Press block with narrow portion and photovoltaic system

Abstract

The utility model discloses a briquetting with a narrow portion and a photovoltaic system, the briquetting comprises a briquetting top plate, the front side and the rear side of the briquetting top plate are provided with a front side plate and a rear side plate which extend downwards, and the left side and the right side of the briquetting top plate are provided with a left side plate and a right side plate. A first transition plate is connected between the pressing block top plate and the left side plate, and a second transition plate is connected between the pressing block top plate and the right side plate; the front side plate and / or the rear side plate are / is provided with an upper narrow part and a lower extending part, the upper end of the upper narrow part is connected with the top plate, and the width of the upper narrow part is smaller than that of the lower extending part. The first transition plate is additionally arranged between the pressing block top plate and the left side plate, the second transition plate is additionally arranged between the pressing block top plate and the right side plate, the front side plate or the rear side plate is provided with the upper narrow part, the upper narrow part is connected with the pressing block top plate, and when the pressing block top plate is pressed downwards by external force, the first transition plate and the second transition plate deform more easily; and the left side plate and the right side plate are easier to become flat in the downward pressing process, so that the pressing block is easier to install.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic system installation technology, and in particular to a pressure block with a narrow section and a photovoltaic system. Background Technology

[0002] In a photovoltaic system, photovoltaic modules are usually installed on two adjacent purlins. If the photovoltaic modules and purlins are only connected by fastening components, the photovoltaic modules may still sway due to wind. Therefore, multiple pressure blocks are added between the photovoltaic modules and the purlins. The pressure blocks are placed between adjacent photovoltaic modules and connected to the purlins.

[0003] For example, the Chinese utility model patent with authorization announcement number CN220935099U: A medium pressure block includes a photovoltaic support beam, a photovoltaic panel fixing frame is provided on the top of the photovoltaic support beam, a medium pressure block is provided between the photovoltaic panel fixing frames, an anti-slip structure is provided on the lower surface of the top of both sides of the medium pressure block, and a limiting groove and a through hole are sequentially opened from top to bottom on the bottom of the medium pressure block. A first bolt passes through the inside of both the limiting groove and the through hole. Since the top of the first bolt is engaged with the limiting groove and the end of the second bolt is engaged with the annular groove, the locking ring can be fixed in one position, thus preventing the locking ring from loosening.

[0004] The aforementioned patent utilizes the combination of pressure blocks and bolts to achieve the fixed installation of photovoltaic panels, but it requires the use of bolts for fastening, resulting in a large number of tools to carry and cumbersome operation during installation. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a pressure block with a narrow section that is easier to install, as well as a photovoltaic system.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: First aspect, a pressure block with a narrow part includes a pressure block top plate, a front side plate and a rear side plate extending downward on the front and rear sides of the pressure block top plate, a left side plate and a right side plate on the left and right sides of the pressure block top plate, a first transition plate connecting the pressure block top plate and the left side plate, and a second transition plate connecting the pressure block top plate and the right side plate.

[0007] The front and / or rear side panels have an upper narrow portion and a lower extension portion. The upper end of the upper narrow portion is connected to the top panel, and the width of the upper narrow portion is smaller than the width of the lower extension portion.

[0008] Preferably, the first transition plate and the second transition plate are inclined downward relative to the top plate, and the left side plate and the right side plate are inclined upward relative to the first transition plate and the second transition plate, respectively; in the forward viewing direction, the lower edge of the first transition plate or the second transition plate forms an angle α with the side edge of the upper narrow portion, and the lower edge of the left side plate or the right side plate forms an angle β with the side edge of the upper narrow portion, where β > α.

[0009] Preferably, the included angle α ranges from 65°±10°; and the included angle β ranges from 73°±10°.

[0010] Preferably, the left side plate and / or the right side plate are formed with one or more protrusions facing downwards. The protrusions are either arc-shaped protrusions formed by stamping on the left side plate or right side plate, or downward-folded flaps formed by punching on the left side plate or right side plate.

[0011] Preferably, the lower extension is provided with reinforcing ribs; the pressure block is made of spring steel.

[0012] Preferably, the pressure block is made of sheet metal, and in the sheet metal unfolded part of the pressure block, the upper narrow part of the front side plate forms a gap with the left side plate and the right side plate respectively, and the upper narrow part of the rear side plate forms a gap with the left side plate and the right side plate respectively.

[0013] After the front and rear side plates are bent downwards, a gap is formed between the vertical rear surface of the upper narrow portion of the front side plate and the front surface of the first transition plate and / or the front surface of the second transition plate; a gap is formed between the vertical front surface of the upper narrow portion of the rear side plate and the rear surface of the first transition plate and / or the rear surface of the second transition plate.

[0014] Preferably, the lower extensions of the front and rear side panels are respectively provided with snap-fit ​​structures. The snap-fit ​​structures include stamping grooves and bending pieces. The bending pieces of the lower extension of the front side panel are bent inward or outward relative to the front side panel, and the bending pieces of the lower extension of the rear side panel are bent inward or outward relative to the rear side panel. The bending pieces of the front side panel and the lower extension of the front side panel form a first snap-fit ​​groove, and the bending pieces of the rear side panel and the lower extension of the rear side panel form a second snap-fit ​​groove.

[0015] Alternatively, the snap-fit ​​structure may be a curled edge provided on the lower edge of the lower extension of the front side plate and the rear side plate, wherein the curled edge of the front side plate is curled inward or outward relative to the front side plate, and the curled edge of the rear side plate is curled inward or outward relative to the rear side plate; the curled edge of the front side plate and the lower extension of the front side plate form a first snap-fit ​​groove, and the curled edge of the rear side plate and the lower extension of the rear side plate form a second snap-fit ​​groove.

[0016] Secondly, a photovoltaic system includes a photovoltaic module, a purlin, and the aforementioned clamping block. The purlin has a purlin top plate, the photovoltaic module is mounted on the purlin top plate, the clamping block's top plate and front and rear side plates are inserted into the gaps formed by adjacent photovoltaic modules, and the left and right side plates of the clamping block respectively abut against the frame surfaces of adjacent photovoltaic modules.

[0017] Preferably, one or more downward-facing protrusions formed by the left and / or right sides of the pressure block abut against the frame surface of the photovoltaic module.

[0018] Thirdly, a photovoltaic system includes a photovoltaic module, a purlin, and the aforementioned pressure block, wherein the purlin has a purlin top plate, the photovoltaic module is mounted on the purlin top plate, and the pressure block top plate and the front and rear side plates are inserted into the gap formed by adjacent photovoltaic modules.

[0019] The bending piece of the lower extension of the front side plate of the pressure block is bent inward relative to the front side plate, and the bending piece of the lower extension of the rear side plate of the pressure block is bent inward relative to the rear side plate; or, the curled edge of the front side plate is curled inward relative to the front side plate, and the curled edge of the rear side plate is curled inward relative to the rear side plate.

[0020] The first side plate of the purlin has at least one snap-fit ​​slot. The bent piece of the front or rear side plate of the pressure block passes through the snap-fit ​​slot and places the first side plate of the purlin into the first snap-fit ​​slot or the second snap-fit ​​slot; or, the curled edge of the lower edge of the lower extension of the front or rear side plate of the pressure block passes through the snap-fit ​​slot and places the first side plate of the purlin into the first snap-fit ​​slot or the second snap-fit ​​slot.

[0021] The second side plate on the opposite side of the purlin is inserted into the second or first locking groove of the pressure block.

[0022] Fourthly, a photovoltaic system includes a photovoltaic module, a purlin, and the aforementioned clamping block. The purlin has a purlin top plate, the photovoltaic module is mounted on the purlin top plate, and the clamping block's top plate and front and rear side plates are inserted into the gaps formed by adjacent photovoltaic modules.

[0023] The top plate of the purlin is divided into a left top plate and a right top plate. The edges of the left top plate and the right top plate are respectively bent inward to form a third side plate and a fourth side plate. The third side plate and the fourth side plate form a gap for the front and rear side plates of the pressure block to extend into.

[0024] The bending piece of the lower extension of the front side plate of the pressure block is bent outward relative to the front side plate, and the bending piece of the lower extension of the rear side plate of the pressure block is bent outward relative to the rear side plate; or, the curled edge of the front side plate is curled outward relative to the front side plate, and the curled edge of the rear side plate is curled outward relative to the rear side plate.

[0025] The third side plate and the fourth side plate are respectively placed into the first snap-fit ​​groove and the second snap-fit ​​groove of the pressure block.

[0026] The beneficial effects of this utility model are as follows: In this utility model, a first transition plate is added between the top plate of the pressure block and the left side plate, and a second transition plate is added between the top plate of the pressure block and the right side plate. The front side plate or the rear side plate has an upper narrow part, which is connected to the top plate of the pressure block. When the top plate of the pressure block is pressed down by an external force, the first transition plate and the second transition plate are more likely to deform, making them flat relative to the top plate of the pressure block. The left side plate and the right side plate are also more likely to become flat during the pressing process, making the pressure block easier to install. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of the pressing block according to Embodiment 1 of this utility model. Figure 1 ;

[0028] Figure 2 This is a three-dimensional schematic diagram of the pressing block according to Embodiment 1 of this utility model. Figure 2 ;

[0029] Figure 3 This is a front view schematic diagram of the pressing block according to Embodiment 1 of this utility model;

[0030] Figure 4 This is a left-side view of the pressing block according to Embodiment 1 of this utility model;

[0031] Figure 5 This is a sheet metal unfolded view of the pressure block according to Embodiment 1 of this utility model;

[0032] Figure 6 This is a three-dimensional schematic diagram of the pressing block according to Embodiment 2 of this utility model;

[0033] Figure 7 This is a schematic diagram of the installation of the pressure block and purlin in Embodiment 1 of this utility model. Figure 1 ;

[0034] Figure 8 This is a schematic diagram of the installation of the pressure block and purlin in Embodiment 1 of this utility model. Figure 2 ;

[0035] Figure 9 This is a schematic diagram of the installation of the pressure block and purlin in Embodiment 3 of this utility model;

[0036] Figure 10 This is a schematic diagram of the installation of the pressure block and purlin in Embodiment 4 of this utility model;

[0037] Figure 11 This is a schematic diagram of the installation of the pressure block and purlin in Embodiment 5 of this utility model;

[0038] Among them: 100, top plate of pressure block; 101, front side plate; 102, rear side plate; 103, left side plate; 104, right side plate; 105, first transition plate; 106, second transition plate; 201, upper narrow part; 202, lower extension part; 203, bending piece; 204, rolled edge; 205, arc-shaped protrusion; 206, folded piece; 300, purlin; 301, snap-fit ​​groove. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0040] like Figures 1-5 As shown in Embodiment 1, a pressure block with a narrow section includes a pressure block top plate 100, characterized in that: the pressure block top plate 100 is provided with a front side plate 101 and a rear side plate 102 extending downward on its front and rear sides, the pressure block top plate 100 is provided with a left side plate 103 and a right side plate 104 on its left and right sides, a first transition plate 105 is connected between the pressure block top plate 100 and the left side plate 103, and a second transition plate 106 is connected between the pressure block top plate 100 and the right side plate 104;

[0041] The front side panel 101 and / or the rear side panel 102 have an upper narrow portion 201 and a lower extension portion 202. The upper end of the upper narrow portion 201 is connected to the top panel, and the width of the upper narrow portion 201 is smaller than the width of the lower extension portion 202.

[0042] Specifically, in one alternative implementation, such as Figure 3 As shown, the first transition plate 105 and the second transition plate 106 are inclined downward relative to the top plate, and the left side plate 103 and the right side plate 104 are inclined upward relative to the first transition plate 105 and the second transition plate 106, respectively. In the forward-looking direction, the lower edge of the first transition plate 105 or the second transition plate 106 forms an angle α with the side edge of the upper narrow portion 201, and the lower edge of the left side plate 103 or the right side plate 104 forms an angle β with the side edge of the upper narrow portion 201, where β > α.

[0043] Specifically, in one optional embodiment, the included angle α ranges from 65°±10°; and the included angle β ranges from 73°±10°.

[0044] The original pressure block has no upper narrow section 201 on the front side plate 101 or rear side plate 102, no first transition plate 105 between the pressure block top plate 100 and the left side plate 103, and no second transition plate 106 between the pressure block top plate 100 and the right side plate 104. When using this kind of pressure block, it is difficult to press down, and the left side plate 103 or right side plate 104 is less likely to produce elastic deformation relative to the pressure block top plate 100. In this utility model, a first transition plate 105 is added between the top plate 100 of the pressure block and the left side plate 103, and a second transition plate 106 is added between the top plate 100 of the pressure block and the right side plate 104. The front side plate 101 or the rear side plate 102 has an upper narrow portion 201, which is connected to the top plate 100 of the pressure block. The upper narrow portion 201 forms a gap with the first transition plate 105 and the second transition plate 106. When the top plate 100 of the pressure block is pressed down by an external force, the first transition plate 105 and the second transition plate 106 are more likely to deform, making them flat relative to the top plate 100 of the pressure block. The left side plate 103 and the right side plate 104 are also more likely to become flat during the pressing process, making the pressure block easier to install.

[0045] Specifically, in one optional embodiment, the left side plate 103 and / or the right side plate 104 are formed with one or more protrusions facing downwards. Specifically, in one optional embodiment,

[0046] like Figure 2 , Figure 3 As shown, the protrusion is an arc-shaped protrusion 205 formed by stamping on the left side plate 103 or the right side plate 104.

[0047] Alternatively, in embodiment two, a pressure block with a narrow section, such as Figure 6 As shown, the difference from Embodiment 1 is that the protrusion is a downwardly folded flap 206 formed by punching on the left side plate 103 or the right side plate 104.

[0048] Specifically, in one optional embodiment, the lower extension 202 is provided with reinforcing ribs; the material of the pressure block is spring steel, and the spring steel material is C67S.

[0049] Specifically, in one alternative implementation, such as Figure 5 As shown, the pressure block is made of sheet metal. In the sheet metal unfolded part of the pressure block, the upper narrow part 201 of the front side plate 101 forms a gap with the left side plate 103 and the right side plate 104 respectively, and the upper narrow part 201 of the rear side plate 102 forms a gap with the left side plate 103 and the right side plate 104 respectively.

[0050] After the front side plate 101 and the rear side plate 102 are bent downwards, a gap is formed between the vertical rear surface of the upper narrow portion 201 of the front side plate 101 and the front surface of the first transition plate 105 and / or the front surface of the second transition plate 106; a gap is formed between the vertical front surface of the upper narrow portion 201 of the rear side plate 102 and the rear surface of the first transition plate 105 and / or the rear surface of the second transition plate 106.

[0051] Specifically, in one optional embodiment, as shown in the figure, the lower extensions 202 of the front side plate 101 and the rear side plate 102 are respectively provided with snap-fit ​​structures. The snap-fit ​​structures include stamping grooves and bending pieces 203. The bending pieces 203 of the lower extensions 202 of the front side plate 101 are bent inward or outward relative to the front side plate 101, and the bending pieces 203 of the lower extensions 202 of the rear side plate 102 are bent inward or outward relative to the rear side plate 102. The bending pieces 203 of the front side plate 101 and the lower extensions 202 of the front side plate 101 form a first snap-fit ​​groove, and the bending pieces 203 of the rear side plate 102 and the lower extensions 202 of the rear side plate 102 form a second snap-fit ​​groove.

[0052] Alternatively, the snap-fit ​​structure may be a curled edge provided on the lower edge of the lower extension 202 of the front side plate 101 and the rear side plate 102, wherein the curled edge of the front side plate 101 is curled inward or outward relative to the front side plate 101, and the curled edge of the rear side plate 102 is curled inward or outward relative to the rear side plate 102; the curled edge of the front side plate 101 and the lower extension 202 of the front side plate 101 form a first snap-fit ​​groove, and the curled edge of the rear side plate 102 and the lower extension 202 of the rear side plate 102 form a second snap-fit ​​groove.

[0053] In a second aspect, a photovoltaic system includes a photovoltaic module, a purlin 300, and a clamping block, wherein the purlin 300 has a purlin 300 top plate, the photovoltaic module is mounted on the purlin 300 top plate, and the clamping block top plate 100 and the front side plate 101 and rear side plate 102 are inserted into the gap formed by adjacent photovoltaic modules;

[0054] One or more downward-facing protrusions formed by the left side plate 103 and / or right side plate 104 of the pressure block abut against the frame surface of the photovoltaic module.

[0055] Thirdly, a photovoltaic system includes a photovoltaic module, a purlin 300, and a clamping block, wherein the purlin 300 has a purlin 300 top plate, the photovoltaic module is mounted on the purlin 300 top plate, and the clamping block top plate 100 and the front side plate 101 and rear side plate 102 are inserted into the gap formed by adjacent photovoltaic modules;

[0056] The bending piece 203 of the lower extension 202 of the front side plate 101 of the pressure block is bent inward relative to the front side plate 101, and the bending piece 203 of the lower extension 202 of the rear side plate 102 of the pressure block is bent inward relative to the rear side plate 102; or, the curled edge of the front side plate 101 is curled inward relative to the front side plate 101, and the curled edge of the rear side plate 102 is curled inward relative to the rear side plate 102.

[0057] The first side plate of the purlin 300 has at least one snap-fit ​​slot 301. The bent piece 203 of the front side plate 101 or the rear side plate 102 of the pressure block passes through the snap-fit ​​slot 301 and places the first side plate of the purlin 300 into the first snap-fit ​​groove or the second snap-fit ​​groove; or, the curled edge of the lower edge of the lower extension 202 of the front side plate 101 or the rear side plate 102 of the pressure block passes through the snap-fit ​​slot 301 and places the first side plate of the purlin 300 into the first snap-fit ​​groove or the second snap-fit ​​groove.

[0058] The second side plate on the opposite side of the purlin 300 is inserted into the second or first locking groove of the pressure block.

[0059] Fourthly, a photovoltaic system includes a photovoltaic module, a purlin 300, and a clamping block. The purlin 300 has a top plate, the photovoltaic module is mounted on the top plate of the purlin 300, the clamping block top plate 100 and the front side plate 101 and rear side plate 102 of the clamping block are inserted into the gap formed by adjacent photovoltaic modules, and the left side plate 103 and right side plate 104 of the clamping block abut against the frame surface of the adjacent photovoltaic module, respectively.

[0060] The top plate of the purlin 300 is divided into a left top plate and a right top plate. The edges of the left top plate and the right top plate are respectively bent inward to form a third side plate and a fourth side plate. The third side plate and the fourth side plate form a gap for the front and rear side plates 102 of the pressure block to extend into.

[0061] The bending piece 203 of the lower extension 202 of the front side plate 101 of the pressure block is bent outward relative to the front side plate 101, and the bending piece 203 of the lower extension 202 of the rear side plate 102 of the pressure block is bent outward relative to the rear side plate 102; or, the curled edge of the front side plate 101 is curled outward relative to the front side plate 101, and the curled edge of the rear side plate 102 is curled outward relative to the rear side plate 102.

[0062] The third side plate and the fourth side plate are respectively placed into the first snap-fit ​​groove and the second snap-fit ​​groove of the pressure block.

[0063] Specifically, in one alternative implementation, such as Figure 7 , Figure 8As shown, the bending piece 203 of the lower extension 202 of the front side plate 101 of the pressure block is bent inward relative to the front side plate 101, and the bending piece 203 of the lower extension 202 of the rear side plate 102 of the pressure block is bent inward relative to the rear side plate 102.

[0064] The first side plate of the purlin 300 has at least one snap-fit ​​slot 301. The bent piece 203 of the rear side plate 102 of the pressure block passes through the snap-fit ​​slot 301 and places the first side plate of the purlin 300 into the first snap-fit ​​groove. The second side plate of the purlin 300 on the opposite side is placed into the second snap-fit ​​groove of the pressure block.

[0065] Specifically, in one optional implementation, the pressing block of Embodiment 3, such as Figure 9 As shown, the difference from Embodiment 1 is that the curled edge of the front side panel 101 is curled inward relative to the front side panel 101, and the curled edge of the rear side panel 102 is curled inward relative to the rear side panel 102.

[0066] The first side plate of the purlin 300 has at least one snap-fit ​​slot 301, and the curled edge of the lower edge of the lower extension 202 of the rear side plate 102 of the pressure block passes through the snap-fit ​​slot 301 and places the first side plate of the purlin 300 into the first snap-fit ​​groove.

[0067] The second side plate on the opposite side of the purlin 300 is inserted into the second snap-fit ​​groove of the pressure block.

[0068] Specifically, in one alternative implementation, such as Figure 10 As shown, the top plate of the purlin 300 is divided into a left top plate and a right top plate. The edges of the left top plate and the right top plate are respectively bent inward to form a third side plate and a fourth side plate. The third side plate and the fourth side plate form a gap between them for the front and rear side plates 102 of the pressure block to extend into.

[0069] The pressing block in Example 4, such as Figure 10 As shown, the difference from Embodiment 1 is that the bending piece 203 of the lower extension 202 of the front side plate 101 of the pressure block is bent outward relative to the front side plate 101, and the bending piece 203 of the lower extension 202 of the rear side plate 102 of the pressure block is bent outward relative to the rear side plate 102.

[0070] The third side plate and the fourth side plate are respectively placed into the first snap-fit ​​groove and the second snap-fit ​​groove of the pressure block.

[0071] Specifically, in one alternative implementation, such as Figure 11 As shown, the top plate of the purlin 300 is divided into a left top plate and a right top plate. The edges of the left top plate and the right top plate are respectively bent inward to form a third side plate and a fourth side plate. The third side plate and the fourth side plate form a gap between them for the front and rear side plates 102 of the pressure block to extend into.

[0072] The pressing block of Example 5, such as Figure 11 As shown, the difference from Embodiment 1 is that the curled edge of the front side panel 101 curls outward relative to the front side panel 101, and the curled edge of the rear side panel 102 curls outward relative to the rear side panel 102.

[0073] The third side plate and the fourth side plate are respectively placed into the first snap-fit ​​groove and the second snap-fit ​​groove of the pressure block.

[0074] When assembling the pressure block, photovoltaic modules, and purlins 300, the front and rear side plates 102 of the pressure block are located in the gaps between adjacent photovoltaic modules. Pressing the pressure block downwards causes the left side plate 103 and right side plate 104 of the pressure block to contact the frame of the photovoltaic module. Continuing to press downwards, the first transition plate 105, second transition plate 106, left side plate 103, and right side plate 104 deform under pressure, causing the top plate 100 of the pressure block to change from inclined to relatively flat. One or more downward-facing protrusions formed on the left side plate 103 or right side plate 104 of the pressure block contact the frame of the photovoltaic module, increasing the contact area between the left side plate 103 or right side plate 104 and the frame of the photovoltaic module, reducing the squeezing force on the frame of the photovoltaic module at the edges of the left side plate 103 or right side plate 104, and making the frame of the photovoltaic module less prone to breakage.

[0075] The bent piece 203 or rolled edge 204 of the pressure block engages with the snap-fit ​​slot 301 provided in the purlin 300, thereby limiting the vertical movement of the pressure block and the purlin 300. Photovoltaic modules are then installed on the purlin 300, making the installation of the photovoltaic modules and the purlin 300 more stable, with the pressure block providing connection and limitation in the vertical direction. Furthermore, the snap-fit ​​slot 301 has a certain width, which also limits the movement of the pressure block within the width direction of the snap-fit ​​slot 301, preventing it from sliding around unnecessarily.

[0076] The above description is only a specific embodiment of the present utility model. Various examples and illustrations do not constitute a limitation on the substantive content of the present utility model. Those skilled in the art can modify or transform the above-described specific embodiments after reading the description without departing from the essence and scope of the utility model.

Claims

1. A pressure block having a narrow section, comprising a pressure block top plate (100), characterized in that: The top plate (100) of the pressing block is provided with a front side plate (101) and a rear side plate (102) extending downward on the front and rear sides. The top plate (100) of the pressing block is provided with a left side plate (103) and a right side plate (104) on the left and right sides. A first transition plate (105) is connected between the top plate (100) and the left side plate (103), and a second transition plate (106) is connected between the top plate (100) and the right side plate (104). The front side panel (101) and / or the rear side panel (102) have an upper narrow portion (201) and a lower extension portion (202), the upper end of the upper narrow portion (201) being connected to the top panel, and the width of the upper narrow portion (201) being smaller than the width of the lower extension portion (202).

2. The pressure block with a narrow section according to claim 1, characterized in that: The first transition plate (105) and the second transition plate (106) are inclined downward relative to the top plate, and the left side plate (103) and the right side plate (104) are inclined upward relative to the first transition plate (105) and the second transition plate (106), respectively. In the forward view direction, the lower edge of the first transition plate (105) or the second transition plate (106) forms an angle α with the side edge of the upper narrow part (201), and the lower edge of the left side plate (103) or the right side plate (104) forms an angle β with the side edge of the upper narrow part (201), where β > α.

3. The pressure block with a narrow portion according to claim 2, characterized in that: The included angle α ranges from 65° to 10°; the included angle β ranges from 73° to 10°.

4. The pressure block with a narrow section according to claim 1, characterized in that: The left side plate (103) and / or the right side plate (104) are formed with one or more protrusions facing downwards. The protrusions are either arc-shaped protrusions (205) formed by stamping on the left side plate (103) or the right side plate (104), or downwardly folded flaps (206) formed by punching on the left side plate (103) or the right side plate (104).

5. The pressure block with a narrow portion according to claim 1, characterized in that: The lower extension (202) is provided with reinforcing ribs; the material of the pressure block is spring steel.

6. The pressure block with a narrow portion according to claim 1, characterized in that: The pressure block is made of sheet metal. In the sheet metal unfolded part of the pressure block, the upper narrow part (201) of the front side plate (101) forms a gap with the left side plate (103) and the right side plate (104), respectively. The upper narrow part (201) of the rear side plate (102) forms a gap with the left side plate (103) and the right side plate (104), respectively. After the front side plate (101) and the rear side plate (102) are bent downwards, a gap is formed between the vertical rear surface of the upper narrow portion (201) of the front side plate (101) and the front surface of the first transition plate (105) and / or the front surface of the second transition plate (106); a gap is formed between the vertical front surface of the upper narrow portion (201) of the rear side plate (102) and the rear surface of the first transition plate (105) and / or the rear surface of the second transition plate (106).

7. The pressure block with a narrow portion according to claim 1, characterized in that: The lower extensions (202) of the front side plate (101) and the rear side plate (102) are respectively provided with snap-fit ​​structures. The snap-fit ​​structures include stamping grooves and bending pieces (203). The bending pieces (203) of the lower extensions (202) of the front side plate (101) are bent inward or outward relative to the front side plate (101). The bending pieces (203) of the lower extensions (202) of the rear side plate (102) are bent inward or outward relative to the rear side plate (102). The bending pieces (203) of the front side plate (101) and the lower extensions (202) of the front side plate (101) form a first snap-fit ​​groove. The bending pieces (203) of the rear side plate (102) and the lower extensions (202) of the rear side plate (102) form a second snap-fit ​​groove. Alternatively, the snap-fit ​​structure may be a curled edge provided on the lower edge of the lower extension (202) of the front side plate (101) and the rear side plate (102), wherein the curled edge of the front side plate (101) is curled inward or outward relative to the front side plate (101), and the curled edge of the rear side plate (102) is curled inward or outward relative to the rear side plate (102); the curled edge of the front side plate (101) and the lower extension (202) of the front side plate (101) form a first snap-fit ​​groove, and the curled edge of the rear side plate (102) and the lower extension (202) of the rear side plate (102) form a second snap-fit ​​groove.

8. A photovoltaic system, characterized in that: The device includes a photovoltaic module, a purlin (300), and a pressure block as described in any one of claims 1-6. The purlin (300) has a purlin (300) top plate. The photovoltaic module is mounted on the purlin (300) top plate. The pressure block top plate (100) and the front side plate (101) and rear side plate (102) of the pressure block are inserted into the gap formed by the adjacent photovoltaic modules. The left side plate (103) and right side plate (104) of the pressure block abut against the frame surface of the adjacent photovoltaic modules, respectively.

9. The photovoltaic system according to claim 8, characterized in that: The left side plate (103) and / or right side plate (104) of the pressure block form one or more downward-facing protrusions that abut against the frame surface of the photovoltaic module.

10. A photovoltaic system, characterized in that: The device includes a photovoltaic module, a purlin (300), and a pressure block as described in claim 7, wherein the purlin (300) has a purlin (300) top plate, the photovoltaic module is mounted on the purlin (300) top plate, and the pressure block top plate (100) of the pressure block and the gap formed by the front side plate (101) and the rear side plate (102) of the adjacent photovoltaic module are inserted. The bending piece (203) of the lower extension (202) of the front side plate (101) of the pressure block is bent inward relative to the front side plate (101), and the bending piece (203) of the lower extension (202) of the rear side plate (102) of the pressure block is bent inward relative to the rear side plate (102); or, the curled edge of the front side plate (101) is curled inward relative to the front side plate (101), and the curled edge of the rear side plate (102) is curled inward relative to the rear side plate (102). The first side plate of the purlin (300) has at least one snap-fit ​​slot (301), and the bent piece (203) of the front side plate (101) or rear side plate (102) of the pressure block passes through the snap-fit ​​slot (301) and places the first side plate of the purlin (300) into the first snap-fit ​​groove or the second snap-fit ​​groove; or, the curled edge of the lower edge of the lower extension (202) of the front side plate (101) or rear side plate (102) of the pressure block passes through the snap-fit ​​slot (301) and places the first side plate of the purlin (300) into the first snap-fit ​​groove or the second snap-fit ​​groove; The second side plate on the opposite side of the purlin (300) is inserted into the second or first locking groove of the pressure block.

11. A photovoltaic system, characterized in that: The device includes a photovoltaic module, a purlin (300), and a pressure block as described in claim 7, wherein the purlin (300) has a purlin (300) top plate, the photovoltaic module is mounted on the purlin (300) top plate, and the pressure block top plate (100) of the pressure block and the gap formed by the front side plate (101) and the rear side plate (102) of the adjacent photovoltaic module are inserted. The top plate of the purlin (300) is divided into a left top plate and a right top plate. The edges of the left top plate and the right top plate are respectively bent inward to form a third side plate and a fourth side plate. The third side plate and the fourth side plate form a gap for the front and rear side plates (102) of the pressure block to extend into. The bending piece (203) of the lower extension (202) of the front side plate (101) of the pressure block is bent outward relative to the front side plate (101), and the bending piece (203) of the lower extension (202) of the rear side plate (102) of the pressure block is bent outward relative to the rear side plate (102); or, the curled edge of the front side plate (101) is curled outward relative to the front side plate (101), and the curled edge of the rear side plate (102) is curled outward relative to the rear side plate (102). The third side plate and the fourth side plate are respectively placed into the first snap-fit ​​groove and the second snap-fit ​​groove of the pressure block.

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