CN117685377A - Valve structure of simple and easy dismouting - Google Patents

Abstract

The invention relates to the technical field of valves and discloses a valve structure capable of being easily disassembled and assembled. The valve seat assembly comprises an upper valve seat ring, a lower valve seat ring and a fastener, the upper valve seat ring is positioned in the valve cavity, one axial end of the upper valve seat ring is abutted against the sleeve and the valve core, the other axial end of the upper valve seat ring is abutted against the lower valve seat ring, and the lower valve seat ring is connected with the other end of the valve body through the fastener. When the valve seat, the valve core and the sleeve in the valve cavity are required to be maintained, the upper valve seat ring, the valve core and the sleeve in the valve cavity can be taken out only by dismantling fasteners for connecting the valve body and the lower valve seat ring, namely, structures such as an actuating mechanism and a valve cover are not required to be dismantled, so that the maintenance efficiency can be greatly improved, and manpower and material resources are saved.

Description

Valve structure of simple and easy dismouting

Technical Field

The invention relates to the technical field of valves, in particular to a valve structure easy to disassemble and assemble.

Background

For the angle valve under the working condition of high temperature and high pressure, the mode of mounting and dismounting from top to bottom is generally adopted, and under the working condition of high temperature and high pressure, fluid medium often scours the sealing surfaces of the valve core and the valve seat more greatly, so that the replacement frequency is high. When overhauling the operation, to the valve of top-down assembly, need dismantle the bolt of executing structure, packing clamp plate and valve gap flange etc. and then take out valve trim is whole, carries out the change of case and disk seat again, and it is difficult to dismantle, and the consuming time is longer.

Therefore, there is a need for a valve structure that is easy to disassemble and assemble to solve the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a valve structure which is easy to disassemble and assemble, and the valve trim is convenient to disassemble and assemble, so that the maintenance efficiency can be effectively improved.

The technical scheme adopted by the invention is as follows:

the valve structure comprises a valve cover, a valve body, a valve rod, a valve core, a sleeve and a valve seat assembly, wherein the valve body is provided with a valve cavity, the sleeve is positioned in the valve body cavity, the valve cover and the valve seat assembly are connected to the two ends of the valve body to resist against the sleeve, and the valve rod is connected with the valve core and movably penetrates through the sleeve;

the valve seat assembly comprises an upper valve seat ring, a lower valve seat ring and a fastener, wherein the upper valve seat ring is positioned in the valve body cavity, one axial end of the upper valve seat ring is abutted against the sleeve and the valve core, the other axial end of the upper valve seat ring is abutted against the lower valve seat ring, and the lower valve seat ring is connected with the other end of the valve body through the fastener.

Optionally, the upper valve seat ring is of a circular ring structure, and the upper valve seat ring has a first end and a second end along the axial direction of the upper valve seat ring, wherein the first end is abutted against the sleeve and the second end is abutted against the lower valve seat ring, or the first end is abutted against the lower valve seat ring and the second end is abutted against the sleeve.

Optionally, a limiting groove is formed in the valve body, the lower valve seat ring is located in the limiting groove, a fixing hole is formed in the bottom wall of the limiting groove, the rod portion of the fastener is connected with the valve body through the fixing hole, and the head portion of the fastener abuts against the lower valve seat ring and the valve body.

Optionally, the outer peripheral surface of lower valve seat ring is provided with first spacing step, the lateral wall of spacing groove is provided with the spacing step of second, the head of fastener supports the spacing step of first spacing step and the spacing step of second.

Optionally, the lower valve seat ring is in a circular ring structure, and the first limiting step is a ring-shaped step.

Optionally, the valve seat assembly further comprises a first winding gasket, and the first winding gasket is arranged at two axial ends of the upper valve seat ring.

Optionally, the corner that first end and second end are used for the butt case all is provided with first heap welding layer, first end or the second end passes through first heap welding layer with case sealing butt.

Optionally, a valve cover flange is sleeved on the valve cover, the valve cover flange is connected with the valve body, and the valve cover flange is used for enabling the valve cover to be abutted to the sleeve.

Optionally, the valve cover flange is connected with the valve body through a first fastening bolt, and a sealing ring is clamped between the valve cover flange and the valve body.

Optionally, one end of the valve cover, which is away from the sleeve, is in sealing connection with the valve rod through a packing assembly.

The beneficial effects of the invention are as follows:

the valve structure comprises a valve cover, a valve body, a valve rod, a valve core, a sleeve and a valve seat assembly, wherein the valve body is provided with a valve cavity, the sleeve is positioned in the valve cavity, the valve cover and the valve seat assembly are connected to two ends of the valve body to press the sleeve, and the valve rod and the valve core are connected and movably arranged in the sleeve in a penetrating manner. The valve seat assembly comprises an upper valve seat ring, a lower valve seat ring and a fastener, wherein the upper valve seat ring is positioned in a valve cavity, one axial end of the upper valve seat ring is abutted against the sleeve and the valve core, the other axial end of the upper valve seat ring is abutted against the lower valve seat ring, and the lower valve seat ring is connected with the other end of the valve body through the fastener. When the valve seat, the valve core and the sleeve in the valve cavity are required to be maintained, only the fasteners for connecting the valve body and the lower valve seat ring are required to be removed, the upper valve seat ring in the valve cavity can be taken out when the connection between the lower valve seat ring and the valve body is released, and the upper valve seat ring also loses the limit of the valve core, so that the valve core and the sleeve can be directly taken out. This valve structure of simple and easy dismouting is when maintaining disk seat and case and sleeve that is located the valve body intracavity, need not to demolish structures such as actuating mechanism and valve gap, can improve maintenance efficiency greatly, practices thrift manpower and materials.

Drawings

Fig. 1 is a partial cross-sectional view of a valve structure that is simply disassembled and assembled in accordance with an embodiment of the present invention.

In the figure:

1. a valve cover; 11. a compression ring; 12. a C-shaped sealing ring; 13. a second winding spacer;

2. a valve body; 21. a valve body cavity; 22. a limit groove; 221. a second limit step; 23. a fluid channel; 24. a first mounting hole; 25. a second mounting hole;

3. a valve stem; 31. a pin;

4. a valve core; 41. a balance hole;

5. a sleeve;

6. a valve seat assembly; 61. an upper valve seat ring; 611. a first build-up layer; 62. a lower valve seat ring; 621. a first limit step; 63. a fastener; 64. a first winding spacer;

7. a filler assembly; 71. a packing pressing plate; 72. a packing gland; 73. a filler; 74. guide sleeve; 75. a second fastening bolt;

8. a valve cover flange; 81. a seal ring; 82. a second build-up layer; 83. a first fastening bolt.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present invention are shown.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1, this embodiment provides a valve structure with simple disassembly and assembly, which comprises a valve cover 1, a valve body 2, a valve rod 3, a valve core 4, a sleeve 5 and a valve seat assembly 6, wherein the valve body 2 is provided with a valve cavity 21, the sleeve 5 is positioned in the valve cavity 21, the valve cover 1 and the valve seat assembly 6 are connected at two ends of the valve body 2 to press against the sleeve 5, and the valve rod 3 and the valve core 4 are connected and movably arranged in the sleeve 5 in a penetrating manner. The valve seat assembly 6 comprises an upper valve seat ring 61, a lower valve seat ring 62 and a fastener 63, the upper valve seat ring 61 is located in the valve cavity 21, one axial end of the upper valve seat ring 61 is abutted against the sleeve 5 and the valve core 4, the other axial end of the upper valve seat ring 61 is abutted against the lower valve seat ring 62, and the lower valve seat ring 62 is connected with the other end of the valve body 2 through the fastener 63. That is, when the valve seat, the valve element 4 positioned in the valve cavity 21, and the sleeve 5 are to be repaired, only the fastener 63 connecting the valve body 2 and the lower seat ring 62 is to be removed, and when the connection between the lower seat ring 62 and the valve body 2 is released, the upper seat ring 61 positioned in the valve cavity 21 can be taken out, and the upper seat ring 61 also loses the limit of the valve element 4, so that the valve element 4 can be directly taken out. The valve structure of simple and easy dismouting that this embodiment provided is when maintaining disk seat and case 4 and sleeve 5 that are located valve cavity 21, need not to demolish structures such as actuating mechanism and valve gap 1, can improve maintenance efficiency greatly, practices thrift manpower and materials.

Alternatively, the upper valve seat ring 61 has a circular ring structure, and the upper valve seat ring 61 has a first end and a second end along its axial direction, and when the valve is implemented, the upper valve seat ring 61 is inserted into the valve cavity 21, the first end of the upper valve seat ring 61 may abut against the sleeve 5, the second end of the upper valve seat ring 61 may abut against the lower valve seat ring 62, or the first end of the upper valve seat ring 61 may abut against the lower valve seat ring 62, and the second end of the upper valve seat ring 61 may abut against the sleeve 5. That is, after the valve is used for a certain period of time, the assembling direction of the upper valve seat ring 61 can be adjusted, so that the first end and the second end of the upper valve seat ring 61 can be in rotation contact with the valve core 4, the service life of the upper valve seat ring 61 is prolonged, and the cost is saved.

Preferably, the valve seat assembly 6 further comprises a first winding gasket 64, and the two axial ends of the upper valve seat ring 61 are provided with the first winding gasket 64 so as to enhance the tightness of the abutting part of the upper valve seat ring 61 and the lower valve seat ring 62 and the sleeve 5.

Preferably, the corners of the first end and the second end for abutting against the valve core 4 are provided with a first surfacing layer 611, and the first end or the second end is in sealing abutting against the valve core 4 through the first surfacing layer 611, so that the sealing performance of the abutting part of the upper valve seat ring 61 and the valve core 4 is ensured. The upper seat ring 61 has a circular ring structure, and the first weld overlay 611 is disposed at the junction of the inner wall surface of the upper seat ring 61 and the end surface thereof.

Optionally, the valve body 2 is provided with a limiting groove 22, the bottom wall of the limiting groove 22 is provided with a fixing hole, the lower valve seat ring 62 is located in the limiting groove 22, the rod portion of the fastening piece 63 is connected with the valve body 2 through the fixing hole, and the head portion of the fastening piece 63 abuts against the lower valve seat ring 62 and the valve body 2. The lower valve seat ring 62 is located in the limit groove 22, the limit groove 22 can limit the lower valve seat ring 62 to move only along the groove depth direction of the limit groove 22, the fastening piece 63 is fixed with the valve body 2, and the fastening piece 63 simultaneously abuts against the lower valve seat ring 62 and the valve body 2, which limits the movement of the lower valve seat ring 62 along the groove depth direction of the limit groove 22, so that the fixation of the lower valve seat ring 62 and the valve body 2 can be realized.

Preferably, the outer circumferential surface of the lower seat ring 62 is provided with a first limiting step 621, the side wall of the limiting groove 22 is provided with a second limiting step 221, and the head of the fastener 63 abuts against the first limiting step 621 and the second limiting step 221. In particular, along the axial direction of the fastener 63, the distance between the first limiting step 621 and the end surface of the lower valve seat ring 62 facing away from the upper valve seat ring 61 is L1, and the height of the head of the fastener 63 is L2, where L1 is greater than or equal to L2, so that the head of the fastener 63 does not exceed the lower valve seat ring 62. Preferably, the end face of the lower seat ring 62 facing away from the upper seat ring 61 is flush with the end face of the valve body 2.

Preferably, the lower seat ring 62 has a circular ring structure, and the first limiting step 621 is a ring-shaped step, i.e. the fastener 63 can be pressed against any position of the first limiting step 621, so as to reduce the requirement on the assembly accuracy of the lower seat ring 62.

Further, the valve body 2 is provided with a fluid channel 23, the valve body 2 is further provided with a first mounting hole 24 and a second mounting hole 25, the first mounting hole 24 is positioned at the inlet of the fluid channel 23, the second mounting hole 25 is positioned at the outlet of the fluid channel 23, and the valve body 2 is communicated with an external pipeline through the first mounting hole 24 and the second mounting hole 25.

Further, the sleeve 5 is located in the valve cavity 21, and the valve cover 1 partially extends into the valve cavity 21, and the valve cover flange 8 is sleeved on the valve cover 1 to be connected with the valve body 2, and the valve cover flange 8 abuts against the sleeve 5, so that the valve cover 1 abuts against the sleeve 5. In specific implementation, the upper valve seat ring 61 is assembled in the valve body cavity 21, the lower valve seat ring 62 is connected with the valve body 2, the sleeve 5 is placed in the valve body cavity 21, the sleeve 5 is abutted with the lower valve seat ring 62, the valve core 4 is placed in the sleeve 5, the valve core 4 is abutted with the lower valve seat ring 62, the valve rod 3 is connected with the valve core 4, the valve cover 1 is sleeved on the valve rod 3 and abutted with the sleeve 5, and finally the valve cover flange 8 is connected with the valve body 2, so that the valve cover flange 8 is abutted against the valve cover 1.

Preferably, the valve core 4 is in threaded connection with the valve rod 3, that is, an insertion hole is provided at one end of the valve rod 3 facing the valve core 4, and a connection portion of the valve core 4 is inserted into the insertion hole and is in threaded connection with the insertion hole. Preferably, the valve core 4 is connected to the valve stem 3 by means of a pin 31, i.e. the valve stem 3 and the valve core 4 are provided with opposite through holes, in which the pin 31 is fixed. Preferably, the valve core 4 is provided with a balance hole 41, and the balance hole 41 is used for keeping the air pressure at two axial ends of the valve core 4 consistent.

Preferably, a compression ring 11 and a C-shaped sealing ring 12 are further clamped between the valve cover 1 and the sleeve 5, the sleeve 5 is provided with a sealing ring groove, the C-shaped sealing ring 12 and the compression ring 11 are both arranged in the sealing ring groove, the compression ring 11 abuts against the C-shaped sealing ring 12 at the bottom of the sealing ring groove, and the inner walls of the C-shaped sealing ring 12 and the compression ring 11 abut against the valve core 4. Preferably, a second winding gasket 13 is further clamped between the valve cover 1 and the sleeve 5, so as to enhance the tightness of the abutting part of the valve cover 1 and the sleeve 5.

Optionally, the bonnet flange 8 is connected with the valve body 2 through a first fastening bolt 83, and a sealing ring 81 is clamped between the bonnet flange 8 and the valve body 2 to ensure tightness of connection between the bonnet flange 8 and the valve body 2. The first fastening bolt 83 is a stud bolt, one end of which is in threaded connection with the valve body 2, and the other end of which is connected with a first nut which abuts against the valve cover flange 8. Preferably, a second weld overlay 82 is further arranged between the valve body 2 and the sealing ring 81, and between the valve cover 1 and the sealing ring 81, so as to ensure tightness of the abutting part of the valve body 2 and the valve cover 1. In addition, the sealing ring 81 and the valve cover 1 form a self-tightening sealing structure, namely, the higher the pressure in the valve cavity 21 is, the better the tightness is, and the less leakage is generated.

Optionally, the end of the valve cap 1 facing away from the sleeve 5 is sealingly connected to the valve stem 3 by a packing assembly 7. In specific implementation, the packing assembly 7 comprises a packing pressing plate 71, a packing pressing plate 72, a guide sleeve 74 and a packing 73, the valve cover 1 is provided with a packing ring groove, the packing 73 and the guide sleeve 74 are both positioned in the packing ring groove, the guide sleeve 74 is positioned at the bottom of the packing ring groove, the packing pressing plate 72 and the packing pressing plate 71 are both sleeved on the valve rod 3, the packing pressing plate 71 is connected with the valve cover 1 through a second fastening bolt 75, and the packing pressing plate 72 is clamped between the packing 73 and the packing pressing plate 71. The second fastening bolt 75 is a stud bolt, one end of which is screwed with the bonnet 1, and the other end of which is connected with a second nut that presses against the packing presser 71.

The above embodiments merely illustrate the basic principle and features of the present invention, and the present invention is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The valve structure is characterized by comprising a valve cover (1), a valve body (2), a valve rod (3), a valve core (4), a sleeve (5) and a valve seat assembly (6), wherein the valve body (2) is provided with a valve cavity (21), the sleeve (5) is positioned in the valve body cavity (21), the valve cover (1) and the valve seat assembly (6) are connected to two ends of the valve body (2) so as to resist against the sleeve (5), and the valve rod (3) is connected with the valve core (4) and movably penetrates through the sleeve (5);

the valve seat assembly (6) comprises an upper valve seat ring (61), a lower valve seat ring (62) and a fastener (63), wherein the upper valve seat ring (61) is positioned in the valve body cavity (21), one axial end of the upper valve seat ring (61) is abutted against the sleeve (5) and the valve core (4), the other axial end of the upper valve seat ring (61) is abutted against the lower valve seat ring (62), and the lower valve seat ring (62) is connected with the other end of the valve body (2) through the fastener (63).

2. The valve structure of claim 1, wherein the upper valve seat ring (61) has a circular ring structure, the upper valve seat ring (61) has a first end and a second end along its own axial direction, the first end abuts against the sleeve (5) and the second end abuts against the lower valve seat ring (62), or the first end abuts against the lower valve seat ring (62) and the second end abuts against the sleeve (5).

3. The valve structure of claim 1, wherein the valve body (2) is provided with a limit groove (22), the lower valve seat ring (62) is located in the limit groove (22), a bottom wall of the limit groove (22) is provided with a fixing hole, a rod portion of the fastener (63) is connected with the valve body (2) through the fixing hole, and a head portion of the fastener (63) abuts against the lower valve seat ring (62) and the valve body (2).

4. The valve structure of claim 3, wherein a first limiting step (621) is provided on the outer circumferential surface of the lower valve seat ring (62), a second limiting step (221) is provided on the side wall of the limiting groove (22), and the head of the fastener (63) abuts against the first limiting step (621) and the second limiting step (221).

5. The valve structure of claim 4, wherein the lower seat ring (62) is a circular ring structure and the first stop step (621) is a ring-shaped step.

6. The valve structure of claim 1, wherein the valve seat assembly (6) further comprises a first winding gasket (64), and the first winding gasket (64) is provided at both axial ends of the upper valve seat ring (61) itself.

7. The valve structure of claim 2, wherein the first end and the second end are both provided with a first weld overlay (611) at corners for abutting against the valve core (4), and the first end or the second end is in sealing abutment against the valve core (4) through the first weld overlay (611).

8. The valve structure of claim 1, wherein the valve cover (1) is sleeved with a valve cover flange (8), the valve cover flange (8) is connected with the valve body (2), and the valve cover flange (8) is used for enabling the valve cover (1) to be abutted to the sleeve (5).

9. The valve structure of simple disassembly and assembly according to claim 8, wherein the valve cover flange (8) and the valve body (2) are connected through a first fastening bolt (83), and a sealing ring (81) is clamped between the valve cover flange (8) and the valve body (2).

10. A valve structure according to any one of claims 1 to 9, wherein the end of the valve cap (1) facing away from the sleeve (5) is sealingly connected to the valve stem (3) by means of a packing assembly (7).