Pin combined type cable penetrating device

Abstract

The utility model belongs to the technical field of cable penetrating devices, and discloses a contact pin combined type cable penetrating device, which comprises a cable penetrating device main body and a straight plug inserted into the tail end of the cable penetrating device main body, and three conducting rods distributed in a triangular shape are arranged in the cable penetrating device main body. A front connector, an insulation sealing assembly, a pressing screw sleeve and a cable pressing block are sequentially arranged in the straight plug from top to bottom. Three jacks matched with the contact pins are formed in the front connector, and conductive cylinders and cable connecting contact pins are sequentially arranged in the jacks from top to bottom; compared with the prior art, through the arrangement of the straight plug, on one hand, three-phase cables are gathered in the front connector, circuit conduction can be achieved only by aligning the cable penetrating device main body with the straight plug and inserting the contact pins into the jacks, the process is simple, installation is convenient and fast, and on the other hand, the size of the straight plug can be adaptively adjusted according to the size of a well mouth; the method can be applied to different working conditions and is high in adaptability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cable crossing device technical field, concretely relates to a pin combination type cable crossing device. BACKGROUND

[0002] With the development of China's oil exploration and development, the development of offshore oil wells and low-pressure oil wells is becoming more and more intense, and the matching electric submersible pump comprehensive oil production technology has also developed rapidly. The cable crossing device is a device for penetrating the tubing hanger and the upper flange on the electric submersible pump oil well mouth, and connecting the downhole electric submersible pump and the uphole power supply. It changes the traditional cable crossing mode, and has the characteristics of good safety, high sealing, and easy operation.

[0003] In the prior art, the cable in the well is inserted into the tail end of the cable crossing device to realize the conduction of the circuit. For example, patent (CN209344744U) discloses a pin injection molded underground cable crossing device main body, which comprises a main body shell, a main body tail shell matched with the main body shell at the end of the main body shell, an insulating pin arranged in the main body shell and the main body tail shell, and a cable stripped head. An upper insulation sealing forming, a middle insulation sealing forming and a lower insulation sealing forming are sequentially arranged in the main body shell and the main body tail shell. The insulating pin is injection molded by a mold, a protrusion is arranged on the insulating pin, a sealing block is arranged between the main body shell and the insulating pin, and a pin pressing plate is arranged at the end of the sealing block. The pin pressing plate is fixed on the sealing block by bolts.

[0004] The above-mentioned patent has the advantages of simple structure, and realizes the communication of the circuit by connecting the insulating pin and the cable stripped head. However, it also has the following disadvantages: first, the main body tail shell needs to be added at the bottom end of the cable crossing device shell, which increases the length of the whole cable crossing device, and cannot be applied to small-sized wellheads; second, an insulator (such as rubber, epoxy resin, etc.) needs to be injected into the gap between one end of the cable stripped head and the main body tail shell, which makes the pouring process complicated and cannot effectively control the filling degree inside. If there are gaps or holes, it will also affect the service life of the cable; third, the insulating pin and the cable stripped head need to be connected one by one, which makes the connection process complicated and consumes a lot of time in the actual installation process, affecting the installation efficiency. SUMMARY

[0005] Therefore, the utility model intends to provide a pin combination type cable crossing device to solve the technical problem of complicated cable connection at the lower end of the cable crossing device in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a kind of pin combination type cable crossing device, including cable crossing device main body and straight plug inserted in the tail end of cable crossing device main body, 3 electrically conductive rods are arranged inside cable crossing device main body in triangle distribution, straight plug includes straight plug shell, the upper end of straight plug shell is equipped with connecting screw cap, the lower end of straight plug shell is equipped with tail shell, front connector, insulating sealing assembly, compression sleeve and cable pressing block are sequentially arranged in straight plug from top to bottom, armored cable is fixed by cable pressing block and dispersed into 3 cable lines and extends upwards;Front connector is opened with 3 insertion holes matched with pin, insertion hole is sequentially equipped with electrically conductive cylinder and cable connection pin from top to bottom, and the both ends of cable connection pin are respectively inserted with electrically conductive cylinder and cable line;

[0008] Further, the insulating sealing assembly is a split structure, which includes a first sealing plate, a second sealing plate, a third sealing plate, a fourth sealing plate, a compression sleeve and a wave-shaped elastic washer arranged in sequence from top to bottom, wherein the contact surfaces between the first sealing plate, the second sealing plate and the third sealing plate are oppositely provided with a clamping groove and a sealing protrusion, the sealing protrusion is clamped into the clamping groove to form a stable mechanical locking, and a gap is left between the sealing protrusion and the clamping groove.

[0009] Further, the first sealing plate is formed with a first through hole, the inner side of the first through hole is provided with a first cylindrical protrusion, the wall thickness of the first cylindrical protrusion gradually decreases away from the first through hole, and a ring-shaped first clamping groove is formed at the opening of the outer side of the first through hole, a second clamping groove is formed at the edge of the outer side of the first sealing plate, and the material of the first sealing plate is four-propylfluorine rubber.

[0010] Further, the second sealing plate is formed with a second through hole, the inner side of the second through hole is provided with a first sealing protrusion, and the inner edge of the second sealing plate is provided with a second sealing protrusion, the first sealing protrusion and the second sealing protrusion are clamped into the first clamping groove and the second clamping groove respectively, a third clamping groove is formed at the opening of the outer side of the second through hole, and a fourth clamping groove is formed at the edge of the outer side of the second sealing plate.

[0011] Further, the third sealing plate is formed with a third through hole, the inner side of the third through hole is provided with a third sealing protrusion, and the inner edge of the third sealing plate is provided with a fourth sealing protrusion, the third sealing protrusion and the fourth sealing protrusion are clamped into the third clamping groove and the fourth clamping groove respectively, a second cylindrical protrusion is formed at the opening of the outer side of the third through hole, the wall thickness of the second cylindrical protrusion gradually decreases away from the third through hole, and the materials of the second sealing plate and the third sealing plate are both hydrogenated butadiene-acrylonitrile rubber.

[0012] Further, the fourth sealing plate is formed with a fourth through hole, the second cylindrical protrusion is inserted into the fourth through hole, and a gap is left between the inner wall of the fourth through hole and the outer wall of the second cylindrical protrusion, deformation reservation holes are formed between adjacent fourth through holes, the deformation reservation holes constitute equilateral triangle distribution, and the fourth sealing plate is made of polyether ether ketone.

[0013] Further, the sealing ring is integrally formed on the side surface of the first sealing plate, the second sealing plate and the third sealing plate, and is used for sealing between the sealing plate and the straight plug shell.

[0014] Further, the cable pressing blocks are located at the tail end of the tail shell, and a space for accommodating the flat armored cable is formed between the two oppositely arranged cable pressing blocks.

[0015] Further, the length of the conductive cylinder is less than that of the front connector, and the conductive cylinder is located inside the front connector.

[0016] Further, the cable connecting pin comprises a pin head and a pin tail, the pin head is inserted into the second accommodating space, a threaded hole is formed at the center position of the end surface of the free end of the pin head along the length direction of the pin head, the head of the connecting screw is located in the first accommodating space, the shank of the connecting screw passes through the communication hole and enters the second accommodating space and is threadedly connected with the pin head, the pin tail is located outside the conductive cylinder and the outer wall of the pin tail is in contact with the inner wall of the front connector, a connecting groove is formed at the center position of the end surface of the end of the pin tail away from the pin head, a cable stripping head is formed at the free end of the cable wire, and the cable stripping head is inserted into the connecting groove.

[0017] The utility model has the advantages that:

[0018] Compared with the prior art, the compression screw is moved towards the insulation sealing assembly by rotating the compression screw, the insulation sealing assembly is extruded to realize sealing, and the installation of the whole straight plug is completed. By arranging the straight plug, on one hand, the three-phase cable is gathered in the front connector, and the circuit conduction can be realized by only passing the cable through the cable through device main body and the straight plug and inserting the pin into the plug hole, the process is simple, and the installation is convenient; on the other hand, the size of the straight plug can be adaptively adjusted according to the wellhead size, can be applied to different working conditions, and is high in adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the purpose, technical scheme and beneficial effects of the utility model more clear, the utility model provides the following drawings for description:

[0020] Figure 1 It is a sectional view of the cable through device main body in the utility model embodiment one;

[0021] Figure 2 It is a sectional view of the straight plug in the utility model embodiment one;

[0022] Figure 3 It is Figure 2Enlarged view at A1;

[0023] Figure 4 The schematic view of the first sealing plate in the embodiment one of the utility model;

[0024] Figure 5 The schematic view of the second sealing plate in the embodiment one of the utility model, for showing the first sealing protrusion and the second sealing protrusion;

[0025] Figure 6 The schematic view of the second sealing plate in the embodiment one of the utility model, for showing the third clamping slot and the fourth clamping slot;

[0026] Figure 7 The schematic view of the third sealing plate in the embodiment one of the utility model, for showing the third sealing protrusion and the fourth sealing protrusion;

[0027] Figure 8 The schematic view of the third sealing plate in the embodiment one of the utility model, for showing the second cylindrical protrusion;

[0028] Figure 9 The schematic view of the fourth sealing plate in the embodiment one of the utility model;

[0029] Figure 10 The schematic view of the pressing sleeve in the embodiment one of the utility model.

[0030] The marks in the drawing are as follows:

[0031] Cable crossing device main body 1, main body shell 11, conductive rod 12, pin 13, straight plug 2, straight plug shell 201, connecting screw cap 202, tail shell 203, front joint 204, lip seal ring 2041, jack 2042, insulation sealing assembly 205, first sealing plate 2051, first through hole 212, first cylindrical protrusion 213, first clamping slot 214, second clamping slot 215, second sealing plate 2052, second through hole 216, first sealing protrusion 217, second sealing protrusion 218, third clamping slot 219, fourth clamping slot 220, third sealing plate 2053, third through hole 221, third sealing protrusion 222, fourth sealing protrusion 223, second cylindrical protrusion 224, fourth sealing plate 2054, fourth through hole 225, deformation reserved hole 226, pressing sleeve 2055, wave-shaped elastic washer 2056, pressing screw sleeve 206, cable pressing block 207, armored cable 208, cable wire 2081, conductive cylinder 209, first containing space 2091, second containing space 2092, communication hole 2093, cable connecting pin 210, needle head 2101, needle tail 2102, connecting groove 2103, connecting screw 211. DETAILED DESCRIPTION

[0032] Embodiment one, see specificallyFigures 1-10 .

[0033] A pin combination cable crossing device, comprising a cable crossing device body 1 and a straight plug 2 plugged at the tail end of the cable crossing device body 1.

[0034] As shown in Figure 1 , the cable crossing device body 1 comprises a body shell 11, and three conductive rods 12 are arranged inside the body shell 11 in an equilateral triangle shape. The two ends of the conductive rods 12 are provided with pins 13. The structure of the cable crossing device body 1 is a prior art, and will not be described in detail here.

[0035] The straight plug 2 comprises a straight plug shell 201 with open ends and a hollow interior. The upper end of the straight plug shell 201, i.e. the end facing the cable crossing device body 1, is provided with a connecting screw cap 202. It is worth noting that the upper end of the straight plug shell 201 is formed with a step, the inner wall of the connecting screw cap 202 is in contact with the step surface, and the connecting screw cap 202 is limited by the step surface. A plurality of first fixing holes are uniformly arranged on the step surface of the straight plug shell 201 in the circumferential direction. The depth of the first fixing hole is smaller than the wall thickness of the straight plug shell 201, and the first fixing hole is provided with a thread. The lower end of the connecting screw cap 202 is provided with a threaded hole matched with the first fixing hole, and the first fixing screw is arranged in the threaded hole to fixedly connect the connecting screw cap 202 and the straight plug shell 201.

[0036] The lower end of the straight plug shell 201 is provided with a tail shell 203, which is also open at both ends and has a hollow interior. The tail shell 203 is sleeved on the periphery of the straight plug shell 201. The straight plug shell 201 is provided with a second fixing hole, and the second fixing screw passes through the tail shell 203 and is deeply inserted into the second fixing hole, thereby realizing the fixed connection of the straight plug shell 201 and the tail shell 203.

[0037] The straight plug 2 is sequentially provided with a front connector 204, an insulating sealing assembly 205, a compression sleeve 206 and a cable pressing block 207 from top to bottom along the height direction. The armored cable 208 is fixed by the cable pressing block 207 and is dispersed into three cable lines 2081 extending upward. Figure 1 As shown in , the lower section of the front connector 204 is threadedly connected with the straight plug shell 201 to realize the fixation of the two; the middle section of the front connector 204 is provided with two O-ring sealing structures with the straight plug shell 201 to ensure the sealing between the front connector 204 and the straight plug shell 201; the upper section of the front connector 204 is provided with a lip seal ring 2041 between the front connector 204 and the connecting screw cap 202. The lip seal ring 2041 is deformed by extrusion to realize the sealing between the front connector 204 and the connecting screw cap 202.

[0038] The outer diameter of the upper section of the front connector 204 is smaller than the inner diameter of the opening of the connecting end of the connecting screw cap 202, the inner wall of the connecting end of the connecting screw cap 202 is provided with internal threads, and the outer wall of the lower end of the main body shell 11 is provided with external threads, so that the main body 1 of the cable crossing device and the straight plug 2 are fixedly connected through the internal threads and the external threads.

[0039] The front connector 204 is internally provided with three insertion holes 2042 matched with the insertion pins 13, the insertion holes 2042 are sequentially provided with a conductive cylinder 209 and a cable connecting pin 210 from top to bottom, and the cable connecting pin 210 is respectively inserted with the conductive cylinder 209 and the cable wire 2081 at both ends. The length of the conductive cylinder 209 is smaller than the length of the front connector 204, and the conductive cylinder 209 is located inside the front connector 204. The upper end of the conductive cylinder 209 is provided with a cylindrical first accommodating space 2091, the cross-sectional dimension of the first accommodating space 2091 is consistent with the cross-sectional dimension of the insertion pin 13, and the opening of the first accommodating space 2091 is expanded outward, so as to facilitate the alignment of the insertion pin 13. The first accommodating space 2091 is provided with an elastic electrode ring, which increases the contact area between the insertion pin 13 and the front connector 204, thereby enhancing the contact stability and conductivity between them.

[0040] The lower end of the conductive cylinder 209 is also provided with a cylindrical second accommodating space 2092, and the first accommodating space 2091 and the second accommodating space 2092 are connected through a communication hole 2093. It should be emphasized that the axes of the conductive cylinder 209, the first accommodating space 2091, the second accommodating space 2092 and the communication hole 2093 coincide, and the inner diameters of the first accommodating space 2091 and the second accommodating space 2092 are both larger than the inner diameter of the communication hole 2093.

[0041] The cable connecting pin 210 includes a cylindrical needle head 2101 and a cylindrical needle tail 2102 as shown in the drawing, the diameter of the needle head 2101 is smaller than the diameter of the needle tail 2102, and the axes of the two coincide, and the needle head 2101 is inserted into the second accommodating space 2092. Figure 3 A threaded hole is formed in the center of the end face of the free end of the needle head 2101 along the length direction of the needle head 2101, the head of the connecting screw 211 is located in the first accommodating space 2091, the shank of the connecting screw 211 passes through the communication hole 2093 into the second accommodating space 2092 and is threadedly connected with the needle head 2101, and the head of the connecting screw 211 abuts against the bottom surface of the first accommodating space 2091. The cable connecting pin 210 and the conductive cylinder 209 are fixedly connected through the connecting screw 211, so as to prevent the needle head of the cable connecting pin 210 from falling off from the second accommodating space 2092, and in addition, the second accommodating space 2902 is also provided with an elastic electrode ring.

[0042] The needle tail 2102 is located outside the conductive barrel 209, and the outer wall of the needle tail 2102 is in contact with the inner wall of the front connector 204. A connecting groove 2103 is formed at the position away from the center of the end face of the needle tail 2102. The depth of the connecting groove 2103 is smaller than the length of the needle tail 2102. The free end of the cable 2081 is formed with a cable stripping head, and the cable stripping head is inserted into the connecting groove 2103. A third fixing hole is formed in the side surface of the needle tail 2102, and a third fixing screw is screwed into the third fixing hole to press and fix the cable stripping head. In addition, the needle tail 2102 is also provided with an O-ring sealing structure for sealing between the needle tail 2102 and the front connector 204.

[0043] Since the cable connecting plug 210 is used for power transmission, a sealing assembly needs to be arranged at the tail end of the needle tail 2102. The sealing assembly is deformed by being pressed by the compression sleeve 206, so as to realize insulation sealing of the tail end of the needle tail 2102. On the one hand, it can prevent current leakage and reduce the risk of circuit short circuit. On the other hand, it can prevent moisture, gas and other foreign matters in the external environment from entering the inside of the straight plug 2 through the gap around the cable connecting plug 210, causing erosion and damage of the internal structure of the straight plug 2. In the prior art, the sealing assembly usually adopts an integral cylindrical sealing member. In the process of extrusion deformation, the deformation of the sealing member mainly comes from the deformation of the material itself, that is, the material of the sealing member becomes a key factor affecting the insulation sealing effect. In addition, the external force acts on the end of the sealing member, and the deformation amount of the sealing member in the length direction is constantly changing, resulting in local differentiation of the sealing effect. Specifically, the deformation of the force side is obviously larger than that of the side away from the force side.

[0044] Based on this, in the present embodiment, the insulation sealing assembly 205 is a split structure and is sleeved around the three cables 2081. It includes a first sealing plate 2051, a second sealing plate 2052, a third sealing plate 2053, a fourth sealing plate 2054, a compression sleeve 2055 and a wave-shaped elastic washer 2056 arranged from top to bottom. The contact surfaces between the first sealing plate 2051, the second sealing plate 2052 and the third sealing plate 2053 are provided with a clamping groove and a sealing protrusion in opposite positions. The protrusion is embedded in the clamping groove to form a stable mechanical lock.

[0045] As Figure 1As shown, the first sealing plate 2051 is formed with three first through holes 212 for passing the cable 2081, and the first through holes 212 are integrally formed with first cylindrical protrusions 213 on the side (i.e. the inner side) facing the conductive cylinder 209, and the wall thickness of the first cylindrical protrusions 213 gradually decreases in the direction away from the first through holes 212. Since the cable connecting pin 210 is located inside the front connector 204, a cylindrical gap is left between the tail of the cable connecting pin 210 and the tail of the front connector 204, and the first cylindrical protrusions 213 are just inserted into the gap to achieve sealing. Especially under the extrusion of external force, the first cylindrical protrusions 213 are deformed radially to expand, and the sealing effect is further enhanced. In this embodiment, the material of the first sealing plate 2051 is AFLAS (tetrafluoroethylene propylene rubber), which has excellent compression permanent deformation resistance in high temperature environment.

[0046] The first through holes 212 are provided with first clamping grooves 214 on the outer side, and the first clamping grooves 214 are annular, with the outer diameter remaining unchanged and the inner diameter gradually increasing from outside to inside and the initial inner diameter being consistent with the inner diameter of the first through holes 212. The edge of the outer side of the first sealing plate 2051 is provided with second clamping grooves 215, which are also annular, with the inner diameter remaining unchanged and the outer diameter gradually decreasing from outside to inside and the initial outer diameter being consistent with the diameter of the first sealing plate 2051.

[0047] The second sealing plate 2052 is formed with three second through holes 216 for passing the cable 2081, and the second through holes 216 are integrally formed with first sealing protrusions 217 on the side (i.e. the inner side) facing the first sealing plate 2051, and the inner edge of the second sealing plate 2052 is integrally formed with second sealing protrusions 218, the first sealing protrusions 217 and the second sealing protrusions 218 are respectively inserted into the first clamping grooves 214 and the second clamping grooves 215, and the shapes and structures of the first sealing protrusions 217 and the second sealing protrusions 218 are matched with those of the first clamping grooves 214 and the second clamping grooves 215.

[0048] The second through holes 216 are provided with third clamping grooves 219 on the outer side, and the shapes and structures of the third clamping grooves 219 are the same as those of the first clamping grooves 214, which will not be described again; the edge of the outer side of the second sealing plate 2052 is provided with fourth clamping grooves 220, and the shapes and structures of the fourth clamping grooves 220 are the same as those of the second clamping grooves 215, which will not be described again.

[0049] The third sealing plate 2053 is formed with three third through holes 221 for passing the cable 2081, the third through holes 221 are integrally formed with third sealing protrusions 222 on the side (i.e. the inner side) of the second sealing plate 2052, the fourth sealing protrusions 223 are integrally formed on the edge of the inner side of the third sealing plate 2053, the third sealing protrusions 222 and the fourth sealing protrusions 223 are matched with the shapes and structures of the third clamping groove 219 and the fourth clamping groove 220 respectively, and the third sealing protrusions 222 and the fourth sealing protrusions 223 are clamped into the third clamping groove 219 and the fourth clamping groove 220 respectively.

[0050] The second cylindrical protrusion 224 is arranged at the opening of the third through hole 221, the second cylindrical protrusion 224 is integrally formed with the third sealing plate 2053, and the wall thickness of the second cylindrical protrusion 224 gradually decreases in the direction away from the third through hole 221.

[0051] It is emphasized that the materials of the second sealing plate 2052 and the third sealing plate 2053 are hydrogenated styrene butadiene rubber in the embodiment, which has excellent performance, such as excellent corrosion resistance, wear resistance, compression permanent deformation resistance and the like. In addition, the sealing rings are integrally formed on the side surfaces of the first sealing plate 2051, the second sealing plate 2052 and the third sealing plate 2053, the cross sections of the sealing rings are arc surfaces, and the sealing rings are used for sealing between the sealing plates and the straight plug shell 201.

[0052] The fourth sealing plate 2054 is formed with three fourth through holes 225 for passing the cable 2081, the second cylindrical protrusion 224 is inserted into the fourth through hole 225, and there is a gap between the inner wall of the fourth through hole 225 and the outer wall of the second cylindrical protrusion 224. The deformation reserved holes 226 are arranged between the adjacent fourth through holes 225, and the three deformation reserved holes 226 also form an equilateral triangle distribution. It is worth further explaining that the fourth sealing plate 2054 is made of polyether ether ketone (PEEK) in the embodiment, which has a certain rigidity, and can ensure a certain degree of deformation in the inside under the action of external force through the deformation reserved holes 226, so as to prevent the fourth sealing plate 2054 from being broken.

[0053] The compression sleeve 2055 is hollow, the wave-shaped elastic gasket 2056 is arranged between the compression sleeve 2055 and the compression screw sleeve 206, the wave-shaped elastic gasket 2056 can not only absorb vibration and impact, but also effectively adjust the pre-tightening force of the compression screw sleeve 206. Figure 2 As shown in the figure, the inner wall of the tail end of the front connector 204 is provided with an internal thread, the outer wall of the compression screw sleeve 206 is provided with an external thread matched with the internal thread, and the compression screw sleeve 206 is in threaded connection with the front connector 204.

[0054] The cable pressing block 207 is located at the tail end of the tail shell 203, and it is emphasized that spaces for accommodating the flat armored cable 208 are formed between the two oppositely arranged cable pressing blocks 207. The cable pressing block 207 is fixed with the tail shell 203 by screws, and the cable pressing block 207 and the armored cable 208 are also fixed by screws. The screws pass through the tail shell 203 and the cable pressing block 207.

[0055] After the above-mentioned parts are preliminarily installed and formed, the compression sleeve 206 is rotated to move the compression sleeve 206 towards the insulation sealing assembly 205, the insulation sealing assembly 205 is extruded to realize sealing, and the installation of the entire straight plug 2 is completed. By arranging the straight plug 2, on the one hand, the three-phase cable is collected in the front connector 204, and only the cable traverser body 1 and the straight plug 2 are needed to pass through the cable and insert the pin 13 into the insertion hole 2042 to realize the conduction of the circuit, the process is simple and convenient to install. On the other hand, the size of the straight plug 2 can be adaptively adjusted according to the size of the wellhead, and can be applied to different working conditions, and has strong adaptability.

[0056] In addition, by adopting the split type insulation sealing assembly 205, the insulation sealing assembly 205 is extruded and deformed under the action of external force. The deformation is not only caused by the material itself, but also mainly caused by the structural deformation between different sealing plates, especially the mutual extrusion of the second sealing plate 2052 and the first sealing plate 2051 and the third sealing plate 2053 on the structure surface. Specifically, the sealing protrusions are clamped into the oppositely arranged clamping grooves to form stable mechanical locking. There is a gap between the sealing protrusions and the clamping grooves. The cooperation of the protrusions and the clamping grooves not only provides structural fixation, but also uses the elastic deformation of the material to fill the small gap, thereby realizing good sealing effect without using any adhesive.

[0057] Compared with the local difference of the deformation degree of the integrally formed sealing member caused by the material itself, the structural deformation of the split type sealing member can make the overall deformation of the sealing member more uniform, and can bring greater deformation and provide more excellent insulation sealing effect. In the embodiment, the extrusion deformation of the first sealing plate 2051, the second sealing plate 2052 and the third sealing plate 2053 can prevent the contact between the external gas, moisture and the cable connection pin 210, the conductive cylinder 209 and other related conductive parts, especially against the high pressure environment formed by the well blowout. The second is to protect and buffer the internal cable wire 2081, and ensure the normal use of the cable wire 2081.

[0058] It is worth mentioning that when the compression sleeve 206 is screwed in, the compression sleeve 2055 is driven to rotate synchronously due to the friction of the contact surface. When the compression sleeve 2055 directly contacts the third sealing plate 2053, the contact surface of the third sealing plate 2053 made of flexible material is relatively rough, so that the third sealing plate 2053 is deformed under the friction of the compression sleeve 2055, thereby affecting the sealing effect. Therefore, the fourth sealing plate 2054 is arranged between the third sealing plate 2053 and the compression sleeve 2055, the fourth sealing plate 2054 is made of engineering plastic polyether ether ketone, the surface of which is smooth and has a certain hardness, the compression sleeve 2055 and the fourth sealing plate 2054 are in smooth contact, the fourth sealing plate 2054 will not rotate with the compression sleeve 2055 and uniformly transmit the external force to the third sealing plate 2053.

[0059] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. A pin-type cable pass-through device, characterized in that, The device includes a cable runner body and a straight plug inserted into the tail end of the cable runner body. The cable runner body has three conductive rods arranged in a triangle. The straight plug includes a straight plug housing, with a connecting screw cap at the upper end and a tail housing at the lower end. Inside the straight plug, from top to bottom, there are a front connector, an insulation sealing component, a clamping screw sleeve, and a cable clamping block. The armored cable is fixed by the cable clamping block and distributed into three cable lines extending upwards. The front connector has three insertion holes that match the pins. In each insertion hole, from top to bottom, there are conductive cylinders and cable connection pins. The two ends of the cable connection pins are respectively inserted into the conductive cylinders and the cable lines.

2. The pin-type cable pass-through device according to claim 1, characterized in that, The insulating sealing assembly is a split structure, which includes a first sealing plate, a second sealing plate, a third sealing plate, a fourth sealing plate, a compression sleeve, and a wave elastic washer arranged sequentially from top to bottom. The contact surfaces of the first sealing plate, the second sealing plate, and the third sealing plate are provided with grooves and sealing protrusions facing each other. The sealing protrusions are engaged in the grooves to form a stable mechanical lock, and a gap is left between the sealing protrusions and the grooves.

3. The pin-type cable pass-through device according to claim 2, characterized in that, A first through hole is formed on the first sealing plate. A first cylindrical protrusion is provided on the inner side of the first through hole. The wall thickness of the first cylindrical protrusion gradually decreases in the direction away from the first through hole. An annular first groove is provided at the outer opening of the first through hole. A second groove is provided at the edge of the outer side of the first sealing plate. The material of the first sealing plate is tetrafluoroethylene rubber.

4. The pin-type cable pass-through device according to claim 3, characterized in that, A second through hole is formed on the second sealing plate. A first sealing protrusion is provided on the inner side of the second through hole. A second sealing protrusion is provided at the inner edge of the second sealing plate. The first sealing protrusion and the second sealing protrusion are respectively inserted into the first slot and the second slot. A third slot is provided at the outer opening of the second through hole. A fourth slot is provided at the edge of the outer side of the second sealing plate.

5. The pin-type cable pass-through device according to claim 4, characterized in that, A third through hole is formed on the third sealing plate, and a third sealing protrusion is provided on the inner side of the third through hole. A fourth sealing protrusion is provided at the inner edge of the third sealing plate. The third sealing protrusion and the fourth sealing protrusion are respectively inserted into the third slot and the fourth slot. A second cylindrical protrusion is provided at the outer opening of the third through hole. The wall thickness of the second cylindrical protrusion gradually decreases in the direction away from the third through hole. The materials of the second sealing plate and the third sealing plate are both hydrogenated nitrile rubber.

6. The pin-type cable pass-through device according to claim 5, characterized in that, A fourth through hole is formed on the fourth sealing plate, and the second cylindrical protrusion is inserted into the fourth through hole with a gap between the inner wall of the fourth through hole and the outer wall of the second cylindrical protrusion. Deformation reserved holes are opened between adjacent fourth through holes, and the deformation reserved holes are distributed in an equilateral triangle. The fourth sealing plate is made of polyetheretherketone.

7. The pin-type cable pass-through device according to claim 6, characterized in that, The first, second, and third sealing plates all have integrally formed sealing rings on their sides for sealing between the sealing plates and the straight plug housing.

8. The pin-type cable pass-through device according to claim 7, characterized in that, The cable clamp is located at the tail end of the tail housing. The space between the two cable clamps arranged vertically opposite each other is used to accommodate the flat armored cable. The cable clamp is fixed to the tail housing with screws, and the cable clamp is fixed to the armored cable with screws.

9. The pin-type cable pass-through device according to claim 1 or 8, characterized in that, The length of the conductive tube is less than the length of the front connector and the conductive tube is located inside the front connector. The upper end of the conductive tube has a first receiving space with an outwardly flared opening to facilitate the alignment of the pin. The lower end of the conductive tube has a second receiving space, and the first receiving space and the second receiving space are connected by a connecting hole.

10. The pin-type cable passer according to claim 9, characterized in that, The cable connector includes a needle head and a needle tail. The needle head is inserted into the second receiving space. A threaded hole is provided at the center of the free end face of the needle head along the length of the needle head. The head of the connecting screw is located in the first receiving space, and its shaft passes through the connecting hole into the second receiving space and is threadedly connected to the needle head. The needle tail is located outside the conductive cylinder and the outer wall of the needle tail contacts the inner wall of the front connector. A connecting groove is provided at the center of the end face of the needle tail away from the needle head. A cable stripping head is formed at the free end of the cable and is inserted into the connecting groove.

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