Shaft seal valve

Abstract

The utility model relates to a shaft sealing valve which comprises a valve body, a valve plate and a sealing shaft, the valve body is provided with a valve cavity, the valve plate is installed in the valve cavity, the lower end of the valve body is provided with a valve body shaft hole, the lower end of the valve body shaft hole is provided with a flange plate, the sealing shaft penetrates through the flange plate and is installed in the valve body shaft hole, and the upper end of the sealing shaft is connected with the lower end of the valve plate. A third shaft sleeve is installed at the lower end in the shaft hole of the valve body and is an integrated third shaft sleeve, a sealing groove is formed in the lower end or / and the upper end of the sealing shaft, a sealing ring is embedded in the sealing groove, and the sealing shaft is installed in the integrated third shaft sleeve in a penetrating mode after the sealing ring is embedded in the sealing shaft. And the sealing shaft is hermetically mounted in the valve body shaft hole through the sealing ring. The utility model overcomes the defect that the sealing performance of the valve is poor because the sealing ring is damaged when a fluid medium is injected into or penetrates into the sealing shaft due to the fact that the shaft is arranged in the shaft hole of the valve body through the structure of two sections of shaft sleeves and the sealing ring and the gap between the sealing ring and the two sections of shaft sleeves is too loose or too tight. And the damage rate and the replacement cost caused by poor sealing performance of the valve are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a shaft sealing valve. Background Art

[0002] Valves are control components in pipeline fluid delivery systems. They are used to change the cross-section of the passage and the direction of medium flow. They have functions such as diversion, cut-off, throttling, check, diversion or overflow pressure relief. The sealing performance of the valve when controlling the flow must reach a very high level to meet its effectiveness, so the valve seals must meet certain requirements.

[0003] The existing method for installing a shaft in a valve body shaft hole is to install a long shaft sleeve in the valve body shaft hole, then insert a sealing ring, and then install a short shaft sleeve, ensuring that the sealing ring is located at the end of the valve body shaft hole. The shaft is then inserted into the short shaft sleeve, the sealing ring, and the long shaft sleeve in sequence, forming a seal between the shaft and the shaft sleeve. This method has the following drawbacks: Because the long shaft sleeve and the short shaft sleeve need to be inserted separately, their positioning accuracy is difficult to control, resulting in an inability to control the tightness of the sealing ring and the two shaft sleeves. If the gap between the sealing ring and the two shaft sleeves is too loose, fluid medium can be injected, resulting in poor valve sealing. If the gap between the sealing ring and the two shaft sleeves is too tight, the sealing ring can be easily damaged when the shaft is inserted, resulting in poor valve sealing.

[0004] Existing valves generally use single-layer sealing for sealing, and most valves have damaged sealing structures or insufficient sealing, causing the valves to fail to function properly, which not only causes leakage losses, but also reduces work efficiency. At the same time, the valves must be replaced, increasing costs.

[0005] In response to the above technical problems, a shaft sealing valve is provided. Summary of the Invention

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a shaft sealing valve, which adopts a structure in which a sealing groove is made at the end of the sealing shaft and a sealing ring is installed in the sealing groove. The shaft and the sealing ring are installed in the shaft sleeve synchronously, and the shaft sleeve can be installed at one time, which has the advantages of easy installation and improved sealing effect.

[0007] The utility model solves the technical problem by the following technical solutions:

[0008] A shaft sealing valve comprises a valve body, a valve plate and a sealing shaft, the valve body being provided with a valve cavity, a valve plate being installed in the valve cavity, a valve body shaft hole being provided at the lower end of the valve body, a flange being installed at the lower end of the valve body shaft hole, the sealing shaft being installed in the valve body shaft hole through the flange, and the upper end of the sealing shaft being connected to the lower end of the valve plate; it is characterized in that: a shaft sleeve three is installed at the lower end of the valve body shaft hole, the shaft sleeve three is an integrated shaft sleeve three, a sealing groove is provided at the lower end or / and the upper end of the sealing shaft, a sealing ring is embedded in the sealing groove, the sealing shaft is embedded in the sealing ring and then inserted into the integrated shaft sleeve three; the sealing shaft is sealed and installed in the valve body shaft hole through the sealing ring.

[0009] Furthermore, the sealing grooves are 1 to N sealing grooves, and the sealing rings are embedded in the 1 to N sealing grooves.

[0010] The advantages and positive effects of the utility model are:

[0011] 1. The shaft sealing valve of the utility model has a sealing groove formed on the lower end or / and the upper end of the sealing shaft, in which a sealing ring is embedded. The shaft sleeve is an integrated shaft sleeve to prevent the fluid medium from flowing into the valve and improve the sealing performance of the valve.

[0012] 2. The shaft sealing valve of the utility model has a sealing shaft with a sealing ring embedded therein and then inserted into the one-piece shaft sleeve. This overcomes the defect of the existing valve in which the shaft is installed in the shaft hole of the valve body through the structure of two-section shaft sleeves and sealing rings. Due to the gap between the sealing ring and the two-section shaft sleeves being too loose or too tight, the sealing ring is damaged when the fluid medium is injected into or penetrates the sealing shaft, resulting in poor sealing of the valve.

[0013] 3. The shaft sealing valve of the utility model has high and stable installation precision, reduces valve processing technology, and reduces the damage rate and replacement cost of the valve due to poor sealing.

[0014] 4. The shaft sealing valve of the utility model adopts a structure in which a sealing groove is made at the end of the sealing shaft and a sealing ring is installed in the sealing groove. The shaft and the sealing ring are installed in the shaft sleeve three at the same time. The shaft sleeve three can be installed at one time, which has the advantages of easy installation and improved sealing effect.

[0015] 5. The shaft sealing valve of the utility model can adjust the number of sealing rings according to the actual sealing pressure and different pressures; only one shaft sleeve needs to be processed and installed, which saves one shaft sleeve, reduces materials, saves energy, saves process time, and improves sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional diagram of the shaft sealing valve of the utility model;

[0017] Figure 2 This is an exploded view of the shaft sealing valve of the utility model;

[0018] Figure 3 This is the main view of the shaft sealing valve of the utility model;

[0019] Figure 4 for Figure 3 AA section view;

[0020] Figure 5 Schematic diagram of the sealing shaft structure of the shaft sealing valve of this utility model Figure 1 ;

[0021] Figure 6 Schematic diagram of the sealing shaft structure of the shaft sealing valve of this utility model Figure 2 ;

[0022] Figure 7 Schematic diagram of the sealing shaft structure of the shaft sealing valve of this utility model Figure 3 ;

[0023] In the picture:

[0024] 1-shaft sleeve 1, 2-valve body, 3-valve plate, 4-valve body shaft hole, 5-shaft sleeve 3, 6-sealing shaft, 7-sealing ring, 8-sealing groove, 9-valve cavity, 10-shaft sleeve 2, 11-shaft 1, 12-flange. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely illustrative and non-restrictive, and should not be used to limit the scope of protection of the present invention.

[0026] Example 1

[0027] like Figures 1 to 3 The figure shows a shaft-sealed valve comprising a valve body 2, a valve plate 3, and a sealing shaft 6. The valve body 2 is formed with a valve cavity 9, within which the valve plate 3 is mounted. The lower end of the valve body 2 is formed with a valve body shaft hole 4, with a flange 12 mounted at the lower end of the valve body shaft hole 4. The lower end of the sealing shaft 6 is formed with three sealing grooves 8, and a sealing ring 7 is mounted in the sealing grooves 8 of the sealing shaft 6. The sealing shaft 6 passes through the flange 12 and into the lower end of the valve body shaft hole 4 via an integrated shaft sleeve 3 5. The upper end of the sealing shaft 6 passes through the lower end of the valve cavity 9 via a shaft sleeve 2 10 and is connected to the lower end of the valve plate 3. The upper end of the valve cavity 9 is mounted with a shaft 11 via a shaft sleeve 1 1. This valve body is suitable for installation in which the diameter of the valve cavity 9 is smaller than the length of the sealing shaft 6.

[0028] Example 2

[0029] like Figure 4The figure shows a shaft-sealed valve comprising a valve body 2, a valve plate 3, and a sealing shaft 6. The valve body 2 is formed with a valve cavity 9, in which the valve plate 3 is mounted. The lower end of the valve body 2 is formed with a valve body shaft hole 4, and a flange 12 is mounted at the lower end of the valve body shaft hole 4. The upper end of the sealing shaft 6 is formed with two sealing grooves 8, and a sealing ring 7 is mounted in the sealing grooves 8 of the sealing shaft 6. The sealing shaft 6 passes from the lower end of the valve cavity 9 through a shaft sleeve 2 10 and into an integrated shaft sleeve 3 5 at the bottom of the valve body shaft hole 4, and then passes through the flange 12. The upper end of the sealing shaft 6 is connected to the lower end of the valve plate 3. The upper end of the valve cavity 9 is mounted with a shaft 11 through a shaft sleeve 1. This valve is suitable for installation in valve bodies where the diameter of the valve cavity 9 is larger than the length of the sealing shaft 6.

[0030] Example 3

[0031] like Figure 5 As shown, a shaft sealing valve includes a valve body 2, a valve plate 3 and a sealing shaft 6. The valve body 2 is formed with a valve cavity 9, and the valve plate 3 is installed in the valve cavity 9. The lower end of the valve body 2 is formed with a valve body shaft hole 4, and the lower end 4 of the valve body shaft hole is installed with a flange 12. The upper end of the sealing shaft 6 is formed with a sealing groove 8, and the lower end of the sealing shaft 6 is formed with two sealing grooves 8. The sealing ring 7 is installed in the sealing groove 8 of the sealing shaft 6;

[0032] The sealing shaft 6 passes through the shaft sleeve 2 10 from the lower end of the valve cavity 9 to the integrated shaft sleeve 3 5 at the bottom of the valve body shaft hole 4, and then passes through the flange 12. The upper end of the sealing shaft 6 is connected to the lower end of the valve plate 3. The upper end of the valve cavity 9 is installed with the shaft 11 through the shaft sleeve 1. It is suitable for installation on valve bodies where the diameter of the valve cavity 9 is larger than the length of the sealing shaft 6.

[0033] The sealing shaft 6 passes through the flange 12 and enters from the lower end of the valve body shaft hole 4 through the integrated shaft sleeve 3 5. The upper end of the sealing shaft 6 passes through the lower end of the valve cavity 9 through the shaft sleeve 2 10 and is connected to the lower end of the valve plate 3. The shaft sleeve 1 is installed at the upper end of the valve cavity 9, which is suitable for valve body installation where the diameter of the valve cavity 9 is smaller than the length of the sealing shaft 6.

[0034] The utility model shaft sealing valve has a sealing groove 8 formed on the lower end or / and upper end of the sealing shaft 6, in which a sealing ring 7 is embedded. The shaft sleeve 3 5 is an integrated shaft sleeve 3 5, which prevents the fluid medium from flowing into the valve and improves the valve sealing performance.

[0035] The shaft sealing valve of the utility model has a sealing shaft 6, in which the sealing ring 7 is embedded and then inserted into the integrated shaft sleeve 3 5, which overcomes the defect of the existing valve in which the shaft is installed in the shaft hole of the valve body through the structure of two-section shaft sleeves and sealing rings. Due to the gap between the sealing ring 7 and the two-section shaft sleeves being too loose or too tight, the sealing ring 7 is damaged when the fluid medium is injected into or penetrates the sealing shaft 6, resulting in poor sealing of the valve.

[0036] This new shaft-sealed valve features high installation precision and stability, reduces valve processing time, and reduces valve damage and replacement costs due to poor sealing. A sealing groove is formed at the end of the sealing shaft, and a sealing ring is installed in the groove. The shaft and sealing ring are simultaneously installed within the shaft sleeve, allowing the sleeve to be installed in one go. This makes installation easy and improves sealing effectiveness.

[0037] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will understand that various replacements, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A shaft sealing valve, comprising a valve body (2), a valve plate (3) and a sealing shaft (6), wherein the valve body (2) is formed with a valve cavity (9), the valve plate (3) is installed in the valve cavity (9), a valve body shaft hole (4) is formed at the lower end of the valve body (2), a flange (12) is installed at the lower end of the valve body shaft hole (4), the sealing shaft (6) passes through the flange (12) and is installed in the valve body shaft hole (4), and the upper end of the sealing shaft (6) is connected to the lower end of the valve plate (3); characterized in that: A shaft sleeve three (5) is installed at the lower end of the valve body shaft hole (4), and the shaft sleeve three (5) is an integrated shaft sleeve three (5). A sealing groove (8) is formed at the lower end or / and the upper end of the sealing shaft (6), and a sealing ring (7) is embedded in the sealing groove (8). After the sealing ring (7) is embedded in the sealing shaft (6), it is inserted into the integrated shaft sleeve three (5); the sealing shaft (6) is sealed and installed in the valve body shaft hole (4) through the sealing ring.

2. The shaft sealing valve according to claim 1, characterized in that: The sealing grooves (8) are 1 to N sealing grooves (8), and the sealing rings (7) are embedded in the 1 to N sealing grooves.

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