Pressure-resistant cable gland

Abstract

The present invention discloses a pressure-resistant cable stuffing box, which relates to the technical field of stuffing boxes, specifically a pressure-resistant cable stuffing box, comprising an inner sleeve, a bearing movably sleeved on the outside of the inner sleeve, a step flange movably sleeved on the outside of the bearing, a connecting flange fixedly connected to the bottom of the step flange, a tensioning spring fixedly installed below the step flange, and a limited inner sleeve fixedly connected below the step flange. The pressure-resistant cable stuffing box is configured by sleeve-mounting a step flange on the outside of the inner sleeve through the bearing, so that the bottom surface of the step flange is connected to a sealing ring through a tensioning spring, and the connecting flange is installed below the step flange so that the bottom surface of the sealing ring is located below the bottom surface of the connecting flange. When in use, the inner sleeve is rotated to the inner cavity of the wall surface through a thread, and the tensioning spring is in a compressed state, so that the sealing ring seals the connection between the inner sleeve and the bearing to prevent oil leakage, thereby effectively increasing the sealing performance of the device.

Description

Technical Field

[0001] The invention relates to the technical field of stuffing boxes, in particular to a pressure-resistant cable stuffing box. Background Art

[0002] With the development of the shipping industry, marine diesel engines are also changing rapidly. The emergence of electronic fuel injection engines has led to an increasing number of electrical devices on diesel engines. The emergence of whole-machine monitoring systems has also led to the installation of sensors in various locations on the diesel engine. Cables inevitably enter the main engine through the cylinder, frame, and base wall. Cable stuffing boxes are essential for cables to pass through the wall. Cable stuffing boxes are used to lock or attach cables to the electrical control cabinet and are sealed with epoxy resin putty. They have the advantages of simple structure, low cost, diverse forms, firm installation, easy use, and good sealing effect.

[0003] During the use of the cable stuffing box, due to the difference between the internal pressure of the diesel main engine and the external atmospheric pressure, it is easy to cause oil leakage from the inside of the diesel main engine. Under the action of pressure, the inside of the diesel engine is under pressure, resulting in poor sealing effect. In addition, when the diesel main engine is sealed, the installation steps of the sealing stuffing box are cumbersome and the structure is complex. The cost is high in the actual production process, which affects the market competitiveness. In order to improve the sealing performance of the stuffing box and reduce the installation steps of the stuffing box, we propose a pressure-resistant cable stuffing box. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a pressure-resistant cable stuffing box, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a pressure-resistant cable stuffing box, including an inner sleeve, the outer movable sleeve of the inner sleeve is provided with a bearing, the outer movable sleeve of the bearing is provided with a step flange, the bottom of the step flange is fixedly connected to a connecting flange, a tensioning spring is fixedly installed below the step flange, a limiting inner sleeve is fixedly connected below the step flange, the bottom end of the tensioning spring is fixedly connected to a sealing ring, and a limiting outer sleeve is fixedly installed above the sealing ring.

[0006] Optionally, the top end of the inner sleeve is fixedly connected to a connecting sleeve, the inner side of the connecting sleeve is fixedly installed with a sealing sleeve, and the outer movable sleeve of the connecting sleeve is covered with a fixing sleeve.

[0007] Optionally, a screw hole is opened inside the wall surface, and the screw hole is parallel to the holes inside the step flange and the connecting flange. The internal movable sleeves of the step flange and the connecting flange are equipped with fixing bolts, and the fixing bolts extend downward to the inner cavity of the wall surface.

[0008] Optionally, the position-limiting outer sleeve is movably sleeved on the outside of the position-limiting inner sleeve, and the inner side of the position-limiting outer sleeve is fitted with the outer side of the position-limiting inner sleeve.

[0009] Optionally, the outer diameter of the sealing ring is the same as the inner diameter of the connecting flange, and the diameter of the sealing ring is the same as the diameter of the limiting sleeve.

[0010] Optionally, the sealing ring is located below the bottom surface of the connecting flange, and the bottom surface of the sealing ring is located above the bottom surface of the inner sleeve.

[0011] Optionally, the diameter of the bottom surface of the sealing sleeve is greater than the diameter of the top surface, and the diameter of the top surface of the sealing sleeve is the same as the inner diameter of the inner sleeve.

[0012] Optionally, the inner diameter of the sealing sleeve and the inner diameter of the inner sleeve are parallel to each other in vertical direction, and the diameter of the top end of the fixing sleeve is smaller than the outer diameter of the top end of the sealing sleeve.

[0013] The present invention provides a pressure-resistant cable stuffing box, which has the following beneficial effects:

[0014] 1. This pressure-resistant cable stuffing box is equipped with a step flange on the outside of the inner sleeve through the bearing sleeve, so that the bottom surface of the step flange is connected to the sealing ring through a tensioning spring, and a connecting flange is installed below the step flange so that the bottom surface of the sealing ring is located below the bottom surface of the connecting flange. When in use, the inner sleeve is rotated to the inner cavity of the wall through the thread, and the tensioning spring will be in a compressed state, so that the sealing ring will seal the connection between the inner sleeve and the bearing to prevent oil leakage, which can effectively increase the sealing performance of the device.

[0015] 2. The pressure-resistant cable stuffing box is connected to a connecting sleeve above the inner sleeve, so that the sealing sleeve is fixedly mounted inside the connecting sleeve and the fixing sleeve is movably mounted outside the connecting sleeve. The top of the fixing sleeve is set to a cone shape and the sealing ring is made of elastic rubber. When in use, it is convenient to insert the cable into the inner cavity of the sealing sleeve through the top of the sealing sleeve, so that the cable enters the bottom of the wall surface, and then the sealing sleeve and the cable are fixed by the fixing sleeve, which can effectively prevent external water from entering the wall surface through the connection gap.

[0016] 3. The pressure-resistant cable stuffing box has mutually compatible threads on the outer side of the inner sleeve near the bottom and the inner cavity of the wall surface. By utilizing the cooperation of the step flange, mutually compatible threads are opened on the outer side of the connecting sleeve and the inner side of the fixed sleeve near the bottom. It is easy to install and operate. At the same time, the device has a simple structure, low production cost, tight connection, and can effectively prevent poor sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2This is a schematic diagram of the structure of the present invention;

[0019] Figure 3 This is a schematic structural diagram of the step flange of the present invention;

[0020] Figure 4 Schematic diagram of the structure of the sealing ring of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the sealing sleeve of the present invention;

[0022] Figure 6 It is a structural schematic diagram of the connecting sleeve of the present invention.

[0023] In the figure: 1. Inner sleeve; 2. Bearing; 3. Step flange; 4. Connecting flange; 5. Limiting inner sleeve; 6. Limiting outer sleeve; 7. Tensioning spring; 8. Sealing ring; 9. Connecting sleeve; 10. Sealing sleeve; 11. Fixing sleeve; 12. Fixing bolt; 13. Wall surface; 14. Screw hole. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] See also Figures 1 to 4The present invention provides a technical solution: a pressure-resistant cable stuffing box, including an inner sleeve 1, an outer movable sleeve of the inner sleeve 1 is provided with a bearing 2, an outer movable sleeve of the bearing 2 is provided with a step flange 3, the bottom of the step flange 3 is fixedly connected with a connecting flange 4, the outer diameter value of the sealing ring 8 is the same as the inner diameter value of the connecting flange 4, the diameter value of the sealing ring 8 is the same as the diameter value of the limiting sleeve 6, and the sealing performance between the device and the wall surface 13 is conveniently increased by setting the sealing ring 8 and the tensioning spring 7 with the step flange 3. The inner sleeve 1 will be rotated to the inner cavity of the wall surface 13 through a thread. First, the bottom surface of the sealing ring 8 will fit with the top surface of the wall surface 13, and then continue to rotate. The tensioning spring 7 between the sealing ring 8 and the step flange 3 will gradually In a compressed state, the step flange 3 no longer rotates under the action of the bearing 2, so that the bottom surface of the connecting flange 4 fits with the top surface of the wall surface 13, which can make the sealing ring 8 fit tightly with the top of the wall surface 13 to prevent external water from entering. A tensioning spring 7 is fixedly installed below the step flange 3, and a limited inner sleeve 5 is fixedly connected to the bottom of the step flange 3. The bottom end of the tensioning spring 7 is fixedly connected with a sealing ring 8. The sealing ring 8 is located below the bottom surface of the connecting flange 4, and the bottom surface of the sealing ring 8 is located above the bottom surface of the inner sleeve 1. The sealing ring 8 is located below the bottom surface of the connecting flange 4. When in use, it is convenient to make the sealing ring 8 continue to rotate after contacting the inner sleeve 1 so that the sealing ring 8 can fit with the wall surface 13 under the action of the tensioning spring 7. The top surface fits together, which is convenient for the use of the device, until the bottom surface of the connecting flange 4 fits together with the top surface of the wall surface 13, which is convenient for increasing the tightness of the connection and preventing the sealing ring 8 from loosening with the top surface of the wall surface 13. A limiting outer sleeve 6 is fixedly installed above the sealing ring 8, and the limiting outer sleeve 6 is movably sleeved on the outside of the limiting inner sleeve 5. The inner side of the limiting outer sleeve 6 fits together with the outer side of the limiting inner sleeve 5. The setting of the limiting inner sleeve 5 and the limiting outer sleeve 6 plays a role in positioning the sealing ring 8. When in use, it is convenient to limit the movement trajectory of the sealing ring 8 by the limiting inner sleeve 5 and the limiting outer sleeve 6, preventing the sealing ring 8 and the wall surface 13 from moving under the action of the tensioning spring 7, affecting the sealing effect of the sealing ring 8, and the inner surface of the wall surface 13 A screw hole 14 is provided on the top, and the screw hole 14 is parallel to the holes inside the step flange 3 and the connecting flange 4. The internal movable sleeves of the step flange 3 and the connecting flange 4 are provided with fixing bolts 12, and the fixing bolts 12 extend downward to the inner cavity of the wall surface 13. The fixing bolts 12 play the role of fixing the connecting flange 4 and the wall surface 13, facilitating a stable and fixed connection between the wall surface 13 and the connecting flange 4, and preventing the wall surface 13 and the connecting flange 4 from being loosely connected, causing the connecting flange 4 to fall off, affecting the stability of the device, and affecting the sealing effect of the device. At the same time, the device is simple to install. The inner sleeve 1 can be fixed to the wall surface 13 by only rotating the sealing sleeve 10, and then the fixing bolts 12 are used for auxiliary fixation.

[0026] See also Figures 5 and 6The top of the inner sleeve 1 is fixedly connected to the connecting sleeve 9, and the inner side of the connecting sleeve 9 is fixedly installed with a sealing sleeve 10. The outer movable sleeve of the connecting sleeve 9 is provided with a fixing sleeve 11. The cable is inserted from the upper side of the sealing sleeve 10 to the inner side of the sealing sleeve 10, so that the cable passes through the sealing sleeve 10 and the inner sleeve 1 and is inserted into the inner cavity of the wall surface 13. Subsequently, the fixing sleeve 11 is inserted from the upper side of the sealing sleeve 10 to the outer side of the sealing sleeve 10, so that the fixing sleeve 11 is fixed to the outer side of the connecting sleeve 9 by threads, so that the fixing sleeve 11 can fit the sealing sleeve 10 and the cable tightly to prevent the movement of the cable. The diameter value of the bottom surface of the sealing sleeve 10 is greater than the diameter value of the top surface, and the diameter value of the top surface of the sealing sleeve 10 is the same as the inner diameter value of the inner sleeve 1. When the sealing sleeve 10 is in use, the elastic rubber setting can effectively prevent external water from entering the interior of the sealing sleeve 10 through the gap between the sealing sleeve 10 and the cable under the action of the fixing sleeve 11, affecting the sealing effect of the device, and effectively protecting the cable. The inner diameter value of the sealing sleeve 10 is parallel to the inner diameter value of the inner sleeve 1, and the diameter value of the top of the fixing sleeve 11 is smaller than the outer diameter value of the top of the sealing sleeve 10. The diameter value of the top of the fixing sleeve 11 is smaller than the outer diameter value of the top of the sealing sleeve 10. The sealing sleeve 10 is made of elastic rubber, so that the sealing sleeve 10 can be tightly fitted to the cable during use, thereby increasing the stability of the device. At the same time, the structure is simple, the installation is quick, and the production cost can be effectively reduced.

[0027] In summary, when using the pressure-resistant cable stuffing box, first hold the sealing sleeve 10 and place the bottom of the inner sleeve 1 above the wall surface 13, then hold the sealing sleeve 10 and rotate it, so that the sealing sleeve 10 drives the inner sleeve 1 to rotate, and then the inner sleeve 1 will be rotated to the inner cavity of the wall surface 13 through the thread, first the bottom surface of the sealing ring 8 will fit with the top surface of the wall surface 13, and then continue to rotate, the tensioning spring 7 between the sealing ring 8 and the step flange 3 will gradually be in a compressed state, and at the same time, the step flange 3 will no longer rotate under the action of the bearing 2, so that the bottom surface of the connecting flange 4 will fit with the top surface of the wall surface 13, and then the fixing bolts 12 will pass through the step flange 3 and the connecting flange 4 and the inside of the wall surface 13 The screw hole moves to the inside of the wall surface 13, so that the step flange 3 is fixed to the connecting flange 4 and the wall surface 13, and then the bottom surface of the sealing ring 8 is fitted with the top surface of the wall surface 13, so that the tensioning spring 7 is in a compressed state, and then the cable is inserted from the top of the sealing sleeve 10 to the inside of the sealing sleeve 10, so that the cable is inserted into the inner cavity of the wall surface 13 through the sealing sleeve 10 and the inner sleeve 1, and then the fixing sleeve 11 is inserted from the top of the sealing sleeve 10 to the outside of the sealing sleeve 10, so that the fixing sleeve 11 is fixed to the outside of the connecting sleeve 9 through threads, so that the threads are fitted with the top surface of the inner sleeve 1, and at the same time, the top of the fixing sleeve 11 will squeeze the top of the sealing sleeve 10, so that the sealing sleeve 10 and the cable are fixed.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Furthermore, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A pressure-resistant cable stuffing box, comprising an inner sleeve (1) and a wall surface (13), characterized in that: The outer movable sleeve of the inner sleeve (1) is provided with a bearing (2), the outer movable sleeve of the bearing (2) is provided with a step flange (3), the bottom of the step flange (3) is fixedly connected to a connecting flange (4), a tensioning spring (7) is fixedly installed below the step flange (3), a limited inner sleeve (5) is fixedly connected below the step flange (3), a sealing ring (8) is fixedly connected to the bottom end of the tensioning spring (7), and a limited outer sleeve (6) is fixedly installed above the sealing ring (8); mutually adapted threads are provided on the outer side of the inner sleeve near the bottom and the inner cavity of the wall surface; A screw hole (14) is provided inside the wall surface (13), and the screw hole (14) is vertically parallel to the holes inside the step flange (3) and the connecting flange (4). The internal movable sleeves of the step flange (3) and the connecting flange (4) are provided with fixing bolts (12), and the fixing bolts (12) extend downward to the inner cavity of the wall surface (13); The position limiting outer sleeve (6) is movably mounted on the outside of the position limiting inner sleeve (5), and the inner side of the position limiting outer sleeve (6) is in contact with the outer side of the position limiting inner sleeve (5); The outer diameter of the sealing ring (8) is the same as the inner diameter of the connecting flange (4), and the diameter of the sealing ring (8) is the same as the diameter of the limiting sleeve (6); The sealing ring (8) is located below the bottom surface of the connecting flange (4), and the bottom surface of the sealing ring (8) is located above the bottom surface of the inner sleeve (1).

2. The pressure-resistant cable stuffing box according to claim 1, characterized in that: The top end of the inner sleeve (1) is fixedly connected to a connecting sleeve (9), the inner side of the connecting sleeve (9) is fixedly mounted with a sealing sleeve (10), and the outer movable sleeve of the connecting sleeve (9) is mounted with a fixing sleeve (11).

3. The pressure-resistant cable stuffing box according to claim 2, characterized in that: The diameter of the bottom surface of the sealing sleeve (10) is greater than the diameter of the top surface, and the diameter of the top surface of the sealing sleeve (10) is the same as the inner diameter of the inner sleeve (1).

4. The pressure-resistant cable stuffing box according to claim 2, characterized in that: The inner diameter of the sealing sleeve (10) is parallel to the inner diameter of the inner sleeve (1) in the vertical direction, and the diameter of the top end of the fixed sleeve (11) is smaller than the outer diameter of the top end of the sealing sleeve (10).

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