WO2019042480A1 - 中空轴回转密封的混凝土搅拌运输车 - Google Patents

中空轴回转密封的混凝土搅拌运输车 Download PDF

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Publication number
WO2019042480A1
WO2019042480A1 PCT/CN2018/104635 CN2018104635W WO2019042480A1 WO 2019042480 A1 WO2019042480 A1 WO 2019042480A1 CN 2018104635 W CN2018104635 W CN 2018104635W WO 2019042480 A1 WO2019042480 A1 WO 2019042480A1
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WIPO (PCT)
Prior art keywords
sealing
hollow shaft
shaft rotary
concrete mixer
mixing drum
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PCT/CN2018/104635
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English (en)
French (fr)
Inventor
盛富春
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烟台盛利达工程技术有限公司
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Publication of WO2019042480A1 publication Critical patent/WO2019042480A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
    • B28C5/4203—Details; Accessories
    • B28C5/4262—Closures; Sealing mechanisms

Definitions

  • the invention relates to a concrete mixer truck, in particular to a concrete mixer truck with a hollow shaft rotary sealing mechanism.
  • the sealing of the inlet and outlet of concrete mixer trucks is the development direction of concrete mixer trucks now and in the future, and is essential for improving construction quality and achieving safe and environmentally friendly production operations.
  • the existing rotary sealing technology mainly seals the inlet and outlet of the mixing drum, and there are two types of sealing, one is radial sealing and the other is end sealing. Since the rotary seal of the mixing drum is a large-diameter, high relative linear speed rotary seal of the cement sand slurry, its wear is relatively large.
  • the radial seal has the advantages of good sealing effect, high reliability and large carrying capacity. The problem is that the wear of the parts is large and the maintenance work is complicated.
  • the face seal sealing effect is weaker than the radial seal. Since the cover is not rotating, it also has the defects of large wear and poor reliability, so it is rarely used.
  • the invention provides a concrete mixer truck with a hollow shaft rotary seal, the purpose of which is to reduce the wear of the sealing component, improve the reliability of the mixing truck and reduce the maintenance difficulty while ensuring the sealing effect.
  • the hollow shaft rotary sealing concrete mixer truck comprises a mixing drum mounted on the vehicle body and capable of rotating relative to the vehicle body, and a feeding cylinder is arranged at the center of the outlet of the mixing drum, characterized in that: the utility model further comprises: installing on the vehicle body a moving member that is movable relative to the vehicle body, on which the sealing cover is mounted by a swing support, the outer edge of the sealing cover is in contact with the outer edge of the mixer drum outlet and the contact is provided with a first seal a device, the sealing cover is rotated with the mixing barrel with respect to the moving part under the driving of the mixing drum;
  • a through hole is defined in a middle portion of the sealing cover, and communicates with an inner hole of the slewing support.
  • the moving component further has a feeding hopper.
  • the outlet of the feeding hopper passes through the through hole in the middle of the sealing cover and the inside of the slewing support.
  • the hole is connected to the feeding cylinder, and the second sealing device is arranged at the junction of the feeding cylinder and the feeding hopper;
  • a third sealing device is disposed between the outer edge of the through hole of the sealing cover and the feeding cylinder.
  • the first sealing means may be hollow inflated or solid thick rubber.
  • the moving member is a rotating bracket that is mounted on the vehicle body by a rotational connection.
  • a first flange is disposed at an outer edge of the outlet of the mixing drum, and a second flange parallel to the first flange is disposed at an outer edge of the sealing cover, the first sealing
  • the device is an outer seal mounted on the first flange or the second flange.
  • the outer circumference of the feeding cylinder is provided with a first retaining ring
  • the third sealing device is mounted on the first retaining ring and is in contact with the sealing cover or is mounted on the sealing cover.
  • An inner seal ring that is in contact with the first retaining ring.
  • the feeding cylinder is provided with a second retaining ring near one end of the feeding hopper, and the second sealing device is mounted on the second retaining ring and is in contact with the outer wall of the inlet of the feeding hopper.
  • a dynamic seal ring mounted on the outer wall of the feed hopper outlet and in contact with the second retaining ring.
  • the moving member is a sliding bracket that is mounted on the vehicle body by a sliding fit.
  • the feed hopper is provided with an extension sleeve extending into the feed cylinder at the junction with the feed cylinder.
  • the extension sleeve comprises an elastic support body and a soft tube made of a soft wear resistant material.
  • the slewing support includes a stationary ring fixedly coupled to the moving member and a movable ring fixedly coupled to the sealing cover.
  • the invention has the following positive effects: (1) utilizing the characteristics of the slewing support with a central inner hole, the feeding hopper passes through the middle hole, overlaps with the feeding barrel of the mixing barrel, and seals
  • the sealing cover of the mixing drum is arranged in a swingable structure so as to rotate synchronously with the mixing drum, thereby changing the dynamic sealing portion between the feeding cylinder and the feeding hopper, thereby greatly reducing the radius of gyration of the dynamic sealing portion and reducing the sealing.
  • the relative linear velocity at the same time ensures the sealing effect, reduces the wear of the sealing parts, improves the reliability of the mixing truck and reduces the maintenance difficulty;
  • the outer sealing ring can not only seal the sealing cap to the mixing drum At the same time, it can also be used as a damping component to drive the sealing cover to rotate synchronously with the mixing drum, without separately providing a driving device for the sealing cover;
  • the sealing cover is mounted on the moving part, and can be used as an opening and closing part of the discharging material, and the opening and closing area Large, quick discharge, and only need to install the feeding mechanism on the sealing cover, no need to set up the discharging port, so you can use the larger size of the feeding hopper, and improve the efficiency of feeding and discharging. .
  • Figure 1 is a schematic view showing the structure of the tail portion of the mixing drum of the present invention.
  • Figure 2 is a partial schematic view showing the junction of the feed cylinder and the feed hopper in the second embodiment.
  • the utility model relates to a concrete mixing truck with a hollow shaft rotary seal, as shown in Fig. 1, comprising a mixing drum 1 mounted on a vehicle body and capable of rotating relative to the vehicle body, and a feeding cylinder 2 is arranged at the center of the outlet of the mixing drum 1;
  • the agitating truck further includes a moving member mounted on the vehicle body and movable relative to the vehicle body, the moving member being a rotating bracket 7 mounted on the vehicle body by a hinged shaft 8 in a rotational connection manner, and a driving cylinder.
  • a moving member mounted on the vehicle body and movable relative to the vehicle body, the moving member being a rotating bracket 7 mounted on the vehicle body by a hinged shaft 8 in a rotational connection manner, and a driving cylinder.
  • One end of the driving cylinder is hinged with the swing bracket, and the other end is hinged with the vehicle body, and the rotating bracket 7 can be rotated and opened under the action of the driving cylinder.
  • a sealing cover 3 is mounted on the moving member by a slewing support, and the slewing bearing includes a stationary ring 6 fixedly coupled to the moving member by a bolt and a movable ring 5 fixedly coupled to the sealing cover 3 by a bolt.
  • the outer edge of the sealing cover 3 is in contact with the outer edge of the outlet of the mixing drum 1 and the contact portion is provided with a first sealing device: a first flange is provided at the outer edge of the outlet of the mixing drum 1, and the sealing cover 3 is provided. a second flange parallel to the first flange, the first sealing device being an outer sealing ring 4 mounted on the first flange or the second flange; the sealing cover 3 is The mixer drum 1 is driven to rotate with respect to the moving member with the mixer drum 1.
  • the outer sealing ring 4 may be of a hollow inflatable expansion type or may be made of a solid thick rubber.
  • a through hole is defined in a middle portion of the sealing cover 3 to communicate with an inner hole of the slewing support, and the moving member is further provided with a feeding hopper 9, and the outlet of the feeding hopper 9 sequentially passes through the inner hole of the slewing support and is sealed.
  • the through hole in the middle of the cover 3 is connected to the feeding cylinder 2, and the feeding cylinder 2 is connected to the feeding hopper 9 at a position where a second sealing device is provided: the feeding cylinder 2 is disposed near one end of the feeding hopper 9 a second retaining ring, the second sealing device being mounted on the second retaining ring and in contact with the outer wall of the outlet of the feed hopper 9, or mounted on the outer wall of the outlet of the feed hopper 9 and in contact with the second retaining ring
  • the dynamic seal ring preferably, the dynamic seal ring is a rubber retaining ring 12.
  • a third sealing device is disposed between the outer edge of the through hole of the sealing cover 3 and the feeding cylinder 2: a first retaining ring 10 is disposed on the outer circumference of the feeding cylinder 2, and the third sealing device is installed on The inner ring 11 on the first retaining ring 10 and in contact with the sealing cover 3 or is mounted on the sealing cover 3 and in contact with the first retaining ring 10.
  • the sealing cap 3 is covered by the driving cylinder to the rear end of the mixing drum 1, and then the sealing cap 3 is rotated together with the mixing drum 1, at which time the first sealing device and the third sealing device are both statically sealed, only the second sealing
  • the device is a dynamic seal. Since the diameter of the outlet of the feed hopper 9 is much smaller than the outer diameter of the mixing drum 1, the relative linear velocity of the seal can be greatly reduced, and the sealing effect is reduced, and the wear of the sealing member is reduced and the wear is improved. The reliability of the mixer truck reduces the difficulty of maintenance.
  • the sealing cover 3 can be directly opened by the driving cylinder.
  • the moving member is a sliding bracket that is attached to the vehicle body by a sliding fit, and can be moved forward and backward with respect to the vehicle body by a linear driving device to realize opening and closing of the mixing drum 1.
  • the feeding hopper 9 is provided with a protruding feeding cylinder at the junction with the feeding cylinder 2
  • An extension sleeve in the inner sleeve comprising a soft tube 14 made of a soft wear-resistant material in the inner layer, and an elastic support body 13 on the outer layer, the elastic support body 13 being in contact with the rubber retaining ring 12 Dynamic seal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

一种中空轴回转密封的混凝土搅拌运输车，包括安装在车体上并能够相对于车体回转的搅拌筒（1），该搅拌筒（1）出口中央处设置有进料筒（2），还包括安装在车体上并能够相对于车体移动的移动部件，该移动部件上通过回转支撑安装有密封盖（3），该密封盖（3）外边缘与该搅拌筒（1）出口外边缘相接触且该接触处设置有第一密封装置，该密封盖在（3）搅拌筒（1）的驱动下随搅拌筒（1）相对于移动部件回转。该混凝土搅拌运输车将封堵搅拌筒（1）的密封盖（3）设置成可回转结构，使之随搅拌筒（1）同步回转，从而将动密封部分改到进料筒（2）与进料斗（9）之间，大大缩小了动密封处的回转半径，降低了密封处的相对线速度，在确保密封效果的同时，减少了密封部件的磨损，提高了搅拌运输车的可靠性，降低了维护难度。

Description

中空轴回转密封的混凝土搅拌运输车 技术领域
本发明涉及一种混凝土搅拌运输车，尤其是一种带有中空轴回转密封机构的混凝土搅拌运输车。
 背景技术
混凝土搅拌运输车进出料口的封闭是现在和未来混凝土搅拌运输车的发展方向，是提高建筑质量，实现安全、环保的生产作业所必不可少的。现有的回转密封技术，主要是对搅拌筒进出料口进行密封，密封形式有两种，一种是径向密封，一种是端面密封。由于搅拌筒的回转密封是对水泥砂石浆料的大口径、高相对线速度的回转密封，因此它的磨损是比较大的。径向密封具有密封效果好、可靠性高、承载能力大的优点，存在的问题是零部件的磨损较大，维护保养工作复杂。端面密封密封效果弱于径向密封，由于盖子是不转的，同样有磨损大、可靠性差的缺陷，因此很少应用。
 技术问题
本发明提出了一种中空轴回转密封的混凝土搅拌运输车，其目的是：在确保密封效果的同时，减少密封部件的磨损，提高搅拌运输车的可靠性，降低维护难度。
 技术解决方案
本发明技术方案如下：
中空轴回转密封的混凝土搅拌运输车，包括安装在车体上并能够相对于车体回转的搅拌筒，所述搅拌筒出口中央处设置有进料筒，其特征在于：还包括安装在车体上并能够相对于车体移动的移动部件，所述移动部件上通过回转支撑安装有密封盖，所述密封盖外边缘与所述搅拌筒出口外边缘相接触且该接触处设置有第一密封装置，所述密封盖在搅拌筒的驱动下随搅拌筒相对于移动部件回转；
所述密封盖中部开设有通孔，与回转支撑的内孔相通，所述移动部件上还安装有进料斗，所述进料斗的出口穿过密封盖中部的通孔以及回转支撑的内孔与进料筒相接，所述进料筒与进料斗相接处设有第二密封装置；
所述密封盖通孔的外边缘与进料筒之间设有第三密封装置。
作为本发明的进一步改进：为了达到更好的密封效果，第一密封装置可以是空心充气膨胀的，也可以是实心较厚的橡胶制成。
作为本发明的进一步改进：所述移动部件为通过转动连接方式安装在车体上的转动支架。
作为本发明的进一步改进：所述搅拌筒出口外边缘处设有第一翻边，所述密封盖的外边缘处设有与第一翻边相平行的第二翻边，所述第一密封装置为安装在第一翻边或第二翻边上的外密封圈。
作为本发明的进一步改进：所述进料筒外圆周上设有第一挡环，所述第三密封装置为安装在第一挡环上并与密封盖相接触的、或者是安装在密封盖上并与第一挡环相接触的内密封圈。
作为本发明的进一步改进：所述进料筒靠近进料斗的一端设有第二挡环，所述第二密封装置为安装在第二挡环上并与进料斗出口外壁相接触的、或者是安装在进料斗出口外壁并与第二挡环相接触的动密封圈。
作为本发明的进一步改进：所述移动部件为通过滑动配合方式安装在车体上的滑动支架。
作为本发明的进一步改进：所述进料斗上与进料筒相接处设有伸入进料筒内的延长套。
作为本发明的进一步改进：所述延长套包括弹性支撑体和由软质耐磨材料制成的软筒。
作为本发明的进一步改进：所述回转支撑包括与移动部件固定连接的静环和与密封盖固定连接的动环。
 有益效果
相对于现有技术，本发明具有以下积极效果：（1）利用回转支撑带有中心内孔的特点，进料斗穿过这个中孔，与搅拌桶的进料筒相搭接，并将封堵搅拌筒的密封盖设置成可回转结构，使之随搅拌筒同步回转，从而将动密封部分改到进料筒与进料斗之间，大大缩小了动密封处的回转半径，降低了密封处的相对线速度，在确保密封效果的同时，减少了密封部件的磨损，提高了搅拌运输车的可靠性，降低了维护难度；（2）外密封圈不仅能够实现密封盖对搅拌筒的密封，同时还能作为阻尼部件驱使密封盖随搅拌筒同步回转，无需为密封盖单独提供驱动装置；（3）密封盖安装在移动部件上，本身即可作为卸料的开闭部件，开闭面积大，卸料快，同时密封盖上仅需要安装进料机构，无需再设立卸料口，因此可选用较大规格的进料斗，同时提高了进、出料的效率。
 附图说明
图1为本发明搅拌筒尾部部分的结构示意图。
图2为具体实施例二中进料筒与进料斗相接处的局部示意图。
 本发明的实施方式
下面结合附图详细说明本发明的技术方案：
具体实施例一：
一种中空轴回转密封的混凝土搅拌运输车，如图1，包括安装在车体上并能够相对于车体回转的搅拌筒1，所述搅拌筒1出口中央处设置有进料筒2；
搅拌运输车还包括安装在车体上并能够相对于车体移动的移动部件，所述移动部件为通过铰接轴8以转动连接方式安装在车体上的转动支架7，还设有驱动油缸，驱动油缸一端与回转支架铰接，另一端与车体铰接，转动支架7可在驱动油缸的作用下转动开合。
所述移动部件上通过回转支撑安装有密封盖3，所述回转支撑包括通过螺栓与移动部件固定连接的静环6和通过螺栓与密封盖3固定连接的动环5。
所述密封盖3外边缘与所述搅拌筒1出口外边缘相接触且该接触处设置有第一密封装置：所述搅拌筒1出口外边缘处设有第一翻边，所述密封盖3的外边缘处设有与第一翻边相平行的第二翻边，所述第一密封装置为安装在第一翻边或第二翻边上的外密封圈4；所述密封盖3在搅拌筒1的驱动下随搅拌筒1相对于移动部件回转。为了达到更好的密封效果，外密封圈4可以是空心充气膨胀式的，也可以是由实心较厚的橡胶制成。
所述密封盖3中部开设有通孔，与回转支撑的内孔相通，所述移动部件上还安装有进料斗9，所述进料斗9的出口依次穿过回转支撑的内孔以及密封盖3中部的通孔与进料筒2相接，所述进料筒2与进料斗9相接处设有第二密封装置：所述进料筒2靠近进料斗9的一端设有第二挡环，所述第二密封装置为安装在第二挡环上并与进料斗9出口外壁相接触的、或者是安装在进料斗9出口外壁并与第二挡环相接触的动密封圈，优选地，动密封圈为橡胶挡圈12。
所述密封盖3通孔的外边缘与进料筒2之间设有第三密封装置：所述进料筒2外圆周上设有第一挡环10，所述第三密封装置为安装在第一挡环10上并与密封盖3相接触的、或者是安装在密封盖3上并与第一挡环10相接触的内密封圈11。
工作时，通过驱动油缸将密封盖3盖在搅拌筒1后端，然后密封盖3跟随搅拌筒1一起回转，此时第一密封装置、第三密封装置处均为静密封，仅第二密封装置处为动密封，由于进料斗9的出口处直径远小于搅拌筒1外径，因此可以极大地降低密封处的相对线速度，在确保密封效果的同时，减少了密封部件的磨损，提高了搅拌运输车的可靠性，降低了维护难度。
需要卸料时，直接通过驱动油缸将密封盖3打开即可。
具体实施例二：
本实施例与实施例一的区别仅在于：所述移动部件为通过滑动配合方式安装在车体上的滑动支架，可通过直线驱动装置相对于车体前后移动，实现搅拌筒1的开闭。
为确保进料斗9前后移动时能够始终与进料筒2相接，避免滑动支架前后移动时漏料，所述进料斗9上与进料筒2相接处设有伸入进料筒2内的延长套，所述延长套包括位于内层的由软质耐磨材料的软筒14、和位于外层的弹性支撑体13，所述弹性支撑体13与橡胶挡圈12相接触实现动密封。

Claims (10)

  1. 中空轴回转密封的混凝土搅拌运输车，包括安装在车体上并能够相对于车体回转的搅拌筒（1），所述搅拌筒（1）出口中央处设置有进料筒（2），其特征在于：还包括安装在车体上并能够相对于车体移动的移动部件，所述移动部件上通过回转支撑安装有密封盖（3），所述密封盖（3）外边缘与所述搅拌筒（1）出口外边缘相接触且该接触处设置有第一密封装置，所述密封盖（3）在搅拌筒（1）的驱动下随搅拌筒（1）相对于移动部件回转；
    所述密封盖（3）中部开设有通孔，与回转支撑的内孔相通，所述移动部件上还安装有进料斗（9），所述进料斗（9）的出口穿过密封盖（3）中部的通孔以及回转支撑的内孔与进料筒（2）相接，所述进料筒（2）与进料斗（9）相接处设有第二密封装置；
    所述密封盖（3）通孔的外边缘与进料筒（2）之间设有第三密封装置。
  2. 如权利要求1所述的中空轴回转密封的混凝土搅拌运输车，其特征在于：所述的第一密封装置为充气膨胀式。
  3. 如权利要求1所述的中空轴回转密封的混凝土搅拌运输车，其特征在于：所述移动部件为通过转动连接方式安装在车体上的转动支架（7）。
  4. 如权利要求1所述的中空轴回转密封的混凝土搅拌运输车，其特征在于：所述搅拌筒（1）出口外边缘处设有第一翻边，所述密封盖（3）的外边缘处设有与第一翻边相平行的第二翻边，所述第一密封装置为安装在第一翻边或第二翻边上的外密封圈（4）。
  5. 如权利要求1所述的中空轴回转密封的混凝土搅拌运输车，其特征在于：所述进料筒（2）外圆周上设有第一挡环（10），所述第三密封装置为安装在第一挡环（10）上并与密封盖（3）相接触的、或者是安装在密封盖（3）上并与第一挡环（10）相接触的内密封圈（11）。
  6. 如权利要求1所述的中空轴回转密封的混凝土搅拌运输车，其特征在于：所述进料筒（2）靠近进料斗（9）的一端设有第二挡环，所述第二密封装置为安装在第二挡环上并与进料斗（9）出口外壁相接触的、或者是安装在进料斗（9）出口外壁并与第二挡环相接触的动密封圈。
  7. 如权利要求1所述的中空轴回转密封的混凝土搅拌运输车，其特征在于：所述移动部件为通过滑动配合方式安装在车体上的滑动支架。
  8. 如权利要求7所述的中空轴回转密封的混凝土搅拌运输车，其特征在于：所述进料斗（9）上与进料筒（2）相接处设有伸入进料筒（2）内的延长套。
  9. 如权利要求8所述的中空轴回转密封的混凝土搅拌运输车，其特征在于：所述延长套包括软筒（14）和弹性支撑体（13）。
  10. 如权利要求1至9任意一项所述的中空轴回转密封的混凝土搅拌运输车，其特征在于：所述回转支撑包括与移动部件固定连接的静环（6）和与密封盖（3）固定连接的动环（5）。
PCT/CN2018/104635 2017-08-29 2018-09-07 中空轴回转密封的混凝土搅拌运输车 WO2019042480A1 (zh)

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