BRPI1007921B1 - PLATE HEAT EXCHANGER - Google Patents

Abstract

plate heat exchanger the invention relates to a plate heat exchanger (1) including a first and a second end plate (2, 3) and a core of heat exchanger plates (4} placed between the first and the second end plates (2,3) in which a plurality of threaded clamping screws (5 a, sb, if) extend between the first and second end plates (2, 3) and are placed with the help of nuts (6) or similar, to hold these plates at a desired distance from each other, in order to hold the core of the heat exchanger plates together, in which at least one guide element (7, 7 a, 7b) to guide the first end plate (2) and the heat exchanger plates (4) relatively, the second end plate (3) is positioned so that it can be released on at least one of the threaded clamping screws (5 a, sb), whose guide element (7a) extends through an opening (8) in the first end plate and (2), where at least one guide element (7a, 7b) is provided with a hollow hole (9) to receive at least one of the threaded clamping screws (5a, sb) and an external geometry (1 o) corresponding to the cut (11) of the heat exchanger plates (4) and the first end plate (2).

Description

“PLATE HEAT EXCHANGER”

Area of the Invention [0001] The present invention generally relates to plate heat exchangers allowing heat transfer between two fluids at different temperatures for various purposes. Specifically, the invention relates to a plate heat exchanger including a first end plate, a second end plate and a heat exchanger plate conditioner placed between the frame plate and the pressure plate. A plurality of hollow fastening screws extend between the first end plate and the second end plate and are placed to secure, with the help of nuts or the like, these plates, at a desired distance between each other, in order to secure the heat exchanger plate conditioner together.

Background of the Invention [0002] Plate heat exchangers are usually provided with a frame plate, a pressure plate, also called end plates, and a heat exchanger plate conditioner placed adjacent to each other and placed between the plate. frame and pressure plate. Gaskets are placed between the heat exchanger plates. The gaskets are accommodated in gasket grooves in the heat exchanger plate which are formed during the pressing of the heat exchanger plates. Plate heat exchangers additionally include inlet and outlet ports, which extend through the plate conditioner. To handle two or more media in the plate heat exchanger. A plurality of threaded clamping screws extend between the frame plate and the pressure plate and are placed to secure these plates with the help of nuts or the like, at a desired distance from one to the other in order to hold the conditioner heat exchanger plates together and to ensure that the heat exchanger does not leak.

Petition 870190089126, of 09/09/2019, p. 11/46 / 12 [0003] Heat exchanger plates are normally made by pressing the shape of a sheet of metal and are placed in the plate conditioner in such a way as to form intermediate spaces of the first plate, which communicate with each other. the first entrance door and the first exit door, and the second intermediate plate spaces communicate with the second entrance door and the second exit door. The first and second intermediate plate spaces are placed alternately in the plate conditioner.

[0004] The heat exchanger plate design for plate heat exchangers aims to use as much of the heat transfer or heat exchange area as possible for the heat exchange between two or more media, but it also needs to take into account It tells how the gaskets can be applied to the heat exchanger plate to be securely fixed and to fulfill its sealing functionality. The location of the threaded clamping screws is preferably selected to achieve a plate heat exchanger not exposed to too much tension.

[0005] SE-C-171499 shows a plate heat exchanger with a frame plate, a pressure plate, a conditioner for heat exchanger plates, two connecting bars as well as a special support device. The frame plate and the support device are both provided with feet. Through the influence of yokes, among other things, pressure is created on the pressure plate and the plate conditioner is kept together. The construction shows the disadvantage that both the support device and the pressure plate in need are created, in the form of a very strong construction. In addition, the auxiliary transport bar for supporting plates in connection with the assembly and disassembly of the heat exchangers is an unnecessary complication.

[0006] EP-B1-1 027 571 shows another plate heat exchanger, where clamping screws have been integrated into the transport bars and the

Petition 870190089126, of 09/09/2019, p. 12/46 / 12 guide bar, and creates a guide element for the pressure plate and the heat exchanger plates. The location of the clamping screws is therefore more optimal to withstand the forces defined on the plate heat exchanger during operation. The guide element is surrounded by a protective sleeve extending from the frame plate to the pressure plate and protecting the threads of the guide element from the socket with the heat exchanger plates. The guide element is also placed to be connected to a support device located at a substantial distance from the pressure plate.

[0007] The disadvantages with the above solutions are that the stresses and forces are too great if the solutions are applied over larger plate heat exchangers.

Discovery of the Invention [0008] The purpose of the present invention is to create a construction which is given an optimal load distribution over the plate heat exchanger being even cheaper and less complicated to manufacture than one described above.

[0009] The advantages are achieved by using at least one guide element to guide the first end plate and the heat exchanger plates relative to the second end plate, and where the guide element is placed as being possible to be released on at least one of the threaded clamping screws. The guide element extends through an opening and the at least one guide element is provided with a hollow hole to receive at least one of the threaded clamping screws and an external geometry corresponding to a cut of the heat exchanger plates and the first plate end point.

[00010] According to another aspect of the invention the plate heat exchanger is provided with two guide elements, a first guide element placed on an upper portion of the plate heat exchanger and a second guide element placed on a lower portion of the exchanger plate heat.

Petition 870190089126, of 09/09/2019, p. 13/46 / 12

The first and second guide elements can have an identical cross section profile.

[00011] In accordance with yet another aspect of the invention, the second guide element is additionally provided with a guide rail to receive the second mobile element in a mobile manner.

[00012] In accordance with yet another aspect of the present invention, the guide rail for mobilely receiving the second guide element is partially or completely supported by the floor.

[00013] According to yet another aspect of the present invention the at least one guide element includes two separate parts, and the at least one guide element and the guide rail is made of an extruded material. [00014] In accordance with a further aspect of the present invention a support device is placed so that it can be released a considerable distance from the first end plate and the end of the lower and upper clamping screws, and extending between the top and bottom fastening screws.

[00015] According to yet another aspect of the present invention the at least one guide element is movable along the clamping screws and where a part of the guide element can be removed as the heat exchanger plates are pressed together by the first end plate to form the operational plate heat exchanger, where after removing a part of the guide element it can be placed on a free portion of the clamping screw outside the plate heat exchanger.

[00016] In accordance with yet another aspect of the present invention the objective is achieved by a plate heat exchanger where the heat exchanger plates rest on at least one guide element and where the first end plate rests on a guide rail, on whose guide rail the at least one guide element is received in a mobile way.

[00017] Additional aspects of the invention are defined in the

Petition 870190089126, of 09/09/2019, p. 14/46 / 12 dependent claims.

Brief Description of the Drawings [00018] The present invention is now explained more closely by means of a description of various configurations and with reference to the accompanying drawings.

Fig. 1 shows a perspective view of a plate heat exchanger according to a configuration of the invention;

Fig. 2 shows a side view of a plate heat exchanger according to a configuration of the invention;

Fig. 3 shows a partial view of a plate heat exchanger according to a configuration of the invention;

Fig. 4 shows a cross-sectional view A-A of a plate heat exchanger according to a configuration of the invention;

Fig. 5 uncovers a first partial partial view B of the plate heat exchanger of Fig. 4 according to a configuration of the present invention;

Fig. 6 uncovers a second partial detailed view C of the plate heat exchanger of Fig. 4 according to a configuration of the present invention;

Figs. 7a-b show different views of a guide element according to the invention; and

Figs. 8a-b show different views of a guide rail according to the invention.

Detailed Description of Configurations [00019] Heat exchangers are used to transfer heat between two fluids separated by a solid body. Heat exchangers can be of various types, the most common of which are spiral heat exchangers, tubular heat exchangers and plate heat exchangers. Plate heat exchangers are used to transfer heat between hot and cold fluid that are flowing in

Petition 870190089126, of 09/09/2019, p. 15/46 / 12 alternating flow passages formed between a set of heat exchanger plates.

[00020] Figs. 1-2 discover a schematic view of a plate heat exchanger 1, including a number of compression molded heat exchanger plates 4, whose heat exchanger plates 4 are provided in parallel to one another and successively in such a way that they form a plate conditioner. The plate conditioner is provided between a first end plate 2, also called a pressure plate, and a second end plate 3, also called a frame plate. Between the heat exchanger plates 4, the first plate spaces and the second plate spaces are formed. The end plates 2 and 3 are pressed against the plate conditioner and against each other, by tightening the screws or connecting bars 5 ac that extend through plates 2 and 3, and whose clamping screws 5 ac are kept in the place by orcas 6, 20.

[00021] The plate heat exchanger 1 includes a first inlet and a first outlet port for a first medium, and a second inlet and second outlet port for a second medium. The entry and exit ports extend through the second end plate 3 and the plate conditioner. It is also possible that the inlet and outlet ports are placed on both sides of the plate heat exchanger 1, ie on both plates 2 and 3. Both means can be taken in the same directions or in opposite directions with respect to one to the other. [00022] The heat exchanger plates 4 in the configuration shown are placed in such a way in the plate conditioner in order to form the first intermediate spaces which communicate with the first entry post and with the first exit door, and the second intermediate plate spaces, which communicate with the second entrance door and the second exit door. The first and second spaces

Petition 870190089126, of 09/09/2019, p. 16/46 / 12 plate intermediates are placed alternately in the plate conditioner. The separation of the intermediate plate spaces can be by gaskets that extend through gasket grooves formed during pressing of the shape of the heat exchanger plates. Gaskets are fair, usually made of rubber or polymeric material. The heat exchanger plates 4 are provided with a corrugated matrix to improve the heat exchange between the two fluids.

[00023] To guide the heat exchanger plates 4, to protect the threaded clamping screws 5a, 5b from the wear of the heat exchanger plates 4, to simplify the construction, and to make the construction cheaper, guiding elements 7 have been provided, 7a, 7b at the upper and lower ends of the clamping screws 5a, 5b.

[00024] Compared with the state of the art heat exchanger plates, the upper and lower ends of the clamping screws 5 a, 5b replace the traditional transport and the guide bars, which otherwise serve to enable the opening / closing of the plate heat exchanger, enabling the first end plate 2 and heat exchanger plates 4 to move along the transport bar and guide bar while the plate heat exchanger is standing. Providing the upper and lower guide elements 7 a and 7b which, placed in the clamping screws 5 a, 5b, respectively, and where the guide elements 7 a, 7b have a geometry of external cross section (See Figs. 7 a and b) similar to the plates heat exchangers of the traditional transport bar 4, having a cutting profile 11 corresponding to a lower portion of the guide element 7 a and 7b having an outer geometry 10, can be guided along the upper guide element 7 a. The clamping screws 5a, 5b, respectively, and where the guide elements, 7a and 7b, having an outer geometry 10, can be guided along the upper guide element 7a. The clamping screws 5a, 5b are received in an open hole or hole in the guide element 7a, 7b, which, through the

Petition 870190089126, of 09/09/2019, p. 17/46 / 12 orifice 9 extends along the entire longitudinal length of the guide element 7a, 7b. The guide element 7a, 7b is made of a material that can be extruded to make manufacturing cheaper and to make construction lighter. The material that can be extruded can be plastic, aluminum or any other suitable construction material.

[00025] Additional clamping screws 5c are usually present in the second end plate 2, and are placed in notches or recesses at the edges of the second end plate 3 and the first end plate 2.

[00026] Since the guide element 7 a and 7b is made of a material that can be extruded, it cannot withstand the same load as in a corresponding metal construction.

[00027] Therefore, the load of the heat exchanger plate 4 and the first end plate 2 will be transferred to the ground via a second or lower guide element 7b and a guide rail 12. The upper guide element 7a and the lower guide element 7b they are preferably identical to reduce manufacturing costs, but different shapes are also possible. In the configuration shown, see example Fig. 6, the lower external geometry 10 of the guide element 7b corresponds to an internal shape 16 of the guide rail 12 enabling the guide element 7b to be attached to the guide rail 12 and to be movable along the guide rail. In some configurations, the plate heat exchanger 1 is placed in the frame, which completely or partially supports the guide rail 12.

[00028] The upper guide element 7a extends through an opening 8 of the highest portion of the first end plate 2 so that the first end plate 2 can be movable relative to the upper guide element 7a. Similarly, the lower guide element 7b extends through an opening 17 of the lower portion of the first end plate 2. Both the lower guide element 7b and the upper guide element 7 only guide the end plate 2, wherein the load of the first plate

Petition 870190089126, of 09/09/2019, p. 18/46 / 12 end 2 is carried by the guide rail 12 on which the first end plate 2 rests. The heat exchanger plates 4 rest on the lower guide element 7b and are guided laterally by the upper guide element 7 a.

[00029] Each guide element 7 a, 7b includes two parts 13 a, 13b; 14 a, 14b (See Fig.3) to enable the guide of the heat exchanger plates 4 during the process of opening and closing the plate heat exchanger 1 and, therefore, enabling a part of the external guide element 14 a, 14b, to be removed when the heat exchanger plates 4 and the first end plate 2 are tightened together to form the operational plate heat exchanger 1 and apply nuts 6 over the tightened screw 5 a, 5b to hold the first end plate 2 in place and the heat exchanger plates 4 clamped together between the first end plate 2 and the second end plate 3. The length of the part of the inner guide element 13 a, 13b is preferably slightly less than the length corresponding to the total thickness of all heat exchanger plates 4 in the plate conditioner and the first end plate 2. The length of the outer guide element part 14 a, 14b is preferably slightly less than the free end remainder of the clamping screw 5 a, 5b when the part of the inner guide element 13 a, 13b has been placed on the clamping screw 5 a, 5b.

[00030] The upper guide element 7 a can be provided with wear protection to reduce wear from the heat exchanger plates 4. The wear protection can be made of a plate or rubber material or any other suitable material and it is preferably attached to the upper guide element 7 a.

[00031] The guide element 7a, 7b has an upper portion formed as an external geometry 19 having a width corresponding to the opening width of the cut 11 of the heat exchanger plates 4 and the openings 8, 17 of the

Petition 870190089126, of 09/09/2019, p. 19/46 / 12 first end plate 2. Thus, both the upper guide element 7 a and the lower guide element 7b can guide the first end plate 2 laterally, while the load of the first end plate 2 is carried by the guide rail 12. The upper guide element 7a and the lower guide element 7b will also guide the heat exchanger plates 4 laterally through the outer geometry 19 of the guide elements 7a, 7b and the lower guide element 7b will carry the load of the heat exchanger plates 4. A load is transferred directly to the guide rail 12 and additionally to the ground. The outer geometry 10 of the lower portion of the upper guide element 7a guides the heat exchanger plates 4 and serves as a tilt guard for the heat exchanger plates 4 when the plate heat exchanger 1 is open.

[00032] It is also possible that the upper guide element 7a partially or completely carries the load of the heat exchanger plates 1. An advantage of the suggested guide profile 7a, 7b is that the same component can be used both as a carrier and guide bar in the upper section of the plate heat exchanger 1, as well as carrying and guiding the bar in the lower section of the plate heat exchanger 1. The guide rail 12 serves as a weight transfer element, which also enables the lower external guide element 14b so that it can be removed when the heat exchanger plates 4 and the first end plate 2 are joined together so that nut 6 can be placed on the lower clamping screw 5b at the limit with the first end plate 2 and to maintain the plate heat exchanger 1 in closed operating mode.

[00033] As shown in Fig. 1-2 the plate heat exchanger 1 can also be provided with a support device 15 to enable the plate heat exchanger 1a to be easily opened, the support device 15 of which is provided at the free end of the clamping screws 5a, 5b and held in place by nuts 20. The support device 15 extends between

Petition 870190089126, of 09/09/2019, p. 20/46 / 12 the two clamping screws 5a, 5b, and ensures that the distance between the two clamping screws 5 a, 5b is invariant and that forces affecting the upper clamping screw 5 a are transferred to the ground. Further details on function and operation of the support device 15 will be described in connection with the description of the process of opening and closing the plate heat exchanger 1.

[00034] Now, the opening of the plate heat exchanger 1 will be described. In Fig. 1 and 2, the plate heat exchanger is in operational mode. To enable maintenance such as cleaning, repair, replacing heat exchanger plates, etc., plate heat exchanger 1 can be opened. The nuts 20 are unscrewed and the support device 15 and the external guide elements 14a, 14b are taken out of the clamping screws 5a, 5b. The nuts 6 placed on the clamping screws 5a, 5b are unscrewed and the external guide elements 14a, 14b are again placed on the free parts of the clamping screws 5a, 5b and pushed to limit against the internal guide elements 13a, 13b. The heat exchanger plate conditioner 4 and the first end plate 2 are still held together by the additional clamping screws 5c. The support device 15 is again mounted on the free parts of the upper and lower clamping screws 5a, 5b. The support device 15 is supported on the floor by the external guide element 14b and the guide rail 12. The nuts 20 are brought over the fastening screws 5a, 5b and are tightened. The additional clamping screws 5c are released from the first end plate 2 and the heat exchanger plates 4 can thereafter be moved along the guide elements 7a, 7b. Through it. An open mode of service of the plate heat exchanger 1 is attached, when the heat exchanger plates 4 are located between the end plates 2, 3 can be separated for cleaning and one or more heat exchanger plates 4 can be removed and eventually new ones can be added without the need for

Petition 870190089126, of 09/09/2019, p. 21/46 / 12 disassemble the rest of the heat exchanger plates 4. The closing or tightening of the plate heat exchanger 1 within the operational mode is done in a reverse, analogous manner.

[00035] The support device 15 is a bar, an iron plate or the like with sufficient length to make it possible to hold the upper and lower parts of the clamping screws 5 a, 5b at a correct distance in relation to each other and at the same time in open service mode for the plate heat exchanger q to be able to serve as a support device 15 for the whole plate heat exchanger 1 together with the second end plate 2. It also ensures that forces that affect the upper clamping screw 5 a are transferred to the floor via the lower clamping screw 5 a.

[00036] The guide element 7a, 7b and the guide rail 12 are preferably made of material that can be extruded such as a plastic or aluminum profile, but can also be made of any other suitable material or method of manufacture.

[00037] The invention is not limited to the configurations described above and shown in the drawings, but can be supplemented and modified in any way within the scope of the present invention as defined by the appended claims.

Claims (11)

1. Plate heat exchanger (1) including a first and a second end plate (2, 3) and a core of heat exchanger plates (4) placed between the first and second end plates (2, 3) wherein a plurality of threaded clamping screws (5a, 5b, 5c) extend between the first and second end plates (2, 3) and are placed with the help of nuts (6, 20), to hold these plates at a desired distance from each other in order to hold the core of the heat exchanger plates together, in which at least one guide element (7, 7 a, 7b) to guide the first end plate (2) and the heat exchanger plates (4) relatively, the second end plate (3) is placed so that it can be released in at least one of the threaded clamping screws (5a, 5b), whose guide element (7a) extends through an opening (8) in the first end plate (2), characterized by the fact that at least one guide element (7, 7a, 7b) comprises a lower portion and an upper portion, the upper portion being provided with a hollow hole (9) to receive at least one of the threaded clamping screws (5a, 5b) and an external geometry (10) the lower portion corresponding to the cut (11) of the heat exchanger plates (4) and the first end plate (2). 2. Plate heat exchanger (1) according to claim 1, characterized in that the plate heat exchanger (1) is provided with two guide elements (7a, 7b), a first guide element (7a) placed in an upper portion of the plate heat exchanger (1) and a second guide element (7b) placed in a lower portion of the plate heat exchanger (1). Plate heat exchanger (1) according to claim 2, characterized in that the first and second guide elements (7a, 7b) have an identical cross-section profile. 4. Plate heat exchanger (1) according to Petition 870190089126, of 09/09/2019, p. 23/46 2/3 of claim 2 or 3, characterized in that the second guide element (7b) is additionally placed to fit with a guide rail (12) to receive the second guide element (7b) movably. 5. Plate heat exchanger (1) according to claim 4, characterized in that the guide rail (12) for mobilely receiving the second guide element (7b) is completely or partially supported by the floor. 6. Plate heat exchanger (1) according to any one of the preceding claims, characterized in that at least one guide element (7a, 7b) includes two separate parts (13a, 13b, 14a, 14b). Plate heat exchanger (1) according to claim 4 or 5, characterized in that at least one guide element (7a, 7b) and the guide rail (12) is made of a material that can be extruded . Plate heat exchanger (1) according to any one of the preceding claims, characterized in that at least one guide element (7, 7a, 7b) is movable along the clamping screws (5a, 5b) and where a part (14a, 14b) of the guide element (7a, 7b) can be removed while the heat exchanger plates (4) are pressed together by the first end plate (2) to form the operational plate heat exchanger (1 ), where after removing a part (14a, 14b) of the guide elements (7a, 7b) it can be placed on a free portion of the clamping screw (5a, 5b) outside the first end plate (2). Plate heat exchanger (1) according to any one of the preceding claims, characterized in that a support device (15) is placed so that it can be released a considerable distance from the first end plate (2) at the end of the clamping screw (5a, 5b), and extending between the clamping screws (5 a, 5b). Petition 870190089126, of 09/09/2019, p. 24/46 3/3 10. Plate heat exchanger (1) according to claim 1, characterized in that the heat exchanger plates (4) rest on at least one guide element (7b) and on which the first end plate (2 ) rests on a guide rail (12), on whose guide rail (12) the at least one guide element (7b) is movably received. Plate heat exchanger (1) according to claim 10, characterized in that an upper guide element (7a) only guides the heat exchanger plates (4) and the first end plate (2).