A cable-passing throttling device

Abstract

The present invention discloses a cable-passing throttling device, which comprises: a cylinder body, an adjusting screw, a valve core component, a bracket and a seal. Among them, the valve core component, the bracket and the seal are located inside the cylinder body. The valve core component and the seal are installed on the bracket, the bracket is connected with the adjusting screw, and the adjusting screw is fixed on the cylinder body; the valve core component includes: blades, a fixed seat, a connecting rod, a limit seat and a transmission shaft. The fixed seat is connected to the blades through the transmission shaft, the blades are connected to the connecting rod through the transmission shaft, and the connecting rod is connected to the limit seat through the transmission shaft. The present invention can assist in realizing the normal laying and recovery of optical cables in pressurized pipelines.

Description

Technical Field

[0001] The present invention relates to the field of laying cables under pressure in pipelines, and particularly to a cable-passing throttling device. Background Art

[0002] Using a distributed optical fiber system to monitor the operating status of a water conveyance pipeline throughout its life cycle has been increasingly favored in the field of pipeline monitoring. When using a distributed optical fiber system on a water conveyance pipeline, it is necessary to lay the optical cable along the pipeline. Theoretically, it can be laid either outside or inside the pipeline. However, in practice, most pipelines have already been put into use and it is impossible to lay the cable outside the pipeline after excavation. Therefore, laying the cable inside the pipeline has become the most ideal alternative.

[0003] The most intractable problem faced in laying the cable inside the pipeline is how to lay the optical cable inside a pipeline that is operating under pressure normally. Based on this problem, a series of possible technical solutions have been proposed. Summary of the Invention

[0004] The present invention provides a cable-passing throttling device, which can assist in realizing the normal placement, laying, and recovery of an optical cable inside a pressurized pipeline. The details are described as follows:

[0005] A cable-passing throttling device, the device comprising: a cylinder body, an adjusting screw, a valve core component, a bracket, and a seal;

[0006] Wherein, the valve core component, the bracket, and the seal are located inside the cylinder body. The valve core component and the seal are installed on the bracket, the bracket is connected to the adjusting screw, and the adjusting screw is fixed on the cylinder body;

[0007] The valve core component comprises: a blade, a fixed seat, a connecting rod, a limiting seat, and a transmission shaft. The fixed seat is connected to the blade through the transmission shaft, the blade is connected to the connecting rod through the transmission shaft, and the connecting rod is connected to the limiting seat through the transmission shaft.

[0008] Wherein, the outer shape of the cylinder body is a cylindrical structure, and necking interfaces are provided at both ends for connecting to the optical cable interfaces placed in the pipeline;

[0009] A chamber is provided inside the cylinder body. A protruding limiting groove is provided above the chamber for limiting the movement of the valve core component, and a first fixing hole for fixing the adjusting screw is provided below the chamber.

[0010] Further, the blade is provided with a sealing surface, a throttling surface, a cross beam, a first shaft hole, a second shaft hole, and an end surface. The sealing surface and the throttling surface are symmetrical to each other;

[0011] The outer shape of the sealing surface is conical, and the cross-section of the outer surface of the throttling surface is spiral-shaped, and the center of the spiral line coincides with the center of the second shaft hole.

[0012] Among them, the first shaft hole is connected to the connection hole on the fixed seat through a transmission shaft. The other end of the fixed seat is provided with two threaded holes for fixing the valve core component on the bracket. The first shaft hole on the blade is connected to the third fixing hole of the connecting rod, and the other end of the connecting rod, the second fixing hole, is connected to the fourth fixing hole on the limit seat. The limit seat is further provided with a sliding groove and a guiding groove. The sliding groove enables the limit seat to slide on the bracket, and the guiding groove is fixed in the limit groove on the cylinder body.

[0013] Further, the outer shape of the bracket is cylindrical, and it is provided with a support plate, fixing holes, a sliding rail, a cavity, a cantilever beam, and a driving hole. The support plates are circularly arrayed along the edge of the bracket. The bottom of each support plate is provided with a fifth fixing hole for installing the fixed seat on the valve core component. There is a gap between two support plates to enable the limit seat on the valve core component to slide up and down along the sliding rail. The cavity is located at the bottom of the bracket for installing the seal. Below the cavity, there are a cantilever beam and a driving hole. The driving hole is used to connect with the adjusting screw.

[0014] Among them, the seal is provided with a support ring and a sealing concave edge. The seal is installed in the cavity on the bracket. The support ring on the seal fills the cavity, and the sealing concave edge fits with the throttling surface on the blade.

[0015] The beneficial effects of the technical solution provided by the present invention are:

[0016] 1. This cable-passing throttling device seals the optical cable during the laying process of the optical cable, preventing high-pressure fluid in the pipe from spraying outside the pipe;

[0017] 2. The opening and closing radius of this cable-passing throttling device is large, allowing other devices to pass through its central hole during the cable laying operation, such as a placement guide pipe and a recovery rod;

[0018] 3. This cable-passing throttling device, combined with the structure of multiple valve core components, each valve core component can work independently, and also provides a high-strength sealing surface, which can not only resist the high-pressure pipeline environment but also give a reliable and stable pre-tightening force to the optical cable;

[0019] 4. This cable-passing throttling device has a compact mechanical structure. Compared with traditional rubber seals, the device of the present invention has high reliability and long service life, and can be used for cable passing in pressurized pipelines for a long time;

[0020] 5. This cable-passing throttling device is designed with a conical design for the blade sealing surface on the valve core component and a spiral linear design for the throttling surface, achieving better sealing and clamping effects on the optical cable. Description of the Drawings

[0021] Figure 1 It is a structural diagram of a cable-passing throttling device;

[0022] Figure 2 It is a structural diagram of the cylinder body;

[0023] Figure 3 is the structural schematic diagram of the valve core component;

[0024] Figure 4 is the structural diagram of the blade;

[0025] Figure 5 is the structural diagram of the bracket;

[0026] Figure 6 is the installation schematic diagram of the valve core component;

[0027] Figure 7 is the schematic diagram of the seal;

[0028] Figure 8 is the working schematic diagram of a cable-passing throttling device;

[0029] Figure 9 is the usage schematic diagram of a cable-passing throttling device.

[0030] In the attached drawings, the list of components represented by each label is as follows:

[0031] 1: Cylinder body; 10: Interface; 11: Limit groove;

[0032] 12: First fixing hole; 13: Chamber; 2: Adjusting screw;

[0033] 3: Valve core component; 30: Blade; 300: Sealing surface;

[0034] 301: Throttling surface; 302: Cross beam; 303: First shaft hole;

[0035] 304: Second shaft hole; 305: End surface; 31: Fixed seat;

[0036] 310: Connecting hole; 311: Threaded hole; 32: Connecting rod;

[0037] 320: Second fixing hole; 321: Third fixing hole; 33: Limit seat;

[0038] 330: Guide groove; 331: Slide groove; 332: Fourth fixing hole;

[0039] 34: Transmission shaft; 4: Bracket; 40: Support plate;

[0040] 41: Fifth fixing hole; 42: Slide rail; 43: Cavity;

[0041] 44: Cantilever beam; 45: Driving hole; 5: Seal;

[0042] 50: Support ring; 51: Sealing concave edge; 6: Optical cable. Detailed Implementation Modes

[0043] To make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the implementation modes of the present invention in detail.

[0044] When laying an optical cable under pressure, first determine the positions for laying and retrieving the optical cable. It is necessary to open laying and retrieving holes at the corresponding positions. Since the retrieving hole needs to be sealed during the laying and retrieving process, a device for throttling the optical cable is required. This device can prevent the leakage of the fluid in the pipe without damaging the optical cable, and can support and prevent loosening of the optical cable (prevent the optical cable in the pipe from becoming more and more loose over time) after the optical cable is laid.

[0045] To overcome the problems encountered during the operation of laying an optical cable under pressure in a pipe, refer to Figure 1 , an embodiment of the present invention provides a cable-passing throttling device, including: a cylinder body 1, an adjusting screw 2, a valve core component 3, a bracket 4 and a seal 5.

[0046] Among them, the valve core component 3, the bracket 4 and the seal 5 are located inside the cylinder body 1. The valve core component 3 and the seal 5 are installed on the bracket 4. The bracket 4 is connected to the adjusting screw 2, and the adjusting screw 2 is fixed on the cylinder body 1.

[0047] As Figure 2 shown, the outer shape of the cylinder body 1 is a cylindrical structure, and necked-down interfaces 10 are provided at both ends for connecting to the optical cable interfaces placed in the pipeline. A chamber 13 is provided inside the cylinder body 1. A raised limit groove 11 is provided above the chamber 13 for limiting the movement of the valve core component 3, and a first fixing hole 12 for fixing the adjusting screw 2 is provided below the chamber 13.

[0048] Figure 3 The structure diagram of the valve core component 3 is given in

[0049] As Figure 4 shown, the blade 30 is provided with a sealing surface 300, a throttling surface 301, a cross beam 302, a first shaft hole 303, a second shaft hole 304 and an end surface 305. The sealing surface 300 and the throttling surface 301 are symmetrical to each other; the sealing surface 300 is conical in shape, and the cross section of the outer surface of the throttling surface 301 is spiral-shaped, and the center of the spiral line coincides with the center of the second shaft hole 304.

[0050] When the blade 30 rotates relative to the second shaft hole 304, the sealing surfaces 300 on two adjacent valve core components 3 can closely fit to achieve sealing. Since the throttling surface 301 is spiral, it ensures that the contact range between the sealing surfaces 300 gradually increases when the blade 30 rotates around the shaft hole 304, and finally meets at the end surface 305 (i.e., a small arc at the end of the throttling surface 301). The end surface 305 is arc-shaped to prevent scratching the optical cable 6 during closing. The first shaft hole 303 is connected to the connection hole 310 on the fixed seat 31 through the transmission shaft 34. The other end of the fixed seat 31 is provided with two threaded holes 311 for fixing the valve core component 3 on the bracket 4. The first shaft hole 303 on the blade 30 is connected to the third fixing hole 321 of the connecting rod 32, and the other end of the connecting rod 32, the second fixing hole 320, is connected to the fourth fixing hole 332 on the limit seat 33. The limit seat 33 is further provided with a sliding groove 331 and a guiding groove 330. The sliding groove 331 enables the limit seat 33 to slide on the bracket 4, and the guiding groove 330 is fixed in the limit groove 11 on the cylinder body 1. Its function is to cause relative movement between the limit seat 33 and the fixed seat 31 on the valve core component 3 when the cylinder body 1 and the bracket 4 move relative to each other, realizing a motion mode similar to that of a crank-slider mechanism.

[0051] As Figure 5 shown, the outer shape of the bracket 4 is cylindrical, and it is provided with a support plate 40, a fixing hole 41, a slide rail 42, a cavity 43, a cantilever beam 44, and a driving hole 45. The support plates 40 are circularly arrayed along the edge of the bracket 4, and the quantity can be determined according to the usage quantity of the valve core component 3. For example: in the embodiment of the present invention, the valve core component 3 adopted is 16, so the bracket 4 is also provided with 16 support plates 40. The bottom of each support plate 40 is provided with a fifth fixing hole 41 for installing the fixed seat 31 on the valve core component 3. There is a gap between two support plates 40, that is, the slide rail 42, for enabling the limit seat 33 on the valve core component 3 to slide up and down along the slide rail 42, as Figure 6 shown. The cavity 43 is located at the bottom of the bracket 4 for installing the seal 5. Below the cavity 43, there are a cantilever beam 44 and a driving hole 45. The driving hole 45 is used to connect with the adjusting screw 2. When the adjusting screw 2 rotates, the cantilever beam 44 will drive the entire bracket 4 to move up and down relative to the cylinder body 1.

[0052] Among them, in specific implementation, the embodiment of the present invention does not limit the quantities of the bracket 4, the support plate 40, the valve core component 3 and other devices, and can be set according to the needs in actual applications.

[0053] Figure 7 shows the structural form of the seal 5, which is provided with a support ring 50 and a sealing concave edge 51. The seal 5 is installed in the cavity 43 on the bracket 4, and the installation method is as Figure 8As shown, the support ring 50 on the seal 5 just fills the cavity 43, and the sealing concave edge 51 fits against the throttling surface 301 on the blade 30 to achieve a sealing effect.

[0054] During operation, the opening and closing of the valve core component 3 are controlled by rotating the adjusting screw 2. From the open state (see Figure 8 ), to the closed state (see Figure 1 ), and then from the closed state to the open state, only by rotating the adjusting screw 2 can it be completed. The specific process is as follows: When the adjusting screw 2 is rotated, the driving hole 45 on the cantilever beam 44 will move up and down along the adjusting screw 2, thereby driving the entire bracket 4 to move. The bracket 4 slides up and down in the cylinder body 1, driving the fixed seat 31 connected thereto to move together. Since the limiting seat 33 at the other end of the valve core component 3 is stuck in the limiting groove 11 on the cylinder body 1, the limiting seat 33 is relatively stationary with respect to the cylinder body 1 and moves in the opposite direction with respect to the bracket 4. For the valve core component 3 as a whole, the limiting seat 33 moves relative to the fixed seat 31, driving the blade 30 to rotate around the fixed seat 31 through the connecting rod 32, that is, the opening and closing actions are realized.

[0055] Figure 9 Figure shows the schematic diagram of the throttling device when fixing the optical cable 6. When it is necessary to lay or retrieve the optical cable 6, the blade 30 is controlled to be in the open state by adjusting the screw 2 ( Figure 8 as shown), so as not to interfere with the laying or retrieving equipment of the optical cable. When the action of laying or retrieving the optical cable 6 is completed, the blade 30 is made to tend to the closed state by adjusting the screw 2. When the optical cable 6 is clamped by the blade 30, the adjusting screw 2 can be finely adjusted to control the clamping force of the blade 30, so as to achieve the purpose of delivering the optical cable 6 into the pipe while ensuring sealing. When the optical cable 6 is laid, the clamping force of the blade 30 on the optical cable 6 is increased by adjusting the screw 2, so that the optical cable 6 is in a clamped state and cannot become loose.

[0056] In specific construction, considering that the optical cable in the pipe may become loose for a long time, it is necessary to regularly check the throttling device and adjust the tightness of the optical cable.

[0057] In the embodiments of the present invention, except for those with special descriptions for the models of each device, the models of other devices are not limited, as long as the devices can perform the above functions.

[0058] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred embodiment, and the serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cable-passing throttling device, characterized in that, The device includes: a cylinder body, an adjusting screw, a valve core component, a bracket and a seal. Among them, the valve core component, the bracket and the seal are located inside the cylinder body. The valve core component and the seal are installed on the bracket, the bracket is connected to the adjusting screw, and the adjusting screw is fixed on the cylinder body. The valve core component includes: a blade, a fixed seat, a connecting rod, a limit seat and a transmission shaft. The fixed seat is connected to the blade through the transmission shaft, the blade is connected to the connecting rod through the transmission shaft, and the connecting rod is connected to the limit seat through the transmission shaft. Among them, the blade is provided with a sealing surface, a throttling surface, a cross beam, a first shaft hole, a second shaft hole and an end surface. The sealing surface and the throttling surface are symmetrical to each other. The outer shape of the sealing surface is conical, and the cross section of the outer surface of the throttling surface is spiral-shaped, and the center of the spiral line coincides with the center of the second shaft hole.

2. The cable-passing throttling device according to claim 1, characterized in that, The outer shape of the cylinder body is a cylindrical structure, and necking interfaces are provided at both ends for connecting to the optical cable interfaces placed in the pipeline. A chamber is provided inside the cylinder body. A raised limit groove is provided above the chamber for limiting the movement of the valve core component, and a first fixing hole for fixing the adjusting screw is provided below the chamber.

3. The cable threading throttling device according to claim 2, characterized in that, The first shaft hole is connected to the connection hole on the fixed seat through the transmission shaft. Two threaded holes are provided at the other end of the fixed seat for fixing the valve core component on the bracket. The first shaft hole on the blade is connected to the third fixing hole of the connecting rod, and the second fixing hole at the other end of the connecting rod is connected to the fourth fixing hole on the limit seat. Another chute and a guide groove are provided on the limit seat. The chute enables the limit seat to slide on the bracket, and the guide groove is fixed in the limit groove on the cylinder body.

4. The cable threading throttling device according to claim 3, characterized in that, The outer shape of the bracket is cylindrical, and it is provided with a support plate, a fixing hole, a slide rail, a cavity, a cantilever beam and a driving hole. The support plates are circularly arrayed along the edge of the bracket. A fifth fixing hole is provided at the bottom of each support plate for installing the fixed seat on the valve core component. A gap is provided between two support plates for enabling the limit seat on the valve core component to slide up and down along the slide rail. The cavity is located at the bottom of the bracket for installing the seal. A cantilever beam and a driving hole are provided below the cavity. The driving hole is used to connect to the adjusting screw.

5. The cable-passing throttling device according to claim 4, characterized in that The seal is provided with a support ring and a sealing concave edge. The seal is installed in the cavity on the bracket. The support ring on the seal fills the cavity, and the sealing concave edge fits with the throttling surface on the blade.

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