrusion 62 provided at one end of the fixing sleeve 6 and inserted into the positioning groove. The positioning protrusion 62 cooperates with the positioning groove to achieve the positioning installation of the fixing sleeve 6 at the bottom of the shell. In the positioned state, the fixing sleeve 6 presses against the annular end portion 511 of the sealing sleeve 5, and then ultrasonic welding can be used. This makes installation convenient and quick, and improves installation efficiency.

[0038] The following combination Figure 1-3 The specific configuration of the second sealing portion is described in detail:

[0039] The second sealing portion 52 includes a rod sleeve portion 521 extending axially along the sealing sleeve 5 and arranged at the other end of the sealing sleeve 5, and a plurality of second sealing protrusions 522 in a ring shape are arranged at intervals on the inner wall of the rod sleeve 521. The rod sleeve portion 521 is cylindrical in shape and is adapted to be fitted on the float rod 3, and is sealed and fixed to the float rod 3 through the connecting structure 7. The rod sleeve portion 521 of this structural arrangement is covered and fixed on the float rod 3, and is in close contact with the float rod 3 through the plurality of second sealing protrusions 522. In this way, the rod sleeve portion 521 can be tightly combined with the float rod 3 to form multiple sealing contact surfaces, thereby playing a role of multiple sealing connections, thereby realizing the sealing of the connection between the sealing sleeve 5 and the float rod 3, and preventing liquid from invading the sealing sleeve 5 along the float rod 3.

[0040] As a preferred embodiment, the connecting structure 7 is preferably a crimping ring crimped onto the rod sleeve 521. The crimping ring firmly presses the rod sleeve 521 onto the float rod 3, providing good installation tightness, thereby achieving a sealed and fixed connection between the sealing sleeve 5 and the float rod 3, and improving the tensile strength between the sealing sleeve 5 and the float rod 3. This provides excellent waterproofing, good structural stability, and convenient installation, thereby increasing the product's service life and protection level. Obviously, the connecting structure 7 can also be configured in other different ways. For example, the connecting structure is a lock that locks onto the rod sleeve 521, using the lock to fasten and lock the rod sleeve 521 onto the float rod 3; or the connecting structure is a rubber-coated structure that covers between the rod sleeve 521 and the float rod 3, achieving a sealed and fixed connection between the rod sleeve 521 and the float rod 3 through a rubber-coated process. Those skilled in the art will be able to choose the specific structure of the connecting structure based on the above description, and other equivalent embodiments will not be described in detail here.

[0041] In this embodiment, the sealing sleeve 5 and the float boom 3 are extended in the same direction. The sealing sleeve 5 is made of rubber or silicone material. Figure 2 The sealing sleeve 5 includes a bellows portion 53 extending between the first sealing portion 51 and the second sealing portion 52. The bellows portion 53 is capable of axially expanding and contracting when the sealing sleeve 5 is subjected to force. In this structural arrangement, the bellows portion 53 is sleeved on the outside of the float rod 3 and serves to compensate for axial displacement. Since the two ends of the sealing sleeve 5 are fixedly connected to the bottom of the housing and the float rod 3, respectively, the sealing sleeve 5 will undergo axial expansion and contraction deformation when the float rod 3 moves up and down. This is mainly achieved by the axial expansion and contraction of the bellows portion 53 to meet the displacement requirements of the float rod 3. This ensures a sealed connection between the sealing sleeve 5 and the float rod 3 while not affecting the reciprocating movement of the float rod 3 under the action of buoyancy.

[0042] like Figure 1 As shown, a trigger switch 9 is provided in the shell 1, the lever 2 is swingably set on the shell 1 and is connected to the trigger switch 9 through a connecting rod mechanism 8, and the connecting rod mechanism 8 transmits motion and force between the lever 2 and the trigger switch 9. When the float rises or falls, the float suspension rod 3 drives the lever 2 to swing, and the lever 2 drives the trigger switch 9 through the connecting rod mechanism 8 to realize the on-off operation. The shell 1 includes an upper shell 11 and a shell seat 12, and the sealing sleeve 5 and the fixing sleeve 6 are arranged at the bottom of the shell seat 12. The upper shell 11 and the shell seat 12 are fixed by ultrasonic welding, thereby ensuring the sealing between the upper shell 11 and the shell seat 12.

[0043] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A vertical float switch sealing structure, comprising a housing (1) and a float suspension rod (3) reciprocatingly arranged in the housing (1) and connected to a lever (2), wherein an opening structure (4) is provided at the bottom of the housing (1) for the float suspension rod (3) to pass through, and characterized in that: The housing (1) is provided with a sealing sleeve (5) at the opening structure (4) for sealingly connecting the float rod (3). The sealing sleeve (5) comprises a first sealing portion (51) which is sealed and fixed to the bottom of the housing (1) around the opening structure (4), and a second sealing portion (52) which is sealed and fixed to the float rod (3). The float rod (3) passes through the sealing sleeve (5) to connect the lever and the float. The sealing sleeve (5) is elastically deformable under the force applied when the float rod (3) moves back and forth.

2. The vertical float switch sealing structure according to claim 1, characterized in that: The first sealing portion (51) comprises an annular end portion (511) arranged at one end of the sealing sleeve (5); the annular end portion (511) surrounds the opening structure (4) and is fittedly connected to the bottom of the housing (1); and the annular end portion (511) is fixed to the bottom of the housing (1) via a fixing sleeve (6).

3. The vertical float switch sealing structure according to claim 2, characterized in that: An annular sealing groove is provided at the bottom of the housing (1) around the open hole structure (4), and a first sealing protrusion (512) is provided on the annular end (511) and is matched and inserted into the annular sealing groove.

4. The vertical float switch sealing structure according to claim 2, characterized in that: The fixing sleeve (6) is sleeved on the outside of the sealing sleeve (5), and the fixing sleeve (6) is provided with an annular boss (61) that fits and presses against the annular end (511). The fixing sleeve (6) and the housing (1) are fixed by ultrasonic welding.

5. The vertical float switch sealing structure according to claim 4, characterized in that: A positioning structure is provided between the fixing sleeve (6) and the housing (1), the positioning structure comprising a positioning groove provided at the bottom of the housing (1), and a positioning protrusion (62) provided at one end of the fixing sleeve (6) and inserted into the positioning groove.

6. The vertical float switch sealing structure according to claim 1, characterized in that: The second sealing portion (52) comprises a rod sleeve portion (521) extending along the axial direction of the sealing sleeve (5) and arranged at the other end of the sealing sleeve (5); the rod sleeve portion (521) is adapted to be matched with the float suspension rod (3) and is sealed and fixed to the float suspension rod (3) through a connecting structure (7).

7. The vertical float switch sealing structure according to claim 6, characterized in that: A plurality of second sealing protrusions (522) in an annular shape are provided at intervals on the inner wall of the rod sleeve portion (521), and the second sealing protrusions (522) are in sealing contact with the floating ball suspension rod (3).

8. The vertical float switch sealing structure according to claim 6, characterized in that: The connecting structure (7) is a crimping ring crimped onto the rod sleeve (521), or the connecting structure (7) is a lock buckle locked onto the rod sleeve (521); or the connecting structure (7) is a rubber-coated structure covering between the rod sleeve (521) and the float boom (3).

9. The vertical float switch sealing structure according to any one of claims 1 to 8, characterized in that: The sealing sleeve (5) and the float boom (3) are extended in the same direction, and the sealing sleeve (5) includes a corrugated sleeve portion (53) extending and connected between the first sealing portion (51) and the second sealing portion (52). The corrugated sleeve portion (53) can be axially telescopically deformed when the sealing sleeve (5) is subjected to force.

10. The vertical float switch sealing structure according to claim 1, characterized in that: A trigger switch (9) is provided in the housing (1); the shift lever (2) is swingably provided on the housing (1) and is connected to the trigger switch (9) via a connecting rod mechanism (8); the housing (1) comprises an upper shell (11) and a housing seat (12); the sealing sleeve (5) and the fixing sleeve (6) are provided at the bottom of the housing seat (12); and the upper shell (11) and the housing seat (12) are fixed by ultrasonic welding.

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