Gate valve capable of feeding back pressure

Abstract

The invention discloses a gate valve capable of feeding back pressure, which relates to the technical field of valves, and comprises a valve body, a valve rod on the valve body, a gate plate at the bottom end of the valve rod, a first assembly positioned in the gate plate and a second assembly positioned in the gate plate, a feedback cavity is formed in the gate plate, a guide column is fixedly connected to the inner wall of the feedback cavity of the gate plate, and annular grooves are formed in the guide column at equal intervals. The problems that an existing traditional gate valve cannot monitor pressure in real time and depends on manual inspection or post troubleshooting, so that abnormities such as pressure sudden rise cannot be found in time are solved. The first assembly can capture pressure changes in the pipeline in real time through the strain gauges, and accidents such as pipeline cracking and medium leakage caused by too high pressure due to pump body faults, misoperation or blockage can be effectively avoided in the mode that abnormal information is transmitted in real time through electric signals by means of mechanical triggering of a feedback mechanism; especially for flammable and explosive and toxic medium conveying scenes, the risks of fire disasters, explosions or personnel poisoning can be reduced from the source.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a gate valve capable of providing pressure feedback. Background Technology

[0002] In the production sector, pipeline systems are responsible for transporting various media (such as petroleum, chemical raw materials, and gas / fluids with water as the main medium). Gate valves, as core components controlling the flow of these media, directly impact the continuity and safety of the production process. Traditional gate valves can only be operated manually or electrically, failing to monitor pressure changes within the pipeline in real time. When transporting high-pressure fluids, a sudden increase in local pressure due to pump malfunction, valve misoperation, or pipeline blockage cannot be promptly reported by traditional gate valves. This can easily lead to accidents such as pipeline weld cracking and flange leakage, resulting not only in material waste but also, in the case of flammable or explosive media leaks, serious safety accidents such as fires and explosions, causing significant economic losses and personnel casualties for enterprises.

[0003] Furthermore, the pressure relief design of existing gate valves has significant drawbacks when the pressure is too high: most traditional gate valves are not equipped with automatic pressure relief devices. When the internal pressure of the pipeline or equipment exceeds the rated range due to sudden changes in medium flow, temperature rise, or system failure, manual operation of the flood discharge valve or bypass valve is required to reduce the pressure. The above-mentioned manual intervention not only requires extremely high reaction speed and professional skills from the operators, but also has serious lag. In emergency scenarios where the pressure rises sharply, the delay in manual operation can easily cause the pressure to exceed the equipment's tolerance limit, leading to safety accidents such as pipeline rupture, medium leakage, or even explosion, posing a great threat to production safety and the lives and property of personnel.

[0004] Even though some gate valves integrate pressure relief functions, their pressure relief structures often adopt a separate design of an external safety valve and the gate valve body. While this design can achieve pressure relief to a certain extent, it has many inherent drawbacks: Firstly, the separate structure requires additional connecting pipelines and installation space, increasing the complexity and footprint of the system, especially in space-constrained industrial settings, significantly increasing the difficulty of installation and maintenance. Secondly, the connection between the external safety valve and the gate valve body is prone to leakage, which not only affects the efficiency of media delivery but also leads to a decrease in pressure relief accuracy due to seal failure, making it impossible to accurately control the system pressure within the safety threshold. In addition, the separate design results in poor coordination between the pressure relief component and the gate valve, causing delays in pressure signal transmission and making it difficult to guarantee the pressure relief response speed.

[0005] In conclusion, the deficiencies of traditional gate valves in pressure monitoring and automatic pressure relief have become key factors restricting the safe and efficient operation of pipeline systems, whether in industrial production, municipal water supply, or water conservancy projects. Therefore, developing a gate valve capable of real-time pressure feedback and automatic pressure relief when pressure is too high is of great significance for improving the safety, stability, and economy of pipeline systems.

[0006] Therefore, this invention proposes a gate valve with feedback pressure to solve the above problems. Summary of the Invention

[0007] In view of this, the technical problem to be solved by the present invention is to provide a gate valve with feedback pressure to solve the problems existing in the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a gate valve capable of feedback pressure, comprising: a valve body, a valve stem on the valve body, and a gate plate at the bottom end of the valve stem, and further comprising: a first component located within the gate plate; The gate is provided with a feedback cavity, and a guide post is fixedly connected to the inner wall of the gate feedback cavity. Circular grooves are provided at equal intervals on the guide post, and a sealing ring A is fitted inside the circular groove of the guide post. The gate is slidably connected to a feedback disk through a feedback cavity. The feedback disk has an annular groove, and a spring A is sleeved on the annular groove of the feedback disk. An auxiliary frame is fixedly connected to the inner wall of the gate feedback cavity, a rotating rod is rotatably connected to the inner wall of the feedback disk, and reinforcing ribs are fixedly connected at equal intervals to the inner wall of the gate cavity.

[0009] Preferably, a sliding groove is provided on the central reinforcing rib, a sliding member is slidably connected in the sliding groove, and a column is fixedly connected in the sliding member. A spring B is fixedly connected to the inner cavity of the column, and a pressure plate is fixedly connected to the spring B. A strain gauge is fixedly connected to the end of the column away from the spring B. A tension cable is fixedly connected to the end face of the pressure plate away from the spring B. The end of the tension cable away from the pressure plate is fixedly connected to the upper end of the rotating rod.

[0010] Preferably, a second component is also included; The second component is slidably connected to a safety baffle including a gate feedback cavity. The safety baffle has column holes equidistantly opened inside and an annular column groove circumferentially opened inside. The safety baffle is symmetrically and fixedly connected to an L-shaped component on its side wall, and a spring C is fixedly connected to the end face of the L-shaped component away from the safety baffle.

[0011] Preferably, the safety baffle is fixedly connected to a connecting pipe through an annular column groove, the gate is provided with a pressure relief chamber, and the other end of the connecting pipe is fixedly connected to the pressure relief chamber provided in the gate. A fixed ring is fixedly connected inside the pressure relief chamber, and a spring D is fixedly connected to the fixed ring. A sealing plate is fixedly connected to the end of the spring D away from the fixed ring, and a column is fixedly connected to the inner wall of the sealing plate.

[0012] Preferably, the feedback disk has guide holes that are adapted to the guide posts.

[0013] Preferably, the sealing rings A and B are made of nitrile rubber.

[0014] Preferably, the rotating rod is divided into two parts of different lengths, with the rotation axis of the rotating rod as the dividing point; the length L1 near the feedback disk is greater than the length L2 near the reinforcing rib.

[0015] Preferably, the column hole, the annular column groove, and the pressure relief chamber are connected.

[0016] Compared with the prior art, the present invention provides a gate valve with feedback pressure, which has the following beneficial effects: 1. The design of the first component in this invention brings the following benefits to the overall operation: Real-time pressure monitoring significantly improves pipeline system safety: Existing traditional gate valves cannot monitor pressure in real time, relying on manual inspections or post-incident troubleshooting, which leads to the failure to detect anomalies such as sudden pressure rises in a timely manner; while the first component can capture pressure changes in the pipeline in real time through strain gauges, and transmit abnormal information to the pipeline in real time through the mechanical triggering of the feedback mechanism. This can effectively avoid accidents such as pipeline cracking and media leakage caused by excessive pressure due to pump failure, misoperation or blockage. Especially in the scenario of transporting flammable, explosive or toxic media, it can reduce the risk of fire, explosion or personnel poisoning from the source; Provides accurate basis for automatic pressure relief: The design of the first component and the subsequent second component with pressure relief function can avoid the defects of the existing external safety valve with fixed opening pressure and no linkage adjustment, ensuring that the pressure relief action is only activated when the actual pressure exceeds the standard, reducing the situation of false action or no action, and further ensuring system safety; Data traceability and trend analysis facilitate system optimization and risk prediction: The first component possesses digital feedback capabilities, converting pressure data into electrical signals that can be connected to an industrial IoT system. Operators can remotely monitor the pressure status of gate valves and pipelines in real time, and combine the feedback data to precisely control the opening and closing of gate valves or adjust operating conditions, reducing on-site operation needs and improving control efficiency. Furthermore, since the pressure feedback data from the first component can be recorded and stored, potential problems in the pipeline system can be identified by analyzing historical pressure curves. For example, an increase in the frequency of pressure fluctuations may indicate pump aging or early signs of local blockage, helping companies to develop maintenance plans in advance and achieve a shift from "passively responding to failures" to "proactively preventing risks," thereby improving the stability and economy of the pipeline system.

[0017] 2. This invention, through a design using a rotating rod as a lever with L1 > L2 (i.e., the power arm is longer than the resistance arm), amplifies the pressure force borne by the feedback disc using the lever principle, resulting in the following targeted beneficial effects: Capturing low-range pressure fluctuations significantly improves monitoring sensitivity: When the pressure change in the pipeline where the valve body is located is small, the direct detection method will not be able to identify it due to the limitation of sensor accuracy; however, the lever design with L1>L2 can amplify the small pressure force on the feedback plate; the amplification factor is positively correlated with the L1 / L2 ratio, and can be adaptively set according to specific use, so that the originally weak mechanical signal is transformed into a more obvious change in displacement or force, thereby accurately capturing low-range pressure fluctuations and avoiding missed detections due to weak signals; The influence of the deformation error of the feedback disk itself is weakened, and the sources of error are reduced: When the feedback disk is subjected to pressure, it will produce a small deformation. If the deformation signal is directly detected, the small material fatigue, thermal expansion and contraction caused by temperature will directly introduce errors. However, after using a lever, the displacement signal will be amplified, and its relative error value and signal value will be significantly reduced, thereby reducing the monitoring error caused by the characteristics of the feedback disk itself. Optimize force transmission efficiency and reduce errors caused by mechanical losses: The pressure distribution on the feedback disk generally has local differences due to the uneven flow state of the medium, such as different pressures near the center and edge of the flow channel; the lever design of the rotating rod can concentrate the dispersed pressure signal on the feedback disk to the rotation axis, and amplify it through the lever arm L1>L2, so that the dispersed mechanical signal is converted into concentrated rotational power, reducing signal loss caused by uneven pressure distribution, and ensuring that the detected feedback is the overall pressure.

[0018] 3. This invention cleverly achieves the dual value of "structural reinforcement" and "functional reuse" through the design of reinforcing ribs. Compared with the traditional design that requires a separate guide rail component, it brings the following advantages: Streamlined structure and reduced number of working parts: In this design, some reinforcing ribs are used directly as guide rails for sliding parts by opening vertical grooves, eliminating the need for additional guide parts. This significantly reduces the total number of working parts, making the overall structure more compact and reducing the risk of failure due to redundant parts from the source. Enhancing structural stability and space utilization: The core function of the reinforcing rib is to strengthen the gate's strength after the inner cavity is opened, preventing the gate from deforming or being damaged under high pressure due to the hollow structure; it also serves as a guide rail for the sliding parts, which can deeply integrate the guiding function and the structural reinforcement function, thereby improving the overall structural stability.

[0019] 4. This invention, through its design that triggers automatic pressure relief of the second component when the pull cable breaks due to high pressure of the medium, precisely addresses the inherent drawbacks of existing gate valve pressure relief designs, and offers the following advantages: Eliminating reliance on manual operation and removing potential safety hazards due to delays: Most traditional gate valves in existing technologies rely on manual operation of flood discharge valves or bypass valves to reduce pressure, which requires extremely high reaction speed and skills from operators. Moreover, when pressure rises sharply, delays can easily lead to accidents such as explosions. The triggering of the second component is based entirely on the physical process of the rotating rod breaking, without the need for manual intervention. When the medium pressure exceeds the bearing limit of the tension cable, the breaking action directly drives the pressure relief mechanism to start. The response time from pressure exceeding the limit to the start of pressure relief can be greatly reduced, completely avoiding the lag of manual operation. Especially in emergency scenarios where the medium flow rate changes suddenly or the temperature rises sharply, causing a sudden increase in pressure, it can quickly reduce pressure before the equipment's tolerance limit is exceeded, fundamentally preventing serious accidents such as pipeline rupture and medium leakage. The integrated structural design solves the inherent defects of split-type pressure relief: the second component is part of the overall structure of the gate valve, eliminating the need for additional connecting pipelines and independent installation space. This avoids the installation difficulties of split designs in space-constrained scenarios, making the gate valve more suitable for dense industrial pipeline networks. Furthermore, the integrated design eliminates the connection points between the external safety valve and the gate valve body, reducing potential leakage points and preventing a decrease in pressure relief accuracy due to seal failure, ensuring that the system pressure can be accurately controlled within the safety threshold. Strengthening the coordination between pressure relief and the gate valve body improves response speed: In existing split designs, the coordination between the external safety valve and the gate valve body is poor, and there is a delay in pressure signal transmission, resulting in a lag in pressure relief response. However, the linkage between the second component and the core components such as the rotating rod and gate in the first component is a mechanical hard connection. Pressure changes are directly transmitted through the force state of the rotating rod. When the medium pressure acts on the gate, the pressure signal is transmitted in real time through the rotating rod. Once the limit value is exceeded, the pressure relief action is triggered instantly when the tension cable breaks. There is no need for complex signal conversion or cross-component transmission, which realizes "zero-delay" coordination between pressure monitoring and pressure relief execution, and solves the problem of insufficient pressure relief response speed in split designs.

[0020] 5. In the second component of this invention, the L-shaped component can be adapted and replaced with different lengths according to the specific usage environment. By changing the contact time gap between the feedback plate and the L-shaped component, it can adapt to different pressure detection requirements or pipeline pressure bearing capacity, thereby improving the practicality and flexibility of the gate valve and bringing the following benefits: Precisely adaptable to diverse pressure detection needs, improving pressure relief control accuracy: In different industrial scenarios, the properties of the media and transportation requirements vary greatly, resulting in different pressure detection threshold requirements. For example, the safe pressure range differs significantly between municipal pipelines transporting ordinary water and industrial pipelines transporting high-pressure oil. The interchangeable L-shaped element design allows for precise setting of the pressure threshold for triggering pressure relief by adjusting the contact time interval between the feedback plate and the L-shaped element. When detecting lower pressures, a shorter L-shaped element can be used, allowing the feedback plate to contact the L-shaped element earlier and trigger pressure relief. For scenarios requiring higher pressure tolerance, a longer L-shaped element can be used to extend the contact time interval, ensuring pressure relief is only initiated at higher pressures. This adjustability allows the gate valve to precisely meet the pressure detection needs of different scenarios, avoiding the drawbacks of traditional pressure relief devices with fixed thresholds and inflexible adjustments, significantly improving the accuracy of pressure relief control. Matching different pipeline pressure capacities and enhancing system compatibility: Pipelines of different materials and specifications have significantly different pressure capacities. If the gate valve's pressure relief threshold cannot match the pipeline's pressure capacity, either premature pressure relief will affect normal production, or delayed pressure relief will lead to pipeline overpressure damage. The adaptable replacement design of the L-shaped fitting allows for flexible adjustment based on the actual pressure capacity of the pipeline. For pipelines with weak pressure capacity, replacing the L-shaped fitting with an appropriate length can lower the pressure threshold for triggering pressure relief, ensuring that the pressure inside the pipeline does not exceed its tolerance limit. For pipelines with strong pressure capacity, the pressure relief threshold can be increased to fully utilize the pipeline's transport potential. This allows the gate valve to be widely adapted to various types of pipeline systems, enhancing compatibility with different pipelines and expanding its application range. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the main body of the present invention; Figure 2 These are structural diagrams of the valve body, valve stem, gate, and guide post in this invention. Figure 3 This is a front view of the gate, the first component, and the second component in this invention. Figure 4 This is a three-dimensional schematic diagram of the gate, the first component, and the second component in this invention; Figure 5 This is an exploded view of the main structure of the present invention; Figure 6 This is a diagram of the triggering structure of the first component in this invention; Figure 7 This is a structural diagram of the pressure feedback of the first component in this invention; Figure 8 This is a diagram of the triggering structure of the second component in this invention; Figure 9 This is a structural diagram of the safety baffle, column bar hole, annular column groove, and L-shaped component in this invention; Figure 10 This is a structural diagram of the gate, connecting pipe, and sealing plate in this invention; Figure 11 This is a diagram of the pressure relief structure of the second component in this invention.

[0022] In the picture: 1. Valve body; 2. Valve stem; 3. Gate; First Component: 401, Guide Post; 402, Sealing Ring A; 403, Feedback Disc; 404, Sealing Ring B; 405, Spring A; 406, Auxiliary Frame; 407, Rotating Rod; 408, Reinforcing Rib; 409, Sliding Component; 410, Column; 411, Spring B; 412, Pressure Plate; 413, Strain Gauge; 414, Tension Cable; Second component: 501, safety baffle; 502, column bar hole; 503, annular column groove; 504, L-shaped part; 505, spring C; 506, connecting pipe; 507, pressure relief chamber; 508, fixing ring; 509, spring D; 510, sealing plate; 511, column rod. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] Example: Please refer to Figures 1 to 7 As shown: To address the problems mentioned in the technical solutions, this application provides a gate valve capable of feedback pressure, comprising: a valve body 1, a valve stem 2 on the valve body 1, and a gate 3 at the bottom end of the valve stem 2, and further comprising: a first component located within the gate 3; A feedback chamber is provided inside the gate plate 3. A guide post 401 is fixedly connected to the inner wall of the feedback chamber. Circular grooves are equidistantly provided on the guide post 401, and a sealing ring A402 is fitted inside each of the circular grooves. A feedback disk 403 is slidably connected to the gate plate 3 through the feedback chamber. A spring A405 is fitted onto the circular groove of the feedback disk 403. An auxiliary frame 406 is fixedly connected to the inner wall of the feedback chamber of the gate plate 3. A rotating rod 407 is rotatably connected to the inner wall of the feedback disk 403. Reinforcing ribs 408 are equidistantly fixedly connected to the inner wall of the gate plate 3. A sliding groove is provided on the central reinforcing rib 408, and a sliding member 409 is slidably connected in the sliding groove. A column 410 is fixedly connected in the sliding member 409. A spring B411 is fixedly connected in the inner cavity of the column 410. A pressure plate 412 is fixedly connected to the spring B411. A strain gauge 413 is fixedly connected to the end of the column 410 away from the spring B411. A tension cable 414 is fixedly connected to the end face of the pressure plate 412 away from the spring B411. The end of the tension cable 414 away from the pressure plate 412 is fixedly connected to the upper end of the rotating rod 407.

[0026] in: The first component is used for water pressure monitoring and feedback within the valve body 1 to avoid serious accidents such as pipe rupture and leakage caused by failure to detect them in time, and to avoid consequences such as environmental pollution, equipment damage, or even personal injury.

[0027] Sealing rings A402 and B404 are made of nitrile rubber, which has good water resistance, oil resistance and aging resistance; the two are used to form a reliable seal to prevent water leakage.

[0028] The feedback disk 403 has guide holes that are compatible with the guide post 401.

[0029] Spring A405 can also be designed as a single spring body with an outer diameter slightly smaller than that of the feedback disc 403, depending on the application.

[0030] With the rotation axis of the rotating rod 407 as the dividing point, the rotating rod 407 is divided into two parts of different lengths; the length L1 near the feedback disk 403 is greater than the length L2 near the reinforcing rib 408.

[0031] The reinforcing rib 408 is used to strengthen the service strength when the gate 3 has an inner cavity.

[0032] When the tension cable 414 pulls the pressure plate 412, the strain gauge 413 is squeezed by the pressure plate 412, thereby providing numerical feedback to the numerical feedback display connected to the main controller via electrical connection.

[0033] A further embodiment: Please refer to Figure 3 , Figure 4 , Figures 8 to 11 As shown: The second component is slidably connected to a safety baffle 501, which includes a feedback cavity of a gate plate 3. The safety baffle 501 has equidistant column holes 502 and annular grooves 503 circumferentially arranged within it. An L-shaped member 504 is symmetrically fixedly connected to the side wall of the safety baffle 501. A spring C505 is fixedly connected to one end of the L-shaped member 504 away from the safety baffle 501. A connecting pipe 506 is fixedly connected to the safety baffle 501 through the annular grooves 503. A pressure relief cavity 507 is provided inside the gate plate 3. The other end of the connecting pipe 506 is fixedly connected to the pressure relief cavity 507 inside the gate plate 3. A fixing ring 508 is fixedly connected inside the pressure relief cavity 507. A spring D509 is fixedly connected to the fixing ring 508. A sealing plate 510 is fixedly connected to one end of the spring D509 away from the fixing ring 508. A column rod 511 is fixedly connected to the inner wall of the sealing plate 510.

[0034] in: The second component is used to passively relieve pressure when the pressure inside the pipeline is too high.

[0035] The column bar hole 502, the annular column groove 503, and the pressure relief chamber 507 are connected.

[0036] The L-shaped component 504 is used in conjunction with the feedback disc 403. When the water pressure is high, after the pull cable 414 breaks, the feedback disc 403 will push the L-shaped component 504 to initiate the initial action of water transfer.

[0037] The connecting pipe 506 connects the feedback chamber of the gate 3 with the pressure relief chamber 507.

[0038] When water enters the pressure relief chamber 507, due to the pressure difference between the left and right sides of the gate 3, the water will push against the sealing plate 510 and move to the side with lower water pressure, i.e., the pressure drop. Figure 11 The left side of the center cover 510.

[0039] The tail end of the column 511 abuts against the wall of the pressure relief chamber 507. When the water pressure on the left and right sides of the gate 3 is equal, the water on the left side of the gate 3 cannot enter the right side of the gate 3 through the pushing sealing plate 510.

[0040] It should be noted that during the design process, the feedback chamber inside the gate 3 needs to be designed according to the thickness of the gate 3 to ensure that the feedback disc 403 has sufficient stroke to sense changes in water pressure, while also ensuring that the structural strength of the gate 3 is not affected.

[0041] The working principle of all the content in the above embodiments is as follows: In the initial state: The outer wall of the feedback disc 403 is flush with the gate plate 3; spring A405 is not compressed; the rotating rod 407 does not pull the pressure plate 412 through the pull cable 414, and spring B411 is not compressed; the column hole 502 is blocked by the valve body 1; spring C505 is not compressed; the external medium does not enter the feedback cavity of the gate plate 3, and spring D509 is not stretched and is in a normal relaxed state.

[0042] The following is the working process of the first component: When in use, when the pressure in the pipeline where the valve body 1 is located increases, the external medium will push the feedback disc 403 to move into the feedback chamber opened in the gate 3. At this time, the spring A405 is compressed, and the feedback disc 403 moves stably with the assistance of the guide column 401. Furthermore, during the movement of the feedback disc 403, the feedback disc 403 will move with the rotating rod 407 rotatably connected to the inner wall. During the movement, the rotating rod 407 will rotate counterclockwise with the assistance of the rotating shaft of the auxiliary frame 406. As the rotating rod 407 rotates with the shaft, the top of the rotating rod 407 will pull the pressure plate 412 in the column cylinder 410 through the pull cable 414. At this time, due to the rotation of the rotating rod 407, its end will move vertically. During this process, the sliding piece 409 sliding in the vertical groove opened on the reinforcing rib 408 will assist in stabilizing the above movement. Furthermore, as the pressure of the medium on the feedback disc 403 increases, the tension cable 414 will gradually pull the pressure plate 412 closer to the strain gauge 413, and eventually cause the pressure plate 412 to squeeze the strain gauge 413. Under the compression, the strain gauge 413 will display the value through the numerical display electrically connected to the main controller. Relevant personnel can use this display to understand the medium pressure at the location of the gate 3 in real time. Furthermore, the first component can effectively provide feedback on the pressure at the location of the gate 3, enabling relevant personnel to perform subsequent operations in a timely manner to ensure the safety of pipeline medium transportation. Please refer to the above work process. Figures 1 to 7 .

[0043] The following is the working process of the second component: Furthermore, if the relevant personnel fail to maintain the pipeline in a timely manner, as the pressure of the medium in the pipeline gradually increases, the tension cable 414 will break due to exceeding its own load during tension. At this time, the feedback disc 403 continues to move, and then moves to the left through the L-shaped part 504, carrying the safety baffle 501. At this time, the column hole 502, which was originally blocked by the valve body 1, will be unblocked. Moreover, at this time, the feedback disc 403 can no longer obstruct the medium, and the medium will enter the feedback chamber of the gate 3. Furthermore, the medium within the feedback chamber flows into the connecting pipe 506 through the interconnected column holes 502 and annular grooves 503, and eventually transfers to the pressure relief chamber 507 of the gate 3. Once the medium reaches the pressure relief chamber 507, under the influence of the medium pressure on both sides of the gate 3, the medium pushes the sealing plate 510, transferring it to the side with lower water pressure, i.e., the side with the lower pressure. Figure 11 On the left side of the central sealing plate 510; at this time, under the action of the second component, the whole device is in a depressurized state, thereby protecting the components inside the device from damage, and avoiding accidents such as weld cracking and flange leakage in the pipeline, avoiding waste of raw materials, and preventing serious safety accidents such as fire and explosion caused by leakage of flammable and explosive media.

[0044] Please refer to the above work process. Figure 3 , Figure 4 , Figures 8 to 11 .

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gate valve capable of providing pressure feedback, comprising: The valve body (1), the valve stem (2) on the valve body (1), and the gate (3) at the bottom of the valve stem (2) are characterized in that they further include: a first component located inside the gate (3); The gate (3) has a feedback cavity, and a guide post (401) is fixedly connected to the inner wall of the feedback cavity. The guide post (401) has annular grooves at equal intervals, and a sealing ring A (402) is fitted inside the annular groove of the guide post (401). The gate (3) is slidably connected to a feedback disk (403) through a feedback cavity. An annular groove is provided on the feedback disk (403), and a spring A (405) is sleeved on the annular groove of the feedback disk (403). An auxiliary frame (406) is fixedly connected to the inner wall of the feedback cavity of the gate (3), a rotating rod (407) is rotatably connected to the inner wall of the feedback disk (403), and reinforcing ribs (408) are fixedly connected at equal intervals to the inner wall of the gate (3).

2. The gate valve with feedback pressure according to claim 1, characterized in that: A sliding groove is provided on the central reinforcing rib (408), and a sliding member (409) is slidably connected in the sliding groove. A column (410) is fixedly connected in the sliding member (409). A spring B (411) is fixedly connected to the inner cavity of the column (410), and a pressure plate (412) is fixedly connected to the spring B (411). A strain gauge (413) is fixedly connected to the end of the column (410) away from the spring B (411). A tension cable (414) is fixedly connected to the end face of the pressure plate (412) away from the spring B (411). The end of the tension cable (414) away from the pressure plate (412) is fixedly connected to the upper end of the rotating rod (407).

3. The gate valve with feedback pressure according to claim 1, characterized in that: It also includes a second component; The second component is slidably connected to a safety baffle (501) including a feedback cavity of a gate (3). The safety baffle (501) has column holes (502) equidistantly opened inside, and an annular column groove (503) is opened around the safety baffle (501). The safety baffle (501) is symmetrically fixedly connected to an L-shaped component (504) on its side wall, and a spring C (505) is fixedly connected to one end face of the L-shaped component (504) away from the safety baffle (501).

4. A gate valve capable of feedback pressure according to claim 3, characterized in that: The safety baffle (501) is fixedly connected to the connecting pipe (506) through the annular column groove (503), and the gate (3) is provided with a pressure relief chamber (507). The other end of the connecting pipe (506) is fixedly connected to the pressure relief chamber (507) provided in the gate (3). A fixed ring (508) is fixedly connected inside the pressure relief chamber (507). A spring D (509) is fixedly connected to the fixed ring (508). A sealing plate (510) is fixedly connected to one end of the spring D (509) away from the fixed ring (508). A column rod (511) is fixedly connected to the inner wall of the sealing plate (510).

5. A gate valve capable of feedback pressure according to claim 1, characterized in that: The feedback disk (403) has a guide hole that matches the guide post (401).

6. A gate valve with feedback pressure according to claim 1, characterized in that: The sealing rings A (402) and B (404) are made of nitrile rubber.

7. A gate valve capable of feedback pressure according to claim 2, characterized in that: The rotating rod (407) is divided into two parts of different lengths, with the rotation axis of the rotating rod (407) as the dividing point; the length L1 near the feedback disk (403) is greater than the length L2 near the reinforcing rib (408).

8. A gate valve with feedback pressure according to claim 4, characterized in that: The column bar hole (502), the annular column groove (503), and the pressure relief chamber (507) are connected.

Images