Tensile cable stuffing box

Abstract

The utility model discloses a tensile cable stuffing box, which comprises a stuffing box screw seat for a cable to pass through, a stuffing rubber plug, a self-lubricating gasket, a limiting gasket and a fixing cap, the stuffing box screw seat is provided with a middle connecting end face, a connecting main body and a tensile main body, in the penetrating direction of a cable, the connecting main body is provided with a threaded part for connection, the tensile main body is internally provided with an accommodating groove for assembly, the stuffing rubber plug and the fixing cap are respectively provided with a through hole for the cable to penetrate through, and the stuffing rubber plug and the fixing cap are sequentially arranged in the accommodating groove; wherein the containing groove comprises an inner section groove and an outer section groove, the packing rubber plug is placed in the inner section groove and is in clearance fit with the inner section groove, and the fixing cap is detachably installed in the outer section groove and makes contact with the packing rubber plug to extrude the packing rubber plug. And the packing rubber plug is tightly matched with the inner section groove and the outer surface of the cable penetrating through the inner section groove so as to form tensile connection. The utility model has the advantages of compact structure and good tensile effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power equipment, concretely relates to a tensile cable filling funnel. BACKGROUND

[0002] The filling funnel is commonly used for leading the cable into the closed cabin and isolating the internal and external environment of the electric control equipment. The existing cable filling funnel is mainly manufactured by the following methods: 1) cable hot vulcanization process, the electric wire and the aviation joint are placed in the mold, the cable and the aviation joint are adhered together by heating the vulcanized rubber, the base of the aviation joint is installed on the shell or the plane, and the external equipment is powered and communicated with the equipment in the shell by this way; the main defect of this method is that the mold and the injection molding machine are needed, and there are problems of long processing time, high cost, long time consumption and high expense; 2) glue pouring and sealing screw process, a through hole is punched in the middle of the screw, a sealing groove body is processed on the end face of the screw, the cable is passed through the hollow screw, then the epoxy resin or polyurethane glue is poured into the central hole part of the cable and the screw, the cable and the screw are bonded, and finally the screw is installed on the shell or the plane, and the external equipment is powered and communicated with the equipment in the shell by this way; the main defect of this method is that the manual and equipment requirements are high, the glue pouring machine and manpower are needed, and there are problems of troublesome operation, long glue curing time and high time cost. SUMMARY

[0003] In order to at least partially solve the problems in the prior art, the main purpose of the utility model is to provide a tensile cable filling funnel, which has the advantages of compact structure and good tensile effect.

[0004] In order to achieve the above main purpose, the utility model discloses a tensile cable filling funnel, which comprises a filling funnel screw seat for the cable to pass through, a filling rubber plug, a self-lubricating gasket, a limiting gasket and a fixing cap; the filling funnel screw seat has a middle connecting end face and connecting main bodies and tensile main bodies located on the opposite sides of the middle connecting end face, in the passing direction of the cable, the connecting main bodies are provided with threaded parts for connection, the inside of the tensile main bodies is provided with accommodating grooves for assembly, the filling rubber plug and the fixing cap are respectively provided with through holes for the cable to pass through, and the two are sequentially arranged in the accommodating grooves.

[0005] The accommodating grooves comprise inner section grooves and outer section grooves, the diameter of the outer section grooves is greater than that of the inner section grooves, the filling rubber plug is placed in the inner section grooves and forms a gap fit with the inner section grooves, and the ratio of the length of the filling rubber plug to the length of the inner section grooves is 1.2 or above in the passing direction of the cable; the self-lubricating gasket is arranged between the fixing cap and the filling rubber plug, the center hole diameter of the limiting gasket is smaller than the diameter of the cable and only allows the inner core of the cable to pass through, the accommodating grooves are provided with steps that are inwardly contracted, and the limiting gasket is placed on the steps and located on the opposite inner side of the filling rubber plug.

[0006] Wherein, the fixed cap is removably mounted to the outer section groove and in contact with the filler plug to extrude the filler plug, so that the filler plug is deformed and forms a tight fit between the inner section groove and the outer surface of the cable passing through the inside, thereby forming a tensile connection.

[0007] According to a specific embodiment of the present application, the inner end surface of the fixed cap is arranged to completely cover the outer end surface of the filler plug in the longitudinal section along the passing direction of the cable.

[0008] According to a specific embodiment of the present application, the outer section groove is provided with an inner connecting thread, and the fixed cap is provided with an outer connecting thread matched with the inner connecting thread.

[0009] According to a specific embodiment of the present application, the filler plug is a straight cylindrical plug, a tapered cylindrical plug, or an irregular plug with a tapered inner end and a straight outer end.

[0010] According to a specific embodiment of the present application, the connecting body is straight cylindrical or tapered cylindrical, and the threaded part is an outer thread arranged on the connecting body.

[0011] Preferably, the middle connecting end surface is provided with an annular groove and a sealing ring arranged in the annular groove.

[0012] The present application has the following advantages: a tensile cable filler box is provided, which is connected to the equipment through the threaded part on the connecting body, and the tensile connection is formed while the cable is assembled through the change of the matching relationship between the filler plug and the fixed cap in the tensile body. The self-lubricating gasket and the limiting gasket are arranged on both sides of the filler plug, which is beneficial to the deformation of the filler plug in the expected direction after being pressed, and has the advantages of compact overall structure, low cost, quick and convenient assembly process, and good tensile effect.

[0013] In order to more clearly illustrate the purpose, technical scheme and advantages of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a perspective structural view of the cable filler box embodiment of the present application;

[0015] Figure 2 is an exploded structural view of the cable filler box embodiment of the present application;

[0016] Figure 3 is a sectional view of the cable filler box embodiment of the present application at the assembled position;

[0017] Figure 4is the sectional structure view of the initial assembling position of the cable filling funnel embodiment of the utility model;

[0018] Figure 5 is the sectional structure view of the filling funnel screw seat;

[0019] Figure 6 is the sectional structure view of the cable filling funnel deformation example 1 of the utility model;

[0020] Figure 7 is the sectional structure view of the cable filling funnel deformation example 2 of the utility model;

[0021] Figure 8 is the sectional structure view of the cable filling funnel deformation example 3 of the utility model. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further described in detail below in combination with the drawings and specific embodiments. In the following description, a lot of specific details are set forth in connection with the embodiments in order to fully understand the utility model, but it should be understood that the following embodiments and detailed description are only for the purpose of illustration and do not limit the protection scope of the utility model.

[0023] The cable filling funnel of the embodiment is as shown in Figures 1-5 It includes filling funnel screw seat 10, filling rubber plug 20 and fixed cap 30; filling funnel screw seat 10 is assembled to other power equipment for cable 40 to pass through; filling rubber plug 20 is assembled to filling funnel screw seat 10 and is sleeved on cable 40, for respectively forming tensile connection with cable sheath and filling funnel screw seat 10; fixed cap 30 is assembled to filling funnel screw seat 10, for acting on filling rubber plug 20 to make filling rubber plug 20 produce deformation, preferably, the material of filling rubber plug 20 is butyronitrile rubber, and the shore hardness is about 60 degrees, for example, 60±5 degrees.

[0024] As shown in Figure 5 Filling funnel screw seat 10 has middle connecting end surface 11, connecting body 12 and tensile body 13, connecting body 12 and tensile body 13 are located at the opposite sides of middle connecting end surface 11, here, the side where connecting body 12 is located is the inner side, and the side where tensile body 13 is located is the outer side; wherein, in the passing direction of cable 40, connecting body 12 is provided with threaded part 14 for connection, and stable connection is carried out between threaded part 14 and other power equipment.

[0025] The connecting body 12 in the embodiment is specifically a straight cylinder, and the threaded portion 14 is an external thread arranged on the connecting body 12; in order to achieve a good and stable connection, an annular groove 15 is arranged on the middle connecting end face 11, and a sealing ring is arranged in the annular groove 15, which is specifically, for example, an O-shaped sealing ring; in assembly, the sealing ring is in contact with the shell of other electrical equipment to form a sealing and matching connection. As an optional variant, as shown in Figure 6 In the variant 1 shown, the connecting body 12 can also be a conical cylinder, which forms a pipe taper thread assembly structure with the external thread as a whole, and has good connection stability.

[0026] Please refer to Figures 3-5 , the inner part of the tensile body 13 is provided with an accommodating groove 16 for assembly, and the filler plug 20 and the fixing cap 30 are respectively provided with a perforation for the cable 40 to pass through, and the two are arranged in the accommodating groove 16 in sequence; wherein the accommodating groove 16 includes an inner section groove 161 and an outer section groove 162, the diameter of the outer section groove 162 is larger than that of the inner section groove 161, so as to allow the inner end face of the fixing cap 30 to completely cover the outer end face of the filler plug 20.

[0027] The filler plug 20 is placed in the inner section groove 161 and forms a gap fit therebetween, and the fixing cap 30 is removably installed to the outer section groove 162 and in contact with the filler plug 20 to extrude the filler plug 20, so that the filler plug 20 is deformed and forms a tight fit with the inner section groove 161 and the outer surface of the cable passing through the inner part thereof respectively to form a tensile connection. It should be noted that before the fixing cap 30 is assembled, the filler plug 20 is in a natural state and does not produce obvious deformation, at this time the filler plug 20 can be freely placed into the accommodating groove 16, and an example of the deformation process of the filler plug 20 after extrusion is shown in Figures 3-4 .

[0028] On the longitudinal section in the passing direction of the cable 40, the inner end face of the fixing cap 30 is arranged to completely cover the outer end face of the filler plug 20, and the main purpose of this arrangement is to more fully extrude the filler plug 20 by using the fixing cap 30, so that the filler plug 20 forms more sufficient deformation to be in contact with, extruded and tightly fitted with the outer surface of the cable 40 and the groove wall of the accommodating groove 16 respectively.

[0029] Further, a self-lubricating gasket 50 is arranged between the inner end face of the fixing cap 30 and the outer end face of the filler plug 20, which is beneficial to ensure that the friction between the fixing cap 30 and the filler plug 20 is smaller, and thus is beneficial to realize that the filler plug 20 produces smaller axial deformation, and finally realizes that the filler plug 20 forms more stable tight fit with the outer surface of the cable 40 and the groove wall of the inner section groove 161 respectively.

[0030] Please refer to Figure 5In the cable 40 passing direction, the length of the inner section groove 161 exceeds the length of the outer section groove 162, for example, the length of the outer section groove 162 is in the interval of 0.5-0.75 of the length of the inner section groove 161; in the embodiment, the ratio of the length of the filler plug 20 to the length of the inner section groove 161 is 1.2 and above, for example, 1.3, as shown, and the filler plug 20 is placed in the inner section groove 161 without protruding outward from the outer section groove 162, and the main purpose of this arrangement is to not only meet the requirement that the filler plug 20 has sufficient deformation space, but also to have sufficient deformation allowance, and to facilitate the assembly of the fixing cap 30. Figure 4

[0031] In the embodiment, the fixing cap 30 is specifically screwed in, that is, the outer section groove 162 is provided with an inner connecting thread 131, and the fixing cap 30 is provided with an outer connecting thread 31 matched with the inner connecting thread 131, and the assembly is achieved by continuously rotating the fixing cap 30 to extrude the filler plug 20. In other embodiments, the fixing cap 30 can also be pushed in, which will not be expanded here.

[0032] Figures 2-3 The filler plug 20 shown in the embodiment is a straight cylindrical plug, and for easy assembly, the inner end of the filler plug 20 is chamfered; as an optional variant, as shown in Figure 7 In the variant 2, the filler plug 20 can also be a tapered cylindrical plug (hollow truncated cone), and the size of the taper angle is preferably above 45 degrees; correspondingly, the inner section groove 161 is also arranged as a matching tapered cylindrical shape.

[0033] In other embodiments, the filler plug 20 can also be arranged as a special-shaped plug with a tapered inner end and a straight outer end, which will not be expanded here. As a further extension, as shown in Figure 8 In the variant 3, while the filler plug 20 is a tapered cylindrical plug, the connecting body 12 can also be a tapered cylindrical shape, and the sizes of the taper angles of the two can be the same or different, and there is no necessary correlation.

[0034] Further, the filler gland screw seat 10 is also provided with a limiting washer 60, and the center hole diameter of the limiting washer 60 is arranged to be smaller than the diameter of the cable 40 to only allow the internal core of the cable 40 to pass through; the limiting washer 60 is specifically arranged in the accommodating groove 16, and the accommodating groove 16 is provided with an inwardly recessed step 163, and the limiting washer 60 is placed on the step 163 part and located on the opposite inner side of the filler plug 20. As shown, Figure 3 The step 163 is specifically arranged on the inner side of the inner section groove 161, and the main purpose of the limiting washer 60 is to ensure that the cable 40 does not slide inwardly under pressure, and the overall structure is more stable.

[0035] ​Although the above describes the present application by examples, the above examples are only used for exemplarily describing the implementable schemes of the present application, and are not used for limiting the protection scope of the present application, and any equivalent replacement or change made by the person skilled in the art according to the present application should be also covered by the protection scope defined by the claims of the present application.

Claims

1. A pull-resistant cable gland characterized in that The filling funnel screw seat, the filling rubber plug, the self-lubricating gasket, the limiting gasket and the fixing cap are used for the cable to pass through. The filling funnel screw seat has a middle connecting end surface and connecting bodies and tensile bodies on opposite sides of the middle connecting end surface, and the connecting bodies are provided with threaded parts for connection in the direction of the cable passing through, and the tensile bodies are internally provided with accommodating grooves for assembly. The accommodating grooves include inner section grooves and outer section grooves, the outer section grooves are provided with diameters greater than those of the inner section grooves, the filling rubber plug is placed in the inner section grooves and forms a gap fit therebetween, the ratio of the length of the filling rubber plug to the length of the inner section grooves is 1.2 or above in the direction of the cable passing through, the self-lubricating gasket is arranged between the fixing cap and the filling rubber plug, the limiting gasket is provided with a central hole with a diameter smaller than that of the cable to allow only the inner core of the cable to pass through, the accommodating grooves are provided with inwardly-contracted steps, and the limiting gasket is placed on the steps and located on the opposite inner side of the filling rubber plug. The fixing cap is removably mounted to the outer section grooves and in contact with the filling rubber plug to extrude the filling rubber plug, so that the filling rubber plug is deformed and forms a tight fit with the inner section grooves and the outer surface of the cable passing through the inner section grooves to form a tensile connection.

2. A pull-resistant cable gland according to claim 1, characterised in that: In the longitudinal section in the direction of the cable passing through, the inner end surface of the fixing cap is arranged to completely cover the outer end surface of the filling rubber plug.

3. The pull-resistant cable gland of claim 1, wherein: The outer section grooves are provided with inner connecting threads, and the fixing cap is provided with outer connecting threads matched with the inner connecting threads.

4. The pull-resistant cable gland of claim 1, wherein: The filling rubber plug is a straight cylindrical rubber plug, a tapered cylindrical rubber plug or an abnormal rubber plug with a tapered inner end and a straight outer end.

5. The pull-resistant cable gland of claim 1, wherein: The connecting bodies are straight or tapered, and the threaded parts are external threads arranged on the connecting bodies.

6. The tensile cable gland of claim 5, wherein: The middle connecting end surface is provided with an annular groove and a sealing ring arranged in the annular groove.

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