Lead screw lifting mechanism sealing device for electrode boiler

Abstract

The utility model relates to the technical field of electrode boilers, in particular to a lead screw lifting mechanism sealing device for an electrode boiler, which comprises a lead screw, a nut is mounted on the periphery of the lead screw in a threaded manner, and the lead screw is rotatably mounted between an upper fixing plate and a lower fixing plate in the electrode boiler; a sealing mechanism is arranged on the periphery of the lead screw and comprises an upper shaft sleeve embedded in the upper fixing plate and a lower shaft sleeve embedded in the lower fixing plate, the top end of the nut extends into the upper shaft sleeve, and the bottom end of the nut penetrates through the lower fixing plate through the lower shaft sleeve. Sealing assemblies sleeving the periphery of the lead screw are fixedly connected between the top end of the nut and the upper shaft sleeve and between the bottom end of the nut and the lower shaft sleeve; by means of the multi-dimensional design that rigid sealing is matched with guiding constraint, the sealing and abrasion problems of the electrode boiler lead screw lifting mechanism in the high-temperature, multi-particulate-matter and vibration environment are solved, the single-point sealing performance is improved, and long-acting stable operation is achieved through collaborative design.

Description

Technical Field

[0001] This utility model relates to the field of electrode boiler technology, specifically a sealing device for a lead screw lifting mechanism for an electrode boiler. Background Technology

[0002] An electrode boiler is an industrial or domestic boiler device that uses electric energy to directly heat water. Its core principle is to generate current through the contact between electrodes and water, and to convert electrical energy into heat energy by using the resistance of the water.

[0003] In electrode boilers, an electric actuator or servo motor drives a built-in screw lifting mechanism to move up and down, thereby regulating the power. The built-in screw lifting mechanism is installed inside the inner cylinder, while the electric actuator or servo motor, as the power source, is installed outside the boiler.

[0004] However, the lead screw and nut operate in boiler water for a long time. Because the boiler water contains fine particles such as rust, it wears down the thread surface and may cause the lead screw and nut to jam when rotating.

[0005] Therefore, it is necessary to design a sealing device for a lead screw lifting mechanism for electrode boilers to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a sealing device for a lead screw lifting mechanism for an electrode boiler, so as to solve the problems mentioned in the background art.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A sealing device for a screw lifting mechanism in an electrode boiler includes a screw, a nut threaded onto the outer periphery of the screw, and the screw being rotatably mounted between an upper fixed plate and a lower fixed plate in the electrode boiler. An electrode shield mounting bracket is bolted to the periphery of the nut, and an electrode shield is fixedly mounted on the electrode shield mounting bracket. The screw drives the nut to move the electrode shield mounting bracket, causing the electrode shield to rise and fall to achieve power adjustment. A sealing mechanism is provided around the screw, the sealing mechanism including an upper bushing embedded in the upper fixed plate and a lower bushing embedded in the lower fixed plate. The top end of the screw rotatably passes through the upper fixed plate via the upper bushing, and the bottom end of the screw rotatably passes through the lower fixed plate via the lower bushing.

[0009] A sealing assembly sleeved around the lead screw is fixedly connected between the top end of the nut and the upper bushing, and between the bottom end of the nut and the lower bushing.

[0010] Furthermore, the sealing assembly includes a sealing tube sleeved around the lead screw, with one end of the sealing tube near the nut fixedly connected to the nut, and the other end of the sealing tube away from the nut fixedly connected to a pressure cap sleeved around the lead screw.

[0011] Furthermore, the sealing tube is a metal telescopic tube, and the metal telescopic tube is provided with a plurality of guide rings that are slidably sleeved around the screw, and the plurality of guide rings are evenly distributed along the axial direction of the metal telescopic tube.

[0012] Furthermore, an elastic sealing gasket is provided between the contact surfaces of the upper and lower bushings and the pressure plate, and the pressure plate is used to press the upper and lower bushings onto the upper and lower fixing plates respectively by bolts to form a multi-seal interface.

[0013] Furthermore, both the upper and lower bushings have O-rings embedded in their inner walls.

[0014] According to the sealing device of the lead screw lifting mechanism for an electrode boiler as described in the claim, the surface of the lead screw is coated with a high-temperature resistant grease layer.

[0015] The beneficial effects of this utility model are:

[0016] 1. This utility model solves the sealing and wear problems of the electrode boiler screw lifting mechanism in high temperature, multi-particulate matter and vibration environment through a multi-dimensional design of rigid sealing and guiding constraint. It not only improves the single-point sealing performance, but also achieves long-term stable operation through collaborative design.

[0017] 2. The metal telescopic tube of this utility model adopts a corrugated design and is welded to both ends of the nut. The other end is fixed to the bushing bolt by a pressure cap. The rigid clamping force of the pressure cap forms a gapless sealing interface between the bushing and the fixed plate, while the corrugated structure of the telescopic tube can freely expand and contract with the nut, avoiding sealing failure caused by movement; the guide rings are evenly distributed along the axial direction, forcibly constraining the nut to move only along the direction of the lead screw axis, avoiding radial offset.

[0018] 3. The inner walls of the upper and lower bushings are embedded with fluororubber O-rings, forming a second sealing barrier. Therefore, the external boiler water needs to pass through the rigid seal of the pressure cover-shoulder, the elastic seal of the O-ring, and the corrugated gap of the metal expansion tube in sequence. The multi-layer protection greatly reduces the probability of particulate matter intrusion and improves the sealing performance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram showing the installation position relationship of this utility model in an electrode boiler;

[0021] Figure 2 This is a schematic diagram showing the connection between this utility model and the electrode shield mounting frame in the boiler;

[0022] Figure 3 This is a structural diagram of the overall structure of this utility model;

[0023] The reference numerals in the attached figures are as follows:

[0024] 1-Screw, 2-O-ring seal, 3-Lower bushing, 4-Pressure cap, 5-Metal telescopic tube, 6-Nut, 7-Upper bushing, 8-Lower fixing plate, 9-Upper fixing plate, 10-Electrode shield mounting bracket, 11-Inlet pipe, 12-Electrode shield, 13-Zero electrode, 14-Electrode, 15-Guide ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] Please see Figures 1-3 In this embodiment of the present invention, a sealing device for a lead screw lifting mechanism for an electrode boiler includes a lead screw 1, a nut 6 threadedly mounted on the outer periphery of the lead screw 1, and the lead screw 1 rotatably mounted between an upper fixed plate 9 and a lower fixed plate 8 in the electrode boiler; an electrode shield mounting bracket 10 is fixedly connected to the outer periphery of the nut 6 by bolts, and an electrode shield 12 is fixedly mounted on the electrode shield mounting bracket 10; the lead screw 1 is used to drive the nut 6 to move the electrode shield mounting bracket 10 so that the electrode shield 12 is raised and lowered to achieve power adjustment; a sealing mechanism is provided on the outer periphery of the lead screw 1, the sealing mechanism including an upper bushing 7 embedded in the upper fixed plate 9 and a lower bushing 3 embedded in the lower fixed plate 8; the top end of the lead screw 1 rotatably passes through the upper fixed plate 9 through the upper bushing 7, and the bottom end of the lead screw 1 rotatably passes through the lower fixed plate 8 through the lower bushing 3;

[0028] A sealing assembly sleeved around the lead screw 1 is fixedly connected between the top end of the nut 6 and the upper bushing 7, and between the bottom end of the nut 6 and the lower bushing 3.

[0029] The sealing assembly includes a sealing tube sleeved around the lead screw 1. The end of the sealing tube near the nut 6 is fixedly connected to the nut 6, and the end of the sealing tube away from the nut 6 is fixedly connected to a pressure cap 4 sleeved around the lead screw 1.

[0030] The sealing tube is a metal telescopic tube 5. The metal telescopic tube 5 has multiple guide rings 15 that are slidably sleeved around the screw 1, and the multiple guide rings 15 are evenly distributed along the axial direction of the metal telescopic tube 5.

[0031] The metal telescopic tube features a corrugated design and is welded to both ends of the nut 6. The other end is fixed to the bushing 7 and 3 by bolts through the pressure cap 4. The rigid clamping force of the pressure cap creates a gapless sealing interface between the bushing and the fixing plates 8 and 9, while the corrugated structure of the telescopic tube can freely expand and contract with the nut, avoiding seal failure due to movement.

[0032] The guide rings 15 are evenly distributed along the axial direction, which forces the nut 6 to move only along the axis of the lead screw 1, thus avoiding radial offset.

[0033] Among them, an elastic sealing gasket is provided between the contact surfaces of the upper bushing 7 and the lower bushing 3 and the pressure cover 4. The pressure cover 4 presses the upper bushing 7 and the lower bushing 3 onto the upper fixing plate 9 and the lower fixing plate 8 respectively by bolts to form a multi-seal interface.

[0034] An elastic gasket is added between the pressure cap 4 and the bushing contact surface to compensate for minor deformation caused by thermal expansion or vibration and prevent local leakage at the sealing interface.

[0035] The surface of the lead screw 1 is coated with a high-temperature resistant grease layer.

[0036] Therefore, this utility model solves the sealing and wear problems of the electrode boiler screw lifting mechanism in high temperature, multi-particulate matter and vibration environment through a multi-dimensional design of rigid sealing and guiding constraint. It not only improves the single-point sealing performance, but also achieves long-term stable operation through collaborative design.

[0037] Example 2:

[0038] Please see Figure 3 Based on Example 1, both the upper bushing 7 and the lower bushing 3 have O-ring seals 2 embedded in their inner walls.

[0039] The inner walls of the upper and lower bushings 7 and 3 are embedded with fluororubber O-rings, forming a second sealing barrier. Therefore, the external boiler water needs to pass through the rigid seal of the pressure cover-shoulder, the elastic seal of the O-ring, and the corrugated gap of the metal expansion tube in sequence. The multi-layer protection greatly reduces the probability of particulate matter intrusion and improves the sealing performance.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A sealing device for a screw lifting mechanism for an electrode boiler, comprising a screw (1), wherein a nut (6) is threaded onto the outer periphery of the screw (1), and the screw (1) is rotatably mounted between an upper fixed plate (9) and a lower fixed plate (8) in the electrode boiler; an electrode shield mounting bracket (10) is fixedly connected to the outer periphery of the nut (6) by bolts, and an electrode shield (12) is fixedly mounted on the electrode shield mounting bracket (10); the screw (1) is used to drive the nut (6) to move the electrode shield mounting bracket (10) so that the electrode shield (12) rises and falls to achieve power regulation; characterized in that, A sealing mechanism is provided around the lead screw (1). The sealing mechanism includes an upper bushing (7) embedded in the upper fixed plate (9) and a lower bushing (3) embedded in the lower fixed plate (8). The top end of the lead screw (1) rotates through the upper fixed plate (9) via the upper bushing (7), and the bottom end of the lead screw (1) rotates through the lower fixed plate (8) via the lower bushing (3). A sealing assembly sleeved around the lead screw (1) is fixedly connected between the top end of the nut (6) and the upper bushing (7) and between the bottom end of the nut (6) and the lower bushing (3).

2. The sealing device for a lead screw lifting mechanism for an electrode boiler according to claim 1, characterized in that, The sealing assembly includes a sealing tube sleeved around the lead screw (1), with one end of the sealing tube near the nut (6) fixedly connected to the nut (6), and the other end of the sealing tube away from the nut (6) fixedly connected to a pressure cap (4) sleeved around the lead screw (1).

3. The sealing device for a lead screw lifting mechanism for an electrode boiler according to claim 2, characterized in that, The sealing tube is a metal telescopic tube (5). The metal telescopic tube (5) has multiple guide rings (15) that are slidably sleeved around the screw (1) inside, and the multiple guide rings (15) are evenly distributed along the axial direction of the metal telescopic tube (5).

4. The sealing device for a lead screw lifting mechanism for an electrode boiler according to claim 3, characterized in that, An elastic sealing gasket is provided between the contact surfaces of the upper bushing (7) and the lower bushing (3) and the pressure cover (4). The pressure cover (4) presses the upper bushing (7) and the lower bushing (3) onto the upper fixing plate (9) and the lower fixing plate (8) respectively by bolts to form a multi-seal interface.

5. A sealing device for a lead screw lifting mechanism for an electrode boiler according to claim 4, characterized in that, Both the upper bushing (7) and the lower bushing (3) have O-rings (2) embedded in their inner walls.

6. The sealing device for a lead screw lifting mechanism for an electrode boiler according to claim 1, characterized in that, The surface of the lead screw (1) is coated with a high-temperature resistant grease layer.

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