Mounting structure of rotary valve rod and valve

Abstract

The mounting structure of the rotary valve rod comprises a valve body and a valve rod, a mounting through hole and a mounting blind hole are formed in the valve body, the valve rod is rotationally matched with the mounting through hole, one end of the valve rod is rotationally matched with the mounting blind hole, and the other end of the valve rod is rotationally matched with the mounting blind hole. One end of the valve rod is located in the valve body, the other end of the valve rod is located outside the valve body, a first purging opening and a second purging opening are formed in the valve body, the first purging opening is located at the mounting through hole, the second purging opening is located at the mounting blind hole, the first purging opening is communicated with the mounting through hole, and the second purging opening is communicated with the mounting blind hole. The utility model further discloses a valve comprising the mounting structure of the rotary valve rod.

Description

Technical Field

[0001] The utility model relates to the field of valve equipment, in particular to an installation structure of a rotary valve stem and a valve. Background Art

[0002] Patent announcement document CN215635116U discloses a valve with its own purge function. A valve with this structure can purge and clean the inside of the valve body through its own purge port. However, in actual use, foreign objects are often stuck between the valve shaft (numbered 4 in the figure in the document, also called valve stem) and the valve body (numbered 1 in the figure in the document), and a valve with this structure cannot purge and clean the valve shaft and the valve body. When foreign objects (especially granular foreign objects) are stuck between the valve shaft and the valve body, the valve shaft is prone to abnormal noise and jamming during rotation. Utility Model Content

[0003] In view of the above problems, the utility model provides a mounting structure of a rotary valve stem and a valve.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A mounting structure for a rotary valve stem comprises a valve body and a valve stem, wherein the valve body is provided with a mounting through hole and a mounting blind hole, the valve stem is rotatably fitted with the mounting through hole, one end of the valve stem is rotatably fitted with the mounting blind hole, and the other end of the valve stem is located outside the valve body, and the valve body is provided with a first purge port and a second purge port, the first purge port is located at the mounting through hole, the second purge port is located at the mounting blind hole, the first purge port is communicated with the mounting through hole, and the second purge port is communicated with the mounting blind hole.

[0006] In this installation structure, there are two places where the valve stem and the valve body rotate and cooperate, namely the installation through hole and the installation blind hole. The installation through hole and the installation blind hole are also the most likely to accumulate foreign particles. In this structure, a first purge port is set at the installation through hole, and a second purge port is set at the installation blind hole. The purge equipment (it can be an air blowing equipment) can purge the installation through hole through the first purge port, and can purge the installation blind hole through the second purge port. In this way, foreign matter between the valve stem and the valve body can be purged to avoid foreign matter being retained between the valve stem and the valve body, improve the smoothness of the valve stem rotation, and reduce the probability of abnormal noise and jamming when the valve stem rotates.

[0007] Optionally, it further includes a first bearing and a second bearing, wherein the first bearing and the second bearing are both arranged between the valve stem and the valve body, the first bearing is located in the mounting through hole, and the second bearing is located in the mounting blind hole.

[0008] The purpose of providing the first bearing and the second bearing is to improve the stability of the valve stem when it rotates.

[0009] Optionally, it further includes a spacer ring, on which a plurality of purge through holes are opened, and the spacer ring is located on one side of the first purge port.

[0010] There are two functions of setting up the spacer ring with a purge hole. The first is to ensure the stability of the valve stem when it rotates. The second is that since the purge hole can flow the purge gas, it can ensure that all parts of the first bearing can be purged by the airflow, thereby improving the purge cleaning efficiency.

[0011] Optionally, a graphite packing group is further included, wherein the graphite packing group is arranged in the mounting through hole and the graphite packing group is located between the valve stem and the valve body.

[0012] The function of the graphite packing group is to seal the installation through hole, and specifically the spacer ring is located between the first bearing and the graphite packing group.

[0013] Optionally, a thrust washer is further included, wherein the thrust washer is arranged between the valve stem and the valve body, the thrust washer is located in the mounting through hole, and the thrust washer is located between the graphite packing group and the first purge port.

[0014] The function of the thrust washer is to prevent the airflow from blowing the graphite packing group and ensure the sealing performance of the graphite packing group.

[0015] Optionally, a bottom plate is further included, which is detachably arranged on the valve body, a sealing graphite gasket is arranged between the bottom plate and the valve body, and the mounting blind hole is located between the valve body and the bottom plate.

[0016] Optionally, it also includes a thrust bearing and a retaining ring, wherein the thrust bearing is arranged in the mounting blind hole, and the valve stem and the thrust bearing are rotatably matched together, and the retaining ring is arranged on the valve stem, and the retaining ring is used to contact the thrust bearing.

[0017] Specifically, one end of the thrust bearing is close to the second bearing, and the retaining ring is used for contacting the thrust bearing. The thrust bearing and the retaining ring function to prevent the valve stem from moving up and down.

[0018] A valve comprises the installation structure of the rotary valve stem as described above.

[0019] The beneficial effects of the utility model are: foreign matter between the valve stem and the valve body can be purged, foreign matter can be avoided from being retained between the valve stem and the valve body, the smoothness of the valve stem rotation is improved, and the probability of abnormal noise and jamming when the valve stem rotates is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram showing the matching relationship between the valve stem and the mounting through hole;

[0021] Figure 2 It is a schematic diagram showing the matching relationship between the valve stem and the mounting blind hole;

[0022] Figure 3 It is a schematic diagram of the structure of the spacer ring.

[0023] The reference numerals in the figure are: 1, valve body; 2, valve stem; 3, base plate; 4, first bearing; 5, spacer ring; 501, purge through hole; 6, thrust washer; 7, graphite packing group; 8, thrust bearing; 9, retaining ring; 10, graphite sealing gasket; 11, second bearing; 1202, second purge port. DETAILED DESCRIPTION

[0024] The utility model is described in detail below in conjunction with the accompanying drawings.

[0025] Example 1

[0026] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, a rotary valve stem installation structure includes a valve body 1 and a valve stem 2. The valve body 1 is provided with an installation through hole and an installation blind hole (the installation through hole and the installation blind hole are both in a connected state with the cavity in the valve body), the valve stem and the installation through hole are rotationally matched together, one end of the valve stem is rotationally matched together with the installation blind hole, and the other end of the valve stem is located outside the valve body 1. The valve body 1 is provided with a first purge port and a second purge port 1202, the first purge port is located at the installation through hole, the second purge port 1202 is located at the installation blind hole, the first purge port is connected with the installation through hole, and the second purge port 1202 is connected with the installation blind hole.

[0027] In this installation structure, there are two places where the valve stem and the valve body 1 rotate together, namely the installation through hole and the installation blind hole. The installation through hole and the installation blind hole are also the most likely to accumulate foreign particles. In this structure, a first purge port is set at the installation through hole, and a second purge port 1202 is set at the installation blind hole. The purge equipment (it can be an air blowing equipment) can purge the installation through hole through the first purge port, and can purge the installation blind hole through the second purge port 1202. In this way, foreign matter between the valve stem and the valve body 1 can be purged to avoid foreign matter being trapped between the valve stem and the valve body 1, thereby improving the smoothness of the valve stem rotation and reducing the probability of abnormal noise and jamming when the valve stem rotates.

[0028] Specifically in this structure, the first purge port and the second purge port 1202 both use NPT tapered pipe threaded holes. The NPT tapered pipe threaded holes are convenient for installing air pipes and have good self-tightness when plugged, so that the liquid medium in the valve body 1 will not leak out during use.

[0029] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, it also includes a first bearing 4 and a second bearing 11. The first bearing 4 and the second bearing 11 are both arranged between the valve stem and the valve body 1. The first bearing 4 is located in the installation through hole, and the second bearing 11 is located in the installation blind hole.

[0030] The first bearing 4 and the second bearing 11 are provided to improve the stability of the valve stem during rotation.

[0031] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, it also includes a spacer ring 5, on which four purge holes 501 are opened, and the spacer ring 5 is located on one side of the first purge port.

[0032] The spacer ring 5 with the purge hole 501 has two functions. The first is to ensure the stability of the valve stem during rotation. The second is that the purge gas can flow through the purge hole 501, so that the first bearing 4 can be purged by the airflow, thereby improving the purge cleaning efficiency and reducing the probability of foreign matter appearing in the installation hole.

[0033] In this embodiment, four purge holes 501 are opened on the spacer ring 5, and in other equivalent embodiments, other numbers of purge holes may also be opened. In this embodiment, the four purge holes are located in the same plane, and in other equivalent embodiments, the purge holes may not be in the same plane.

[0034] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, a graphite packing group 7 is also included. The graphite packing group 7 is arranged in the installation through hole, and the graphite packing group 7 is located between the valve stem and the valve body 1.

[0035] The function of the graphite packing group 7 is to seal the installation through hole. Specifically, the spacer ring 5 is located between the first bearing 4 and the graphite packing group 7 .

[0036] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, it also includes a thrust washer 6, which is arranged between the valve stem and the valve body 1, the thrust washer 6 is located in the installation through hole, and the thrust washer 6 is located between the graphite packing group 7 and the first purge port.

[0037] The thrust washer 6 is used to prevent the airflow from sweeping the graphite packing group 7 , thereby ensuring the sealing performance of the graphite packing group 7 .

[0038] As attached Figure 1 , Attachment Figure 2 And attached Figure 3As shown, it also includes a bottom plate 3, which is detachably arranged on the valve body 1, a sealing graphite gasket is arranged between the bottom plate 3 and the valve body 1, and the mounting blind hole is located between the valve body 1 and the bottom plate 3.

[0039] Specifically, in this structure, the second purge port 1202 is provided on the bottom plate 3. Similarly, the second purge port 1202 can also be provided on the valve body 1.

[0040] In this structure, the second purge port 1202 is located at the bottom of the valve stem, so the second purge port 1202 can also be used as a sewage outlet when the valve body 1 is repaired.

[0041] As attached Figure 1 , Attachment Figure 2 And attached Figure 3 As shown, it also includes a thrust bearing 8 and a retaining ring 9. The thrust bearing 8 is arranged in the mounting blind hole, and the valve stem and the thrust bearing 8 are rotatably matched together. The retaining ring 9 is arranged on the valve stem, and the retaining ring 9 is used to contact the thrust bearing 8.

[0042] Specifically, one end of the thrust bearing 8 is close to the second bearing 11, and the snap ring 9 is used to contact the thrust bearing 8. The thrust bearing 8 and the snap ring 9 function to prevent the valve stem from moving up and down.

[0043] Example 2

[0044] A valve includes the installation structure of the rotary valve stem as shown in Example 1.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent transformations made using the contents of the present invention specification, directly or indirectly used in other related technical fields, are also included in the protection scope of the present invention.

Claims

1. A rotary valve stem mounting structure, comprising a valve body and a valve stem, wherein the valve body is provided with a mounting through hole and a mounting blind hole, the valve stem is rotatably matched with the mounting through hole, one end of the valve stem is rotatably matched with the mounting blind hole, and the other end of the valve stem is located outside the valve body, characterized in that: The valve body is provided with a first purge port and a second purge port, wherein the first purge port is located at the mounting through hole, and the second purge port is located at the mounting blind hole, the first purge port is communicated with the mounting through hole, and the second purge port is communicated with the mounting blind hole.

2. The installation structure of the rotary valve stem according to claim 1, characterized in that: It also includes a first bearing and a second bearing, wherein the first bearing and the second bearing are both arranged between the valve stem and the valve body, the first bearing is located in the mounting through hole, and the second bearing is located in the mounting blind hole.

3. The installation structure of the rotary valve stem according to claim 1, characterized in that: It also includes a spacer ring, on which a plurality of purge through holes are opened, and the spacer ring is located at one side of the first purge port.

4. The installation structure of the rotary valve stem according to claim 1, characterized in that: It also includes a graphite packing group, which is arranged in the installation through hole and located between the valve stem and the valve body.

5. The installation structure of the rotary valve stem according to claim 4, characterized in that: It also includes a thrust washer, which is arranged between the valve stem and the valve body, is located in the installation through hole, and is located between the graphite packing group and the first purge port.

6. The installation structure of the rotary valve stem according to claim 1, characterized in that: It also includes a bottom plate, which is detachably arranged on the valve body, a sealing graphite gasket is arranged between the bottom plate and the valve body, and the mounting blind hole is located between the valve body and the bottom plate.

7. The installation structure of the rotary valve stem according to claim 1, characterized in that: It also includes a thrust bearing and a retaining ring. The thrust bearing is arranged in the mounting blind hole, and the valve stem and the thrust bearing are rotatably matched together. The retaining ring is arranged on the valve stem and is used to contact the thrust bearing.

8. A valve, characterized in that: The invention comprises a mounting structure for a rotary valve stem as claimed in any one of claims 1 to 7.

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