A plate limiting frame for plate heat exchanger and a method of using the same

Abstract

The application provides a plate limiting frame for a plate heat exchanger, and relates to the technical field of plate heat exchangers, which comprises three parts, namely an end plate group, a positioning assembly and a bolt rod group. The end plate group comprises front and rear end plates, and a guide rod assembly is arranged between the front and rear end plates. The guide rod assembly comprises upper and lower guide rods, and the upper and lower guide rods are connected through a support column. The positioning assembly comprises an insertion piece and a positioning piece fixed to the surface of the guide rod assembly. The area formed between the front and rear end plates is used for loading the plate. The technical key points are as follows: compared with the traditional plate heat exchanger frame body, the improved plate limiting frame in the scheme is convenient for disassembling and replacing the plate during replacement or maintenance. Since the dovetail groove and the corresponding insertion piece and positioning piece are designed, the plate can be conveniently replaced while being limited, and the length of the entire frame body can be shortened to cope with the traditional large plate heat exchanger.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of plate heat exchangers, and particularly relates to a plate limiting frame for a plate heat exchanger and a use method thereof BACKGROUND

[0002] At present, a plate heat exchanger is a kind of high-efficiency heat exchanger formed by a series of metal sheets with a certain corrugated shape; thin rectangular channels are formed between various plates, heat exchange is carried out through the plates, the plate heat exchanger is an ideal device for liquid-liquid and liquid-vapor heat exchange, and has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small occupied area, wide application, long service life and the like; under the condition of the same pressure loss, the heat transfer coefficient of the plate heat exchanger is 3-5 times higher than that of a tube heat exchanger, the occupied area is one-third of that of the tube heat exchanger, and the heat recovery rate can be as high as 90% or more; among them, the types of the plate heat exchanger mainly include frame type (detachable type) and brazing type, and the plate types mainly include three types of herringbone corrugated plates, horizontal flat corrugated plates and nodule plates

[0003] The basic principle of the existing plate heat exchanger is as follows: the detachable plate heat exchanger is formed by a plurality of punched corrugated thin plates which are overlapped and compressed at a certain interval, the periphery is sealed by gaskets, and the frame and compression screw are used for compression and compression; the four corner holes of the plate and the gasket form fluid distribution pipes and collection pipes, and reasonably separate the cold and hot fluids so that they flow in the flow channels on both sides of each plate, and heat exchange is carried out through the plate; a plurality of bolts are arranged between the front and rear end plates, and nuts are arranged, which are used for adjusting and fixing the distance between the front and rear end plates.

[0004] However, the present inventors found at least the following technical problems in the process of implementing the technical solutions in the embodiments of the present application:

[0005] Generally, the plate heat exchanger will reserve a certain space in the length direction during the structural design to meet the installation and maintenance requirements; during the operation, the corresponding bolts only need to be loosened or disassembled, and then the rear end plate is pushed to the tail support, and the plate can move between the front and rear end plates; if the plate needs to be removed, the corresponding roller can be removed; however, during the operation, the number of nuts on the corresponding screw is large, and it is time-consuming and laborious to adjust one by one, and it is not convenient; in addition, the traditional plate heat exchanger has a large size, and due to the design problems of various structures and in order to meet the disassembly and assembly of the plate, the plate heat exchanger cannot be further reduced in size. SUMMARY

[0006] In order to overcome the existing deficiencies, the embodiments of the present application provide a plate limiting frame for a plate heat exchanger and a use method thereof, which improves the limiting frame from the reserved space in the traditional plate heat exchanger, makes the limiting frame convenient to manufacture, reduces the length, and is also very convenient when disassembling and assembling the plate.

[0007] The technical scheme adopted by the embodiment of the application to solve the technical problem is:

[0008] A plate limiting frame for a plate heat exchanger, comprising three parts, specifically an end plate group, a positioning assembly and a bolt rod group;

[0009] The end plate group comprises a front end plate and a rear end plate, and a guide rod assembly is arranged between the front and rear end plates, the guide rod assembly comprises an upper guide rod and a lower guide rod, and the upper and lower guide rods are connected by a support column; the positioning assembly comprises an insert piece and a positioning piece fixed to the surface of the guide rod assembly, a region formed between the front and rear end plates is used for loading a plate piece, and dovetail grooves are formed at the upper and lower ends of the plate piece for inserting the insert piece and the positioning piece; the bolt rod group is used for connecting the front and rear end plates, and the bolt rod group comprises a plurality of bolt pieces and a main bolt, and an adjusting assembly is arranged on the surface of the bolt rod group for connecting the bolt rod group and the rear end plate.

[0010] In the improved plate limiting frame, the plate piece can be conveniently disassembled and replaced during replacement or maintenance, and the dovetail groove and the corresponding insert piece and positioning piece are designed to facilitate replacement while limiting the plate piece.

[0011] In a possible implementation manner, the upper guide rod and the lower guide rod are always distributed in parallel, the insert piece is fixed to the bottom side of the upper guide rod, and the cross section of the insert piece is in the shape of an inverted "V".

[0012] The positioning piece is fixed to the top side of the lower guide rod, and the width of the positioning piece is consistent with the width of the entrance end of the dovetail groove.

[0013] A notch is formed at the end of the surface of the insert piece and the positioning piece close to the support column, for separating the plate piece from the entire limiting frame.

[0014] In a possible implementation manner, the shape and size of the bolt piece and the main bolt are consistent, and the bolt rod group is distributed on the outer peripheral surface of the end plate group.

[0015] In a possible implementation manner, the adjusting assembly comprises a plurality of rings fitted on the outer surface of the bolt rod group, each of the rings is connected by a connecting rod, and a pulley piece that can linearly slide on the surface of the upper guide rod is arranged on the top of the connecting rod.

[0016] The adjusting assembly is designed on one side of the rear end plate, and the positioning of the rear end plate is completed by using a toothed plate and a toothed groove, so that when the rear end plate is linearly adjusted, only the toothed plate needs to be adjusted instead of disassembling each nut on the traditional bolt, which is extremely convenient to use, and the entire adjusting assembly can also be disassembled from the rear end plate, which is convenient for subsequent replacement.

[0017] The side of the connecting rod surface towards the rear end plate is welded with a plug rod, the plug rod penetrates the rear end plate, and a positioning screw rod is assembled on the surface of the rear end plate, and the end of the positioning screw rod inserted into the rear end plate abuts against the outer surface of the plug rod.

[0018] The outer side of the main bolt is provided with a plurality of linearly distributed tooth grooves, a tooth plate is rotatably assembled on the surface of the ring surrounding the outer surface of the main bolt, and the tooth plate is engaged with the tooth grooves.

[0019] A plate limiting frame for a plate heat exchanger, and a method for using the plate limiting frame is provided.

[0020] S1, sequentially assembling the adjusting assembly and the rear end plate on the outer surface of the bolt rod group;

[0021] S2, then penetrating each plug rod in the adjusting assembly through the rear end plate, and screwing a positioning screw rod on the outer surface of the rear end plate to position the position of each plug rod in the rear end plate;

[0022] S3, when the spacing between the front and rear end plates needs to be adjusted, the entire rear end plate can be linearly adjusted by hand, the tooth plate is turned over to be separated from the corresponding main bolt, until the appropriate position is adjusted, the entire tooth plate is loosened, and the tooth plate is engaged with the tooth grooves;

[0023] S4, when the corresponding plate needs to be removed, the step S3 is repeated, and then the corresponding plate is discharged from the pre-designed gap of the plug and the positioning piece, so that the plate is disassembled.

[0024] The beneficial effects of the present application are:

[0025] Firstly, compared with the traditional plate heat exchanger frame body, the improved plate limiting frame in the present application is convenient to disassemble and replace the plate during replacement or maintenance, since the dovetail groove and the corresponding plug and positioning piece are designed, the plate is limited and replaced conveniently, and the length of the entire frame body can be shortened to cope with the traditional large plate heat exchanger.

[0026] Secondly, in the present application, the adjusting assembly is designed on one side of the rear end plate, the tooth plate and the tooth groove are used to position the rear end plate, and when the rear end plate is linearly adjusted, only the separately designed tooth plate needs to be adjusted without disassembling each nut on the traditional bolt, which is very convenient to use, and the entire adjusting assembly can also be disassembled with the rear end plate for subsequent replacement. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0028] Figure 2 It is a partial structure side view of the present application;

[0029] Figure 3 For the invention Figure 1 Enlarged view of partial structure A;

[0030] Figure 4 For the invention Figure 1 Enlarged view of partial structure B;

[0031] Figure 5 For the invention Figure 1 Enlarged view of partial structure C.

[0032] BRIEF DESCRIPTION OF DRAWINGS: 1, front end plate; 2, rear end plate; 3, upper guide rod; 4, lower guide rod; 5, bolt; 6, main bolt; 7, plate; 8, dovetail groove; 9, insertion rod; 10, insertion piece; 11, positioning piece; 12, ring; 13, connecting rod; 14, pulley; 15, tooth groove; 16, tooth plate; 17, notch; 18, strut; 19, positioning screw. DETAILED DESCRIPTION

[0033] The plate limiting frame for plate heat exchanger and the use method thereof provided by the embodiments of the present application make improvements on the limiting frame from the reserved space in the traditional plate heat exchanger, so that the limiting frame is convenient to manufacture, the length is reduced, and the plate is extremely convenient to disassemble and assemble.

[0034] The technical solutions in the embodiments of the present application are to solve the problems in the background art, and the general idea is as follows:

[0035] Embodiment 1

[0036] This embodiment specifically introduces the specific structure of a plate limiting frame for plate heat exchanger, as shown in Figure 1 , Figure 3 and Figure 4 , which comprises an end plate group and a positioning assembly;

[0037] The end plate group comprises a front end plate 1 and a rear end plate 2, and a guide rod assembly is arranged between the front end plate and the rear end plate, the guide rod assembly comprises an upper guide rod 3 and a lower guide rod 4, and the upper guide rod and the lower guide rod are connected through a strut 18, as shown in Figure 1 The upper guide rod 3, the strut 18 and the lower guide rod 4 are combined with each other to form a “” shape structure.

[0038] The positioning assembly comprises an insertion piece 10 and a positioning piece 11 fixed to the surface of the guide rod assembly, and the area formed between the front end plate and the rear end plate is used for loading the plate 7, and the upper end and the lower end of the plate 7 are both provided with a dovetail groove 8 for inserting the insertion piece 10 and the positioning piece 11, and since the upper end and the lower end of the plate 7 are both provided with the dovetail groove 8, the plate 7 can be used on both sides.

[0039] In some examples, the upper guide rod 3 and the lower guide rod 4 are always arranged in parallel. The insert 10 is fixed to the bottom side of the upper guide rod 3, and the cross section of the insert 10 is inverted "V" shaped. The insert 10 can be inserted into the corresponding dovetail groove 8, which can ensure the stability of the plate 7.

[0040] In some examples, the positioning piece 11 is fixed to the top side of the lower guide rod 4, and the width of the positioning piece 11 matches the width of the inlet end of the dovetail groove 8;

[0041] In specific application scenarios, in order to improve the assembly, disassembly, maintenance and cleaning conditions of plate heat exchangers, the heat exchanger structure can be improved by changing the assembly and disassembly status of plate 7 and rear plate 2 and reducing the reserved space.

[0042] In some examples, notches 17 are provided on the surfaces of insert 10 and positioning plate 11 near the end of the support column 18 to allow plate 7 to be separated from the entire limiting frame. The notches 17 are designed so that plate 7 and rear end plate 2 can be detached from the notches 17.

[0043] By adopting the above technical solution:

[0044] Compared to traditional plate heat exchanger frames, the improved plate limiting frame in this design facilitates the disassembly and replacement of the plates 7 during replacement or maintenance. Due to the design of dovetail grooves and corresponding inserts 10 and positioning plates 11, the plate 7 is not only limited but also easily replaced. At the same time, the length of the entire frame can be shortened to accommodate traditional large plate heat exchangers.

[0045] Example 2:

[0046] Based on Example 1, this example specifically describes the structure of the bolt rod assembly and its adjusting components, such as... Figure 2 and Figure 5 As shown, the bolt rod assembly is used to connect the front and rear end plates. The bolt rod assembly includes several bolts 5 and main bolts 6. An adjustment component is mounted on the surface of the bolt rod assembly for connecting the bolt rod assembly and the rear end plate 2. The adjustment component is extremely simple to use and convenient to operate.

[0047] In some examples, bolt 5 and main bolt 6 have the same shape and size, and the bolt shank groups are distributed on the outer circumferential surface of the end plate group, such as... Figure 1 As can be seen from the diagram, bolt 5 and main bolt 6 are always distributed in parallel.

[0048] In some examples, the adjustment assembly includes several rings 12 fitted onto the outer surface of the bolt rod assembly. The rings 12 are connected by connecting rods 13, and a pulley 14 is provided on the top of the connecting rod 13 that can slide linearly on the surface of the upper guide rod 3. The pulley 14 can be rolled on the upper guide rod 3 for adjustment.

[0049] The connecting rod 13 is welded on one side of the rear end plate 2, and the plug rod 9 penetrates the rear end plate 2 and is equipped with a positioning screw rod 19 on the surface of the rear end plate 2. The end of the positioning screw rod 19 inserted into the rear end plate 2 abuts against the outer surface of the plug rod 9. The positioning screw rod 19 at this position can be removed from the rear end plate 2, so that the plug rod 9 is pulled out of the rear end plate 2, and then the separation operation of the adjusting assembly and the rear end plate 2 is completed.

[0050] The outer side of the main bolt 6 is provided with a plurality of linearly distributed tooth grooves 15, and the tooth plate 16 is rotatably arranged on the surface of the ring 12 sleeved on the outer surface of the main bolt 6, and the tooth plate 16 is engaged with the tooth grooves 15.

[0051] In a specific application scenario, the tooth plate 16 and the ring 12 are connected through a rotating shaft provided with a torsional spring. Under normal conditions, the elastic restoring force of the torsional spring can make the tooth plate 16 mesh with the tooth grooves 15, thereby ensuring the stability of the position of the entire rear end plate 2.

[0052] By adopting the above technical scheme:

[0053] The adjusting assembly is designed on one side of the rear end plate 2, and the positioning of the rear end plate 2 is completed by the tooth plate 16 and the tooth grooves 15. When linearly adjusting the rear end plate 2, it is not necessary to disassemble each nut on the traditional bolt, but only to adjust the separately designed tooth plate 16, which is extremely convenient to use. At the same time, the entire adjusting assembly can be separated from the rear end plate 2, which is convenient for subsequent replacement.

[0054] Embodiment 3:

[0055] Based on embodiment 1, this embodiment specifically introduces a plate limiting frame for a plate heat exchanger. The use method of the plate limiting frame is as follows:

[0056] S1, the adjusting assembly and the rear end plate 2 are sequentially sleeved on the outer surface of the bolt rod group;

[0057] S2, each plug rod 9 in the adjusting assembly penetrates the rear end plate 2, and the positioning screw rod 19 is screwed on the outer surface of the rear end plate 2 to position each plug rod 9 in the rear end plate 2;

[0058] S3, when the distance between the front and rear end plates needs to be adjusted, the entire rear end plate 2 is held for linear adjustment, and the tooth plate 16 is turned over to separate it from the corresponding main bolt 6, until the appropriate position is adjusted, the entire tooth plate 16 is loosened, and the tooth plate 16 is engaged with the tooth grooves 15.

[0059] S4, when the corresponding plate 7 needs to be removed, the steps of S3 are repeated, and then the corresponding plate 7 is discharged from the pre-designed gap 17 of the plug 10 and the positioning piece 11, thereby completing the disassembly of the plate 7.

[0060] It should be noted that the above-mentioned embodiments are merely given as an example for clearness and concision and that no limitations to the disclosed application are implied. Based on the above description, those skilled in the art can conceive of many modifications or variations of the embodiments. All of these modifications or variations should be considered as being within the scope of the application.

Claims

1. A plate limiting bracket for a plate heat exchanger, characterized in that, include: The end plate assembly includes a front end plate (1) and a rear end plate (2), and a guide rod assembly is provided between the front and rear end plates. The guide rod assembly includes an upper guide rod (3) and a lower guide rod (4), and the upper and lower guide rods are connected by a support column (18). The positioning assembly includes a insert (10) and a positioning piece (11) fixed to the surface of the guide rod assembly. A plate (7) is inserted into the area formed between the front and rear end plates, and dovetail grooves (8) are provided at both the upper and lower ends of the plate (7) for the insert (10) and positioning piece (11) to be inserted. A bolt rod assembly is used to connect the front and rear end plates. The bolt rod assembly includes several bolts (5) and a main bolt (6). An adjustment assembly is mounted on the surface of the bolt rod assembly for connecting the bolt rod assembly and the rear end plate (2). The insert (10) and the positioning piece (11) are both provided with a notch (17) at the end near the support column (18) so that the plate (7) can be separated from the entire limiting frame; The adjustment assembly includes several rings (12) fitted on the outer surface of the bolt rod assembly. Each ring (12) is connected by a connecting rod (13), and a pulley (14) that can slide linearly on the surface of the upper guide rod (3) is provided on the top of the connecting rod (13). The connecting rod (13) has a plug rod (9) welded on the side facing the rear end plate (2). The plug rod (9) passes through the rear end plate (2) and a positioning screw (19) is installed on the surface of the rear end plate (2). One end of the positioning screw (19) inserted into the rear end plate (2) abuts against the outer surface of the plug rod (9). The outer side of the main bolt (6) has a number of linearly distributed toothed grooves (15), and a toothed plate (16) is rotatably mounted on the surface of the ring (12) fitted on the outer surface of the main bolt (6), and the toothed plate (16) meshes with the toothed grooves (15).

2. The plate limiting frame for a plate heat exchanger as described in claim 1, characterized in that: The upper guide rod (3) and the lower guide rod (4) are always arranged in parallel. The insert (10) is fixed to the bottom side of the upper guide rod (3), and the cross section of the insert (10) is inverted "V" shape.

3. A plate limiting frame for a plate heat exchanger as described in claim 2, characterized in that: The positioning piece (11) is fixed to the top side of the lower guide rod (4), and the width of the positioning piece (11) matches the width of the entrance end of the dovetail groove (8).

4. A plate limiting frame for a plate heat exchanger as described in claim 1, characterized in that: The bolts (5) and main bolts (6) are identical in shape and size, and the bolt shanks are distributed on the outer circumferential surface of the end plate group.

5. The method of using the plate limiting bracket for a plate heat exchanger as described in any one of claims 1-4, characterized in that: The method of using this plate limiting bracket is as follows: S1. Install the adjusting component and the rear end plate (2) onto the outer surface of the bolt rod assembly in sequence; S2. Then, insert each of the rods (9) in the adjustment assembly through the rear end plate (2) and screw the positioning screw (19) on the outer surface of the rear end plate (2) to position each of the rods (9) in the rear end plate (2). S3. When it is necessary to adjust the distance between the front and rear end plates, the entire rear end plate (2) can be held by hand for linear adjustment, and the toothed plate (16) can be flipped to separate it from the corresponding main bolt (6) until it is adjusted to a suitable position. Then, the entire toothed plate (16) can be released so that the toothed plate (16) can mesh with the tooth groove (15). S4. When it is necessary to remove the corresponding plate (7), repeat step S3, and then make the corresponding plate (7) exit from the preset notch (17) on the insert (10) and positioning plate (11), thereby completing the removal of the plate (7).

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