An assembleable high-sensitivity one-way valve without backflow pollution

Abstract

The utility model discloses an assembled non-reverse-flow pollution high-sensitivity one-way valve, comprising a valve body, a valve core, a conical spring, a valve bonnet, and a latch; the valve core is inserted into the central through hole of the valve body, and the inner surface of the valve body and the outer surface of the valve core can fit together; the conical spring is inserted into the valve core rod shaft, and then the valve bonnet is inserted into the valve core rod shaft, the conical spring is compressed, and then the latch is inserted into the latch hole set at the end of the rod shaft, so that the conical spring is initially kept in a compressed state, and opposite forces are applied to the valve body and the valve core respectively. When the medium pressure in the valve body is lower than a certain level, the valve body and the valve core always maintain a tightly fitting state, preventing the contaminated slurry from flowing back into the drill rod when the high-pressure rotary jet pile driver stops the high-pressure rotary jet. At the same time, the valve body liquid inlet end is provided with a thread, and the liquid outlet end column is provided with an inner hexagonal cavity, which can be directly tightened and installed on the drill rod liquid outlet by an inner hexagonal wrench. The valve body and the valve core are of assembled design, and the valve core can be directly pulled out, making it very easy to clean and maintain the one-way valve.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way valves used in high-pressure rotary jet pile drivers, in particular to an assembleable high-sensitivity one-way valve that does not cause backflow pollution. Background Art

[0002] At present, high-pressure jet grouting piles are widely used in the field of engineering construction. However, the one-way valves used in high-pressure jet grouting pile machines have problems such as insufficient sealing, poor stability, and difficult maintenance. The sealing performance of the one-way valve directly affects its effect in preventing the backflow of the medium. If the sealing surface is damaged or cement slurry is sandwiched, it may cause the contaminated slurry to flow back into the drill rod and block the drill rod, thereby affecting the normal operation of the high-pressure jet grouting pile machine. The one-way valve needs to withstand high pressure and impact in the high-pressure jet grouting pile machine, and it is very easy to get stuck, leak or be damaged; moreover, due to the complex construction environment of high-pressure jet grouting piles, the maintenance of existing one-way valves is often difficult to carry out, or requires a large investment of manpower and material costs, which greatly affects the construction quality and efficiency of the jet grouting piles. Summary of the invention

[0003] The utility model aims to provide an assemblable non-reverse flow pollution high-sensitivity one-way valve in view of the deficiencies of the prior art.

[0004] The utility model provides an assembled non-reverse flow pollution high-sensitivity one-way valve, comprising a valve body, a valve core, a conical spring, a valve cap, and a latch. The utility model is characterized in that the valve core is inserted into the valve body, the conical spring and the valve cap are sequentially inserted into the valve core rod shaft, the latch is inserted into the latch hole and abuts against the valve cap, the conical spring is initially kept in a compressed state, and exerts opposite forces on the valve body and the valve core respectively.

[0005] On the basis of the above, the inner surface of the valve body and the outer surface of the valve core can fit tightly under the initial pressure of the conical spring to maintain a normally closed state; or, under the action of a certain fluid pressure at the liquid inlet end, after offsetting the initial pressure of the conical spring, the outer surface of the valve core and the inner surface of the valve body can be separated to form a valve cavity, so that the fluid flows through the valve cavity to the liquid outlet end of the valve body.

[0006] On the basis of the above, the liquid inlet end of the valve body is provided with a thread, and the liquid outlet column is provided with a hexagonal cavity, which can be directly tightened and installed on the drill pipe outlet by a hexagonal wrench.

[0007] On the basis of the above, the conical spring has one end thicker and the other end thinner, the thick end abuts against the valve body, and the thin end abuts against the valve cap, the valve cap diameter is smaller than the diameter of the liquid inlet end of the valve body, and the conical spring and the valve cap will not affect the installation of the one-way valve.

[0008] Compared with the prior art, the utility model has the following beneficial effects:

[0009] The utility model provides an assembled non-reverse-flow pollution high-sensitivity one-way valve, which can keep the valve body and valve core in a tightly fitting state when the fluid pressure is lower than a certain level, so as to prevent the contaminated slurry from flowing back into the drill pipe when the high-pressure rotary jet pile driver stops high-pressure rotary jetting. At the same time, the valve body is provided with a thread at the liquid inlet end, and the inner body of the liquid outlet end is provided with a hexagonal cavity, which can be directly tightened and installed at the drill pipe outlet by a hexagonal wrench. The valve body and valve core are of assembled design, and the valve core can be directly pulled out, making it very easy to clean and maintain the one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0011] Figure 1 , Figure 2 This is a structural schematic diagram of an assembleable non-reverse flow pollution high-sensitivity one-way valve according to the utility model;

[0012] Figure 3 It is a structural schematic diagram of the valve core, conical spring, valve cap and latch of the one-way valve of the utility model;

[0013] Figure 4 , Figure 5 , Figure 6 This is a schematic structural diagram of the valve body of the one-way valve of the utility model;

[0014] Figure 7 , Figure 8 It is a structural cross-sectional view of the one-way valve of the utility model when it is in an open state;

[0015] Fig. 9 , Fig.10 It is a structural cross-sectional view of the one-way valve of the utility model when it is in a normally closed state;

[0016] Description of Figure Numbers:

[0017] Valve body 1 , valve core 2 , conical spring 3 , valve cap 4 , latch 5 , thread 101 , central through hole 102 , fluid through hole 103 , latch hole 201 .

[0018] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] The utility model provides an assembled non-reverse flow pollution high-sensitivity one-way valve, referring to Figure 1 , Figure 2 The utility model comprises a valve body 1, a valve core 2, a conical spring 3, a valve cap 4, and a latch 5. Figure 5 , 6 The surface of the cylinder at the liquid inlet end of the valve body 1 is provided with a thread 101, the cylinder at the liquid outlet end is provided with an inner hexagonal cavity, and the valve body 1 is provided with a central through hole 102 and 6 fluid through holes 103 in a ring shape surrounding the central through hole. Fig.10 The valve core 2 is provided with a pin hole 201.

[0022] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 The structure of the first embodiment of the present invention is as follows:

[0023] The stem of the valve core 2 passes through the central through hole 102 of the valve body 1;

[0024] The conical spring 3 is inserted into the rod shaft of the valve core 2 to form a concentric shaft shape;

[0025] The valve bonnet 3 is inserted into the stem of the valve core 2, and the conical spring 3 is squeezed so that the conical spring 3 is in a compressed state, and the two ends of the conical spring 3 are respectively against the valve body 1 and the valve bonnet 3;

[0026] Insert the latch pin 5 into the latch pin hole 201 provided at the end of the stem shaft of the valve core 2;

[0027] At this time, the valve body 1 is fixed, and the conical spring 3 exerts a rightward force on the valve core 2 by releasing the valve cap 4 and the latch 5, so that the outer wall of the valve core 2 fits tightly with the inner wall of the valve body 1, thereby making the entire one-way valve present a normally closed state.

[0028] Reference Figure 7 , Figure 8 , Fig. 9 , Fig.10 The implementation steps of the first embodiment of the present invention are as follows:

[0029] After the one-way valve is assembled according to the structure of the first embodiment, the one-way valve is tightened onto the drill pipe through the thread 101 at the liquid inlet end of the valve body 1 and the hexagon socket at the liquid outlet end of the valve body 1.

[0030] Before starting the high-pressure jet pile driver, no liquid passes through the fluid through hole 103 on the valve body 1, and no liquid pressure acts on the valve core 2. At this time, the valve core 2 is only subjected to the rightward thrust N of the conical spring 3, and the one-way valve is as follows: Fig. 9 , Fig.10 Shown in closed position.

[0031] After the high-pressure jet pile driver is started, high-pressure liquid enters the fluid through hole 103 on the valve body 1 and applies a leftward liquid pressure F to the tapered side wall of the valve core 2. When F is greater than N, the valve core 2 moves to the left, and the tapered side wall of the valve core 2 and the side wall of the valve body 1 directly form a cavity (such as Figure 5 , Figure 8 As shown in the figure, high-pressure liquid enters the cavity through the fluid through hole 103 and is ejected from the liquid outlet of the valve body 1. The greater the pressure of the high-pressure liquid, the greater the liquid pressure F, the larger the cavity volume, and the greater the flow rate at the liquid outlet of the valve body 1. When the liquid outlet of the valve body 1 is filled with high-pressure liquid, a rightward liquid pressure T is applied to the valve core 2, and the thrust N of the spring 3 increases to N1. When the liquid pressure F reaches a certain level, the valve core 2 is in a balanced force state (F=N1+T), and the cavity between the valve body 1 and the valve core 2 is constant.

[0032] After the high-pressure rotary jet pile driver is paused, the pressure F of the high-pressure liquid flowing into the fluid through hole drops sharply. At this time, F is much smaller than N1+T. The valve core 2 moves rapidly to the right under the action of the rightward thrust. The conical side wall of the valve core 2 fits tightly with the side wall of the valve body 1 again, and the one-way valve returns to the closed state, which quickly prevents the contaminated liquid formed by the mixture of cement soil and high-pressure liquid from flowing back from the liquid outlet of the valve body 1 into the inside of the drill pipe.

[0033] After the high-pressure jet grouting machine is stopped, the one-way valve can be disassembled in reverse according to the structural assembly method of the first embodiment, and the one-way valve can be cleaned and maintained.

[0034] According to different use requirements of the project, conical springs 3 with different stiffness coefficients can be installed. Under the same initial compression state, different initial thrusts N can be provided. Accordingly, the one-way valve can be pushed open under different initial fluid pressures, and the fluid can flow in one direction in the one-way valve.

Claims

1. An assembleable non-reverse flow pollution high-sensitivity one-way valve, characterized in that: It includes a valve body, a valve core, a conical spring, a valve bonnet and a latch. The valve core is inserted into the valve body, the conical spring and the valve bonnet are sequentially inserted into the valve core stem shaft, the latch is inserted into the latch hole and pressed against the valve bonnet, and the conical spring initially maintains a compressed state, exerting opposite forces on the valve body and the valve core respectively.

2. The assemblable non-reverse flow pollution high-sensitivity one-way valve according to claim 1, characterized in that: The inner surface of the valve body and the outer surface of the valve core can fit tightly under the initial pressure of the conical spring to maintain a normally closed state; or, under the action of a certain fluid pressure at the liquid inlet end, the initial pressure of the conical spring can be offset, so that the outer surface of the valve core and the inner surface of the valve body can be separated to form a valve cavity, allowing the fluid to flow through the valve cavity to the liquid outlet end of the valve body.

3. The assemblable non-reverse flow pollution high-sensitivity one-way valve according to claim 1, characterized in that: The liquid inlet end of the valve body is provided with a thread, and the liquid outlet column is provided with an inner hexagonal cavity, which can be directly tightened and installed on the drill pipe outlet by an inner hexagonal wrench.

4. The assemblable non-reverse flow pollution high-sensitivity one-way valve according to claim 1, characterized in that: One end of the conical spring is thick and the other end is thin. The thick end abuts against the valve body and the thin end abuts against the valve bonnet. The diameter of the valve bonnet is smaller than the diameter of the liquid inlet end of the valve body. The conical spring and the valve bonnet will not affect the installation of the one-way valve.

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