Soft seal locking mechanism

Abstract

The invention discloses a soft seal locking mechanism which is used for solving the technical problem that an existing sealing structure wastes time and labor, and belongs to the technical field of soft seal. The locking device comprises a locking shaft, two pull rods and a mounting base, the upper portions of the pull rods are locking sections, the lower portions of the pull rods are connecting sections, the lower portions of the two pull rods are connected to the left side and the right side of the mounting base in a front-back staggered mode through connecting pin shafts, and the lower portions of the left side and the right side of the mounting base are connected with the lower portions of the pull rods through compression springs located on the lower sides of the connecting pin shafts. The lower side of the mounting seat is connected with a piston of a compression air cylinder, the compression air cylinder is fixed on the container body, a control mechanism is arranged on the container body on the upper side of the mounting seat, the control mechanism controls the distance between the middle parts of the two pull rods, the locking shaft is fixed on the container cover, the locking section is hook-shaped, and the locking section can be clamped on the locking shaft through the contraction of the piston of the compression air cylinder.

Description

Technical Field

[0001] The invention belongs to the technical field of soft seals, and in particular relates to a soft seal locking mechanism. Background Art

[0002] Some large equipment's switch covers are sealed with soft sealing structures that require greater pressure to seal. Existing products and equipment mostly use manual screw compression. Although the structure is simple, the operation is time-consuming and labor-intensive. It will be very laborious in the later stage of compression and sealing, and the compression force cannot be guaranteed to be consistent each time. Long-term operation will also cause wear of the screw structure and affect the sealing effect.

[0003] The soft seal is fixedly mounted on the container body, and the soft seal pressing block is fixedly mounted on the container cover. In the prior art, the screw is mounted on the container body through a pin, and the locking block is fixed on the container cover, and the purpose of pressing the soft seal is achieved by rotating the rotating rod.

[0004] With the continuous upgrading of products, there are higher requirements for the degree of automation of products. A locking device that can realize automatic control is needed to improve efficiency and maintain the consistency of multiple operations, and the mechanism is required to be as simple as possible. Summary of the invention

[0005] The purpose of the present invention is to provide a soft sealing locking mechanism for solving the technical problems of the existing sealing structure which is time-consuming and labor-intensive.

[0006] The present invention is achieved by adopting the following technical solutions: A soft-sealed locking mechanism comprises a locking shaft, two pull rods and a mounting seat, wherein the upper portion of the pull rod is a locking section, and the lower portion is a connecting section. The lower portions of the two pull rods are connected to the left and right sides of the mounting seat through a connecting pin shaft, which is staggered front and back. The lower portions of the left and right sides of the mounting seat are connected to the lower portions of the pull rods through compression springs, and the compression springs are located on the lower sides of the connecting pin shafts. A piston of a compression cylinder is connected to the lower side of the mounting seat, and the compression cylinder is fixed on a container body. A control mechanism is provided on the container body on the upper side of the mounting seat, and the control mechanism controls the distance between the middle portions of the two pull rods. The locking shaft is fixed on the container cover, and the locking section is in a hook shape, and the locking section can be stuck on the locking shaft through the contraction of the compression cylinder piston.

[0007] When in use, the compression cylinder piston contracts to drive the pull rod and the mounting seat to move downward. Under the joint action of the compression spring and the connecting pin, the pull rod moves downward and rotates around the connecting pin. At the same time, the control mechanism controls the distance between the middle parts of the two pull rods to gradually shorten, that is, the locking section of the pull rod gradually contacts the locking shaft, and the soft seal begins to compress.

[0008] As the compression cylinder continues to shrink, the soft seal is gradually compressed into place, and the movement of the compression cylinder is locked to keep the soft seal in a stable compression state, thereby achieving a sealing effect.

[0009] Further preferably, the position of the connecting pin of the pull rod is set to an arc, and the setting of the arc can make the rotation between the pull rod and the mounting seat smoother.

[0010] Further preferably, two grooves 1 for installing the pull rod are provided on the left and right sides of the mounting seat, and through holes for connecting pins are opened at the front and rear of the groove 1. Two grooves 2 for installing the compression spring are provided on the left and right sides of the mounting seat, and the outer side of the bottom of the groove 1 is connected with the outer side of the top of the groove 2. The lower part of the pull rod enters the groove 2 through the outer side of the bottom of the groove 1, and the arc of the pull rod is stuck in the groove 1.

[0011] Further preferably, a surface of the mounting seat close to the container body is flat, so as to facilitate sliding of the mounting seat on the container body.

[0012] Further preferably, the bottom width of the pull rod is smaller than the diameter of the pull rod at the arc position, and one side of the groove two connecting the compression spring is an inclined surface, and the slope of the inclined surface is consistent with the slope of the lower part of the pull rod when the locking section of the pull rod is stuck on the locking shaft, which is conducive to the compression spring axis being exactly a straight line after the soft seal is in place.

[0013] Further preferably, the compression cylinder is fixed to the container body by bolts, and the compression cylinder piston is fixed to the bottom of the mounting seat by threads.

[0014] Further preferably, the container cover and the container body are jointly provided with an in-place switch. Specifically, the container cover is provided with a receiving device of the in-place switch, and the container body is provided with a transmitting device of the in-place switch. When the receiving device and the transmitting device are in contact, it indicates that the soft seal is compressed into place. The setting of the in-place switch can accurately determine whether the soft seal is compressed into place.

[0015] Further preferably, the control mechanism comprises a control cylinder, the control cylinder is equipped with a control valve, and the control cylinder enables the control valve to control the distance between the middle parts of the two pull rods through a control program.

[0016] Further preferably, the control mechanism includes two control axes, a fitting curve is set in the middle part of the pull rod, and the two control axes are installed on the container body on the upper side of the mounting seat. During the movement of the compression cylinder piston, the fitting curve in the middle part of the pull rod moves along the control axis, and the two control axes control the distance between the middle parts of the two pull rods at all times.

[0017] Further preferably, the control shaft can rotate to facilitate the relative movement between the middle part of the pull rod and the control shaft.

[0018] Further preferably, the fitting curve is convex first and then concave from the near mounting seat end to the far mounting seat end, and the speed change of the container cover and the container body during compression is first fast and then slow, and the convexity and concavity of the curve can be used to adjust the speed of soft sealing.

[0019] Further preferably, the maximum distance between the two pull rod openings is greater than the diameter of the locking shaft, so as to facilitate full opening of the container cover.

[0020] The beneficial effects of the tooling of the present invention are as follows: 1. Use compression spring for automatic reset operation to achieve automatic control.

[0021] 2. The rotation and locking action are realized through the connecting rod and pin structure, the structure is simple, easy to maintain and has better adaptability.

[0022] 3. Use cylinder as power source for locking, and maintain consistency after multiple operations.

[0023] 4. Control the motion trajectory through curve design. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of an existing soft seal locking mechanism is shown.

[0027] Figure 2 A schematic diagram showing a state in which the pull rod of the present invention and the locking shaft are just in contact.

[0028] Figure 3 A schematic diagram showing a locking state of the present invention is shown.

[0029] Figure 4 The mounting seat of the present invention is shown schematically Figure 1 .

[0030] Figure 5 The mounting seat of the present invention is shown schematically Figure 2 .

[0031] In the figure: 1-locking shaft, 2-pull rod, 21-locking section, 22-fitting curve, 23-connecting section, 3-connecting pin, 4-mounting seat, 41-mounting hole, 42-groove one, 43-through hole, 44-groove two, 5-compression spring, 6-compression cylinder, 7-container body, 8-container cover, 9-control shaft. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0033] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0035] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] A soft seal locking mechanism comprises a locking shaft 1, two pull rods 2 and a mounting seat 4, wherein the upper portion of the pull rod 2 is a locking section 21, and the lower portion is a connecting section 23, and the lower portions of the two pull rods 2 are respectively connected to the left and right sides of the mounting seat 4 by connecting pins 3 in a front-to-back offset manner, and the lower portions of the left and right sides of the mounting seat 4 are connected to the lower portion of the pull rod 2 by compression springs 5, and the compression springs 5 ​​are located at the lower side of the connecting pins 3, and the lower side of the mounting seat 4 is provided with a mounting hole 41, and the mounting hole 41 is provided with an internal thread, and the mounting seat 4 is provided with a screw thread. The piston of the compression cylinder 6 is connected through the internal thread of the mounting hole 41. The compression cylinder 6 is fixed on the container body 7. A control mechanism is provided on the container body 7 on the upper side of the mounting seat 4. The control mechanism controls the distance between the middle parts of the two pull rods 2. The locking shaft 1 is fixed on the container cover 8. The locking section 21 is in a hook shape. The locking section 21 can be stuck on the locking shaft 1 through the contraction of the piston of the compression cylinder 6. The two pull rods 2 are staggered in installation so that the locking sections 21 of the pull rods 2 can both contact the locking shaft 1.

[0037] The position where the pull rod 2 is connected to the connecting pin 3 is set to be an arc.

[0038] Two grooves 42 for the pull rods 2 to be installed are arranged on the left and right sides of the mounting seat 4. Through holes 43 for the connecting pins 3 to pass through are opened in front and back of the grooves 42. Two grooves 44 for the compression springs 5 ​​to be installed are arranged on the left and right sides of the mounting seat 4. The outer side of the bottom of the groove 42 is connected with the outer side of the top of the groove 44. The lower part of the pull rod 2 enters the groove 44 through the outer side of the bottom of the groove 42, and the arc of the pull rod 2 is stuck in the groove 42. It should be noted that in order to make the two pull rods 2 staggered, the positions of the two grooves 42 also need to be staggered. Similarly, the groove 44 also needs to be staggered. The side of the mounting seat 4 close to the container body 7 is a plane.

[0039] The bottom width of the pull rod 2 is smaller than the diameter of the arc position of the pull rod 2. The side of the groove 2 44 connected to the compression spring 5 is an inclined surface, and the slope of the inclined surface is consistent with the slope of the lower part of the pull rod 2 when the locking section 21 of the pull rod 2 is stuck on the locking shaft 1.

[0040] The compression cylinder 6 is fixed to the container body 7 by bolts, and the container cover 8 and the container body 7 are both provided with an in-position switch.

[0041] During use, when the piston of the compression cylinder 6 contracts, it drives the pull rod 2 and the mounting seat 4 to move downward. Under the action of the compression spring 5, the pull rod 2 moves downward and rotates around the connecting pin 3. Under the action of the spring force, the middle part of the pull rod 2 contacts the control mechanism, and the locking section 21 of the pull rod 2 gradually contacts the locking shaft 1. At this time, the soft seal begins to compress.

[0042] During the continuous contraction of the compression cylinder 6, the control mechanism gradually reduces the distance between the middle parts of the two pull rods 2 until the soft seal is compressed into place, and the soft seal is kept in a stable compression state by locking the compression cylinder 6, thereby achieving a sealing effect.

[0043] When the container cover 8 needs to be opened, the piston of the compression cylinder 6 is extended. It should be noted that when opening the container cover 8, because there is a pressure difference between the inside and outside of the container, the speed of opening the container cover 8 should be slow at first and then fast.

[0044] In the first embodiment, the control mechanism comprises a control cylinder, and the control cylinder is equipped with a control valve. The control cylinder controls the distance between the middle parts of the two tie rods 2 through a control program.

[0045] In the second embodiment, the control mechanism includes two control shafts 9, a fitting curve 22 is set in the middle of the tie rod 2, and the two control shafts 9 are installed on the container body 7 on the upper side of the mounting seat 4. During the movement of the piston of the compression cylinder 6, the fitting curve 22 in the middle of the tie rod 2 moves along the control shaft 9, and the two control shafts 9 control the distance between the middle parts of the two tie rods 2 at all times.

[0046] In this embodiment, the control shaft 9 can rotate to facilitate the relative movement between the pull rod and the control shaft 9. The shape of the fitting curve 22 from the near mounting seat 4 end to the far mounting seat 4 end is convex first and concave later.

[0047] When in use, the pull rod 2 moves downward and rotates around the connecting pin 3. Under the action of the spring force, the fitting curve 22 of the pull rod 2 contacts the control shaft 9, and the locking section 21 of the pull rod 2 gradually contacts the locking shaft 1, at which time the soft seal begins to compress.

[0048] During the continuous contraction of the compression cylinder 6, the control shaft 9 gradually separates from the fitting curve 22 of the pull rod 2 and turns into the straight section of the pull rod 2 until the soft seal is compressed into place. By locking the movement of the compression cylinder 6, the soft seal maintains a stable compression state, thereby playing a sealing role.

[0049] In the second embodiment, the same pull rod 2 can be used when the compression amount of the equipment is the same. If the compression amount is different, the pull rod 2 needs to be replaced and the distance between the two control shafts 9 needs to be adjusted. When the container cover 8 is opened, this embodiment completes the reverse movement of the soft seal compression locking through a completely mechanical structure.

[0050] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A soft seal locking mechanism, characterized in that: The invention comprises a locking shaft (1), two pull rods (2) and a mounting seat (4), wherein the upper part of the pull rod (2) is a locking section (21), the lower parts of the two pull rods (2) are respectively connected to the left and right sides of the mounting seat (4) by means of a connecting pin (3) in a front-to-back offset manner, the lower parts of the left and right sides of the mounting seat (4) are connected to the lower parts of the pull rods (2) by means of a compression spring (5), the compression spring (5) is located on the lower side of the connecting pin (3), the lower side of the mounting seat (4) is connected to the piston of a compression cylinder (6), the compression cylinder (6) is fixed on a container body (7), a control mechanism is provided on the container body (7) on the upper side of the mounting seat (4), the control mechanism controls the distance between the middle parts of the two pull rods (2), the locking shaft (1) is fixed on a container cover (8), the locking section (21) is in a hook shape, and the locking section (21) can be stuck on the locking shaft (1) by the contraction of the piston of the compression cylinder (6).

2. A soft seal locking mechanism according to claim 1, characterized in that: The position where the pull rod (2) is connected to the connecting pin (3) is set to be an arc.

3. A soft seal locking mechanism according to claim 2, characterized in that: The mounting seat (4) is provided with two grooves (42) on the left and right sides for the pull rod (2) to be installed, and the groove (42) is provided with through holes (43) for the connecting pin shaft (3) to pass through at the front and rear sides. The mounting seat (4) is provided with two grooves (44) on the left and right sides for the compression spring (5) to be installed, and the outer side of the bottom of the groove (42) is connected with the outer side of the top of the groove (44). The lower part of the pull rod (2) enters the groove (44) through the outer side of the bottom of the groove (42), and the arc of the pull rod (2) is stuck in the groove (42).

4. A soft seal locking mechanism according to claim 3, characterized in that: A surface of the mounting seat (4) close to the container body (7) is a flat surface.

5. A soft seal locking mechanism according to claim 4, characterized in that: The bottom width of the pull rod (2) is smaller than the diameter of the pull rod (2) at the arc position, and the side of the second groove (44) connected to the compression spring (5) is an inclined surface, and the slope of the inclined surface is consistent with the slope of the lower part of the pull rod (2) when the locking section (21) of the pull rod (2) is stuck on the locking shaft (1).

6. A soft seal locking mechanism according to claim 1, characterized in that: The compression cylinder (6) is fixed to the container body (7) by means of bolts, and the piston of the compression cylinder (6) is fixed to the bottom of the mounting seat (4) by means of threads.

7. A soft seal locking mechanism according to claim 1, characterized in that: The container cover (8) and the container body (7) are both provided with an in-position switch.

8. A soft seal locking mechanism according to any one of claims 1 to 7, characterized in that: The control mechanism comprises a control cylinder, the control cylinder is equipped with a control valve, and the control cylinder enables the control valve to control the distance between the middle parts of the two pull rods (2) through a control program.

9. A soft seal locking mechanism according to any one of claims 1 to 7, characterized in that: The control mechanism comprises two control shafts (9), a fitting curve (22) is arranged in the middle of the pull rod (2), and the two control shafts (9) are mounted on a container body (7) on the upper side of a mounting seat (4). During the movement of the piston of the compression cylinder (6), the fitting curve (22) in the middle of the pull rod (2) moves along the control shaft (9), and the two control shafts (9) constantly control the distance between the middles of the two pull rods (2).

10. A soft seal locking mechanism according to claim 9, characterized in that: The control shaft (9) is rotatable.

11. A soft seal locking mechanism according to claim 10, characterized in that: The shape of the fitting curve (22) from the end near the mounting seat (4) to the end far from the mounting seat (4) is first convex and then concave.

12. A soft seal locking mechanism according to claim 1, characterized in that: The maximum distance between the openings of the two pull rods (2) is greater than the diameter of the locking shaft (1).

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