Double-seal wear-resistant fixed ball valve

Abstract

The application discloses a soft and hard double sealing wear-resistant fixed ball valve, which comprises a valve body internally provided with a valve cavity, a valve cover arranged on the valve body, and a valve rod penetrating through the valve cover and connected with a ball arranged in the valve body, wherein a soft and hard sealing seat in sealing cooperation with the ball is arranged in the valve body, and a cleaning assembly for cleaning the valve cavity is further arranged on the valve body. The soft and hard sealing seat is arranged to seal the ball in a soft and hard combined manner, so that the sealing effect is not rapidly reduced due to the erosion of particles contained in liquid to the soft seal. The cleaning assembly is arranged to clean the valve cavity when the ball valve is in a closed state, so as to remove the particles attached to the surface of the ball, especially the sealing surface, and discharge the liquid containing the particles to the outside of the valve body, thereby reducing the probability of solid particles entering between the ball and the soft and hard sealing seat, improving the wear resistance of the ball, ensuring the sealing property, and prolonging the service life of the ball valve.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ball valves, and more particularly to a soft and hard double sealing wear-resistant fixed ball valve. BACKGROUND

[0002] The fixed ball valve is generally composed of a valve body, a valve seat, a valve cover, a valve rod, and a ball. The lower end of the valve rod is fixedly connected with the ball. An ear shaft is fixedly connected with the ball at the other end of the connection between the ball and the valve rod. The ear shaft is movably connected with the valve body. The valve seat adopts a floating structure. The main disadvantage of the existing fixed ball valve is that the particulate impurities deposited in the valve cavity cannot be smoothly discharged from the outlet, which hinders the rotation of the ball and causes wear on the sealing surface of the ball. After the surface of the ball is worn, the sealing effect is poor, and leakage and other problems are prone to occur, which shortens the service life of the fixed ball valve. Therefore, it is necessary to propose a soft and hard double sealing wear-resistant fixed ball valve to at least partially solve the problems existing in the prior art. SUMMARY

[0003] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the detailed description section. The summary section of the present application does not mean to attempt to limit the key features and necessary technical features of the claimed technical solution, nor to determine the protection scope of the claimed technical solution.

[0004] To at least partially solve the above problems, the present application provides a soft and hard double sealing wear-resistant fixed ball valve, which comprises a valve body provided with a valve cavity, a valve cover provided on the valve body, and a valve rod penetrating through the valve cover and connected with a ball provided in the valve body. The valve body is provided with a soft and hard sealing seat in sealing cooperation with the ball. The valve body is further provided with a cleaning assembly for cleaning the valve cavity.

[0005] Preferably, the soft and hard sealing seat is arranged at the inlet of the valve cavity, and the soft sealing seat is arranged at the outlet of the valve cavity.

[0006] Preferably, a slot hole is arranged at the inlet of the valve cavity for mounting the soft and hard sealing seat. The soft and hard sealing seat is in sealing sliding connection with the slot hole.

[0007] Preferably, the slot hole comprises a first circular hole, a second circular hole, and a tapered hole arranged in sequence. The tapered hole is arranged away from the valve cavity.

[0008] The diameter of the first circular hole is greater than that of the second circular hole. The diameter of one end of the tapered hole connected with the second circular hole is greater than that of the other end.

[0009] The soft and hard sealing seat comprises a limiting ring sealingly connected in the first circular hole, a sliding ring slidingly arranged in the second circular hole and a driving ring; the driving ring is provided with a mounting groove, the inner ring wall of the mounting groove extends to contact the inner ring surface of the sliding ring, and the bottom surface of the mounting groove is connected with the sliding ring through a spring; the end of the sliding ring away from the driving ring is slidingly limited in the first circular hole, and the end of the sliding ring is provided with an annular notch, and the annular notch is provided with a soft and hard sealing element sealingly contacting the ball.

[0010] Preferably, the soft and hard sealing element comprises an elastic plate arranged at the bottom of the annular notch, and an outer sealing ring, a soft sealing ring and an inner sealing ring sequentially sleeved, the outer ring surface and the inner ring surface of the annular notch are both provided with a limiting groove, the outer sealing ring and the inner sealing ring are both provided with a sliding block slidingly connected in the limiting groove, the cross section of the elastic plate is arc-shaped, and the elastic plate elastically abuts against the outer sealing ring, the inner sealing ring and the soft sealing ring respectively, and the abutting positions of the outer sealing ring, the inner sealing ring and the elastic plate are all bevels.

[0011] Preferably, the cleaning assembly comprises a blowdown valve arranged at the blowdown port of the valve body and a particle removal assembly arranged at the side of the valve body, and the particle removal assembly is used for performing particle removal work on the valve cavity of the valve body according to the particles contained in the liquid discharged from the blowdown port.

[0012] Preferably, the blowdown valve is connected with a blowdown pipe, the blowdown pipe is provided with a detection assembly for detecting the particle content in the discharged liquid, and the particle removal assembly performs cleaning work according to the detection result of the detection assembly.

[0013] Preferably, at least four through holes are arranged on the side wall of the valve cavity and correspond to the particle removal assembly;

[0014] The particle removal assembly comprises a shell sealingly connected with the valve body, the shell is provided with a cleaning nozzle, one end of the cleaning nozzle is arranged in the through hole through a sealing opening and closing element, the other end of the cleaning nozzle is connected with a liquid inlet pipe, and the side of the cleaning nozzle is connected with an air inlet pipe.

[0015] Preferably, the sealing opening and closing element comprises a fixed part and an opening and closing part, the end of the through hole close to the outside of the valve body is provided with a mounting hole for sealingly mounting the fixed part, and the opening and closing part is arranged at one end of the fixed part and arranged inside the through hole.

[0016] One end of the cleaning nozzle is sleeved on the inside of the fixed part.

[0017] The opening and closing part comprises at least four elastic sealing sheets connected with the fixed part, the elastic sealing sheets are used for isolating the cleaning nozzle from the through hole when the elastic sealing sheets are close to each other, and the elastic sealing sheets are used for connecting the cleaning nozzle with the through hole when the elastic sealing sheets are separated from each other.

[0018] Preferably, the cleaning nozzle includes: an inner cylinder, one end of which is connected to an inlet pipe, and the other end of which is provided with a first cone. A second cone is provided inside the first cone. A guide post protruding from the first cone is provided at the end of the second cone away from the inner cylinder. A plurality of first diversion grooves are evenly arranged on the surface of the first cone along its circumference. A plurality of second diversion grooves are evenly arranged on the surface of the second cone along its circumference. A spiral groove corresponding to the first and second diversion grooves is provided on the outer circumferential surface of the guide post. An outer cylinder is sleeved on the outside of the inner cylinder. The end of the outer cylinder away from the first cone is sealed to the inner cylinder, and the other end is sleeved on the outer surface of the first cone and the outer circumferential surface of the guide post, so that an air intake channel communicating with the air intake pipe is formed between the inner cylinder and the outer cylinder.

[0019] The second cone has a liquid passage hole that passes through it and the guide column on its axis. The diameter of the first cone near the inner cylinder is larger than the diameter of its other end. The diameter of the second cone connected to the guide column is larger than the diameter of its other end. A first diversion channel is formed between the first diversion groove and the outer cylinder. A second diversion channel is formed between the second diversion groove and the inner cylinder. A guide channel is formed between the outer cylinder and the spiral groove.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] The wear-resistant fixed ball valve with dual soft and hard sealing described in this invention uses a combination of soft and hard sealing seats to seal the ball, preventing particles in the liquid from corroding the soft seal and quickly reducing the sealing effect. The cleaning component cleans the valve cavity when the ball valve is closed to remove particles attached to the ball surface, especially at the sealing surface, and discharges liquid containing particles to the outside of the valve body. This reduces the probability of solid particles entering between the ball and the soft and hard sealing seats, thereby improving the wear resistance of the ball, ensuring its sealing performance, and extending the service life of the ball valve.

[0022] The soft and hard dual-seal wear-resistant fixed ball valve of the present invention, other advantages, objectives and features of the present invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of the invention. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the internal structure of the wear-resistant fixed ball valve with both soft and hard sealing as described in this invention.

[0025] Figure 2 Structure diagram of the soft and hard double sealing wear-resistant fixed ball valve of the present application Figure 1 Enlarged structure diagram of A in the above figure;

[0026] Figure 3 Structure diagram of the blowdown port in the soft and hard double sealing wear-resistant fixed ball valve of the present application

[0027] Figure 4 Structure diagram of the soft and hard double sealing wear-resistant fixed ball valve of the present application in the closed state;

[0028] Figure 5 Structure diagram of the soft and hard double sealing wear-resistant fixed ball valve of the present application in the process of opening from the closed state to the open state;

[0029] Figure 6 Position diagram of the through hole in the soft and hard double sealing wear-resistant fixed ball valve of the present application

[0030] Figure 7 Structure diagram of the particle removal assembly in the soft and hard double sealing wear-resistant fixed ball valve of the present application

[0031] Figure 8 Structure diagram of the soft and hard double sealing wear-resistant fixed ball valve of the present application Figure 7 Enlarged structure diagram of B in the above figure;

[0032] Figure 9 Structure diagram of the soft and hard double sealing wear-resistant fixed ball valve of the present application in the process of opening the sealing opening and closing member

[0033] Figure 10 End structure diagram of the cleaning nozzle in the soft and hard double sealing wear-resistant fixed ball valve of the present application

[0034] Figure 11 Internal structure diagram of the cleaning nozzle in the soft and hard double sealing wear-resistant fixed ball valve of the present application

[0035] Figure 12 Structure diagram of the second cone and the guide column in the soft and hard double sealing wear-resistant fixed ball valve of the present application DETAILED DESCRIPTION

[0036] The present application will be further described in detail below with reference to the accompanying drawings and examples, so that those skilled in the art can implement the present application according to the description.

[0037] It should be understood that the terms such as "have", "contain" and "include" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0038] AsFigures 1-12 As shown, the present application provides a soft and hard double sealing wear-resistant fixed ball valve, comprising: a valve body 1 internally provided with a valve cavity 6, a valve cover 2 provided on the valve body 1, a valve rod 4 penetrating through the valve cover 2 and connected with a ball 3 provided in the valve body 1, the valve body 1 is internally provided with a soft and hard sealing seat 5 in sealing cooperation with the ball 3, and the valve body 1 is further provided with a cleaning assembly 7 for cleaning the valve cavity 6.

[0039] The working principle and beneficial effects of the above technical solution are as follows: the ball 3 is arranged inside the valve cavity 6, and the ball 3 is floatingly sealed with the liquid inlet of the valve body 1 through the arranged soft and hard sealing seat 5, the soft and hard sealing seat 5 can be arranged only at the liquid inlet of the valve body 1, and the soft and hard sealing seat 5 can be sealed and connected with the ball 3 by relying on the pressure of the liquid in the liquid inlet channel, so as to prevent the liquid from entering the valve cavity 6 from the liquid inlet channel, and the liquid outlet of the valve body 1 can be selectively provided with a sealing seat, so that the rotating resistance of the wrench arranged at the top end of the valve rod 4 can be reduced;

[0040] The arranged soft and hard sealing seat 5 seals the ball 3 by combining soft and hard, so as to prevent the particles contained in the liquid from eroding the soft seal and reducing the sealing effect;

[0041] The valve body 1 is further provided with a cleaning assembly 7 for cleaning the valve cavity 6, after the ball 3 rotates to close the liquid inlet channel of the valve body 1, liquid will remain in the valve cavity 6, if the liquid contains solid particles, the particles will adhere to the surface of the ball 3, especially the sealing surface of the ball 3 in contact with the soft and hard sealing seat 5, if the particles adhere to the surface, the rotation of the ball 3 will be hindered, and the particles may be between the soft and hard sealing seat 5 and the ball 3 during rotation, which will cause wear of the ball 3 and reduce the sealing effect, therefore, in order to reduce the wear, the cleaning assembly 7 is arranged, which mainly cleans the valve cavity 6 when the ball valve is in a closed state, to remove the particles adhered to the surface of the ball 3, especially the sealing surface, and discharge the liquid containing particles outside the valve body 1, in this way, when the ball valve is opened again, the rotation of the ball 3 is not affected by the particles adhered to the surface, the probability of solid particles entering between the ball 3 and the soft and hard sealing seat 5 is reduced, the wear resistance of the ball 3 is improved, the sealing property is ensured, and the service life of the ball valve is improved.

[0042] In one embodiment, the liquid inlet of the valve cavity 6 is provided with a soft and hard sealing seat 5, and the liquid outlet of the valve cavity 6 is provided with a soft sealing seat 10.

[0043] The working principle and beneficial effects of the above technical solution are as follows: Different from the previous embodiment, the soft sealing seat 10 is arranged at the liquid outlet of the valve cavity, and the soft sealing seat 10 is a valve seat commonly used in the prior art. Here, the balance of the force acting on the ball 3 is mainly considered. Since the liquid flows from the liquid inlet to the liquid outlet, an impact force is generated on the ball 3. Therefore, in order to ensure that the ball 3 at the liquid outlet can be supported, the soft sealing seat 10 is arranged, which mainly supports the ball 3 and ensures the balance of the force acting on the ball 3.

[0044] In one embodiment, a slot hole 8 for mounting the soft and hard sealing seat 5 is arranged at the liquid inlet of the valve cavity 6, and the soft and hard sealing seat 5 is in sealing and sliding connection with the slot hole 8.

[0045] The working principle and beneficial effects of the above technical solution are as follows: The soft and hard sealing seat 5 is a floating valve seat, and the slot hole 8 is arranged at the liquid inlet of the valve cavity 6, that is, near the liquid inlet channel of the valve cavity 6, for mounting the soft and hard sealing seat 5.

[0046] In one embodiment, the slot hole 8 comprises a first circular hole 810, a second circular hole 820 and a tapered hole 830 arranged in sequence, and the tapered hole 830 is arranged away from the valve cavity 6.

[0047] The diameter of the first circular hole 810 is greater than the diameter of the second circular hole 820, and the diameter of one end of the tapered hole 830 connected with the second circular hole 820 is greater than the diameter of the other end.

[0048] The soft and hard sealing seat 5 comprises a limiting ring 510 sealingly connected in the first circular hole 810, a sliding ring 520 sealingly and slidingly arranged in the second circular hole 820 and a driving ring 530, wherein the driving ring 530 is provided with a mounting groove, the inner ring wall of the mounting groove extends to be in contact with the inner ring surface of the sliding ring 520, and a spring 540 is connected between the bottom surface of the mounting groove and the sliding ring 520. One end of the sliding ring 520 away from the driving ring 530 is slidingly limited in the first circular hole 810, and the end of the sliding ring 520 is provided with an annular notch 521, and the annular notch 521 is provided with a soft and hard sealing element 550 in sealing contact with the ball 3.

[0049] The working principle and beneficial effects of the above technical solution are as follows: The cross section of the limiting ring 510 is L-shaped, the outer ring of the limiting ring 510 is sealingly and fixedly connected with the first circular hole 810 through a screw and a sealing ring, and the inner ring of the limiting ring 510 is used for limiting the sliding of the sliding ring 520. The outer side wall of the sliding ring 520 sliding in the second circular hole 820 is provided with a sealing ring, and the outer side wall of the sliding ring 520 in contact with the inner ring wall of the mounting groove is provided with a sealing ring, so that the sliding ring 520 can sealingly slide.

[0050] The principle of the soft and hard sealing seat 5 sealing the ball 3 is as follows: Figure 2As shown, liquid flows from left to right, and part of the liquid enters the tapered hole 830, thereby forming pressure on the end face of the driving ring 530 close to the tapered hole 830, pushing the driving ring 530 to move to the right, thereby compressing the spring 540, and the spring 540 generates elastic force to push the sliding ring 520 to move to the right, thereby pushing the soft and hard sealing element 550 in the annular notch 521 to move to the right, forming elastic abutting force on the ball 3, and increasing the sealing performance of the ball 3.

[0051] In one embodiment, the soft and hard sealing element 550 comprises: an elastic plate 551 arranged at the bottom of the annular notch 521, and an outer sealing ring 552, a soft sealing ring 553 and an inner sealing ring 554 successively sleeved, the outer ring surface and the inner ring surface of the annular notch 521 are each provided with a limiting groove 555, the outer sealing ring 552 and the inner sealing ring 554 are each provided with a sliding block 556 slidingly connected in the limiting groove 555, the cross section of the elastic plate 551 is arc-shaped, and the elastic plate 551 is in elastic abutment with the outer sealing ring 552, the inner sealing ring 554 and the soft sealing ring 553 respectively, and the abutment positions of the outer sealing ring 552 and the inner sealing ring 554 with the elastic plate 551 are bevels.

[0052] The working principle and beneficial effects of the above technical solution are as follows: in the embodiment, the limiting groove 555 is arranged at the end of the annular notch 521 away from the ball 3, and provides sliding limitation for the sliding block 556, thereby limiting the outer sealing ring 552 and the inner sealing ring 554 from sliding out, and similarly, a sliding groove for limiting the movement of the soft sealing ring 553 can be arranged on the corresponding ring surface of the outer sealing ring 552 and the inner sealing ring 554, and a limiting block slidingly arranged in the sliding groove can be arranged on the inner and outer ring surfaces of the soft sealing ring 553.

[0053] The elastic plate 551 is movably arranged in the annular notch 521, the cross section of the elastic plate 551 is arc-shaped, the elastic plate 551 can be made of a metal elastic sheet, the arc-shaped surfaces protruding from the elastic plate 551 are in abutment with the bevels on the opposite end portions of the outer sealing ring 552 and the inner sealing ring 554 respectively, and the middle position of the arc-shaped surfaces protruding from the elastic plate 551 is in abutment with the soft sealing ring 553, the soft sealing ring 553 is made of a soft sealing material commonly used in the prior art, the outer sealing ring 552 and the inner sealing ring 554 are made of a hard sealing material commonly used in the prior art, and the soft sealing ring 553 is movable relative to the outer sealing ring 552 and the inner sealing ring 554.

[0054] The outer sealing ring 552 and the inner sealing ring 554 sandwich the soft sealing ring 553, and the three are in sealing abutment with the ball 3, so that no matter from which direction the liquid hits the soft and hard sealing element 550, the soft sealing ring 553 will not be eroded under the protection of the hard outer sealing ring 552 and the inner sealing ring 554, thereby reducing the damage to the soft sealing ring 553 caused by the impact of solid particles, and further ensuring the sealing effect.

[0055] And, in the sealing process, through the action of the elastic plate 551, the outer sealing ring 552, the inner sealing ring 554 and the soft sealing ring 553 can play a better sealing effect, for example, when the ball 3 generates abutting force on the outer sealing ring 552 and the inner sealing ring 554, the inclined surfaces of the inner and outer sealing rings simultaneously extrude the elastic plate 551, so that the elastic plate 551 arches to form an outward elastic pushing force on the soft sealing ring 553, thereby increasing the abutting force of the soft sealing ring 553 and the ball 3, and improving the sealing effect; if the abutting force of the ball 3 on the soft sealing ring 553 is larger, the soft sealing ring 553 will also generate abutting force on the elastic plate 551, driving the arc-shaped two sides of the elastic plate 551 to open outward, thereby pushing the inner and outer sealing rings outward, increasing the abutting force of the inner and outer sealing rings and the ball 3, ensuring the effective sealing of the soft and hard sealing element 550, reducing the possibility of solid particles entering between the ball 3 and the soft and hard sealing element 550, and further reducing the wear of the ball 3 by solid particles;

[0056] In particular, when the ball 3 produces irregular micro-displacement due to vibration or other factors, the abutting force between the sealing surface of the ball 3 and the soft and hard sealing element 550 is unbalanced, and as long as a larger extrusion force is generated on any one of the outer sealing ring 552, the inner sealing ring 554 and the soft sealing ring 553, the elastic plate 551 will deform, and the deformed elastic plate 551 will simultaneously generate an outward pushing force on the other two sealing rings, thereby enabling the three sealing rings to maintain constant sealing abutting force on the ball 3, ensuring the sealing effect.

[0057] In one embodiment, the cleaning assembly 7 includes a blowdown port 710 arranged at the bottom of the valve body 1 and a particle removal assembly 9 arranged at the side of the valve body 1, and the blowdown port 710 is provided with a blowdown valve 11, and the particle removal assembly 9 is used for particle removal work on the valve cavity 6 of the valve body 1 according to the particles contained in the liquid discharged from the blowdown port 710.

[0058] The working principle and beneficial effects of the above technical solution are as follows: the particle removal assembly 9 is used to provide a cleaning gas flow, or a liquid flow, or other forms of removal fluid to the valve cavity 6 of the valve body 1, to form a flushing on the surface of the ball 3 and the valve cavity 6, so that the adhered particles are removed and flow to the blowdown port 710 arranged at the bottom of the valve body 1 under the action of gravity; when the particle removal assembly 9 is working, the blowdown valve 11 is opened at the same time, so that the flushed liquid or particles can be smoothly discharged to the outside of the valve cavity 6;

[0059] Further comprising: a control unit for controlling the cooperation of the particle removal assembly 9 and the blowdown valve 11, and detecting the discharged particles until the discharged particles reach the detection standard, then the particle removal assembly 9 can be controlled to stop working, and the blowdown valve 11 is closed;

[0060] The control unit can be selectively automatically opened when the ball valve is in the closed state, so as to ensure that there is no particle attached to the surface of the valve cavity 6 and the ball 3 when the ball valve is opened next time, and the internal wear of the ball valve is reduced.

[0061] In an embodiment, the blowdown valve 11 is connected with a blowdown pipe, and a detection assembly for detecting the particle content in the discharged liquid is arranged on the blowdown pipe, and the particle removal assembly 9 performs cleaning work according to the detection result of the detection assembly.

[0062] The working principle and beneficial effects of the above technical solution are as follows: in the embodiment, the solid particle content in the discharged liquid is detected, and the detection assembly is arranged, and when the detection result of the detection assembly reaches the standard, the particle removal assembly 9 can be controlled to stop working, and after the liquid in the valve cavity 6 is completely discharged, the blowdown valve 11 can be controlled to be closed.

[0063] Further, after the blowdown valve 11 completely discharges the flushing liquid, the particle removal assembly 9 can be used to fill the valve cavity 6 with liquid without solid particles, such as water, and then the blowdown valve 11 is closed, so as to form a pressure maintaining effect on the valve cavity 6, and further ensure that the liquid force at the liquid inlet channel of the valve cavity 6 reaches a balance, and the lateral force of the liquid at the liquid inlet channel on the ball 3 is reduced.

[0064] In an embodiment, at least four through holes 610 are arranged on the side wall of the valve cavity 6 corresponding to the particle removal assembly 9.

[0065] The particle removal assembly 9 comprises a shell 910 sealingly connected with the valve body 1, a cleaning nozzle 920 arranged in the shell 910, one end of the cleaning nozzle 920 being arranged in the through hole 610 through a sealing opening and closing piece 930, the other end of the cleaning nozzle 920 being communicated with a liquid inlet pipe 940, and the side of the cleaning nozzle 920 being communicated with an air inlet pipe 950.

[0066] The working principle and beneficial effects of the above technical solution are as follows: the arrangement of the through hole 610 is to enable a part of the cleaning fluid to flow from the front side of the ball 3, pass above the ball 3 and flow down from the back side of the ball 3 to the blowdown port 710, and a part of the cleaning fluid can flow from the front side of the ball 3 below and flow to the blowdown port 710, so as to maximize the contact area with the ball 3, as shown in the figure, especially the effective flushing of the sealing surface; therefore, the through hole 610 can be adaptively arranged to be inclined to meet the above requirements. Figure 5 ​

[0067] The particle removing assembly 9 comprises a housing 910 for sealingly mounting with the valve body 1, and the remaining components can be arranged inside the housing 910. In order to prevent the particles in the liquid in the valve cavity 6 from blocking the cleaning nozzle 920 when the cleaning nozzle 920 is arranged in the through hole 610, especially when the ball valve is opened and closed, a sealing opening and closing member 930 is arranged at the front end of the cleaning nozzle 920. When the cleaning nozzle 920 is not working, the sealing opening and closing member 930 is in a closed state to prevent the particles from blocking the cleaning nozzle 920. When the cleaning nozzle 920 is working, the air pressure or liquid pressure generated by the cleaning nozzle 920 can automatically open the sealing opening and closing member 930 to realize the function of automatic opening and closing sealing;

[0068] The liquid inlet pipe 940 is connected with a liquid storage tank through the first valve and the water pump, and the air inlet pipe 950 is connected with an air storage chamber through the second valve and the air charging pump. The air inlet pipe 950 is directly connected with the air charging pump through the second valve to take air as the air source. The first valve, the water pump, the second valve and the air charging pump are electrically connected with the control unit and controlled by the control unit. The liquid and the gas can be introduced into the cleaning nozzle 920 through the liquid inlet pipe 940 and the air inlet pipe 950 to form cleaning fluid, or the liquid or the gas can be introduced alone to form liquid flow or gas flow;

[0069] In the embodiment, a cleaning method is also provided. During cleaning, the control unit can first control the first valve and the water pump, the second valve and the air charging pump to work to perform first cleaning. The liquid can be water without solid particles, and the gas can be air without solid particles to provide cleaning water mist to the cleaning nozzle 920. The water mist is sprayed at a certain pressure after passing through the cleaning nozzle 920 to clean the stubborn particles attached to the ball 3 and the valve cavity 6. After the first cleaning is completed within a preset time, the control unit controls the first valve and the water pump to stop working, and controls the second valve and the air charging pump to work to perform second cleaning. Only the gas is provided to the cleaning nozzle 920, and the gas is sprayed at a certain pressure after passing through the cleaning nozzle 920 to clean the particles attached to the ball 3 and the valve cavity 6. After the second cleaning is completed within a preset time, the control unit controls the first valve and the water pump to work and controls the second valve and the air charging pump to stop working to perform third cleaning. Only the liquid is provided to the cleaning nozzle 920, and the valve cavity 6 is filled with clean liquid. The liquid carries away the remaining particles and is discharged from the drain 710. At the same time, the detection assembly detects the content of the particles in the discharged liquid. When the detection result meets the detection standard, the control unit controls the first valve and the water pump to stop working and controls the drain valve 11 to be closed, thereby completing the cleaning;

[0070] That is, the first time the use of a larger jet pressure cleaning water mist to stubborn particles for cleaning, due to the jet pressure is also larger will cause damage to the ball 3, therefore, not suitable for long time use, so in the preset time is completed, and only by using the airflow for cleaning, can be through the airflow has loosened again stubborn particles flush, airflow compared to the pressure of the water mist will be small, the damage to the ball 3 is small, finally, only by liquid will all the remaining particles removed from the sewage outlet 710, so you can achieve better and more effective cleaning, and prevent the cleaning damage to the ball 3, further prevent its wear, improve the service life.

[0071] In one embodiment, the part of the sewage pipe provided with the detection assembly is transparent, and the detection assembly detects the content of particles in the liquid flowing through the sewage pipe by using a light blocking method.

[0072]

[0073] Wherein, D is the diameter of the solid particles, v is the flow rate of the liquid, f is the time domain integral of the pulse signal, w is the width of the laser beam, V1 is the voltage generated when the liquid containing solid particles passes through the detection assembly, V is the voltage generated when the liquid without solid particles passes through the detection assembly, and π is a mathematical constant.

[0074] Meanwhile, the abnormal result removal module is used to generate a voltage-time relationship curve during the detection of whether solid particles pass through the detection area of the detection assembly, compare the relationship curve with a standard curve during the passage of solid particles through the detection area, and if there is a difference between the relationship curve and the standard curve, the detected result is non-solid particles, and the detection result is removed.

[0075] The working principle and beneficial effects of the above technical solution are as follows: the detection assembly includes a laser emitter arranged on one side of the detection area of the sewage pipe and a photoreceptor, i.e., a photodiode, arranged on the other side. The uniform parallel light beam emitted by the laser emitter passes through the detection area and is received by the photoreceptor. When the detection area of the sewage pipe has no solid particles passing through, the light beam can reach the light receiving target surface of the photoreceptor, and at this time, the energy received by the photoreceptor is the strongest. The photoreceptor converts the light signal into a current signal and then into a voltage signal, and the detection assembly outputs a constant voltage value. When the liquid contains solid particles, the light beam is blocked, the light intensity received by the photoreceptor is weakened, and the voltage output by the detection assembly is also reduced, generating a pulse. In this way, it can be determined whether solid particles pass through the liquid passing through the detection assembly.

[0076] When the solid particles pass through the detection area, the detection assembly generates a pulse signal, and the size of the solid particles is calculated according to the time domain integration of the pulse signal, the flow rate of the liquid and the width of the laser beam, so as to more accurately judge the particle condition. If no solid particles pass through in the preset time, it is considered that the detection result meets the standard, and the cleaning work can be stopped.

[0077] Meanwhile, it can also be judged whether the detected area is a bubble. Because the voltage-time curve generated when the bubble and the particle pass through is quite different, the light path changes when the light beam passes through the bubble, so the voltage output by the detection assembly is different from that of the solid particles. Therefore, if the voltage-time curve obtained does not meet the curve relationship of the solid particles, it is considered that the detected is a bubble rather than a solid particle, preventing false detection and improving detection accuracy.

[0078] In one embodiment, the sealing opening and closing part 930 comprises a fixed part 931 and an opening and closing part 932. The through hole 610 is provided with a mounting hole for sealingly mounting the fixed part 931 near the end of the outer side of the valve body 1. The opening and closing part 932 is arranged at one end of the fixed part 931 and inside the through hole 610.

[0079] One end of the cleaning nozzle 920 is sleeved on the inside of the fixed part 931.

[0080] The opening and closing part 932 comprises at least four elastic sealing sheets 9321 connected with the fixed part 931. The elastic sealing sheets 9321 are used to isolate the cleaning nozzle 920 from the through hole 610 when they are close to each other, and are used to communicate the cleaning nozzle 920 with the through hole 610 when they are separated from each other.

[0081] The working principle and beneficial effects of the above technical solution are as follows: the part of the fixed part 931 connected with the mounting hole is made of hard material and is in sealing and fixed connection with the mounting hole, and the part of the fixed part 931 connected with the opening and closing part 932 is made of elastic material, which can be rubber, so that it is easy to deform with the opening and closing part 932. The opening and closing part 932 is in a conical shape in a natural state, that is, in a state in which the four elastic sealing pieces 9321 are close to each other. At this time, the cleaning nozzle 920 is isolated from the through hole 610. Although there is liquid in the valve cavity 6, a pressure is formed on the outer side of the opening and closing part 932 away from the fixed part 931. This pressure only makes the four elastic sealing pieces 9321 fit more tightly, achieving a better sealing effect. After the cleaning nozzle 920 works, the fluid pressure sprayed by the cleaning nozzle 920 is large, so that the four elastic sealing pieces 9321 are easily separated, so that a through hole is formed in the middle of the opening and closing part 932, facilitating cleaning of the valve cavity 6. When the pressure of the cleaning nozzle 920 on the opening and closing part 932 disappears, the opening and closing part 932 is in a natural state again under the elastic restoring force of the four elastic sealing pieces 9321, so that automatic opening and closing sealing is realized.

[0082] In one embodiment, the cleaning nozzle 920 comprises an inner cylinder 921, one end of the inner cylinder 921 is in communication with the liquid inlet pipe 940, the other end of the inner cylinder 921 is provided with a first cone 922, the first cone 922 is provided with a second cone 923, one end of the second cone 923 away from the inner cylinder 921 is provided with a guide column 924 protruding from the first cone 922, the surface of the first cone 922 is uniformly provided with a plurality of first flow dividing grooves 9221 along the circumference thereof, the surface of the second cone 923 is uniformly provided with a plurality of second flow dividing grooves 9231 along the circumference thereof, the outer circumferential surface of the guide column 924 is provided with a spiral groove 9241 corresponding to the first flow dividing grooves 9221 and the second flow dividing grooves 9231, the outer side of the inner cylinder 921 is sleeved with an outer cylinder 925, one end of the outer cylinder 925 away from the first cone 922 is in sealing connection with the inner cylinder 921, and the other end of the outer cylinder 925 is sleeved on the outer surface of the first cone 922 and the outer circumferential surface of the guide column 924, so that the inner cylinder 921 and the outer cylinder 925 form an air inlet channel in communication with the air inlet pipe 950.

[0083] A liquid through hole is arranged on the axis of the second cone 923 and penetrates the second cone 923 and the guide column 924, the diameter of one end of the first cone 922 close to the inner cylinder 921 is greater than the diameter of the other end thereof, and the diameter of one end of the second cone 923 connected with the guide column 924 is greater than the diameter of the other end thereof; the first flow dividing grooves 9221 and the outer cylinder 925 form a first flow dividing channel, the second flow dividing grooves 9231 and the inner cylinder 921 form a second flow dividing channel, and the outer cylinder 925 and the spiral groove 9241 form a guide channel.

[0084] The working principle and beneficial effects of the above technical solution are as follows: In order to enable the fluid sprayed from the cleaning nozzle 920 to better remove particles attached to the surface of the sphere, in addition to relying on the spraying force, the fluid at the spray point can also be made into a swirling shape, so that the rotation of the fluid can form a tangential force with the surface of the sphere 3, thereby increasing the contact force with the particles and achieving a better cleaning purpose. The spraying end of the cleaning nozzle 920 should be set closer to the valve chamber 6, while the liquid outlet end of the through hole 610 should be set in an outward diffusion shape, not limited to... Figure 7 The structure shown;

[0085] Liquid enters the inner cylinder 921 through the inlet pipe 940, such as... Figure 12 As indicated by the arrow, under the diversion effect of the second cone 923, the liquid enters from the inner cylinder 921 into the second diversion channel and the liquid passage, where it is simultaneously pressurized. Then, it enters the guide channel formed between the outer cylinder 925 and the spiral groove 9241. The air inlet pipe 950 is connected to the outer cylinder 925, and gas enters the air inlet channel from the side of the outer cylinder 925 through the air inlet pipe 950. Figure 11 As shown by the arrow, under the diversion effect of the first cone 922, the gas enters the first diversion channel and is simultaneously increased, and then enters the guide channel formed between the outer cylinder 925 and the spiral groove 9241.

[0086] If gas and liquid are introduced simultaneously into the guide channel, they will mix in the spiral groove 9241. The outlet path of the first diversion channel forms a certain angle with the guide channel, causing the gas and liquid to collide. This results in the liquid being broken down into fine cleaning water mist, which is then sprayed out from the outlet of the guide channel. Under the action of the guide channel, the water mist can also be sprayed out in a spiral shape, using the tangential force of the spiral to carry away the particles on the sphere 3. If only gas or liquid is introduced, it will also be sprayed out in a spiral shape from the guide channel, achieving a better cleaning effect.

[0087] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0088] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0089] Although the embodiments of the present application have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, and therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. A wear-resistant fixed ball valve with both soft and hard sealing, characterized in that, include: The valve body (1) has a valve cavity (6) inside, a valve cover (2) is provided on the valve body (1), and a valve stem (4) passes through the valve cover (2) and is connected to a ball (3) provided in the valve body (1). The valve body (1) is provided with a soft and hard sealing seat (5) that seals with the ball (3). The valve body (1) is also provided with a cleaning component (7) for cleaning the valve cavity (6). The valve chamber (6) is provided with a slot (8) for installing a soft and hard sealing seat (5) at the liquid inlet. The soft and hard sealing seat (5) is slidably connected to the slot (8). The slot (8) includes: a first circular hole (810), a second circular hole (820) and a tapered hole (830) arranged in sequence, wherein the tapered hole (830) is located away from the valve cavity (6); The soft and hard sealing seat (5) includes: a limiting ring (510) sealed and connected in the first circular hole (810), a sliding ring (520) sealed and slidably disposed in the second circular hole (820), and a driving ring (530); the driving ring (530) is provided with a mounting groove, the inner ring wall of the mounting groove extends to contact the inner ring surface of the sliding ring (520), and a spring (540) is connected between the bottom surface of the mounting groove and the sliding ring (520); one end of the sliding ring (520) away from the driving ring (530) is slidably limited in the first circular hole (810), and this end of the sliding ring (520) is provided with an annular groove (521), and a soft and hard sealing element (550) is provided in the annular groove (521) to seal and contact the ball (3). The soft and hard sealing component (550) includes: an elastic plate (551) disposed at the bottom of the annular groove (521), and an outer sealing ring (552), a soft sealing ring (553) and an inner sealing ring (554) sequentially sleeved together. The outer and inner annular surfaces of the annular groove (521) are provided with limiting grooves (555). The outer sealing ring (552) and the inner sealing ring (554) are provided with sliders (556) that are slidably connected in the limiting grooves (555). The cross section of the elastic plate (551) is arc-shaped, and it elastically abuts against the outer sealing ring (552), the inner sealing ring (554) and the soft sealing ring (553) respectively. The abutment points of the outer sealing ring (552) and the inner sealing ring (554) with the elastic plate (551) are inclined surfaces.

2. The wear-resistant fixed ball valve with dual soft and hard sealing as described in claim 1, characterized in that, The valve chamber (6) is provided with a soft and hard sealing seat (5) at the liquid inlet and a soft sealing seat (10) at the liquid outlet.

3. The wear-resistant fixed ball valve with dual soft and hard sealing as described in claim 1, characterized in that, The cleaning component (7) includes: a drain port (710) at the bottom of the valve body (1) and a particle removal component (9) on the side of the valve body (1). A drain valve (11) is provided at the drain port (710). The particle removal component (9) is used to remove particles from the valve cavity (6) of the valve body (1) according to the particles contained in the liquid discharged from the drain port (710).

4. The wear-resistant fixed ball valve with dual soft and hard sealing as described in claim 3, characterized in that, The drain valve (11) is connected to a drain pipe, and the drain pipe is equipped with a detection component for detecting the particle content in the discharged liquid. The particle removal component (9) performs cleaning work based on the detection result of the detection component.

5. The wear-resistant fixed ball valve with dual soft and hard sealing as described in claim 4, characterized in that, At least four through holes (610) are arranged on the side wall of the valve chamber (6) corresponding to the particle removal assembly (9). The particle removal assembly (9) includes: a housing (910) sealed to the valve body (1), a cleaning nozzle (920) provided inside the housing (910), one end of the cleaning nozzle (920) being disposed in a through hole (610) through a sealing opening and closing member (930), the other end of the cleaning nozzle (920) being connected to a liquid inlet pipe (940), and an air inlet pipe (950) being connected to the side of the cleaning nozzle (920).

6. The wear-resistant fixed ball valve with dual soft and hard sealing as described in claim 5, characterized in that, The sealing opening and closing component (930) includes: a fixing part (931) and an opening and closing part (932). The end of the through hole (610) near the outside of the valve body (1) is provided with a mounting hole for sealing and installing the fixing part (931). The opening and closing part (932) is located at one end of the fixing part (931) and is located inside the through hole (610). One end of the cleaning nozzle (920) is sleeved on the inside of the fixing part (931); The opening and closing part (932) includes at least four elastic sealing plates (9321) connected to the fixing part (931). When the elastic sealing plates (9321) are close to each other, they are used to isolate the cleaning nozzle (920) from the through hole (610). When the elastic sealing plates (9321) are separated from each other, they are used to connect the cleaning nozzle (920) to the through hole (610).

7. The wear-resistant fixed ball valve with dual soft and hard sealing as described in claim 5, characterized in that, The cleaning nozzle (920) includes: an inner cylinder (921), one end of which is connected to an inlet pipe (940), and the other end of which is provided with a first cone (922). A second cone (923) is provided inside the first cone (922). A guide post (924) protruding from the first cone (922) is provided at the end of the second cone (923) away from the inner cylinder (921). A plurality of first diversion grooves (9221) are evenly arranged along the circumference of the surface of the first cone (922), and a plurality of first diversion grooves (9221) are evenly arranged along the circumference of the surface of the second cone (923). The inner cylinder (921) is provided with multiple second diversion grooves (9231). The outer circumferential surface of the guide column (924) is provided with spiral grooves (9241) corresponding to the first diversion groove (9221) and the second diversion groove (9231). An outer cylinder (925) is sleeved on the outer side of the inner cylinder (921). One end of the outer cylinder (925) away from the first cone (922) is sealed to the inner cylinder (921), and the other end is sleeved on the outer surface of the first cone (922) and the outer circumferential surface of the guide column (924), so that an air intake channel communicating with the air intake pipe (950) is formed between the inner cylinder (921) and the outer cylinder (925).

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