Differential pressure bypass valve for water collecting and distributing device

Abstract

The utility model discloses a differential pressure bypass valve for a water collecting and distributing device, which relates to the technical field of bypass valves and comprises a bypass valve body provided with an inlet pipe and a discharge pipe. The axes of the inlet pipe and the outlet pipe are parallel and spaced; the axis of the inlet pipe and the axis of the water distribution main pipe of the water collection and distribution device are positioned on the same plane; the axis of the discharge pipe and the axis of the water collecting main pipe of the water collecting and distributing device are located on the same plane. And the adaptability is improved, and assembly and use are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of bypass valves, in particular to a pressure difference bypass valve used for a water collector and manifold. Background Art

[0002] Water-cooled air-conditioning systems are increasingly used due to their comfort, health, and environmental protection advantages. Their main feature is that the cold (heat) of the cold (heat) source is brought into the room for use through water. A water circulation system is formed between the main unit's heat exchanger, pump, and indoor fan (floor heating) terminals through pipes. However, in actual application, the load at the terminal often changes, and this change will bring about changes in the system's operating conditions. The pressure differential bypass valve is a key device to ensure stable and reliable operation of the main unit and terminal during load changes. The valve mainly realizes its function by dynamically adjusting the valve opening size through its built-in spring structure.

[0003] The impact of traditional water-cooled air-conditioning systems on the fluorine-cooled air-conditioning market is obvious. More and more fluorine-cooled air-conditioning manufacturers have also launched their corresponding water-cooled systems. For reasons of system, cost and other aspects, the natural fluorine-cooled and ground-water system has also become one of the important application methods to enter the air-conditioning field. As the name suggests, the natural fluorine-cooled and ground-water system refers to the working mode of the fluorine-cooled machine during cooling. The refrigerant runs directly in the main unit and the fan disk. When heating, the heat is transferred to the indoor floor heating system through the water module using water. Therefore, a pressure differential bypass device must be used when running this water system. In the natural fluorine-cooled and ground-water system, this valve is generally installed in the position of the indoor floor heating manifold. The valve performance, installation size, adjustment position and other conditions make it difficult for ordinary angle and straight pressure differential bypasses to be well assembled and used. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure differential bypass valve for a manifold to solve the problems existing in the above-mentioned prior art, improve adaptability and facilitate assembly and use.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides a pressure differential bypass valve for a manifold and a water distributor, comprising a bypass valve body, wherein the bypass valve body has an inlet pipe and a discharge pipe; the axes of the inlet pipe and the discharge pipe are parallel and spaced apart; the axis of the inlet pipe and the axis of the water distribution main pipe of the manifold and the water distributor are located in the same plane; the axis of the discharge pipe and the axis of the water collection main pipe of the manifold and the water distributor are located in the same plane.

[0007] Preferably, the bypass valve body has a valve cap and an adjusting mechanism, and the valve cap has an inner groove; the adjusting mechanism is used to adjust the flow rate of the bypass valve body, and the adjusting mechanism is arranged in the inner groove.

[0008] Preferably, a light hole is provided at the end of the inlet pipe and / or the outlet pipe; an extension pipe is passed through the light hole; the extension pipe is sealed and fixedly connected to the end of the inlet pipe and / or the outlet pipe having the light hole through a connecting piece; the end of the extension pipe is connected to a tee, and the tee is used to communicate with the water distribution main pipe or the water collection main pipe of the water collector.

[0009] Preferably, the bypass valve body includes a valve body and a valve cap; the valve body has an accommodating chamber and an installation port connected to the accommodating chamber, the inlet pipe and the outlet pipe are fixedly arranged on the valve body, the inlet pipe is connected to the accommodating chamber through the communicating port, and one end of the outlet pipe is connected to the accommodating chamber; the valve cap is sealed and fixedly arranged at the installation port, and a sliding tube is fixedly arranged in the inner groove of the valve cap, the upper end of the sliding tube protrudes from the inner bottom of the inner groove, the lower end of the sliding tube is located in the accommodating chamber, and the lower end opening of the sliding tube is connected to the accommodating chamber; the adjusting mechanism includes a scale disk tube, a screw-in handle, a valve stem, a spring and a sealing cap; the scale disk tube is fixedly sleeved on the outer surface of the upper end of the sliding tube side; the scale disk tube has an upper opening, and the upper end of the screw-in handle is slidably arranged in the upper opening along the axial direction of the sliding tube; the lower end of the screw-in handle is threadedly connected to the valve stem; the valve stem can only be slid in the sliding tube along the axial direction of the sliding tube, and the lower end of the valve stem can abut against the upper end of the spring; the lower end of the spring abuts against the sealing cap, and the sealing cap is slidably arranged in the connecting port along the axial direction of the sliding tube, and the sealing cap can change the flow rate of the connecting port; a limiting ring plate is fixedly provided on the side wall of the upper end of the screw-in handle, and the limiting ring plate can limit the screw-in handle from moving along the axis of the scale disk tube toward the upper opening away from the valve stem.

[0010] Preferably, a scale is provided on the end surface of the graduated coil tube away from the valve stem, and an indicator line is provided on the upper end surface of the screw-in handle.

[0011] Preferably, at least one limiting protrusion is fixedly provided at the upper end opening of the sliding tube, and at least one limiting groove is provided on the side wall of the valve stem; the limiting groove corresponds one-to-one to the limiting protrusion, and the limiting groove can slide relative to the limiting protrusion along the axial direction of the sliding tube.

[0012] Preferably, a fixed limit block is provided between the lower end of the valve stem and the upper end of the spring; a limit groove is provided at the lower end of the valve stem, and a limit boss is fixedly provided at the upper end of the fixed limit block, and the limit boss is located in the limit groove; an annular baffle and a middle guide column are fixedly provided at the lower end of the fixed limit block; the upper end of the spring is sleeved on the middle guide column, and the upper end of the spring abuts against the lower end surface of the annular baffle.

[0013] Preferably, a guide tube is fixedly provided on the upper end of the sealing cap; the upper end of the guide tube is slidably provided in the sliding tube along the axial direction of the sliding tube; and the lower end of the spring abuts against the inner bottom of the guide tube.

[0014] Preferably, the upper end of the screw-in handle is provided with a hexagonal groove.

[0015] Preferably, an internal threaded hole is provided at the upper end of the valve stem, and the lower end of the screw-in handle is threadedly connected to the internal threaded hole; a connecting channel is provided on the screw-in handle, the upper end of the connecting channel is connected to the hexagonal groove, and the lower end of the connecting channel is connected to the internal threaded hole.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The utility model provides a pressure differential bypass valve for a manifold and a water collector, in which the axis of the inlet pipe and the axis of the water distribution main pipe are located in the same plane, and the axis of the discharge pipe and the axis of the water collecting main pipe are located in the same plane. The valve has a one-to-one correspondence with the water supply end and the return end of the manifold and a water collector. This layout allows the bypass valve to be installed better and more directly when connected to the manifold and a water collector, improves its adaptability to the installation components, and facilitates assembly and use.

[0018] Furthermore, the valve cap adopts a sunken structure for the regulating mechanism, which can make the regulating mechanism less protruding than the existing structure, and the structural layout is more compact, so that the overall size of the valve will not be too large, so that it can be placed in a box containing a water distributor.

[0019] Furthermore, the arrangement of the light hole in combination with the extension tube can achieve flexible coordination of the distance between the water distribution main pipe and the water collection main pipe of the water collector and the water distributor, making it suitable for installation at different distances between the water distribution main pipe and the water collection main pipe in its axial direction.

[0020] Furthermore, in the natural state, due to the rebound force of the spring, one end of the screw-in handle can abut against the sealing cap, and the other end can abut against the valve stem and drive the upper end of the screw-in handle to abut against the inner side of the scale disk tube; when adjustment is needed, by rotating the screw-in handle, based on the threaded connection between the screw-in handle and the valve stem, the screw-in handle moves to the side away from the valve stem, and the valve stem moves to the side close to the spring. Due to the setting of the limiting ring plate on the screw-in handle, the valve stem can be stably moved to the side close to the spring to achieve adjustment.

[0021] Furthermore, the scale is arranged on the end face of the scale coil tube, that is, the scale faces the outside of the installed box, which is convenient for intuitive observation and adjustment.

[0022] Furthermore, the cooperation between the limiting protrusion and the limiting groove enables the valve stem to stably move along the axial direction of the sliding tube without rotating.

[0023] Furthermore, the fixed limit block cooperates with the limit groove at the lower end of the valve stem through the limit protrusion, making the connection between the valve stem and the spring more stable; the middle guide column of the fixed limit block provides a guide for the spring, so that the spring can only expand and contract along the axial direction of the middle guide column.

[0024] Furthermore, the upper end of the guide tube slides in the sliding tube along the axial direction, providing precise movement guidance for the sealing cap, making the movement of the sealing cap more stable.

[0025] Furthermore, the provision of the hexagonal groove facilitates the use of tools to achieve rotation of the screw-in handle.

[0026] Furthermore, the arrangement of the communication channel enables the internal threaded hole to be connected to the outside world when the screw-in handle moves relative to the valve stem, thereby reducing the generation of a negative pressure environment that hinders the rotation operation of the screw-in handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the overall structure of the pressure differential bypass valve for a manifold provided by the utility model;

[0029] Figure 2 for Figure 1 Schematic diagram of the cross-section structure;

[0030] Figure 3A schematic diagram of the connection and use of the pressure differential bypass valve for a manifold provided by the utility model;

[0031] Figure 4 for Figure 3 Schematic diagram of the cross-section structure.

[0032] In the picture:

[0033] 10-valve body; 11-inlet pipe; 12-outlet pipe;

[0034] 20-valve cap; 21-inner groove; 22-sliding tube; 221-limiting protrusion;

[0035] 30 - adjustment mechanism; 31 - graduated disc; 311 - scale; 32 - screw-in handle; 321 - limit ring plate; 322 - hexagonal groove; 323 - communication channel; 33 - valve stem; 331 - limit groove; 332 - internal threaded hole; 34 - fixed limit block; 341 - limit boss; 342 - annular baffle; 343 - middle guide column; 35 - spring; 36 - sealing cap; 361 - guide tube; 37 - limit sleeve;

[0036] 40-Extension tube;

[0037] 50-Tee. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] The purpose of the utility model is to provide a pressure differential bypass valve for a manifold and water distributor, so as to solve the problems existing in the prior art, improve adaptability and facilitate assembly and use.

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0041] Example 1

[0042] This embodiment provides a pressure differential bypass valve for a manifold, which is mainly used, but not limited to, between the supply and return water of a manifold in a natural fluorine and ground water system. It can also be used in other water-cooling systems and systems that require pressure differential regulation, such as Figures 1 to 4As shown, the bypass valve body has an inlet pipe 11 and an outlet pipe 12; the axis of the inlet pipe 11 is parallel to the axis of the outlet pipe 12 and has a spacing; the axis of the inlet pipe 11 is in the same plane as the axis of the main water distribution pipe of the water distribution and collection device; the axis of the outlet pipe 12 is in the same plane as the axis of the main water collection pipe of the water distribution and collection device.

[0043] By having the axis of the inlet pipe 11 in the same plane as the axis of the main water distribution pipe and the axis of the outlet pipe 12 in the same plane as the axis of the main water collection pipe, the position of the water supply end and the water return end of the water distribution and collection device is one-to-one corresponding, which makes the bypass valve better and more direct when connected with the water distribution and collection device, improves the compatibility with the installation components, and facilitates assembly and use.

[0044] Among them, the related structure of the bypass valve body is explained as follows:

[0045] In the optional scheme of the present embodiment, it is more preferred that Figures 1 to 4As shown, the bypass valve body includes a valve body 10 and a valve cap 20; the valve body 10 has a receiving cavity and a mounting port communicating with the receiving cavity, the valve body 10 is fixedly provided with an inlet pipe 11 and an outlet pipe 12, the inlet pipe 11 communicates with the receiving cavity through a communication port, and one end of the outlet pipe 12 communicates with the receiving cavity; the valve cap 20 is sealingly and fixedly arranged in the mounting port, and a sliding pipe 22 is fixedly arranged in an inner recess 21 of the valve cap 20, the upper end of the sliding pipe 22 protrudes from the inner bottom of the inner recess 21, the lower end of the sliding pipe 22 is located in the receiving cavity, and the lower end opening of the sliding pipe 22 communicates with the receiving cavity; the adjusting mechanism 30 includes a dial pipe 31, a screw-in handle 32, a valve rod 33, a spring 35 and a sealing cap 36; the dial pipe 31 is fixedly sleeved outside the upper end of the sliding pipe 22; the dial pipe 31 has an upper opening, and the upper end of the screw-in handle 32 is slidingly arranged in the upper opening along the axis direction of the sliding pipe 22; the lower end of the screw-in handle 32 is threadedly connected with the valve rod 33; the valve rod 33 is slidingly arranged in the sliding pipe 22 along the axis direction of the sliding pipe 22, and the lower end of the valve rod 33 can abut against the upper end of the spring 35; the lower end of the spring 35 abuts against the sealing cap 36, the sealing cap 36 is slidingly arranged in the communication port along the axis direction of the sliding pipe 22, and the sealing cap 36 can change the flow rate of the communication port; a limiting ring plate 321 is fixedly arranged on the sidewall of the upper end of the screw-in handle 32, and the limiting ring plate 321 can limit the movement of the screw-in handle 32 away from the valve rod 33 along the axis of the dial pipe 31. In the natural state, under the rebound force of the spring 35, one end of the spring 35 abuts against the sealing cap 36, the other end abuts against the valve rod 33 and drives the upper end of the screw-in handle 32 to abut against the inside of the dial pipe 31; when adjustment is needed, the screw-in handle 32 is rotated, based on the threaded connection between the screw-in handle 32 and the valve rod 33, the screw-in handle 32 moves away from the valve rod 33, while the valve rod 33 moves towards the spring 35, and due to the arrangement of the limiting ring plate 321 on the screw-in handle 32, the valve rod 33 stably moves towards the spring 35 to achieve adjustment.

[0046] In the optional scheme of the present embodiment, more preferably, as shown in Figure 1 and Figure 3 shown, the end face of the dial pipe 31 away from the valve rod 33 is provided with a scale 311, and the upper end face of the screw-in handle 32 is provided with an indicating line. The scale 311 is arranged on the end face of the dial pipe 31, i.e. the scale 311 thereof faces outward of the installed box, which is convenient for intuitive observation and adjustment.

[0047] In the optional scheme of the present embodiment, more preferably, as shown in Figure 2 and Figure 4As shown, at least one limiting protrusion 221 is fixedly mounted at the upper opening of the sliding tube 22, and at least one limiting groove 331 is disposed on the sidewall of the valve stem 33. The limiting grooves 331 correspond one-to-one with the limiting protrusions 221, and the limiting grooves 331 can slide relative to the limiting protrusions 221 along the axis of the sliding tube 22. The cooperation between the limiting protrusions 221 and the limiting grooves 331 enables the valve stem 33 to stably move along the axis of the sliding tube 22 without rotating.

[0048] Specifically, there are two limiting protrusions 221 , which are symmetrically distributed; the limiting protrusions 221 and the sliding tube 22 are integrally formed.

[0049] Among the optional solutions of this embodiment, it is more preferred that Figure 2 As shown, a fixed stopper 34 is provided between the lower end of the valve stem 33 and the upper end of the spring 35. A limiting groove 331 is provided at the lower end of the valve stem 33, and a limiting boss 341 is fixedly provided at the upper end of the fixed stopper 34, which is located within the limiting groove 331. An annular baffle 342 and a central guide post 343 are fixedly provided at the lower end of the fixed stopper 34. The upper end of the spring 35 is sleeved on the central guide post 343, and the upper end of the spring 35 abuts against the lower end surface of the annular baffle 342. The fixed stopper 34 cooperates with the limiting groove 331 at the lower end of the valve stem 33 through the limiting boss 341, thereby further stabilizing the connection between the valve stem 33 and the spring 35. The central guide post 343 of the fixed stopper 34 provides a guide for the spring 35, so that the spring 35 can only expand and contract along the axis of the central guide post 343.

[0050] Specifically, the side wall of the middle guide column 343 is a tapered surface, and the small end of the middle guide column 343 is the lower end.

[0051] Among the optional solutions of this embodiment, it is more preferred that Figure 1 As shown, the upper end of the screw-in handle 32 is provided with an inner hexagonal groove 322. The provision of the inner hexagonal groove 322 facilitates the use of tools to realize the rotation of the screw-in handle 32.

[0052] Among the optional solutions of this embodiment, it is more preferred that Figure 2 As shown, the upper end of the valve stem 33 is provided with an internally threaded hole 332, and the lower end of the screw-in handle 32 is threadedly connected to the internally threaded hole 332. The screw-in handle 32 is provided with a communication channel 323. The upper end of the communication channel 323 communicates with the hexagonal inner groove 322, and the lower end of the communication channel 323 communicates with the internally threaded hole 332. The provision of the communication channel 323 ensures that when the screw-in handle 32 moves relative to the valve stem 33, the internally threaded hole 332 is connected to the outside world, reducing the generation of a negative pressure environment that hinders the rotation of the screw-in handle 32.

[0053] Among the optional solutions of this embodiment, it is more preferred that Figure 2 As shown, a guide tube 361 is fixedly mounted on the upper end of the sealing cap 36. The upper end of the guide tube 361 slides within the sliding tube 22 along the axis of the sliding tube 22. The lower end of the spring 35 abuts against the inner bottom of the guide tube 361. The upper end of the guide tube 361 slides along the axis within the sliding tube 22, providing precise guidance for the movement of the sealing cap 36 and ensuring more stable movement of the sealing cap 36.

[0054] Specifically, the movement of the sealing cap 36 at the communication port to adjust the flow rate is a prior art and will not be described in detail here.

[0055] Among them, the concave setting of the valve cap 20 is described as follows:

[0056] Among the optional solutions of this embodiment, it is more preferred that Figures 1 to 4 As shown, the bypass valve body comprises a bonnet 20 and an adjustment mechanism 30. The bonnet 20 has an inner groove 21. The adjustment mechanism 30 is used to adjust the flow rate of the bypass valve body and is disposed within the inner groove 21. The bonnet 20 employs a sunken structure for the adjustment mechanism 30, which reduces the protrusion of the adjustment mechanism 30 compared to existing structures, resulting in a more compact structure and a smaller overall size for the valve, allowing it to be placed in a box containing a water diverter.

[0057] Specifically, a hexagonal groove is provided in the inner groove 21 of the valve bonnet 20 to facilitate installation of the valve bonnet 20 on the valve body 10 .

[0058] In order to adapt to the different distances between the water distribution main pipe and the water collection main pipe of the water collector and manifold, the following settings can also be made:

[0059] Among the optional solutions of this embodiment, it is more preferred that Figure 4 As shown, the ends of the inlet pipe 11 and / or outlet pipe 12 are provided with a light hole; an extension pipe 40 is inserted into the light hole; the extension pipe 40 is sealed and fixedly connected to the ends of the inlet pipe 11 and / or outlet pipe 12 with the light hole via a connector; the end of the extension pipe 40 is connected to a tee 50, which is used to communicate with the water distribution main or water collection main of the manifold. The combination of the light hole and the extension pipe 40 allows for flexible coordination of the distance between the water distribution main and the water collection main of the manifold, making it suitable for installation with different spacings between the water distribution main and the water collection main along the axis.

[0060] Specifically, the connecting piece is an existing ferrule-type pipe joint connecting piece, such as a connecting piece including a ferrule, a nut and a sealing ring; the nut, the ferrule and the sealing ring are sequentially mounted on one end of the extension tube 40, and then the end of the extension tube 40 is inserted into the light hole, and the nut is threadedly connected to the inlet pipe 11 or the outlet pipe 12 with the light hole.

[0061] Specifically, the extension tube 40 is a copper tube.

[0062] Specifically, this embodiment adopts Figure 3 As shown, one end of the inlet pipe 11 is provided with an external thread directly connected to the tee 50, and one end of the outlet pipe 12 is provided with a structure cooperating with the extension pipe 40. The end of the extension pipe 40 is connected to a tee 50, and the tee 50 connected to the inlet pipe 11 and the extension pipe 40 are respectively connected to the water distribution main and the water collection main of the corresponding manifold.

[0063] Specifically, necessary annular sealing gaskets may be provided at the connection between the inlet pipe 11 and the tee 50 and at the connection between the extension pipe 40 and the corresponding tee 50 .

[0064] Among them, regarding other related instructions:

[0065] Specifically, the inner side of the lower end of the scale tube 31 is fixedly connected to the outer side of the upper end of the sliding tube 22 by threads.

[0066] Specifically, necessary sealing elements, such as sealing rings, are provided at the connection between the valve cap 20 and the valve body 10 and between the side wall of the valve stem 33 and the inner wall of the sliding tube 22 .

[0067] Specifically, a limiting sleeve 37 is fixedly provided on the outer side of the upper end of the valve stem 33 .

[0068] Specifically, the pressure differential bypass valve for the manifold in this embodiment has good bypass capability and can meet the demand of the low-temperature heat source (heat pump) for a larger bypass flow rate.

[0069] Specifically, the pressure differential bypass valve for the manifold in this embodiment adopts the above-mentioned related configuration, which has the following advantages:

[0070] 1. The dual-axis structure of the inlet pipe 11 and the outlet pipe 12 of the pressure differential bypass valve is matched with the water distribution main pipe and the water collection main pipe of the water collector and manifold respectively;

[0071] 2. The valve bonnet 20 is designed with an inner concave portion, and the graduated coil 31 is disposed inside the inner concave portion 21 of the valve bonnet 20 , making the overall structure of the pressure differential bypass valve compact. The pressure differential bypass valve is conveniently disposed in a box housing a manifold;

[0072] 3. The pressure differential bypass valve can adopt a larger diameter and a more reasonable range of use, and has sufficient bypass capacity to adapt to the large flow requirements of the heat pump heat source (the traditional wall-mounted boiler high-temperature heat source has a small flow rate and a lower requirement for bypass capacity);

[0073] 4. After the pressure differential bypass valve is installed in place, the scale 311 on the graduated coil 31 indicates that the vertical manifold installation surface faces outward, directly facing the user, making it easier for the user to observe and adjust;

[0074] 5. The outlet of the discharge pipe 12 of the pressure differential bypass valve has a light hole of a certain length. The length of the copper pipe connected to the outlet can be adjusted according to actual needs. This adjustment not only facilitates the installation of the pressure differential bypass valve in the use scenario, but also helps to match the water distribution main pipe and the water collection main pipe of the manifold in the vertical direction. Adjustment of the upper and lower spacing.

[0075] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A pressure differential bypass valve for a manifold, characterized by: The bypass valve body comprises an inlet pipe and an outlet pipe; The axes of the inlet pipe and the outlet pipe are parallel and spaced apart from each other; the axes of the inlet pipe and the water distribution main pipe of the manifold are located in the same plane; the axes of the outlet pipe and the water collection main pipe of the manifold are located in the same plane.

2. The pressure differential bypass valve for a manifold according to claim 1, characterized in that: The bypass valve body has a valve cap and an adjusting mechanism, and the valve cap has an inner groove; the adjusting mechanism is used to adjust the flow rate of the bypass valve body, and the adjusting mechanism is arranged in the inner groove.

3. The pressure differential bypass valve for a manifold according to claim 1, characterized in that: The end of the inlet pipe and / or the outlet pipe is provided with a light hole; An extension tube is provided in the light hole; the extension tube is sealed and fixedly connected to the end of the inlet tube and / or the outlet tube having the light hole through a connecting piece; The end of the extension pipe is connected with a tee, and the tee is used to communicate with the water distribution main pipe or the water collection main pipe of the water collector and distributor.

4. The pressure differential bypass valve for a manifold according to claim 2, characterized in that: The bypass valve body includes a valve body and a valve cap; The valve body has an accommodating cavity and an installation port communicating with the accommodating cavity, the valve body is fixedly provided with the inlet pipe and the outlet pipe, the inlet pipe is communicated with the accommodating cavity through the communication port, and one end of the outlet pipe is communicated with the accommodating cavity; the valve cap is sealed and fixedly provided at the installation port, and a sliding tube is fixedly provided in the inner groove of the valve cap, the upper end of the sliding tube protrudes from the inner bottom of the inner groove, the lower end of the sliding tube is located in the accommodating cavity, and the lower end opening of the sliding tube is communicated with the accommodating cavity; The regulating mechanism includes a graduated coil tube, a screw-in handle, a valve stem, a spring and a sealing cap; The scale disk tube is fixedly sleeved on the outer side of the upper end of the sliding tube; the scale disk tube has an upper opening, and the upper end of the screw-in handle is slidably arranged in the upper opening along the axial direction of the sliding tube; the lower end of the screw-in handle is threadedly connected to the valve stem; the valve stem can only be slid along the axial direction of the sliding tube in the sliding tube, and the lower end of the valve stem can abut against the upper end of the spring; the lower end of the spring abuts against the sealing cap, and the sealing cap is slidably arranged in the communicating port along the axial direction of the sliding tube, and the sealing cap can change the flow rate of the communicating port; A limiting ring plate is fixedly provided on the side wall of the upper end of the screw-in handle, and the limiting ring plate can limit the screw-in handle from moving along the axis of the scale coil tube toward the side of the upper opening away from the valve stem.

5. The pressure differential bypass valve for a manifold according to claim 4, characterized in that: The end surface of the graduated coil tube away from the valve stem is provided with a scale, and the upper end surface of the screw-in handle is provided with an indicator line.

6. The pressure differential bypass valve for a manifold according to claim 4, characterized in that: At least one limiting protrusion is fixedly provided at the upper end opening of the sliding tube, and at least one limiting groove is provided on the side wall of the valve stem; The limiting grooves correspond to the limiting protrusions one-to-one, and the limiting grooves can slide relative to the limiting protrusions along the axial direction of the sliding tube.

7. The pressure differential bypass valve for a manifold according to claim 4, characterized in that: A fixed limit block is provided between the lower end of the valve stem and the upper end of the spring; A limiting groove is provided at the lower end of the valve stem, and a limiting convex column is fixedly provided at the upper end of the fixed limiting block, and the limiting convex column is located in the limiting groove; An annular baffle and a middle guide column are fixedly provided on the lower end of the fixed limit block; the upper end of the spring is sleeved on the middle guide column, and the upper end of the spring abuts against the lower end surface of the annular baffle.

8. The pressure differential bypass valve for a manifold according to claim 4, characterized in that: A guide tube is fixedly provided on the upper end of the sealing cap; The upper end of the guide tube is slidably arranged in the sliding tube along the axial direction of the sliding tube; the lower end of the spring abuts against the inner bottom of the guide tube.

9. The pressure differential bypass valve for a manifold according to claim 4, characterized in that: The upper end of the screw-in handle is provided with a hexagonal groove.

10. The pressure differential bypass valve for a manifold according to claim 9, characterized in that: The upper end of the valve stem is provided with an internal threaded hole, and the lower end of the screw-in handle is threadedly connected to the internal threaded hole; The screw-in handle is provided with a communication channel, the upper end of the communication channel is communicated with the hexagonal groove, and the lower end of the communication channel is communicated with the internal threaded hole.

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