Door lock of access door of cooling tower

Abstract

The utility model discloses a cooling tower access door lock which comprises an access door body, an outer side handle and an inner side handle, the outer side handle is installed on the outer side face of the access door body in a sliding mode, the inner side handle is installed on the inner side face of the access door body in a sliding mode, and the inner side handle and the outer side handle are fixedly connected. A through hole is formed in the side face of the access door body, the end of the inner side handle extends towards the through hole to form a spring bolt part, and in the locking state, the spring bolt part penetrates through the through hole and extends to the outer side of the access door body. The inner side handle and the outer side handle are arranged to form a linkage structure, the door lock can be independently operated inside or outside a tower, the problem that an existing door lock is limited by one-way operation is solved, and the door lock is simple in overall structure, low in cost and suitable for installation and use of various cooling tower access doors.

Description

Technical Field

[0001] This utility model relates to the field of cooling tower technology, and in particular to a door lock for a cooling tower maintenance door. Background Technology

[0002] Existing cooling towers are equipped with inspection doors, through which maintenance personnel enter the cooling tower to perform repairs. In order to open and close the inspection door, a lock is installed. The lock is mostly a one-way outward opening design, which must be operated from outside the tower. It is not possible to directly control the lock from inside the tower, which requires maintenance personnel to frequently enter and exit the tower, resulting in low maintenance efficiency and the problem of being limited by one-way operation. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a door lock for a cooling tower maintenance door, which can solve the problem of being restricted by one-way operation in the past.

[0004] To solve the above-mentioned technical problems, this utility model discloses a door lock for a cooling tower maintenance door, including a maintenance door body, an outer handle, and an inner handle. The outer handle is slidably installed on the outer side of the maintenance door body, and the inner handle is slidably installed on the inner side of the maintenance door body. The inner handle and the outer handle are fixedly connected. A through hole is provided on the side of the maintenance door body, and the end of the inner handle extends into the through hole to form a locking tongue. In the locked state, the locking tongue passes through the through hole and extends to the outside of the maintenance door body.

[0005] This also includes bolts and nuts; the outer handle includes a first mounting part arranged parallel to the inspection door body, the first mounting part having at least one first mounting hole; the inner handle includes a second mounting part arranged parallel to the inspection door body, the second mounting part having at least one second mounting hole axially aligned with the first mounting hole; the inspection door has at least one elongated hole, the shank of the bolt passes through the first mounting hole, the elongated hole, and the second mounting hole in sequence and is threadedly connected to the nut, and the shank of the bolt can slide along the length direction of the elongated hole.

[0006] The outer handle also includes a first handle portion that is perpendicular to the inspection door body. The right side of the first handle portion is fixed to the top of the first mounting portion, and the left side of the first handle portion extends downward to form a first reinforcing portion.

[0007] The first mounting part, the first handle part, and the first reinforcing part are integrally molded to make the cross-sectional shape of the outer handle U-shaped.

[0008] The first handle has a first through hole for inserting a human finger.

[0009] The inner handle also includes a second handle portion that is perpendicular to the inspection door body. The left side of the second handle portion is fixed to the top of the second mounting portion, and the right side of the second handle portion extends downward to form a second reinforcing portion.

[0010] The second mounting part, the second handle part, and the second reinforcing part are integrally molded structures, so that the cross-sectional shape of the inner handle is U-shaped.

[0011] The second handle has a second through hole for inserting a human finger.

[0012] The cross-sectional shape of the latch is L-shaped.

[0013] Compared with the prior art, the present invention has the following advantages: by setting the inner handle and the outer handle to form a linkage structure, the door lock can be operated independently inside or outside the tower, which solves the problem of the previous door lock being limited by one-way operation. The overall structure is simple and the cost is low, and it is suitable for the installation and use of various cooling tower maintenance doors. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the door lock structure of this utility model;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 This is an exploded view of the door lock in this utility model. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or end that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or ends.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] This utility model discloses a specific implementation of a door lock for a cooling tower maintenance door. Please see [link / reference]. Figures 1 to 3 The door lock includes the access door body 1, the outer handle 2, the inner handle 3, the bolt 4, and the nut 5.

[0022] As an improvement, the outer handle 2 is slidably mounted on the outer side of the inspection door body 1, and the inner handle 3 is slidably mounted on the inner side of the inspection door body 1. The inner handle 3 and the outer handle 2 are fixedly connected, so that the inner handle 3 and the outer handle 2 form a linkage structure, that is, the inner handle 3 can drive the outer handle 2 to slide, or the inner handle 3 can drive the inner handle 3 to slide.

[0023] For the preferred option, please see Figure 3The outer handle 2 includes a first mounting portion 21 arranged parallel to the access door body 1, with two first mounting holes. The inner handle 3 includes a second mounting portion 31 arranged parallel to the access door body 1, with two second mounting holes axially aligned with the first mounting holes. It should be noted that the number of first and second mounting holes can be selected according to actual needs. The access door has two elongated holes 12, each corresponding to one first mounting hole and one second mounting hole. The bolt 4 is a standard commercial bolt, consisting of a head and a shank fixed to the head. The shank of bolt 4 passes through the first mounting hole, the elongated hole 12, and the second mounting hole in sequence and is threadedly connected to nut 5. It can be understood that nut 5 is located inside the inspection door body 1, and bolt 4 is inserted from the outside of the inspection door body 1 so that the shank of bolt 4 passes through the elongated hole 12. The width of the elongated hole 12 is greater than or equal to the diameter of the shank of bolt 4, thereby enabling the shank of bolt 4 to slide along the length of the elongated hole 12.

[0024] In this embodiment, the tightness of the door lock can be adjusted by using nut 5. For example, if a greater force is required to push the outer handle 2 or the inner handle 3, the nut 5 can be tightened to increase the friction between the inner handle 3 and the access door body 1, as well as the friction between the outer handle 2 and the access door body 1. Conversely, if a smaller force is required to push the door lock to slide, the nut 5 can be loosened accordingly, thereby adjusting the force required to push the door lock.

[0025] In other embodiments, the connection and fixing method between the outer handle 2 and the inner handle 3 can also be achieved by other means such as pins and rivets.

[0026] In this embodiment, the outer handle 2 also includes a first handle portion 22 perpendicularly arranged to the access door body 1. The right side of the first handle portion 22 is fixedly connected to the top of the first mounting portion 21, and a first reinforcing portion 23 extends downward from the left side of the first handle portion 22. The first handle portion 22 has a first through hole 221 for inserting human fingers. In use, the first through hole 221 allows human fingers to be inserted, making it easier for maintenance personnel to push the outer handle 2 to slide. The first reinforcing portion 23 can improve the structural strength of the outer handle 2. Moreover, the outer handle 2 can fit snugly against the thumb of a human hand, which is more ergonomic and makes it more convenient to use. Similarly, the inner handle 3 also includes a second handle portion 32 perpendicularly arranged to the access door body 1. The left side of the second handle portion 32 is fixedly connected to the top of the second mounting portion 31, and a second reinforcing portion 33 extends downward from the right side of the second handle portion 32. The second handle portion 32 has a second through hole 321 for inserting human fingers. The inner handle 3 and the outer handle 2 in this embodiment have similar structures, and their similar parts have the same function.

[0027] Optionally, the first mounting part 21, the first handle part 22, and the first reinforcing part 23 are integrally formed, so that the cross-sectional shape of the outer handle 2 is U-shaped. This can be understood as the outer handle 2 being directly cut from channel steel, which is inexpensive, readily available, and economically efficient. Similarly, the second mounting part 31, the second handle part 32, and the second reinforcing part 33 are integrally formed, so that the cross-sectional shape of the inner handle 3 is U-shaped.

[0028] Please see Figure 2 The side of the maintenance door body has a through hole 11, and the end of the inner handle 3 extends a latch 34 toward the through hole 11. In the locked state, the latch 34 passes through the through hole 11 and extends to the outside of the maintenance door body 1. In this embodiment, the latch 34 has an L-shaped cross-section. It can be understood that the latch 34 is formed by the second handle 32 and the second reinforcing part 33 extending outward, and it can be used as a latch in a conventional lock to lock with the corresponding lock hole of the cooling tower.

[0029] Compared with the prior art, the cooling tower maintenance door lock of this utility model has a linkage structure formed by setting the inner handle 3 and the outer handle 2, which can be operated independently inside or outside the tower. This solves the problem of the previous door lock being limited by one-way operation. The overall structure is simple and the cost is low, and it is suitable for the installation and use of various cooling tower maintenance doors.

[0030] Finally, it should be noted that the cooling tower maintenance door lock disclosed in this utility model embodiment is only a preferred embodiment of this utility model and is only used to illustrate the technical solution of this utility model, not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A door lock for a cooling tower maintenance door, characterized in that, The device includes an inspection door body, an outer handle, and an inner handle. The outer handle is slidably mounted on the outer side of the inspection door body, and the inner handle is slidably mounted on the inner side of the inspection door body. The inner handle and the outer handle are fixedly connected. The side of the inspection door body has a through hole, and the end of the inner handle extends a locking tongue toward the through hole. In the locked state, the locking tongue passes through the through hole and extends to the outside of the inspection door body.

2. The cooling tower maintenance door lock according to claim 1, characterized in that, It also includes bolts and nuts; The outer handle includes a first mounting portion arranged parallel to the inspection door body, and the first mounting portion has at least one first mounting hole. The inner handle includes a second mounting portion arranged parallel to the inspection door body, and the second mounting portion has at least one second mounting hole axially aligned with the first mounting hole. The inspection door has at least one elongated hole. The shank of the bolt passes through the first mounting hole, the elongated hole, and the second mounting hole in sequence and is threaded to the nut. The shank of the bolt can slide along the length of the elongated hole.

3. The cooling tower maintenance door lock according to claim 2, characterized in that, The outer handle also includes a first handle portion that is perpendicular to the inspection door body. The right side of the first handle portion is fixed to the top of the first mounting portion, and a first reinforcing portion extends downward from the left side of the first handle portion.

4. The cooling tower maintenance door lock according to claim 3, characterized in that, The first mounting part, the first handle part, and the first reinforcing part are integrally formed, so that the cross-sectional shape of the outer handle is U-shaped.

5. The cooling tower maintenance door lock according to claim 3, characterized in that, The first handle has a first through hole for inserting a human finger.

6. The cooling tower maintenance door lock according to claim 2, characterized in that, The inner handle also includes a second handle portion that is perpendicular to the inspection door body. The left side of the second handle portion is fixedly connected to the top of the second mounting portion, and a second reinforcing portion extends downward from the right side of the second handle portion.

7. The cooling tower maintenance door lock according to claim 6, characterized in that, The second mounting part, the second handle part, and the second reinforcing part are integrally formed, so that the cross-sectional shape of the inner handle is U-shaped.

8. The cooling tower maintenance door lock according to claim 6, characterized in that, The second handle has a second through hole for inserting a human finger.

9. The cooling tower maintenance door lock according to claim 1, characterized in that, The cross-sectional shape of the latch is L-shaped.

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