High-temperature and high-pressure hydrophobic hard sealing ball valve with valve seat spring compression amount capable of being quantified on line

Abstract

The invention relates to the technical field of valves, in particular to a high-temperature and high-pressure hydrophobic hard sealing ball valve with the compression amount of a valve seat spring capable of being quantified on line, and the high-temperature and high-pressure hydrophobic hard sealing ball valve comprises a valve body provided with a valve cavity and a medium channel communicated with the valve cavity; the ball core is rotatably arranged in the valve cavity; one end of the valve rod extends into the valve body and is in driving connection with the ball core; the two valve seats are oppositely arranged in the valve cavity and located on the two sides of the ball core respectively, and a sealing pair is formed by the two valve seats and the spherical surface of the ball core. The two compression amount adjusting mechanisms are relatively fixed in the valve cavity and are correspondingly matched with the sides, back to the ball core, of the two valve seats respectively; the springs are correspondingly arranged between the valve seats and the compression amount adjusting mechanisms on the same sides of the valve seats; and the quantization pointer mechanism is arranged outside the valve body and is connected with the two compression amount adjusting mechanisms. The quantification pointer mechanism is connected with the compression amount adjusting mechanism, the compression amount of the spring can be indicated in real time, online quantification of the compression amount of the valve seat spring is achieved, and accurate regulation, control and maintenance are facilitated.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and more specifically, to a high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantification of valve seat spring compression. Background Technology

[0002] Hard-seal ball valves are widely used in high-temperature, high-pressure drainage pipelines in industries such as petroleum, chemical, and power plants due to their excellent temperature resistance, pressure resistance, and wear resistance. These valves typically employ a metal sealing pair consisting of a ball and a seat, relying on a preload spring to apply axial load to the seat to ensure reliable sealing under harsh conditions. Over time, the seat sealing surface inevitably experiences erosion, wear, or high-temperature creep, leading to a decrease in spring preload, a drop in sealing pressure, and ultimately, internal leakage. Traditional maintenance methods require system shutdown and complete depressurization before valve disassembly can be performed to adjust spring compression and restore sealing performance. This process is not only cumbersome and time-consuming but also prevents adjustments to the sealing condition during valve operation. Summary of the Invention

[0003] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0004] To at least partially solve the above problems, the present invention provides a high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression, comprising: a valve body having a valve cavity and a medium channel communicating with the valve cavity; a ball core rotatably disposed within the valve cavity; a valve stem, one end extending into the valve body and drivenly connected to the ball core, and the other end for connection to an external drive device; two valve seats, disposed opposite each other within the valve cavity and located on opposite sides of the ball core, forming a sealing pair with the spherical surface of the ball core; two compression adjustment mechanisms, fixed opposite each other within the valve cavity and respectively corresponding to the side of the two valve seats facing away from the ball core; a spring, correspondingly disposed between each valve seat and the compression adjustment mechanism on the same side, the preload of the spring being limited by the valve seats and compression adjustment mechanisms at both ends; and a quantizing pointer mechanism disposed outside the valve body and connected to the two compression adjustment mechanisms for real-time indication of the spring compression.

[0005] Optionally, multiple annular throttling grooves are uniformly arranged along the axial direction on the contact surface between the valve seat and the ball core.

[0006] Optionally, a hard alloy layer is deposited on the surface of the ball core, and a scraping edge is formed on the hard alloy layer.

[0007] Optionally, the valve seat includes: an annular seat body with an arc-shaped sealing surface on the side facing the ball core that matches the spherical surface of the ball core; a guide tube, one end of which is fixedly connected to the side of the annular seat body facing away from the ball core, and the other end of which extends into the medium passage of the valve body; a spring and a compression adjustment mechanism are sequentially sleeved on the outer periphery of the guide tube; the guide tube and the inner wall of the medium passage are in a sealing sliding fit; and a tapered guide surface is provided at the end of the guide tube that extends into the medium passage.

[0008] Optionally, an annular sealing airbag for contacting the surface of the ball core is installed in the annular groove opened on the arc-shaped sealing surface.

[0009] Optionally, the compression adjustment mechanism includes: an annular slide, slidably fitted outside the guide tube, with a spring supporting the annular body and the annular slide; a conical ring, located on the side of the annular slide facing away from the spring, with the annular slide and the conical ring abutting each other through a first conical surface and a second conical surface that cooperate with each other; multiple top pressure shafts, distributed circumferentially, one end of which is connected to the conical ring; and an annular piston disc, sealed and slidably disposed inside an annular cylinder, and connected to the other end of each top pressure shaft; wherein, the closed end of the annular cylinder is provided with a medium injection port communicating with the quantization pointer mechanism, and its open end is provided with a guide structure for the top pressure shafts to pass through.

[0010] Optionally, a sensor mounting groove is provided on the outer conical surface of the conical ring, and a pressure sensor for measuring the pressure between the pressure-bearing conical surface and the conical ring is installed in the sensor mounting groove.

[0011] Optionally, the annular sealing airbag is connected to a rigid tube fixed in the transverse perforation of the annular seat. The rigid tube is connected to a pressure-bearing airbag sleeved on the outer periphery of the guide tube. When the annular slide moves to a preset position in the direction of the annular seat, the annular slide contacts the pressure-bearing airbag and squeezes the gas in the pressure-bearing airbag into the annular sealing airbag through the rigid tube, so that the annular sealing airbag seals against the surface of the ball core.

[0012] Optionally, the quantization pointer mechanism includes: an injection sleeve, one end of which is connected to the medium injection port via a bend, and the other end of which is fixedly connected to the center hole of a sealing disc that is slidably fitted inside the quantization cylinder; the middle part of the injection sleeve is threadedly connected to the inner side of a compression adjustment ring, and the compression adjustment ring is rotatably connected to an end seat at the open end of the quantization cylinder; a guide slide fixedly attached to the bottom of the quantization cylinder is slidably fitted in a guide groove of the valve body; a medium addition pipe with a sealing plug is provided at the end of the quantization cylinder away from the injection sleeve; a rack is fixedly connected to the top of the quantization cylinder along its axial direction, the rack meshes with a gear, the gear is rotatably connected to a wheel axle, the wheel axle is fixed to the valve body, a scale for indicating the spring compression is fixed on the front end face of the gear, and a quantization pointer for pointing to the scale on the wheel axle is fixed on the wheel axle.

[0013] Optionally, a starting stop is also fixed on the front end face of the gear, and the quantization pointer engages with the starting stop when the sealing disc contacts the end seat.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: The high-temperature, high-pressure, hydrophobic hard-seal ball valve of this invention, through the connection of a quantification pointer mechanism and a compression adjustment mechanism, can indicate the spring compression in real time, realizing online quantification of the valve seat spring compression, which facilitates precise control and maintenance. The contact surface between the valve seat and the ball core is provided with an annular throttling groove, and the surface of the ball core is overlaid with a hard alloy layer and forms a scraping edge, which can improve sealing performance and wear resistance. The internally designed unique compression adjustment mechanism can finely adjust the spring preload online without interrupting system operation, to compensate for the preload attenuation caused by long-term wear of the valve seat or high-temperature creep, effectively restore and maintain the sealing specific pressure, and significantly improve the convenience of valve maintenance.

[0015] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] 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: Figure 1 This is a front view of the high-temperature, high-pressure hydrophobic hard-seal ball valve of the present invention; Figure 2 This is a top view of the high-temperature, high-pressure hydrophobic hard-seal ball valve of the present invention; Figure 3 This is a left view of the high-temperature, high-pressure hydrophobic hard-seal ball valve of the present invention. Figure 4 This is a cross-sectional view of the high-temperature, high-pressure hydrophobic hard-seal ball valve of the present invention. Figure 5 This is a partial schematic diagram of the high-temperature, high-pressure hydrophobic hard-seal ball valve of the present invention; Figure 6 This is a schematic diagram of the valve seat of the present invention; Figure 7 This is a cross-sectional view of the compression adjustment mechanism of the present invention; Figure 8 This is a schematic diagram of the quantization pointer mechanism of the present invention; Figure 9 This is a cross-sectional view of the quantization pointer mechanism of the present invention; Figure 10 This is a partial schematic diagram of the quantization pointer mechanism of the present invention.

[0017] Icons: Valve body 1; Ball core 2; Valve seat 3; Annular seat 301; Guide pipe 302; Annular sealing airbag 303; Rigid pipe 304; Pressure-bearing airbag 305; Compression adjustment mechanism 4; Annular slide 401; Conical ring 402; Top pressure shaft 403; Annular piston disc 404; Annular cylinder 405; Medium injection port 406; Pressure sensor 407; Spring 5; Quantizing pointer mechanism 6; Injection sleeve 601; Quantizing cylinder 602; Sealing disc 603; Compression adjustment ring 604; Guide slide 605; Medium addition pipe 606; Rack 607; Gear 608; Wheel axle 609; Dial 610; Quantizing pointer 611; Starting stop 612. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0020] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0021] The following is in conjunction with the appendix Figures 1-10 The present invention will be described in further detail below.

[0022] Example 1: As Figures 1-10 As shown, a high-temperature, high-pressure, hydrophobic, hard-seal ball valve with online quantifiable valve seat spring compression includes: a valve body 1 having a valve cavity and a medium passage communicating with the valve cavity; a ball core 2 rotatably disposed within the valve cavity; a valve stem, one end of which extends into the valve body 1 and is drivenly connected to the ball core 2, and the other end of which is used to connect to an external drive device; two valve seats 3, which are disposed opposite each other within the valve cavity and located on both sides of the ball core 2, forming a sealing pair with the spherical surface of the ball core 2; two compression adjustment mechanisms 4, which are fixed opposite each other within the valve cavity and respectively cooperate with the two valve seats 3 on the side opposite to the ball core 2; a spring 5, which is correspondingly disposed between each valve seat 3 and the compression adjustment mechanism 4 on the same side, the preload of the spring 5 being limited by the valve seats 3 and the compression adjustment mechanism 4 at both ends of the spring 5; and a quantifying pointer mechanism 6, disposed outside the valve body 1 and connected to the two compression adjustment mechanisms 4, for real-time indication of the compression of the spring 5.

[0023] The working principle and technical effects of the above scheme are as follows: The present invention relates to a high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression. During operation, an external drive device drives the ball core 2 to rotate within the valve cavity of the valve body 1 via the valve stem, thereby opening and closing the ball valve. The medium flows through the medium channel of the valve body 1. Two valve seats 3 are located on both sides of the ball core 2, forming a sealing pair with the spherical surface of the ball core 2 to ensure that the medium does not leak and to guarantee the basic sealing function of the ball valve. The spring 5 is disposed between the valve seat 3 and the compression adjustment mechanism 4 on the same side. The preload of the spring 5 is limited by the two. When it is necessary to adjust the sealing degree between the valve seat 3 and the ball core 2, the compression adjustment mechanism 4 can be operated to change the compression of the spring 5. For example, increasing the compression of spring 5 allows valve seat 3 to fit more tightly against ball core 2, enhancing the sealing effect; conversely, decreasing the compression weakens the sealing effect. The quantitative pointer mechanism 6 is located outside the valve body 1 and connected to the compression adjustment mechanism 4, which can indicate the compression of spring 5 in real time, allowing operators to intuitively understand the compression state of spring 5. This avoids the blindness of relying solely on experience in traditional methods, enabling online quantitative monitoring and precise adjustment of spring compression, improving the performance and reliability of the ball valve, and extending its service life. It is especially suitable for complex working conditions such as high temperature, high pressure, and drainage.

[0024] Multiple annular throttling grooves are uniformly arranged axially on the contact surface between the valve seat 3 and the ball core 2. A hard alloy layer is welded to the surface of the ball core 2, and a scraping edge is formed on this hard alloy layer. When the ball valve operates, and the medium flows between the valve seat 3 and the ball core 2, the annular throttling grooves act as a throttling mechanism. As the medium flows through the annular throttling grooves, it continuously changes its flow direction and velocity, creating local resistance, thereby reducing the flow velocity and pressure of the medium. On the one hand, this effectively reduces the scouring and erosion of the sealing surfaces of the valve seat 3 and the ball core 2 by the medium, extending the service life of the sealing surfaces; on the other hand, it improves the throttling performance of the ball valve, making the ball valve more precise and stable in regulating the flow rate and pressure of the medium. A hard alloy layer is welded to the surface of the ball core 2, and a scraping edge is formed on this hard alloy layer. During the opening and closing process of the ball valve, the ball core 2 rotates, and the scraping edge scrapes and cleans any impurities or dirt that may exist on the sealing surface of the valve seat 3. The hard alloy layer itself has high hardness and good wear resistance, providing good protection for the ball core 2. It can ensure the cleanliness of the sealing surface between the ball core 2 and the valve seat 3, and avoid impurities from affecting the sealing performance. At the same time, the hard alloy layer enhances the wear resistance of the ball core 2, making the ball core 2 less prone to wear during long-term use, maintaining a stable and reliable sealing effect between the ball core 2 and the valve seat 3, and improving the durability and operational reliability of the entire ball valve.

[0025] Example 2: As Figures 1-10As shown, the valve seat 3 includes: an annular seat 301, with an arc-shaped sealing surface on the side facing the ball core 2 that matches the spherical surface of the ball core 2; a guide tube 302, one end of which is fixedly connected to the side of the annular seat 301 facing away from the ball core 2, and the other end extending into the medium channel of the valve body 1; a spring 5 and a compression adjustment mechanism 4 are sequentially sleeved on the outer circumference of the guide tube 302; the guide tube 302 and the inner wall of the medium channel are in a sealing sliding fit; the end of the guide tube 302 extending into the medium channel is provided with a tapered guide surface. An annular sealing airbag 303 for contacting the surface of the ball core 2 is installed in the annular groove opened on the arc-shaped sealing surface. The compression adjustment mechanism 4 includes: an annular slide 401, slidably sleeved on the outside of the guide tube 302, with a spring 5 supporting the annular seat 301 and the annular slide 401; a conical ring 402, located on the side of the annular slide 401 facing away from the spring 5, with the annular slide 401 and the conical ring 402 abutting each other through a first conical surface and a second conical surface that cooperate with each other; multiple top pressure shafts 403, distributed circumferentially, with one end connected to the conical ring 402; and an annular piston disc 404, sealed and slidably disposed inside an annular cylinder 405, and connected to the other end of each top pressure shaft 403; wherein, the closed end of the annular cylinder 405 is provided with a medium injection port 406 communicating with the quantization pointer mechanism 6, and its open end is provided with a guide structure for the top pressure shafts 403 to pass through.

[0026] The working principle and technical effects of the above scheme are as follows: The high-temperature, high-pressure, hydrophobic hard-seal ball valve of the present invention allows for online quantification of the valve seat spring compression. During use, a medium is pre-added to the quantification pointer mechanism 6. When adjustment of the spring 5 compression is required, the medium is injected into the annular cylinder 405 through the medium injection port 406. As the medium is injected, the annular piston disc 404 moves within the annular cylinder 405 in a direction away from the medium injection port 406 (i.e., towards the spring 5). The annular piston disc 404, through multiple circumferentially distributed top pressure shafts 403, drives the conical ring 402 to move towards the spring 5. Since the conical ring 402 and the annular slide 401 abut against each other through a first and second conical surface, the conical ring 402 pushes the annular slide 401 to slide on the guide pipe 302, thereby compressing the spring 5 supported between the annular seat body 301 and the annular slide 401, thus adjusting the spring 5 compression.

[0027] This invention relates to a high-temperature, high-pressure, condensate-free hard-seal ball valve with online quantification of valve seat spring compression. This allows for precise adjustment of sealing performance, enabling accurate adjustment of the spring 5 compression based on sealing requirements under different operating conditions. Changes in spring 5 compression cause the arc-shaped sealing surface on the annular seat 301 of the valve seat 3 to fit more tightly or loosely against the ball core 2, thus flexibly controlling the sealing degree and ensuring good sealing performance even under complex conditions such as high temperature, high pressure, and condensate drainage. Since the quantification pointer mechanism 6 is connected to the medium injection port 406, it can indicate the spring 5 compression in real time during adjustment, achieving online quantification of spring compression. This avoids the blindness and reliance on experience in traditional adjustment methods, improving the accuracy and reliability of the adjustment. The guide pipe 302 of the valve seat 3 slides in a sealing manner with the inner wall of the medium channel, providing stable guidance for the sliding of the annular slide 401 and ensuring the smoothness of the adjustment process. Simultaneously, the guide structure of the annular cylinder 405 guides the top pressure shaft 403, making the movement of the entire compression adjustment mechanism 4 more stable and improving the overall reliability and service life of the ball valve. The annular throttling groove on the contact surface between the annular seat body 301 of the valve seat 3 and the ball core 2 can reduce the medium flow rate and pressure, and reduce the scouring of the sealing surface; while the annular sealing airbag 303 can further enhance the sealing effect during the adjustment of the compression of the spring 5. The two work together to improve the overall performance of the ball valve.

[0028] Example 3: As Figures 1-10 As shown, a sensor mounting groove is provided on the outer conical surface of the conical ring 402, and a pressure sensor 407 for measuring the pressure between the pressure-bearing conical surface and the conical ring 402 is installed in the sensor mounting groove.

[0029] The working principle and technical effects of the above scheme are as follows: In the initial state of this high-temperature, high-pressure, hydrophobic hard-seal ball valve where the compression of the valve seat spring can be quantified online, the spring 5 is compressed to a preset value to ensure a basic sealing effect between the valve seat 3 and the ball core 2. At this time, the pressure sensor 407 installed in the sensor mounting groove on the outer conical surface of the conical ring 402 will acquire an initial pressure value, which reflects the pressure between the pressure cone surface and the conical ring 402 of the spring 5 in the initial compressed state.

[0030] As the ball valve is used over time or through frequent opening and closing operations, the spring 5 will gradually lose its elasticity. When the spring 5 loses its elasticity, its supporting force on the annular slide 401 decreases, which in turn reduces the pressure between the pressure-bearing cone surface and the cone ring 402. The pressure sensor 407 monitors this pressure value in real time. When the detected actual pressure value is lower than the initial pressure value, it indicates that the elasticity of the spring 5 is no longer sufficient to maintain an effective seal.

[0031] At this point, the medium in the quantization pointer mechanism 6 needs to be injected into the annular cylinder 405 through the medium injection port 406. After the medium is injected, the annular piston disc 404 moves towards the spring 5 inside the annular cylinder 405, driving the conical ring 402 to move towards the spring 5 through multiple pressure shafts 403. The conical ring 402 presses against the annular slide block 401, which slides on the guide tube 302, further compressing the spring 5. During this process, the pressure sensor 407 continuously monitors the pressure change. When the pressure sensor 407 detects that the pressure value has returned to the initial pressure value, it indicates that the compression of the spring 5 has been adjusted to a suitable state, and the adjustment is complete.

[0032] This invention relates to a high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantification of valve seat spring compression. It enables real-time monitoring and early warning. The pressure sensor 407 allows the ball valve to monitor the elasticity of the spring 5 in real time. By comparing the actual pressure value with the initial pressure value, it can promptly detect weakened spring 5 elasticity, issuing early warnings to avoid media leakage due to seal failure, thus improving the safety and reliability of the ball valve operation. This invention can also precisely adjust the spring compression. Based on feedback from the pressure sensor 407, it can accurately control the amount of medium injected into the annular cylinder 405 by the quantification pointer mechanism 6, thereby precisely adjusting the spring 5 compression. Compared to traditional experience-based adjustment, pressure feedback-based adjustment is more scientific and accurate, ensuring a consistently good seal between the valve seat 3 and the ball core 2. Furthermore, this invention can promptly detect and adjust weakened spring 5 elasticity, preventing excessive fatigue and damage to the spring 5, extending its service life. Simultaneously, it ensures the sealing performance of the ball valve, reducing damage to other components due to sealing problems, thereby extending the overall service life of the ball valve.

[0033] Example 4: Figures 1-10 As shown, the annular sealing airbag 303 is connected to the rigid tube 304 fixed in the transverse perforation of the annular seat 301. The rigid tube 304 is connected to the pressure-bearing airbag 305 sleeved on the outer periphery of the guide tube 302. When the annular slide 401 moves to the preset position in the direction of the annular seat 301, the annular slide 401 contacts the pressure-bearing airbag 305 and squeezes the gas in the pressure-bearing airbag 305 into the annular sealing airbag 303 through the rigid tube 304, so that the annular sealing airbag 303 seals against the surface of the ball core 2.

[0034] The working principle and technical effects of the above scheme are as follows: In the initial state of normal operation of this high-temperature, high-pressure, hydrophobic, hard-seal ball valve, spring 5 is under a certain compression, and the annular slide 401 maintains a certain distance from the annular seat 301. As the ball valve is used, the elasticity of spring 5 gradually weakens, and the annular slide 401 moves towards the annular seat 301. When the annular slide 401 moves to a preset position (such as half the initial distance between the annular slide 401 and the annular seat 301), it means that the elasticity of spring 5 has weakened considerably, and the pressure provided by spring 5 alone may not be able to guarantee a good sealing effect. At this time, the annular slide 401 comes into contact with the pressure-bearing airbag 305 sleeved on the outer periphery of the guide pipe 302 and compresses the pressure-bearing airbag 305. After being compressed, the gas inside the pressure-bearing airbag 305 flows through the rigid pipe 304 connected to the pressure-bearing airbag 305 to the annular sealing airbag 303 connected to the rigid pipe 304. As gas flows in, the annular sealing airbag 303 expands, thereby tightly sealing against the surface of the ball core 2 and enhancing the sealing performance between the valve seat 3 and the ball core 2.

[0035] The technical advantages of this high-temperature, high-pressure hydrophobic hard-seal ball valve are as follows: 1. Enhanced sealing reliability: When the elasticity of spring 5 weakens and the sealing performance may decline, the annular sealing airbag 303 can play its role in time; by the pressure-bearing airbag 305 squeezing gas into the annular sealing airbag 303 to make it expand, the seal between valve seat 3 and ball core 2 is further strengthened, effectively preventing media leakage and improving the sealing reliability of ball valve during long-term use.

[0036] 2. Adaptive Compensation: This structure achieves adaptive compensation for the weakening elasticity of spring 5. Without manual intervention, when the annular slide 401 moves to the preset position, it automatically triggers the process of the pressure-bearing airbag 305 supplying gas to the annular sealing airbag 303, ensuring stable sealing performance and reducing the risk of seal failure caused by changes in spring performance.

[0037] 3. Extend the service life of the ball valve: Because it can promptly compensate for the sealing problems caused by the weakening of the elasticity of spring 5, it reduces the scouring and erosion of the sealing surface by the medium, reduces the possibility of damage to the sealing surface, thereby extending the overall service life of the ball valve and reducing maintenance and replacement costs.

[0038] 4. Simple and effective structure: The pressure-bearing airbag 305 and the annular sealing airbag 303 are connected by a rigid pipe 304. The gas is squeezed and transported by the movement of the annular slide 401. The structure is relatively simple, easy to implement and maintain, and can significantly improve the sealing performance of the ball valve without adding too many complex structures.

[0039] Example 5: Figures 1-10As shown, the quantization pointer mechanism 6 includes: an injection sleeve 601, one end of which is connected to the medium injection port 406 via a bent pipe, and the other end of which is fixedly connected to the center hole of the sealing disc 603, which is slidably sealed inside the quantization cylinder 602; the middle part of the injection sleeve 601 is threadedly connected to the inner side of the compression adjustment ring 604, and the compression adjustment ring 604 is rotatably connected to the end seat at the opening of the quantization cylinder 602; a guide slide 605 fixedly connected to the bottom of the quantization cylinder 602 is slidably fitted to the guide of the valve body 1. A medium adding tube 606 with a sealing plug is installed at the end of the quantizing cylinder 602 away from the injection sleeve. A rack 607 is fixedly connected to the top of the quantizing cylinder 602 along its axial direction. The rack 607 meshes with a gear 608, which is rotatably connected to an axle 609. The axle 609 is fixed to the valve body 1. A scale 610 for indicating the compression of the spring 5 is fixed on the front end face of the gear 608. A quantizing pointer 611 for pointing to the scale on the scale 610 is fixed on the axle 609. A starting stop 612 is also fixed on the front end face of the gear 608. When the sealing disc 603 contacts the end seat, the quantizing pointer 611 contacts and engages with the starting stop 612.

[0040] The working principle and technical effects of the above scheme are as follows: In the initial state, the sealing disc 603 is in contact with the end seat, and a chamber for injecting medium is formed between the sealing disc 603 and the closed end of the measuring cylinder 602. The medium is injected into the chamber through the medium adding pipe 606 until the medium fills the chamber, and the spring 5 is compressed to a preset value that can ensure the basic sealing effect between the valve seat 3 and the ball core 2. At this time, the pressure sensor 407 obtains the initial pressure value and stops injecting medium. When it is necessary to adjust the compression of spring 5, rotate the compression adjustment ring 604. Since the inner side of the compression adjustment ring 604 is threadedly connected to the middle of the injection sleeve 601, rotating the compression adjustment ring 604 will change its contact position with the injection sleeve 601. The compression adjustment ring 604 is rotatably connected to the end seat at the open port of the quantitative cylinder 602, so it will drive the quantitative cylinder 602 to move towards the ball core 2 through the end seat. The guide slide 605 at the bottom of the quantitative cylinder 602 slides in the guide groove of the valve body 1 to ensure the stability of the movement of the quantitative cylinder 602. As the quantitative cylinder 602 moves towards the ball core 2, the volume of the medium chamber between the sealing disc 603 and the closed end of the quantitative cylinder 602 decreases, and the medium is squeezed and pressed into the medium injection port 406 through the injection sleeve 601 and the bend, and finally enters the annular cylinder 405. After the medium enters the annular cylinder 405, it pushes the annular piston disc 404 to move, and then compresses the spring 5 through the top pressure shaft 403 and the cone ring 402, thereby realizing the adjustment of the compression of spring 5. As the quantizing cylinder 602 moves toward the ball core 2, the rack 607 fixedly connected to the top of the quantizing cylinder 602 also moves toward the ball core 2. The rack 607 meshes with the gear 608, and the movement of the rack 607 drives the gear 608 to rotate. The gear 608 is rotatably connected to the axle 609, and a dial 610 is fixed on the front end face of the gear 608. Therefore, the dial 610 will rotate on the axle 609 along with the gear 608. A quantizing pointer 611 is fixed on the axle 609. Different scale values ​​on the dial 610 are matched with the quantizing pointer 611 to display the real-time compression of the spring 5. When the sealing disc 603 contacts the end seat, the quantizing pointer 611 contacts and engages with the starting stop 612, which can serve as an indicator of the initial position.

[0041] This invention controls the movement of the measuring cylinder 602 by rotating the compression adjustment ring 604, thereby adjusting the volume of the medium chamber and achieving precise control of the medium entering the annular cylinder 405. This allows for precise adjustment of the compression of the spring 5, meeting the sealing requirements between the valve seat 3 and the ball core 2 under different operating conditions. Utilizing the cooperation of the rack 607, gear 608, dial 610, and measuring pointer 611, the linear motion of the measuring cylinder 602 is converted into the rotation of the dial 610, displaying the compression of the spring 5 in real time. This intuitive quantitative display allows operators to clearly understand the compression state of the spring 5, facilitating accurate adjustment and monitoring. The measuring cylinder 602 slides within the guide groove of the valve body 1 via the guide slide 605, ensuring the stability of its movement and preventing swaying and deviation during operation, thus ensuring the accuracy of medium delivery and compression adjustment. Furthermore, the reasonable connections and cooperation between the components result in a stable and reliable overall structure, reducing the possibility of malfunctions. In addition, the compression of spring 5 can be adjusted by rotating the compression adjustment ring 604. The operation is simple and convenient, reducing the technical requirements and labor intensity of operators and improving work efficiency. By precisely adjusting the compression of spring 5, a good sealing effect can always be maintained between valve seat 3 and ball core 2 to prevent media leakage and improve the performance and safety of ball valve.

[0042] 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.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression, characterized in that: include: The valve body has a valve cavity and a medium passage communicating with the valve cavity; a ball core is rotatably disposed in the valve cavity; a valve stem extends into the valve body at one end and is drivenly connected to the ball core; two valve seats are disposed opposite each other in the valve cavity and are located on both sides of the ball core, forming a sealing pair with the spherical surface of the ball core; two compression adjustment mechanisms are fixed opposite each other in the valve cavity and are respectively matched with the two valve seats on the side opposite to the ball core; a spring is disposed between each valve seat and the compression adjustment mechanism on the same side, and the preload of the spring is limited by the valve seats and compression adjustment mechanisms at both ends; a quantitative pointer mechanism is disposed outside the valve body and connected to the two compression adjustment mechanisms for real-time indication of the spring compression.

2. The high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression as described in claim 1, characterized in that, Multiple annular throttling grooves are uniformly arranged along the axial direction on the contact surface between the valve seat and the ball core.

3. The high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression as described in claim 2, characterized in that, The surface of the ball core is overlaid with a hard alloy layer, and a scraping edge is formed on the hard alloy layer.

4. The high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression as described in claim 1, characterized in that, The valve seat includes: an annular seat body with an arc-shaped sealing surface on the side facing the ball core that matches the spherical surface of the ball core; a flow guide tube, one end of which is fixedly connected to the side of the annular seat body facing away from the ball core, and the other end of which extends into the medium passage of the valve body; a spring and a compression adjustment mechanism are sequentially sleeved on the outer circumference of the flow guide tube; the flow guide tube and the inner wall of the medium passage are in a sealing sliding fit; and a tapered flow guide surface is provided at the end of the flow guide tube that extends into the medium passage.

5. The high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression as described in claim 4, characterized in that, An annular sealing airbag is installed in the annular groove on the arc-shaped sealing surface to abut against the surface of the ball core.

6. The high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression as described in claim 5, characterized in that, The compression adjustment mechanism includes: an annular slide, slidably fitted outside the guide tube, with a spring supporting the annular body and the annular slide; a conical ring, located on the side of the annular slide facing away from the spring, with the annular slide and the conical ring abutting each other through a first conical surface and a second conical surface that cooperate with each other; multiple top pressure shafts, distributed circumferentially, one end of which is connected to the conical ring; and an annular piston disc, sealed and slidably disposed inside an annular cylinder, and connected to the other end of each top pressure shaft; wherein, the closed end of the annular cylinder is provided with a medium injection port communicating with the quantization pointer mechanism, and its open end is provided with a guide structure for the top pressure shafts to pass through.

7. The high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression as described in claim 6, characterized in that, A sensor mounting groove is provided on the outer conical surface of the conical ring, and a pressure sensor for measuring the pressure between the pressure-bearing conical surface and the conical ring is installed in the sensor mounting groove.

8. The high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression according to claim 6, characterized in that, The annular sealing airbag is connected to a rigid tube fixed in the transverse perforation of the annular seat. The rigid tube is connected to a pressure-bearing airbag sleeved on the outer periphery of the guide tube. When the annular slide moves to the preset position in the direction of the annular seat, the annular slide contacts the pressure-bearing airbag and squeezes the gas in the pressure-bearing airbag into the annular sealing airbag through the rigid tube, so that the annular sealing airbag seals against the surface of the ball core.

9. The high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression as described in claim 8, characterized in that, The quantization pointer mechanism includes: an injection sleeve, one end of which is connected to the medium injection port via a bend, and the other end of which is fixedly connected to the center hole of a sealing disc that is slidably fitted inside the quantization cylinder; the middle part of the injection sleeve is threadedly connected to the inner side of a compression adjustment ring, which is rotatably connected to an end seat at the open end of the quantization cylinder; a guide slide fixed to the bottom of the quantization cylinder is slidably fitted in a guide groove of the valve body; a medium addition pipe with a sealing plug is provided at the end of the quantization cylinder away from the injection sleeve; a rack is fixedly connected to the top of the quantization cylinder along its axial direction, the rack meshes with a gear, the gear is rotatably connected to a wheel axle, the wheel axle is fixed to the valve body, a scale for indicating the spring compression is fixed on the front end face of the gear, and a quantization pointer for pointing to the scale on the wheel axle is fixed on the wheel axle.

10. The high-temperature, high-pressure, hydrophobic hard-seal ball valve with online quantifiable valve seat spring compression according to claim 9, characterized in that, A starting stop is also fixed on the front end face of the gear. When the sealing disc contacts the end seat, the quantization pointer contacts and engages with the starting stop.

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