CN220749069U - Combined driving mechanism and 25000PSI ultra-high pressure manual flat valve - Google Patents

Abstract

The utility model relates to the technical field of flat valves, in particular to a composite driving mechanism and a 25000PSI ultra-high pressure manual flat valve. The compound driving mechanism comprises a labor-saving component, a driving component, an executing component and a connecting component, wherein the driving component is arranged outside the upper end of the protecting cover, the executing component is arranged outside the inner end of the driving component, and the connecting component is arranged at the lower part of the executing component; in actual use, through the connection of driven gear and driving gear, make operating personnel only need rotate the handle, alright drive driven gear and rotate, afterwards alright go up and down to coupling assembling, and driving gear is less than driven gear, consequently can save more laborsaving, make things convenient for operating personnel's operation.

Description

Combined driving mechanism and 25000PSI ultra-high pressure manual flat valve

Technical Field

The utility model relates to the technical field of flat valves, in particular to a composite driving mechanism and a 25000PSI ultra-high pressure manual flat valve.

Background

In order to further realize the national energy policy, the oil and gas exploration and development force is continuously improved, and more risk exploratory wells such as ultra-deep wells are deployed in the future in China. These wells have the characteristics of deep burial, high pressure coefficient, high single well design yield, high wellhead fluid temperature, etc., even when the well completion depth exceeds 10000 meters, the formation pressure reaches 175MPa, the formation temperature exceeds 121 ℃, and the expected well closing pressure exceeds 135 MPa. The 25000PSI ultra-high pressure manual flat valve is the most critical well control component in gas production wellhead equipment.

At present, in order to ensure tightness, the number of buckles among threads is more, so that larger force is needed to be used in the screwing process, the manual plate valve in gas production wellhead equipment used in China can bear 140MPa at most, meanwhile, the fracturing working conditions of ultrahigh pressure, multistage number, high sand content and acid content are gradually increased, the internal and external sealing failure of the manual plate valve is easily caused, and well control risks are easily caused.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the utility model, which should not be used to limit the scope of the utility model.

The present utility model has been made in view of the above-mentioned problems or the problems of the prior art that the use of the flat valve is laborious in the ultra-high pressure environment.

It is therefore an object of the present utility model to provide a compound drive mechanism.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a combined type actuating mechanism, includes laborsaving part, it includes the protection casing, sets up the outside actuating assembly of protection casing upper end, set up actuating assembly in the inner outside of actuating assembly, and set up actuating assembly lower part's coupling assembling.

As a preferred embodiment of the compound drive mechanism of the present utility model, wherein: the driving assembly comprises a rotating handle and a driving gear arranged on the outer end surface of the rotating handle;

wherein, the driving gear and the rotating handle are of a welding integrated structure.

As a preferred embodiment of the compound drive mechanism of the present utility model, wherein: the execution assembly comprises a driven gear, a limiting block arranged on the surface of the upper end of the middle part of the driven gear, a screw rod arranged at the lower end of the middle part of the driven gear, a supporting plate arranged at the bottom of the lower end of the screw rod, and a rotating seat arranged at the joint of the screw rod and the supporting plate;

the driven gear is meshed with the driving gear, the limiting block is embedded into the protective cover, the outer side of the supporting plate is fixedly connected with the protective cover, and the bottom of the lower end of the screw rod is inserted into the rotary seat.

As a preferred embodiment of the compound drive mechanism of the present utility model, wherein: the connecting assembly comprises a lifting block, four groups of connecting rods which are arranged on the lower end face of the lifting block at equal intervals, a mounting plate which is arranged at the bottom of the lower side of the connecting rod, a clamping plate which is arranged on the lower end face of the mounting plate, and fixing holes which are arranged on the surface of the clamping plate;

the lifting block comprises a block body, a spiral groove arranged in the block body, and a plurality of balls arranged in the spiral groove;

the middle part of the connecting rod penetrates through the through holes on the four end surfaces of the supporting plate, two groups of fixing holes on the surface of the clamping plate are leveled, and fixing pins are arranged in the fixing holes.

The composite driving mechanism has the beneficial effects that: in actual use, through the connection of driven gear and driving gear, make operating personnel only need rotate the handle, alright drive driven gear and rotate, afterwards alright go up and down to coupling assembling, and driving gear is less than driven gear, consequently can save more laborsaving, make things convenient for operating personnel's operation.

In view of the fact that in the actual use process, the problem that the flat valve is prone to sealing failure exists.

It is therefore another object of the present utility model to provide a 25000PSI ultra high pressure manual flat valve.

In order to solve the technical problems, the utility model also provides the following technical scheme: the 25000PSI ultra-high pressure manual flat valve comprises a composite driving mechanism, a valve body, a first mounting mechanism arranged on the upper side of the valve body, a second mounting mechanism arranged on the lower side of the valve body, and a fixing assembly arranged on the lower part of the second mounting mechanism;

the valve body is in sealing connection with the first installation mechanism and the valve body is in sealing connection with the second installation mechanism through fixing bolts.

As a preferred embodiment of the 25000PSI ultra-high pressure manual plate valve of the present utility model, wherein: the valve body comprises a frame body, sealing gasket rings arranged at the upper end and the lower end of the frame body, a liquid inlet pipe arranged in the middle of the left side of the frame body, and a liquid outlet pipe arranged in the middle of the right side of the frame body;

the sealing gasket ring at the upper end is positioned at the joint of the frame body and the first mounting mechanism, and the sealing gasket ring at the lower end is positioned at the joint of the frame body and the second mounting mechanism.

As a preferred embodiment of the 25000PSI ultra-high pressure manual plate valve of the present utility model, wherein: the valve body further comprises a blocking assembly and a valve seat arranged outside the blocking assembly;

the blocking assembly comprises a valve plate, a flow hole reserved on the upper surface of the valve plate, a first mounting block arranged at the top of the upper end of the valve plate, and a second mounting block arranged at the bottom of the lower end of the valve plate;

wherein, the sealing surfaces of the valve seat and the valve plate adopt a supersonic tungsten carbide spraying process.

As a preferred embodiment of the 25000PSI ultra-high pressure manual plate valve of the present utility model, wherein: the first mounting mechanism comprises an upper mounting frame, a valve rod arranged in the upper mounting frame, and a first sealing filler arranged between the upper mounting frame and the valve rod;

the lower end of the valve rod is connected with the upper side of the blocking assembly, and the upper end of the valve rod is connected with the labor-saving component.

As a preferred embodiment of the 25000PSI ultra-high pressure manual plate valve of the present utility model, wherein: the second mounting mechanism comprises a lower end mounting frame, a tail rod arranged in the lower end mounting frame, and a second sealing filler arranged between the lower end mounting frame and the tail rod;

wherein, the upper end of tail boom and the downside of blocking the subassembly interconnect.

As a preferred embodiment of the 25000PSI ultra-high pressure manual plate valve of the present utility model, wherein: the fixing component comprises a tail cover and a gland arranged in the tail cover;

wherein, the inboard upper end of gland and tail rod interconnect.

The 25000PSI ultra-high pressure manual flat valve has the beneficial effects that: the first sealing filler and the second sealing filler are mainly made of polytetrafluoroethylene, PEEK and alloy springs, have high-pressure resistance, high temperature resistance and high corrosion resistance, the working pressure can reach 37500PSI, the allowable working temperature can reach-70 ℃ to 200 ℃, the valve seat position adopts a double PEEK ring design, the sealing rings of the inner valve seat and the outer valve seat are provided with high-quality sealing stability, the sealing rings have a certain sand prevention function, and the surface hardness and the corrosion resistance of the sealing surfaces of the valve seat and the valve plate are improved through a supersonic tungsten carbide spraying process between the valve seat and the valve plate, so that the sealing performance of the whole interior is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is an overall schematic of the present utility model.

Fig. 2 is a schematic overall cross-sectional view of the present utility model.

Fig. 3 is a schematic view of the internal perspective structure of the labor-saving component of the utility model.

FIG. 4 is a schematic view of a connecting assembly according to the present utility model;

FIG. 5 is a schematic cross-sectional view of a labor-saving component of the present utility model;

FIG. 6 is a schematic cross-sectional view of a flat valve according to the present utility model;

FIG. 7 is a schematic view of a blocking assembly according to the present utility model.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 5, for a first embodiment of the present utility model, there is provided a compound drive mechanism including a labor saving member 100 including a shield 101, a drive assembly 102 provided outside an upper end of the shield 101, an actuating assembly 103 provided outside an inner end of the drive assembly 102, and a connection assembly 104 provided at a lower portion of the actuating assembly 103.

Further, the driving assembly 102 includes a handle 102a, and a driving gear 102b provided at an outer end surface of the handle 102 a;

wherein, the driving gear 102b and the rotary handle 102a are in a welding integrated structure;

by rotating the knob 102a, the driving gear 102b can be rotated.

Further, the executing assembly 103 comprises a driven gear 103a, a limiting block 103b arranged on the upper end surface of the middle part of the driven gear 103a, a screw rod 103c arranged on the lower end of the middle part of the driven gear 103a, a supporting plate 103d arranged at the bottom of the lower end of the screw rod 103c, and a rotating seat 103e arranged at the joint of the screw rod 103c and the supporting plate 103 d;

the driven gear 103a and the driving gear 102b are in meshed connection, the limiting block 103b is embedded in the protective cover 101, the outer side of the supporting plate 103d is fixedly connected with the protective cover 101, and the bottom of the lower end of the screw rod 103c is inserted in the rotating seat 103e;

the rotation of the driving gear 102b can drive the driven gear 103a to rotate, so as to drive the screw rod 103c to rotate, and the position of the driven gear 103a can be fixed by using the limiting block 103 b.

Further, the connection assembly 104 includes a lifting block 104a, four groups of connection rods 104b arranged at equal intervals on the lower end surface of the lifting block 104a, a mounting plate 104c arranged at the bottom of the lower side of the connection rods 104b, a clamping plate 104d arranged on the lower end surface of the mounting plate 104c, and a fixing hole 104e arranged on the surface of the clamping plate 104 d;

the lifting block 104a comprises a block 104a-1, a spiral groove 104a-2 arranged inside the block 104a-1, and a plurality of balls 104a-3 arranged inside the spiral groove 104 a-2;

the middle part of the connecting rod 104b passes through the through holes on the four end surfaces of the supporting plate 103d, two groups of fixing holes 104e on the surface of the clamping plate 104d are leveled, and fixing pins are arranged in the fixing holes 104e;

the lifting block 104a and the screw rod 103c are connected, the whole body can be lifted, the connecting rod 104b passes through the supporting plate 103d, the moving direction of the connecting rod 104b can be limited, and the shaking is prevented.

When the lifting device is used, firstly, the rotating handle 102a is rotated, then the driving gear 102b can be driven to rotate by rotating the rotating handle 102a, and because the driving gear 102b is meshed with the driven gear 103a, the driven gear 103a can be driven to rotate, then the driven gear 103a can drive the screw rod 103c at the lower side to rotate, the outer side of the screw rod 103c is connected with the lifting block 104a through the ball 104a-3, the torque under the full pressure difference of 25000PSI can be greatly reduced, finally, the lifting block 104a and the connecting rod 104b are integrally structured, and the connecting rod 104b passes through the supporting plate 103d, so that the rotation of the screw rod 103c only can drive the lifting block 104a to lift on the surface of the screw rod 103c, and the lower end of the lifting block is driven to be connected with the clamping plate 104d to lift.

In summary, in actual use, through the connection between the driven gear 103a and the driving gear 102b, an operator only needs to rotate the handle 102a to drive the driven gear 103a to rotate, and then the connection assembly 104 can be lifted and lowered, and the driving gear 102b is smaller than the driven gear 103a, so that the labor is saved, and the operation of the operator is facilitated.

Example 2

Referring to fig. 1 to 2 and 6 to 7, which are the second embodiment of the present utility model, unlike the previous embodiment, this embodiment provides a 25000PSI ultra-high pressure manual flat valve comprising a valve body 200, a first mounting mechanism 300 provided at the upper side of the valve body 200, a second mounting mechanism 400 provided at the lower side of the valve body 200, and a fixing assembly 500 provided at the lower portion of the second mounting mechanism 400;

wherein, the valve body 200 is in sealing connection with the first installation mechanism 300 and the valve body 200 is in sealing connection with the second installation mechanism 400 by adopting fixing bolts.

Further, the valve body 200 includes a frame 201, sealing gaskets 202 disposed at the upper and lower ends of the frame 201, a liquid inlet pipe 203 disposed in the middle of the left side of the frame 201, and a liquid outlet pipe 204 disposed in the middle of the right side of the frame 201;

wherein, the sealing gasket 202 at the upper end is positioned at the joint of the frame 201 and the first installation mechanism 300, and the sealing gasket 202 at the lower end is positioned at the joint of the frame 201 and the second installation mechanism 400;

the sealing gasket 202 that the upper end set up can seal the connection of framework 201 and first installation mechanism 300, and the sealing gasket 202 that the lower extreme set up can seal the connection of framework 201 and second installation mechanism 400 to sealing gasket 202 adopts standard self-excitation structure, and sealing gasket 202 and the contact in outside groove are the outside and have the effect of interior pressure helping seal originally, and self-excitation design not only can satisfy 25000PSI pressure seal requirement, can also effectively prevent the sealed inefficacy that leads to the fact because of well pressure change and pressure vibration when testing pressure.

Further, the valve body 200 further includes a blocking assembly 205, and a valve seat 206 disposed outside the blocking assembly 205;

the blocking assembly 205 includes a valve plate 205a, a flow hole 205b reserved in an upper and middle surface of the valve plate 205a, a first mounting block 205c provided at the top of an upper end of the valve plate 205a, and a second mounting block 205d provided at the bottom of a lower end of the valve plate 205 a;

wherein, the sealing surfaces of the valve seat 206 and the valve plate 205a adopt a supersonic tungsten carbide spraying process;

the valve seat 206 is designed by adopting a double PEEK ring, is provided with an inner valve seat sealing ring and an outer valve seat sealing ring, has high-quality sealing stability, has a certain sand prevention function, adopts high-performance engineering plastic PEEK as a sealing material, is provided with an Elgiloy alloy spring as a compression compensation source to keep pre-compression elasticity in severe temperature difference and high-pressure high-corrosion medium to realize good sealing effect, and the sealing surfaces of the valve seat 206 and the valve plate 205a adopt a supersonic tungsten carbide spraying process, so that the surface hardness and corrosion resistance of the sealing surfaces of the valve plate 205a and the valve seat 206 are improved, and the sealing performance of the valve inside is improved.

Further, the first mounting mechanism 300 includes an upper end mount 301, a valve stem 302 disposed inside the upper end mount 301, and a first packing 303 disposed between the upper end mount 301 and the valve stem 302;

wherein the lower end of the valve rod 302 is connected with the upper side of the blocking assembly 205, and the upper end of the valve rod 302 is connected with the labor saving component 100;

the first sealing packing 303 is an important sealing element for preventing leakage at the valve rod 302, adopts combined packing, and is mainly made of polytetrafluoroethylene+PEEK+alloy springs, and has high pressure resistance, high temperature resistance and high corrosion resistance.

When in use, the upper end of the valve rod 302 is connected with the clamping plate 104d, and the fixing pin is inserted into the fixing hole 104e to complete the installation of the valve rod 302, then the valve rod 302 is driven to lift, and the valve rod 302 moves downwards, so that the connected valve plate 205a moves downwards until the flow hole 205b coincides with the valve seat 206, and the flow can enter from the liquid inlet pipe 203 and then flow out of the liquid outlet pipe 204, otherwise, the valve plate 205a is lifted upwards, and the valve seat 206 can be sealed by the valve plate 205a, so that the flow is prevented from flowing in the device.

In summary, the main materials of the first sealing filler 303 and the second sealing filler 403 are made of polytetrafluoroethylene+PEEK+alloy springs, and the sealing filler has high-pressure resistance, high temperature resistance and high corrosion resistance, the working pressure can reach 37500PSI, the allowable working temperature can reach-70-200 ℃, the valve seat 206 is designed by adopting a double PEEK ring, and the sealing ring is provided with an inner valve seat sealing ring and an outer valve seat sealing ring, has high-quality sealing stability, and simultaneously has a certain sand prevention function, and the surface hardness and the corrosion resistance of the sealing surfaces of the valve seat 206 and the valve plate 205a are improved through a supersonic tungsten carbide spraying process between the valve seat 206 and the valve plate 205a, so that the sealing performance of the whole interior is improved.

Example 3

Referring to fig. 1-2 and 6, a third embodiment of the present utility model, which differs from the previous embodiment in that it provides a specific operation of the second mounting mechanism 400 and the securing assembly 500;

further, the second mounting mechanism 400 includes a lower end mounting bracket 401, a tail rod 402 disposed inside the lower end mounting bracket 401, and a second sealing packing 403 disposed between the lower end mounting bracket 401 and the tail rod 402;

wherein the upper end of tail bar 402 and the underside of blocking assembly 205 are connected to each other;

the tail rod 402 can limit the lifting of the valve plate 205a, and prevent the valve plate 205a from shaking during the lifting process.

Further, the stationary assembly 500 includes a tail housing 501, and a gland 502 disposed inside the tail housing 501;

wherein the inboard upper end of the gland 502 and the tail rod 402 are connected to each other;

the use of the gland 502 and tail rod 402, coupled with the balancing action of the balancing tail rod 402, greatly reduces the risk of moment build up and jamming of the valve stem 302 and valve plate 205a during the opening and closing process.

When in use, the upper end of the tail rod 402 is connected with the lower end of the valve plate 205a, then the lifting of the valve plate 205a drives the tail rod 402 to lift together, and then the tail rod 402 can balance the lifting of the valve plate 205a and further fix the valve plate 205 a.

In summary, the valve plate 205a can be prevented from tilting or swaying during use, and the risk of moment increase and blocking during switching is reduced.

It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in order to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the utility model, or those not associated with practicing the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (8)

1. A compound drive mechanism, characterized in that: comprising the steps of (a) a step of,

a labor-saving component (100) comprising a protective cover (101), a driving component (102) arranged outside the upper end of the protective cover (101), an executing component (103) arranged outside the inner end of the driving component (102), and a connecting component (104) arranged at the lower part of the executing component (103);

the driving assembly (102) comprises a rotating handle (102 a) and a driving gear (102 b) arranged on the outer end surface of the rotating handle (102 a);

wherein, the driving gear (102 b) and the rotary handle (102 a) are of a welding integrated structure;

the execution assembly (103) comprises a driven gear (103 a), a limiting block (103 b) arranged on the upper end surface of the middle part of the driven gear (103 a), a screw rod (103 c) arranged on the lower end of the middle part of the driven gear (103 a), a supporting plate (103 d) arranged at the bottom of the lower end of the screw rod (103 c), and a rotating seat (103 e) arranged at the joint of the screw rod (103 c) and the supporting plate (103 d);

the driven gear (103 a) is connected with the driving gear (102 b) in a meshed mode, the limiting block (103 b) is embedded into the protective cover (101), the outer side of the supporting plate (103 d) is fixedly connected with the protective cover (101), and the bottom of the lower end of the screw rod (103 c) is inserted into the rotary seat (103 e).

2. A compound drive mechanism as claimed in claim 1, wherein: the connecting assembly (104) comprises a lifting block (104 a), four groups of connecting rods (104 b) which are arranged on the lower end face of the lifting block (104 a) at equal intervals, a mounting plate (104 c) which is arranged at the bottom of the lower side of the connecting rod (104 b), a clamping plate (104 d) which is arranged on the lower end face of the mounting plate (104 c), and a fixing hole (104 e) which is arranged on the surface of the clamping plate (104 d);

the lifting block (104 a) comprises a block body (104 a-1), a spiral groove (104 a-2) arranged inside the block body (104 a-1), and a plurality of balls (104 a-3) arranged inside the spiral groove (104 a-2);

the middle part of the connecting rod (104 b) penetrates through the through hole positions of the four end surfaces of the supporting plate (103 d), two groups of fixing holes (104 e) on the surface of the clamping plate (104 d) are leveled, and fixing pins are arranged in the fixing holes (104 e).

3. A 25000PSI ultra-high pressure manual plate valve, characterized in that: a compound drive mechanism according to any one of claims 1-2, further comprising a valve body (200), a first mounting mechanism (300) provided on the upper side of said valve body (200), a second mounting mechanism (400) provided on the lower side of said valve body (200), and a fixing assembly (500) provided on the lower part of said second mounting mechanism (400);

wherein, the valve body (200) and the first installation mechanism (300) and the valve body (200) and the second installation mechanism (400) are all connected in a sealing way by adopting fixing bolts.

4. The 25000PSI ultra high pressure manual flat valve as claimed in claim 3, wherein: the valve body (200) comprises a frame body (201), sealing gasket rings (202) arranged at the upper end and the lower end of the frame body (201), a liquid inlet pipe (203) arranged in the middle of the left side of the frame body (201), and a liquid outlet pipe (204) arranged in the middle of the right side of the frame body (201);

the sealing gasket ring (202) at the upper end is positioned at the joint of the frame body (201) and the first installation mechanism (300), and the sealing gasket ring (202) at the lower end is positioned at the joint of the frame body (201) and the second installation mechanism (400).

5. The 25000PSI ultra high pressure manual flat valve as claimed in claim 4, wherein: the valve body (200) further comprises a blocking assembly (205), and a valve seat (206) disposed outside the blocking assembly (205);

the blocking assembly (205) comprises a valve plate (205 a), a flow hole (205 b) reserved on the upper surface of the valve plate (205 a), a first mounting block (205 c) arranged on the top of the upper end of the valve plate (205 a), and a second mounting block (205 d) arranged on the bottom of the lower end of the valve plate (205 a);

the sealing surfaces of the valve seat (206) and the valve plate (205 a) adopt a supersonic tungsten carbide spraying process.

6. The 25000PSI ultra high pressure manual flat valve as claimed in claim 4 or 5, wherein: the first mounting mechanism (300) comprises an upper end mounting frame (301), a valve rod (302) arranged inside the upper end mounting frame (301), and a first sealing filler (303) arranged between the upper end mounting frame (301) and the valve rod (302);

wherein the lower end of the valve rod (302) is connected with the upper side of the blocking assembly (205), and the upper end of the valve rod (302) is connected with the labor-saving component (100).

7. The 25000PSI ultra high pressure manual flat valve as claimed in claim 6, wherein: the second mounting mechanism (400) comprises a lower end mounting frame (401), a tail rod (402) arranged inside the lower end mounting frame (401), and a second sealing filler (403) arranged between the lower end mounting frame (401) and the tail rod (402);

wherein the upper end of the tail rod (402) and the underside of the blocking assembly (205) are connected to each other.

8. The 25000PSI ultra high pressure manual flat valve as claimed in claim 7, wherein: the fixed assembly (500) comprises a tail cover (501), and a gland (502) arranged inside the tail cover (501);

wherein the upper inner end of the gland (502) and the tail rod (402) are connected with each other.