Straight stroke actuator with sealing structure

Abstract

The utility model relates to the technical field of straight stroke actuators, in particular to a straight stroke actuator with a sealing structure, which comprises a base, a fixing bolt and a shell, a first flange is fixedly mounted on the periphery of the base, a second flange is fixedly mounted on the periphery of the shell, and the first flange and the second flange are in corresponding contact with each other. The fixing bolt penetrates through the first flange and the second flange, a groove is formed in the upper surface of the first flange, a first sealing ring is fixedly installed at the lower end of the second flange and located in the groove, a reserved groove is formed in the lower surface of the second flange, and multiple sets of tempered glass are fixedly installed in the reserved groove. A second sealing ring is fixedly installed on the side wall in the shell and makes contact with the side wall of the base. The sealing performance between the first flange and the second flange can be improved by matching the first sealing ring with the groove, the sealing performance between the shell and the base can be improved by the second sealing ring, and the sealing effect of shell installation is effectively improved by forming two seals.

Description

Technical Field

[0001] This utility model relates to the field of linear actuator technology, and in particular to a linear actuator with a sealed structure. Background Technology

[0002] Linear actuators are automated devices that output linear motion. They are widely used in fluid control in industries such as chemical, power, and metallurgy. They can control the valve opening by pushing the valve stem with linear motion. Some installation environments may be humid or dusty, so the sealing effect of the actuator housing is crucial. It can isolate the various devices inside the housing from the outside environment and ensure the stable operation of the actuator.

[0003] Currently, actuator housings typically use a flange mounting method with a single sealing ring. After long-term use, the sealing ring may age, leading to a decrease in the sealing performance at the connection between the housing and the base. This is difficult to detect and can affect the normal operation of various devices inside the housing.

[0004] Therefore, the current actuator housing typically uses a flange mounting method with a single sealing ring. After long-term use, the sealing ring may age, leading to a decrease in the sealing performance at the connection between the housing and the base, which is difficult to detect and thus affects the normal operation of various equipment inside the housing. A linear actuator with a sealing structure can be designed. By setting rubber ring sealing structures at both the connecting flange and the side wall where the housing contacts the base, a double seal ensures the sealing effect. An observation structure is set between the two sets of sealing rings so that when the outer sealing ring ages and fails, maintenance personnel can easily detect the problem and perform maintenance in a timely manner. Utility Model Content

[0005] To overcome the problem that current actuator housings typically use a flange mounting method with a single sealing ring, the sealing ring may age after long-term use, leading to a decrease in the sealing performance at the connection between the housing and the base, which is difficult to detect and thus affects the normal operation of various devices inside the housing.

[0006] The technical solution of this utility model is as follows: a linear actuator with a sealed structure includes a base, a housing, a drive assembly, an output shaft, fixing bolts, and brackets. The drive assembly is located at the upper end of the base, and the housing is located at the upper end of the base. The drive assembly is located inside the housing. The output shaft passes through the base. A first flange is fixedly installed on the outer periphery of the base, and a second flange is fixedly installed on the outer periphery of the housing. The first flange and the second flange are in corresponding contact with each other. Multiple sets of fixing bolts are provided, and the fixing bolts pass through the first flange and the second flange. A groove is opened on the upper surface of the first flange. A first sealing ring is fixedly installed at the lower end of the second flange. The first sealing ring is located inside the groove. A reserved groove is opened on the lower surface of the second flange. Multiple sets of tempered glass are fixedly installed inside the reserved groove. A second sealing ring is fixedly installed on the inner side wall of the housing. The second sealing ring contacts the side wall of the base. Two sets of brackets are fixedly installed at the lower end of the base.

[0007] Preferably, the overall actuator can be mounted on an external device by setting a bracket, the output shaft can be driven to perform linear motion by setting a drive component, the internal drive component can be protected by setting a housing, the first flange and the second flange can be fixed by setting bolts, thereby fixing the housing to the upper end of the base, the first sealing ring inserted into the groove can improve the sealing between the first flange and the second flange, and the second sealing ring can improve the sealing between the housing and the base, thus forming a double seal to effectively improve the sealing effect of the housing installation, the reserved groove can guide and temporarily store leaked water vapor when the first sealing ring ages and fails, reducing the pressure on the second sealing ring, and the tempered glass can facilitate maintenance personnel to observe the situation in the reserved groove. If a leak occurs, the stains or water stains in the reserved groove can be observed through the tempered glass, allowing maintenance personnel to detect the leak in time and perform maintenance.

[0008] Preferably, both the first sealing ring and the groove have a V-shaped cross-section, and the height of the first sealing ring is greater than the depth of the groove.

[0009] Preferably, a locking nut is provided around the fixing bolt, and the locking nut is threadedly connected to the fixing bolt. The locking nut is located at the lower end of the first flange. Four anti-slip pads are provided around the fixing bolt, and the four anti-slip pads are arranged in pairs. One pair is located between the fixing bolt and the second flange, and the other pair is located between the locking nut and the first flange.

[0010] Preferably, the drive assembly includes a power source and a control unit. The power source is fixedly installed on the upper end of the base, and the control unit is fixedly installed on the upper end of the base. The control unit is located on one side of the power source, and the output end of the power source is fixedly connected to the output shaft.

[0011] Preferably, a mechanical seal is fixedly installed at the lower end of the base, the mechanical seal is located on the periphery of the output shaft, and an opening and closing nut is fixedly installed at the lower end of the output shaft.

[0012] Preferably, a slide rail is fixedly installed on one side of a set of brackets, and a guide block is fixedly installed on one side of the opening and closing nut, with the guide block slidably connected to the slide rail.

[0013] Preferably, a travel scale is fixedly installed on one side of another set of brackets, and a pointer is fixedly installed on the other side of the opening and closing nut.

[0014] The beneficial effects of this utility model are:

[0015] 1. By inserting the first sealing ring into the groove, a seal can be formed between the first flange and the second flange. Through the design of the V-shaped cross-section of the first sealing ring and the groove, the height of the first sealing ring is slightly greater than the depth of the groove. This allows the first sealing ring to deform slightly when the first flange and the second flange are connected, so that the first sealing ring fits the groove more tightly, thereby improving the sealing effect. The second sealing ring contacts the side wall of the base, which can improve the sealing between the shell and the base, thus forming two seals and effectively improving the sealing effect of the shell installation.

[0016] 2. If a leak occurs at the first sealing ring, the seal formed by the second sealing ring can prevent the leak from entering the interior of the casing. At this time, the leaked dust and liquid will first enter the interior of the reserved groove, thereby guiding and temporarily storing the leaked water vapor, reducing the pressure on the second sealing ring. The tempered glass allows maintenance personnel to easily observe the situation inside the reserved groove. If a leak occurs, there will be stains or water stains inside the reserved groove, which can be easily observed through the tempered glass, allowing maintenance personnel to detect the leak in time and carry out maintenance. Attached Figure Description

[0017] Figure 1 The diagram shown is a first three-dimensional structural schematic of the linear actuator with a sealed structure according to this utility model.

[0018] Figure 2 The diagram shown is a second three-dimensional structural schematic of the linear actuator with a sealed structure according to this utility model.

[0019] Figure 3 The diagram shown is a three-dimensional structural diagram of the upper end of the base of the linear actuator with a sealed structure according to this utility model.

[0020] Figure 4 The diagram shown is a three-dimensional structural schematic of the housing of the linear actuator with a sealed structure according to this utility model.

[0021] Figure 5The diagram shown is a three-dimensional cross-sectional view of the connection between the first flange and the second flange of the linear actuator with a sealing structure according to this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Base; 101. First flange; 102. Groove; 2. Outer shell; 201. Second flange; 202. First sealing ring; 203. Reserved groove; 204. Tempered glass; 205. Second sealing ring; 301. Fixing bolt; 302. Locking nut; 303. Anti-slip pad; 4. Output shaft; 401. Power source; 402. Control unit; 403. Mechanical seal; 404. Opening nut; 5. Bracket; 501. Guide block; 502. Slide rail; 503. Travel scale; 504. Pointer. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please see Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a linear actuator with a sealed structure, comprising a base 1, a housing 2, a drive assembly, an output shaft 4, fixing bolts 301, and a bracket 5. The drive assembly is disposed at the upper end of the base 1, and the housing 2 is disposed at the upper end of the base 1, with the drive assembly located inside the housing 2. The output shaft 4 passes through the base 1. A first flange 101 is fixedly installed on the periphery of the base 1, and a second flange 201 is fixedly installed on the periphery of the housing 2. The first flange 101 and the second flange 201 are in corresponding contact with each other. Multiple sets of fixing bolts 301 are provided. A fixing bolt 301 passes through the first flange 101 and the second flange 201. A groove 102 is formed on the upper surface of the first flange 101. A first sealing ring 202 is fixedly installed at the lower end of the second flange 201, and the first sealing ring 202 is located inside the groove 102. A reserved groove 203 is formed on the lower surface of the second flange 201. Multiple sets of tempered glass 204 are fixedly installed inside the reserved groove 203. A second sealing ring 205 is fixedly installed on the inner side wall of the outer shell 2. The second sealing ring 205 contacts the side wall of the base 1. Two sets of... Bracket 5: The overall actuator can be installed on an external device by setting bracket 5. The output shaft 4 can be driven to perform linear motion by setting drive assembly. The housing 2 can protect the internal drive assembly. The first flange 101 and the second flange 201 can be fixed together by setting bolts, thereby fixing the housing 2 to the upper end of the base 1. The sealing performance between the first flange 101 and the second flange 201 can be improved by setting the first sealing ring 202 to be inserted into the groove 102. The sealing performance between the housing 2 and the base 1 can be improved by setting the second sealing ring 205, thereby forming two seals and effectively improving the sealing effect of the housing 2 installation. The reserved groove 203 can guide and temporarily store leaked water vapor when the first sealing ring 202 ages and fails, reducing the pressure on the second sealing ring 205. The tempered glass 204 can facilitate maintenance personnel to observe the situation inside the reserved groove 203. If a leak occurs, there will be stains or water stains inside the reserved groove 203, which can be observed through the tempered glass 204, allowing maintenance personnel to detect the leak in time and perform maintenance.

[0025] Please see Figure 3 and Figure 5In this embodiment, both the sealing ring and the groove 102 have a V-shaped cross-section, and the depth of the first sealing ring 202 is greater than the height of the groove 102. The V-shaped cross-section design of the first sealing ring 202 and the groove 102 improves the sealing effect. The greater height of the first sealing ring 202 compared to the depth of the groove 102 allows for slight deformation of the first sealing ring 202 when the first flange 101 and the second flange 201 are connected, enabling a tighter fit between the first sealing ring 202 and the groove 102. A locking nut 302 is provided around the fixing bolt 301, threadedly connected to the fixing bolt 301. The locking nut 302 is located at the lower end of the first flange 101. Four anti-slip washers 303 are provided around the fixing bolt 301, arranged in pairs. One set of bolts is located between the fixing bolt 301 and the second flange 201, and the other set is located between the locking nut 302 and the first flange 101. The locking nut 302 can be used to lock the fixing bolt 301, providing greater pressure for the connection between the first flange 101 and the second flange 201. The anti-slip pad 303 can effectively prevent the locking nut 302 and the fixing bolt 301 from loosening. The drive assembly includes a power source 401 and a control unit 402. The power source 401 is fixedly installed on the upper end of the base 1, and the control unit 402 is fixedly installed on the upper end of the base 1. The control unit 402 is located on one side of the power source 401, and the output end of the power source 401 is fixedly connected to the output shaft 4. The power source 401 can provide power for the movement of the output shaft 4, and the control unit 402 can control the power source 401.

[0026] Please see Figure 1 and Figure 2 In this embodiment, a mechanical seal 403 is fixedly installed at the lower end of the base 1. The mechanical seal 403 is located around the output shaft 4, and a nut 404 is fixedly installed at the lower end of the output shaft 4. The nut 404 can be connected to the control component of an external valve, and the mechanical seal 403 can seal the connection between the output shaft 4 and the base 1 to prevent external moisture and dust from entering the interior of the housing 2 from the output shaft 4. A slide rail 502 is fixedly installed on one side of a set of brackets 5, and a slide rail 502 is fixedly installed on one side of the nut 404. A guide block 501 is installed, which is slidably connected to the slide rail 502. By setting the cooperation between the guide block 501 and the slide rail 502, the output shaft 4 can be guided and limited when it moves, so as to make it run stably and thus ensure the sealing effect of the mechanical seal 403. A stroke scale 503 is fixedly installed on one side of another bracket 5, and a pointer 504 is fixedly installed on the other side of the opening and closing nut 404. By setting the cooperation between the pointer 504 and the stroke scale 503, the stroke output by the output shaft 4 can be confirmed, which is convenient for installation and debugging.

[0027] During operation, the overall actuator can be installed in a suitable position on an external device using bracket 5. The opening and closing nut 404 can be connected to the drive component that needs to be driven. The control unit 402 controls the power source 401 to drive the output shaft 4 to perform linear output. The guide block 501 and slide rail 502 cooperate to guide and limit the output shaft 4 when it moves, so as to ensure stable operation and thus ensure the sealing effect of the mechanical seal 403. The pointer 504 and the stroke scale 503 cooperate to confirm the stroke output by the output shaft 4, which facilitates installation and debugging.

[0028] Bolts can be used to fix the first flange 101 and the second flange 201 together, thereby fixing the outer shell 2 to the upper end of the base 1. The locking nut 302 can lock the fixing bolt 301, providing greater pressure for the connection between the first flange 101 and the second flange 201. By setting the anti-slip pad 303, the locking nut 302 and the fixing bolt 301 can be effectively prevented from loosening.

[0029] After the outer shell 2 is fixed, the first sealing ring 202 will be inserted into the groove 102. The V-shaped cross-section design of the first sealing ring 202 and the groove 102, with the height of the first sealing ring 202 being greater than the depth of the groove 102, allows the first sealing ring 202 to slightly deform before entering the groove 102 when the first flange 101 and the second flange 201 are connected. This makes the first sealing ring 202 fit more tightly with the groove 102, thereby improving the sealing effect.

[0030] By using the second sealing ring 205 to contact the side wall of the base 1, the sealing between the outer shell 2 and the base 1 can be improved, thus forming two seals that effectively improve the sealing effect of the outer shell 2 installation. If a leak occurs at the first sealing ring 202, the seal formed by the second sealing ring 205 can prevent the leak from entering the interior of the outer shell 2. At this time, the leaked dust and liquid will first enter the interior of the reserved groove 203, thereby guiding and temporarily storing the leaked water vapor, etc., reducing the pressure of the second sealing ring 205. The tempered glass 204 allows maintenance personnel to easily observe the situation inside the reserved groove 203. If a leak occurs, there will be stains or water stains inside the reserved groove 203, which can be easily observed through the tempered glass 204, allowing maintenance personnel to detect the leak in time and carry out maintenance.

[0031] Through the above steps, the sealing performance between the first flange 101 and the second flange 201 can be improved by the first sealing ring 202 cooperating with the groove 102, and the sealing performance between the housing 2 and the base 1 can be improved by the second sealing ring 205. Thus, the double seal effectively improves the sealing effect of the housing 2 installation. The tempered glass 204 makes it convenient for maintenance personnel to observe, so that maintenance can be carried out in a timely manner. The leakage problem is solved by addressing the issue that the current actuator housing 2 usually adopts a flange installation method with a single sealing ring. After long-term use, the sealing ring may age, resulting in a decrease in the sealing performance at the connection between the housing 2 and the base 1, which is difficult to detect and thus affects the normal operation of various equipment inside the housing 2.

[0032] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A linear actuator with a sealed structure, comprising a base (1) and a housing (2), characterized in that: It also includes a drive assembly, an output shaft (4), fixing bolts (301), and a bracket (5). The drive assembly is located at the upper end of the base (1), and the outer shell (2) is located at the upper end of the base (1). The drive assembly is located inside the outer shell (2). The output shaft (4) passes through the base (1). A first flange (101) is fixedly installed on the outer periphery of the base (1), and a second flange (201) is fixedly installed on the outer periphery of the outer shell (2). The first flange (101) and the second flange (201) are in corresponding contact with each other. Multiple sets of fixing bolts (301) are provided, and the fixing bolts (301) pass through the first flange (101) and the second flange (201). Flange (201), the upper surface of the first flange (101) has a groove (102), the lower end of the second flange (201) is fixedly installed with a first sealing ring (202), the first sealing ring (202) is located inside the groove (102), the lower surface of the second flange (201) has a reserved groove (203), the reserved groove (203) is fixedly installed with multiple sets of tempered glass (204), the inner side wall of the outer shell (2) is fixedly installed with a second sealing ring (205), the second sealing ring (205) is in contact with the side wall of the base (1), and the lower end of the base (1) is fixedly installed with two sets of brackets (5).

2. The linear actuator with a sealed structure according to claim 1, characterized in that: Both the first sealing ring (202) and the groove (102) have V-shaped cross-sections, and the height of the first sealing ring (202) is greater than the depth of the groove (102).

3. The linear actuator with a sealed structure according to claim 1, characterized in that: A locking nut (302) is provided around the fixing bolt (301). The locking nut (302) is threadedly connected to the fixing bolt (301). The locking nut (302) is located at the lower end of the first flange (101). Four anti-slip pads (303) are provided around the fixing bolt (301). The four anti-slip pads (303) are arranged in pairs. One pair is located between the fixing bolt (301) and the second flange (201), and the other pair is located between the locking nut (302) and the first flange (101).

4. The linear actuator with a sealed structure according to claim 1, characterized in that: The drive assembly includes a power source (401) and a control unit (402). The power source (401) is fixedly installed on the upper end of the base (1), and the control unit (402) is fixedly installed on the upper end of the base (1). The control unit (402) is located on one side of the power source (401), and the output end of the power source (401) is fixedly connected to the output shaft (4).

5. The linear actuator with a sealed structure according to claim 1, characterized in that: A mechanical seal (403) is fixedly installed at the lower end of the base (1). The mechanical seal (403) is located on the periphery of the output shaft (4). A split nut (404) is fixedly installed at the lower end of the output shaft (4).

6. The linear actuator with a sealed structure according to claim 5, characterized in that: A slide rail (502) is fixedly installed on one side of a bracket (5), and a guide block (501) is fixedly installed on one side of the opening and closing nut (404). The guide block (501) is slidably connected to the slide rail (502).

7. The linear actuator with a sealed structure according to claim 5, characterized in that: A travel scale (503) is fixedly installed on one side of another set of brackets (5), and a pointer (504) is fixedly installed on the other side of the opening and closing nut (404).

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