CN221078971U - Protective type light guide column structure, electronic equipment and low-voltage metering detection equipment - Google Patents

Abstract

The utility model discloses a protective type light guide column structure, electronic equipment and low-voltage metering detection equipment. An electronic device includes the protective light guide column structure, and a low-voltage metering detection device includes the electronic device. So, through flange and external equipment's matching, protection type leaded light post structure can realize dustproof etc. protective effect, simultaneously, because protection type leaded light post structure accessible direct match the mounting panel is realized the installation with external equipment's mode, protection type leaded light post structure installation simplicity improves greatly.

Description

Protective type light guide column structure, electronic equipment and low-voltage metering detection equipment

Technical Field

The utility model relates to the field of light guide columns, in particular to a protective light guide column structure, electronic equipment and low-voltage metering detection equipment.

Background

The light guide column with the traditional structure is installed in an inward-outward mode, so that the light guide column has the problems of high operation difficulty and complex installation process. Meanwhile, after the light guide column structure with the traditional structure is installed, an installation gap is often formed between the light guide column structure and the installation main body, so that the service life and the effect of equipment provided with the light guide column are easily influenced by external factors. The utility model patent with publication number CN214274463U and publication date 2021-09-24 discloses a waterproof light guide column, wherein a fixing block and a back-off block for fixing the waterproof light guide column are arranged on the waterproof light guide column, the fixing block and the back-off block are sleeved with the same elastic rubber ring, the elastic rubber ring can fill an installation hole between the light guide column and installation equipment after the light guide column main body is installed, the installation compactness of the light guide column is improved, and the light guide column can achieve the purposes of water resistance, dust resistance and the like. The elastic rubber ring is positioned between the fixed block and the back-off block, a certain distance of deviation is arranged between the fixed block and the back-off block, a part for providing support is not arranged on the elastic rubber ring between the fixed block and the back-off block, uncontrollable deformation of the rubber ring is easy to occur, and the waterproof and dustproof effects of the waterproof light guide column structure are low.

Disclosure of utility model

The utility model aims to overcome the defects that a light guide column structure is difficult to install and the connection tightness of the light guide column structure is low in the prior art, and provides a protective light guide column structure, electronic equipment and low-voltage metering detection equipment. The flange capable of realizing the plug-in connection is arranged on the mounting plate, and meanwhile, the flange and the plurality of light guide columns are arranged on the mounting plate, and in the mounting process of the protective light guide column structure, operators can directly clamp external equipment through the flange to realize the tight connection between the mounting plate and the outside, so that the use effect and the service life of the protective light guide column structure are ensured due to the arrangement of the flange.

The aim of the utility model is mainly realized by the following technical scheme:

the utility model provides a protection type light guide column structure, includes the mounting panel and is located a plurality of light guide column on the mounting panel, be equipped with the flange that can be used for pegging graft on the mounting panel, the light guide column is all fixed on being equipped with on the mounting panel side of flange to, the hookup location of light guide column on the mounting panel is located in the annular region that the flange encloses.

At present, for the light guide column structure, the light guide column is used as a structure with light transmission property, in order to ensure good performance of the light guide column in the use process, operators need to avoid the influence of external environmental factors on the performance of the light guide column as much as possible in the assembly process of the light guide column. In order to ensure the tightness of connection after installation, the traditional light guide column structure is often installed in an inside-out mode, and the complex installation process is unfavorable for the use of the light guide column structure. For promoting the installation convenience of leaded light post structure and realizing at dustproof, the waterproof purpose of its installation casing position, including leaded light post structure and casing joint in the prior art be connected to from outside-in embedding completion installation's scheme, unanimous with traditional leaded light post structure, also adopt seal assembly in this realization mode, but such assembly mode is because can't provide good support, the constraint effect such as seal assembly such as rubber circle, uncontrollable deformation is taken place easily to the rubber circle, the installation compactness (mainly influence the leakproofness) of leaded light post structure can't obtain guaranteeing.

In the embodiment of the application, the protective light guide column structure comprises a mounting plate and a plurality of light guide columns, wherein the light guide columns are all arranged on the mounting plate, and in order to meet the compactness of the connection between the mounting plate and the outside, the influence of the outside factors on the service performance of the light guide columns is avoided, the mounting plate is also provided with a flange, and the flange and the plurality of light guide columns are all positioned on the same side of the mounting plate. Therefore, the flange and the external equipment are inserted in the annular groove on the external equipment shell, the flexible material is arranged at the bottom side of the annular groove to serve as a sealing ring between the structure and the external equipment, if a rubber ring is adopted, the flange can extrude the flexible material on the external equipment to fill a connecting gap, and the protective light guide column structure can achieve a tight connecting effect with the external equipment. In the embodiment of the application, the following may be applied: in the process of inserting the flange into the external equipment, as the contact area between the flange and the external equipment is smaller than the contact area between the mounting plate and the external equipment, the smaller contact area can generate larger pressure, the protective light guide column structure is fixed on the external equipment by applying the same force, the flange can apply larger acting force to the flexible material in the inserting process, the flexible material can expand to a larger degree, and the protective light guide column structure can further improve the connection tightness with the external equipment. In addition, in the embodiment of the application, the protective type light guide column structure is installed from outside to inside, so that the installation flow of the protective type light guide column structure is simplified, the connection position of the flange and the external equipment can be adjusted by directly controlling the installation plate, and the plugging position of the flange can be more closely matched with the external equipment.

Further, the LED lamp further comprises a plurality of clamping pieces, wherein the clamping pieces and the light guide column are positioned on the same side of the mounting plate; one end of the clamping piece is fixed on the mounting plate, the clamping piece is of a rod-shaped structure and extends along the axial direction of the light guide column, and a clamping groove is formed in the other end of the clamping piece and can be connected with external equipment in a clamping mode.

In the embodiment of the application, in order to simplify the connection mode of the mounting plate and the outside and further reduce the connection gap between the mounting plate and the external equipment, the protective light guide column structure further comprises a plurality of clamping pieces provided with clamping grooves; the protection type light guide column structure is connected with external equipment through a clamping connection mode, so that the installation flow of the protection type light guide column structure is simplified, and meanwhile, higher connection efficiency is achieved. In addition, the connected mode of block need not to set up extra connection, easy to assemble, the saving degree in mounting panel space improves greatly, has realized the small and exquisite convenient purpose of leaded light post structure.

Further, the clamping piece is further provided with an inclined plane, the inclined plane extends from the clamping groove to the free end of the clamping piece, an included angle between the inclined plane and the axis of the clamping piece is an acute angle, and the inclined plane is used as a guide surface for realizing the front end of the clamping piece in the clamping connection process.

In the embodiment of the application, in order to realize smooth embedding of the clamping piece, the elastic deformation generated in the embedding process is utilized to increase the clamping area between the clamping piece and external equipment after complete embedding, the clamping piece is also provided with an inclined plane extending from the clamping groove to the free end of the clamping piece, an included angle between the inclined plane and the axis of the clamping piece is an acute angle, and the inclined plane is used as a guide surface for realizing the front end of the clamping piece in the clamping connection process.

Further, the number of the clamping pieces is even, the light guide columns are arranged at intervals along the length direction of the mounting plate, the clamping pieces are matched with each other in pairs to form clamping assemblies, the number of the clamping assemblies is greater than 1, the clamping assemblies are arranged at intervals along the arrangement direction of the light guide columns, and the two clamping pieces of each clamping assembly are symmetrically distributed on two sides of the light guide columns.

In the embodiment of the application, the clamping pieces are used as fixing components of the mounting plate, and in order to improve the connection stability of the clamping pieces to the mounting plate and the outside, the clamping pieces are paired into clamping components in pairs, the number of the clamping components is greater than 1 and the clamping components are distributed at intervals along the arrangement direction of the light guide columns, and the two clamping pieces of each clamping component are symmetrically distributed on two sides of the light guide columns. Therefore, in the embodiment of the application, the mounting plate is connected with the outside through the symmetrically arranged clamping pieces, and when the clamping connection at one end is about to loose, the clamping pieces at the symmetrical end are not loose, so that the clamping pieces fixed on the external equipment can exert force on the activities of the symmetrical clamping pieces. The clamping pieces which are symmetrically arranged limit the movement of each other, so that the probability that the protective type light guide column structure loosens from external equipment is reduced, and the stability of the connection between the protective type light guide column structure and the external equipment is improved. Meanwhile, the symmetrical clamping connection can also avoid the problem that after the mounting plate is mounted, any clamping piece is unevenly distributed in stress, so that the connection stability of a certain part of the mounting plate and external equipment is lower, and further the flange cannot be tightly inserted on the external equipment.

Further, the edge track of the flange coincides with the edge track of the mounting plate, the axes of the light guide columns are parallel to each other, and the flange extends along the direction of the axes of the light guide columns.

In the embodiment of the application, in order to improve the connection tightness of the light guide column structure after being connected with external equipment, the edge track of the flange is overlapped with the edge track of the mounting plate, so that the connection gaps between the mounting plate and each side surface of the external equipment are reduced. Meanwhile, in order to avoid the influence of the flange on the installation process of the light guide column structure, when the axes of the light guide columns are parallel, the flange extends along the axial direction of the light guide column.

Further, an electronic device includes the protective light guide column structure;

The LED lamp further comprises a shell, wherein a stepped hole is formed in the shell, the light guide column penetrates through the stepped hole and is fixed on the stepped hole, an annular groove is formed in a step of the stepped hole, a rubber ring is arranged on the bottom side of the annular groove, and the flange covers and abuts against the rubber ring.

In the embodiment of the application, the electronic equipment is further provided with the protective type light guide column structure and the shell, and in order to simplify the connection between the protective type light guide column structure and the shell, the shell is provided with a stepped hole, and the protective type light guide column structure can be fixed on the stepped hole. The light guide column passes through the stepped hole, so that the light guide column enters the shell and guides a light source. In order to ensure the connection tightness between the shell and the protective light guide column structure, an annular groove is arranged on the step of the stepped hole, and a rubber ring is arranged at the bottom side of the annular groove; the rubber ring can store deformation after being pressed, and meanwhile, contact pressure is generated, so that blocking and sealing effects on gaps are achieved. In the embodiment of the application, the problem of uncontrollable deformation of the rubber ring is avoided because each part of the rubber ring is limited by the steps and the flanges by the way that the provided flange covers and butts against the rubber ring, the rubber ring realizes effective filling of the connecting hole of the mounting plate and the external equipment, and the installation and the compactness of the protective light guide column structure are optimized.

Further, a low-voltage metering detection device comprises the electronic device;

The shell is connected with the shell, a connecting flange is arranged on one side of the shell, which is connected with the end cover, a connecting groove is arranged on the end cover, which is connected with the shell, and the connecting flange is matched with the connecting groove; and a rubber sealing ring is arranged in the connecting groove, and the edge track of the rubber sealing ring coincides with the edge track of the connecting groove.

In the embodiment of the application, the low-pressure metering detection equipment is further provided with the electronic equipment and the end cover, in order to ensure the tightness of the end cover when the end cover is connected with the electronic equipment, the shell is further provided with the connecting flange, and the end cover is provided with the connecting groove matched with the connecting flange, so that the rubber sealing rings distributed along the connecting groove are arranged on the connecting groove, and in the process of matching the connecting flange with the connecting groove, the end cover is tightly connected with the shell through the arranged rubber sealing rings, thereby avoiding the influence of external factors on the working reliability of the low-pressure metering detection equipment.

In summary, compared with the prior art, the utility model has the following beneficial effects: the protection type light guide column structure comprises a mounting plate provided with a flange and a clamping piece, the traditional connection mode of the protection type light guide column structure from inside to outside is avoided, the connection of the protection type light guide column structure is simplified through the clamping connection of the clamping piece and the insertion connection of the flange and external equipment, and meanwhile, the sealing performance is improved. In addition, the tightness of the connection between the protective light guide column structure and external equipment is improved by matching the flange with the rubber ring. The protective type light guide column structure can be further assembled on electronic equipment and low-voltage metering detection equipment, and the electronic equipment can be closely matched with the protective type light guide column structure through the stepped holes; the connecting grooves formed in the low-voltage metering detection equipment are matched with the connecting flanges formed in the shell, so that a tight connection state between parts can be achieved, the influence of external factors such as dust, water vapor and the like on the work of the light guide column is avoided, and the work of the electronic equipment and the low-voltage metering detection equipment is smoothly carried out.

Drawings

The accompanying drawings, which are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a protective light guiding column structure according to the present embodiment;

Fig. 2 is a schematic structural diagram of the electronic device according to the present embodiment;

FIG. 3 is a schematic view of the structure of the housing and the outer device of the end cap in this embodiment;

fig. 4 is a schematic structural diagram of the low-pressure metering detecting apparatus according to the present embodiment.

The names corresponding to the reference numerals are: 1. a housing; 2. a mounting plate; 3. a light guide column; 5. a rubber ring; 6. a clamping piece; 7. a clamping groove; 8. a guide block; 9. a flange; 10. a stepped hole; 11. an end cap.

Detailed Description

For the purpose of making apparent the objects, technical solutions and advantages of the present utility model, the present utility model will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present utility model and the descriptions thereof are for illustrating the present utility model only and are not to be construed as limiting the present utility model.

Example 1:

As shown in fig. 1 to 4, in this embodiment, the protective light guide column structure includes a mounting plate 2 and a plurality of light guide columns 3, the light guide columns 3 are all located on the same side of the mounting plate 2, meanwhile, a flange 9 is further provided on the mounting plate 2, the flange 9 can be plugged with external equipment, the flange 9 and the plurality of light guide columns 3 are all located on the same side of the mounting plate 2, and the root of the light guide column 3 is located in an area surrounded by the flange 9. In this embodiment, when the external device is matched with the protective light guide column structure, since the mounting plate 2 is provided with the flange 9, the external device matched with the protective light guide column structure is provided with an annular groove matched with the flange 9; when the mounting plate 2 is fixed with an external device, a flexible material such as a rubber ring 5 can be placed in the annular groove as a sealing element, the rubber ring 5 placed in the annular groove is limited by the inner wall of the annular groove, after the flange 9 abuts against the annular groove, the rubber ring 5 deforms and fills a connecting gap between the flange 9 and the annular groove, the annular groove plays a role of positioning the rubber ring 5 and a role of positioning the mounting plate 2 (realized by the flange 9), and the connection tightness of the protective light guide column structure and the external device is ensured. In addition, as the flange 9 is inserted into the annular groove of the external device, when the mounting plate 2 is influenced by external factors, the flange 9 positioned in the annular groove is limited by the inner wall of the annular groove, so that the probability that the protective light guide column structure slips from the external device is reduced. In this embodiment, in order to further improve the tightness of the connection between the mounting plate 2 and the external device after the flange 9 is mated with the annular groove, the edge track of the flange 9 coincides with the edge track of the mounting plate 2; in this way, the flange 9 is directly restrained to the edge of the mounting plate 2, so that the whole mounting plate 2 can be completely attached to external equipment.

In this embodiment, the protection type light guide column structure further includes a plurality of clamping pieces 6, the clamping pieces 6 are provided with clamping grooves 7, and the mounting plate 2 is connected with external equipment through the clamping grooves 7 of the clamping pieces 6. The connection mode of block is because simple structure, easy operation, the connection flow of protection type leaded light post structure and external equipment can be simplified, the installation effectiveness of protection type leaded light post structure can be improved. In addition, because the installation of the mounting panel 2 that is equipped with the fastener 6 no longer needs other connection structure and only need through the card effect realization connection of fastener 6, mounting panel 2 construction space is saved, mounting panel 2 reduces in volume, has realized small and exquisite structural purpose. In this embodiment, the engaging member 6 and the light guiding column 3 are both located on the same side of the mounting plate 2, so that in order to reduce mutual obstruction between the light guiding column 3 and the engaging member 6 during operation, the axial direction of the light guiding column 3 may be parallel to the axial direction of the engaging member 6, so that both working efficiency and performance of each other are not affected.

In this embodiment, in order to improve the connection efficiency of the engaging member 6 and simplify the structure for connecting the engaging member 6 and the related components, the guiding surface is used to induce the engaging member 6 to deform during the embedding process, so that the engaging member 6 and the related components have a larger mating area, and an inclined surface is further provided on the engaging member 6. The inclined plane extends from the clamping groove 7 to the free end of the clamping piece 6, an included angle between the inclined plane and the axis of the clamping piece 6 is an acute angle, and as the inclined plane is used as the end part of the clamping piece, which is inserted, the contact area is smaller than that of the clamping piece without the inclined plane when the clamping piece 6 is inserted into the external equipment, the resistance of the clamping piece 6 in the process of clamping with the external equipment is reduced, and the clamping piece 6 can be inserted into the external equipment to be clamped more quickly.

In this embodiment, the number of the clamping pieces 6 is even, the light guide columns 3 are paired two by two to form clamping assemblies, the number of the clamping assemblies is greater than 1 and symmetrically distributed on two sides of the light guide columns 3 along the direction of the axis of the light guide columns 3, so that when the mounting plate 2 is connected with external equipment through the clamping pieces 6 in a clamping manner, the mounting plate 2 is stressed more uniformly in the connecting process due to the symmetrical distribution of the clamping pieces 6, and uneven stress of the protective light guide column structure after the mounting is avoided, so that the sealing reliability is reduced. In a specific implementation manner in this embodiment, the engaging members 6 are located at front and rear sides of the light guide column 3, when the engaging members 6 are engaged with the external device, as fixing components matched with the engaging members 6 are disposed on the external device, the engaging members 6 disposed front and rear can ensure that each part of the mounting board 2 is stressed uniformly after being mounted, and are not easy to fall from the external device, so that the mounting stability of the mounting board 2 is ensured. In another specific implementation manner of this embodiment, the engaging members 6 are symmetrically disposed on the left and right sides of the light guide column, the symmetrically disposed engaging members 6 mutually inhibit movement therebetween, and the engaging members 6 can still ensure uniform stress and stable installation performance due to the symmetrical arrangement of the engaging members 6 during the stress process.

In this embodiment, in order to further improve the tightness of the connection between the mounting board 2 and the external device after the flange 9 is connected to the external device, the edge track of the flange 9 coincides with the edge track of the mounting board 2; because the light guide column 3 needs to be inserted into an external device to realize the light guide effect, when the axes of a plurality of light guide columns 3 are parallel to each other, in order to avoid the influence of the flange 9 on the insertion of the light guide column 3 into the external device, the flange 9 can extend along the direction of the axis of the light guide column 3. Thus, in this embodiment, when the mounting board 2 is controlled so that the light guide column 3 is inserted into an external device, the insertion depth of the light guide column 3 is deepened until the flange 9 abuts against the mounting groove matched with the external device, the flange 9 is only located in the mounting groove, and the movements of the flange 9 and the light guide column 3 do not affect each other, so that the probability of abrasion of the mounting board 2 in the mounting process is reduced.

Example 2:

As shown in fig. 1 to 4, in this embodiment, the electronic device further includes the protective light guide column structure and a housing 1, the housing 1 is provided with a stepped hole 10, and after the light guide column 3 passes through the stepped hole 10, the light guide column 3 can enter the inner space of the housing 1, so as to achieve a guiding function for the light source. In this embodiment, when the mounting plate 2 is embedded in the stepped hole 10 in the housing 1, since the flange 9 can cover and abut against the rubber ring 5 located on the step of the stepped hole 10 when the mounting plate 2 is fixed on the housing 1, the flange 9 applies an external force to the rubber ring 5, and the rubber ring 5 is deformed by being pressed on the step, so as to fill the connection gap between the protective light guide structure and the housing 1. Therefore, the connection tightness between the shell 1 and the protective light guide column structure is improved. In another implementation manner of this embodiment, the stepped hole 10 is further provided with a guide block 8 with a plurality of mounting holes, the guide block 8 covers the stepped hole 10, a channel is formed by the portion of the mounting hole, which is communicated with the stepped hole 10, and a gap for the light guide column 3 and/or the fastening member 6 to move is left between the channels, so that when an operator controls the mounting plate 2 to be inserted into the stepped hole 10, the position where the mounting plate 2 is inserted and fixed can be rapidly determined through the arrangement of the channel, the mounting efficiency of the protective light guide column on the housing 1 is improved, and abrasion caused by the fact that the fastening position of the mounting plate 2 needs to be confirmed by continuous tests is avoided.

Example 3:

as shown in fig. 1 to 4, in this embodiment, the low-voltage metering detection device further comprises a low-voltage metering detection device provided with the electronic device and an end cover 11, wherein the end cover 11 is connected with a housing 1in the electronic device, a connecting flange is arranged on one side, connected with the end cover 11, of the housing 1, a connecting groove is arranged at a position, connected with the housing 1, of the end cover 11, and the connecting flange is matched with the connecting groove. In this embodiment, when the end cover 11 is connected to the housing 1, since the connecting groove is internally provided with a rubber seal ring with an edge track coincident with the edge track of the connecting groove, the housing 1 and the end cover 11 can be tightly attached by the connecting flange abutting against the rubber seal ring; therefore, in the use process of the protective light guide column structure, the protective light guide column structure is less influenced by external factors, the protective light guide column structure can effectively and reliably work, and the output accuracy of the working result of the low-voltage metering detection equipment is greatly improved. In this embodiment, in order to simplify the connection manner between the housing 1 and the end cover 11, threaded holes may be formed in both the housing 1 and the end cover 11, and the housing 1 and the end cover 11 may be firmly and simply connected by penetrating the threaded holes with bolts. Meanwhile, as the rubber sealing ring generates a reaction force to the end cover 11 in the use process, the stability of the connection of the shell 1 and the end cover 11 is easy to reduce, and the reinforcement mode of the connection of the shell 1 and the end cover 11 is simplified through the connection mode of bolts, so that the obstruction of the complex reinforcement process to the use of the low-pressure metering detection equipment is avoided.

The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the utility model, and is not meant to limit the scope of the utility model, but to limit the utility model to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims (8)

1. The utility model provides a protection type light guide column structure, includes mounting panel (2) and is located a plurality of light guide column (3) on mounting panel (2), its characterized in that, be equipped with flange (9) that can be used for pegging graft on mounting panel (2), light guide column (3) are all fixed on being equipped with mounting panel (2) side of flange (9), and, the hookup location of light guide column (3) on mounting panel (2) is located in the annular region that flange (9) encloses.

2. The protective light guide column structure according to claim 1, further comprising a plurality of clamping pieces (6), wherein the clamping pieces (6) and the light guide column (3) are located on the same side of the mounting plate (2); one end of the clamping piece (6) is fixed on the mounting plate (2), the clamping piece (6) is of a rod-shaped structure and extends along the axis direction of the light guide column (3), a clamping groove (7) is formed in the other end of the clamping piece (6), and the clamping groove (7) can be clamped and connected with external equipment.

3. The protective light guide column structure according to claim 2, wherein the engaging member (6) is further provided with an inclined surface, the inclined surface extends from the engaging groove (7) to the free end of the engaging member (6), an included angle between the inclined surface and an axis of the engaging member (6) is an acute angle, and the inclined surface is used as a guiding surface for realizing the front end of the engaging member (6) in the engaging connection process.

4. The protective light guide column structure according to claim 3, wherein the number of the clamping pieces (6) is even, the light guide columns (3) are arranged at intervals along the length direction of the mounting plate (2), the clamping pieces (6) are paired into clamping components in pairs, the number of the clamping components is greater than 1, the clamping components are arranged at intervals along the arrangement direction of the light guide columns (3), and two clamping pieces (6) of each clamping component are symmetrically distributed on two sides of the light guide columns (3).

5. A protective light guiding column structure according to claim 1, characterized in that the edge track of the flange (9) coincides with the edge track of the mounting plate (2), the axes of the light guiding columns (3) are mutually parallel, and the flange (9) extends in the direction of the axis of the light guiding columns (3).

6. An electronic device comprising the protective light guide structure of any one of claims 1 to 5;

The LED lamp further comprises a shell (1), wherein a stepped hole (10) is formed in the shell (1), the light guide column (3) penetrates through the stepped hole (10) and is fixed on the stepped hole (10), an annular groove is formed in a step of the stepped hole (10) and a rubber ring (5) is arranged on the bottom side of the annular groove, and the flange (9) covers and abuts against the rubber ring (5).

7. A low voltage metering inspection apparatus comprising the electronic device of claim 6.

8. A low pressure metering inspection apparatus as claimed in claim 7, wherein,

The novel portable electric power tool is characterized by further comprising an end cover (11), wherein the end cover (11) is connected with the shell (1), a connecting flange is arranged on one side, connected with the end cover (11), of the shell (1), a connecting groove is formed in the end cover (11) connected with the shell (1), and the connecting flange is matched with the connecting groove; and a rubber sealing ring is arranged in the connecting groove, and the edge track of the rubber sealing ring coincides with the edge track of the connecting groove.