CN109773377B - Installation method of heat exchange tube set and trapezoidal frame of PCS heat exchanger equipment - Google Patents
Installation method of heat exchange tube set and trapezoidal frame of PCS heat exchanger equipment Download PDFInfo
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- CN109773377B CN109773377B CN201811641215.6A CN201811641215A CN109773377B CN 109773377 B CN109773377 B CN 109773377B CN 201811641215 A CN201811641215 A CN 201811641215A CN 109773377 B CN109773377 B CN 109773377B
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Abstract
The invention discloses a method for installing a heat exchange tube group and a trapezoid frame, which comprises the following steps: assembling and welding the heat exchange tube set (2); adjusting the position of the heat exchange tube set (2); and installing a heat exchange pipe clamping sleeve (5) to finish installation. Wherein, the assembly welding of heat exchange tube group (2) includes: installing an adjusting device (1); and (3) placing the heat exchange tube set (2) on the adjusting device (1), and adjusting the position to complete the assembly welding of the heat exchange tube set (2). The method can realize the accurate installation of the heat exchange tube group and the trapezoid frame, and the heat exchange tube group is stably supported by adopting the adjusting device and can move in multiple directions and adjust the height and the angle of the heat exchange tube group. The adjusting device adopted by the method is ingenious in design, simple in structure and low in manufacturing cost, the method is easy to operate and high in universality, the position of a larger component in a narrow space can be accurately adjusted, the installation difficulty is reduced, and the installation accuracy is improved.
Description
Technical Field
The invention belongs to the field of pressure vessel manufacturing, relates to an installation method of a large plate type heat exchanger of nuclear power equipment, and particularly relates to an installation method of a heat exchange tube group and a trapezoidal frame of PCS heat exchanger equipment.
Background
The heat exchanger is widely applied to the industrial fields of chemical industry, petroleum, nuclear energy, power and the like. The PCS heat exchanger is a plate type heat exchanger in a Hua Long I nuclear power passive safety technology independently developed by China. The appearance of the equipment is similar to that of a solar water heater, the heat exchange tube is in an exposed form, and the equipment plays an important role in guiding out high-temperature steam heat generated by the cooling water tank in the containment vessel of the nuclear island.
The equipment structurally comprises a trapezoid steel structure frame, a left C-shaped heat exchange pipe group, a right C-shaped heat exchange pipe group, two tee joints for connecting the heat exchange pipe groups, a heat exchange pipe fixing clamping sleeve welded on the frame and used for fixing a heat exchange pipe and the like.
However, the adjustment of the position of the heat exchange tube set in the trapezoidal steel structure frame has the following difficulties: 1. the space inside the frame is narrow, and the C-shaped heat exchange tube is easy to collide with the frame to cause damage; 2. the heat exchange tube sets are large and heavy, and cannot be moved by manpower, and need to be transported and adjusted by a crown block, so that the resources of the crown block are occupied, and the two heat exchange tube sets are too close to each other, so that the two crown blocks cannot be operated simultaneously; and 3, welding the C-shaped heat exchange tube group and the three-way group in a whole circle, and performing nondestructive quality detection on a welding line after welding. But the installation size (h) from the edge of the tee joint to the frame is small, only 150mm exists, and the space is narrow, so that the requirements of welding and nondestructive testing cannot be met; 4, the position requirements of the C-shaped heat exchange tubes and the sloping beams are strict when the heat exchange tube clamping sleeves are installed on the C-shaped heat exchange tubes and the sloping beams, the inclination angles (alpha) of the C-shaped heat exchange tubes and the sloping beams are the same, and two rows of the C-shaped heat exchange tubes are arranged at the central positions of the sloping beams, otherwise, the clamping sleeve fixing plates cannot be welded with the sloping beams, and the heat exchange tube groups can generate elastic deformation if being lifted by a crown block, so that the installation of the heat exchange; 5. when the trapezoid steel structure frame is manufactured, the beams are fixedly connected through welding, the large welding amount of the trapezoid steel structure frame is large, and the welding can generate thermal shrinkage deformation within a tolerance range. When the heat exchange tube group is installed, the heat exchange tube group needs to be properly adjusted according to the deformation of the frame. From the above problems it can be seen that adjusting the position of the C-shaped heat exchange tube set is a delicate and complex process and there is a great risk.
Therefore, in view of the above problems, it is desirable to design a method for installing a heat exchange tube set and a trapezoid frame, so as to reduce the installation difficulty and improve the installation accuracy.
Disclosure of Invention
In order to overcome the problems, the inventor of the present invention has made an intensive study to design a method for installing a heat exchange tube group and a trapezoid frame, in which after the trapezoid frame is manufactured, the heat exchange tube group is assembled and welded, and then the height and angle of the heat exchange tube group are integrally adjusted by an adjusting device, so as to achieve the precise installation of the heat exchange tube group and the trapezoid frame. The method has the advantages that the adopted adjusting device is ingenious in design, simple in structure and low in manufacturing cost, the method is easy to operate and high in universality, the position of a larger component in a narrow space can be accurately adjusted by adopting the method, the installation difficulty is reduced, and the installation accuracy is improved, so that the method is completed.
The invention aims to provide a method for installing a heat exchange tube group and a trapezoid frame, which comprises the following steps:
step 1, assembling and welding a heat exchange tube set;
and step 3, installing a heat exchange tube clamping sleeve.
In step 1, the assembly welding of the heat exchange tube set comprises the following steps:
step 1', mounting an adjusting device;
and 2', arranging the heat exchange tube group on an adjusting device, and adjusting the position to complete assembly welding.
In the step 1', a first adjusting trolley and a second adjusting trolley are respectively arranged outside and inside the trapezoid frame and are connected by a connecting beam;
in the step 2', the first pipe box and the second pipe box of the heat exchange pipe set are respectively arranged on the first adjusting trolley and the second adjusting trolley, and the height and the horizontal position of the heat exchange pipe set are adjusted to complete the assembly welding of the heat exchange pipe set.
In the step 2, after the heat exchange tube set is welded, the heat exchange tube set is moved by using the adjusting device.
In the step 2, the heights of the first pipe box and the second pipe box of the heat exchange pipe set are adjusted, so that the inclination angle of the straight pipe section of the heat exchange pipe set is the same as that of the inclined beam.
In the step 2, the oblique beam is H-shaped steel with two wing plates, and the plane where the straight pipe section of the heat exchange pipe group is located between the planes where the two wing plates of the oblique beam are located.
In the step 3, the heat exchange tube clamping sleeve comprises a fixing plate, a toothed plate and a partition plate, the toothed plate is provided with tooth sockets, the number of the tooth sockets is equal to that of each layer of heat exchange tubes, and the tooth sockets are preferably U-shaped.
In the step 3, the partition plate is arranged between the two layers of heat exchange tubes, the two layers of heat exchange tubes are clamped and fixed by the toothed plate, the heat exchange tubes are positioned in tooth grooves of the toothed plate, and the central line of the preferred U-shaped tooth groove arc coincides with the central line of the inner heat exchange tube.
In step 3, connecting the two ends of the toothed plate with a fixed plate, preferably a bolt,
and connecting the fixed plate with the oblique beam, preferably welding the fixed plate with the two wing plates of the oblique beam, and finishing the installation of the heat exchange tube group and the trapezoidal frame.
In the step 3, the welding position (C) of the oblique beam and the fixed plate is not more than 10mm, 1 to more groups of parallel clamping sleeves are arranged on the heat exchange tube group and are vertical to the oblique beam, the clamping sleeves are installed on the oblique tube sections of the heat exchange tube group, and the distances between the clamping sleeves of the straight tube sections of the heat exchange tube are equal.
The invention has the following beneficial effects:
1. the installation method of the heat exchange tube group and the trapezoid frame can stably support and slowly move the heat exchange tube group in the frame through manpower under the condition of not interfering with the equipment frame, avoids collision and deformation caused by crown block operation, and saves resources such as crown blocks, special rigging tools and the like;
2. the method provided by the invention adjusts the displacement of the C-shaped heat exchange tube group in each direction through the adjusting wheel, adjusts the height and the angle of the heat exchange tube group through the screw rod body, can integrally move the heat exchange tube group to an operable area with a wide space for manufacturing and then integrally reset under the condition that the space is narrow and the operation cannot be performed, and can still ensure high installation precision under the condition that tolerance errors exist in the manufacturing process of an equipment frame, and is easy to operate;
3. according to the method provided by the invention, the two adjusting trolleys of the adopted adjusting device are fixedly connected through the connecting beam provided with the round hole and the waist-shaped hole, and the tolerance error of the horizontal distance between the C-shaped heat exchange tube group and the tube box can be compensated through the adjustment of the waist-shaped hole;
4. the adjusting device adopted by the method is composed of a simple mechanical structure, does not need assistance of a hydraulic and electric control system, is ingenious in design, simple in structure and low in manufacturing cost, is easy to operate and high in practicability, can realize accurate adjustment of the position of a larger component in a narrow space through the simple mechanical structure, greatly reduces the installation difficulty of the heat exchange tube set and the trapezoidal frame, and improves the installation accuracy.
Drawings
FIG. 1a shows a three-dimensional view of a PCS heat exchanger device configuration;
FIG. 1b shows a side view of a PCS heat exchanger device configuration;
FIG. 2 shows a schematic section A-A of FIG. 1 a;
FIG. 3a shows a front view of a heat exchange tube bank;
FIG. 3b shows a top view of the heat exchange tube bank;
fig. 4 shows a three-dimensional schematic view of a heat exchange tube bank and a precise adjustment device for the heat exchange tube bank;
FIG. 5 is a schematic front view of the precise adjustment device for the heat exchange tube set for adjusting the welding position of the tee in the trapezoid frame;
FIG. 6 is a three-dimensional schematic diagram of the precise adjusting device for the heat exchange tube set for adjusting the welding position of a tee joint in a trapezoid frame;
FIG. 7a shows a front view of a first adjustment trolley of a preferred embodiment of the invention;
FIG. 7b shows a side view of a first adjustment trolley of a preferred embodiment of the invention;
FIG. 8a shows a schematic structural view of a V-shaped support housing of a preferred embodiment of the present invention;
FIG. 8b shows a cross-sectional view A-A of the V-shaped support housing of the preferred embodiment of the present invention;
FIG. 9 shows a schematic view of a support screw of a preferred embodiment of the present invention;
FIG. 10a shows a front view of a lead screw mount of a preferred embodiment of the present invention;
FIG. 10B shows a cross-sectional view B-B of the lead screw housing of the preferred embodiment of the present invention;
FIG. 10c shows a three-dimensional schematic view of a screw mount of a preferred embodiment of the present invention;
FIG. 11a shows a top view of the base plate of the preferred embodiment of the present invention;
FIG. 11b shows a left side view of the base plate of the preferred embodiment of the present invention;
fig. 12a shows a top view of a connection beam of a preferred embodiment of the invention;
FIG. 12b shows a left side view of a coupling beam of a preferred embodiment of the present invention;
fig. 13a shows a front view of the heat exchange tube bank support base;
fig. 13b shows a three-dimensional schematic view of the heat exchange tube set supporting seat.
The reference numbers illustrate:
the 1-C-shaped heat exchange tube group precise adjusting device;
1-1-a first conditioning trolley;
1-1' -a second conditioning trolley;
1-1-1-V shaped support cover;
1-1-1-1-V shaped plate;
1-1-1-2-short pipe;
1-1-2-support lead screw;
1-1-3-lead screw seat;
1-1-3-1-thread (M) seat;
1-1-3-2-support column;
1-1-4-horizontal supporting tube;
1-1-5-longitudinal support tube;
1-1-6-bottom plate;
1-1-7-adjustment wheel;
1-2-connecting beam;
1-3-connecting bolts and nuts;
2-heat exchange tube group;
2-1-heat exchange tube;
2-2-a first tube box;
2-2' -a second tube box;
2-3-spherical end socket;
3-a ladder frame;
3-1-oblique beam;
3-1-1-wing plate
3-2-straight beam;
3-3-heat exchange tube group supporting seat;
3-3-1-arc plate;
3-3-2-short supporting tube;
3-3-3-connecting plate;
4-a tee joint;
5-clamping sleeve of heat exchange tube;
alpha-cant beam inclination angle;
a-horizontal distance between a first tube box and a second tube box of the heat exchange tube group;
b, height difference of the first tube box and the second tube box of the heat exchange tube group;
c, welding positions of the cutting sleeve fixing plate and the oblique beam;
the ideal welding distance is reserved between the edge of the H-C-shaped heat exchange tube group tube box and the frame;
the actual installation distance between the edge of the h-C-shaped heat exchange tube group tube box and the frame is short;
l-lead screw seat support column length.
Detailed Description
The invention is explained in more detail below with reference to the drawings and preferred embodiments. The features and advantages of the present invention will become more apparent from the description.
The invention provides an installation method of a heat exchange tube group and a trapezoid frame, wherein the heat exchange tube group is preferably a C-shaped heat exchange tube group, and the trapezoid frame is preferably a trapezoid steel structure frame.
In the invention, as shown in fig. 1a and fig. 1b, the PCS heat exchanger device is composed of a trapezoidal frame 3, C-shaped heat exchange tube sets 2 on the left and right sides, two tee joints 4 connected with the C-shaped heat exchange tube sets 2, a heat exchange tube fixing clamp sleeve 5 welded on the frame 3 and used for fixing a heat exchange tube 2-1, and the like.
The trapezoid frame 3 is formed by assembling and welding 200 x 200H-shaped steel, and the overall specification is as follows: 2000m multiplied by 5000mm multiplied by 5300mm and used for fixing the C-shaped heat exchange tube group 2. The frame 3 comprises an oblique beam 3-1 and a straight beam 3-2. The PCS heat exchanger device is in use with the straight beam 3-2 perpendicular to the reference platform as shown in fig. 1a and 1 b. When the C-shaped heat exchange tube group 2 is installed, the straight beam 3-2 is parallel to the reference platform.
The C-shaped heat exchange tube group is a heat exchange assembly of a large-scale heat exchanger, wherein the C-shaped heat exchange tube group 2 comprises two groups which are bilaterally symmetrical, each group comprises a plurality of parallel C-shaped heat exchange tubes 2-1, two ends of the plurality of parallel C-shaped heat exchange tubes 2-1 are respectively connected and communicated through a first tube box 2-2 and a second tube box 2-2 ' to form a heat exchange unit, namely the left side or the right side of the heat exchange tube group, one end of each of the first tube box 2-2 and the second tube box 2-2 ' is provided with a spherical end socket 2-3, and the other end of each of the first tube box 2-2 and the second tube box 2-2 ' is connected with the other C-shaped heat exchange tube group.
From the view of equipment manufacturing process, the left and right C-shaped heat exchange tube sets 2 are fixedly connected with the trapezoidal steel structure frame 3 after being butted with the two tee joints 4 to form an integral heat exchange system. However, due to the structural limitation of the frame 3, one of the three-way joints 4 interferes with the oblique beam 3-1 of the frame, and the heat exchange system cannot be transported into the frame 3. Therefore, the frame oblique beam 3-1 manufactured according to the process needs to be installed and welded after the heat exchange tube 2-1 group is integrally placed on the inner side of the frame 3.
And the later installation of the oblique beam 3-1 can cause the following problems: 1, the installation position of the C-shaped heat exchange tube group 2 in the frame 3 is tightly attached to the oblique beam 3-1 of the frame, the welding space is narrow, and the installation and welding difficulty is high; 2. slag splashing can be generated when the frame oblique beam 3-1 and the frame 3 are welded, the frame 3 is painted at the moment, the paint surface can be damaged by welding and splashing, the surface of the heat exchange tube 2-1 has strict cleaning requirements, the heat exchange tube is not allowed to be in contact with the splashed slag, and the avoidance is difficult; 3. in order to ensure the installation of the clamping sleeve 5, the requirement on the inclination angle alpha of the oblique beam 3-1 is accurate, the angle is required to be positioned in advance, the oblique beam 3-1 plays an important role in preventing welding deformation in the manufacturing of the frame 3, and the later installation is difficult to ensure the size requirement of the oblique beam 3-1 after welding, so the frame oblique beam 3-1 is not suitable for subsequent installation.
According to the invention, a reasonable process method for accurately installing the C-shaped heat exchange tube set and the trapezoidal steel structure frame 3 comprises the following steps: after the integral manufacture of the trapezoid steel structure frame 3 is finished, the trapezoid steel structure frame is horizontally placed, and the oblique beam 3-1 is upward. The left and right C-shaped heat exchange tube sets 2 are independently transported to the inner side of the frame 3, the C-shaped heat exchange tube sets 2 are connected with the two tee joints 4 in the frame, then the positions of the left and right heat exchange tube sets 2 are integrally adjusted, heat exchange tube clamping sleeves 5 are installed, and the left and right C-shaped heat exchange tube sets 2 and the frame 3 are installed and fixed.
According to the present invention, the present invention provides a method for installing a heat exchange tube group and a ladder frame, the method comprising the steps of:
step 1, assembling and welding a heat exchange tube group (2);
according to the invention, in step 1, the assembly welding of the heat exchange tube set comprises the following steps:
step 1', installing an adjusting device (1);
and 2', placing the heat exchange tube set (2) on the adjusting device (1), and adjusting the position to complete assembly welding.
According to the invention, in step 1 ', a first adjusting trolley (1-1) and a second adjusting trolley (1-1') are respectively arranged outside and inside the ladder-shaped frame and are connected by a connecting beam (1-2);
in the step 2 ', a first pipe box (2-2) and a second pipe box (2-2 ') of the heat exchange pipe set are respectively arranged on a first adjusting trolley (1-1) and a second adjusting trolley (1-1 '), the height and the horizontal position of the heat exchange pipe set (2) are adjusted, and the assembly welding of the heat exchange pipe set (2) is completed.
According to the invention, in the step 1', the trapezoidal steel structure frame (3) is horizontally placed on a reference platform.
According to the invention, in the step 1', the manufactured trapezoid steel structure frame 3 is horizontally placed on a reference platform, the inclined beam 3-1 faces upwards, and the position of the frame 3 is adjusted until the vertical beam 3-2 is parallel to the reference platform;
in the invention, when the C-shaped heat exchange tube group and the trapezoid steel structure frame are installed, the C-shaped heat exchange tube group is connected with two groups of left and right symmetrical tubes, and the two groups of left and right symmetrical tubes are connected by adopting a tee joint to complete the installation of the C-shaped heat exchange system.
According to the invention, in the step 1 ', firstly, the trapezoidal steel structure frame 3 is horizontally placed on a reference platform to facilitate the assembly and welding installation of the C-shaped heat exchange tube set, and then the first adjusting trolley 1-1 and the second adjusting trolley 1-1' of the adjusting device 1 are respectively placed outside and inside the frame 3.
According to the invention, the position of the C-shaped heat exchange tube group 2 is adjusted by adopting the C-shaped heat exchange tube group adjusting device 1, the spatial position of the C-shaped heat exchange tube group in the vertical, front, rear, left and right directions is adjusted, two groups of C-shaped heat exchange tube groups 2 which are symmetrical left and right are assembled and welded, and the C-shaped heat exchange tube group 2 and the trapezoid steel structure frame 3 are accurately installed.
According to the invention, in step 1 ', the adjusting device 1 comprises a first adjusting trolley 1-1 and a second adjusting trolley 1-1', and the adjusting device 1 can play a role in supporting the C-shaped heat exchange tube set and adjusting the spatial position of the C-shaped heat exchange tube set.
According to the invention, a first adjusting carriage 1-1 and a second adjusting carriage 1-1' are arranged in parallel.
According to the invention, the adjusting device 1 further comprises a connecting beam 1-2, and two ends of the connecting beam 1-2 are respectively connected with the first adjusting trolley 1-1 and the second adjusting trolley 1-1'.
According to the invention, more than two connecting beams 1-2, preferably two connecting beams 1-2 are arranged between the first adjusting trolley 1-1 and the second adjusting trolley 1-1 ', and after the connecting beams 1-2 are connected, the first adjusting trolley 1-1 and the second adjusting trolley 1-1' and the two connecting beams 1-2 form a rectangular frame.
According to the invention, a first adjusting trolley 1-1 and a second adjusting trolley 1-1' are respectively connected with a connecting beam 1-2 through bolts and nuts.
According to the invention, the first adjusting trolley 1-1 comprises a supporting structure for supporting the first pipe box 2-2 of the C-shaped heat exchange pipe group and adjusting wheels 1-1-7 capable of enabling the C-shaped heat exchange pipe group to freely move in a horizontal position.
According to the invention, as shown in fig. 7b, the first adjustment trolley 1-1 further comprises a base plate 1-1-6, the support structure is located at the upper part of the base plate 1-1-6, and the adjustment wheels 1-1-7 are located at the lower part of the base plate 1-1-6.
According to the invention, the support structure is connected to the base plate 1-1-6, preferably by welding or by means of bolts and nuts.
According to the invention, the adjusting wheel 1-1-7 is connected to the base plate 1-1-6, preferably by welding or screwing.
According to the invention, the adjusting wheels 1-1-7 are preferably universal wheels, which are freely rotatable in all horizontal directions. The adjusting wheels 1-1-7 adjust the butt joint of the C-shaped heat exchange tube set and the tee joint 4 by moving the C-shaped tube heat exchange set and are arranged on the trapezoid steel structure frame 3.
According to the invention, the first adjustment trolley 1-1 is provided with two side-by-side support structures, which comprise height-adjustable screw bodies.
According to the invention, as shown in fig. 7b, the spiral lead screw body comprises a V-shaped support cover 1-1-1, a support lead screw 1-1-2 and a lead screw seat 1-1-3.
According to the invention, as shown in fig. 9, the support screw 1-1-2 is provided with a spherical support head at one end, a thread (M) at the other end and a through hole, preferably a rotary through hole, in the middle. After the supporting lead screw 1-1-2 is screwed into the lead screw seat 1-1-3, the rotating height of the supporting lead screw 1-1-2 in the lead screw seat 1-1-3 can be adjusted by inserting a lever into a rotating through hole of the supporting lead screw 1-1-2, the height of the spiral lead screw is adjusted, the height of the first adjusting trolley 1-1 is further adjusted, the height of the C-shaped heat exchange tube group is adjusted, and therefore the heat exchange tube clamping sleeve 5 of the C-shaped heat exchange tube group and the frame oblique beam 3-1 of the trapezoid steel structure frame 3 are accurately installed.
According to the invention, as shown in fig. 10a, 10b and 10c, one end of the screw rod seat 1-1-3 is provided with a thread (M) block 1-1-3-1 matched with the support screw rod 1-1-2, and the thread (M) block 1-1-3-1 is in threaded connection with the support screw rod 1-1-2, so that the connection between the screw rod seat 1-1-3 and the support screw rod 1-1-2 is realized.
According to the invention, the other end of the screw seat 1-1-3 is provided with the support column 1-1-3-2 and the base, the support column 1-1-3-2 is fixedly connected with the base, preferably welded, and a rib plate is preferably arranged between the support column 1-1-3-2 and the base, so that the strength of the support component is enhanced.
According to the invention, the length of the support column 1-1-3-2 is larger than the stroke of the screw rod rotation, and the support tube 1-1-3-2 can be set to different lengths according to the use requirement.
According to the invention, the base is plate-shaped, preferably rectangular plate-shaped, and the axis of the support tube 1-1-3-2 is perpendicular to the upper surface of the base.
According to the invention, the base of the spindle base 1-1-3 is connected, preferably fixedly, to the base plate 1-1-6, for example welded.
According to the invention, as shown in fig. 8a and 8b, the V-shaped support cage 1-1-1 comprises a V-shaped plate 1-1-1-1 and a pipe stub 1-1-1-2.
According to the invention, the inner diameter of the short pipe 1-1-1-2 is slightly larger than the outer diameter of the spherical supporting head of the supporting screw rod 1-1-2. The other end of the short pipe 1-1-1-2 is sleeved outside the spherical end of the support screw 1-1-2.
According to the invention, the upper surface of the V-shaped plate 1-1-1-1 can be attached to the outer surface of the first tube box 2-2 of the C-shaped heat exchange tube group so as to support the first tube box 2-2 of the C-shaped heat exchange tube.
According to the invention, one end of the short pipe 1-1-1-2 is provided with a V-shaped groove matched with the V-shaped plate 1-1-1-1, the V-shaped plate 1-1-1 is arranged on the V-shaped groove of the short pipe 1-1-1-2, preferably fixedly connected with the V-shaped groove, and the angle of the V-shaped groove and the angle of the C-shaped heat exchange pipe group pipe box 2-2 can be stably arranged on the V-shaped plate 1-1-1-1 of the two support structures.
According to the invention, the V-shaped support cover 1-1-1 is fixedly connected with the support screw 1-1-2, and preferably, the short pipe 1-1-1-2 is sleeved on the spherical support head of the support screw 1-1-2, so that the V-shaped support cover 1-1-1 cannot rotate along with the support screw 1-1-2 when the support screw 1-1-2 is rotated, thereby ensuring that the first pipe box 2-2 cannot rotate randomly.
The inventors have found that in order to ensure the stability and strength of the adjustment trolley, the strength of the connection of the support structure to the base plates 1-1-6 needs to be reinforced.
According to the invention, the supporting structure also comprises a transverse supporting tube 1-1-4 for transversely supporting the screw rod seat 1-1-3 and a longitudinal supporting tube 1-1-5 for longitudinally supporting the screw rod seat 1-1-3. Preferably, the horizontal support tubes 1-1-4 and the vertical support tubes 1-1-5 are general steel tubes. The transverse supporting tubes 1-1-4 and the longitudinal supporting tubes 1-1-5 realize the enhancement of the strength of the adjusting trolley and ensure the stability of the structure of the adjusting trolley, thereby realizing the accurate installation of the C-shaped heat exchange tube group.
According to the invention, two ends of the transverse supporting tubes 1-1-4 are respectively connected with the supporting columns 1-1-3-2 of the screw rod seats 1-1-3 of the two supporting structures.
According to the invention, each supporting structure is at least provided with a pair of longitudinal supporting tubes 1-1-5 which are in a symmetrical structure, one end of each longitudinal supporting tube 1-1-5 is connected with the supporting column 1-1-3-2 of the screw seat 1-1-3, preferably welded, and the other end is connected with the bottom plate 1-1-6, preferably welded.
According to the invention, the support structure is connected to the upper surface of the base plate 1-1-6 via a base, preferably the base is fixedly connected to the base plate 1-1-6, welded or bolted and screwed.
According to the invention, the first adjustment trolley 1-1 and the second adjustment trolley 1-1' have the same structure. The first adjusting trolley 1-1 and the second adjusting trolley 1-1 ' can be different in size, and the C-shaped heat exchange tube group 2 and the trapezoid steel structure frame 3 need to be installed, so that the inclination angle of the straight tube section of the C-shaped heat exchange tube group 2 needs to be the same as the inclination angle alpha of the frame oblique beam 3-1, and therefore the height of the second tube box 2-2 ' is higher than that of the first tube box 2-2, and the maximum height of the second adjusting trolley 1-1 ' is higher than that of the first adjusting trolley 1-1 according to actual needs. Specifically, the sizes of the spiral screw bodies of the first adjusting trolley 1-1 and the second adjusting trolley 1-1 ' are adjusted according to actual needs, and after the second pipe box 2-2 ' falls on the second adjusting trolley 1-1 ' and the first pipe box 2-2 falls on the first adjusting trolley 1-1, the included angle (namely the inclination angle) between the straight pipe section of the C-shaped heat exchange pipe group 2 and the horizontal reference platform is not smaller than the inclination angle alpha.
According to the invention, both ends of the connecting beam 1-2 are respectively connected with the bottom plates 1-1-6 of the first adjusting trolley 1-1 and the second adjusting trolley 1-1'. Preferably, the two bottom plates 1-1-6 are arranged in parallel, and the two bottom plates 1-1-6 are connected at least by more than two parallel connecting beams 1-2;
according to the invention, the bottom plate 1-1-6 is provided with through holes, preferably two sets of through holes, each set having at least two through holes, preferably circular through holes, for connection to the connecting beam 1-2, as shown in fig. 11a and 11 b.
According to the invention, the bottom plate 1-1-6 is rectangular plate-shaped, and two groups of through holes on the bottom plate 1-1-6 are arranged in axial symmetry.
According to the present invention, as shown in fig. 12a and 12b, one end of the coupling beam 1-2 is provided with a circular through hole and the other end is provided with a kidney-shaped hole. The connecting beam 1-2 is a channel steel with a specific length.
According to the invention, the lower part of each bottom plate 1-1-6 is connected with four universal wheels 1-1-7, so that the adjustment trolley can move in all directions on a plane.
According to the invention, as shown in fig. 4 and 5, the bottom plates 1-1-6 of the first adjusting trolley 1-1 and the second adjusting trolley 1-1 ' are connected with the two connecting beams 1-2 to form a four-point supporting device capable of moving integrally, and the length of the connecting beams 1-2 is such that the distance between two groups of spiral screw rod bodies of the first adjusting trolley 1-1 and the second adjusting trolley 1-1 ' is equal to the horizontal placement distance (A) between the first tube box 2-2 and the second tube box 2-2 ' of the C-shaped heat exchange tube 2-1 group. When manufacturing errors exist in the distance, the sizes of the spiral screw rod bodies of the first adjusting trolley 1-1 and/or the second adjusting trolley 1-1' can be adjusted through the waist-shaped hole to make up the errors, and the adjusting device can stably support the C-shaped heat exchange tube group 2.
According to the invention, when the C-shaped heat exchange tube group 2 is horizontally placed, the horizontal height difference (B) between the first tube box 2-2 and the second tube box 2-2 'can be adjusted through the support lead screw 1-1-2 of the first adjusting trolley 1-1 and the second adjusting trolley 1-1', and when the rotation stroke of the lead screw cannot meet the height difference, the horizontal support of the C-shaped heat exchange tube group 2 by the adjusting device can be realized by changing the length (L) of the support column 1-1-3-2 on the adjusting trolley 1-1 and matching with the adjustment of the lead screw. When the height and width distances of two groups of supporting screw rods 1-1-2 of the device are well adjusted, after a first tube box 2-2 and a second tube box 2-2 'of a C-shaped heat exchange tube group 2 are placed in V-shaped grooves of 4V-shaped plates 1-1-1, the height (B) and width (A) distances between the first tube box 2-2 and the second tube box 2-2' are fixed, and the inclination angles alpha of the heat exchange tubes 2-1 and an oblique beam 3-1 of a trapezoid steel structure frame are the same. At the moment, the C-shaped heat exchange tube group 2 can move in multiple directions and adjust the height and the angle on the adjusting device, and the support form of the device can not cause the deformation of the C-shaped heat exchange tube 2-1.
In the invention, in step 1 ', when the C-shaped heat exchange tube sets on the left and right sides are assembled and welded, two sets of adjusting devices 1 are required, because when the C-shaped heat exchange tube sets are installed on the frame 3, the first tube box 2-2 of the C-shaped heat exchange tube set 2 is outside the frame 3, and the second tube box 2-2' is inside the frame 3, as shown in fig. 6.
According to the invention, in step 1', a first conditioning trolley 1-1 is placed at the front end of the frame 3, preferably transported to the front end of the frame 1-1; the second adjustment trolley 1-1' is placed inside the frame 3, preferably by crane.
According to the invention, in the step 1 ', after the adjusting trolley is placed, the actual horizontal distance (A) between the upper and lower tube boxes of the C-shaped heat exchange tube group 2 is measured, and the first adjusting trolley 1-1 and the second adjusting trolley 1-1 ' are placed at proper positions according to the distance, preferably, the transverse support tubes 1-1-4 of the first adjusting trolley 1-1 and the second adjusting trolley 1-1 ' are parallel.
According to the invention, in the step 1 ', the straight line of the bottom end of the V-shaped plate of the first adjusting trolley 1-1 is parallel to the straight line of the bottom end of the V-shaped plate of the second adjusting trolley 1-1 ', and the horizontal distance between the straight lines is equal to the horizontal distance between the axes of the first channel 2-2 and the second channel 2-2 ', so that the first channel 2-2 can be placed on the first adjusting trolley 1-1, the outer wall of the first channel 2-2 can be attached to the upper surface of the V-shaped plate of the first adjusting trolley 1-1, the second channel 2-2 ' can be placed on the second adjusting trolley 1-1 ', and the outer wall of the first channel 2-2 ' can be attached to the upper surface of the V-shaped plate of the second adjusting trolley 1-1 '.
According to the invention, in step 1', the first adjusting carriage 1-1 and the second adjusting carriage 1-2 are connected by two connecting beams 1-2 according to the actual horizontal distance (A) to complete the installation of the adjusting device 1
According to the invention, two ends of the connecting beam 1-2 are respectively connected with two bottom plates 1-1-6 of the first adjusting trolley 1-1 and the second adjusting trolley 1-1 ', preferably more than two connecting beams 1-2 are arranged between the first adjusting trolley 1-1 and the second adjusting trolley 1-1',
according to the invention, one end of the connecting beam 1-2 is provided with a circular through hole, the other end of the connecting beam is provided with a waist-shaped hole, the bottom plate 1-1-6 is provided with a through hole, and the connecting beam 1-2 is connected with the bottom plate 1-1-6 through bolts and nuts.
In the invention, the bottom plates 1-1-6 of the first adjusting trolley 1-1 and the second adjusting trolley 1-1 ' are connected with the two connecting beams 1-2 to form a four-point supporting device capable of moving integrally, and the length of the connecting beams 1-2 is required to enable the distance between two groups of spiral screw rod bodies of the first adjusting trolley 1-1 and the second adjusting trolley 1-1 ' to be equal to the horizontal placement distance (A) (namely the actual horizontal distance) of the first tube box 2-2 and the second tube box 2-2 ' of the C-shaped heat exchange tube 2-1 group. When manufacturing errors exist in the distance, the sizes of the spiral screw rod bodies of the first adjusting trolley 1-1 and/or the second adjusting trolley 1-1' can be adjusted through the waist-shaped hole to make up the errors, and the adjusting device can stably support the C-shaped heat exchange tube group 2.
According to the invention, in step 2 ', the left and right C-shaped heat exchange tube sets 2 are hoisted and placed on the adjusting device of the invention, as shown in fig. 4 and 5, specifically, the first tube box 2-2 of the C-shaped heat exchange tube set is attached to the upper surface of the V-shaped plate on the V-shaped support cover of the first adjusting trolley 1-1, the second tube box 2-2 ' of the C-shaped heat exchange tube set is attached to the surface of the V-shaped plate on the V-shaped support cover of the second adjusting trolley 1-1 ', and therefore, the position of the C-shaped heat exchange tube set 2 can be adjusted by the adjusting device of the invention.
According to the invention, the height and the position of the left and right C-shaped heat exchange tube sets are adjusted by adopting the adjusting device 1, the first tube box 2-2 and the second tube box 2-2 ' of the left and right C-shaped heat exchange tube sets are adjusted to be the same height by moving the adjusting device 1 forwards and backwards and adjusting the spiral screw rod body on the trolley, the first adjusting trolley 1-1 and the second adjusting trolley 1-1 ' are moved by adjusting wheels 1-1-7, so that a certain distance is kept between the first tube box 2-2 and the second tube box 2-2 ' and the frame 3, for example, the adjusting device 1 is moved to increase the distance between the first tube box 2-2 and the edge of the frame 3, thereby ensuring the welding space of workers, the tube box is provided with a tee joint 4, the distance between the two groups of C-shaped heat exchange tube sets 2 is adjusted to meet the welding requirement of the tee joint 4, and (3) completing the welding of the tee joint 4 and performing nondestructive testing, and completing the connection of the tee joint 4 and the C-shaped heat exchange tube group 2, as shown in fig. 6.
According to the invention, the left and right C-shaped heat exchange tube sets 2 are connected through the tee joint 4, the height of the C-shaped heat exchange tube set 2 is adjusted through the spiral screw rod bodies of the first adjusting trolley 1-1 and the second adjusting trolley 1-1', the horizontal position of the C-shaped heat exchange tube set 2 is adjusted through the movement of the adjusting wheels 1-1-7, the tee joint 4 is butted with two tube boxes of the C-shaped heat exchange tube set 2, and then welding is carried out, so that the assembly welding of the left and right C-shaped heat exchange tube sets 2 is completed.
And 2, adjusting the position of the heat exchange tube set (2).
According to the invention, in step 2, the height and angle of the C-shaped heat exchange tube set are adjusted.
According to the invention, in step 2, after the assembly welding of the heat exchange tube set 2 is completed, the heat exchange tube set 2 is moved by the adjusting device 1.
In the invention, when the PCS heat exchange equipment is used, the trapezoidal frame 3 needs to be vertically placed, so that the straight beam 3-2 is vertical to the horizontal reference platform, as shown in figures 1a and 1 b.
According to the invention, the ladder frame 3 is provided with a heat exchange tube group support base 3-3 for vertically supporting a first tube box 2-2 and a second tube box 2-2' of the heat exchange tube group 2 when the ladder frame 3 is placed vertically, as shown in fig. 1a, 1b, 13a and 13 b.
According to the invention, as shown in fig. 13a and 13b, one end of the heat exchange tube set supporting seat 3-3 is a connecting plate 3-3-3 connected with the ladder frame 3, preferably fixedly connected, such as bolted connection or welded connection; the other end of the heat exchange tube group supporting seat 3-3 is an arc plate 3-3-1, the arc plate 3-3-1 is arc-shaped, the arc plate 3-3-1 is used for supporting the first tube box 2-2 and the second tube box 2-2', preferably the arc plate 3-3-1 is welded with the heat exchange tube group tube box, and the arc plate 3-3-1 and the connecting plate 3-3-3 are connected through a short supporting tube 3-3-2, preferably fixedly connected through welding.
According to the invention, the supporting height of the heat exchange tube group supporting seat 3-3 is h, namely the distance between the upper surface of the arc-shaped plate and the lower surface of the connecting plate, as shown in fig. 13 a.
According to the invention, in the step 2, after the assembly welding of the heat exchange tube group is completed, the adjusting device is utilized to move the heat exchange tube group 2, so that the first tube box 2-2 and the second tube box 2-2 'are attached to the upper surface of the arc plate 3-3-1, the distance between the first tube box 2-2 and the outer edge of the trapezoid frame 3 is h, the arc plate 3-3-1 of the heat exchange tube group supporting seat 3-3 is welded with the outer walls of the first tube box 2-2 and the second tube box 2-2', and then the adjusting device 1 is utilized to move the heat exchange tube group 2 to the supporting seat connecting plate 3-3-3 to be attached to the outer wall of the trapezoid frame 3 and fixedly connected with the outer wall of the trapezoid frame 3.
The height and the angle of the heat exchange tube sets 2 at the two sides are adjusted according to the position of the frame oblique beam 3-1 and the installation requirement of the heat exchange tube clamp sleeve 5.
In the invention, in the step 2, if the height and the angle of the oblique beam 3-1 have deviation within the tolerance range when the frame 3 is welded, the height of the support screw 1-1-2 is adjusted until the heat exchange tube 2-1 is matched with the oblique beam 3-1, so that the inclination angle of the straight tube section of the heat exchange tube group is the same as the inclination angle alpha of the oblique beam 3-1 of the frame, and the installation of the heat exchange tube cutting sleeve 5 is met. And then installing a heat exchange tube clamping sleeve 5, fixedly connecting the fixing plate 5-1 with the oblique beam 3-1, preferably welding, and finishing the fixedly connecting of the C-shaped heat exchange tube group 2 and the frame 3.
According to the invention, in the step 2, the heights of the first tube box 2-2 and the second tube box 2-2' of the heat exchange tube group are adjusted, so that the inclination angle of the straight tube section of the heat exchange tube 2 of the heat exchange tube group 2 is the same as the inclination angle of the inclined beam 3-1.
According to the invention, in the step 2, the oblique beam 3-1 is H-shaped steel with two wing plates 3-1-1, and the plane of the straight pipe section of the heat exchange pipe group 2 is positioned between the planes of the two wing plates 3-1-1 of the oblique beam 3-1.
And step 3, installing a heat exchange tube clamping sleeve 5.
According to the invention, in step 3, as shown in fig. 2, the heat exchange tube cutting sleeve comprises a fixing plate 5-1, a toothed plate 5-2 and a partition plate 5-3, wherein the toothed plate 5-2 is provided with tooth sockets, the number of the tooth sockets is equal to that of each layer of heat exchange tubes 2-1, and the tooth sockets are preferably U-shaped tooth sockets.
According to the invention, in the step 3, the partition plate 5-3 is arranged between the two layers of heat exchange tubes 2-1, the two layers of heat exchange tubes 2-1 are clamped and fixed by the castellated plates 5-2, the heat exchange tubes 2-1 are positioned in the tooth grooves of the castellated plates 5-2, and preferably, the central line of the circular arc of the U-shaped tooth groove is superposed with the central line of the inner heat exchange tube 2-1.
According to the invention, in step 3, both ends of the toothed plate 5-2 are connected, preferably bolted,
according to the invention, the fixing plate 5-1 is connected with the oblique beam 3-1, preferably welded with the two wing plates 3-1-1 of the oblique beam 3-1, so as to complete the installation of the heat exchange tube cutting sleeve 5 and further complete the installation of the heat exchange tube group and the trapezoidal frame.
According to the invention, in the step 3, the welding position C of the oblique beam 3-1 and the fixing plate 5-1 is not more than 10mm, three or more groups of parallel cutting sleeves 5 are arranged on the heat exchange tube group 2, preferably 7 groups of cutting sleeves 5 are arranged, the cutting sleeves 5 are vertical to the oblique beam 3-1, the cutting sleeves 5 are arranged on the oblique tube section of the heat exchange tube group 2, and the distances between the cutting sleeves 5 of the straight tube sections of the heat exchange tube 2 are equal.
According to the invention, after the heat exchange tube set 2 and the frame 3 are installed, the whole structure is turned over, so that the vertical beam 3-2 is perpendicular to the reference platform.
The installation method of the heat exchange tube group and the trapezoid frame can realize accurate installation, the adopted adjusting device can stably support the heat exchange tube group, and the height of the heat exchange tube group can be adjusted and the heat exchange tube group can freely move in all directions on the horizontal reference platform, so that the position of the heat exchange tube group can be moved according to actual needs even in a narrow space which is difficult to operate when the heat exchange tube group is assembled and welded and installed with the trapezoid steel structure frame, the alignment and the positioning are accurate, the installation is convenient, the method avoids collision and deformation caused by crown block operation, resources such as a crown block, a special sling and the like are saved, and the heat exchange tube group can be moved through manpower.
The installation method provided by the invention is composed of a simple mechanical structure, does not need the assistance of a hydraulic and electric control system, has the advantages of ingenious design, simple structure, low manufacturing cost, easy operation and strong practicability, can realize the accurate adjustment of the position of a larger component in a narrow space through the simple mechanical structure, greatly reduces the installation difficulty of the heat exchange tube group and improves the installation precision.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on operational states of the present invention, and are only used for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention has been described in detail with reference to the preferred embodiments and illustrative examples. It should be noted, however, that these specific embodiments are only illustrative of the present invention and do not limit the scope of the present invention in any way. Various modifications, equivalent substitutions and alterations can be made to the technical content and embodiments of the present invention without departing from the spirit and scope of the present invention, and these are within the scope of the present invention. The scope of the invention is defined by the appended claims.
Claims (6)
1. A method of installing a PCS heat exchanger heat exchange tube bank to a ladder frame, the method comprising the steps of:
step 1, assembling and welding a heat exchange tube set (2);
step 2, adjusting the spatial position of the heat exchange tube set (2);
step 3, installing a heat exchange tube clamping sleeve (5);
in step 1, the assembly welding of the heat exchange tube set comprises the following steps:
step 1', installing an adjusting device (1);
step 2', the heat exchange tube set (2) is placed on the adjusting device (1), and the position is adjusted to complete assembly welding;
in the step 1 ', a first adjusting trolley (1-1) and a second adjusting trolley (1-1') are respectively arranged outside and inside the trapezoid frame and are connected by a connecting beam (1-2);
in the step 2 ', a first pipe box (2-2) and a second pipe box (2-2 ') of the heat exchange pipe set are respectively arranged on a first adjusting trolley (1-1) and a second adjusting trolley (1-1 '), the height and the horizontal position of the heat exchange pipe set (2) are adjusted, and the assembly welding of the heat exchange pipe set (2) is completed; the height and the position of the C-shaped heat exchange tube groups on the left side and the right side are adjusted, the first tube box (2-2) and the second tube box (2-2 ') of the C-shaped heat exchange tube groups on the left side and the right side are adjusted to be the same in height by moving the adjusting device (1) back and forth and adjusting the spiral screw rod body on the adjusting trolley, and the first adjusting trolley (1-1) and the second adjusting trolley (1-1 ') are moved by the adjusting wheels (1-1-7), so that a certain distance is reserved between the first tube box (2-2) and the second tube box (2-2 ') and the frame (3);
in the step 2, after the heat exchange tube set (2) is assembled and welded, the heat exchange tube set (2) is moved by using the adjusting device (1);
the heights of the first channel box (2-2) and the second channel box (2-2') of the heat exchange tube set are adjusted, so that the inclination angle of the straight tube section of the heat exchange tube (2-1) of the heat exchange tube set (2) is the same as that of the inclined beam (3-1).
2. A method according to claim 1, characterized in that in step 2, the oblique beam (3-1) is H-shaped steel with two wings (3-1-1), and the plane of the straight pipe section of the heat exchange tube set (2) is located between the planes of the two wings (3-1-1) of the oblique beam (3-1).
3. The method according to claim 1, wherein in the step 3, the heat exchange tube cutting sleeve (5) comprises a fixing plate (5-1), a toothed plate (5-2) and a partition plate (5-3), wherein the toothed plate (5-2) is provided with toothed grooves, the number of the toothed grooves is equal to that of each layer of heat exchange tubes (2-1), and the toothed grooves are U-shaped toothed grooves.
4. The method as claimed in claim 3, wherein in the step 3, the partition plate (5-3) is placed between two layers of heat exchange tubes (2-1), the two layers of heat exchange tubes (2-1) are clamped and fixed by the castellated plates (5-2), the heat exchange tubes (2-1) are positioned in the tooth grooves of the castellated plates (5-2), and the central line of the circular arc of the U-shaped tooth groove is coincident with the central line of the heat exchange tubes (2-1).
5. A method according to claim 3, characterized in that in step 3, both ends of the castellated plate (5-2) are bolted to a fixed plate (5-1),
and welding the fixed plate (5-1) and the two wing plates (3-1-1) of the oblique beam (3-1) to finish the installation of the heat exchange tube set and the trapezoid frame.
6. The method according to claim 3, characterized in that in step 3, the welding position (C) of the oblique beam (3-1) and the fixing plate (5-1) is not more than 10mm, three or more parallel heat exchange tube cutting sleeves (5) are arranged on the heat exchange tube set (2), the heat exchange tube cutting sleeves (5) are vertical to the oblique beam (3-1), the oblique tube sections of the heat exchange tube set (2) are provided with the heat exchange tube cutting sleeves (5), and the distances between the cutting sleeves of the straight tube sections of the heat exchange tube (2-1) are equal.
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| CN201811641215.6A CN109773377B (en) | 2018-12-29 | 2018-12-29 | Installation method of heat exchange tube set and trapezoidal frame of PCS heat exchanger equipment |
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| CN201811641215.6A CN109773377B (en) | 2018-12-29 | 2018-12-29 | Installation method of heat exchange tube set and trapezoidal frame of PCS heat exchanger equipment |
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| CN109773377B true CN109773377B (en) | 2021-05-18 |
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