Valve rod and filling valve

Abstract

The utility model relates to a valve rod and a filling valve. The valve stem includes a body portion and an annular sleeve integrally formed on an outer circumferential surface of the body portion and including a plurality of protrusions spaced apart from each other. The axial height of the annular sleeve is 20%-60% of the axial height of the body part. The filling valve comprises the valve rod. According to the valve rod and the filling valve, the axial height of the annular sleeve on the valve rod is shortened, so that the axial height of a narrow gap between the outer peripheral surface of the annular sleeve of the valve rod and the inner peripheral wall of the valve body is reduced, and the cleaning difficulty of the filling valve is reduced.

Description

Technical Field

[0001] The utility model relates to the field of filling, and more particularly to a valve stem of a filling valve used for filling and a filling valve with the valve stem. Background Art

[0002] The contents of this section merely provide background information related to the present invention and may not constitute prior art.

[0003] During the operation of the filling system, a filling valve is provided on the flow path of the fluid (e.g., juice or milk drink) to adjust and control the flow rate of the fluid. During the filling process, the fluid flows through the filling valve to be delivered to the product container. In order to ensure cleanliness and hygiene, the flow pipeline and the filling valve are usually cleaned after the filling is completed to prevent the fluid components in the previous filling process from remaining in the flow pipeline or the filling valve and contaminating the fluid of the next filling. As the device that the fluid must pass through during the filling process, the cleaning of the filling valve is particularly important.

[0004] In addition, during operation, the valve stem of the filling valve moves axially in the valve body under the action of the transmission rod connected to the motor output, and the sealing plate of the valve stem is connected to the end of the valve stem body of the valve stem, and the valve stem body is subjected to stress. The valve stem body is usually made of PEEK material. The valve stem body is prone to creep deformation due to long-term stress during operation, which is easy to cause leakage, so that the fluid may enter the interior of the valve stem body, causing contamination of the filling valve and damage to the components inside the valve stem body. Utility Model Content

[0005] An object of the present invention is to solve at least one of the above problems.

[0006] One aspect of the utility model is to provide a valve stem, comprising: a body portion; an annular sleeve, the annular sleeve is integrally formed on the outer circumference of the body portion and comprises a plurality of protrusions spaced apart from each other. The axial height of the annular sleeve is 20%-60% of the axial height of the body portion.

[0007] In one embodiment, an axially upper end surface of the protrusion is formed as an inclined surface which is inclined radially outward and axially downward.

[0008] In one embodiment, the inclined surface is a curved surface.

[0009] Preferably, the axial lower end surface of the protrusion is formed to be inclined radially outward and axially upward.

[0010] The valve stem is a hollow structure and further includes a metal insert which is inserted into and fitted in the valve stem.

[0011] The valve stem further comprises a sealing plate, which comprises a plate portion and a connecting portion which are integrally formed. The connecting portion is plug-connected with the end of the metal insert.

[0012] The connecting portion includes a first portion which is plug-coupled to the end of the metal insert and a second portion which is located inside the metal insert and is to be coupled to a driver for the valve stem.

[0013] Preferably, the second portion does not contact the metal insert.

[0014] The sealing plate further comprises a sealing member, which wraps the plate portion and is connected to the end of the valve stem. One of the sealing member and the end of the valve stem is provided with an annular groove, and the other of the sealing member and the end of the valve stem is provided with an annular protrusion, which is fitted in the groove.

[0015] Preferably, the axial height of the annular sleeve is 20%-40% of the axial height of the main body.

[0016] Another aspect of the present invention is to provide a filling valve, which includes the valve stem according to the present invention.

[0017] The filling valve also includes a valve body, a valve stem located in the valve body and adapted to be driven to move in the valve body to open or close the valve hole on the valve body, and the annular sleeve cooperates with the inner wall of the valve body so that the recessed parts between adjacent protrusions form a fluid guiding part for guiding the fluid to pass through.

[0018] The utility model provides an improved valve stem and a filling valve with the valve stem. The valve stem and the filling valve of the utility model reduce the axial height of the annular sleeve on the valve stem, reduce the axial height of the narrow gap between the outer peripheral surface of the annular sleeve of the valve stem and the inner peripheral wall of the valve body, and reduce the difficulty of cleaning the filling valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following will describe the embodiments of the present invention by way of example only with reference to the accompanying drawings. In the accompanying drawings, the same features or components are represented by the same reference numerals, and the drawings are not necessarily drawn to scale, and in the accompanying drawings:

[0020] Figure 1 A partial longitudinal sectional view of a filling valve according to a first embodiment of the present utility model is shown;

[0021] Figure 2 Shows Figure 1 A partial perspective view of the valve stem of the filling valve shown in ;

[0022] Figure 3 Shows Figure 1 A front view of the valve stem shown in ;

[0023] Figure 4 A partial longitudinal sectional view of a filling valve of the related art is shown;

[0024] Figure 5 Shows Figure 4 A partial front view of a valve stem of a filling valve;

[0025] Figure 6 A partial perspective view of a valve stem of a filling valve according to a second embodiment of the present utility model is shown;

[0026] Figure 7 Shows Figure 6 A longitudinal section of the valve stem shown in ;

[0027] Figure 8 A perspective view showing a sealing plate of a valve stem of a filling valve according to a second embodiment of the present utility model;

[0028] Fig. 9 A partial perspective view of a valve stem of a filling valve according to a third embodiment of the present utility model is shown;

[0029] Fig.10 A longitudinal sectional view of a valve stem of a filling valve according to a fourth embodiment of the present utility model is shown;

[0030] Fig.11 A front view of a valve stem of a filling valve according to a fifth embodiment of the present invention is shown;

[0031] Fig.12 A longitudinal sectional view showing a filling valve according to a fifth embodiment of the present invention; and

[0032] Fig.13 A perspective view of a filling valve according to a sixth embodiment of the present invention is shown. DETAILED DESCRIPTION

[0033] The following description is merely exemplary in nature and is not intended to limit the present invention, its application and use. It should be understood that in all of the accompanying drawings, similar reference numerals indicate the same or similar parts and features. The various drawings only schematically represent the concepts and principles of the embodiments of the present invention, and do not necessarily show the specific dimensions and proportions of the various embodiments of the present invention. Specific parts in specific drawings may be exaggerated to illustrate the relevant details or structures of the embodiments of the present invention.

[0034] In the description of the embodiments of the present invention, the directional terms related to "upper", "lower", "left", and "right" are used to describe the upper, lower, left, and right positions of the views shown in the accompanying drawings. In practical applications, the positional relationships of "upper", "lower", "left", and "right" used in this document can be defined according to actual conditions, and these relationships can be reversed.

[0035] Figure 1 FIG. 2 shows a partial longitudinal section of a filling valve 100 according to a first embodiment of the present invention. Figure 1 As shown, the filling valve 100 includes a valve body 1 and a valve stem 2. The valve body 1 includes a housing 11 and a valve seat 12. The housing 11 and the valve seat 12 are sealingly engaged and define a valve cavity V internally. The valve seat 12 is provided with valve outlet passages 121, 122. The valve stem 2 is arranged in the valve cavity V of the valve body 1, and a passage for fluid to pass is formed between the inner peripheral wall of the valve body 1 and the outer peripheral wall of the valve stem 2. The valve stem 21 can be driven to move axially in the valve cavity V to close or open the valve outlet passages 121, 122. The valve stem 2 includes a valve stem body 20 and a sealing plate 27 mounted to the valve stem body 20. The sealing plate 27 includes a plate portion 271 and a connecting portion 272 formed integrally. The valve stem body 20 has a hollow structure, formed as a hollow rod, and the connecting portion 272 of the sealing plate 27 is inserted into the valve stem body 20 to be connected to the valve stem body 20. The valve stem body 20 can be made of PEEK material, for example. In addition, the sealing plate 27 also includes a sealing member 273 wrapped around the plate portion 271. When installed in place, the sealing member 273 abuts against the end of the valve stem body 20 ( Figure 1 The lower end portion in the valve stem 20 forms a seal to prevent the fluid from entering the interior of the valve stem body 20.

[0036] The transmission rod 3 connected to the output of the drive motor (not shown) via the bellows 4 is inserted into the valve stem body 20 from the axial upper end of the valve stem body 20, and is connected to the connection portion 272 of the sealing plate 27, for example, threadedly connected to the connection portion 272 of the sealing plate 27. A coupling 5 is provided between the axial upper end of the valve stem body 20 and the bellows 4. The coupling 5 includes a coupling housing 51 and a metal joint 52 embedded in the coupling housing 51, and the metal joint 52 supports and engages the transmission rod 3. The drive motor drives the transmission rod 3 to move, and with the movement of the transmission rod 3, the valve stem 2 moves axially upward in the valve cavity V to open the valve outlet channels 121, 122, thereby allowing the fluid to pass through the filling valve 100, or moves axially downward in the valve cavity V to close the valve outlet channels 121, 122, thereby preventing the fluid from passing through the filling valve 100.

[0037] Figure 2 A perspective view of a valve stem body 20 according to the valve stem 2 is shown, and Figure 3 FIG. 2 shows a front view of the valve stem body 20 of the valve stem 2. Figure 2 and Figure 3 As shown, the valve stem body 20 includes a body portion 21, a sealing plate mounting portion 23, and an annular sleeve 25. In the example shown in the figure, the body portion 21, the sealing plate mounting portion 23, and the annular sleeve 25 are all formed integrally. However, the utility model is not limited thereto, and in other examples according to the utility model, the body portion 21, the sealing plate mounting portion 23, and the annular sleeve 25 can be formed separately and assembled together to form the valve stem body 20.

[0038] The annular sleeve 25 is integrally formed on the outer circumferential surface of the body 21. The annular sleeve 25 includes a plurality of protrusions 251 spaced apart from each other in the circumferential direction of the body 21. In the example shown in the figure, the annular sleeve 25 is formed in a petal shape. However, the present invention is not limited thereto. In other examples according to the present invention, the annular sleeve 25 can be formed in any other suitable shape. When the valve stem 2 is installed in place in the valve body 1, as shown in FIG. Figure 1 As shown, the protrusion 251 of the annular sleeve 25 is close to the inner peripheral wall of the housing 11 of the valve body 1 and guides the valve body 20 to move axially in the housing 11, and the recessed portion between adjacent protrusions 251 forms a fluid guide portion. In the axial direction of the valve stem 2, the annular sleeve 25 is formed on a part of the axial height of the body portion 21, and the axial height H of the annular sleeve 25 is 20%-60%, preferably 20%-40%, more preferably 20%-30%, for example, 25% of the axial height L of the body portion 21.

[0039] like Figure 3 As best shown in the figure, the protrusion 251 includes an axial upper end face 2511 and an axial lower end face 2512 and a connecting portion 2513 located between the axial upper end face 2511 and the axial lower end face 2512. The axial upper end face 2511 is formed as an inclined surface, which is radially outward and axially downwardly inclined from the outer peripheral surface of the main body 21. In the example shown in the figure, the axial upper end face 2511 is formed as a curved surface. However, the utility model is not limited to this. In other examples according to the utility model, the axial upper end face 2511 can also be an inclined plane. Preferably, the axial lower end face 2512 is formed to be radially outward and axially upwardly inclined from the outer peripheral surface of the main body 21.

[0040] Figure 4 A partial longitudinal cross-sectional view of a filling valve 200 of the related art is shown. Figure 5A front view of a valve stem 20A of a filling valve 200 of the related art is shown. In the accompanying drawings, the same parts are represented by the same reference numerals, and their related descriptions are omitted. In the following, the difference between the filling valve 200 of the related art and the filling valve 100 according to the first embodiment of the utility model will be mainly described. The filling valve 200 of the related art is generally similar in structure to the filling valve 100 according to the utility model, and the difference lies only in the design of the valve stem 2A, more specifically, the difference lies only in the design of the valve stem body 20A of the valve stem 2A.

[0041] like Figure 4 As shown, the filling valve 200 includes a valve body 1 and a valve stem 2A. The valve stem 2A is disposed in a valve chamber V defined by a housing 11 and a valve seat 12. The valve stem 2A includes a valve stem body 20A and a sealing plate 27 mounted to the valve stem body 20A. The valve stem body 20A includes a body portion 21, a sealing plate mounting portion 23, and an annular sleeve 25A.

[0042] The annular sleeve 25A is formed on the outer circumferential surface of the body portion 21, has a petal shape, and includes a plurality of protrusions 251A spaced apart from each other in the circumferential direction of the body portion 21. The annular sleeve 25A extends over almost the entire axial height of the body portion 21. Figure 5 As shown in FIG. 1 , the protrusion 251A protrudes radially outward from the outer circumference of the body portion 21 and extends in the axial direction over almost the entire height of the body portion 21. The axial upper end surface 2511A of the protrusion 251A extends horizontally (e.g., radially outward) from the outer circumference of the body portion 21. The outer circumference of the protrusion 251A extends in the axial direction. When the valve stem 2A is installed in place in the valve body 1, as shown in FIG. Figure 4 As shown, a small radial gap is formed between the outer peripheral surface of the protrusion 251A and the inner peripheral wall of the housing 11 of the valve body 1. Since the protrusion 251A is formed over almost the entire axial height of the main body 21, the radial gap between the outer peripheral surface of the protrusion 251A of the annular sleeve 25A of the valve stem 2A and the inner peripheral wall of the housing 11 of the valve seat 1 is small over almost the entire axial height of the main body 21 of the valve stem body 20A of the valve stem 2A.

[0043] On the one hand, since the axial upper end surface of the protrusion 251A of the annular sleeve 25A of the valve stem 2A extends horizontally from the outer peripheral surface of the main body 21, this design makes it easy for the fibers in the fluid to hook on the upper end of the protrusion 251A during the filling process, especially when filling viscous fluids such as fiber-rich juice, so that the fluid components are easily left in the filling valve 200. On the other hand, during the filling process, the fluid will also enter and remain in the narrow gap between the protrusion 251A and the inner peripheral wall of the housing 11, especially when filling viscous fluids such as fiber-rich juice, the fibers in the fluid are also easy to hook on the protrusion 251A, and may be stuck in the narrow gap between the protrusion 251A and the inner peripheral wall of the housing 11. Due to the large axial height of the narrow gap, it is difficult to rinse the fluid components remaining in the narrow gap. Therefore, the above-mentioned design of the valve stem 2A increases the difficulty of cleaning the filling valve 200.

[0044] Different from this, in the filling valve 100 according to the first embodiment of the present invention, the annular sleeve 25 of the valve stem 2 is formed only on a part of the axial height of the main body 21 of the valve stem body 20 of the valve stem 2, and the axial height of the annular sleeve 25 is 20%-60% of the axial height of the main body 21. Therefore, compared with the filling valve 200 of the related art, in the filling valve 100 with the valve stem 2 according to the present invention, the axial height of the narrow gap formed between the protrusion 251 of the annular sleeve 25 and the inner peripheral wall of the housing 11 is significantly reduced, so that it is easy to flush the fluid components remaining between the protrusion 251 and the inner peripheral wall of the housing 11. Furthermore, the axial upper end surface 2511 and the axial lower end surface 2512 of the protrusion 251 are both formed as inclined surfaces. When installed in place, a narrow gap is only formed between the connecting portion 2513 of the protrusion 251 and the inner peripheral wall of the housing 11, thereby further reducing the axial height of the narrow gap formed between the protrusion 251 of the annular sleeve 25 and the inner peripheral wall of the housing 11, which is further conducive to the cleaning of the filling valve 100. In addition, the axial upper end surface 2511 of the protrusion 251 is formed to be radially outward and axially downwardly inclined from the outer peripheral surface of the body 21, so that even when filling a viscous fluid such as a fiber-rich juice, the fibers in the fluid are not easily hooked on the protrusion 251, which is further conducive to the cleaning of the filling valve 100.

[0045] The above shows the design of the filling valve 100 and the valve stem 2 according to the first embodiment of the utility model. The filling valve 100 and the valve stem 2 according to the first embodiment of the utility model reduce the difficulty of cleaning the filling valve 100 by shortening the axial height of the annular sleeve 25 on the valve stem 2. And, preferably, through the above-mentioned improved design of the protrusion 251 of the annular sleeve 25, the difficulty of cleaning the filling valve 100 is further reduced.

[0046] Figures 6 to 8The valve stem 2B of the filling valve according to the second embodiment of the present utility model is shown, wherein: Figure 6 A perspective view showing a portion of the valve stem 2B, Figure 7 A longitudinal section of a portion of the valve stem 2B is shown, Figure 8 The sealing plate 27B of the valve stem 2B is shown. In the drawings, the same parts are indicated by the same reference numerals, and the relevant description thereof is omitted. In the following, the difference between the valve stem 2B according to the second embodiment of the utility model and the valve stem 2 according to the first embodiment of the utility model will be mainly described. The valve stem 2B according to the second embodiment of the utility model has a substantially same outer contour design as the valve stem 2 according to the first embodiment of the utility model, except that the valve stem 2B according to the second embodiment of the utility model further includes a metal insert 24.

[0047] like Figure 6 and Figure 7 As shown, the valve stem body 20B has a structure substantially similar to the valve stem body 20 of the valve stem 2 according to the first embodiment of the present invention, including a main body portion 21, a sealing plate mounting portion 23B and an annular sleeve 25, and has substantially the same outer contour as the valve stem body 20 of the valve stem 2.

[0048] like Figure 6 and Figure 7 As shown in the figure, the metal insert 24 is a hollow tubular member, which is inserted and fitted into the valve stem body 20B. The metal insert 24 penetrates almost the entire axial height of the valve stem body 20B. In the example shown in the figure, the outer periphery of the metal insert 24 is formed with a first shoulder portion 241 and a second shoulder portion 242 spaced apart from each other in the axial direction, and the first shoulder portion 241 and the second shoulder portion 242 respectively cooperate with corresponding shoulders on the inner circumferential surface of the valve stem body 20, as shown in the figure. Figure 7As shown. Between the first shoulder portion 241 and the second shoulder portion 242, the metal insert 24 has a non-circular cross-section and cooperates with the corresponding portion of the body portion 21. In the example shown in the figure, between the first shoulder portion 241 and the second shoulder portion 242, the insert 24 is formed with a recessed portion, for example, by cutting off a portion of the circular outer peripheral portion. And correspondingly, in the corresponding portion of the body portion 21, the inner peripheral surface of the body portion 21 is formed with a protrusion. When installed in place, the recessed portion of the metal insert 24 located between the first shoulder portion 241 and the second shoulder portion 242 cooperates with the corresponding protrusion on the inner peripheral surface of the body portion 21, so that the metal insert 24 can be prevented from rotating relative to the body portion 21. The inner cavity of the metal insert 24 includes a first hollow portion 243, a second hollow portion 244 and a third hollow portion 245. In the example shown in the figure, the first hollow portion 243 has a square cross section, the second hollow portion 244 and the third hollow portion 245 have circular cross sections, and the inner diameter of the second hollow portion 244 is larger than the inner diameter of the third hollow portion 245. When installed in place, the transmission rod (e.g., Figure 1 The transmission rod 3) shown in FIG. 2 is inserted into the metal insert 24 from the upper end portion of the valve stem body 20B, and the sealing plate 27B is coupled to the sealing plate mounting portion 23B of the valve stem body 20B.

[0049] Figure 8 2 shows a perspective view of a sealing plate 27B of a valve stem 2. The sealing plate 27B includes a plate portion, a connecting portion 272B, and a sealing member 273B, wherein the plate portion is enclosed in the sealing member 273B and is not visible in the figure. The sealing plate 27B is mounted to the end of the valve stem 2. Specifically, the sealing plate 27B is inserted from the axial lower end of the valve stem 2 and is coupled to the metal insert 24, and is connected to the transmission rod (e.g., Figure 1 The connecting portion 272B includes a first portion 2721B and a second portion 2722B. When installed in place, the connecting portion 272B is plug-connected to the end of the metal insert 24 and connected to the transmission rod. Specifically, the first portion 2721B of the connecting portion 272B is plug-connected to the first hollow portion 243 located at the end of the metal insert 24, and the second portion 272B of the connecting portion 272B is located in the second hollow portion 244 of the metal insert 24 and connected to the driver for the valve stem (for example, Figure 1 The transmission rod 3) shown in is connected.

[0050] The cross-section of the first portion 2721B is adapted to the cross-section of the first hollow portion 243 of the metal insert 24. In the example shown in the figure, the first hollow portion 243 has a square cross-section, and the first portion 2721B of the connecting portion 272B of the sealing plate 27B also has a square cross-section accordingly, so that the first portion 2721B is cooperatively connected with the first hollow portion 243, which can limit the rotation of the sealing plate 27B relative to the valve stem body 20B. However, the present invention is not limited to this, as long as the cross-section of the first portion 2721B and the cross-section of the first hollow portion 243 are adapted to each other. In other examples according to the present invention, the cross-sections of the first hollow portion 243 and the first portion 2721B can have other suitable shapes, for example, they can have other polygonal shapes. The second portion 2722B is configured to be connected to a transmission rod (for example, Figure 1 For example, the second portion 2722B is provided with an internal thread, which is suitable for engaging with an external thread on the end of the transmission rod.

[0051] Compared with the related design of connecting the sealing plate with the valve stem body made of PEEK material, the valve stem 2B can reduce the force on the external valve stem body 20B by providing the metal insert 24 and plugging the sealing plate 27 with the metal insert 24, thereby preventing the valve stem body 20B from leaking due to creep deformation caused by excessive force, thereby preventing the fluid from entering the interior of the valve stem body 20B and causing contamination and / or corrosion to the transmission rod in the valve stem body 20B. And preferably, the metal insert 24, the connecting portion 272B of the sealing plate 27B and the metal joint of the connecting piece installed at the axial upper end of the valve stem body 20B (for example, Figure 1 The metal joints 52 of the connecting piece 5 shown in the figure are all made of the same metal material, for example, 316L stainless steel, which can increase the radial thickness of the metal joints of the connecting piece and reduce the contact pressure.

[0052] Preferably, the outer diameter of the second part 2722B is smaller than the inner diameter of the second hollow portion 244, so that when installed in place, the second part 2722B does not contact the metal insert 24, thereby reducing the force between the second part 2722B and the transmission rod from being transmitted radially outward to the outer valve stem body 20B during operation, further reducing the force on the valve stem body 20B, and preventing deformation of the valve stem body 20B, thereby preventing leakage and other problems caused by deformation of the valve stem body.

[0053] In addition, in the valve stem 2B, one of the seal 273B and the sealing plate mounting portion 23B of the valve stem body 20B is provided with an annular protrusion, and the other of the seal 273B and the sealing plate mounting portion 23B of the valve stem body 20B is provided with an annular groove. When installed in place, the protrusion fits in the groove. Through the cooperation of the protrusion and the groove, a reliable seal can be formed between the sealing plate mounting portion 23B of the valve stem body 20B and the seal 273B, which can further effectively prevent the fluid from entering the valve stem body 20B. Figure 7 and Figure 8 In the example shown in , the end surface of the sealing plate mounting portion 23 of the valve stem body 20B is formed with an annular protrusion 231, and the surface of the end of the sealing member 273B facing the valve stem body 20B is provided with an annular groove 2733. However, the present invention is not limited thereto. In other examples according to the present invention, an annular groove may be formed on the end surface of the sealing plate mounting portion 23 of the valve stem body 20B, and a corresponding annular protrusion may be provided on the surface of the end of the sealing member 273B facing the valve stem body 20B.

[0054] The valve stem 2B according to the second embodiment of the utility model and the filling valve having the valve stem 2B can achieve the above-mentioned beneficial technical effects similar to the valve stem 2 and the filling valve 100 according to the first embodiment of the utility model. In addition, the valve stem 2B according to the second embodiment of the utility model and the filling valve having the valve stem 2B can also reduce the force on the valve stem body 20B by providing the metal insert 24, and avoid the deformation of the valve stem body 20B and the leakage and other problems. Moreover, the valve stem 2B according to the second embodiment of the utility model and the filling valve having the valve stem 2B can form a reliable seal between the end of the valve stem body and the sealing plate 27B by making the end of the valve stem body (i.e., the end of the sealing plate mounting portion 23B) and the sealing plate 27B cooperate and install in the form of a protrusion and a groove, thereby preventing the fluid from entering the valve stem body.

[0055] Fig. 9 A three-dimensional view of a valve stem 2C of a filling valve according to a third embodiment of the present invention is shown, wherein a sealing plate of the valve stem 2C is not shown. In the accompanying drawings, identical parts are denoted by identical reference numerals, and their related descriptions are omitted. In the following, the difference between the valve stem 2C according to the third embodiment of the present invention and the valve stem 2 according to the first embodiment of the present invention will be mainly described.

[0056] The valve stem 2C according to the third embodiment of the present invention has a substantially similar outer contour design to the valve stem 2 according to the first embodiment of the present invention, except that the valve stem 2C according to the third embodiment of the present invention further includes a toothed member 261 and a key-shaped member 262. The toothed member 261 is disposed at the axial upper end of the body portion 21C of the valve stem body 20C and cooperates with the inner circumferential surface of the body portion 21C. The inner circumference of the toothed member 261 is provided with a plurality of teeth, which is conducive to the connection between the valve stem 2C and the transmission rod (for example, Figure 1 A reliable connection is formed between the transmission rod 3) shown in the figure, which is conducive to the effective transmission of power and prevents the torque from being reduced. In addition, a concave portion is formed on the outer periphery of the toothed member 261, and a corresponding concave portion is also provided on the inner periphery of the main body portion 21C of the valve stem body 20C. When installed in place, the concave portion on the outer periphery of the toothed member 261 is aligned with the concave portion on the inner periphery of the main body portion 21C to form a keyway, and the keyed member 262 is inserted into the keyway, thereby preventing the toothed member 261 from rotating relative to the main body portion 21C.

[0057] The valve stem 2C according to the third embodiment of the present invention and the filling valve including the valve stem 2C can achieve the above-mentioned beneficial technical effects similar to the valve stem 2 according to the first embodiment of the present invention and the filling valve 100. In addition, the valve stem 2C according to the third embodiment of the present invention and the filling valve including the valve stem 2C can also prevent the torque from being reduced, and can achieve effective transmission of power.

[0058] Fig.10 A longitudinal sectional view of a valve stem 2D of a filling valve according to a fourth embodiment of the present invention is shown. In the accompanying drawings, identical parts are denoted by identical reference numerals, and their related descriptions are omitted. Hereinafter, the difference between the valve stem 2D according to the fourth embodiment of the present invention and the valve stem 2 according to the first embodiment of the present invention will be mainly described.

[0059] The valve stem 2D according to the fourth embodiment of the present invention is of a substantially similar design to the valve stem 2 according to the first embodiment of the present invention, except that the sealing plate mounting portion 23D of the valve stem 2D according to the fourth embodiment of the present invention is formed separately and is sealed and mounted to the end of the valve stem body 20D via a seal S. The sealing plate mounting portion 23D is made of metal, and preferably, the sealing plate mounting portion 23D and the connecting portion 272 of the sealing plate 27 are made of the same metal, for example, both are made of 316L stainless steel. In addition, the valve stem 2D further includes a key-shaped member 28. When installed in place, the key-shaped member 28 is disposed in the upper portion of the body portion 21D of the valve stem body 20D, partially located in a recess formed on the inner peripheral wall of the body portion 21D, and partially mounted to a corresponding recess on the transmission rod.

[0060] The valve stem 2D according to the fourth embodiment of the present invention and the filling valve including the valve stem 2D can achieve the above-mentioned beneficial technical effects similar to the valve stem 2 according to the first embodiment of the present invention and the filling valve 100. In addition, the valve stem 2D according to the fourth embodiment of the present invention and the filling valve including the valve stem 2D can reduce the force on the valve stem body 20D by providing a metal sealing plate mounting portion 23D and connecting the sealing plate 27 with the metal sealing plate mounting portion 23D, thereby preventing the valve stem body 20D from being deformed due to the force and causing the above-mentioned leakage.

[0061] Fig.11 A front view showing a valve stem 2E of a filling valve according to a fifth embodiment of the present invention, and Fig.12 A longitudinal sectional view of a filling valve 100E according to a fifth embodiment of the present invention is shown. In the accompanying drawings, identical parts are denoted by identical reference numerals, and their related descriptions are omitted. Hereinafter, the difference between the valve stem 2E according to the fifth embodiment of the present invention and the valve stem 2 according to the first embodiment of the present invention will be mainly described.

[0062] The valve stem 2E according to the fifth embodiment of the present invention has a substantially similar structure to the valve stem 2 according to the first embodiment of the present invention, and the difference lies only in the design of the annular sleeve 25E of the valve stem body 20E. Fig.11 As shown in the figure, the valve stem body 20E of the valve stem 2E includes a body portion 21, a sealing plate connecting portion 23, and an annular sleeve 25E. The annular sleeve 25E extends over almost the entire axial height of the body portion 21, and the outer peripheral surface of the protrusion 251E of the annular sleeve 25E is formed as an inclined surface, which is radially outward and axially upward inclined from the outer peripheral surface of the body portion 21 at the axial lower end portion of the body portion 21, and extends toward the axial upper end portion of the body portion 21. The outer peripheral surface of the protrusion 251E is formed as the axial lower end surface of the protrusion 251E.

[0063] like Fig.12 As shown, when installed in place, only a narrow gap is formed between the upper end of the protrusion 251E and the inner peripheral wall of the housing 11 of the valve body 1. Therefore, compared with the filling valve of the related art, for example Figure 4 Compared with the filling valve 200 shown in the drawing, the axial height of the narrow gap between the protrusion 251E and the inner circumferential wall of the housing 11 is significantly shortened, which reduces the difficulty of cleaning the filling valve 100E and facilitates the cleaning of the filling valve 100E.

[0064] The valve stem 2E according to the fifth embodiment of the present invention and the filling valve 100E including the valve stem 2E can achieve the above-mentioned beneficial technical effects similar to the valve stem 2 according to the first embodiment of the present invention and the filling valve 100. And preferably, the axial upper end surface of the protrusion 251E is designed to be radially outward and axially downwardly inclined from the outer peripheral surface of the body part 21, so that during the filling process, the fibers in the fluid are not easy to hook on the protrusion 251E.

[0065] Fig.13 A front view of a valve stem 2F of a filling valve according to a sixth embodiment of the present invention is shown, wherein a sealing plate is not shown. In the accompanying drawings, identical parts are denoted by identical reference numerals, and their related descriptions are omitted. Hereinafter, the difference between the valve stem 2F according to the sixth embodiment of the present invention and the valve stem 2 according to the first embodiment of the present invention will be mainly described.

[0066] The valve stem 2F according to the sixth embodiment of the present invention differs from the valve stem 2 according to the first embodiment of the present invention only in the design of the annular sleeve 25F of the valve stem 2F. Fig.13 As shown, the valve stem body of the valve stem 2F includes a body portion 21F, a sealing plate connecting portion 23 and an annular sleeve 25F. The annular sleeve 25F extends over most of the axial height of the body portion 21F, and the axial upper end surface of the protrusion 251F of the annular sleeve 25F is formed to be radially outward and axially downwardly inclined from the outer peripheral surface of the body portion 21F. The axial upper end surface of the protrusion 251F of the annular sleeve 25F forms a smooth conical surface with the outer peripheral surface at the upper end of the body portion 21F. The axial lower end surface 2512F of the protrusion 251F is formed to extend radially inward toward the outer peripheral surface of the body portion 21F and axially downward. The axial lower end surface of the protrusion 251F of the annular sleeve 25F forms a smooth conical surface with the outer peripheral surface at the lower end of the body portion 21F. The outer peripheral surface 2513F of the protrusion 251F extends almost over most of the axial height of the body portion 21F in the axial direction. Through the above-mentioned design of the annular sleeve 25F and the main body 21F, during the filling process, the fibers in the fluid will slide along the axial upper end surface of the protrusion 251F, and will not easily get hooked on the protrusion 251F, thereby reducing the possibility of fibers in the fluid remaining in the filling valve and facilitating the cleaning of the filling valve.

[0067] Here, the valve stem of the filling valve of the utility model and the exemplary embodiment of the filling valve having the valve stem have been described in detail, but it should be understood that the utility model is not limited to the specific embodiments described and shown in detail above. Without departing from the main purpose and scope of the utility model, those skilled in the art can make various modifications and variations to the utility model. All these modifications and variations fall within the scope of the utility model. Moreover, all the components described herein can be replaced by other technically equivalent components.

Claims

1. A valve stem, comprising: Body part; an annular sleeve, the annular sleeve is integrally formed on the outer peripheral surface of the body portion and includes a plurality of protrusions spaced apart from each other, The invention is characterized in that the axial height of the annular sleeve is 20%-60% of the axial height of the main body.

2. The valve stem according to claim 1, characterized in that: An axially upper end surface of the protrusion is formed as an inclined surface that is inclined radially outward and axially downward.

3. The valve stem according to claim 2, characterized in that: The inclined surface is a curved surface.

4. The valve stem according to claim 1, characterized in that: The axial lower end surface of the protrusion is formed to be inclined radially outward and axially upward.

5. The valve stem according to claim 1, characterized in that: The valve stem is a hollow structure, and the valve stem further comprises a metal insert, which is inserted into and fitted in the valve stem.

6. The valve stem according to claim 5, characterized in that: The valve stem further comprises a sealing plate, wherein the sealing plate comprises a plate portion and a connecting portion formed integrally; Wherein, the connecting portion is plug-connected to the end of the metal insert.

7. The valve stem according to claim 6, characterized in that: The connecting portion comprises: a first portion that is plug-coupled to the end of the metal insert; and A second portion is located inside the metal insert and is to be coupled to a driver for the valve stem.

8. The valve stem according to claim 7, characterized in that: The second portion does not contact the metal insert.

9. The valve stem according to claim 6, characterized in that: The sealing plate further includes a sealing member that wraps around the plate portion and is coupled to an end of the valve stem; Wherein, one of the seal and the end of the valve stem is provided with an annular groove, and the other of the seal and the end of the valve stem is provided with an annular protrusion, and the protrusion is fitted in the groove.

10. The valve stem according to any one of claims 1 to 9, characterized in that The axial height of the annular sleeve is 20%-40% of the axial height of the main body.

11. A filling valve, characterized in that Comprising the valve stem according to any one of claims 1-10.

12. The filling valve according to claim 11, characterized in that: The filling valve also includes a valve body, the valve stem is located in the valve body and is suitable for being driven to move in the valve body to open or close the valve hole on the valve body, and the annular sleeve cooperates with the inner wall of the valve body so that the recessed portion between adjacent protrusions forms a fluid guiding portion for guiding the fluid to pass through.

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