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CN112290502B - Anti-dropping cable channel sealing structure - Google Patents

Anti-dropping cable channel sealing structure Download PDF

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Publication number
CN112290502B
CN112290502B CN202010978747.XA CN202010978747A CN112290502B CN 112290502 B CN112290502 B CN 112290502B CN 202010978747 A CN202010978747 A CN 202010978747A CN 112290502 B CN112290502 B CN 112290502B
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China
Prior art keywords
sleeve
cable channel
connection
plugging
pressing plate
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CN202010978747.XA
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CN112290502A (en
Inventor
钱江
胡伟源
朱晓峰
费孝杰
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Tongxiang Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Tongxiang Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
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Publication of CN112290502A publication Critical patent/CN112290502A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G9/00Installations of electric cables or lines in or on the ground or water
    • H02G9/06Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G9/00Installations of electric cables or lines in or on the ground or water
    • H02G9/10Installations of electric cables or lines in or on the ground or water in cable chambers, e.g. in manhole or in handhole

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Abstract

The invention discloses an anti-drop cable channel plugging structure, and aims to provide an anti-drop cable channel plugging structure which is convenient to operate and can reliably plug a port of a cable channel and effectively avoid the problem that water levels among cable wells are connected through cable channels due to the fact that plugging heads drop off. The sealing device comprises two sealing heads, wherein the two sealing heads are positioned in a cable channel of a cable well, and each sealing head comprises an inner pressing plate, an outer pressing plate and a rubber sealing sleeve body positioned between the inner pressing plate and the outer pressing plate; the pre-tightening compression spring is positioned between the two plugging heads; the pre-connection structure and the normal connection structure comprise normal connection ropes, the inner ends of the normal connection ropes are connected with the inner pressing plate of the second plugging head, and the outer ends of the normal connection ropes are connected with the outer pressing plate of the second plugging head; the pre-connection structure comprises a pre-connection rope, a limiting part arranged on the pre-connection rope and a connecting sleeve.

Description

Anti-drop type cable channel block structure
Technical Field
The invention relates to a plug device, in particular to an anti-drop cable channel plugging structure.
Background
At present, cable wells are generally located outdoors, and rainwater and external water sources often invade to cause water accumulation in the cable wells, so that when cables are not arranged in cable channels between the cable wells in the construction process or after the construction of the cable well project, a blocking head is required to block ports of the cable channels in the cable wells, and the problem that water enters into a plurality of or even dozens of cable wells due to the fact that water levels between the cable wells are connected through the cable channels is avoided. The existing plugging head for the cable channel generally adopts a rubber plug to directly plug a port of the cable channel, or compresses the rubber plug through a bolt to ensure that the rubber plug is expanded and fixed in the cable channel so as to plug the port of the cable channel; wherein, the rubber plug is adopted to directly block the plugging head of the port of the cable channel, and the dropping is easy to occur in the long-term use process; the rubber plug is pressed by a bolt, so that the rubber plug is expanded and fixed on the plugging head in the cable channel, and the bolt can be loosened in the long-term use process to cause the rubber plug to shrink and fall off; the blocking heads fall off, so that the water level among the cable wells is connected through the cable channels.
Disclosure of Invention
The invention aims to provide an anti-drop cable channel plugging structure which is convenient to operate and can reliably plug a port of a cable channel, and effectively avoid the problem that water levels among cable wells are connected through the cable channel due to the fact that a plugging head drops.
The technical scheme of the invention is as follows:
an anti-drop type cable channel blocking structure comprising:
the sealing device comprises two sealing heads, a first sealing head and a second sealing head, wherein the two sealing heads are positioned in a cable channel of a cable well, the first sealing head is close to a port of the cable channel, the second sealing head is positioned in the cable channel on the inner side of the first sealing head, the sealing heads comprise an inner pressing plate, an outer pressing plate and a rubber sealing sleeve body positioned between the inner pressing plate and the outer pressing plate, a limiting sleeve extending towards the outer pressing plate is arranged on the outer pressing plate, the rubber sealing sleeve body is sleeved on the limiting sleeve, one end of the rubber sealing sleeve body abuts against the inner pressing plate, the other end of the rubber sealing sleeve body abuts against the outer pressing plate, and a gap is formed between the limiting sleeve and the outer pressing plate;
the pre-tightening compression spring is positioned between the two plugging heads, one end of the pre-tightening compression spring abuts against the outer pressing plate of the second plugging head, and the other end of the pre-tightening compression spring abuts against the inner pressing plate of the first plugging head;
the normal connection structure comprises a normal connection rope, an inner through hole is formed in the inner pressing plate of the first plugging head, an outer through hole is formed in the outer pressing plate of the second plugging head, the inner end of the normal connection rope is connected with the inner pressing plate of the second plugging head, and the outer end of the normal connection rope sequentially penetrates through the outer through hole and the inner through hole and is connected with the outer pressing plate of the second plugging head;
the pre-connecting structure comprises a pre-connecting rope, a limiting part and a connecting sleeve, wherein the limiting part and the connecting sleeve are arranged on the pre-connecting rope, the connecting sleeve is arranged on an inner pressing plate of a first plugging head, a connecting sleeve through hole is formed in an outer pressing plate of the first plugging head, the outer end of the connecting sleeve extends outwards and penetrates through the connecting sleeve through hole, an axial containing hole extending along the axial direction of the connecting sleeve is formed in the outer end face of the connecting sleeve, the inner end of the pre-connecting rope is fixed on an outer pressing plate of a second plugging head, the outer end of the pre-connecting rope penetrates through an inner hole of the connecting sleeve, and the limiting part is located on the outer side of the connecting sleeve;
when the limiting piece is abutted against the outer end face of the connecting sleeve under the action of the pre-tightening compression spring, the pre-connecting rope is in a tightened state, and the normal-state connecting rope is in a loose state;
when the pre-connection rope close to the limiting part moves into the axial containing opening and the limiting part is positioned on the outer side of the side wall of the connecting sleeve, the pre-connection rope is in a loose state, and the normal connection rope is in a tight state under the action of the pre-tightening compression spring.
When the pre-connecting rope is in a loose state and the normal connecting rope is in a tight state under the action of the pre-tightening compression spring, the inner pressing plate and the outer pressing plate of the two plugging heads are close to each other under the action of the pre-tightening compression spring, so that the rubber sealing sleeve body between the inner pressing plate and the outer pressing plate is extruded, and the outer wall of the rubber sealing sleeve body is pressed on the inner wall of the cable channel.
When the device is installed, the limiting piece is abutted against the outer end face of the connecting sleeve under the action of the pre-tightening compression spring, so that the pre-connecting rope is in a tightened state, the normal connecting rope is in a loose state, at the moment, the elasticity of the pre-tightening compression spring acts on the inner pressing plate of the first sealing head and the outer pressing plate of the second sealing head, the inner pressing plate and the outer pressing plate of the two sealing heads cannot bear pressing force, the rubber sealing sleeve cannot be extruded outwards, and therefore the two sealing heads can be smoothly placed into a cable channel of a cable well;
when the port of shutoff cable channel, only need to remove the rope of pre-connection that is close to the locating part to the axial and hold in the mouth, and make the locating part be located the lateral wall outside of adapter sleeve, at this moment, the rope of pre-connection is in the lax state, the rope is in the state of tightening under the effect of pretension compression spring in the normality connection, two inside and outside clamp plates of two shutoff heads will be close to each other under the effect of pretension compression spring, thereby extrude the rubber seal cover body between two inside and outside clamp plates, extrude the rubber seal cover body outwards, so that the outer wall of the rubber seal cover body compresses tightly on cable channel's inner wall, and then realize fixing two shutoff heads in cable channel, and with cable channel's port shutoff. The anti-drop type cable channel plugging structure is not convenient to operate, the problems that bolt connection is not firm and falls off due to bolt looseness and the like do not exist, the port of the cable channel can be plugged reliably, and the problem that the plugging head falls off to cause the water level between cable wells to be connected through the cable channel is effectively avoided. On the other hand, the anti-drop cable channel plugging structure realizes that the plugging head is fixed in the cable channel through the elastic force provided by the pre-tightening compression spring, and the port of the cable channel is plugged, so that the cable channel cannot be damaged due to expansion of the plugging head fixed rigidly.
Preferably, the inner wall of the rubber sealing sleeve body abuts against the outer wall of the limiting sleeve.
Preferably, the pre-connection structure further comprises a guide sleeve, the guide sleeve is arranged on the outer pressing plate of the second plugging head, the inner end of the connection sleeve extends inwards and extends into the guide sleeve, the guide sleeve is in sliding fit with the connection sleeve, and the pre-connection rope is located in the guide sleeve.
Preferably, a sealing ring is further arranged between the guide sleeve and the connecting sleeve, and the guide sleeve is in sliding sealing fit with the connecting sleeve.
Preferably, the thickness of the rubber boot seal body is 1/5-1/4 of the inner diameter of the cable channel.
Preferably, the thickness of the rubber boot seal body is 1/4 of the inner diameter of the cable channel.
Preferably, a plurality of annular sealing bulges are arranged on the outer side surface of the rubber sealing sleeve body.
Preferably, the number of the normal state connecting ropes is at least two, the normal state connecting ropes are uniformly distributed around the circumferential direction of the rubber sealing sleeve body, the outer through holes correspond to the normal state connecting ropes one by one, and the inner through holes correspond to the normal state connecting ropes one by one.
Preferably, the outer pressing plate is circular, and the outer diameter of the outer pressing plate is smaller than that of the rubber sealing sleeve body.
Preferably, the inner pressing plate is circular, and the outer diameter of the inner pressing plate is smaller than that of the rubber seal sleeve body.
Preferably, a sealing ring is arranged between the connecting sleeve via hole and the connecting sleeve, and the sealing ring is fixed on a sealing ring mounting groove on the inner wall of the connecting sleeve via hole.
The invention has the beneficial effects that: the device is convenient to operate, can reliably plug the port of the cable channel, and effectively avoids the problem that the water level between each cable well is connected through the cable channel due to the fact that the plug falls off.
Drawings
Fig. 1 is a schematic structural view of an anti-drop cable channel blocking structure of the present invention.
Fig. 2 is a partial enlarged view of a portion a of fig. 1.
Fig. 3 is a partial structural schematic view of the anti-drop cable channel blocking structure of the present invention after the cable channel is blocked.
In the figure:
the rubber sealing sleeve comprises a sealing head 1, an inner pressing plate 1.1, an outer pressing plate 1.2, a rubber sealing sleeve body 1.3 and a limiting sleeve 1.4;
pre-tightening the compression spring 2;
the device comprises a pre-connection structure 3, a pre-connection rope 3.1, a connecting sleeve 3.2, an axial accommodating port 3.3, a limiting part 3.4, a guide sleeve 3.5 and a connecting sleeve through hole 3.6;
a normal connecting rope 4;
a cable well 5;
a cable channel 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1 and 2, an anti-drop cable channel plugging structure includes two plugging heads 1, a pre-tightening compression spring 2, a pre-connection structure 3 and a normal connection structure.
The two plugging heads are positioned in a cable channel 6 of the cable well 5 and are sequentially distributed along the length direction of the cable channel, wherein the first plugging head is close to a port of the cable channel, and the second plugging head is positioned in the cable channel at the inner side of the first plugging head. The plugging head 1 comprises an inner pressing plate, an outer pressing plate and a rubber sealing sleeve body 1.3 positioned between the inner pressing plate and the outer pressing plate. The outer pressing plate is provided with a limiting sleeve 1.4 extending towards the direction of the outer pressing plate. The rubber sealing sleeve body is sleeved on the limiting sleeve, and in the embodiment, the inner wall of the rubber sealing sleeve body is tightly leaned on the outer wall of the limiting sleeve. One end of the rubber seal sleeve body is propped against the inner pressure plate 1.1, and the other end of the rubber seal sleeve body is propped against the outer pressure plate 1.2. A gap is arranged between the limiting sleeve and the outer pressing plate.
In the inner pressing plate and the outer pressing plate of the same plugging head, the outer pressing plate is close to the port of the cable channel, and the inner pressing plate is positioned in the cable channel on the inner side of the outer pressing plate. In the embodiment, the outer pressing plate is circular, and the outer diameter of the outer pressing plate is smaller than that of the rubber seal sleeve body; of course, the outer pressing plate can also be in an oval shape or a polygonal shape; the inner pressing plate is circular, and the outer diameter of the inner pressing plate is smaller than that of the rubber seal sleeve body; of course, the inner pressure plate may be oval or polygonal.
The pre-tightening compression spring 2 is positioned between the two plugging heads, one end of the pre-tightening compression spring is propped against the outer pressing plate of the second plugging head, and the other end of the pre-tightening compression spring is propped against the inner pressing plate of the first plugging head.
The normal connection structure includes a normal connection string 4. The inner pressing plate of the first plugging head is provided with an inner through hole, and the outer pressing plate of the second plugging head is provided with an outer through hole. The inner end of the normal connecting rope is connected with the inner pressing plate of the second plugging head, and the outer end of the normal connecting rope sequentially penetrates through the outer through hole and the inner through hole and is connected with the outer pressing plate of the second plugging head.
The pre-connection structure 3 comprises a pre-connection rope 3.1, a limiting part 3.4 arranged on the pre-connection rope and a connecting sleeve 3.2. The connecting sleeve is arranged on an inner pressing plate 1.1 of the first plugging head, and an outer pressing plate of the first plugging head is provided with a connecting sleeve through hole 3.6. The outer end of the connecting sleeve extends outwards and penetrates through the connecting sleeve through hole. The outer end face of the connecting sleeve is provided with an axial accommodating opening 3.3 extending along the axial direction of the connecting sleeve. The inner end of the pre-connecting rope is fixed on the outer pressing plate of the second plugging head, and the outer end of the pre-connecting rope penetrates through the inner hole of the connecting sleeve. The locating part is located the outside of adapter sleeve. In this embodiment, the limiting member is a knot disposed on the pre-connection rope, or the limiting member is a limiting member fixed on the pre-connection rope.
As shown in fig. 2, when the limiting member abuts against the outer end surface of the connecting sleeve under the action of the pre-tightening compression spring, the pre-connecting rope is in a tightened state, and the normal connecting rope is in a loosened state.
As shown in fig. 3, when the pre-connection rope close to the limiting member moves into the axial receiving opening and the limiting member is located on the outer side of the side wall of the connecting sleeve, the pre-connection rope is in a loose state, and the normal connection rope is in a tight state under the action of the pre-tightening compression spring.
When the pre-connecting rope is in a loose state and the normal connecting rope is in a tight state under the action of the pre-tightening compression spring, the inner pressing plate and the outer pressing plate of the two plugging heads are close to each other under the action of the pre-tightening compression spring, so that the rubber sealing sleeve body between the inner pressing plate and the outer pressing plate is extruded, and the outer wall of the rubber sealing sleeve body is pressed on the inner wall of the cable channel.
When the device is installed, as shown in fig. 2, when the limiting member is abutted against the outer end face of the connecting sleeve under the action of the pre-tightening compression spring, the pre-connection rope is in a tightened state, the normal connection rope is in a loose state, at the moment, the elastic force of the pre-tightening compression spring acts on the inner pressing plate of the first plugging head and the outer pressing plate of the second plugging head, the inner pressing plate and the outer pressing plate of the two plugging heads are not pressed, the rubber sealing sleeve body is not extruded outwards, and therefore the two plugging heads can be smoothly placed into a cable channel of a cable well;
as shown in fig. 3, when plugging the port of the cable channel, only the pre-connection rope near the limiting part needs to be moved into the axial accommodating port, and the limiting part is located outside the side wall of the connecting sleeve, at this time, the pre-connection rope is in a loose state, the normal connection rope is in a tight state under the action of the pre-tightening compression spring, the inner and outer pressing plates of the two plugging heads are close to each other under the action of the pre-tightening compression spring, so as to extrude the rubber sealing sleeve body between the inner and outer pressing plates, and extrude the rubber sealing sleeve body outwards, so that the outer wall of the rubber sealing sleeve body is pressed on the inner wall of the cable channel, thereby fixing the two plugging heads in the cable channel, and plugging the port of the cable channel. The anti-drop type cable channel plugging structure is not convenient to operate, the problems that bolt connection is not firm and falls off due to bolt looseness and the like do not exist, the port of the cable channel can be plugged reliably, and the problem that the plugging head falls off to cause the water level between cable wells to be connected through the cable channel is effectively avoided.
On the other hand, the anti-drop cable channel plugging structure realizes that the plugging head is fixed in the cable channel through the elastic force provided by the pre-tightening compression spring, and the port of the cable channel is plugged, so that the cable channel cannot be damaged due to expansion of the plugging head fixed rigidly.
Further, as shown in fig. 2, the pre-connection structure further includes a guide sleeve 3.5, the guide sleeve is disposed on the outer pressing plate of the second plugging head, the inner end of the connection sleeve extends inward and extends into the guide sleeve, the guide sleeve is in sliding fit with the connection sleeve, and the pre-connection rope is located in the guide sleeve. Thus, the stability of the pre-connection structure can be improved.
And a sealing ring is arranged between the guide sleeve and the connecting sleeve, and the guide sleeve is in sliding sealing fit with the connecting sleeve.
Further, the thickness of the rubber sealing sleeve body is 1/5-1/4 of the inner diameter of the cable channel, and particularly, the thickness of the rubber sealing sleeve body is 1/4 of the inner diameter of the cable channel. The outer side surface of the rubber seal sleeve body is provided with a plurality of annular seal bulges. So, through the contact of annular seal arch with the inner wall that compresses tightly at cable channel, realize sealed, can improve sealed effect.
Further, the number of the normal state connecting ropes is at least two, and in this embodiment, the number of the normal state connecting ropes is two, or 3, or 4. Each normal state is connected the rope and is wound the circumference evenly distributed of rubber seal cover body, and outer via hole and normal state are connected the rope one-to-one, and interior via hole and normal state are connected the rope one-to-one. Therefore, the stability of the anti-falling cable channel plugging structure in the process of sealing the port of the cable channel can be improved.
Furthermore, a sealing ring is arranged between the connecting sleeve via hole and the connecting sleeve, and the sealing ring is fixed on a sealing ring mounting groove on the inner wall of the connecting sleeve via hole.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.

Claims (9)

1.一种防脱落型电缆通道封堵结构,其特征是,包括:1. An anti-dropping cable channel blocking structure is characterized in that, comprising: 两个封堵头,两个封堵头位于电缆井的电缆通道内,其中第一个封堵头靠近电缆通道的端口,第二个封堵头位于第一个封堵头内侧的电缆通道内,所述封堵头包括内外两块压板及位于内外两块压板之间的橡胶密封套体,所述外压板上设有往外压板方向延伸的限位套,所述橡胶密封套体套设在限位套上,橡胶密封套体的一端抵在内压板上,橡胶密封套体的另一端抵在外压板上,所述限位套与外压板之间具有间隙;Two plugging heads, two plugging heads are located in the cable channel of the cable well, the first plugging head is close to the port of the cable channel, and the second plugging head is located in the cable channel inside the first plugging head , the plugging head includes two inner and outer pressure plates and a rubber sealing sleeve body located between the inner and outer two pressure plates, the outer pressure plate is provided with a limit sleeve extending in the direction of the outer pressure plate, and the rubber sealing sleeve body is sleeved on the outer plate. On the limit sleeve, one end of the rubber seal sleeve body is pressed against the inner pressure plate, the other end of the rubber seal sleeve body is pressed against the outer pressure plate, and there is a gap between the limit sleeve and the outer pressure plate; 预紧压缩弹簧,预紧压缩弹簧位于两个封堵头之间,预紧压缩弹簧的一端抵在第二个封堵头的外压板上,预紧压缩弹簧的另一端抵在第一个封堵头的内压板上;The pre-tightening compression spring is located between the two blocking heads, one end of the pre-tightening compression spring is against the outer pressure plate of the second blocking head, and the other end of the pre-tightening compression spring is against the first sealing head. On the inner pressure plate of the plug; 常态连接结构,常态连接结构包括常态连接绳,所述第一个封堵头的内压板上设有内过孔,所述第二个封堵头的外压板上设有外过孔,所述常态连接绳的内端与第二个封堵头的内压板相连接,常态连接绳的外端依次穿过外过孔和内过孔并与第二个封堵头的外压板相连接;The normal connection structure includes a normal connection rope, the inner pressure plate of the first plugging head is provided with an inner via hole, the outer pressure plate of the second plugging head is provided with an outer via hole, and the The inner end of the normal connection rope is connected with the inner pressure plate of the second plugging head, and the outer end of the normal connection rope passes through the outer through hole and the inner through hole in sequence and is connected with the outer pressure plate of the second plugging head; 预连接结构,预连接结构包括预连接绳、设置在预连接绳上的限位件及连接套,所述连接套设置在第一个封堵头的内压板上,第一个封堵头的外压板上设有连接套过孔,所述连接套的外端往外延伸并穿过连接套过孔,所述连接套的外端面上设有沿连接套的轴向延伸的轴向容纳口,所述预连接绳的内端固定在第二个封堵头的外压板上,预连接绳的外端穿过连接套的内孔,所述限位件位于连接套的外侧;所述连接套过孔与连接套之间设有密封圈,且该密封圈固定在连接套过孔的内壁的密封圈安装槽上;A pre-connection structure, the pre-connection structure includes a pre-connection rope, a limiter arranged on the pre-connection rope, and a connection sleeve, the connection sleeve is arranged on the inner pressure plate of the first plugging head, and the first plugging head has The outer pressure plate is provided with a connecting sleeve through hole, the outer end of the connecting sleeve extends outward and passes through the connecting sleeve through hole, and the outer end surface of the connecting sleeve is provided with an axial accommodating port extending along the axial direction of the connecting sleeve, The inner end of the pre-connection rope is fixed on the outer pressure plate of the second plugging head, the outer end of the pre-connection rope passes through the inner hole of the connection sleeve, and the limiting member is located outside the connection sleeve; the connection sleeve A sealing ring is arranged between the through hole and the connection sleeve, and the sealing ring is fixed on the sealing ring installation groove of the inner wall of the through hole of the connection sleeve; 当限位件在预紧压缩弹簧的作用下抵在连接套的外端面上时,预连接绳处于绷紧状态,常态连接绳处于松弛状态;When the limiter is pressed against the outer end face of the connecting sleeve under the action of the pre-tightening compression spring, the pre-connecting rope is in a tight state, and the normal connecting rope is in a relaxed state; 当靠近限位件的预连接绳移动至轴向容纳口内,且限位件位于连接套的侧壁外侧时,预连接绳处于松弛状态,常态连接绳在预紧压缩弹簧的作用下处于绷紧状态。When the pre-connection rope close to the limiter moves into the axial accommodating opening, and the limiter is located outside the side wall of the connecting sleeve, the pre-connection rope is in a relaxed state, and the normal connection rope is in a tight state under the action of the pre-tightening compression spring state. 2.根据权利要求1所述的防脱落型电缆通道封堵结构,其特征是,当预连接绳处于松弛状态,常态连接绳在预紧压缩弹簧的作用下处于绷紧状态时,两个封堵头的内外两块压板将在预紧压缩弹簧的作用下相互靠近,从而挤压内外两块压板之间的橡胶密封套体,以使橡胶密封套体的外壁压紧在电缆通道的内壁上。2. The anti-dropping cable channel plugging structure according to claim 1, characterized in that, when the pre-connection rope is in a relaxed state, and the normal connection rope is in a taut state under the action of the pre-tightening compression spring, the two seals are closed. The inner and outer two pressure plates of the plug will approach each other under the action of the preloaded compression spring, so as to squeeze the rubber sealing sleeve between the inner and outer pressure plates, so that the outer wall of the rubber sealing sleeve is pressed against the inner wall of the cable channel. . 3.根据权利要求1所述的防脱落型电缆通道封堵结构,其特征是,所述橡胶密封套体的内壁紧靠在限位套的外壁上。3 . The anti-dropping cable channel blocking structure according to claim 1 , wherein the inner wall of the rubber sealing sleeve body abuts on the outer wall of the limiting sleeve. 4 . 4.根据权利要求1或2或3所述的防脱落型电缆通道封堵结构,其特征是,所述预连接结构还包括导向套,所述导向套设置在第二个封堵头的外压板上,所述连接套的内端往内延伸并伸入导向套内,导向套与连接套滑动配合,所述预连接绳位于导向套内。4. The anti-dropping cable channel plugging structure according to claim 1, 2 or 3, wherein the pre-connection structure further comprises a guide sleeve, and the guide sleeve is arranged outside the second plugging head On the pressing plate, the inner end of the connection sleeve extends inward and into the guide sleeve, the guide sleeve and the connection sleeve are slidably matched, and the pre-connection rope is located in the guide sleeve. 5.根据权利要求4所述的防脱落型电缆通道封堵结构,其特征是,所述导向套与连接套之间还设有密封圈,导向套与连接套滑动密封配合。5 . The anti-dropping cable channel blocking structure according to claim 4 , wherein a sealing ring is further provided between the guide sleeve and the connection sleeve, and the guide sleeve and the connection sleeve are in sliding and sealing cooperation. 6 . 6.根据权利要求1或2或3所述的防脱落型电缆通道封堵结构,其特征是,所述橡胶密封套体的厚度为电缆通道的内径的1/5-1/4。6 . The anti-dropping cable channel plugging structure according to claim 1 , wherein the thickness of the rubber sealing sleeve is 1/5-1/4 of the inner diameter of the cable channel. 7 . 7.根据权利要求6所述的防脱落型电缆通道封堵结构,其特征是,所述橡胶密封套体的厚度为电缆通道的内径的1/4。7 . The anti-dropping cable channel blocking structure according to claim 6 , wherein the thickness of the rubber sealing sleeve is 1/4 of the inner diameter of the cable channel. 8 . 8.根据权利要求1或2或3所述的防脱落型电缆通道封堵结构,其特征是,所述橡胶密封套体的外侧面上设有若干道环形密封凸起。8. The anti-dropping cable channel blocking structure according to claim 1, 2 or 3, wherein a plurality of annular sealing protrusions are provided on the outer surface of the rubber sealing sleeve. 9.根据权利要求1或2或3所述的防脱落型电缆通道封堵结构,其特征是,所述常态连接绳至少为两根,各常态连接绳绕绕橡胶密封套体的周向均匀分布,所述外过孔与常态连接绳一一对应,所述内过孔与常态连接绳一一对应。9. The anti-dropping cable channel plugging structure according to claim 1, 2 or 3, wherein the number of the normal connection ropes is at least two, and each normal connection rope is evenly wound around the circumference of the rubber sealing sleeve. distribution, the outer vias correspond to the normal connecting ropes one-to-one, and the inner vias correspond to the normal connecting ropes one-to-one.
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