High-temperature and high-pressure gate valve

Abstract

A high-temperature and high-pressure gate valve comprises a valve body and a valve rod, a gate plate frame is arranged at the end of the valve rod, a parallel double-gate-plate structure is connected to the gate plate frame, an elastic piece used for pre-tightening is horizontally arranged between a left gate plate and a right gate plate, and a sufficient first gap for high-temperature expansion and compression is further formed between the left gate plate and the right gate plate. The left flashboard and the right flashboard are respectively provided with a long boss structure, the long boss structures are clamped into inner hole grooves of the flashboard frame, axial force borne by the left flashboard and the right flashboard from the valve rod is transmitted through the long bosses, horizontal component force of the left flashboard and the right flashboard is almost no or extremely small, and failure caused by overload extrusion to the limiting cam in the opening and closing process is avoided. The parallel double-gate-plate structural design is adopted, due to the fact that no wedge is formed, when the valve rod extends at high temperature, the phenomenon that the valve rod abuts against a gate plate assembly to cause jamming is avoided, the double gate plates are pre-tightened in the horizontal direction through the two sets of springs arranged between the left gate plate and the right gate plate, and enough high-temperature expansion compression space is reserved; and it is ensured that the jamming phenomenon cannot occur under the condition of the limiting temperature.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a high temperature and high pressure gate valve. BACKGROUND

[0002] Now high temperature and high pressure gate valve is easy to appear the situation of being stuck, the reason of high temperature being stuck is that the traditional gate valve is wedge type, the gate board form is elastic board or wedge type double gate board but when using on the pipeline of high temperature or temperature fluctuation is bigger, it is easy to appear the phenomenon of being stuck, the reason is that each part is not uniform when high temperature expansion expansion, the internal part is high in the valve body and expansion is big and is easy to lead to the gate board wedge block, the valve rod high temperature elongation also can lead to the gate board block, the electric actuator limit installation precision problem also is easy to lead to the block. These situations appear and lead to the over torque to be applied to the gate board, make the sealing surface under high temperature to receive the pressure intensity that exceeds the material performance, this is to open the valve to apply the overload external force also leads to the damage of the sealing surface, so for the high temperature and high pressure gate valve, the high temperature and high pressure gate valve needs to carry out the innovative design on the structure.

[0003] And, the common problem of the gate valve with double gate board structure is that the assembly is much, the structure is complex, is easy to appear the phenomenon of falling off in the process of using, the assembly falls off and the serious safety accident appears, so the limit design of the gate board is very important. Guarantee the limiting piece is not forced in the process of opening and closing of the valve with pressure difference, just force the gate board after the gate board separates the sealing effect, at this moment only the gravity of the gate board, just not easy to appear the overload situation and break the gate board limiting mechanism and lead to the gate board assembly falling off accident. SUMMARY

[0004] In order to solve the technical defects existing in the prior art, the utility model provides a high temperature and high pressure gate valve.

[0005] The utility model discloses a technical scheme that is adopted: high temperature and high pressure gate valve, including the valve body, the valve rod, the end of valve rod is equipped with the gate board frame, the gate board frame is connected with the parallel double gate board structure that is composed of left gate board and right gate board, the left gate board and right gate board of parallel double gate board structure are provided with a plurality of elastic pieces for pre -tightening between horizontal, the left gate board and right gate board still have enough high temperature expansion compression first gap between, the left gate board and right gate board all have long boss structure on, the long boss structure is clamped into the inner hole recess of gate board frame, the left gate board and right gate board are subjected to the axial force of valve rod and are transmitted through this long boss structure, make the horizontal component force of left gate board and right gate board almost have or be very small.

[0006] The outer circumference of left gate board and right gate board is equipped with the annular clamping groove, the gate board frame is connected with the stud, the stud is equipped with the limit cam, the limit cam rotates into the limit clamping groove of left gate board and right gate board and is limited with the limit clamping groove.

[0007] The two sides of the limiting cam are also provided with spring pads and nuts, the nuts lock the limiting cam and the spring pads, and finally the threaded parts are spot-welded, so that the nut, the limiting cam and the spring pad assembly cannot be loosened under vibration.

[0008] The valve rod and the gate frame are connected through a pin shaft.

[0009] The gate frame and the left gate plate and the right gate plate are also provided with a second gap.

[0010] The valve body is also provided with a valve cover, a sealing ring is arranged between the valve cover and the valve body, and the sealing ring and the valve cover are wedge-surface matched.

[0011] The sealing ring is provided with a gasket ring, the gasket ring is also provided with a four-open ring, the four-open ring is limit-matched between the valve body side wall, the sealing ring, the gasket ring and the four-open ring form a self-sealing structure, and the sealing reliability under high temperature and high pressure is ensured.

[0012] The valve cover is also provided with a packing box, the packing box is designed to be higher, and the packing box is also provided with cooling fins.

[0013] The valve body is integrally forged.

[0014] The elastic members are arranged on the left gate plate and the right gate plate in a staggered manner.

[0015] The utility model discloses a high temperature and high pressure gate valve, including valve body, valve rod, the end of valve rod is equipped with gate frame, the gate frame is connected with the parallel double gate plate structure that is composed of left gate plate and right gate plate, the left gate plate and right gate plate of parallel double gate plate structure are horizontally provided with a plurality of elastic members for pre-tightening between, left gate plate and right gate plate still have enough high temperature expansion compression's first gap, left gate plate and right gate plate all have long boss structure on, long boss structure is clamped into the inner hole recess of gate frame, left gate plate and right gate plate receive the axial force of valve rod and pass this long boss transmission, make left gate plate and right gate plate's horizontal component of force almost have nothing or be extremely small, avoid the overload extrusion of limiting cam during switching process and lead to failure, adopt parallel double gate plate structure design, because of no wedge, valve rod high temperature elongation will not dead block gate plate assembly and lead to jamming phenomenon, and the two groups of springs arranged between left and right gate plates are used for pre-tightening in the horizontal direction of the double gate plate, and enough high temperature expansion compression space is reserved, guarantee that there is also no jamming phenomenon under the condition of extreme temperature. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of the utility model.

[0017] Figure 2The structure of the I place is enlarged.

[0018] Figure 3 The right view of the gate frame and the gate plate combined structure of the utility model.

[0019] Figure 4 The plan view of the gate frame and the gate plate combined structure of the utility model.

[0020] Figure 5 The plan view of the gate structure of the utility model.

[0021] Wherein 1-valve body, 2-valve stem, 3-gate frame, 4-left gate plate, 5-right gate plate, 6-pin shaft, 7-second gap, 8-valve cover, 31-stud, 32-limit cam, 33-spring pad, 34-nut, 51-first gap, 52-long boss structure, 53-clamping groove, 54-elastic member, 81-seal ring, 82-pad ring, 83-four open ring, 84-stuffing box, 85-radiator fin. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] High temperature and high pressure gate valve, including valve body 1, valve stem 2, its characterized in that, the end of the valve stem 2 is equipped with gate frame 3, the valve stem 2 is connected with gate frame 3 through pin shaft 6.The gate frame 3 is connected with parallel double gate plate structure composed of left gate plate 4 and right gate plate 5, the left gate plate 4 and right gate plate 5 of parallel double gate plate structure are provided with a plurality of elastic members 54 for pre-tightening horizontally, a plurality of elastic members are staggered on the left gate plate 4 and right gate plate 5.The left gate plate 4 and right gate plate 5 also have first gap 51 with enough high temperature expansion compression, the left gate plate 4 and right gate plate 5 are all provided with long boss structure 52, the long boss structure 52 is clamped into the inner hole groove of gate frame 3, the left gate plate 4 and right gate plate 5 are subjected to the axial force of valve stem 2 and are transmitted through the long boss structure, so that the horizontal component force of left gate plate 4 and right gate plate 5 is almost none or very small, avoiding the overload extrusion of limit cam in the opening and closing process, which leads to failure.The outer circumference of left gate plate 4 and right gate plate 5 is equipped with annular clamping groove 53, the gate frame 3 is connected with stud 31 in four uniform directions, the stud 31 is equipped with limit cam 32, the limit cam 32 is rotated into the limit clamping groove 53 of left gate plate 4 and right gate plate 5 and is limitedly matched with limit clamping groove 53.After installing left and right gate plates into the slot of gate frame, the spring installed in the two gate frames is compressed by external force, and the limit cam is rotated into the limit clamping groove of the gate plate.The utility model adopts parallel double gate plate structure design, because there is no wedge, the valve stem high temperature elongation will not dead-end the gate plate assembly and cause jamming phenomenon, the double gate plate is pre-tightened by two groups of springs arranged between left and right gate plates in horizontal direction, and enough high temperature expansion compression space is reserved, which ensures that jamming phenomenon will not occur under extreme temperature.

[0024] The two sides of the limit cam 32 are also equipped with spring pad 33 and nut 34, the nut 34 locks the limit cam 32 and spring pad 33 and finally spot welds the threaded part, which ensures that the nut 34, limit cam 32 and spring pad 33 assembly will not loosen under vibration.

[0025] The gate frame 3 and left gate plate 4 and right gate plate 5 also have second gap 7.

[0026] The valve body 1 is also equipped with valve cover 8, the valve cover 8 and valve body 1 are also equipped with sealing ring 81, the sealing ring 81 and valve cover 8 are wedge surface matched.The sealing ring 81 is equipped with gasket ring 82, the gasket ring 82 is also equipped with four open ring 83, the four open ring 83 and the side wall of valve body 1 are limitedly matched, the sealing ring 81, gasket ring 82 and four open ring 83 form self-sealing structure, which ensures the sealing reliability under high temperature and high pressure, and medium leakage will not occur.

[0027] The valve cover 8 is further provided with a packing gland 84, the packing gland 84 is high, the packing gland 84 is further provided with a fin 85, to ensure that the temperature of packing is in the range of bearing.

[0028] The valve body 1 is integrally forged, to ensure the sufficient strength of the valve body, by selecting different high-temperature and high-pressure resistant materials, the valve is suitable for the steam pipeline of supercritical and ultra-supercritical generator set.

[0029] Skilled persons should know: although the utility model has been described according to the above specific implementation, the utility model idea of the utility model is not limited to this utility model, and any modification using the utility model idea will be included in the patent protection range of the patent.

[0030] The above is only the preferred embodiment of the utility model, the protection scope of the utility model is not only limited to the above embodiment, and any technical scheme under the idea of the utility model belongs to the protection scope of the utility model. It should be pointed out that, for ordinary skilled persons in the art, some improvements and decorations without departing from the principle of the utility model are also regarded as the protection scope of the utility model.

Claims

1. A high temperature and high pressure gate valve comprising a valve body (1), a valve stem (2), characterized in that, The end of the valve stem (2) is provided with a shutter frame (3), the shutter frame (3) is connected with parallel double shutter structure composed of left shutter (4) and right shutter (5), a plurality of elastic members (54) for pre-tightening are horizontally arranged between the left shutter (4) and the right shutter (5) of the parallel double shutter structure, the left shutter (4) and the right shutter (5) also have a first gap (51) for high-temperature expansion compression, the left shutter (4) and the right shutter (5) are provided with long boss structures (52), the long boss structures (52) are clamped into the inner hole grooves of the shutter frame (3), the left shutter (4) and the right shutter (5) are subjected to the axial force of the valve stem (2) and the axial force is transmitted through the long boss structures, so that the horizontal component force of the left shutter (4) and the right shutter (5) is almost zero or very small.

2. The high-temperature, high-pressure gate valve of claim 1, wherein, The outer circumferences of the left shutter (4) and the right shutter (5) are provided with annular clamping grooves (53), the shutter frame (3) is connected with studs (31), the studs (31) are provided with limit cams (32), the limit cams (32) are rotated into the limit clamping grooves (53) of the left shutter (4) and the right shutter (5) and are limitedly matched with the limit clamping grooves (53).

3. The high-temperature, high-pressure gate valve of claim 2, wherein, The two sides of the limit cam (32) are also provided with spring pads (33) and nuts (34), the nuts (34) lock the limit cam (32) and the spring pad (33) and finally spot weld the threaded part, so that the nut (34), the limit cam (32) and the spring pad (33) assembly cannot be loosened under vibration.

4. The high-temperature, high-pressure gate valve of claim 1, wherein, The valve stem (2) and the shutter frame (3) are connected through a pin shaft (6).

5. The high-temperature, high-pressure gate valve of claim 1, wherein, The shutter frame (3) and the left shutter (4) and the right shutter (5) also have a second gap (7).

6. The high-temperature, high-pressure gate valve of claim 1, wherein, The valve body (1) is also provided with a valve cover (8), the valve cover (8) and the valve body (1) are also provided with a sealing ring (81), the sealing ring (81) and the valve cover (8) are wedge surface matched.

7. The high-temperature, high-pressure gate valve of claim 6, wherein, The sealing ring (81) is provided with a gasket ring (82), the gasket ring (82) is also provided with a four-open ring (83), the four-open ring (83) and the side wall of the valve body (1) are limitedly matched, the sealing ring (81), the gasket ring (82) and the four-open ring (83) form a self-sealing structure, which ensures the sealing reliability under high temperature and high pressure.

8. The high-temperature, high-pressure gate valve of claim 6, wherein, The valve cover (8) is also provided with a packing box (84), the packing box (84) is designed to be higher, and the packing box (84) also has a cooling fin (85).

9. The high-temperature, high-pressure gate valve of claim 1, wherein, The valve body (1) is integrally forged.

10. The high-temperature, high-pressure gate valve of claim 1, wherein, A plurality of elastic members are arranged on the left shutter (4) and the right shutter (5) in a staggered manner.

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