Weakly cemented stratum control auxiliary shaft safety door traction connecting device

Abstract

The utility model discloses a weakly cemented stratum control auxiliary shaft safety door traction connecting device, include: fixed mounting's support plate, a pair of upper and lower interval arrangement and fixed connection in support plate's cover plate, fixed connection in the cover plate of downside's sleeve and middle part sliding in the pin shaft of sleeve, wherein, the interval of a pair of cover plates can supply transmission chain and move through, and pin shaft lower extension reaches sleeve below, and the pitch of upper end can wear out downside's cover plate and transmission chain, sleeve is equipped with elastic part, under the action of elastic part, and pin shaft is subjected to the elastic upward tension of elasticity. The utility model can avoid the operator to climb to climb to pin shaft direct dismounting and the problem of appearing pin shaft to drop into the well shaft, can effectively improve work efficiency, increase the safety factor.

Description

Technical Field

[0001] This utility model relates to the field of mine safety systems, and in particular to a traction connection and control device for auxiliary shaft safety doors under weakly cemented strata conditions. It is designed for the characteristics of such strata to improve the adaptability and reliability of the safety door system. Background Technology

[0002] Weakly cemented strata typically exhibit loose cementation, high porosity, low mechanical strength, and significant water softening properties. Some weakly cemented rocks even show strong expansion and disintegration characteristics upon contact with water. Mines constructed in such strata face poor surrounding rock stability and are prone to deformation, posing a severe challenge to the stable operation of the mine shaft safety doors and their transmission mechanisms. As a critical safety barrier during cage operation, the reliability of the safety door's traction connection device directly affects operational safety.

[0003] Traditionally, safety doors are secured and released by directly inserting pins into the drive chain. However, in weakly cemented formations, rock deformation can cause changes in chain tension, making the traditional rigid connection prone to uneven stress on the pins, leading to loosening, detachment, or even breakage. Especially during maintenance or emergency response, operators must climb to the chain location to manually install and remove the pins, which is not only inefficient but also poses a significant safety hazard in the vibration environment of the wellbore in weakly cemented formations, as the pins or tools could easily slip out of their hands and fall into the wellbore. Summary of the Invention

[0004] The purpose of this invention is to provide a safety door traction connection device for controlling auxiliary wells in weakly cemented formations. This device can avoid the problem of operators climbing up and down to directly disassemble and install the pin shaft, as well as the problem of the pin shaft slipping out of their hands and falling into the well shaft. It can effectively improve work efficiency and increase the safety factor.

[0005] To achieve the above objectives, the safety door traction connection device for controlling the auxiliary well in this weakly cemented formation includes:

[0006] Support plate, for fixed installation;

[0007] A pair of cover plates are arranged at intervals and fixedly connected to the support plate, and the gap between the pair of cover plates is sufficient for the drive chain to move through.

[0008] The sleeve is fixedly connected to the lower cover plate;

[0009] The pin slides in the middle inside the sleeve, extends to the bottom of the sleeve, and can pass through the lower cover plate and the pitch of the transmission chain at the top.

[0010] The sleeve contains an elastic element, which causes the pin to be subjected to an upward elastic force.

[0011] In some examples of this utility model, the lower end of the sleeve is threadedly connected to the upper part of the adjusting cylinder; and the lower diameter of the adjusting cylinder is larger than the outer diameter of the sleeve.

[0012] The upper and lower ends of the elastic element are in contact with the shoulder of the middle of the pin and the upper end of the adjusting cylinder, respectively.

[0013] In some examples of this utility model, a positioning ring is also included; the positioning ring has a ring body and a protrusion; the ring body is threaded to the outside of the pin shaft, and a protrusion is provided on its circumferential side;

[0014] The lower end of the adjusting cylinder is provided with a slot for the positioning ring to pass through;

[0015] Specifically, when the pin shaft passes upward through the pitch of the drive chain, the positioning ring is located inside the sleeve; when the pin shaft disengages downward from the drive chain, the positioning ring is located outside the sleeve.

[0016] In some examples of this utility model, the upper part of the pin is provided with an inner cavity and radially arranged oil holes, and the lower part is provided with a top pressure rod;

[0017] The lower end of the push rod extends below the pin.

[0018] The inner cavity is equipped with lubricant and is connected to an oil hole. When the top pressure rod moves upward, it can compress the inner cavity.

[0019] In some examples of this utility model, a sensor connected to the controller is provided along the axis on the upper part of the pin;

[0020] The sensor transmits the pressure signal to the controller, which then controls the alarm components.

[0021] In some examples of this utility model, the sleeve is provided with a strip groove arranged along the axis, and the sensor wire passes through the strip groove to connect to the controller.

[0022] In some examples of this utility model, the upper end of the lower cover plate has a V-shaped structure;

[0023] The upper cover plate has a through hole through which the upper end of the supply pin passes.

[0024] Compared with existing technologies, this safety door traction connection device for controlling auxiliary wells in weakly cemented formations features a pin shaft that slides within a sleeve in the middle, with its upper end able to pass through the lower cover plate and the pitch of the transmission chain. Furthermore, the pin shaft is subjected to an upward elastic force. By pulling the pin shaft, the operator moves it up and down, releasing or compressing the elastic element. The upper part of the pin shaft disengages from or passes through the transmission chain, thus controlling the movement of the safety door transmission chain to open and close the safety door. This avoids the problem of operators climbing up and down to directly disassemble and install the pin shaft, and prevents the pin shaft from slipping out of their hands and falling into the wellbore. It effectively improves work efficiency and increases the safety factor.

[0025] Since the lower end of the sleeve is threaded to the upper part of the adjusting cylinder, the elastic force of the elastic element is adjusted by rotating the adjusting cylinder to complete the pin's pressing or passing-through force on the transmission chain, so as to avoid the problem of the pin coming off the transmission chain due to the transmission chain shaking or the pin's force being too small when the pin is locked to the transmission chain.

[0026] Because a positioning ring is provided on the pin, when the pin is disengaged from the drive chain downwards, the positioning ring is located outside the sleeve. At this time, rotating the pin will cause the positioning ring to rotate as well. The protrusion on the ring body and the slot on the adjusting cylinder are misaligned, which can effectively limit the pin and adjust the position of the positioning ring on the pin to meet different usage environments. In addition, it can lubricate the drive chain, avoid contact wear caused by the pin rigidly passing through the chain pitch, and facilitate the positioning of the pin on the drive chain. Attached Figure Description

[0027] Figure 1 This is the overall front view of this utility model;

[0028] Figure 2 This is a right-side view of the entire utility model (the transmission chain is not shown);

[0029] Figure 3 yes Figure 1 Enlarged view of a portion of position A in the middle;

[0030] Figure 4 This is a schematic diagram of the positioning ring and the groove hole on the adjusting cylinder in this utility model;

[0031] In the diagram: 10, support plate; 20, cover plate;

[0032] 30. Sleeve; 31. Groove;

[0033] 41. Pin, 411. Inner cavity, 412. Oil hole, 42. Top pressure rod, 43. Elastic element, 44. Adjusting cylinder, 441. Slot;

[0034] 50. Positioning ring; 51. Ring body; 52. Protrusion. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0036] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0037] like Figure 1 , Figure 2 As shown, the safety door traction connection device for controlling the auxiliary well in this weakly cemented formation includes:

[0038] Support plate 10, fixed installation;

[0039] A pair of cover plates 20 are arranged vertically and fixedly connected to the support plate 10, and the distance between the pair of cover plates 20 is sufficient for the transmission chain to move through.

[0040] Sleeve 30 is fixedly connected to the lower cover plate 20;

[0041] The pin 41 slides in the middle inside the sleeve 30, extends below the sleeve 30, and can pass through the lower cover plate 20 and the pitch of the transmission chain at the upper end.

[0042] Among them, the sleeve 30 is provided with an elastic element 43, and under the action of the elastic element 43, the pin 41 is subjected to an upward elastic force.

[0043] Specifically, the support plate 10 is the support and fixing structure of this device. It can be formed by welding the first steel plate and the second steel plate to form a vertical L-shaped structure. That is, the first steel plate is fixed to the wall near the safety door by expansion bolts to ensure the overall installation and fixing. The second steel plate is used to support the sleeve 30 and the cover plate 20.

[0044] A pair of cover plates 20, which can also be steel plates, are connected to the second steel plate by welding. The steel plate material has high hardness and density, and can be fireproof and moisture-proof. A through hole for the pin shaft 41 to pass through can be provided in the middle of the pair of cover plates 20, and the distance between them is slightly larger than the size of the transmission chain so that the transmission chain can move through. The sleeve 30 can be connected to the lower cover plate 20 by welding or bolting.

[0045] The upper diameter of the pin 41 is slightly smaller than the length of the gap between the transmission chains, meaning that the pin 41 needs to pass through the transmission chain to hold it in place. A pull ring or handle can be installed at the lower end of the pin 41 for easy manual operation. For example, when it is a pull ring, it includes a ring sleeve, a ring handle, and a ring support. The ring sleeve is a double-ring solid steel ring, the ring handle is cylindrical, and the ring support is an inverted trapezoid and connected to the pin 41. The elastic element 43 can be a cylindrical spring fitted on the pin 41, with the lower end of the cylindrical spring limiting the movement and the upper end contacting the middle of the pin 41, so that the pin 41 bears an upward elastic force.

[0046] This safety door traction connection device for controlling auxiliary wells in weakly cemented formations can utilize waste steel materials to reprocess and weld key components such as support plate 10 and cover plate 20, effectively recycling waste materials. When opening and closing the safety door, the operator pulls the pin 41, causing it to move up and down and release or compress the elastic element 43. The upper part of the pin 41 disengages from or passes through the transmission chain, thus controlling the movement of the safety door transmission chain to complete the opening and closing of the safety door. This avoids the problem of operators climbing up and down to directly disassemble and install the pin 41, and the pin 41 slipping out of their hands and falling into the well shaft, effectively improving work efficiency and increasing the safety factor.

[0047] In some examples of this utility model, such as Figure 1 , Figure 2 As shown, the lower end of the sleeve 30 is threadedly connected to the upper part of the adjusting cylinder 44;

[0048] The lower diameter of the adjusting cylinder 44 is larger than the outer diameter of the sleeve 30;

[0049] The upper and lower ends of the elastic element 43 are in contact with the middle shoulder of the pin 41 and the upper end of the adjusting cylinder 44, respectively.

[0050] Specifically, the adjusting cylinder 44 is threadedly installed at the lower end of the sleeve 30. That is, rotating the adjusting cylinder 44 can adjust the vertical position of the adjusting cylinder 44 relative to the sleeve 30, which can adjust the elastic force of the elastic element 43.

[0051] The elastic element 43 contacts the middle of the pin 41 and the adjusting cylinder 44 respectively. When the adjusting cylinder 44 moves upward, the elastic element 43 is compressed, and the elastic force is large at this time. When the adjusting cylinder 44 moves downward, the elastic element 43 is released, and the elastic force is small at this time. In this example, the elastic force of the elastic element 43 is adjusted by rotating the adjusting cylinder 44 to complete the force of the pin 41 pressing against or passing through the limit on the transmission chain, so as to avoid the problem of the pin 41 disengaging from the transmission chain due to the shaking of the transmission chain or the small force of the pin 41 when the pin 41 is locked to the transmission chain.

[0052] In some examples of this utility model, such as Figure 1 , Figure 2 , Figure 4 As shown, this device also includes a positioning ring 50;

[0053] The positioning ring 50 has a ring body 51 and a protrusion 52; the ring body 51 is threaded to the outside of the pin 41, and the protrusion 52 is provided on the circumference.

[0054] The lower end of the adjusting cylinder 44 is provided with a slot 441 for the positioning ring 50 to pass through;

[0055] When the pin 41 passes through the pitch of the transmission chain upward, the positioning ring 50 is located inside the sleeve 30; when the pin 41 disengages from the transmission chain downward, the positioning ring 50 is located outside the sleeve 30.

[0056] Specifically, there can be multiple protrusions 52. Correspondingly, the slots 441 on the adjusting cylinder 44 are consistent with the positioning ring 50, which can ensure that the positioning ring 50 passes through smoothly.

[0057] The positioning ring 50 does not affect the locking of the transmission chain by the upward movement of the pin 41. When the pin 41 moves downward away from the transmission chain, the positioning ring 50 is located outside the sleeve 30. At this time, when the pin 41 is rotated, the positioning ring 50 will rotate with it. The protrusion 52 on the ring body 51 is misaligned with the slot 441 on the adjusting cylinder 44, that is, the positioning ring 50 contacts the adjusting cylinder 44 but cannot pass through, which can effectively limit the pin 41.

[0058] Additionally, the ring body 51 is threaded onto the pin 41, allowing adjustment of the position of the positioning ring 50 on the pin 41, i.e., the limiting position of the pin 41, to meet different usage environments.

[0059] In some examples of this utility model, such as Figure 1 , Figure 3 As shown, the upper part of the pin 41 is provided with an inner cavity 411 and a radially arranged oil hole 412, and the lower part is threaded with a top pressure rod 42;

[0060] The lower end of the push rod 42 extends below the pin 41;

[0061] The inner cavity 411 is provided with lubricant and is connected to the oil hole 412. When the top pressure rod 42 moves upward, it can compress the inner cavity 411.

[0062] Specifically, the lubricant can be grease. In the initial state, the lubricant is located in the inner cavity 411. When the top pressure rod 42 is rotated to compress the inner cavity 411, the grease can be discharged from the inner cavity 411 and the oil hole 412 and act on the transmission chain. In this example, the transmission chain can be lubricated to avoid contact wear caused by the pin 41 rigidly passing through the chain pitch, and to facilitate the positioning of the pin on the transmission chain. In addition, it is understood that the oil hole 412 cannot be lower than the position of the transmission chain to avoid failure to apply the grease at the transmission chain pitch position.

[0063] In some examples of this utility model, a sensor connected to the controller is provided on the upper part of the pin 41 along the axis;

[0064] The sensor transmits the pressure signal to the controller, which then controls the alarm components.

[0065] Specifically, the sensor can be an optical fiber sensor, a photosensitive sensor, etc., to detect the breakage of the pin 41. That is, when the pin 41 breaks after a long period of use, the controller receives the corresponding signal and controls the alarm component to generate an alarm signal to remind the operator to quickly carry out maintenance.

[0066] Preferably, the sleeve 30 is provided with a strip groove 31 arranged along the axis, and the sensor wire passes through the strip groove 31 to connect to the controller;

[0067] In some examples of this utility model, as shown in 2, the upper end of the lower cover plate 20 has a V-shaped structure;

[0068] In this example, the upper V-shaped cover plate 20 can effectively support the transmission chain to prevent the transmission chain from shifting due to swinging or other reasons, which would prevent the pin 41 from passing through the transmission chain accurately.

[0069] Furthermore, the upper cover plate 20 is provided with a through hole through which the upper end of the pin shaft 41 passes;

[0070] After passing through the transmission chain, the pin 41 can be inserted and positioned in the through hole of the upper cover plate 20. That is, the pin 41 has support points both above and below the transmission chain, which increases safety.

[0071] The safety door traction connection device for the auxiliary well in this weakly cemented formation controls the movement of the safety door by pulling the pin 41 up and down and releasing or compressing the elastic element 43. The upper part of the pin 41 disengages from or passes through the transmission chain, thus controlling the movement of the safety door transmission chain to complete the opening and closing of the safety door. This avoids the problem of operators climbing up and down to directly disassemble and install the pin 41, as well as the problem of the pin 41 slipping out of their hands and falling into the wellbore.

[0072] Furthermore, it significantly improves efficiency during use. For example, if it saves 2 hours per month and 150 yuan per minute, the annual economic benefit generated by the cage roller shutter door locking device would be: 60 minutes × 2 hours × 12 months × 150 yuan = 216,000 yuan. The design and application of the safety door traction device avoids the risks of falling objects from the shaft and personnel falling from heights, providing a safety guarantee for the sustainable and efficient operation of the auxiliary shaft system, and has high social benefits.

[0073] The foregoing description, with reference to preferred embodiments, details an exemplary implementation of the safety door traction connection device for controlling auxiliary wells in weakly cemented formations proposed by this utility model. However, those skilled in the art will understand that various modifications and alterations can be made to the above specific embodiments without departing from the concept of this utility model, and various combinations can be made to the various technical features and structures proposed by this utility model without exceeding the protection scope of this utility model, which is determined by the appended claims.

Claims

1. A safety door traction connection device for controlling auxiliary wells in weakly cemented formations, characterized in that, include: Support plate (10), fixed installation; A pair of cover plates (20) are arranged vertically and fixedly connected to the support plate (10), and the distance between the pair of cover plates (20) is sufficient for the transmission chain to move through; The sleeve (30) is fixedly connected to the cover plate (20) on the lower side; The pin (41) slides in the middle inside the sleeve (30), extends to the bottom of the sleeve (30), and can pass through the cover plate (20) on the lower side and the pitch of the transmission chain at the upper end. The sleeve (30) is provided with an elastic element (43). Under the action of the elastic element (43), the pin (41) is subjected to an upward elastic force.

2. The safety door traction connection device for controlling auxiliary wells in weakly cemented formations according to claim 1, characterized in that, The lower end of the sleeve (30) is threaded to the upper part of the adjusting cylinder (44); and the lower diameter of the adjusting cylinder (44) is greater than the outer diameter of the sleeve (30); The upper and lower ends of the elastic element (43) are in contact with the shoulder of the middle part of the pin (41) and the upper end of the adjusting cylinder (44).

3. The safety door traction connection device for controlling auxiliary wells in weakly cemented formations according to claim 2, characterized in that, It also includes a positioning ring (50); the positioning ring (50) has a ring body (51) and a protrusion (52); the ring body (51) is threaded to the outside of the pin (41) and has a protrusion (52) on its circumference; The lower end of the adjusting cylinder (44) is provided with a slot (441) through which the positioning ring (50) passes; When the pin (41) passes through the pitch of the transmission chain upward, the positioning ring (50) is located inside the sleeve (30); when the pin (41) disengages from the transmission chain downward, the positioning ring (50) is located outside the sleeve (30).

4. The safety door traction connection device for controlling auxiliary wells in weakly cemented formations according to claim 1, characterized in that, The pin (41) has an inner cavity (411) and radially arranged oil holes (412) on the upper part, and a top pressure rod (42) on the lower part. The lower end of the push rod (42) extends below the pin (41); The inner cavity (411) is provided with lubricant and is connected to the oil hole (412). When the top pressure rod (42) moves upward, it can compress the inner cavity (411).

5. The safety door traction connection device for controlling auxiliary wells in weakly cemented formations according to any one of claims 1 to 4, characterized in that, The upper part of the pin (41) is provided with a sensor connected to the controller along the axis; The sensor transmits the pressure signal to the controller, which then controls the alarm components.

6. The safety door traction connection device for controlling auxiliary wells in weakly cemented formations according to claim 5, characterized in that, The sleeve (30) is provided with a strip groove (31) arranged along the axis, and the sensor’s wire passes through the strip groove (31) to connect to the controller.

7. The safety door traction connection device for controlling auxiliary wells in weakly cemented formations according to any one of claims 1 to 4, characterized in that, The upper end of the lower cover plate (20) has a V-shaped structure; The upper cover plate (20) is provided with a through hole through which the upper end of the pin shaft (41) passes.

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