Packing connecting structure

Abstract

The utility model relates to a packing connecting structure which comprises a sealing unit, a first connecting unit, a separating unit, a second connecting unit, a clamping tooth unit and at least one control unit. The sealing device has the advantages that the clamping tooth unit is fixed between the first end and the second end of the sealing unit through cooperative use of the separation unit, the clamping tooth unit and the control unit, the sealing unit can be tightly engaged and effectively extruded to be tightly attached, the gap size is reduced to the maximum extent, and therefore the sealing effect is improved, and the medium leakage risk is reduced; the separation unit is located between the first end and the second end of the sealing unit and attached to the first end and the second end of the sealing unit, gaps possibly appearing at the bent position of the sealing unit are further filled, the secondary sealing effect is achieved, the overall sealing reliability is improved, and the service life of the sealing unit is prolonged. And the first connecting unit and the second connecting unit are matched for use, so that the mounting position of each sealing unit can be determined.

Description

Technical Field

[0001] This utility model relates to the technical field of packing installation, and in particular to a packing connection structure. Background Technology

[0002] Sealing packing is typically woven from various fiber materials, commonly including graphite fiber and aramid fiber, and is often impregnated with special lubricants or additives to enhance its performance. Visually, sealing packing is a long, thin strip with a square or round cross-section. During installation, it must be tightly wrapped around the shaft or valve stem, or other parts requiring a seal.

[0003] Currently, when installing packing, the standard procedure involves cutting a specified length of packing, bending it into a circle, and then wrapping it around the area requiring sealing. However, after bending the packing into a circle, gaps are usually present. These gaps provide a channel for media leakage, especially under high pressure and high-speed fluid conditions. The media can more easily seep out from these gaps, reducing the sealing effect, affecting the normal operation of the equipment, and in severe cases, potentially causing production interruptions. Furthermore, when installing multiple packings, they are often staggered to avoid gaps in the same location. The position and angle of each packing need to be controlled during the process to ensure they are correctly staggered. This requires a high level of technical skill and operational experience from the installers, increasing the complexity and time cost of the installation.

[0004] Currently, no effective solutions have been proposed for the problems of gaps, reduced sealing effect, misaligned installation, and increased installation complexity in related technologies. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a packing connection structure to solve the problems of gaps, reduced sealing effect, misaligned installation, and increased installation complexity in related technologies.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A packing connection structure, comprising:

[0008] Sealing unit;

[0009] A first connecting unit is disposed at the bottom end of the sealing unit and abuts against the sealing unit;

[0010] A separating unit is disposed at the top of the first connecting unit and located between the first end and the second end of the sealing unit, and respectively abuts against the first end and the second end of the sealing unit;

[0011] A second connecting unit is arranged at the top end of the partition unit and located at the top end of the sealing unit and in contact with the sealing unit;

[0012] A clamping unit is movably arranged at the bottom end of the second connecting unit and used for clamping the first end of the sealing unit and the second end of the sealing unit in the vertical direction;

[0013] At least one operating unit is movably arranged at the top end of the second connecting unit and in contact with the clamping unit.

[0014] In some embodiments, the sealing unit comprises:

[0015] A sealing element is arranged with the second connecting unit at the top end thereof and the first connecting unit at the bottom end thereof, and the partition unit is arranged between the first end and the second end of the sealing element and in contact with the clamping unit.

[0016] In some embodiments, the first connecting unit comprises:

[0017] A first connecting element is arranged at the bottom end of the sealing unit and in contact with the sealing unit;

[0018] A limiting element is arranged through the first connecting element and in limiting connection with the second connecting unit of another packing connection structure, used for limiting the position of the other packing connection structure.

[0019] In some embodiments, the partition unit comprises:

[0020] A partition element is arranged at the top end of the first connecting unit, and the top end of the partition element is arranged with the second connecting unit and located between the first end and the second end of the sealing unit and in contact with the first end and the second end of the sealing unit, respectively.

[0021] In some embodiments, the partition unit further comprises:

[0022] A through slot element is arranged at the top end of the partition element and used for the clamping unit to pass through.

[0023] In some embodiments, the second connecting unit comprises:

[0024] A second connecting element is arranged at the top end of the partition unit, and the top end of the second connecting element is provided with the operation unit and is located at the top end of the sealing unit and abuts against the sealing unit and is limitingly connected with the first connecting unit of another packing connection structure.

[0025] A first recess element is arranged at the bottom end of the second connecting element, and the inner side of the first recess element is provided with the clamping tooth unit.

[0026] In some embodiments, the second connecting unit further comprises:

[0027] At least one rotating element is arranged at the top end of the second connecting element and is in communication with the first recess element and is rotatably connected with the operation unit.

[0028] In some embodiments, the clamping tooth unit comprises:

[0029] A clamping tooth element is movably arranged at the bottom end of the second connecting unit and abuts against the operation unit and is used for moving in the vertical direction to clamp the first end of the sealing unit and the second end of the sealing unit.

[0030] In some embodiments, the operation unit comprises:

[0031] An operation element is movably arranged at the top end of the second connecting unit and abuts against the clamping tooth unit.

[0032] In some embodiments, the operation unit further comprises:

[0033] A second recess element is arranged at the top end of the operation element and is used for inserting a screwdriver.

[0034] Compared with the prior art, the above technical scheme has the following technical effects:

[0035] The utility model discloses a packing connection structure, utilize the cooperation of between separating unit, card tooth unit and control unit with card tooth unit fixed between the first end and the second end of sealing unit, can tightly occlude sealing unit, effectively extrude sealing unit and make it closely adhere, the size of gap is reduced to the maximum, thereby improve sealing effect, reduce medium leakage risk, separating unit is located between the first end and the second end of sealing unit and adheres, further filled the gap that sealing unit bending place can appear, play secondary sealing effect, improve the reliability of overall sealing, prolong the service life of sealing unit, utilize the cooperation between first connecting unit and second connecting unit, can determine the installation position of every sealing unit. The installation personnel only need to operate according to the limiting mark of first connecting unit, reduced the installation difficulty, improved the installation efficiency, reduced the sealing failure problem that causes installation error, and first connecting unit and second connecting unit provide stable support for entire packing installation structure. It makes multiple sealing units form a stable whole after installation, can bear the vibration, impact and other external force in the equipment operation process, prevents sealing unit from displacement, loosening in the use process, ensures the long-term stability of sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is the three-dimensional structure schematic diagram of packing connection structure according to the utility model embodiment;

[0037] Figure 2 It is the explosion drawing of packing connection structure according to the utility model embodiment;

[0038] Figure 3 It is the installation schematic drawing of multiple packing connection structures according to the utility model embodiment;

[0039] Figure 4a It is the three-dimensional structure schematic diagram of sealing unit according to the utility model embodiment;

[0040] Figure 4b It is the three-dimensional structure schematic diagram of sealing unit in another state according to the utility model embodiment;

[0041] Figure 5 It is the three-dimensional structure schematic diagram of first connecting unit according to the utility model embodiment;

[0042] Figure 6 It is the three-dimensional structure schematic diagram of separating unit according to the utility model embodiment;

[0043] Figure 7a It is the three-dimensional structure schematic diagram of second connecting unit according to the utility model embodiment;

[0044] Figure 7bis a perspective structural schematic view of the second connecting unit according to the embodiment of the utility model from another view angle;

[0045] Figure 8 is a perspective structural schematic view of the clamping tooth unit according to the embodiment of the utility model;

[0046] Figure 9 is a perspective structural schematic view of the control unit according to the embodiment of the utility model.

[0047] The reference signs in it are: 10, sealing unit; 11, sealing element;

[0048] 20, first connecting unit; 21, first connecting element; 22, limiting element;

[0049] 30, separation unit; 31, separation element; 32, through slot element;

[0050] 40, second connecting unit; 41, second connecting element; 42, first recess element; 43, rotating element;

[0051] 50, clamping tooth unit; 51, clamping tooth element;

[0052] 60, control unit; 61, control element; 62, second recess element. DETAILED DESCRIPTION

[0053] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0054] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0055] The utility model will be further described below in conjunction with the drawings and specific embodiments, but not as the limitation of the utility model.

[0056] One illustrative embodiment of the utility model, such as Figure 1 、 Figure 2 、 Figure 3As shown in the drawings, a packing connection structure includes a sealing unit 10, a first connecting unit 20, a separating unit 30, a second connecting unit 40, a clamping unit 50 and at least one operating unit 60. The first connecting unit 20 is arranged at the bottom end of the sealing unit 10 and abuts against the sealing unit 10. The separating unit 30 is arranged at the top end of the first connecting unit 20 and located between the first end of the sealing unit 10 and the second end of the sealing unit 10, and abuts against the first end of the sealing unit 10 and the second end of the sealing unit 10 respectively. The second connecting unit 40 is arranged at the top end of the separating unit 30 and located at the top end of the sealing unit 10, and abuts against the sealing unit 10. The clamping unit 50 is movably arranged at the bottom end of the second connecting unit 40 and used to clamp the first end of the sealing unit 10 and the second end of the sealing unit 10 in the vertical direction. The operating unit 60 is movably arranged at the top end of the second connecting unit 40 and abuts against the clamping unit 50.

[0057] In some embodiments, the operating unit 60 is a plurality of operating units. The plurality of operating units 60 are arranged at equal intervals along the circumference of the second connecting unit 40.

[0058] As shown in the drawings, Figure 4a , Figure 4b The sealing unit 10 includes a sealing element 11. The top end of the sealing element 11 is provided with the second connecting unit 40, the bottom end of the sealing element 11 is provided with the first connecting unit 20, and the first end of the sealing element 11 and the second end of the sealing element 11 are provided with the separating unit 30 and clamped with the clamping unit 50.

[0059] In some embodiments, the sealing element 11 is made of graphite material, including but not limited to graphite material.

[0060] In some embodiments, the sealing element 11 is a packing.

[0061] As shown in the drawings, Figure 5 The first connecting unit 20 includes a first connecting element 21 and a limiting element 22. The first connecting element 21 is arranged at the bottom end of the sealing unit 10 and abuts against the sealing unit 10. The limiting element 22 is arranged through the first connecting element 21 and limitingly connected with the second connecting unit 40 of another packing connection structure, used to limit the position of the other packing connection structure.

[0062] Specifically, the first connecting element 21 is arranged at the bottom end of the sealing element 11 and abuts against the sealing element 11.

[0063] The cross section of the first connecting element 21 is a circular ring.

[0064] The size of the first connecting element 21 matches the size of the sealing element 11. Generally, the radial dimension (the radial dimension of the inner edge surface and the outer edge surface) of the first connecting element 21 is smaller than the radial dimension (the radial dimension of the inner edge surface and the outer edge surface) of the sealing element 11, and the axial dimension of the first connecting element 21 is smaller than the axial dimension of the sealing element 11.

[0065] In some embodiments, the first connecting element 21 is made of stainless steel.

[0066] In some embodiments, the first connecting element 21 is a first connecting plate.

[0067] The cross section of the limiting element 22 is in the shape of a circular arc.

[0068] The size of the limiting element 22 matches the size of the first connecting element 21. Generally, the distance between the outer edge surface and the inner edge surface of the limiting element 22 is smaller than the distance between the outer edge surface and the inner edge surface of the first connecting element 21, and the axial dimension (such as the depth) of the limiting element 22 is equal to the axial dimension (such as the thickness) of the first connecting element 21.

[0069] In some embodiments, the limiting element 22 is a limiting groove.

[0070] As shown in Figure 6 The separation unit 30 includes a separation element 31. The separation element 31 is arranged at the top end of the first connecting unit 20, the top end of the separation element 31 is provided with the second connecting unit 40, and is located between the first end of the sealing unit 10 and the second end of the sealing unit 10, and respectively abuts the first end of the sealing unit 10 and the second end of the sealing unit 10.

[0071] Specifically, the separation element 31 is arranged at the top end of the first connecting element 21, and is located between the first end of the sealing element 11 and the second end of the sealing element 11, and respectively abuts the first end of the sealing element 11 and the second end of the sealing element 11.

[0072] The cross section of the separation element 31 is in the shape of a rectangle.

[0073] The size of the separation element 31 matches the size of the first connecting element 21. Generally, the length of the separation element 31 is smaller than the distance between the outer edge surface and the inner edge surface of the first connecting element 21, the width of the separation element 31 is smaller than the radial dimension of the first connecting element 21, and the height of the separation element 31 is greater than the axial dimension of the first connecting element 21.

[0074] The size of the separation element 31 matches the size of the sealing element 11. Generally, the height of the separation element 31 is equal to the axial dimension of the sealing element 11.

[0075] In some embodiments, the partition element 31 is fixedly connected with the first connecting element 21, including but not limited to being integrally formed.

[0076] In some embodiments, the partition element 31 is made of stainless steel.

[0077] In some embodiments, the partition element 31 is a partition plate.

[0078] Further, the partition unit 30 further comprises a through-slot element 32. The through-slot element 32 is arranged at the top end of the partition element 31, for the tooth element 50 to pass through.

[0079] The cross section of the through-slot element 32 is rectangular.

[0080] The size of the through-slot element 32 matches the size of the partition element 31. Generally, the length of the through-slot element 32 is less than the length of the partition element 31, the width of the through-slot element 32 is equal to the width of the partition element 31, and the height of the through-slot element 32 is less than the height of the partition element 31.

[0081] In some embodiments, the through-slot element 32 is a through slot.

[0082] As shown in Figure 7a , Figure 7b The second connecting unit 40 comprises a second connecting element 41 and a first recess element 42. The second connecting element 41 is arranged at the top end of the partition unit 30, the top end of the second connecting element 41 is provided with the control unit 60, and is located at the top end of the sealing unit 10, and is in abutment with the sealing unit 10, and is limitingly connected with the first connecting unit 20 of another packing connection structure; the first recess element 42 is arranged at the bottom end of the second connecting element 41, and the inner side of the first recess element 42 is provided with the tooth element 50.

[0083] Specifically, the second connecting element 41 is arranged at the top end of the partition element 31, and is located at the top end of the sealing element 11, and is in abutment with the sealing element 11, and is limitingly connected with the limiting element 22 of another packing connection structure; the first recess element 42 is in communication with the through-slot element 32.

[0084] The cross section of the second connecting element 41 is arc-shaped.

[0085] The size of the second connecting element 41 matches the size of the partition element 31. Generally, the radial dimension of the second connecting element 41 is greater than the width of the partition element 31, the distance between the outer edge surface and the inner edge surface of the second connecting element 41 is equal to the length of the partition element 31, and the axial dimension of the second connecting element 41 is less than the height of the partition element 31.

[0086] The size of the second connecting element 41 matches the size of the limiting element 22. Generally, the radial size of the second connecting element 41 is equal to the radial size of the limiting element 22, the distance between the outer edge surface and the inner edge surface of the second connecting element 41 is equal to the distance between the outer edge surface and the inner edge surface of the limiting element 22, and the axial size of the second connecting element 41 is equal to the axial size of the limiting element 22.

[0087] In some embodiments, the second connecting element 41 is fixedly connected with the separating element 31, including but not limited to being integrally formed.

[0088] In some embodiments, the second connecting element 41 is made of stainless steel.

[0089] In some embodiments, the second connecting element 41 is a second connecting plate.

[0090] The cross section of the first groove element 42 is in the shape of a circular arc.

[0091] The size of the first groove element 42 matches the size of the second connecting element 41. Generally, the radial size of the first groove element 42 is smaller than the radial size of the second connecting element 41, the distance between the outer edge surface and the inner edge surface of the first groove element 42 is smaller than the distance between the outer edge surface and the inner edge surface of the second connecting element 41, and the axial size (such as the depth) of the first groove element 42 is smaller than the axial size (such as the thickness) of the second connecting element 41.

[0092] In some embodiments, the first groove element 42 is a first groove.

[0093] Further, the second connecting unit 40 further comprises at least one rotating element 43. The rotating element 43 is arranged at the top end of the second connecting element 41, is in communication with the first groove element 42, and is rotationally connected with the control unit 60.

[0094] The cross section of the rotating element 43 is in the shape of a circle.

[0095] The size of the rotating element 43 matches the size of the first groove element 42. Generally, the radial size of the rotating element 43 is smaller than the radial size of the first groove element 42, and the distance between the outer edge surface and the inner edge surface of the rotating element 43 is smaller than the distance between the outer edge surface and the inner edge surface of the first groove element 42.

[0096] The sum of the axial size of the rotating element 43 and the axial size of the first groove element 42 is equal to the axial size of the second connecting element 41.

[0097] The number of the rotating elements 43 matches the number of the control units 60. Generally, the number of the rotating elements 43 is equal to the number of the control units 60.

[0098] In some embodiments, the rotating element 43 is a plurality of rotating elements. The plurality of rotating elements 43 are equidistantly arranged along the circumference of the second connecting element 41.

[0099] In some embodiments, the rotating element 43 is a threaded hole.

[0100] As shown in Figure 8 the clamping unit 50 includes a clamping element 51. The clamping element 51 is movably arranged at the bottom end of the second connecting unit 40 and abuts against the control unit 60, and is used to move in the vertical direction to clamp the first end of the sealing unit 10 and the second end of the sealing unit 10.

[0101] Specifically, the clamping element 51 is movably arranged at the inner side of the first groove element 42 and clamps the first end of the sealing element 11 and the second end of the sealing element 11, respectively.

[0102] The cross section of the clamping element 51 is in the shape of a circular arc. The bottom end of the clamping element 51 is in the shape of a tooth structure.

[0103] The size of the clamping element 51 matches the size of the first groove element 42. Generally, the radial dimension of the clamping element 51 is equal to the radial dimension of the first groove element 42, the distance between the outer edge surface and the inner edge surface of the clamping element 51 is equal to the distance between the outer edge surface and the inner edge surface of the first groove element 42, and the axial dimension of the clamping element 51 is equal to the axial dimension of the first groove element 42.

[0104] In some embodiments, the clamping element 51 is made of stainless steel.

[0105] In some embodiments, the clamping element 51 is a clamping plate.

[0106] As shown in Figure 9 the control unit 60 includes a control element 61. The control element 61 is movably arranged at the top end of the second connecting unit 40 and abuts against the clamping unit 50;

[0107] Specifically, the control element 61 is threadedly connected with the rotating element 43 and abuts against the top end of the clamping element 51.

[0108] The cross section of the control element 61 is in the shape of a circle.

[0109] The size of the control element 61 matches the size of the rotating element 43. Generally, the radial dimension of the control element 61 is equal to the radial dimension of the rotating element 43, and the axial dimension of the control element 61 is greater than the axial dimension of the rotating element 43.

[0110] In some embodiments, the control element 61 is made of stainless steel.

[0111] In some embodiments, the manipulating element 61 is a manipulating screw.

[0112] Further, the manipulating unit 60 further comprises a second recess element 62.

[0113] The cross section of the second recess element 62 is cross-shaped.

[0114] The size of the second recess element 62 matches the size of the manipulating element 61.

[0115] In some embodiments, the second recess element 62 is a second recess.

[0116] The use method of the present utility model is as follows:

[0117] (I) installation operation

[0118] Cut the sealing element 11 to the specified length according to the requirement (refer to Figure 4b ), and bend it to a circle (refer to Figure 4a );

[0119] Place the bent sealing element 11 between the first connecting element 21 and the second connecting element 41, and make the partition element 31 between the first end and the second end of the sealing element 11;

[0120] Twist the manipulating element 61 to make it rotate along the circumference of the rotating element 43 and move along the axial direction of the rotating element 43 to the direction of approaching the toothed element 51 until the toothed element 51 is driven to abut against the first end and the second end of the sealing element 11.

[0121] (II) butt joint operation (take two packing connection structures as an example)

[0122] Place one packing connection structure on the top end of another packing connection structure, and make the limiting element 22 of one packing connection structure butt joint with the second connecting element 41 of another packing connection structure;

[0123] Finally, place the butt jointed packing connection structures at the specified position.

[0124] The utility model discloses the advantage lies in, utilize the cooperation of between the partition unit, the card tooth unit and the control unit with the card tooth unit fixed between the first end and the second end of the sealing unit, can tightly bite the sealing unit, effectively extrude sealing unit and make it closely adhere, maximum degree reduces the size of gap, thereby promotes the sealing effect, reduces medium leakage risk, the partition unit is located between the first end and the second end of the sealing unit and adheres, further filled the gap that sealing unit bending place can appear, plays secondary sealing effect, improves the reliability of overall sealing, prolongs sealing unit service life, utilizes the cooperation between the first connecting unit and the second connecting unit, can determine the installation position of every sealing unit. The installation personnel only need to operate according to the limiting mark of first connecting unit, reduces the installation difficulty, improves the installation efficiency, reduces the sealing failure problem of installation error, and the first connecting unit and the second connecting unit provide stable support for entire packing installation structure. It makes multiple sealing units form a stable whole after installation, can bear the vibration, impact and other external forces in the equipment operation process, prevents sealing unit from shifting, loosening in the use process, ensures the long-term stability of sealing effect.

[0125] The above only is the preferred embodiment of the utility model, and does not limit the implementation and protection scope of the utility model, and for the person skilled in the art, should be able to realize that the scheme obtained by equivalent replacement and obvious change of the utility model specification and drawing content, should include in the protection scope of the utility model.

Claims

1. A packing connection structure characterized by comprising: The utility model relates to a sealing structure of a disc packing connection, which comprises a sealing unit, a first connecting unit arranged at the bottom end of the sealing unit and in contact with the sealing unit, a separation unit arranged at the top end of the first connecting unit and between the first end of the sealing unit and the second end of the sealing unit and in contact with the first end of the sealing unit and the second end of the sealing unit respectively, a second connecting unit arranged at the top end of the separation unit and in contact with the top end of the sealing unit, a clamping tooth unit movably arranged at the bottom end of the second connecting unit and used for clamping the first end of the sealing unit and the second end of the sealing unit in the vertical direction, and at least one control unit movably arranged at the top end of the second connecting unit and in contact with the clamping tooth unit. The sealing unit comprises a sealing element, the top end of the sealing element is provided with the second connecting unit, the bottom end of the sealing element is provided with the first connecting unit, the separation unit is arranged between the first end of the sealing element and the second end of the sealing element and in contact with the clamping tooth unit, and the first end of the sealing element and the second end of the sealing element are clamped by the clamping tooth unit. The first connecting unit comprises a first connecting element arranged at the bottom end of the sealing unit and in contact with the sealing unit, and a limiting element arranged through the first connecting element and in limiting connection with the second connecting unit of another disc packing connection structure and used for limiting the position of another disc packing connection structure. The separation unit comprises a separation element arranged at the top end of the first connecting unit, the top end of the separation element is provided with the second connecting unit, and the separation element is arranged between the first end of the sealing unit and the second end of the sealing unit and in contact with the first end of the sealing unit and the second end of the sealing unit respectively. The separation unit further comprises a through groove element arranged at the top end of the separation element and used for allowing the clamping tooth unit to pass through. The second connecting unit comprises a second connecting element arranged at the top end of the separation unit, the top end of the second connecting element is provided with the control unit, the second connecting element is arranged at the top end of the sealing unit and in contact with the sealing unit, and the second connecting element is in limiting connection with the first connecting unit of another disc packing connection structure, and a first groove element arranged at the bottom end of the second connecting element, the inner side of the first groove element is provided with the clamping tooth unit. The second connecting unit further comprises at least one rotating element arranged at the top end of the second connecting element, in communication with the first groove element and in rotating connection with the control unit.

2. The packing connection structure according to claim 1, characterized by The clamping tooth unit comprises a clamping tooth element movably arranged at the bottom end of the second connecting unit and in contact with the control unit and used for clamping the first end of the sealing unit and the second end of the sealing unit in the vertical direction. The control unit comprises 3. The packing connection structure according to claim 1, characterized by ​ ​ ​ 4. The packing connection structure according to claim 1, characterized by ​ ​ 5. The packing connection structure according to claim 4, characterized by ​ ​ 6. The packing connection structure according to claim 1, characterized by ​ ​ ​ 7. The packing connection structure according to claim 6, characterized by ​ ​ 8. The packing connection structure according to claim 1, characterized by ​ ​ 9. The packing connection structure according to claim 1, characterized by ​ A control element is movably arranged at the top end of the second connecting unit and is in abutment with the latch unit.

10. The packing connection structure according to claim 8, characterized by The control unit further comprises: A second recess element is arranged at the top end of the control element for insertion of a screwdriver.

Images