滚塑排水检查井技术现状与发展趋势

Current situation and development trend of roll plastic drainage inspection well

随着我国城镇化的深入推进和雨污分流改造的持续实施，城市地下排水管网得以快速发展和不断完善。据统计，目前全国排水管线的年增长速度为10%。根据市政发展速度和配套比例预测：一个50万人口城市，每年对检查井的需求在1万套左右；全国每年新增和改造的排水检查井数量至少在150万套以上。此外，根据最新住宅设计要求，厨房污水和卫生间污水须分流设计，也使得污水出户管数量翻番，所以目前建筑小区污水检查井的设计数量是以前的3倍以上。每个小区检查井数量少则上百个、多则上千个。按全国每年新增住宅建筑面积约3.6亿平方米的发展速度计算，初步估计每年需排水检查井250万套。综合下来，全国每年仅排水检查井市场需求在400万套以上。

With the further development of urbanization in China and the continuous transformation of rain and sewage diversion, the urban underground drainage network has been developed rapidly and continuously improved. According to statistics, the annual growth rate of the national drainage pipeline is 10%. According to the speed and matching proportion of municipal development, it is predicted that the demand for the inspection well is about 10 thousand sets per year in a city of 500 thousand, and the number of newly added and reformed drainage inspection wells in the country is at least 1 million 500 thousand sets per year. In addition, according to the latest housing design requirements, kitchen sewage and toilet sewage must be shunted design, also make the number of sewage outlet doubling, so the number of the design of sewage inspection wells in the residential district is more than 3 times. The number of inspection wells in each cell is less than 100, or more than 1000. According to the annual growth rate of the new residential building area of about 360 million square meters, it is estimated that there are 2 million 500 thousand sets of drainage wells each year. As a whole, the market demand for drainage wells only exceeds 4 million sets per year.

塑料排水检查井因其质量轻、耐腐蚀、强度高、不渗漏、使用寿命长、安装工期短以及采用工厂化专业制作，产品质量有保证等特点，由它与埋地塑料排水管材组合而成的无渗漏排水管道系统，在市政建设和建筑小区得到了广泛应用。

Because of its light quality, corrosion resistance, high strength, high strength, no leakage, long service life, short installation time, the quality of the product is guaranteed by the factory and the quality of the product is guaranteed. The drainage pipe system, which is combined with the buried plastic drainage pipe, has been widely used in the municipal construction and the building district. General application.

一、 行业基本情况

First, the basic situation of the industry

1.1国家政策助力行业发展

1.1 national policy support industry development

我国最早研究开发塑料检查井是在2002年。当时，埋地塑料排水管己在工程中广泛应用，但排水检查井仍然采用砖砌井，不仅由于渗漏造成环境污染，而且造成大量耕地破坏，材料加工过程大量耗费自然资源。用塑料检查井替代砖砌井是解决这一问题的有效途径。广大企业家敏锐地认识到塑料检查井广阔的发展前景，以敢为天下先的勇气开始了塑料检查井的研制开发工作。

The earliest research and development of plastic inspection wells in China was in 2002. At that time, buried plastic drainage pipe has been widely used in the project, but the drainage inspection wells still use brick well, not only because of leakage caused environmental pollution, but also caused a large number of cultivated land destruction, the process of material processing cost a lot of natural resources. It is an effective way to solve this problem by using plastic inspection wells instead of brick wells. The vast number of entrepreneurs are keenly aware of the broad prospects for development of plastic inspection wells, and have begun the development of plastic inspection wells with the courage to dare to take the lead.

国家适时出台政策，助力塑料检查井这一新兴产业的发展。建设部2007年第659号公告《建设事业“十一五”推广应用和限制禁止使用技术（第一批）》第128项推广应用项目规定：塑料排水管道系统应优先采用塑料检查井。之后，四川、山西、上海、重庆、江西、北京、山东、河北和云南等地建设部门先后出台排水检查井严禁使用粘土砖，推广塑料排水检查井的有关文件。

The state will timely introduce policies to help the development of plastics inspection wells as a new industry. The Ministry of construction, 2007 659th bulletin "construction enterprise" 11th Five-Year "promotion and application and restriction of the prohibition of use technology (the first batch)" 128th popularization and application of the project stipulates: plastic drainage pipe system should be preferred to use plastic inspection wells. After that, the construction departments of Sichuan, Shanxi, Shanghai, Chongqing, Jiangxi, Beijing, Shandong, Hebei and Yunnan have successively banned the use of clay bricks and popularized the relevant documents of the plastic drainage inspection wells.

经过近十年的发展，我国塑料检查井产品从最初的自主开发、引进和试用，到现在已经具有相当规模，其中小区井已经得到市场广泛认可，在工程中大量采用；市政井在部分地区开始试用或采用。

After nearly ten years of development, China's plastic inspection well products from the original development, introduction and trial have already been a considerable scale, in which the residential well has been widely accepted by the market and used in a large number of projects; municipal wells in some areas began to try or adopt.

1.2塑料检查井行业现状

Current situation of 1.2 plastics inspection well industry

目前我国塑料检查井品种主要分为直壁井、收口井和管件井，一般采用分离式结构形式，并由井座、井筒、收口锥体、伸缩节、塑料井盖和防护井盖等组成，市政井还需要增加止水环、挡圈、承压圈、防护盖座等附件，各组件之间一般为柔性连接，需要有较好的密封性能。井底分为有流槽、无流槽和带沉泥室等三种形式。加工工艺主要有一次注塑成型工艺、旋转成型工艺、螺旋缠绕工艺、压铸成型工艺、焊接成型工艺、预制拼装工艺等。据不完全统计，截止到2014年中期，中国塑料检查井生产企业已达200家左右，年总生产能力：建筑小区塑料排水检查井约200万只，市政塑料排水检查井约25万只，部分企业还在为上这个项目进行积极地准备。

At present, the main types of plastic inspection wells in China are mainly divided into straight wall well, receiving well and pipe well. Generally, it is composed of well, well bore, cone, expansion joint, plastic cover and protective cover, and other accessories, such as water stop ring, retaining ring, bearing ring, protective cover seat and so on, are also needed. Generally, it is flexible connection and needs better sealing performance. The bottom hole can be divided into three forms: flow channel, no flow channel and mud chamber. The processing technology includes an injection molding process, a rotating molding process, a spiral winding process, a die-casting process, a welding molding process and a prefabricated assembly process. According to incomplete statistics, up to the middle of 2014, China's plastic inspection well production enterprises have reached about 200, the annual total production capacity: about 2 million of the plastic drainage inspection wells in the building district, and about 250 thousand municipal plastic drainage inspection wells, some enterprises are still preparing for the project.

国内塑料检查井按照用途主要分为两类：

Plastic inspection wells in China are mainly divided into two types according to their uses:

建筑小区井主要用于居住区、公共建筑区和和厂区范围内的道路、绿地以及建筑物周围，直径一般不超过800mm，埋深不超过6000mm，且不提供人员下井操作的空间。这类产品欧洲将其定义为浅井或排水管道辅件，其终端在地面，可以让清洁，检查和测试设备进入和去除杂物，但不提供人员的进入通道，井筒内径小于800mm，一般埋深不超过1250mm，这一点也是欧洲标准与国内标准的主要区别。

The construction area well is mainly used in the roads, green space and around the buildings in the residential area, the public building area and the factory area. The diameter is generally not more than 800mm, the buried depth is not more than 6000mm, and it does not provide the space for the operation of the people. This kind of product is defined by Europe as a shallow well or a drainage pipe accessory. Its terminal is on the ground, which allows cleaning, inspection and testing equipment to enter and remove debris, but does not provide entry channels, the bore of the wellbore is less than 800mm, and the depth is not more than 1250mm, which is the main difference between European standards and domestic standards.

市政井主要用于市政道路、公共建筑区、居住区、厂区等城市机动车道周围以及车辆交通区域，直径最大1.2m，埋深不超过7m，可以提供人员下井操作的空间。这类产品欧洲将其定义为交通区的和深埋的人孔井。埋深一般不超过6m，主要用于建筑结构外人行道或车辆交通区域。

Municipal wells are mainly used in municipal road, public building area, residential area, factory area and other urban mobile lanes and vehicle traffic areas. The diameter is maximum 1.2m, and the buried depth is not more than 7m. It can provide space for people to operate in the well. In Europe, such products are defined as deep hole wells in the traffic area. Burying depth is generally not more than 6m, mainly used for building structure outsideway or vehicle traffic area.

1.3塑料检查井市场前景

Market prospect of 1.3 plastic inspection well

党的十八大以后，浙江省委省政府作出了“五水共治”的决策，亦即：治污水、防洪水、排涝水、保供水、抓节水，并明确提出，要以治水为突破口推进城镇建设的转型升级。该项目计划从2014年开始，在今后3年内由四级政府共出资700亿元，集中解决城镇和乡村的“五水”问题。目前，浙江省各地县已经因地制宜，制定了具体方案，正在如火如荼的实施这一庞大工程。广大塑料检查井生产企业抓住这一机

After the eighteen Party of the party, the provincial government of the Zhejiang provincial Party committee made the decision of "five water common governance", that is, treating sewage, flood prevention, drainage water, water supply and water saving, and put forward clearly that the transformation and upgrading of urban construction should be promoted with water treatment as a breakthrough. The project is scheduled to start in 2014. In the next 3 years, a total of 70 billion yuan will be invested by the four level government to solve the problem of "five water" in towns and villages. At present, all counties in Zhejiang province have formulated specific plans according to local conditions, and are carrying out this huge project in full swing. A large number of plastic inspection well production enterprises seize this machine