HG/T 21565-1995 Stirring drive device--installing the bottom cover HG/T21565-1995 standard download decompression password: www.bzxz.net

Installation bottom cover of stirring transmission device
HG21565-95
1 Subject content and scope of application
This standard specifies the type, size, technical requirements and use regulations of the installation bottom cover of stirring transmission device. This standard is applicable to stirring vessels with a design pressure of -0.1~1.6MPa (-1~16bar) and a design temperature of -20~+300℃, and is used to support the installation bottom cover of the frame, stuffing box, mechanical seal and other components. 39
GB4237
GB6654
JB/T4709
JB4726
JB4727
JB4728
HGJ 75
HG21537.7
HG21537.8
HG21563
HG21564
HG21566
HG 21567
HG21571
Cited standards
"High-quality carbon structural steel hot-rolled thick steel plates and wide steel strips" "Stainless steel hot-rolled steel plates"
"Carbon steel and low-alloy thick steel plates for pressure vessels" "Welding procedures for steel pressure vessels"
"Carbon steel and low-alloy steel forgings for pressure vessels" "Carbon steel and low-alloy steel forgings for low-temperature pressure vessels" "Stainless steel forgings for pressure vessels"
"Materials selection regulations for steel chemical containers" "Technical conditions for steel pipe flanges"
"Asbestos rubber sheet gaskets for steel pipe flanges" "Flexible graphite composite gaskets for steel pipe flanges" "Steel pipe flanges PTFE-coated gaskets" "Fasteners for steel pipe flanges"
"Stirring drive device-carbon steel stuffing box" "Stirring drive device-stainless steel stuffing box" "Stirring drive device system combination, selection and technical requirements" "Stirring drive device flange"
"Stirring drive device-single-pivot frame" "Stirring drive device double-pivot frame"
"Stirring drive device mechanical seal"
3 Installation of bottom cover, flange flange, frame, stuffing box (or mechanical seal) 3.0.1 The relationship between the installation of the bottom cover, flange flange, frame, stuffing box (or mechanical seal) shall be in accordance with the provisions of Figure 3.0.1-1.3.0.12.
Figure 3.0.1-1 shows the method of installing the bottom cover when the nominal diameter of the frame is the same as the nominal diameter of the flange.
Figure 3.0.1-2 shows the method of installing the bottom cover when the nominal diameter of the frame is smaller than the nominal diameter of the flange. Stuffing box (or mechanical seal)
Installation bottom cover
Flange flange
Figure 3.0.1-1
The nominal diameter of the frame is the same as the nominal diameter of the flange flange (the figure shows the top-mounted transmission shaft)
Stuffing box (or mechanical seal)
Installation bottom cover
Flange flange
Figure 3.0.1-2The nominal diameter of the frame is smaller than the nominal diameter of the flange flange (the figure shows the bottom-mounted transmission shaft)
3.0.2The commonly used matching relationship between the flange flange, installation bottom cover, frame, transmission shaft diameter (the shaft diameter through the stuffing box or mechanical seal part) and the mixing container diameter is as specified in Table 3.0.2. mm
Installation bottom
Nominal cover
(200)(200)
(200) /(200)
(200)(200)www.bzxz.net
Nominal frame diameter
Transmission shaft diameter
300300
（250)300)（300)
(200)（200)（250)
(300)(300)
5001500
[(250)|(300)|(300)（300)(400)(200)(200)|| tt||（200）（200）（250）（300）（300）（300）（400）400
Common Containers
Nominal Diameter
140160
500500
7007001700
700700700
700/7001700
Note: “+” indicates that this structure is geometrically impossible; the value in brackets indicates that this structure is not commonly used. ② The corresponding relationship between the nominal diameter of the container and the shaft diameter of the drive shaft, flange, and frame nominal diameter can be changed by the designer based on actual design experience.
4 Type and size of installation bottom cover
4.0.1 The type of installation bottom cover shall be in accordance with the provisions of Table 4.0.1 and Figures 4.0.1--1 to 4.0.1-4. Installation bottom cover type
Sealing surface type
Installation type of transmission shaft
Top mounting type (S)
Bottom mounting type (X)
Raised surface (R)
Lining (L)
Figure 4.0.1-1RS and LRS type installation bottom cover
Raised surface (M)
Lining (L)
Figure 4.0.1-2RX and LRX type installation bottom cover
LRX
Figure 4.0.1-3MS and LMS type installation bottom cover
Figure 4.0.1-4MX and LMX type installation bottom cover
4.0.2The overall dimensions of the installation bottom cover shall comply with the provisions of Figure 4.0.1-1~4 and Table 4.0.2-1~2. 44
Installation bottom cover
Frame nominal
Nominal diameter
Table 4.0.21
Threaded hole
Drive shaft diameter
Table 4.0.2-2
Threaded hole
Technical requirements
5.1 Materials
5.1.1 The parent material of the installation bottom cover shall be in accordance with the provisions of Table 5.1.1, and its chemical composition, mechanical properties and other requirements shall comply with the provisions of the relevant standards listed in Table 5.1.1
5.1.2 The lining layer material of the installation bottom cover shall be in accordance with the provisions of Table 5.1.1, and its chemical composition and properties shall comply with the provisions of the relevant standards listed in Table 5.1.1.
OC-18Ni9
00Cr19Ni10
oCri8Ni1ori
(1Cr1i8Ni9Ti)
OCr17Ni12Mo2
00Cr17Ni14Mo2
Note: 35 steel shall not be used for lining structure.
Standard No.
GB6654
GB6654
GB4237
(ioMnD)
oCr18Ni9
00Cr19Ni10
OCr18Ni10Ti
(1Cr18Ni9Ti)
OCr17Ni12Mo2
00Cr17Ni14Mo2
5.1.3 The use temperature of the material shall comply with the relevant standards and meet the requirements of 4.0.8 in HG21563. Parts
Standard No.
JB4726
(JB4727)
JB4726
(JB4727)
JB4726
JB4728
5.1.4 Forgings (including forged and rolled parts) shall be inspected and accepted in accordance with the requirements for Grade 1 forgings specified in JB4726, JB4727 and JB4728. When there are special requirements, they shall be inspected and accepted in accordance with the requirements of the drawings. 47
5.2 Dimension tolerance
5.2.1 The connection dimensions of the bottom cover and the tolerance of the thickness of the bottom cover shall comply with the provisions of HGJ66.5.2.2 The tolerance of the dimensions of the machined surface without tolerance shall comply with the provisions of IT14 of GB1804.5.2.3 The sealing surface of the bottom cover and the groove or boss of the mounting frame stuffing box (or mechanical seal) shall be concentric. Each threaded hole and bolt hole shall be perpendicular to the sealing surface of the bottom cover. The sealing surface and bolt holes of the bottom cover with lining shall be processed after the lining is welded.
5.3 Welding requirements for the lining layer of the bottom cover
5.3.1 Select the welding material according to the parent material of the bottom cover and the lining layer material in accordance with the provisions of HGJ15 and JB/T4709.
5.3.2 The weld surface shall not have defects such as cracks, pores, arc pits and slag inclusions. 5.4 Surface roughness and sealing surface requirements
5.4.1 The surface roughness of the bottom cover shall comply with the requirements of the drawings. 5.4.2 After the bottom cover is processed, anti-rust oil shall be applied to the sealing surface to prevent the sealing surface from being damaged. 48
Sealing gaskets and fasteners
6.0.1 The sealing gaskets between the bottom cover and the flange and sealing device (stuffing box or mechanical seal) shall be selected from asbestos rubber sheet gaskets (code XB), flexible graphite composite gaskets (code G), and polytetrafluoroethylene coated gaskets (code F), which shall meet the corresponding requirements of HGJ69, 70, and 71 respectively. If other types of gaskets are used, please indicate them when ordering. The thickness of the gaskets is 3mm.
6.0.2 The connecting fasteners between the bottom cover and the flange flange and the sealing device (stuffing box or mechanical seal) shall meet the relevant provisions of HGJ75. The stud material is 35# steel and the nut is 25# steel. If other fastener materials are used, please indicate them when ordering. 6.0.3 When the nominal diameter of the bottom cover is the same as that of the frame, the connecting fasteners between the bottom cover and the flange flange and the frame shall be long studs. When the nominal diameter of the frame is smaller than that of the bottom cover, the connecting fasteners between the bottom cover and the flange flange shall be short studs.
6.0.4 Install the fasteners that connect the bottom cover and the frame (when the nominal diameters are different) in accordance with the relevant provisions of HG21566 and HG21567.
HG21565-95 Bottom cover
7 Marking and marking examples
7.1 Marking
7.2 Marking examples
- Gasket code (see 6.0.1)
Lining layer material code (now Table 5.1.1)
Bottom cover material code (see Table 5.1.1)
Transmission shaft diameter d (rmm)
Frame nominal diameter (mm)
Bottom cover Nominal diameter (mm)
Installation bottom cover type (see Table 4.0.1)
Top-mounted lining raised surface installation bottom cover, nominal diameter 400, frame nominal diameter 300, transmission shaft diameter 80mm, bottom cover material 20, lining layer material OCr18Ni10Ti, gasket is polytetrafluoroethylene coated gasket, its mark is: HG21565-95 bottom cover
LRS400-300—80-—20/321--F4
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