Adjusting steam valve capable of conveniently adjusting main steam

Abstract

The utility model relates to the field of power engineering, in particular to an adjusting steam valve facilitating adjustment of main steam. Comprising a valve body, the valve body is connected with a mounting table, the mounting table is connected with a motor, the output end of the motor is connected with a connecting rod, the connecting rod is connected with a two-way screw, the valve body is connected with a connecting plate, the two-way screw is rotationally connected with the connecting plate, the two-way screw is movably connected with a sliding seat, the sliding seat is rotationally connected with a rotating rod, and the rotating rod is rotationally connected with a valve element. The valve body is detachably connected with a filter frame, the filter frame is connected with a filter screen, the filter frame is connected with a connecting block, the connecting block is slidably connected with an inserting rod, the inserting rod is connected with a limiting block and sleeved with a spring, the two ends of the spring are connected with the connecting block and the limiting block respectively, the valve body is provided with an inserting hole, the inserting rod is matched with the inserting hole, and the inserting rod is connected with a handle. According to the utility model, impurities such as dust in gas can be effectively intercepted, blockage caused by accumulation of the impurities is prevented, smooth circulation of the gas is ensured, and normal operation is maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to power engineering field, concretely is a kind of main steam regulating valve for being convenient for adjustment. BACKGROUND

[0002] In order to improve the thermal efficiency and power generation capacity of steam turbine, the operating parameters of steam turbine are continuously improved, such as higher steam pressure, temperature and larger flow, and a main steam regulating valve for easy adjustment is needed to ensure the safe and stable operation of the steam turbine under high parameters.

[0003] Through searching, a steam turbine regulating valve is disclosed in Chinese utility model patent (publication number CN221170963U), which comprises a valve body, a mounting table, an extension pipe, a connecting seat, a sealing band, a rotating table and a driving motor and other structures. The technical solution has the advantages of simple and convenient adjustment mode, and can maintain the sealing state of the valve core for a long time under the driving of the motor, ensuring the stable operation of the regulating valve.

[0004] However, the inventor has found that the technical solution still has at least the following defects:

[0005] The existing gas valve cannot filter dust, particles and other impurities contained in the gas, which may enter the internal part of the gas valve and accumulate in the key parts such as valve core and valve seat, affecting the normal flow of gas, and even causing the gas valve to be blocked, so that the gas valve cannot be normally opened or closed, thereby affecting the operation of the whole system. UTILITY MODEL CONTENT

[0006] The utility model intends to provide a main steam regulating valve for easy adjustment to solve the problems raised in the above background technology.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] A main steam regulating valve for easy adjustment comprises a valve body, a mounting table connected to the valve body, a motor connected to the mounting table, a connecting rod connected to the output end of the motor, a bidirectional screw rod connected to the connecting rod, a connecting plate connected to the valve body, the bidirectional screw rod being rotatably connected to the connecting plate, a sliding seat movably connected to the bidirectional screw rod, a rotating rod rotatably connected to the sliding seat, a valve core rotatably connected to the rotating rod, a filter frame detachably connected to the valve body, a filter screen connected to the filter frame, a connecting block connected to the filter frame, a plug rod slidably connected to the connecting block, a limiting block connected to the plug rod, a spring sleeved on the plug rod, the two ends of the spring being connected to the connecting block and the limiting block respectively, a plug hole formed in the valve body, the plug rod and the plug hole being matched with each other, and a handle connected to the plug rod.

[0009] Preferably, the valve core is connected with a limiting rod, the limiting rod is slidingly connected with a sleeve, the sleeve is connected with a fixing base, the bidirectional screw rod passes through the fixing base, the limiting rod is connected with a T-shaped block, the sleeve is provided with a T-shaped groove, and the T-shaped block is slidingly connected with the T-shaped groove.

[0010] Preferably, the valve body is provided with a thread.

[0011] Preferably, the valve body is connected with a first sealing ring.

[0012] Preferably, the connecting block is connected with a second sealing ring, and the inserting rod is slidingly connected with the second sealing ring.

[0013] Preferably, the valve body is connected with a sealing band, and the valve core cooperates with the sealing band.

[0014] Compared with the prior art, the technical scheme has the advantages that:

[0015] (1) The filter frame and the filter screen are arranged, so that dust, particles and other impurities in the gas can be effectively intercepted, the impurities can be prevented from entering the gas valve and downstream equipment, the blockage of components such as the gas valve, the pipeline and the nozzle caused by the accumulation of impurities can be prevented, the smooth flow of the gas can be ensured, and the normal operation of the system can be maintained. After the impurities are filtered out, the friction between the particles in the gas and the valve core, the valve seat and other internal moving parts of the equipment can be greatly reduced, the degree of wear can be reduced, the service life of the gas valve and related equipment can be prolonged, and the stability of the equipment performance can be ensured. The filter frame can be disassembled through the arrangement of the connecting block, the inserting rod, the limiting block, the spring, the insertion hole and the handle, so that the staff can conveniently take down the filter frame from the equipment, and the filter frame can be completely cleaned without difficult cleaning operation in situ, the dust, impurities and the like accumulated on the filter screen can be more easily removed, the cleaning efficiency can be improved, and the filtering effect can be ensured.

[0016] (2) The sleeve, the fixing base and the limiting rod are arranged, so that the movement track of the valve core can be accurately limited, the valve core can only move in the axial direction, the correct relative position between the valve core and the valve seat during the opening and closing process can be ensured, good sealing cooperation can be achieved, and gas leakage can be effectively prevented. The T-shaped block and the T-shaped groove are arranged, so that the movement of the sleeve and the limiting rod can be accurately guided, the sleeve and the limiting rod can strictly move in a straight line according to the predetermined direction, and left and right deviation or shaking during the movement can be avoided, so that the movement accuracy of the whole system is improved.

[0017] (3) By setting the thread, the valve body and other pipelines, equipment can provide clear positioning and guide, through the rotation can realize the connection, without additional complex positioning tool or operation, greatly improve the installation efficiency, save the installation time and labor cost. And threaded connection can provide reliable mechanical fastening force, so that the valve body and pipeline or equipment form a tight connection. In the pipeline system running process, the thread can effectively resist the pressure of fluid, vibration and other external force, prevent the valve body and connecting parts loose or fall off, ensure the stability and safety of the whole system.

[0018] (4) By setting the first sealing ring, prevent gas leakage, can ensure the control accuracy of steam valve on steam flow, make the steam valve accurately adjust the steam flow according to the set opening, protect the stable operation of the unit. Can prevent the pressure fluctuation caused by steam leakage, ensure the steam pressure of upstream and downstream of the steam valve stable in the design range, provide protection for the stable operation of the whole steam system.

[0019] (5) By setting the second sealing ring, avoid gas into the connecting block to affect the spring, can effectively block these corrosive gas, make the spring keep the original mechanical properties, prolong the service life of the spring.

[0020] (6) By setting the sealing band, an additional sealing structure is formed, which can effectively fill the small gap between the valve core and the valve body, further prevent gas leakage, ensure the reliability of the seal, for example, in some high pressure steam system, the leakage can be reduced to a very low level. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a front view of the utility model;

[0022] Figure 2 is Figure 1 the enlarged view of A;

[0023] Figure 3 is Figure 1 the enlarged view of B;

[0024] Fig. 1 is a front view of the utility model; DETAILED DESCRIPTION

[0025] The utility model will be explained in further detail below in combination with the drawings and embodiments:

[0026] As Figures 1-3The utility model provides a kind of main steam regulating valve for facilitating adjustment, including valve body 1, the top of valve body 1 is connected with installation platform 8, the top of installation platform 8 is connected with motor 6, the output end of motor 6 is connected with connecting rod 7, the bottom of connecting rod 7 is connected with two-way screw rod 15, due to the special screw thread 11 structure of two-way screw rod 15, two sliding seats 13 will be moved in opposite or opposite direction along the axial direction of two-way screw rod 15. The inner wall bottom of valve body 1 is connected with connecting plate 14, the bottom of two-way screw rod 15 is rotatably connected with the top of connecting plate 14, the upper and lower ends of two-way screw rod 15 are movably connected with sliding seat 13 respectively, the left and right ends of two sliding seats 13 are rotatably connected with rotating rod 12 respectively, every two adjacent rotating rods 12 are rotatably connected with valve core 5, so that the linear motion of sliding seat 13 can be converted into the rotation of valve core 5 by rotating rod 12, to realize the adjustment of the opening angle of valve core 5, to control the flow and pressure of steam. When the flow and pressure of main steam need to be adjusted, start motor 6. Motor 6 drives two-way screw rod 15 to rotate by connecting rod 7, due to the special screw thread 11 structure of two-way screw rod 15, two sliding seats 13 will be moved in opposite or opposite direction along the axial direction of two-way screw rod 15. The linear motion of sliding seat 13 is converted into the rotation of valve core 5 by rotating rod 12 rotatably connected with it, to change the opening angle of valve core 5. If you want to increase the flow and pressure of steam, the opening of valve core 5 can be increased, otherwise, the opening of valve core 5 can be reduced. The left and right ends of valve body 1 are respectively detachably connected with filter frame 3, the inner walls of two filter frames 3 are connected with filter screen 10, before steam enters valve body 1, it passes through filter screen 10 in filter frame 3 first. Filter screen 10 can intercept impurities, particles and the like in steam, to prevent them from entering valve body 1, to avoid causing wear and blockage to valve core 5, valve seat and other components, to ensure the normal work and adjustment accuracy of steam valve. The upper and lower ends of two filter frames 3 are respectively connected with connecting block 26, the inner walls of each connecting block 26 are slidably connected with plug rod 24, each plug rod 24 is connected with limit block 25, each plug rod 24 is sleeved with spring 21, the two ends of each spring 21 are respectively connected with corresponding connecting block 26 and limit block 25, valve body 1 is provided with plug hole 23 corresponding to plug rod 24, each plug rod 24 is respectively matched with corresponding plug hole 23, and each plug rod 24 is respectively connected with handle 22. When filter frame 3 is disassembled, pull handle 22 to make plug rod 24 pull out of plug hole 23, at this time, spring 21 is compressed, so that filter frame 3 can be removed for cleaning or replacement. When installing, plug rod 24 is inserted into plug hole 23, and is fixed by the elastic force of spring 21. The opposite sides of two valve cores 5 are respectively connected with limit rod 17, the outer walls of two limit rods 17 are slidably connected with sleeve 16, two sleeves 16 are commonly connected with fixing seat 9, two-way screw rod 15 passes through fixing seat 9, to ensure that valve core 5 can only move along the axial direction of limit rod 17, to avoid the deviation and shaking of valve core 5 during movement, to improve the sealing effect between valve core 5 and valve seat.Two TT blocks 18 are connected to the outer wall of the two limiting rods 17 respectively, and two TT grooves 19 corresponding to the TT blocks 18 are formed in the two sleeves 16 respectively, and each TT block 18 is in sliding connection with the corresponding TT groove 19. This structure further enhances the stability of the limiting rod 17 when moving in the sleeve 16, prevents the limiting rod 17 from rotating or deviating during movement, and ensures the accuracy and reliability of the movement of the valve core 5.

[0027] As shown in Figure 1 , the valve body 1 is provided with threads 11 at both ends. The first sealing ring 2 is connected to the valve body 1 at both ends. The sealing performance of the connection part between the valve body 1 and the external pipeline is greatly improved, preventing steam leakage at the connection part. In the high-temperature and high-pressure steam environment, the first sealing ring 2 can withstand large pressure and temperature changes, always maintaining good sealing effect, ensuring the safe and stable operation of the steam system.

[0028] As shown in Figure 2 , the outer wall of each connecting block 26 is connected with a second sealing ring 20, and each insertion rod 24 is in sliding connection with the corresponding second sealing ring 20. Its main function is to prevent gas from seeping into the connecting block 26 through the gap between the connecting block 26 and the insertion rod 24, avoiding erosion or affecting the performance of the internal spring 21 and other components, ensuring the reliability and stability of the detachable structure of the filter frame 3.

[0029] As shown in Figure 1 , the valve body 1 is connected with a sealing band 4 at both ends, and the valve core 5 cooperates with the sealing band 4. When the valve core 5 is closed, the sealing band 4 can fill the small gap between the valve core 5 and the valve body 1, further enhancing the sealing effect and preventing steam leakage. The sealing band 4 has certain elasticity and flexibility, which can adapt to the movement and deformation of the valve core 5 under different working conditions, and always maintains good sealing performance.

[0030] The specific implementation process is as follows:

[0031] When the main steam flow and pressure need to be adjusted, the motor 6 is started. The motor 6 drives the bidirectional screw 15 to rotate through the connecting rod 7, so that the two sliding seats 13 move axially relative to or opposite to each other along the bidirectional screw 15. The sliding seat 13 moves through the rotating rod 12 to drive the valve core 5 to rotate, changing the opening angle of the valve core 5. To increase the steam flow and pressure, increase the opening of the valve core 5; otherwise, decrease it.

[0032] When disassembling the filter frame 3, pull the handle 22 to pull out the insertion rod 24 from the insertion hole 23, at this time the spring 21 is compressed, and the filter frame 3 can be removed for cleaning or replacement. When installing, align the insertion rod 24 with the insertion hole 23 and insert it, and fix it by the elastic force of the spring 21.

[0033] The above only is the embodiment of the present application, and the well-known specific technical solutions and / or common knowledge in the scheme are not described in detail. It should be pointed out that, for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope claimed in the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A main steam regulating valve for facilitating adjustment, characterized by: The utility model provides a valve, including valve body (1), valve body (1) is connected with installation platform (8), installation platform (8) is connected with motor (6), motor (6) output is connected with connecting rod (7), connecting rod (7) is connected with two -way screw rod (15), valve body (1) is connected with connecting plate (14), two -way screw rod (15) is connected with connecting plate (14) rotationally, two -way screw rod (15) is movably connected with sliding seat (13), sliding seat (13) is rotatably connected with rotary rod (12), rotary rod (12) is rotatably connected with valve core (5), valve body (1) is detachably connected with filter frame (3), filter frame (3) is connected with filter screen (10), filter frame (3) is connected with connecting block (26), connecting block (26) is slidably connected with plug rod (24), plug rod (24) is connected with limit block (25), plug rod (24) is equipped with spring (21), spring (21) both ends are connected with connecting block (26) and limit block (25) respectively, valve body (1) is set up with the plug hole (23), plug rod (24) and plug hole (23) are mutually matched, plug rod (24) is connected with handle (22).

2. A main steam regulating valve for facilitating adjustment as defined in claim 1, characterized in that: Valve core (5) is connected with limit rod (17), limit rod (17) is slidably connected with sleeve (16), sleeve (16) is connected with fixed base (9), two -way screw rod (15) passes through fixed base (9), limit rod (17) is connected with T -shaped block (18), sleeve (16) is set up with T -shaped groove (19), T -shaped block (18) is slidably connected with T -shaped groove (19).

3. A main steam regulating valve for facilitating adjustment as defined in claim 1, wherein: Valve body (1) is set up with screw thread (11).

4. The main steam regulating valve as described in claim 1, characterized in that: Valve body (1) is connected with first sealing ring (2).

5. The main steam regulating valve as described in claim 1, characterized in that: Connecting block (26) is connected with second sealing ring (20), plug rod (24) is slidably connected with second sealing ring (20).

6. The main steam regulating valve as described in claim 1, characterized in that: Valve body (1) is connected with sealing band (4), valve core (5) and sealing band (4) are mutually matched.

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