A constant pressure water supply device and water head adjustment method

Abstract

The present invention provides a constant pressure water supply equipment and a water head adjustment method, which are applied to the technical field of agricultural water conservancy engineering. The constant pressure water supply equipment includes a square Malchow flask and an air intake assembly; wherein: a water storage chamber is arranged inside the square Malchow flask, a water inlet is arranged at the top, and a water outlet is arranged at the bottom, and the water storage chamber is connected with the water inlet and the water outlet respectively; the air intake assembly includes: an elastic sealing plug, an air intake hose, a magnet, and a metal air outlet block placed in the water storage chamber. The present invention is arranged by the above-mentioned structure. While realizing the sealing of the water inlet, the user can drive the metal air outlet block to move up and down along the inner wall of the square Malchow flask by moving the magnet up and down, so as to adjust the water head height. Compared with the existing technology, there is no need to move the Malchow flask, the adjustment convenience is higher, the adjustment accuracy is easier to control, and it is safe and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural water conservancy engineering, and particularly to a constant pressure water supply device and a water head adjustment method. Background Art

[0002] A Mariotte bottle is a device based on the principle of a communicating vessel, which makes the pressure inside and outside the container consistent, thereby realizing a constant water head and automatic water replenishment inside the Mariotte bottle. However, the existing Mariotte bottles on the market currently have the following problems: one is poor air tightness resulting in unstable water head; the other is that the infiltration water level adjustment procedure is cumbersome.

[0003] When conducting a constant head water infiltration pressure test, during the process of adjusting the water head, a mechanical lifting platform or the method of padding something under the Mariotte bottle is often used. However, in this way, the entire Mariotte bottle moves up and down when adjusting the water head. When water flows out of the outlet of the Mariotte bottle through a hose, due to the existence of the water head loss in the hose, the actual water head will often be lower than the set water head. Therefore, it is necessary to repeatedly adjust the height of the Mariotte bottle. For a large-capacity Mariotte bottle filled with water, this mechanical adjustment method is unsafe and time-consuming and laborious.

[0004] Therefore, designing a simple, easy-to-operate, high-precision, and water level adjustable Mariotte bottle has become an urgent technical problem in this field. Summary of the Invention

[0005] The present invention provides a constant pressure water supply device and a water head adjustment method to overcome the above technical problems.

[0006] To solve the above problems, the present invention discloses a constant pressure water supply device, and the constant pressure water supply device includes a square Mariotte bottle and an air intake assembly; wherein:

[0007] A water storage chamber is arranged inside the square Mariotte bottle, a water inlet is arranged at the top end, and a water outlet is arranged at the lower end. The water storage chamber is respectively communicated with the water inlet and the water outlet;

[0008] The air intake assembly includes: an elastic sealing plug, an air intake hose, a magnet, and a metal air outlet block placed inside the water storage chamber;

[0009] One end of the elastic sealing plug is inserted into the water inlet and has a radial pressure on the water inlet, and the other end is provided with a through hole penetrating through the elastic sealing plug;

[0010] One end of the air intake hose is provided with an air intake hole, and the other end passes through the through hole and is placed inside the water storage chamber;

[0011] The magnet faces the metal air outlet block and is attached to the outer wall of the square Mariotte bottle to generate an adsorption force on the metal air outlet block;

[0012] The metal air outlet block faces the magnet and is adsorbed on the inner wall of the square Mariotte bottle. The metal air outlet block is provided with an air outlet hole and a sleeve. The air outlet hole communicates with the sleeve, and the sleeve is fixedly connected and communicates with the intake hose.

[0013] Optionally, the intake assembly further includes a pull ring and a rigid intake pipe;

[0014] One end of the intake hose provided with an intake hole is fixed to one end of the rigid intake pipe, and the other end of the rigid intake pipe is fixed to the outer wall of the pull ring. The intake hole is opened on the pull ring.

[0015] Optionally, the length of the intake hose is greater than or equal to 1.5 times the height of the square Mariotte bottle.

[0016] Optionally, an elastic airtight gasket is further provided between the elastic sealing plug and the water inlet;

[0017] A circular groove is further opened on the inner wall of the water inlet. The circular groove is coaxial with the water inlet, and the elastic airtight gasket is embedded in the circular groove.

[0018] Optionally, the magnet includes a magnet block and a handle. One end face of the magnet block is attached to the outer wall of the square Mariotte bottle, and the other end face is fixed to the handle.

[0019] Optionally, the square Mariotte bottle includes a Mariotte bottle lid and a Mariotte bottle cavity;

[0020] A circular groove is provided at the bottom end of the Mariotte bottle lid, and a circular boss is provided at the top end of the Mariotte bottle cavity. The boss and the groove cooperate with each other and are connected as a whole to seal the connection between the Mariotte bottle lid and the Mariotte bottle cavity.

[0021] Optionally, it further includes a water outlet valve, and the water outlet valve is installed at the water outlet;

[0022] A leak-proof seal is provided between the water outlet valve and the water outlet.

[0023] To solve the above problems, the present invention also discloses a water head adjustment method, which is applied to the constant pressure water supply device of the present invention. The method includes:

[0024] According to the preset water head adjustment height, determine the target water level line on the square Mariotte bottle;

[0025] Move the magnet along the axial direction of the square Mariotte bottle so that the horizontal plane where the air outlet hole of the metal air outlet block is located is flush with the target water level line.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] Through the arrangement of structures such as an elastic sealing plug, an air inlet hose, a magnet, and a metal air outlet block, while achieving the sealing of the water inlet, the user can drive the metal air outlet block to move up and down along the inner wall of the square Mariotte bottle by moving the magnet up and down, thereby realizing the adjustment of the water head height. Compared with the existing technology, there is no need to move the Mariotte bottle, the adjustment is more convenient, the adjustment accuracy is easier to control, and it is safe and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for the description of the present invention will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 is a schematic structural diagram of a constant pressure water supply device according to an embodiment of the present invention;

[0030] FIG. 2(a) is a schematic structural diagram of a Mariotte bottle cap according to an embodiment of the present invention;

[0031] FIG. 2(b) is a schematic structural diagram of a Mariotte bottle cavity according to an embodiment of the present invention;

[0032] Figure 3 is a schematic structural diagram of a water outlet valve according to an embodiment of the present invention

[0033] Figure 4 is a schematic structural diagram of an elastic sealing plug according to an embodiment of the present invention;

[0034] Figure 5 is a schematic structural diagram of an elastic airtight gasket according to an embodiment of the present invention;

[0035] FIG. 6(a) is a schematic structural diagram of an air inlet hard pipe according to an embodiment of the present invention;

[0036] FIG. 6(b) is a schematic structural diagram of an air inlet hose according to an embodiment of the present invention;

[0037] Figure 7 is a schematic structural diagram of a metal air outlet block according to an embodiment of the present invention;

[0038] Figure 8 is a schematic structural diagram of a magnet according to an embodiment of the present invention;

[0039] Figure 9 is a step flowchart of a water head adjustment method according to an embodiment of the present invention.

[0040] DESCRIPTION OF REFERENCE NUMERALS:

[0041] 1 - Square Mariotte bottle, 2 - Air inlet assembly, 101 - Water inlet, 102 - Water outlet, 103 - Mariotte bottle lid, 104 - Mariotte bottle cavity, 105 - Groove, 106 - Boss, 107 - Water outlet valve, 201 - Elastic sealing plug, 202 - Air inlet hose, 203 - Magnet, 204 - Metal air outlet block, 205 - Through hole, 206 - Air inlet hole, 207 - Air outlet hole, 208 - Sleeve, 209 - Pull ring, 210 - Air inlet hard pipe, 211 - Elastic airtight gasket, 212 - Annular groove, 213 - Magnet block, 214 - Handle, 215 - Scale. Detailed implementation mode

[0042] The following will clearly and completely describe the technical solutions in the present invention in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0043] To facilitate those skilled in the art to more clearly understand the inventive concept of the present invention, before introducing the Mariotte bottle of the present invention, it is necessary to explain the Mariotte bottle in the prior art and the principle of regulating the water infiltration head carried out:

[0044] In the prior art, a water inlet is generally provided at the upper part of the bottle mouth of the Mariotte bottle to fill water into the Mariotte bottle; a fixed air hole and an air hole valve are provided on the side wall at the lower end of the bottle body to control the air pressure in the Mariotte bottle; a water outlet is also provided at the bottom of the bottle body.

[0045] Principle of regulating water infiltration head:

[0046] When the water in the Mariotte bottle and the surface water of the soil in the soil column are connected into a water supply system, based on the principle of water volume balance of the communicating vessel, theoretically, the position of the air hole in the Mariotte bottle is always flush with the surface water level of the soil. After starting to work, when the water in the soil column decreases slightly due to infiltration, the water in the Mariotte bottle flows into the soil column under the action of potential energy, so that the water in the soil column is stabilized at the original water level. Due to the infiltration of water in the soil column, the water level in the Mariotte bottle drops. At this time, the air pressure in the Mariotte bottle is smaller than the atmospheric pressure, and the outside air will enter the Mariotte bottle through the air hole on the side wall of the Mariotte bottle to increase the pressure in the Mariotte bottle to reach a new balance. When the water in the soil column continues to infiltrate, the balance process is the repetition of the above.

[0047] However, the above process is only an ideal infiltration process. In practice, when water flows out of the outlet of the Mariotte bottle through the hose, due to the existence of the head loss in the hose, that is, there is a head difference between the air hole of the Mariotte bottle and the water surface of the accumulated water on the soil surface. For example, if it is preset to carry out a water infiltration test under a head condition of 10 cm for the soil column, that is, the Mariotte bottle needs to provide a head of 10 cm to the soil column. However, due to the existence of the head loss, the final accumulated water depth in the soil column may only be 8 cm. At this time, in order to ensure that the soil column can normally carry out the water infiltration test under a head of 10 cm, only the height of the air hole can be raised to make a new imbalance between the air pressure in the Mariotte bottle and the outside. The water in the Mariotte bottle flows into the soil column, and finally the accumulated water depth in the soil column reaches 10 cm.

[0048] Currently, in the process of adjusting the head, mechanical lifting platforms or the method of padding something under the Mariotte bottle are often used. However, due to the large volume and weight of the Mariotte bottle filled with water, this mechanical adjustment method is very unsafe and time-consuming and laborious. For some factories or enterprises with large-capacity constant-pressure water supply requirements, it is difficult to adjust the height of the air hole of the Mariotte bottle.

[0049] In view of the technical problems of the present invention, the present invention provides a constant-pressure water supply device. Referring to Figure 1 , which shows a schematic structural diagram of a constant-pressure water supply device according to an embodiment of the present invention. The constant-pressure water supply device includes a square Mariotte bottle 1 and an air intake assembly 2; wherein:

[0050] A water storage chamber is arranged inside the square Mariotte bottle 1. An inlet 101 is arranged at the top end, and an outlet 102 is arranged at the lower end. The water storage chamber is respectively communicated with the inlet 101 and the outlet 102; the water storage chamber is used to supply water to devices such as the soil column through the outlet 102; the inlet 101 is arranged on the top surface of the square Mariotte bottle 1, and the diameter of the inlet 101 is slightly smaller than the diameter of the top surface, and is used to inject water into the water storage chamber to supplement the water in the water storage chamber.

[0051] The air intake assembly 2 includes: an elastic sealing plug 201, an air intake hose 202, a magnet 203, and a metal air outlet block 204 placed in the water storage chamber; one end of the elastic sealing plug 201 is inserted into the inlet 101 and has a radial pressure on the inlet 101, and the other end is provided with a through hole 205 penetrating through the elastic sealing plug 201; one end of the air intake hose 202 is provided with an air intake hole 206, and the other end passes through the through hole 205 and is placed in the water storage chamber; the magnet 203 faces the metal air outlet block 204 and is attached to the outer wall of the square Mariotte bottle 1 to generate an adsorption force on the metal air outlet block 204; the metal air outlet block 204 faces the magnet 203 and is adsorbed on the inner wall of the square Mariotte bottle 1. An air outlet hole 207 and a sleeve 208 are arranged on the metal air outlet block 204. The air outlet hole 207 is communicated with the sleeve 208, and the sleeve 208 is fixed and communicated with the air intake hose 202.

[0052] Through the arrangement of structures such as the elastic sealing plug 201, the intake hose 202, the magnet 203, and the metal air outlet block 204, the present invention realizes the sealing of the water inlet 101. At the same time, the user can drive the metal air outlet block 204 to move up and down along the inner wall of the square Mariotte bottle 1 by moving the magnet 203 up and down, so as to realize the adjustment of the water head height. Compared with the existing technology, there is no need to move the Mariotte bottle, the adjustment is more convenient, the adjustment accuracy is easier to control, and it is safe and efficient.

[0053] In an alternative embodiment of the present invention, the square Mariotte bottle 1 includes a Mariotte bottle lid 103 and a Mariotte bottle cavity 104. Referring to Fig. 2(a), a schematic structural diagram of the Mariotte bottle lid 103 according to an embodiment of the present invention is shown; referring to Fig. 2(b), a schematic structural diagram of the Mariotte bottle cavity 104 according to an embodiment of the present invention is shown. The water inlet 101 is arranged on the end face of the Mariotte bottle lid 103, and the water outlet 102 can be arranged on the lower side wall of the Mariotte bottle cavity 104. A ring of grooves 105 is arranged at the bottom end of the Mariotte bottle lid 103, and a ring of bosses 106 is arranged at the top end of the Mariotte bottle cavity 104. The bosses 106 and the grooves 105 cooperate with each other and are connected as a whole. Specifically, in implementation, the bosses 106 and the grooves 105 can be connected by threads or bonded by acrylic glue, glass glue, hot melt glue, etc. Preferably, hot melt glue is used for bonding, so that when cleaning the inside of the Mariotte bottle cavity 104 or replacing parts later, it is easier for the lid and the cavity to be separated, and it is not easy to damage the lid and the cavity. Among them, after threaded connection, glass glue or other such as acrylic glue, vaseline, etc. are used for sealing, so as to seal the connection between the Mariotte bottle lid 103 and the Mariotte bottle cavity 104. By designing the square Mariotte bottle 1 of the present invention as a structure in which the Mariotte bottle lid 103 and the Mariotte bottle cavity 104 can be assembled, it is beneficial to place and replace the metal air outlet block 204 and clean the Mariotte bottle. The design of the grooves 105 and the bosses 106 can make the connection between the Mariotte bottle lid 103 and the Mariotte bottle cavity 104 tighter, ensuring the airtightness of the whole device. It should be noted that the grooves 105 can also be arranged on the Mariotte bottle cavity 104, and the bosses 106 can also be arranged on the Mariotte bottle lid 103. The arrangement positions of the grooves 105 and the bosses 106 are not unique, as long as the Mariotte bottle lid 103 and the Mariotte bottle cavity 104 can be tightly combined. A scale 215 is arranged on the outer wall of the Mariotte bottle cavity 104, so as to facilitate observing the change of the water flow rate in the hollow chamber.

[0054] The square Mariotte bottle 1 of the present invention further includes a water outlet valve 107, and the water outlet valve 107 is installed at the water outlet 102; a leak-proof seal is arranged between the water outlet valve 107 and the water outlet 102. The leak-proof seal can adopt raw tape, silicone rubber ring, etc. Through the arrangement of the leak-proof seal, the tightness of the connection between the water outlet valve 107 and the water outlet 102 can be strengthened, avoiding water leakage and further causing water head loss. Refer toFigure 3 , showing a schematic structural view of the water outlet valve 107 according to an embodiment of the present invention.

[0055] Referring to Figure 4 , showing a schematic structural view of the elastic sealing plug 201 according to an embodiment of the present invention. The elastic sealing plug 201 is an elastic plug body, preferably made of rubber material, with a good balance between elasticity and hardness and is not easily damaged. The sealing plug is a frustum-shaped rubber plug, which can be applicable to water inlets 101 with different diameters and can ensure that the water inlet 101 is tightly plugged to achieve the sealing of the water inlet 101.

[0056] In an alternative embodiment of the present invention, an elastic airtight gasket 211 may further be provided between the elastic sealing plug 201 and the water inlet 101; a circular groove 212 is formed on the inner wall of the water inlet 101. The circular groove 212 is coaxial with the water inlet 101, and the elastic airtight gasket 211 is embedded in the circular groove 212. During the process of inserting the elastic sealing plug 201 into the water inlet 101, the elastic sealing plug 201 applies a radial extrusion force to the elastic airtight gasket 211, and the elastic airtight gasket 211 compresses and applies a rebounding force to the elastic sealing plug 201 to extrude the elastic sealing plug 201, thereby strengthening the sealing effect between the elastic sealing plug 201 and the water inlet 101. In Fig. 2(a), the structure of the water inlet 101 on the lid 103 of the Mariotte bottle and the formed circular groove 212 are shown; referring to Figure 5 , showing a schematic structural view of the elastic airtight gasket 211 according to an embodiment of the present invention.

[0057] A through hole 205 penetrating along the central axis of the elastic sealing plug 201 is formed on the elastic sealing plug 201. The through hole 205 is used for inserting the air inlet hose 202 into the water storage chamber of the square Mariotte bottle 1. Specifically, the diameter of the through hole 205 may be slightly smaller than the diameter of the air inlet hose 202, so as to form extrusion on the outer wall of the air inlet hose 202 to achieve the sealing between the outer wall of the air inlet hose 202 and the through hole 205, and achieve the purpose that the external atmosphere can only enter the water storage chamber through the air inlet hole 206 on the air inlet hose 202.

[0058] Of course, in actual implementation, the intake hose 202 may also be completely placed inside the water storage chamber. In an alternative embodiment of the present invention, the intake assembly 2 further includes a pull ring 209 and an intake hard pipe 210; one end of the intake hose 202 provided with an intake hole 206 is fixed to one end of the intake hard pipe 210, the other end of the intake hard pipe 210 is fixed to the outer wall of the pull ring 209, and the intake hole 206 is opened on the pull ring 209. During operation, the intake hard pipe 210 is placed inside the through hole 205 instead of the intake hose 202, and the intake hose 202 is completely placed inside the water storage chamber. The diameter of the intake hard pipe 210 is slightly larger than the diameter of the through hole 205, so that there is a radial pressure between the intake hard pipe 210 and the elastic sealing plug 201, thereby achieving the seal between the outer wall of the intake hard pipe 210 and the through hole 205. Compared with the method of inserting the intake hose 202 into the through hole 205, based on the characteristic that the intake hard pipe 210 is not easily deformed, the sealing effect of the present invention is better and the stability is high. In the present invention, the intake hose 202 or the intake hard pipe 210 is embedded on the elastic sealing plug 201. By removing the elastic sealing plug 201 from the water inlet 101, water can be injected into the square Marangoni flask 1, and by plugging the elastic sealing plug 201 into the water inlet 101, the seal of the water inlet 101 can be quickly achieved. This structure reduces the number of openings on the square Marangoni flask 1, making the entire device have the advantages of good structural stability and airtightness.

[0059] The pull ring 209 can be a solid pipe or a hollow pipe, and the present invention does not limit the shape of the pull ring 209. When the pull ring 209 is a solid pipe, the intake hole 206 is arranged at the connection between the pull ring 209 and the intake hard pipe 210 and communicates with the intake hard pipe 210; when the pull ring 209 is a hollow pipe, the pull ring 209 can be integrally formed with the intake hard pipe 210 and communicate with the intake hard pipe 210. At this time, the intake hole 206 can be arranged at any position of the pull ring 209. The setting of the pull ring 209 can hold the intake hard pipe 210 at the opening of the through hole 205 of the elastic sealing plug 201 to ensure that the intake hard pipe 210 does not fall into the water storage chamber. Referring to FIG. 6(a), a schematic structural diagram of the intake hard pipe 210 in an embodiment of the present invention is shown, and the intake hole 206 is arranged at the connection between the pull ring 209 and the intake hard pipe 210; referring to FIG. 6(b), a schematic structural diagram of the intake hose 202 in an embodiment of the present invention is shown, and the intake hose 202 and the intake hard pipe 210 can be connected by a threaded connection or a socket connection. After the two are connected by a threaded connection or a socket connection, hot melt adhesive can be used to further seal their connection to enhance airtightness.

[0060] Since the intake hose 202 can move freely under external force, in an alternative embodiment of the present invention, the length of the intake hose 202 is set to be greater than or equal to 1.5 times the height of the square Marangoni flask 1 to ensure that the intake hose 202 has the required turning length when removing the elastic sealing plug 201 when adding water to the square Marangoni flask 1.

[0061] Reference Figure 7 shows a schematic structural view of a metal air outlet block 204 according to an embodiment of the present invention. The metal air outlet block 204 can be set as a hemispherical shape or a square shape. Among them, the surface of the metal air outlet block 204 in contact with the inner wall of the square Mariotte bottle 1 is a flat surface, so that it can be better fitted with the inner wall of the square Mariotte bottle 1, increasing the magnetic contact surface with the magnet 203 and improving the stability. The air outlet holes 207 on the metal air outlet block 204 communicate with the sleeve 208 through the internal channels or cavities of the metal air outlet block 204, and the intake hose 202 communicates with the sleeve 208, so that the air outlet holes 207 communicate with the intake holes 206. The intake hose 202 can be fixed to the sleeve 208 by being inserted into the sleeve 208. The present invention adopts the setting of the sleeve 208, which is convenient for replacing the intake hose 202 and can also improve the connection stability between the intake hose 202 and the metal air outlet block 204. To ensure the accuracy of the air outlet position, after the intake hose 202 is inserted into the sleeve, hot melt adhesive or the like can be used to seal the connection between the two airtightly.

[0062] Reference Figure 8 shows a schematic structural view of a magnet 203 according to an embodiment of the present invention. The magnet 203 includes a magnet block 213 and a handle 214. The magnet block 213 can be made of a strong magnet. One end surface of the magnet block 213 is attached to the outer wall of the square Mariotte bottle 1, and the other end surface is fixed to the handle 214. The magnet 203 is used to drive the metal air outlet block 204 to move up and down along the inner wall of the square Mariotte bottle 1, thereby realizing the function of adjusting the water head. The setting of the handle 214 makes it more convenient to move the magnet block 213.

[0063] Next, the assembly steps of a constant pressure water supply device according to an embodiment of the present invention will be described:

[0064] The first step: Place the metal air outlet block 204 shown in Figure 7 inside the Mariotte bottle cavity 104 shown in Fig. 2(b). The flat surface of the metal air outlet block 204 is closely attached to the inner wall of the Mariotte bottle cavity 104. Then, align the magnet 203 shown in Figure 8 with the metal air outlet block 204 shown in Figure 7 , and tightly adsorb the two to both sides of the inner and outer walls of the Mariotte bottle cavity 104 through magnetic force.

[0065] The second step: Embed the elastic airtight gasket 211 shown in Figure 5 into the annular groove 212 in the middle of the Mariotte bottle lid 103 shown in Fig. 2(a). Then, insert the elastic sealing plug 201 shown in Figure 4 into the water inlet 101 in the middle of the Mariotte bottle lid 103 shown in Fig. 2(a).

[0066] The third step: Pass the intake hard pipe 210 shown in Fig. 6(a) through Figure 4The elastic sealing plug 201 shown is then connected to one end of the intake hose 202 shown in Fig. 6(b). The length of the intake hose 202 is more than 1.5 times the height of the Mariotte bottle, and the other end is connected to the sleeve 208 on the metal outlet block 204.

[0067] Step 4: Fit the groove 105 of the Mariotte bottle lid 103 shown in Fig. 2(a) with the boss 106 at the upper end of the Mariotte bottle cavity 104 shown in Fig. 2(b), and bond the interface with hot melt adhesive to make it airtight as a whole.

[0068] Step 5: Wrap the raw material tape around the water outlet valve 107 of Figure 3 and rotate it into the interface at the bottom end of the Mariotte bottle cavity 104 shown in Fig. 2(b). After the Mariotte bottle is assembled, the Figure 1 shown constant pressure water supply device is obtained.

[0069] Regarding the technical problems of the present invention, referring to Figure 9 , a step flowchart of the water head adjustment method according to an embodiment of the present invention is shown, which is applied to the constant pressure water supply device of the embodiment of the present invention. The method may include the following steps:

[0070] Step S901: Determine the target water level line on the square Mariotte bottle 1 according to the preset water head adjustment height.

[0071] Step S902: Move the magnet 203 along the axial direction of the square Mariotte bottle 1 so that the horizontal plane where the air outlet hole 207 of the metal outlet block 204 is located is flush with the target water level line.

[0072] The preset water head adjustment height may refer to the water head adjustment height determined after calculating the actual water head loss. Through the water head adjustment method of the present invention, while achieving the sealing of the water inlet 101, the user can drive the metal outlet block 204 to move up and down along the inner wall of the square Mariotte bottle 1 by moving the magnet 203 up and down, so as to achieve the adjustment of the water head height. Compared with the prior art, there is no need to move the Mariotte bottle, the adjustment convenience is higher, the adjustment accuracy is easier to control, and it is safe and efficient.

[0073] Next, the operation steps of the water head adjustment method of the present invention will be described in detail:

[0074] Step 1: Water addition operation. Close the water outlet valve 107, remove the elastic sealing plug 201 on the top of the Mariotte bottle body (the intake hard pipe 210 on the elastic sealing plug 201 does not need to be removed), and then add water to the required height (or fill it up) through the drainage pipe according to the test water volume requirement.

[0075] Step 2: Air tightness inspection. Open Figure 1The water outlet valve 107 at the bottom end of the Mariotte bottle body. When the following conditions are met: First, press the air inlet hole 206 at the pull ring 209 with your hand, and if no water flows out from the water outlet valve 107; Second, when you remove your finger, water flows out from the water outlet valve 107, it indicates that the airtightness of the Mariotte bottle is normal. At this time, close the water outlet valve 107.

[0076] Step 3: Water head adjustment: Move the Figure 8 magnet 203 shown up and down according to the water head height set in the experiment, and align the water outlet 102 of the Figure 7 metal air outlet block 204 shown with the outer wall scale 215 of the square Mariotte bottle 1 corresponding to the water head height preset in the experiment. The water head adjustment is completed.

[0077] Step 4: Constant pressure water supply. After the experiment starts, open the water outlet valve 107, and water flows from the water outlet 102 of the square Mariotte bottle 1 through the rubber hose to the receiving body (soil column or soil box). When the water level on the soil surface is flush with the air outlet hole 207, the self - water supply of the constant pressure water supply device of the present invention stops. When the water level on the soil surface is lower than the air outlet hole 207, the constant pressure water supply device of the present invention supplies water to the receiving body (such as a soil column) again, and finally achieves the purpose of constant pressure water supply.

[0078] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0079] The above provides a detailed introduction to a constant pressure water supply device and a water head adjustment method provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the structure and core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A constant pressure water supply device, characterized in that: The constant pressure water supply device comprises a square Malchnitz flask (1) and an air intake assembly (2); wherein: The square Malchow flask (1) is provided with a water storage chamber inside, a water inlet (101) is provided at the top, and a water outlet (102) is provided at the bottom, and the water storage chamber is connected to the water inlet (101) and the water outlet (102) respectively; The air intake assembly (2) comprises: an elastic sealing plug (201), an air intake hose (202), a magnet (203) and a metal air outlet block (204) placed in the water storage chamber; One end of the elastic sealing plug (201) is inserted into the water inlet (101) and exerts radial pressure on the water inlet (101), and the other end is provided with a through hole (205) penetrating the elastic sealing plug (201); One end of the air intake hose (202) is provided with an air intake hole (206), and the other end passes through the through hole (205) and is placed in the water storage chamber; The magnet (203) faces the metal gas outlet block (204) and is attached to the outer wall of the square Martens flask (1) to generate an adsorption force on the metal gas outlet block (204); The metal gas outlet block (204) faces the magnet (203) and is adsorbed on the inner wall of the square Martens flask (1). The metal gas outlet block (204) is provided with a gas outlet hole (207) and a sleeve (208). The gas outlet hole (207) is communicated with the sleeve (208). The sleeve (208) is fixed to and communicated with the gas inlet hose (202). The air intake assembly (2) further comprises a pull ring (209) and an air intake hard pipe (210); One end of the air intake hose (202) provided with an air intake hole (206) is fixed to one end of the air intake hard tube (210), and the other end of the air intake hard tube (210) is fixed to the outer wall of the pull ring (209), and the air intake hole (206) is opened on the pull ring (209); The magnet (203) comprises a magnet block (213) and a handle (214); one end surface of the magnet block (213) is in contact with the outer wall of the square Maltz flask (1), and the other end surface is fixed to the handle (214).

2. The constant pressure water supply equipment according to claim 1, characterized in that: An elastic airtight gasket (211) is also provided between the elastic sealing plug (201) and the water inlet (101); A circle of annular grooves (212) are also provided along the inner wall of the water inlet (101), the annular grooves (212) are coaxial with the water inlet (101), and the elastic airtight gasket (211) is embedded in the annular grooves (212).

3. The constant pressure water supply equipment according to claim 1, characterized in that: The square Martens flask (1) comprises a Martens flask cover (103) and a Martens flask cavity (104); The bottom end of the Malchnitz flask cover (103) is provided with a circle of grooves (105), and the top end of the Malchnitz flask cavity (104) is provided with a circle of bosses (106), and the bosses (106) and the grooves (105) cooperate with each other and are connected as a whole, so that the connection between the Malchnitz flask cover (103) and the Malchnitz flask cavity (104) is sealed.

4. The constant pressure water supply equipment according to claim 1, characterized in that: It also includes a water outlet valve (107), wherein the water outlet valve (107) is installed at the water outlet (102); A water-leakage-proof sealing member is provided between the water outlet valve (107) and the water outlet (102).

5. A water head adjustment method, characterized in that: Applied to the constant pressure water supply equipment according to any one of claims 1 to 4, the method comprises: According to a preset water head adjustment height, a target water level line is determined on the square Maltz flask (1); The magnet (203) is moved along the axial direction of the square Martens flask (1) so that the horizontal plane where the gas outlet hole (207) of the metal gas outlet block (204) is located is flush with the target water level line.

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