Hydrant and method for disassembly of a spindle arrangement from a hydrant

Abstract

The invention relates to a hydrant (10) having a riser pipe (14) and a main valve (16). The main valve (16) comprises a main valve body (18), a sealing seat (20) which can be sealed with respect to the main valve body (18), a valve rod connected at one end to the main valve body (18), and a spindle arrangement (12). The spindle arrangement (12) contains a journal / journal bearing means arrangement, comprising at least one journal (54', 54'') and at least one journal bearing means, wherein the journal bearing means has a first bearing means (58', 58'') and a second bearing means (60', 60'') against each of which the journal (54', 54'') can be brought into contact.

Description

[0001] The present invention relates to a hydrant according to the preamble of claim 1 and a method for disassembling a spindle assembly from a hydrant.

[0002] Hydrants are connected to a water distribution system and represent a valve for withdrawing water, allowing the fire department, as well as public and private users, to draw water from the public water distribution system. The network pressure in the water distribution system is typically approximately 6 to 9 bar. Hydrants are generally divided into two types: pillar hydrants and underground hydrants. The pillar hydrant is permanently installed above ground and has outlets with standardized couplings. The underground hydrant is installed underground and concealed from above by a ground cover. Thus, the underground hydrant is a water extraction point located below ground level, which is closed off by the ground cover.

[0003] Hydrants comprise a riser pipe with an interior and an exterior, with the interior leading into the water intake connection. To open and close hydrants, they are equipped with a main valve comprising a main valve body and a sealing seat that can be sealed with the main valve body. The main valve body is connected to one end of a valve rod, by means of which the main valve body can be moved axially up and down. For this purpose, a spindle assembly is provided, which comprises a spindle cover that can be attached to the riser pipe, a spindle rotatably mounted on the spindle cover, and a spindle nut coupled to the valve rod at another end. The spindle and spindle nut are in threaded engagement with each other. The spindle assembly converts a torque applied to the spindle into an axial adjustment of the valve rod and thus of the main valve body.

[0004] Over time, the hydrant requires an overhaul, e.g. an overhaul of the main valve, replacement of the main valve body, cleaning of the valve seat, replacement of other components, etc.

[0005] To disassemble the spindle assembly or main valve, it is common practice to cut off the water supply to the hydrant, e.g., by isolating it from the water supply using an upstream shut-off device, such as a gate valve. As soon as the water pressure at the hydrant is no longer present, the spindle cover is released from the riser pipe, e.g., by loosening the screws. The spindle assembly or main valve can then be removed upwards from the riser pipe by applying a pulling force to, for example, the spindle cover. However, the main valve body is tightly seated against the sealing seat.

[0006] This problem is known in the state of the art and occurs particularly in hydrants in which the main valve is sealed by radial compression with the sealing seat.

[0007] There are known methods for dismantling the spindle assembly or main valve from the hydrant, in which screws are placed between the riser pipe and the spindle cover. The spindle assembly is then turned using its coupling element, e.g. a square drive, in order to pull the main valve body out of the sealing seat. Known methods for installing the spindle assembly or main valve in the hydrant have proven to be similarly laborious. These involve using separate, extended screws which are inserted through screw holes in the spindle cover and screwed into threads in the riser pipe. The spindle cover is then lowered piece by piece by tightening the screws, or brought closer to the riser pipe. The screws must be turned alternately to prevent jamming.

[0008] The documents DE4243756A and CH01381B show a hydrant of this type and its dismantling.

[0009] A disadvantage of prior art methods for the aforementioned disassembly and assembly of the spindle assembly or main valve is that these procedures are cumbersome and time-consuming, can lead to jamming, and require the use of separate tools and screws. Furthermore, the work must be carried out in areas of the hydrant that are usually difficult to access.

[0010] The object of the present invention is to provide a hydrant and a method for disassembling a spindle assembly from a hydrant, which do not have the disadvantages mentioned above.

[0011] This object is achieved by a hydrant having the features specified in claim 1. Advantageous embodiments and a method for disassembling a spindle assembly from a hydrant are specified in further claims.

[0012] A hydrant according to the invention comprises a riser pipe and a main valve, which includes a main valve body, a sealing seat sealable with the main valve body, a valve stem connected to the main valve body at one end, and a spindle assembly. The spindle assembly includes a spindle cover attachable to the riser pipe, a spindle rotatably mounted on the spindle cover, and a spindle nut coupled to the valve rod at another end. The spindle and the spindle nut are in mutual threaded engagement, designed to convert a torque applied to the spindle into an axial adjustment of the valve rod. The spindle assembly further includes a pin / pin support assembly comprising at least one pin and at least one pin support, wherein the pin support has a first support and a second support, against which the pin can be brought into contact.

[0013] The hydrant according to the present invention is characterized by the fact that the spindle assembly or main valve can be removed from the riser pipe via the spindle cover without the need for separate tools and simultaneously installed into the riser pipe. Furthermore, the respective procedures are self-explanatory and can be carried out quickly and easily on-site. Furthermore, the procedures can be carried out quickly and easily even on hydrants that are difficult to access.

[0014] The riser pipe is provided with at least one pin support, which has a first and second support. At least one pin is formed on the spindle cover, which can be brought into contact with the first and second support. As soon as the pin is in contact with a corresponding one of the supports, the spindle can be rotated in a direction in which the spindle arrangement or the main valve is either pushed upwards to pull the main valve body out of the sealing seat, or pressed downwards to press the main valve body into the sealing seat. For this purpose, the rotational movement is converted into the necessary translational movement by means of the spindle arrangement. The force generated here is introduced into the respective support in the riser pipe via the pin of the spindle cover.In response, as the spindle continues to rotate, the spindle nut is axially adjusted, thus axially adjusting the valve stem and the main valve body. As the main valve body is raised, it increasingly moves out of the fixed contact or radial compression with the sealing seat until a height is reached at which the main valve body is released from the sealing seat. The spindle can be rotated via an outwardly extending coupling element, e.g., a square drive, that is rigidly connected to the spindle.

[0015] In this state, the main valve can be removed upwards from the riser pipe. In the context of this application, "removal of the main valve from the riser pipe" refers to the removal of an assembly comprising: the main valve body, the valve rod connected to it, the spindle assembly coupled to it at the other end, and the spindle cover rotatably coupled to the spindle. This assembly is sometimes also referred to as the "rod assembly."

[0016] The main valve can be reinstalled into the riser pipe using a reciprocal method. The main valve body is simply pressed into the sealing seat by rotating the spindle.

[0017] In a surprisingly simple and previously unknown way, the spindle assembly already installed in the hydrant, in conjunction with the pin / pin support assembly, is used, or rather "converted," to convert the rotational movement applied to the spindle into a force between the spindle cover and the riser pipe. This force is transferred to the spindle nut of the spindle assembly, with the result that the spindle nut, the valve stem, and the main valve body can be adjusted axially. Thus, the main valve body is either raised or lowered depending on the direction of rotation of the spindle. A hydrant wrench, for example, can be used to turn the spindle; this wrench is typically used to open and close hydrants. Such a hydrant wrench is always carried during all work involving hydrants and does not need to be kept separately.

[0018] In a preferred embodiment of the hydrant, the first support and second support are offset from one another. The first support and second support can be offset from one another when viewed in the axial direction of the riser pipe. The first support and second support can be spaced from one another, likewise when viewed in the axial direction of the riser pipe. By pivoting the spindle cover, for example, to a certain height in the axial direction at which pivoting is possible, it is possible to select, for example, whether the pin is brought into contact with a support which is associated with disassembly, or whether the pin is brought into contact with the further support which is associated with assembly.

[0019] According to the invention, the pin is attached to the spindle cover and the pin support is provided in the riser pipe.

[0020] In a preferred embodiment of the hydrant, the pin can be brought into contact with the first support from below, and the pin can be brought into contact with the second support from above. As soon as the pin is brought into contact with the second support, a force can be introduced into it from above (by turning the spindle in one direction). In response, the main valve body is moved upwards. Conversely, as soon as the pin is brought into contact with the first support, a force can be introduced into it from below (by turning the spindle in the opposite direction). In response, the main valve body is moved downwards.

[0021] In a preferred embodiment of the hydrant, the riser pipe is provided with a pin guide in which the pin can be guided, the pin guide comprising: a first guide section in which the pin can be guided in the axial direction of the spindle, the first guide section being delimited at least in sections upwards by the first support, and a second guide section in which the pin can be guided in the axial direction of the spindle, the second guide section being delimited at least in sections downwards by the second support.

[0022] In a preferred embodiment of the hydrant, the first and second guide sections are offset from each other at least in sections. The first and second guide sections can be offset from each other, viewed in the axial direction of the riser pipe.

[0023] In a preferred embodiment of the hydrant, the first and second guide sections overlap at least partially in a section between the first and second supports. The pin can be moved upwards over the first guide section. In a section in which the first and second guide sections overlap at least partially, the spindle cover can be pivoted so that the pin enters the second guide section. Once transferred there, the pin can be moved downwards by reversing the direction of spindle rotation until the pin comes into contact with the second support. As soon as the pin has come into contact with the second support, a force can be applied against it from above. This force is diverted into the spindle nut by continued turning, as a result of which the main valve body is moved upwards.

[0024] Conversely, the pin can be transferred from the second guide section to the first guide section. From there, the pin can be brought into contact with the first support from below. Once the pin is brought into contact with the first support, a force can be applied against it from below. This force is transferred into the spindle nut by continued rotation, resulting in the main valve body being moved downward.

[0025] In a preferred embodiment of the hydrant, the pin guide is designed as a recess in the riser pipe. The pin guide can be designed as a recess or groove cut into the material of the riser pipe.

[0026] In a preferred embodiment of the hydrant, the pin is substantially L-shaped, comprising a projection that, viewed in the radial direction of the spindle cover, is directed outward, wherein the projection can be brought into contact with the first and second supports. In a further preferred embodiment, the projection engages in the pin guide. The projection engages in the first and second guide sections of the pin guide and is reliably guided axially therein. The projection forms a counterbearing, via which the pin of the spindle cover can be brought into contact with the first or second support and can introduce a force.

[0027] In a preferred embodiment of the hydrant, the riser pipe is perforated upwards in the area of ​​the second guide section. The spindle assembly can be easily removed from the riser pipe through the perforation.

[0028] In a preferred design of the hydrant, the spindle cover can be screwed onto the riser pipe.

[0029] The invention further relates to a method for disassembling a spindle assembly from a hydrant according to one of claims 1 to 11, the method comprising the successive steps: Detaching the spindle cover from the riser pipe, rotating the spindle in one direction to raise the spindle cover to a predetermined height, rotating the spindle in one direction to lower the spindle cover, continuing to rotate the spindle in the same direction and thereby introducing a force generated by the continued rotation of the spindle via the pin into the second support, removing the spindle assembly from the riser pipe.

[0030] The predetermined height can comprise a height of the spindle cover from which the spindle cover can be rotated or pivoted such that the pin, viewed in the axial direction of the riser pipe, can be aligned with the second support at least in sections. By means of friction between the spindle cover and the spindle, for example, the spindle cover can be carried or rotated by rotating the spindle in the direction in which the spindle cover is lowered, such that the pin, viewed in the axial direction of the riser pipe, can be aligned with the second support. The spindle cover can therefore rotate with the applied rotation, so that the spindle cover does not have to be pivoted by hand. Alternatively, the spindle cover can also be pivoted by hand such that the pin, viewed in the axial direction of the riser pipe, is aligned with the second support.

[0031] The steps for removing the spindle assembly from the hydrant are self-explanatory and can be quickly learned, even by inexperienced operators. The steps can be easily performed even on hydrants that are difficult to access, such as underground hydrants. Furthermore, no separate tools are required.

[0032] The present invention is further explained below, among other things, with reference to the processes shown in the drawing for disassembling a spindle assembly from an underground hydrant and for assembling the spindle assembly into the underground hydrant. The drawing shows: Fig. 1a sectional view through a hydrant in the longitudinal direction, wherein the hydrant is designed as an underground hydrant, Figs. 2a,b a partial sectional view of an underground hydrant, which is shown in abbreviated form for better clarity ( <h2 style=";text-align:left;direction:ltr">Fig. 2a), as well as a sectional view in section of a pin / pin support arrangement to illustrate a respective position of a projection of a pin of a spindle cover ( <h2 style=";text-align:left;direction:ltr"> Fig. 2b ), where the spindle cover is screwed to a riser pipe of the underground hydrant, Figs. 3a,b view according to <h2 style=";text-align:left;direction:ltr"> Figure 2a,b to explain a process for dismantling a spindle assembly from the hydrant, wherein the spindle cover is detached from the riser pipe of the underground hydrant and is raised by turning a spindle of the underground hydrant relative to the riser pipe, Figs. 4a,b a view according to <h2 style=";text-align:left;direction:ltr"> Figure 2a,b to explain a process for dismantling the spindle assembly from the hydrant, whereby the spindle cover is opposite to the illustration in <h2 style=";text-align:left;direction:ltr"> Figure 3a,b is pivoted clockwise, Figs. 5a, view according to <h2 style=";text-align:left;direction:ltr"> Figure 2a,bto explain a process for dismantling the spindle assembly from the hydrant, whereby a projection of a pin of the spindle cover is shown in <h2 style=";text-align:left;direction:ltr"> Figure 4a,b is brought into contact with a second support formed in the riser pipe and a force is applied to this by turning the spindle, whereby the main valve body is raised in counter-reaction, Figs. 6 a view according to <h2 style=";text-align:left;direction:ltr"> Figure 2a,b , the spindle assembly being shown removed upwards from the riser pipe, Figs. 7a,b a view according to <h2 style=";text-align:left;direction:ltr"> Figure 2a,b , to explain a process for mounting the spindle assembly in the hydrant, wherein the projection of the pin of the spindle cover engages in the first guide section and is aligned with a first support formed in the riser pipe, Figs. 8a,b view according to <h2 style=";text-align:left;direction:ltr"> Figure 2a,b , to explain a process for mounting the spindle assembly in the hydrant, whereby the projection of the spindle cover pin is opposite to the illustration in <h2 style=";text-align:left;direction:ltr"> Figure 7a,bis brought into contact with the first support and a force is applied or introduced thereto by turning the spindle, whereby the main valve body is lowered in counter-reaction, Figs. 9 a view according to <h2 style=";text-align:left;direction:ltr"> Figure 2a,b , to explain a process for mounting the spindle assembly in the hydrant, with the main valve body opposite <h2 style=";text-align:left;direction:ltr"> Figure 8a,b by further turning the spindle it is lowered so far that it fits tightly into a sealing seat of the hydrant.

[0033] The <h2 style=";text-align:left;direction:ltr"> Fig. 1 shows an underground hydrant 10 in a longitudinal section. <h2 style=";text-align:left;direction:ltr"> Figure 2a,b until <h2 style=";text-align:left;direction:ltr"> Figure 6 show processes to explain the disassembly of a spindle assembly 12 from the underground hydrant 10. The <h2 style=";text-align:left;direction:ltr"> Figure 7a,b until <h2 style=";text-align:left;direction:ltr"> Figure 9 show processes to explain the assembly of the spindle assembly 12 in the underground hydrant 10.

[0034] The hydrant 10 comprises a riser pipe 14 and a main valve 16. The main valve 16 comprises a main valve body 18, which can be brought into sealing engagement with a sealing seat 20 formed in the riser pipe 14. The main valve body 18 is reliably axially guided in the region of the sealing seat 20 by vanes 21', 21'' formed on the main valve body 18. In the embodiment shown, the hydrant 10 is opened by moving the main valve body 18, reliably axially guided by the vanes 21', 21'', downwards towards a dead space. Conversely, to close the hydrant 10, the main valve body 18 is moved upwards.

[0035] The main valve 16 further comprises a valve rod 22, which is fixedly connected at its lower end to the main valve body 18. The main valve 16 also contains the spindle assembly 12. The spindle assembly 12 comprises a spindle cover 24, which can be fastened to the riser pipe 14 via screws 26', 26''. The spindle assembly 12 further comprises a spindle 28, which is rotatably mounted on the spindle cover 24. A coupling element 30, e.g., an operating square, projects outward on the outside of the hydrant 10 beyond the spindle cover 24 and is rotationally fixedly coupled to the spindle 28. The spindle 28 is threadedly engaged with a spindle nut 32. The spindle nut 32 is coupled to the upper end of the valve rod 22 via a coupling / guide arrangement 34, designed to convert a torque applied to the spindle 28 into an axial adjustment of the valve rod 22.The coupling / guide assembly 34 includes a radially outwardly directed extension 36, which engages in a longitudinal groove 38 formed inside the riser tube 14 and can be guided therein only in the axial direction of the riser tube 14. As a result, the coupling / guide assembly 34 and thus the valve rod 22 coupled thereto are adjustable only in the axial direction of the riser tube 14.

[0036] The hydrant 10 further comprises on its outlet side a hose coupling 40 for coupling to, for example, a hose (not shown) via, for example, two claws 41', 41''. The hose coupling 40 can be sealed from the outside by a closing cover 42. Furthermore, the hose coupling 40 can be provided with a backflow preventer 44. The hydrant 10 can be connected in a fluid-tight manner to a water inlet (not shown) via a flange 46 on the underside with an intermediate seal 48. A bulbous section on the underside of the hydrant 10 defines a dead space 50 between the main valve body 18 and the water inlet.

[0037] In an embodiment of the hydrant 10 according to the invention, the spindle assembly 12 is further provided with a pin / pin support assembly 52. ​​The pin / pin support assembly 52 comprises two pins 54', 54'', which are attached or formed on the spindle cover 24, offset by 180° from one another, and two pin support assemblies 56', 56'' provided in the riser pipe 14, also offset by 180° from one another, each comprising a first support 58', 58'' and a second support 60', 60''. The first support 58',58'' and second support 60',60'' are offset from one another in the axial direction of the riser pipe 14, so that the pins 54',54'' can be brought into contact with the first support 58',58'' from below and can be brought into contact with the second support 60',60'' from above.

[0038] The pins 54', 54'' are essentially L-shaped, each comprising a web 62', 62'' and a projection 64', 64'' adjoining the web at the distal end, which protrude outwardly as viewed in the radial direction of the spindle cover 24. The projections 64', 64'' can each be brought into contact with the first support 58', 58'' and the second support 60', 60''.

[0039] The pins 54', 54'' can be guided via their projections 64', 64'' in corresponding pin guides which are incorporated in the riser pipe 14. The pin guides each comprise a first guide section 66', 66'', in which the pins 54', 54'' can be guided in the axial direction of the spindle 28, wherein the first guide section 66', 66'' is delimited at the top, at least in sections, by the first support 58', 58''. The pin guides further each comprise a second guide section 68', 68'', in which the pins 54', 54'' can also be guided in the axial direction of the spindle 28, wherein the second guide section 68', 68'' is delimited at the bottom, at least in sections, by the second support 60', 60''.

[0040] The first guide section 66', 66'' and the second guide section 68', 68'' are offset from one another at least in sections, and they may overlap at least in sections in a region between the first support 58', 58'' and the second support 60', 60''. This arrangement allows the spindle cover 24 to be pivoted in sections, specifically via its pins 54', 54'', from the first guide section 66', 66'' into the second guide section 68', 68'' and vice versa.

[0041] The following explains the procedures for dismantling the spindle assembly 12 and thus the main valve 16 from the hydrant 10.

[0042] Based on the <h2 style=";text-align:left;direction:ltr"> Figure 2a,b shown starting position, as in <h2 style=";text-align:left;direction:ltr"> Figure 3a,bAs shown, the screws 26', 26'' are removed. The spindle 28 is then rotated in a direction, e.g., counterclockwise (CCW), by applying a torque to the coupling element 30, in which direction the spindle cover 24 is raised. The spindle cover 24 advantageously does not rotate, since it is guided by the projections 64', 64'' engaging in the first guide section 66', 66''.

[0043] The spindle cover 24 is raised by turning until the projections 64', 64'' of the pins 54', 54'' reach a level between the first support 58', 58'' and the second support 60', 60'', or reach the section in which the first guide section 66', 66'' and the second guide section 68', 68'' overlap. For example, the spindle cover 24 can be raised by turning until the projections 64', 64'' strike the first support 58', 58'' (see <h2 style=";text-align:left;direction:ltr"> Fig. 3b ). The main valve body 18 remains in the same position.

[0044] Starting from this position, as in <h2 style=";text-align:left;direction:ltr"> Figure 4a ,b, the projections 64', 64'' are transferred from the first guide section 66', 66'' into the second guide section 68', 68''. For this purpose, the spindle 28 is simply rotated in the opposite direction, e.g., clockwise (CW). Due to friction between the spindle cover 24 and the spindle 28, for example, the spindle cover 24 rotates with the applied rotation, so that the spindle cover 24 does not have to be pivoted by hand. The projections 64', 64'' are now aligned in sections with the second support 60', 60''.

[0045] Starting from this position, as in <h2 style=";text-align:left;direction:ltr"> Figure 5a,b, the spindle continues to rotate in the same direction of rotation. The spindle cover 24 lowers and the projections 64', 64'' come into contact with the second support 60', 60''. The rotation continues unchanged, with the force generated being introduced via the projections 64', 64'' into the second support 60', 60''. In response, with continued rotation of the spindle 28, the spindle nut 32, which is threadedly coupled to it, is adjusted upwards, and thereby the main valve body 18, guided over the valve rod 22, is continuously raised. In this process, the main valve body 18 is pulled out of the tight contact with the sealing seat 20. As soon as the main valve body 18 is freed from the tight contact with the sealing seat 20, the spindle assembly 12 or the main valve 16 can be removed upwards from the riser pipe 14, as shown in <h2 style=";text-align:left;direction:ltr"> Fig. 6 illustrated.

[0046] In the following, the procedures for assembling the spindle assembly 12 and thus the main valve 16 in the hydrant 10 are described using the <h2 style=";text-align:left;direction:ltr"> Figures 7a,b to 9 explained.

[0047] For assembly, the spindle assembly 12 or the main valve 16 is inserted into the guide section via the spindle cover 24. To do this, the pins 54', 54'' are inserted into the first guide section 66', 66'' via their projections 64', 64''. As soon as the projections 64', 64'' are at the level of the section in which the first guide section 66', 66'' and the second guide section 68', 68'' overlap, the spindle cover 24 is pivoted, e.g., counterclockwise (CCW), and then lowered further, guided over the second guide section 68', 68''. In this position, the projections 64', 64'' are partially aligned with the first support 58', 58''. In this position, the main valve body 18 can come into contact with the sealing seat 20, e.g., from above.

[0048] Starting from this position, the spindle 28 is rotated in a direction to lift the spindle cover 24, e.g. counterclockwise (CCW), until the projections 64', 64'' come into contact with the first support 58', 58'', as shown in <h2 style=";text-align:left;direction:ltr"> Figure 8a,b shown. In this position, the spindle 28 continues to rotate with the same direction of rotation. The force generated is introduced into the first support 58', 58''. In response, the spindle nut 32 is adjusted downwards with continued rotation of the spindle 28 and thus the main valve body 18 is pressed or forced into the sealing seat 20, as shown in <h2 style=";text-align:left;direction:ltr"> Fig. 9As soon as the main valve body 18 is completely located in the sealing seat 20 or has assumed a predetermined position in the sealing seat 20, the spindle 28 is no longer rotated. For example, in this position, the spindle 28 can be rotated all the way to the stop, which can serve as an indication that the main valve body 18 is completely located in the sealing seat 20.

[0049] Starting from this position, the spindle 28 is rotated in the opposite direction, e.g., clockwise (CW), to lower the spindle cover 24. It may initially be necessary to prevent the spindle cover 24 from rotating or pivoting, e.g., manually. As soon as the spindle cover 24 is guided by the projections 64', 64'' of the pins 54', 54'' engaging in the first guide section 66', 66'', the spindle cover 24 no longer needs to be prevented from rotating. The rotation of the spindle 28 is continued until the spindle cover 24 strikes the riser pipe 14. Once it has reached this position, the spindle cover 24 is screwed to the riser pipe 14 using the screws 26', 26''. The hydrant then resumes the <h2 style=";text-align:left;direction:ltr"> Figure 2a Enter the starting position shown.

Claims

1. Hydrant (10), comprising a riser pipe (14) and a main valve (16), the main valve having a main valve body (18), a sealing seat (20) which can be sealed by the main valve body (18), a valve rod (22) which is connected at one end to the main valve body (18), and a spindle assembly (12), wherein the spindle assembly (12) comprises a spindle cover (24) which can be fastened to the riser pipe (14), a spindle (28) which is rotatably mounted on the spindle cover (24), and a spindle nut (32) which is coupled to the valve rod (22) at another end, wherein the spindle (28) and the spindle nut (32) are in thread engagement with each other, adapted to convert a torque applied to the spindle (28) into an axial movement of the valve rod (22), wherein the spindle assembly (12) further includes a journal / journal support assembly (52), comprising at least one journal (54',54'') and at least one journal support (56',56'') which journal support is provided in the riser pipe (14), wherein the journal support (56',56'') comprises a first support (58',58'') and a second support (60',60''), against each of which the journal (54',54'') can be brought to bear, characterized in that the at least one journal (54',54'') is attached to the spindle cover (24).

2. Hydrant (10) according to claim 1, wherein the first support (58',58'') and the second support (60',60'') are offset from each other.

3. Hydrant (10) according to one of the preceding claims, wherein the journal (54',54'') can be brought to bear against the first support (58',58'') from below and the journal (54',54'') can be brought to bear against the second support (60',60'') from above.

4. Hydrant (10) according to one of the preceding claims, wherein the riser pipe (14) is provided with a journal guide, in which the journal (54',54'') can be guided, wherein the journal guide comprises: - a first guide section (66',66''), in which the journal (54',54'') can be guided in the axial direction of the spindle (28), wherein the first guide section (66',66'') is at least partially bounded in the upward direction by the first support (58',58''), and - a second guide section (68',68''), in which the journal (54',54'') can be guided in the axial direction of the spindle (28), wherein the second guide section (68',68'') is at least partially bounded in the downward direction by the second support (60',60'').

5. Hydrant (10) according to claim 4, wherein the first (66',66'') and second (68',68") guide section are at least partially offset from each other.

6. Hydrant (10) according to claim 4 or 5, wherein the first (66',66'') and second (68',68") guide section are at least partially overlapped in a section between the first (58', 58'') and the second (60', 60") support.

7. Hydrant (10) according to one of claims 4 to 6, wherein the journal guide in the riser pipe (14) is designed as a cutout.

8. Hydrant (10) according to one of the preceding claims, wherein the journal (54',54'') is substantially L-shaped, comprising a projection (64',64'') which is directed outward as viewed in the radial direction of the spindle cover (24), wherein the projection (64',64'') can be brought to bear against the first (58',58'') and second ( 60',60") support.

9. Hydrant (10) according to claim 8, wherein the projection (64',64'') engages in the journal guide.

10. Hydrant (10) according to one of claims 4 to 9, wherein the riser pipe (14) is open in the upward direction in the region of the second guide section (68',68'').

11. Hydrant (10) according to one of the preceding claims, wherein the spindle cover (24) can be screwed onto the riser pipe (14).

12. Method for removing a spindle assembly (12) from a hydrant (10) according to one of claims 1 to 11, comprising the successive steps: - loosening the spindle cover (24) from the riser pipe (14), - rotating the spindle (28) in a direction to raise the spindle cover (24) to a predetermined height, - rotating the spindle (28) in a direction to lower the spindle cover (24), - continuing to rotate the spindle (28) in the same direction and thereby introducing into the second support (60',60''), via the journal (54',54''), a force that is generated by the continued rotation of the spindle (28), - taking the spindle assembly (12) out of the riser pipe (14).

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