CN114665428A - Quick-insertion type explosion-proof cable lead-in device and installation and use method - Google Patents

Abstract

The invention relates to a quick-plug type explosion-proof cable introduction device and an installation and use method, comprising an adapter component and an introduction component, the adapter component is installed on an inlet hole preset on the surface of an explosion-proof electrical equipment or an explosion-proof instrument shell; the The adapter assembly includes an adapter sleeve, the outer surface of the adapter sleeve is made with an explosion-proof thread, one end of the adapter sleeve is welded with a blocking ring platform, and the other end is limited by a limit ring groove, and an internal tooth washer is installed in the limit ring groove, so the A sliding sleeve is coaxially installed in the adapter sleeve, and a push plate is installed at one end of the sliding sleeve. The push plate is supported and fastened to the blocking ring platform by the inner hexagonal cylindrical end positioning screw, and the other end of the sliding sleeve is made into a tip portion, which is used for For point pressure contact with the inner tooth washer; the introduction component is used for inserting the coiled cable protection tube, the introduction component includes an introduction tube body, the introduction tube body is coaxially installed in the sliding sleeve, and its end is connected to the inner tooth washer. The inner teeth are clamped to realize socket locking. The invention has novel structure, quick installation, reduces damage to cables, and can realize self-locking.

Description

A quick-plug type explosion-proof cable entry device and installation and use method

technical field

The invention belongs to the technical field of explosion-proof electrical cable introduction, and relates to a cable introduction device, in particular to a quick-plug explosion-proof cable introduction device and an installation and use method.

Background technique

Cables are mostly made of one or more mutually insulated conductors and an outer insulating protective layer, which transmit power or information from one place to another; it may also consist of several or several groups of wires (at least two per group). A cable similar to a rope that is stranded), each group of wires is insulated from each other, and is often twisted around a center, and the entire outer surface is covered with a highly insulating coating; the cable has the characteristics of internal electricity and external insulation; When the cable is introduced into use, it is necessary to use a cable lead-in device, which refers to a device for introducing cables into electrical equipment without changing the explosion-proof type of the equipment.

However, most of the traditional cable entry devices have an integrated structure, specifically, the sealing lock nut and the rear nozzle device are integral structures, so that the entire cable entry device will rotate with the coiled tube when the staff is installing it. And rotation, it is easy to cause the cable to twist during the installation process and destroy its toughness.

The following patent documents related to the present application were found by searching, and the specific disclosure contents are as follows:

1. A special structure cable introduction device in a junction box and a manufacturing method (CN113922571A), comprising a threaded outer casing, characterized in that a rubber sealing inner casing is provided in the threaded outer casing, and the rubber sealing inner casing comprises a copper pipe and a The rubber sleeve is connected with a copper tube outside, and an explosion-proof joint surface is formed between the threaded outer sleeve and the copper tube.

2. An explosion-proof cable entry device (CN209029887U), including a casing, a cable inlet and a cable outlet, as well as a seal for sealing the cable inlet of a rubber sheathed cable and a protective O-ring for dustproof and waterproof sealing , There are explosion-proof threads in the cable inlet and outlet, and it is characterized in that the number of the cable inlets is 2-5, wherein the cable inlets are rubber sheathed cable inlets and armored sheathed cable inlets. One or more of the cable inlet and the spare cable inlet. The rubber sheathed cable inlet seal consists of an aging-resistant rubber sealing ring, a gasket, a plug and a compression nut. The inner diameter of the rubber sealing ring is based on the outer diameter of the cable. Optional; the cable inlet of the armored sheathed cable is provided with a pressure armor device for pressing the armor layer, and the passage between the cable inlet of the armored sheathed cable and the pressure armor device is filled with explosion-proof curing glue; spare cable The seal of the mouth is composed of anti-aging rubber sealing ring, gasket, explosion-proof plug and plug.

3. A cable entry device (CN209200639U), comprising a main body, a compression nut, an explosion-proof gel and a cable; the main body has a columnar structure and extends along an axis, and the inside of the main body has a cable hole penetrating the main body along the axis direction , the cable hole includes a nut connection section, a limit support section and a colloid filling section in sequence along the axis direction, the radial dimension of the nut connection section is larger than the radial dimension of the colloid filling section, and the limit support section The nut connecting section and the colloidal filling section are connected to each other in a segment, and the compression nut is provided with a cable perforation passing through the compression nut along the axis direction; the cable includes a cable body and a wire harness, and the wire harness is arranged on the on the main body of the cable; the cable passes through the cable hole, the compression nut is sleeved on the cable through the cable through hole and is threadedly connected with the nut connecting section, and the wire harness is threaded by the compression nut and the limiting support segments are simultaneously abutted in two opposite directions; the explosion-proof gel fills the gap between the cable and the gel-filled segment.

Through the comparison of technical features, the above-mentioned published patent documents are different from the technical structure of the present invention, which will not affect the inventiveness and novelty of the application of the present invention.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a quick-plug explosion-proof cable entry device with a novel structure, fast installation, less damage to the cable, and self-locking, and an installation and use method.

The present invention solves its technical problem by adopting the following technical solutions to realize:

A quick-plug type explosion-proof cable introduction device, comprising an adapter component and an introduction component, the adapter component is installed on a pre-set wire inlet hole on the surface of an explosion-proof electrical equipment or an explosion-proof instrument shell; the adapter component includes an adapter sleeve , the outer surface of the adapter sleeve is made with flameproof threads, the outer surface of one end is coaxially welded with a blocking ring platform, the inner surface of the other end is coaxially limited to a limit ring groove, and the middle part of the inner wall of the limit ring groove is also coaxial An annular slot is made for coaxially limiting the installation of the inner tooth washer, a sliding sleeve is coaxially installed in the adapter sleeve, and a push plate is coaxially installed at one end of the sliding sleeve, and the push plate passes through the inner hexagonal cylinder The end locating screw is tightly supported with the blocking ring platform of the adapter sleeve, and the other end of the sliding sleeve is made into a tip structure, which is used to make point pressure contact on the surface of the inner teeth of the inner tooth washer, and the sliding sleeve close to the tip position is in point pressure contact. The outer surface of the sleeve is also coaxially limited with a limit ring, which is clamped with the limit ring groove in the adapter sleeve; the introduction component is used for inserting a coiled cable protection tube, and the introduction component includes An introduction pipe body and an introduction joint, one end of the introduction pipe body is an insertion end, and the other end is coaxially installed with an introduction joint; the introduction pipe body is coaxially installed in the sliding sleeve of the adapter assembly, and is introduced into the insertion end of the pipe body It is clamped with the inner teeth of the inner tooth washer to realize socket locking.

Moreover, an explosion-proof joint surface is formed between the adapter sleeve and the sliding sleeve; an explosion-proof joint surface is also formed between the sliding sleeve and the introduction pipe body.

Furthermore, a stop ring is limited on the outer surface of the introduction tube on the side where the introduction joint is attached.

Moreover, the inner tooth washer is an elastic metal sheet-like structure.

Moreover, an annular groove is formed on the surface of the insertion end of the introduction pipe body, and the annular groove is snap-fitted with the inner tooth washer to achieve locking; and the depth of the annular groove is 1/3 of the depth of the annular slot.

Moreover, the end of the inner teeth of the inner tooth washer is bent toward one side of the insertion direction of the introduction tube body, and the end of the inner teeth is surrounded by the outer wall of the introduction tube to be fixed.

Moreover, the lead-in joint includes a through tube, and a cable protection tube is coaxially installed in the through tube; a pressure ring is coaxially formed on one end of the through tube.

Moreover, the introduction joint includes a joint body, a cable protection tube is installed in the joint body, and one end of the joint body is closed, and the cable protection tube is filled with filler.

The installation and use method of the quick-plug explosion-proof cable entry device is characterized in that it comprises the following steps:

A. Assembly of various parts:

Parts include: adapter sleeve, sliding sleeve, push plate, internal tooth washer, hexagon socket set screw, lead-in outer tube, lead-in joint;

First assemble the adapter assembly, first insert the sliding sleeve from the side where the limit ring groove of the adapter sleeve is set; the limit ring of the sliding sleeve is clamped with the limit ring groove of the adapter sleeve, and then the sliding sleeve extends from one end of the sliding sleeve Install the push plate with thread, and set the inner hexagonal cylindrical end positioning screw on the push plate to connect with the blocking ring platform of the connecting sleeve, and then clamp the inner tooth washer in the annular slot of the sliding sleeve; complete the installation of the adapter assembly ; Then assemble the lead-in assembly, connect the lead-in tube body with the lead-in connector; and then set the cable protection tube inside the internal lead-in assembly;

B. Installation:

First, install the adapter assembly through the explosion-proof thread of the adapter sleeve and the pre-set wire inlet hole on the surface of the explosion-proof electrical equipment or explosion-proof instrument shell, then extend the cable into the lead-in tube of the lead-in component, and then introduce the lead-in component into the lead-in pipe. The pipe body is coaxially inserted into the sliding sleeve of the adapter assembly to form a flameproof joint surface with the sliding sleeve; that is, the installation is completed;

C. Disassembly:

The knob pushes the inner hexagonal cylindrical end positioning screw on the plate, and manually pushes the push plate and the sliding sleeve, so that the tip of the sliding sleeve presses the inner teeth of the inner tooth washer, so that the inner teeth of the inner tooth washer are squeezed and deformed in the insertion direction to match the When the surface of the introduction pipe body is separated, the introduction pipe body of the introduction component can be pulled out at this time, that is, the disassembly is completed.

The advantages and positive effects of the present invention are:

The invention changes the traditional integrated form, and changes the traditional threaded connection into a socket-type connection, which greatly improves the speed of installation, and simultaneously solves the problem that the cable is easily twisted and the toughness of the cable is damaged during the installation process;

After the present invention is installed, an explosion-proof joint surface is formed between the adapter sleeve and the sliding sleeve, and an explosion-proof joint surface is formed between the sliding sleeve and the introduction pipe body, and the explosion-proof joint surface is arranged to greatly improve the explosion-proof effect;

The inner tooth washer of the present invention cooperates with the inner hexagonal cylindrical end positioning screw on the push plate to realize the locking and release of the device socket, and the setting of the limit ring platform on the introduction pipe body of the introduction component can play an important role in the insertion of the introduction pipe body. The function of blocking the limit, avoids the damage to the inner tooth washer caused by too much insertion of the introduced pipe body.

Description of drawings

1 is a schematic structural diagram of Embodiment 1 of the present invention;

2 is a schematic structural diagram of Embodiment 2 of the present invention;

FIG. 3 is a schematic view of the structure of the internal tooth washer according to the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

Embodiment 1, as shown in Figure 1:

A quick-plug type explosion-proof cable introduction device, including an adapter component and an introduction component 1, the adapter component is installed on an explosion-proof electrical equipment or a preset wire inlet hole on the surface of an explosion-proof instrument shell; the adapter component includes a adapter Sleeve 3, the outer surface of the adapter sleeve is made with explosion-proof threads, the outer surface of one end is coaxially welded with a blocking ring platform, and the inner surface of the other end is coaxially limited with a limit ring groove, and the middle part of the inner wall of the limit ring groove is also An annular slot is made coaxially for coaxial limit installation of the outer teeth 4-2 of the inner tooth washer 4. A sliding sleeve 5 is coaxially installed in the adapter sleeve, and one end of the sliding sleeve is coaxially installed with a The push plate 6 is supported and fastened to the blocking ring platform of the adapter sleeve by the inner hexagonal cylindrical end positioning screw 2, and the other end of the sliding sleeve is made into a pointed structure, which is used to align the inner teeth of the inner tooth washer. 4-1 The surface is in point pressure contact, and the outer surface of the sliding sleeve near the tip is also coaxially limited by a limit ring, which is clamped with the limit ring groove in the adapter sleeve to prevent the sliding sleeve. slide out from the adapter sleeve;

The introduction component is used for inserting a coiled cable protection tube 9, and the introduction component includes an introduction tube body 7 and an introduction joint 8, the introduction tube body is a hollow tube body, and the cable protection tube is coaxially installed in the tube body, The outer surface of the pipe body is smooth, one end is an insertion end, and the other end is coaxially installed with an introduction joint; the introduction pipe body is coaxially installed in the sliding sleeve of the adapter assembly, and the insertion end of the introduction pipe body It is clamped with the inner teeth of the inner tooth washer to realize socket locking;

In the specific implementation of the present invention, an explosion-proof joint surface is formed between the adapter sleeve and the sliding sleeve; an explosion-proof joint surface is also formed between the sliding sleeve and the introduction pipe body;

Further, a limit ring platform is also limited on the outer surface of the introduction pipe on the side where the introduction joint is installed, and the limit ring platform further realizes the socket and insertion limit;

The inner tooth washer is an elastic metal sheet structure with certain deformation toughness; and the end of the sliding sleeve is made into a tip portion, so that the sliding sleeve slides in the adapter sleeve to realize point pressure on the inner teeth of the inner tooth washer; In this way, the inner tooth washer can release the introduction pipe body of the introduction assembly; when the introduction pipe body of the introduction assembly needs to be pulled out from the sliding sleeve of the adapter assembly, the knob pushes the inner hexagonal cylindrical end positioning screw on the disk, so that the sliding The tip of the sleeve presses the inner teeth of the inner tooth washer, so that the inner teeth of the inner tooth washer are squeezed and deformed inwardly and separated from the surface of the introduction tube body, and the introduction component can be pulled out at this time;

The above-mentioned insertion end of the introduction tube body and the inner teeth of the inner tooth washer can be locked in the following two ways;

One is to make a ring groove on the surface of the insertion end of the introduction pipe body, and the inner teeth of the inner tooth washer are locked by clamping with the ring groove; and the depth of the ring groove is 1/3 of the depth of the ring groove , so that the inner tooth washer can be fixedly clamped in the adapter sleeve, and the inner tooth washer will not be dislodged due to the insertion of the pipe body;

The other is that the end of the inner teeth of the inner tooth washer is bent toward the side of the insertion direction of the introduction tube body, and the end of the inner teeth is surrounded and clamped to be fixed; this method is convenient for insertion, and because the inner teeth of the inner tooth washer The direction is bent to realize the function of anti-lock;

The introduction joint includes a through pipe, and a cable protection pipe is coaxially installed in the through pipe; the cable protection pipe is made of rubber, and multiple cables are arranged in parallel inside; one end of the through pipe is coaxially made with a pressure ring, and the The introduction joint is installed through the coaxial insertion of the through pipe into the end of the introduction pipe body;

Example 2:

As shown in Figure 2, it is similar to Embodiment 1, except that:

The introduction joint includes a joint body, one end of the joint body is closed, and the end of the joint body is made into a plug joint, and the other end of the joint body is installed with a cable protection tube, and a plurality of cables arranged in parallel are arranged in the cable protection tube. The cable protection tube is filled with filler to fix the multi-strand cables.

When the present invention is used, firstly, the adapter assembly is installed on the pre-set wire inlet hole on the surface of the explosion-proof electrical equipment or explosion-proof instrument shell; The limit ring platform and the inner tooth washer in the adapter assembly are snap-locked, and the installation is complete.

And the cable is set in the cable protection tube, the cable protection tube is placed in the lead-in tube body, and the lead-in tube body is coaxially inserted into the sliding sleeve of the adapter assembly, forming a second layer of flameproof joint surface with the sliding sleeve; thus further protecting the cable;

The invention also provides a method for installing and using a quick-plug type explosion-proof cable entry device, comprising the following steps:

A. Assembly of various parts:

Parts include: adapter sleeve, sliding sleeve, push plate, internal tooth washer, hexagon socket head set screw, lead-in outer tube, lead-in joint;

First assemble the adapter assembly, first insert the sliding sleeve from the side where the limit ring groove of the adapter sleeve is set; the limit ring of the sliding sleeve is clamped with the limit ring groove of the adapter sleeve, and then the sliding sleeve extends from one end of the sliding sleeve Install the push plate with thread, and set the inner hexagonal cylindrical end positioning screw on the push plate to connect with the blocking ring platform of the connecting sleeve, and then clamp the inner tooth washer in the annular slot of the sliding sleeve; complete the installation of the adapter assembly ; Then assemble the lead-in component, connect the lead-in tube body with the lead-in connector; and then set the cable protection tube inside the internal lead-in component;

B. Installation:

First, install the adapter assembly through the explosion-proof thread of the adapter sleeve and the pre-set wire inlet hole on the surface of the explosion-proof electrical equipment or explosion-proof instrument shell, then extend the cable into the lead-in tube of the lead-in component, and then introduce the lead-in component into the lead-in pipe. The pipe body is coaxially inserted into the sliding sleeve of the adapter assembly to form a flameproof joint surface with the sliding sleeve; that is, the installation is completed;

C. Disassembly:

The knob pushes the inner hexagonal cylindrical end positioning screw on the plate, and manually pushes the push plate and the sliding sleeve, so that the tip of the sliding sleeve presses the inner teeth of the inner tooth washer, so that the inner teeth of the inner tooth washer are squeezed and deformed in the insertion direction to match the When the surface of the introduction pipe body is separated, the introduction pipe body of the introduction component can be pulled out at this time, that is, the disassembly is completed.

The invention changes the traditional integrated form, and changes the traditional threaded connection into a socket-type connection, which greatly improves the installation speed and solves the problem that the coiled pipe is easily twisted and the toughness of the coiled pipe is damaged during the installation process;

After the installation of the present invention, the first layer of flameproof joint surface is formed between the adapter sleeve and the sliding sleeve, and the second layer of flameproof joint surface is formed between the sliding sleeve and the introduction pipe body, and the setting of the two layers of flameproof joint surface greatly improves the explosion-proof effect;

The inner tooth washer of the present invention cooperates with the inner hexagonal cylindrical end positioning screw on the push plate to realize the locking and release of the device socket, and the setting of the limit ring platform on the introduction pipe body of the introduction component can play an important role in the insertion of the introduction pipe body. The function of blocking the limit, avoids the damage to the inner tooth washer caused by too much insertion of the introduced pipe body.

Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims (9)

1. The utility model provides a formula explosion-proof cable entry device inserts soon which characterized in that: the anti-explosion device comprises a switching assembly and a lead-in assembly, wherein the switching assembly is arranged on a wire inlet hole preset on the surface of an anti-explosion electrical equipment or an anti-explosion instrument shell; the switching assembly comprises a switching sleeve, the outer surface of the switching sleeve is provided with explosion-proof threads, the outer surface of one end of the switching sleeve is coaxially welded with a blocking ring platform, the inner surface of the other end of the switching sleeve is coaxially provided with a limiting ring groove, the middle part of the inner wall of the limiting ring groove is also coaxially provided with an annular slot for coaxially limiting and installing an internal tooth gasket, a sliding sleeve is coaxially installed in the switching sleeve, one end of the sliding sleeve is coaxially provided with a pushing disc, the pushing disc is tightly supported and fixed with the blocking ring platform of the switching sleeve through an inner hexagonal cylindrical end positioning screw, the other end of the sliding sleeve is provided with a tip end structure for carrying out point pressing contact on the surface of an internal tooth of the internal tooth gasket, the outer surface of the sliding sleeve close to the tip end is also coaxially provided with a limiting ring, and the limiting ring groove in the switching sleeve is limited and clamped; the leading-in assembly is used for inserting a flexible cable protection pipe and comprises a leading-in pipe body and a leading-in connector, wherein one end of the leading-in pipe body is an inserting end, and the other end of the leading-in pipe body is coaxially provided with the leading-in connector; the leading-in pipe body is coaxially arranged in a sliding sleeve of the switching assembly, and the insertion end of the leading-in pipe body is clamped with the internal teeth of the internal tooth gasket to realize socket locking.

2. The quick-plugging explosion-proof cable leading-in device according to claim 1, characterized in that: an explosion-proof joint surface is formed between the adapter sleeve and the sliding sleeve; and an explosion-proof joint surface is also formed between the sliding sleeve and the introducing pipe body.

3. The quick-plugging explosion-proof cable leading-in device according to claim 1, characterized in that: the outer surface of the leading-in pipe body at one side of the leading-in connector is provided with a limit ring platform.

4. The quick-plugging type explosion-proof cable lead-in device according to claim 1, characterized in that: the internal tooth washer is of an elastic metal sheet structure.

5. The quick-plugging explosion-proof cable leading-in device according to claim 1, characterized in that: a ring groove is formed on the surface of the insertion end of the introducing pipe body, and the ring groove and the internal tooth gasket are clamped and mounted to realize locking; and the depth of the annular groove is 1/3 the depth of the annular slot.

6. The quick-plugging explosion-proof cable leading-in device according to claim 1, characterized in that: the end part of the inner tooth gasket is bent towards one side of the insertion direction of the introducing pipe body and is fixed by encircling the end part of the inner tooth on the outer wall of the introducing pipe body.

7. The quick-plugging explosion-proof cable leading-in device according to claim 1, characterized in that: the leading-in connector comprises a through pipe, and a cable protection pipe is coaxially arranged in the through pipe; and one end of the through pipe is coaxially provided with a compression ring.

8. The quick-plugging explosion-proof cable leading-in device according to claim 1, characterized in that: the leading-in connector comprises a connector body, a cable protection pipe is arranged in the connector body, one end of the connector body is closed, and the cable protection pipe is filled with filler.

9. The installation and use method of the quick-plugging explosion-proof cable lead-in device according to the claims 1 to 8 comprises the following steps: the method is characterized in that: the method comprises the following steps:

A. assembling of each part:

the component parts include: the device comprises a transfer sleeve, a sliding sleeve, a pushing disc, an internal tooth gasket, an inner hexagonal cylindrical end positioning screw, an introduction outer pipe and an introduction joint;

firstly, assembling a switching assembly, and firstly inserting a sliding sleeve from one side of the switching sleeve, which is provided with a limit ring groove; a limiting ring of the sliding sleeve is clamped with a limiting ring groove of the adapter sleeve, then a pushing disc is installed at one end of the sliding sleeve, which extends out of the sliding sleeve, in a threaded manner, an inner hexagonal cylindrical end positioning screw is arranged on the pushing disc, and is supported and fastened with a blocking ring platform of the connecting sleeve, and then the inner tooth gasket is clamped in an annular slot of the sliding sleeve; completing the installation of the switching assembly; then assembling an introducing assembly, and connecting an introducing pipe body with an introducing joint; arranging a cable protection pipe in the internal lead-in component;

B. installation:

firstly, mounting a switching assembly with an explosion-proof wire inlet hole preset on the surface of an explosion-proof electrical equipment or an explosion-proof instrument shell through an explosion-proof thread of a switching sleeve, then extending a cable wire to penetrate into an introducing pipe body of an introducing assembly, and then coaxially inserting the introducing pipe body of the introducing assembly into a sliding sleeve of the switching assembly to form an explosion-proof joint face with the sliding sleeve; namely the installation is finished;

C. disassembling:

the knob promotes hexagon socket head cap cylinder end set screw on the dish, and manual promotion pushes away dish and sliding sleeve for the sliding sleeve tip point presses internal tooth of internal tooth packing ring, thereby makes the internal tooth of internal tooth packing ring to inserting direction extrusion deformation with introduce body surface separation, can extract the body of introducing the subassembly this moment, dismantles promptly and accomplishes.

Images