Is there an Active USB Hub which can charge a Dell Venue 11 Pro 7140 ?
... maybe with Power Delivery-technics?
The mains connected PowerPort 6 & PowerPort 6 Lite should be suitable;
Or are you referring to a data hub version?
This looks promising: https://www.amazon.com/UGREEN-Adapter-MacBook-Spectre-Samsung/dp/B077FSBGQK/ref=sr_1_5?ie=UTF8&qid=1530195757&sr=8-5&keywords=usb+3+hub+power+delivery+60w
Type-C hub also supports 5V-20V PD quick charge for your laptop and up to 60W(max), can be used for data transfering and charging simultaneously. With OTG function easily enables your phones to read the data on USB flash disk.(Note: Please confirm that your phones will support OTG)