Sealing structure for valve rod and valve cover of ammonia valve

Abstract

The utility model belongs to the technical field of ammonia valves, and particularly relates to an ammonia valve rod and valve cover sealing structure which comprises a valve rod body and a hand wheel, one end of the valve rod body is detachably connected with the hand wheel through a connecting assembly, an anti-losing assembly is arranged between the valve rod body and the hand wheel, and the connecting assembly comprises a first positioning groove, a second positioning groove and a third positioning groove. The first positioning groove is formed in one end of the hand wheel, the iron plate is fixedly installed at one end of the valve rod body and inserted into the first positioning groove, the magnet is fixedly installed in the first positioning groove, the iron plate is attracted to the magnet, the cross section of the first positioning groove is square, and the cross section of the iron plate is square. The hand wheel is detachably connected to the valve rod body through the connecting assembly, the hand wheel can be separated from the valve rod body when the valve rod body is not rotated, and then the situation that the valve rod rotates due to personnel errors can be avoided to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia valves, in particular to a sealing structure of an ammonia valve stem and a valve cover. Background Art

[0002] Ammonia valve is a commonly used component in refrigeration equipment. Its function is to control the flow or blockage of refrigerant by closing and opening the ammonia valve during the use of refrigerant in the refrigeration system. After passing through the ammonia valve, the refrigerant enters the output pipeline to complete the normal delivery or circulation of the refrigerant. When the delivery or circulation needs to be blocked, the hand wheel is rotated to close the valve flap and the outlet, and the refrigerant is blocked by the valve flap and will not be output from the outlet. When the valve blocks the refrigerant, no leakage is allowed. In the production process of ammonia valve, since the valve body often works under the high pressure of the refrigerant and the refrigerant is highly volatile, the sealing of the valve body itself is very important. The upper seal of the existing ammonia valve stem and the valve cover adopts a hard seal between the conical surface of the valve stem and the arc surface of the valve cover. Since the operating conditions of the ammonia valve are relatively harsh, the hard seal will produce a poor seal during long-term use, causing ammonia leakage.

[0003] The existing patent CN208138572U discloses a sealing structure of an ammonia valve stem and a valve cover. Although the patent can solve the above problems, there is a phenomenon in the patent that the valve stem rotates in the event of an error, such as accidentally touching the hand wheel. Therefore, an ammonia valve stem and a valve cover sealing structure is invented. Utility Model Content

[0004] In view of the above problems and / or the problems existing in the existing sealing structure between the valve stem and the valve cover of an ammonia valve, the present utility model is proposed.

[0005] Therefore, the purpose of the present invention is to provide a sealing structure of an ammonia valve stem and a valve cover, which can solve the above-mentioned existing problems.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] An ammonia valve stem comprises a stem body and a hand wheel, one end of the stem body is detachably connected to the hand wheel via a connecting assembly, and an anti-loss assembly is provided between the stem body and the hand wheel.

[0008] As a preferred solution of an ammonia valve stem described in the utility model, the connecting component is:

[0009] A first positioning groove, wherein the first positioning groove is formed on one end of the hand wheel;

[0010] An iron plate, the iron plate is fixedly mounted on one end of the valve stem body, and the iron plate is inserted into the first positioning groove;

[0011] The magnet is fixedly installed in the first positioning groove, and the iron plate is adsorbed on the magnet.

[0012] As a preferred solution of the ammonia valve stem of the utility model, wherein: the cross section of the first positioning groove is set to be square, and the cross section of the iron plate is set to be square.

[0013] As a preferred solution of an ammonia valve stem described in the utility model, the connecting component is:

[0014] A second positioning groove, wherein the second positioning groove is formed on one end of the hand wheel;

[0015] A positioning block is fixedly mounted on one end of the valve stem body and is inserted into the second positioning groove.

[0016] As a preferred solution of the ammonia valve stem of the utility model, the cross section of the second positioning groove is set to be square, and the cross section of the positioning block is set to be square.

[0017] As a preferred solution of an ammonia valve stem described in the utility model, the anti-loss component includes:

[0018] A first semicircular ring, wherein the first semicircular ring is fixedly mounted on the bottom of the hand wheel;

[0019] A second semicircular ring, wherein the second semicircular ring is fixedly mounted on the bottom of one end of the valve stem body;

[0020] A nylon rope, one end of which is fixedly connected to the first semicircular ring, and the other end of which is fixedly connected to the second semicircular ring.

[0021] A valve cover sealing structure comprises a valve cover and a valve stem body, wherein the valve stem body is threadedly connected in the valve cover, one end of the valve cover is set as a valve cover cone surface, one end of the valve stem body is provided with a valve stem cone surface matching the valve cover cone surface, a sealing ring is provided on the valve cover cone surface, and a sealing ring cone surface is provided on the side of the sealing ring facing the valve stem cone surface to increase the contact area between the sealing ring and the valve stem cone surface.

[0022] Compared with existing technologies:

[0023] 1. The handwheel is detachably connected to the valve stem body by setting a connecting assembly, so that the handwheel and the valve stem body can be separated when the valve stem body is not rotated, thereby avoiding the valve stem from rotating due to human error to a certain extent.

[0024] 2. By setting up the anti-loss component, it can prevent people from discarding the handwheel everywhere, and it can also make it easier for people to find the handwheel quickly, which improves convenience to a certain extent.

[0025] 3. By arranging a sealing ring conical surface on the side of the sealing ring facing the valve stem conical surface, the contact area between the sealing ring and the valve stem conical surface can be increased, thereby improving the sealing effect to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic front view of the structure of Embodiment 1 of the utility model;

[0027] Figure 2 For this utility model Figure 1 A schematic diagram of the structure enlargement in the middle;

[0028] Figure 3 This is a schematic diagram of the sealing ring structure of the utility model;

[0029] Figure 4 This is a schematic diagram of the iron plate and magnet structure of the utility model;

[0030] Figure 5 It is a front view schematic diagram of the structure of Example 2 of the utility model.

[0031] In the figure: valve stem body 10, valve stem conical surface 11, hand wheel 20, first positioning groove 30, iron plate 31, magnet 32, second positioning groove 36, positioning block 37, first semicircular ring 40, second semicircular ring 41, nylon rope 42, valve cover 50, valve cover conical surface 51, sealing ring 52, sealing ring conical surface 53. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Embodiment 1:

[0034] The utility model provides an ammonia valve stem, please refer to Figure 1-Figure 4 , including a valve stem body 10 and a handwheel 20 , one end of the valve stem body 10 is detachably connected to the handwheel 20 through a connecting component, and an anti-loss component is provided between the valve stem body 10 and the handwheel 20 .

[0035] The connecting components are: a first positioning groove 30, an iron plate 31, a magnet 32, a second positioning groove 36, and a positioning block 37;

[0036] The first positioning groove 30 is provided on one end of the hand wheel 20, the iron plate 31 is fixedly mounted on one end of the valve stem body 10, and the iron plate 31 is inserted into the first positioning groove 30, the magnet 32 ​​is fixedly mounted in the first positioning groove 30, and the iron plate 31 is adsorbed on the magnet 32, the cross section of the first positioning groove 30 is set to be square, and the cross section of the iron plate 31 is set to be square, wherein the suction force between the iron plate 31 and the magnet 32 ​​can be set according to demand, as long as it is difficult to separate the iron plate 31 and the magnet 32 ​​in the absence of external force.

[0037] The anti-loss assembly includes: a first semicircular ring 40, a second semicircular ring 41, and a nylon rope 42;

[0038] The first semicircular ring 40 is fixedly mounted on the bottom of the handwheel 20, the second semicircular ring 41 is fixedly mounted on the bottom of one end of the valve stem body 10, one end of the nylon rope 42 is fixedly connected to the first semicircular ring 40, and the other end of the nylon rope 42 is fixedly connected to the second semicircular ring 41, wherein the length of the nylon rope 42 can be set according to demand.

[0039] A valve cover sealing structure includes a valve cover 50 and a valve stem body 10. The valve stem body 10 is threadedly connected to the valve cover 50. One end of the valve cover 50 is set as a valve cover cone surface 51. One end of the valve stem body 10 is provided with a valve stem cone surface 11 matching the valve cover cone surface 51. A sealing ring 52 is provided on the valve cover cone surface 51. A sealing ring cone surface 53 is provided on the side of the sealing ring 52 facing the valve stem cone surface 11 to increase the contact area between the sealing ring 52 and the valve stem cone surface 11.

[0040] Working principle: When the valve stem body 10 needs to be rotated, the hand wheel 20 is held to insert the iron plate 31 into the first positioning groove 30 until the iron plate 31 is adsorbed on the magnet 32. At this time, the valve stem body 10 can be rotated by the hand wheel 20. After use, the iron plate 31 and the first positioning groove 30 can be separated. At this time, the position of the hand wheel 20 is limited by the action of the nylon rope 42.

[0041] Embodiment 2:

[0042] The utility model provides an ammonia valve stem, please refer to Figure 5 ;

[0043] The connecting components are: a second positioning groove 36 and a positioning block 37;

[0044] The second positioning groove 36 is formed on one end of the hand wheel 20 , the positioning block 37 is fixedly mounted on one end of the valve stem body 10 , and the positioning block 37 is inserted into the second positioning groove 36 , the cross section of the second positioning groove 36 is formed in a square shape, and the cross section of the positioning block 37 is formed in a square shape.

[0045] Working principle: When the valve stem body 10 needs to be rotated, the hand wheel 20 is held to insert the positioning block 37 into the second positioning groove 36, and the valve stem body 10 can be rotated by the hand wheel 20. After use, the second positioning groove 36 and the positioning block 37 can be separated, and the position of the hand wheel 20 is limited by the action of the nylon rope 42.

[0046] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An ammonia valve stem, comprising a stem body (10) and a hand wheel (20), characterized in that: One end of the valve stem body (10) is detachably connected to the hand wheel (20) via a connecting assembly, and an anti-loss assembly is provided between the valve stem body (10) and the hand wheel (20).

2. The ammonia valve stem according to claim 1, characterized in that: The connection components are: A first positioning groove (30), wherein the first positioning groove (30) is formed on one end of the hand wheel (20); An iron plate (31), the iron plate (31) being fixedly mounted on one end of the valve stem body (10), and the iron plate (31) being inserted into the first positioning groove (30); A magnet (32), wherein the magnet (32) is fixedly mounted in the first positioning groove (30), and the iron plate (31) is adsorbed on the magnet (32).

3. The ammonia valve stem according to claim 2, characterized in that: The cross section of the first positioning groove (30) is set to be a square, and the cross section of the iron plate (31) is set to be a square.

4. The ammonia valve stem according to claim 1, characterized in that: The connection components are: A second positioning groove (36), wherein the second positioning groove (36) is formed on one end of the hand wheel (20); A positioning block (37) is fixedly mounted on one end of the valve stem body (10), and the positioning block (37) is inserted into the second positioning groove (36).

5. The ammonia valve stem according to claim 4, characterized in that: The cross section of the second positioning groove (36) is set to be a square, and the cross section of the positioning block (37) is set to be a square.

6. The ammonia valve stem according to claim 1, characterized in that: The anti-loss component comprises: A first semicircular ring (40), wherein the first semicircular ring (40) is fixedly mounted on the bottom of the hand wheel (20); A second semicircular ring (41), the second semicircular ring (41) being fixedly mounted on the bottom of one end of the valve stem body (10); A nylon rope (42), one end of which is fixedly connected to the first semicircular ring (40), and the other end of which is fixedly connected to the second semicircular ring (41).

7. A valve cover sealing structure, comprising a valve cover (50) and a valve stem body (10) according to claims 1 to 6, wherein the valve stem body (10) is threadedly connected to the valve cover (50), one end of the valve cover (50) is set as a valve cover cone surface (51), one end of the valve stem body (10) is provided with a valve stem cone surface (11) matching the valve cover cone surface (51), and a sealing ring (52) is provided on the valve cover cone surface (51), characterized in that: A sealing ring conical surface (53) is provided on the side of the sealing ring (52) facing the valve stem conical surface (11) so as to increase the contact area between the sealing ring (52) and the valve stem conical surface (11).

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